USB2412 2-Port USB 2.0 Hi-Speed Hub Controller PRODUCT FEATURES Datasheet General Description Highlights The SMSC USB2412 hub is a low-power, single transaction translator (STT) hub controller IC with two downstream ports for embedded USB applications. The SMSC hub controller supports low-speed, full-speed, and hi-speed (if operating as a hi-speed hub) downstream devices on all of the enabled downstream ports. Features Applications Fully integrated USB termination and pull-up/pulldown resistors Supports a single external 3.3 V supply source; internal regulators provide 1.2 V internal core voltage On-chip 24 MHz crystal driver or external 24 MHz clock input ESD protection up to 4 kilovolts on all USB pins Supports self-powered operation Contains a built-in default configuration; no external configuration options or components are required Downstream ports as optional non-removable ports Supports compound devices on a port-by-port basis 28-pin QFN (5 x 5 mm) lead-free RoHS compliant package Supports the commercial temperature range: 0C to +70C SMSC USB2412 High performance, low-power, small footprint hub controller IC with two downstream ports Fully compliant with the USB 2.0 Specification 1. 28QFN low pin count package Optimized for minimal bill-of-materials and low cost designs Automobile/home audio systems Cable/DSL modems Embedded systems Gaming consoles HDD enclosures IP telephony KVM switches LCD monitors and TVs Multi-function USB peripherals Mobile PC docking PC motherboards PC media drive bay Portable hub boxes Point-of-Sale (POS) systems Printers and scanners Server front panels Set-top boxes, DVD players, DVR/PVR Thin client terminals DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Order Numbers: ORDER NUMBERS* USB2412-DZK USB2412-DZK-TR LEAD-FREE ROHS COMPLIANT PACKAGE 28-Pin QFN Lead-Free, RoHS Compliant Package (includes tape and reel option) PACKAGE SIZE REEL SIZE - 5 x 5 x 0.5 mm This product meets the halogen maximum concentration values per IEC61249-2-21 For RoHS compliance and environmental information, please visit www.smsc.com/rohs 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000 or 1 (800) 443-SEMI Copyright (c) 2011 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC's website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems Corporation ("SMSC"). Product names and company names are the trademarks of their respective holders. SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT; TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Revision 1.3 (12-27-11) 2 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Conventions Within this manual, the following abbreviations and symbols are used to improve readability. Example BIT FIELD.BIT x...y BITS[m:n] PIN zzzzb 0xzzz zzh rsvd code Section Name x <Parameter> {,Parameter} [Parameter] SMSC USB2412 Description Name of a single bit within a field Name of a single bit (BIT) in FIELD Range from x to y, inclusive Groups of bits from m to n, inclusive Pin Name Binary number (value zzzz) Hexadecimal number (value zzz) Hexadecimal number (value zz) Reserved memory location. Must write 0, read value indeterminate Instruction code, or API function or parameter Section or Document name Don't care <> indicate a Parameter is optional or is only used under some conditions Braces indicate Parameter(s) that repeat one or more times Brackets indicate a nested Parameter. This Parameter is not real and actually decodes into one or more real parameters. 3 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Table of Contents Chapter 1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Chapter 2 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1 2.2 2.3 2.4 2.5 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 28-Pin Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Pin Descriptions (Grouped by Function). