74CBTLVR3384 - Integrated Device Technology, Inc.

INDUSTRIAL TEMPERATURE RANGE

IDT74CBTLVR3384

LOW-VOLTAGE 10-BIT BUS SWITCH

MARCH 2002

2002 Integrated Device Technology, Inc. DSC-5395/6c

INDUSTRIAL TEMPERATURE RANGE

APPLICATIONS:

• 3.3V High Speed Bus Switching and Bus Isolation

FEATURES:

• Isolation Under Power-Off Conditions

• Over-voltage tolerant

• Latch-up performance exceeds 100mA

•VCC = 2.3V - 3.6V, normal range

• ESD >2000V per MIL-STD-883, Method 3015; >200V using

machine model (C = 200pF, R = 0)

• Available in SSOP, QSOP, and TSSOP packages

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

IDT74CBTLVR3384

PRELIMINARY

FUNCTIONAL BLOCK DIAGRAM SIMPLIFIED SCHEMATIC, EACH

SWITCH

LOW-VOLTAGE 10-BIT

BUS SWITCH

DESCRIPTION:

The CBTLVR3384 is a ten bit high-speed bus switch. It adds an internal

series resistor with each switch to reduce reflection noise in high speed

applications. When closed, the switch acts as a source (series) termination for

the driver connected to it.

The device is organized as dual 5-bit bus switches with separate output-

enable (OE) inputs, to allow use as two 5-bit bus switches or one 10-bit bus

switch. When OE is low, the associated 5-bit bus switch is on and A port is

connected to B port. When OE is high, the switch is open, and a high-impedance

state exists between the two ports.

To ensure the high-impedance state during power up or power down, OE

should be tied to VCC through a pullup resistor; the minimum value of the resistor

is determined by the current-sinking capability of the driver.

1A1

1A5

1OE

SW 1B5

1B1

2A1

2A5

2OE

SW 2B5

2B1

10 OE

INDUSTRIAL TEMPERATURE RANGE

IDT74CBTLVR3384

LOW-VOLTAGE 10-BIT BUS SWITCH

ABSOLUTE MAXIMUM RATINGS(1)

Symbol Description Max. Unit

VCC Supply Voltage Range –0.5 to 4.6 V

VIInput Voltage Range –0.5 to 4.6 V

Continuous Channel Current 128 mA

IIK Input Clamp Current, VI/O < 0 –50 mA

TSTG Storage Temperature Range –65 to +150 °C

NOTE:

1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause

permanent damage to the device. This is a stress rating only and functional operation

of the device at these or any other conditions above those indicated in the operational

sections of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect reliability.

PIN CONFIGURATION

OPERATING CHARACTERISTICS(1)

Symbol Parameter Test Conditions Min. Max. Unit

VCC Supply Voltage 2.3 3.6 V

VIH High-Level Control Input Voltage VCC = 2.3V to 2.7V 1.7 — V

VCC = 2.7V to 3.6V 2 —

VIL Low-Level Control Input Voltage VCC = 2.3V to 2.7V — 0.7 V

VCC = 2.7V to 3.6V — 0.8

TAOperating Free-Air Temperature –40 +85 °C

NOTE:

1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.

SSOP/ QSOP/ TSSOP

TOP VIEW

FUNCTION TABLE(1)

VCC

2A5

2A4

2B4

2B3

2A3

2A2

2B2

2B1

1B1

1A1

1A2

1B2

1B3

1A3

1A4

1B4

1B5

12 13

1OE

2A1

2OE

1A5

GND

2B5

Inputs Inputs/Outputs

1OE 2OE 1B1-1B5 2B1-2B5

L L 1A1-1A5 2A1-2A5

L H 1A1-1A5 Z

H L Z 2A1-2A5

HH Z Z

NOTE:

1 . H = HIGH Voltage Level

L = LOW Voltage Level

X = Don’t Care

Z = High Impedance

INDUSTRIAL TEMPERATURE RANGE

IDT74CBTLVR3384

LOW-VOLTAGE 10-BIT BUS SWITCH

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:

Operating Condition: TA = –40°C to +85°C

NOTES:

1. Typical values are at 3.3V, +25°C ambient.

2. The increase in supply current is attributable to each input that is at the specified voltage level rather than VCC or GND.

3. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by the lower of the voltages

of the two (A or B) terminals.

Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit

VIK Control Inputs, Data I/O VCC = 3V, II = –18mA — — –1.2 V

IIControl Inputs VCC = 3.6V, VI = VCC or GND — — ±1 µA

IOZ Data I/O VCC = 3.6V, VO = 0V or 3.6V switch disabled — — 5 µA

IOFF VCC = 0V, VI or VO = 0V to 3.6V — — 50 µA

ICC VCC = 3.6V, IO = 0, VI = VCC or GND — — 10 µA

∆ICC(2) Control Inputs VCC = 3.6V, one input at 3V, other inputs at VCC or GND — — 3 0 0 µA

CIControl Inputs VI = 3V or 0 — 4 — pF

CIO(OFF) VO = 3V or 0, OE = VCC —7—pF

Max. at VCC = 2.3V VI = 0 IO = 64mA — 30 47

Typ. at VCC = 2.5V IO = 24mA — 30 47

RON(3) VI = 1.7V IO = 15mA — 36 80 Ω

VI = 0 IO = 64mA — 30 42

VCC = 3V IO = 24mA — 30 42

VI = 2.4V IO = 15mA — 32 47

VCC = 2.5V ± 0.2V VCC = 3.3V ± 0.3V

Symbol Parameter Min. Max. Min. Max. Unit

tPD(1) Propagation Delay —0.9 —1.5 ns

A to B or B to A

tEN Output Enable Time 1 6 1 5.3 ns

OE to A or B

tDIS Output DisableTime 1 5.5 1 5.5 ns

OE to A or B

NOTE:

1 . The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance when driven by an ideal voltage source

(zero output impededance).

SWITCHING CHARACTERISTICS

INDUSTRIAL TEMPERATURE RANGE

IDT74CBTLVR3384

LOW-VOLTAGE 10-BIT BUS SWITCH

Open

VLOAD

GND

VCC

Pulse

Generator D.U.T.

500Ω

VIN VOUT

(1, 2)

SAME PHASE

INPUT TR AN SITION

OPPOSITE PH ASE

INPUT TRA NSITION

VOH

VOL

tPLH tPHL

tPHL

tPLH

OUTPUT

VIH

CONTROL

INPUT tPLZ 0V

OUTPUT

NORMALLY

LOW tPZH

SWITCH

CLOSED

OUTPUT

NORMALLY

HIGH

ENABLE DISABLE

SWITCH

OPEN

tPHZ

VOL + VLZ

VOH

tPZL

VLOAD/2 VLOAD/2

VIH

VOL

VOH -VHZ

TEST CIRCUITS AND WAVEFORMS

Propagation Delay

Test Circuits for All Outputs

Enable and Disable Times

NOTE:

1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.

DEFINITIONS:

CL = Load capacitance: includes jig and probe capacitance.

RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.

NOTES:

1. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.

2. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2ns; tR ≤ 2ns.

Test Switch

tPLZ/tPZL VLOAD

tPHZ/tPZH GND

tPD Open

SWITCH POSITION

Symbol VCC(1)= 3.3V±0.3V VCC(2)= 2.5V±0