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Strap Option Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Chapter 3 Internal Default Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.1 3.2 Hub Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.1 External Hardware RESET_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2.2 USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 14 14 15 Chapter 4 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.1 4.2 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2.1 Pin Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2.2 Package Thermal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 16 19 19 Chapter 5 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.1 5.2 Oscillator/Crystal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 External Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.2.1 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Chapter 6 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.1 Tape and Reel Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Revision 1.3 (12-27-11) 4 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet List of Figures Figure 1.1 Figure 2.1 Figure 2.2 Figure 2.3 Figure 3.1 Figure 4.1 Figure 5.1 Figure 5.2 Figure 6.1 Figure 6.2 Figure 6.3 Figure 6.4 Figure 6.5 USB2412 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 USB2412 28-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Non-Removable Pin Strap Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 LED Pin Strap Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Reset_N Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Supply Rise Time Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Typical Crystal Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Formula to Find the Value of C1 and C2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 USB2412 28-Pin QFN Package Outline (5x5 mm Body, 0.5 Pitch, 3.1 ePad). . . . . . . . . . . . 22 Recommended Printed Circuit Board (PCB) Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . 23 28-Pin Package Tape Dimensions and Part Orientation (mm) . . . . . . . . . . . . . . . . . . . . . . . 24 28-Pin Package Tape Length and Part Quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Package Reel Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 SMSC USB2412 5 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet List of Tables Table 2.1 Table 2.2 Table 2.3 Table 3.1 Table 4.1 Table 4.2 Table 4.3 Table 5.1 Table 6.1 USB2412 28-Pin Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 USB2412 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Reset_N Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Pin Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 28-Pin QFN Package Thermal Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Crystal Circuit Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Package Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Revision 1.3 (12-27-11) 6 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 1 Block Diagram To Upstream Upstream USB Data VBUS 24 MHz Crystal 3.3 V BusPower Detect/ Vbus Pulse Regulator Upstream PHY Serial Interface Engine Repeater PLL Controller 3.3 V Transaction Translator Regulator Port Controller CRFILT Routing & Port Re-Ordering Logic PHY#1 PHY#2 USB Data Downstream USB Data Downstream Figure 1.1 USB2412 Block Diagram SMSC USB2412 7 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 2 Pin Descriptions This chapter is organized by a set of pin configurations followed by a corresponding pin list organized by function according to their associated interface. A detailed description list of each signal (named in the pin list) is organized by function in Table 2.2, "USB2412 Pin Descriptions," on page 10. Refer to Table 2.3, "Buffer Type Descriptions," on page 12 for a list of buffer types. The "N" symbol in the signal name indicates that the active, or asserted, state occurs when the signal is at a low voltage level. When "N" is not present after the signal name, the signal is asserted when it is at the high voltage level. The terms assertion and negation are used exclusively. This is done to avoid confusion when working with a mixture of "active low" and "active high" signals. The term assert, or assertion, indicates that a signal is active, independent of whether that level is represented by a high or low voltage. The term negate, or negation, indicates that a signal is inactive. USBDM_UP VDD33 SUSP_IND/NON_REM0 VBUS_DET RESET_N HS_IND TEST1 21 20 19 18 17 16 15 Pin Configuration USBDP_UP 22 14 VDD33 XTALOUT 23 13 NON_REM1 XTALIN/CLKIN 24 12 OCS_N2 PLLFILT 25 11 PRTPWR2 RBIAS 26 10 VDD33 VDD33 27 USBDM_DN1 28 SMSC USB2412 (Top View QFN-28) 4 5 6 7 NC TEST PRTPWR1 3 USBDP_DN2 VDD33 2 USBDP_DN1 USBDM_DN2 Ground Pad (must be connected to VSS) 1 2.1 9 CRFILT 8 OCS_N1 Indicates pins on the bottom of the device. Figure 2.1 USB2412 28-Pin QFN Revision 1.3 (12-27-11) 8 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet 2.2 28-Pin Table Table 2.1 USB2412 28-Pin Table UPSTREAM USB 2.0 INTERFACES (3 PINS) USBDP_UP USBDM_UP VBUS_DET DOWNSTREAM 2-PORT USB 2.0 INTERFACES (9 PINS) USBDP_DN1 USBDM_DN1 USBDP_DN2 USBDM_DN2 PRT_PWR1 PRT_PWR2 OCS_N1 OCS_N2 XTALOUT RBIAS MISC (7 PINS) RESET_N TEST XTALIN / CLKIN NON_REM1 SUSP_IND / NON_REM0 HS_IND POWER, GROUND, AND NO CONNECTS (9 PINS) (5) VDD33 CRFILT PLLFILT VSS NC TOTAL 28 SMSC USB2412 9 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet 2.3 Pin Descriptions (Grouped by Function) Table 2.2 USB2412 Pin Descriptions PIN # SYMBOL BUFFER TYPE DESCRIPTION UPSTREAM USB 2.0 INTERFACES 21 22 USBDM_UP USBDP_UP IO-U USB Bus Data: connect to the upstream USB bus data signals (host, port, or upstream hub). 18 VBUS_DET I/O12 Detect Upstream VBUS Power: detects the state of upstream VBUS power. The SMSC hub monitors VBUS_DET to determine when to assert the internal D+ pull-up resistor which signals a connect event. When designing a detachable hub, this pin should be connected to VBUS on the upstream port via a 2 to 1 voltage divider. For self-powered applications with a permanently attached host, this pin must be connected to a dedicated host control output, or connected to 3.3 V domain that powers the host.` According to Section 7.2.1 of the USB 2.0 Specification 1., a downstream port can never provide power to its D+ or D- pull-up resistors unless the upstream port's VBUS is in the asserted (powered) state. VBUS_DET monitors the state of the upstream VBUS signal and will not pull-up the D+ resistor if VBUS is not active. If VBUS goes from an active to an inactive state (Not Powered), the hub will remove power from the D+ pull-up resistor within 10 seconds. DOWNSTREAM USB 2.0 INTERFACES 1 3 28 2 USBDP_DN1 USBDP_DN2 USBDM_DN1 USBDM_DN2 IO-U Hi-Speed USB Data: connect to the downstream USB peripheral devices attached to the hub's ports. 7 11 PRTPWR1 PRTPWR2 I/O12 USB Power Enable: enables power to USB peripheral devices that are downstream, where the hub supports active high power controllers only. 8 12 OCS_N1 OCS_N2 IPU Over-Current Sense: input from external current monitor indicating an over-current condition. This pin contains an internal pull-up to the 3.3 V supply. 26 RBIAS I-R USB Transceiver Bias: a 12.0 k (+/- 1%) resistor is attached from ground to this pin to set the transceiver's internal bias settings. MISC 13 NON_REM1 I/O Non-removable Port Strap Option: this pin is sampled (in conjunction with SUSP_IND/NON_REM0) at RESET_N negation to determine if ports [2:1] contain permanently attached (non-removable) devices: NON_REM[1:0] = 00: all ports are removable NON_REM[1:0] = 01: port 1 is non-removable NON_REM[1:0] = 10 and 11: ports 1 and 2 are non-removable See Section 2.5, "Strap Option Pins" for details. Revision 1.3 (12-27-11) 10 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Table 2.2 USB2412 Pin Descriptions (continued) PIN # SYMBOL BUFFER TYPE 19 SUSP_IND / I/O DESCRIPTION Active/Suspend Status LED (suspend indicator): indicates the USB hub state. See Section 2.5, "Strap Option Pins" for details. NON_REM0 = 0: SUSP_IND is active high NON_REM0 = 1: SUSP_IND is active low negated = unconfigured, or configured and in USB suspend asserted = hub is configured and is active (i.e., not in suspend) NON_REM0 Non-removable Port Strap Option: this pin is sampled (in conjunction with NON_REM1) at RESET_N negation to determine if ports [2:1] contain permanently attached (non-removable) devices: NON_REM[1:0] = 00: all ports are removable NON_REM[1:0] = 01: port 1 is non-removable NON_REM[1:0] = 10 and 11: ports 1 and 2 are non-removable See Section 2.5, "Strap Option Pins" for details. 16 HS_IND I/O12 Hi-Speed Upstream Port Indicator Note: An LED can be attached for visual indication. See Section 2.5, "Strap Option Pins" for details. When an LED is not used, this pin requires a 50 k or higher resistor to ground. negated = the hub is connected at FS asserted = the hub is connected at HS 24 XTALIN ICLKx CLKIN 24 MHz Crystal Input: this pin connects to either one terminal of the crystal or to an external 24 MHz clock when a crystal is not used. External Clock Input: this pin connects to either one terminal of the crystal or to an external 24 MHz clock when a crystal is not used. 23 XTALOUT OCLKx 6 TEST IPD 17 RESET_N IS 24 MHz Crystal Output: this is the other terminal of the crystal circuit with 1.2 V p-p output and a weak (< 1mA) driving strength. When an external clock source is used to drive XTALIN/CLKIN, leave this pin unconnected, or use with appropriate caution. Treat as a no connect pin or connect to ground. No trace or signal should be routed or attached to this pin. RESET Input: the system can reset the chip by driving this input low, where the minimum active low pulse is 1 s. POWER, GROUND, and NO CONNECTS 9 CRFILT VDD Core Regulator Filter Capacitor: this pin can have up to 0.1 F low-ESR capacitor to VSS, or be left unconnected. 4 10 14 20 27 VDD33 3.3 V Power 25 PLLFILT PLL Regulator Filter Capacitor: this pin can have up to 0.1 F low-ESR capacitor to VSS, or be left unconnected. 15 TEST1 SMSC USB2412 This pin must be connected to VSS. 11 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Table 2.2 USB2412 Pin Descriptions (continued) PIN # SYMBOL 29 ePAD Ground Pad/ePad: this pin must be connected to VSS for the device and must be tied to ground with multiple vias 5 NC No Connect: no signal or trace should be routed or attached to these pins. 2.4 BUFFER TYPE DESCRIPTION Buffer Type Descriptions Table 2.3 Buffer Type Descriptions BUFFER I/O Input/Output IPD Input with internal weak pull-down resistor IPU Input with internal weak pull-up resistor IS Input with Schmitt trigger I/O12 Input/Output buffer with 12 mA sink and 12 mA source ICLKx XTAL clock input OCLKx XTAL clock output I-R RBIAS I/O-U 2.5 DESCRIPTION Analog Input/Output defined in USB specification Strap Option Pins The NON_REM[1:0] strap option pins can be enabled using the internal default configuration. The driver type of each strap pin is I/O (no internal pull-up or pull-down for the input function). Figure 2.2 shows an example of Strap High and Strap Low configurations, where Strap High sets the strap option to a 1 and Strap Low sets the strap option value to 0. To use an external LED indicator, the options outlined in Figure 2.3 should be implemented. +V 50 k Strap Pin Primary Function/ Strap High HUB Primary Function/ Strap Low Strap Pin HUB 50 k GND Figure 2.2 Non-Removable Pin Strap Example Revision 1.3 (12-27-11) 12 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet 50 k LED/ Strap High Strap Pin Strap Pin HUB HUB 50 k LED/ Strap Low Figure 2.3 LED Pin Strap Example SMSC USB2412 13 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 3 Internal Default Configuration SMSC's USB 2.0 hub is fully compliant with the USB Specification1.. Refer to Chapter 10 (Hub Specification) for general details regarding hub operation and functionality. The hub provides one Transaction Translator (TT) that is shared by both downstream ports (defined as Single-TT configuration). The TT contains 4 non-periodic buffers. 3.1 Hub Configuration The USB2412 only supports internal defaults with the exception of the non-removable strap option (using NON_REM[1:0]). The hub internal default settings are as follows: 3.2 Internal Default Configuration without over-rides Strap options enabled Self-powered operation enabled Individual power switching Individual over-current sensing Reset There are two different resets that the hub experiences. One is a hardware reset via RESET_N and the second is a USB Bus Reset. 3.2.1 External Hardware RESET_N A valid hardware reset is defined as assertion of RESET_N for a minimum of 1 s after all power supplies are within operating range. While reset is asserted, the hub (and its associated external circuitry) consumes less than 500 A of current from the upstream USB power source. Assertion of RESET_N causes the following: 1. All downstream ports are disabled, and PRTPWR power to downstream devices is removed. 2. The PHYs are disabled, and the differential pairs will be in a high-impedance state. 3. All transactions immediately terminate; no states are saved. 4. All internal registers return to the default state (in most cases, 00h). 5. The external crystal oscillator is halted. 6. The PLL is halted. 7. The hub is "operational" 500 s after RESET_N is negated. Revision 1.3 (12-27-11) 14 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet 3.2.1.1 RESET_N Hardware reset asserted p Outputs to inactive levels Read NON_REM[1:0] t1 USB Upstream USB Reset recovery Start completion request response t7 t6 t5 Idle t8 t2 t3 RESET_N VSS t4 NON_REM[1:0] Don't Care Valid Driven by Hub if strap is an output Don't Care VSS Figure 3.1 Reset_N Timing Table 3.1 Reset_N Timing NAME DESCRIPTION MIN TYP MAX UNITS 1 sec Strap setup time 16.7 nsec t3 Strap hold time 16.7 t4 Hub outputs driven to inactive logic states t5 USB attach (See Note) t6 Host acknowledges attach and signals USB reset t7 USB idle t8 Completion time for requests (with or without data stage) t1 RESET_N asserted t2 1.5 1400 nsec 2 sec 100 msec 100 msec undefined msec 5 msec Note: All power supplies must have reached the operating levels mandated in Chapter 4, DC Parameters, prior to (or coincident with) the assertion of RESET_N. 3.2.2 USB Bus Reset In response to the upstream port signaling a reset to the hub, the hub does the following: 1. Sets default address to 0. 2. Sets configuration to unconfigured. 3. Negates PRTPWR[2:1] to all downstream ports. 4. Clears all TT buffers. 5. Moves device from suspended to active (if suspended). 6. Complies with Section 11.10 of the USB 2.0 Specification for behavior after completion of the reset sequence. The host then configures the hub and the hub's downstream port devices in accordance with the specification. Note: The hub does not propagate the upstream USB reset to downstream devices. SMSC USB2412 15 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 4 DC Parameters 4.1 Maximum Guaranteed Ratings PARAMETER SYMBOL MIN MAX UNITS Storage Temperature TSTOR -55 150 C Lead Temperature C 3.3 V supply voltage 4.2 VDD33 PLLFILT CRFILT 4.6 V Voltage on any I/O pin -0.5 5.5 V Voltage on XTALIN -0.5 4.0 V Voltage on XTALOUT -0.5 2.5 V Note 4.1 Refer to JEDEC Specification J-STD-020D 5.. Note 4.2 Stresses above the specified parameters could cause permanent damage to the device. This is a stress rating only and functional operation of the device at any condition above those indicated in the operation sections of this specification is not implied. Note 4.3 When powering this device from laboratory or system power supplies, it is important that the absolute maximum ratings not be exceeded or device failure can result. Some power supplies exhibit voltage spikes on their outputs when the AC power is switched on or off. In addition, voltage transients on the AC power line may appear on the DC output. When this possibility exists, it is suggested that a clamp circuit be used. Operating Conditions PARAMETER SYMBOL MIN MAX UNITS Operating Temperature TA 0 70 C 3.3 V supply voltage VDD33 3.0 3.6 V 3.3 V supply rise time tRT 0 400 s See Figure 4.1 -0.3 5.5 V If any 3.3 V supply voltage drops below 3.0 V, then the MAX becomes: Voltage on any I/O pin COMMENTS Ambient temperature in still air. (3.3 V supply voltage) + 0.5 Voltage on XTALIN Revision 1.3 (12-27-11) -0.3 VDD33 16 DATASHEET V SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Voltage tRT VDD33 3.3 V 100% 90% VSS 10% t90% t10% Time Figure 4.1 Supply Rise Time Model Table 4.1 DC Electrical Characteristics PARAMETER SYMBOL MIN TYP MAX UNITS 0.8 V COMMENTS I, IS Type Input Buffer Low Input Level VILI High Input Level VIHI 2.0 IIL -10 +10 A VHYSI 250 350 mV 0.8 V Input Leakage Hysteresis (`IS' Only) TTL Levels V VIN = 0 to VDD33 Input Buffer with Pull-Up (IPU) Low Input Level High Input Level Low Input Leakage High Input Leakage VILI TTL Levels VIHI 2.0 V IILL +35 +90 A VIN = 0 IIHL -10 +10 A VIN = VDD33 0.8 V TTL Levels Input Buffer with Pull-Down (IPD) Low Input Level High Input Level Low Input Leakage High Input Leakage VILI VIHI 2.0 V IILL +10 -10 A VIN = 0 IIHL -35 -90 A VIN = VDD33 0.5 V ICLK Input Buffer Low Input Level VILCK High Input Level VIHCK 1.4 IIL -10 Input Leakage SMSC USB2412 17 DATASHEET V +10 A VIN = 0 to VDD33 Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Table 4.1 DC Electrical Characteristics (continued) PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS 0.4 V IOL = 12 mA @ VDD33 = 3.3 V O12, I/O12 &I/OSD12 Type Buffer Low Output Level VOL High Output Level Output Leakage Hysteresis (`SD' pad only) VOH 2.4 V IOL -10 +10 A IOH = -12 mA @ VDD33 = 3.3 V VHYSC 250 350 mV VIN = 0 to VDD33 (Note 4.1) Supply Current Unconfigured ICCINTHS 40 45 mA Supply Current Unconfigured ICCINTFS 35 40 mA Supply Current Configured IHCH1 60 65 mA 1 port base 1 port base + + 25 mA 25 mA 45 50 1 port base 1 port base + + 8 mA 8 mA Hi-Speed Host Full-Speed Host Hi-Speed Host, 1 downstream port Supply Current Configured Hi-Speed Host, each additional downstream port Supply Current Configured Full-Speed Host, 1 downstream port IFCC1 Supply Current Configured Full-Speed Host, each additional downstream port mA mA There is no additional current for additional ports. mA Supply Current Suspend ICSBY 475 1000 A All supplies combined Supply Current Reset ICRST 550 1100 A All supplies combined Note 4.4 Output leakage is measured with the current pins in high impedance. Note 4.5 See USB 2.0 Specification 1. for USB DC electrical characteristics. Revision 1.3 (12-27-11) 18 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet 4.2.1 Pin Capacitance Table 4.2 Pin Capacitance LIMITS PARAMETER Clock Input Capacitance Input Capacitance Output Capacitance 4.2.2 SYMBOL MIN TYP MAX UNIT TEST CONDITION CXTAL 6 pF All pins except USB pins and the pins under the test tied to AC ground. CIN 6 pF Capacitance TA = 25C fc = 1 MHz VDD33 = 3.3 V COUT 6 pF The maximum capacitance values include the full length of the pin pad. See the Y dimension in Figure 6.2. Package Thermal Specifications Thermal parameters are measured or estimated for devices with the exposed pad soldered to thermal vias in a multilayer 2S2P PCB per JESD51. Thermal resistance is measured from the die to the ambient air. Table 4.3 28-Pin QFN Package Thermal Parameters PARAMETER Thermal Resistance VELOCITY (meters/sec) 0 JA 1 Junction-to-Top-of-Package 0 JT 1 SMSC USB2412 SYMBOL 19 DATASHEET VALUE 40.3 35.2 0.5 0.6 UNIT C/W C/W Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 5 AC Specifications 5.1 Oscillator/Crystal Parallel Resonant, Fundamental Mode, 24 MHz 350 ppm. XTALIN (CS1 = CB1 + CXTAL1 ) C1 C0 Crystal 1M CL C2 XTALOUT (CS2 = CB2 + CXTAL2 ) Figure 5.1 Typical Crystal Circuit Table 5.1 Crystal Circuit Legend SYMBOL DESCRIPTION IN ACCORDANCE WITH C0 Crystal shunt capacitance CL Crystal load capacitance CB Total board or trace capacitance OEM board design CS Stray capacitance SMSC IC and OEM board design CXTAL XTAL pin input capacitance SMSC IC C1 Load capacitors installed on OEM board Calculated values based on Figure 5.2, "Formula to Find the Value of C1 and C2" (See Note 5.2) C2 Crystal manufacturer's specification (See Note 5.1) C1 = 2 x (CL - C0) - CS1 C2 = 2 x (CL - C0) - CS2 Figure 5.2 Formula to Find the Value of C1 and C2 Note 5.1 C0 is usually included (subtracted by the crystal manufacturer) in the specification for CL and should be set to 0 for use in the calculation of the capacitance formulas in Figure 5.2, "Formula to Find the Value of C1 and C2". However, the PCB itself may present a parasitic capacitance between XTALIN and XTALOUT. For an accurate calculation of C1 and C2, take the parasitic capacitance between traces XTALIN and XTALOUT into account. Note 5.2 Each of these capacitance values is typically approximately 18 pF. Revision 1.3 (12-27-11) 20 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet 5.2 External Clock 50% Duty cycle 10%, 24 MHz 350 ppm, Jitter < 100 ps rms. The external clock is recommended to conform to the signaling level designated in the JESD76-2 specification on 1.2 V CMOS Logic. XTALOUT should be treated as a no connect. 5.2.1 USB 2.0 The SMSC hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the USB 2.0 Specification 1. See the USB Specification for more information. SMSC USB2412 21 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 6 Package Outline Figure 6.1 USB2412 28-Pin QFN Package Outline (5x5 mm Body, 0.5 Pitch, 3.1 ePad) Table 6.1 Package Parameters A A1 A2 D/E D1/E1 D2/E2 L b K e MIN NOMINAL MAX NOTE REMARKS 0.80 0 0.60 4.90 4.55 3.00 0.30 0.18 0.45 0.85 0.02 5.00 4.75 3.10 0.40 0.25 0.55 0.50 BSC 1.00 0.05 0.80 5.10 4.95 3.20 0.50 0.30 - 2 - Overall Package Height Standoff Mold Cap Thickness X/Y Overall Body Size X/Y Mold Cap Size X/Y Exposed Pad Size Terminal Length Terminal Width Terminal to ePad Clearance Terminal Pitch Notes: 1. All dimensions are in millimeters. 2. Position tolerance of each terminal and exposed pad is 0.05 mm at maximum material condition. Instances of dimension "b" apply to plated terminals and is measured between 0.15 and 0.33 mm from the terminal tip. 3. Details of terminal #1 identifier are optional. However, they must be located within the area indicated. 4. Coplanarity zone applies to exposed pad and terminals. Revision 1.3 (12-27-11) 22 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Figure 6.2 Recommended Printed Circuit Board (PCB) Land Pattern SMSC USB2412 23 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet 6.1 Tape and Reel Specification Figure 6.3 28-Pin Package Tape Dimensions and Part Orientation (mm) Figure 6.4 28-Pin Package Tape Length and Part Quantity Revision 1.3 (12-27-11) 24 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Figure 6.5 Package Reel Specifications SMSC USB2412 25 DATASHEET Revision 1.3 (12-27-11) 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Appendix A (Acronyms) I2C(R): Inter-Integrated Circuit1 OCS: Over-Current Sense PCB: Printed Circuit Board PHY: Physical Layer PLL: Phase-Locked Loop QFN: Quad Flat No Leads RoHS: Restriction of Hazardous Substances Directive SCL: Serial Clock SIE: Serial Interface Engine SMBus: System Management Bus TT: Transaction Translator 1.I2C is a registered trademark of Philips Corporation. Revision 1.3 (12-27-11) 26 DATASHEET SMSC USB2412 2-Port USB 2.0 Hi-Speed Hub Controller Datasheet Appendix B References 1. Universal Serial Bus Specification, Version 2.0, April 27, 2000 (12/7/2000 and 5/28/2002 Errata) USB Implementers Forum, Inc. http://www.usb.org 2. I2C-Bus Specification Version 1.1 NXP (formerly a division of Philips). http://www.nxp.com 3. System Management Bus Specification, version 1.0 SMBus. http://smbus.org/specs/ 4. MicroChip 24AA02/24LC02B (Revision C) Microchip Technology Inc. http://www.microchip.com/ 5. JEDEC Specifications: JESD76-2 (June 2001) and J-STD-020D.1 (March 2008) JEDEC Global Standards for the Microelectronics Industry. http://www.jedec.org/standards-documents SMSC USB2412 27 DATASHEET Revision 1.3 (12-27-11)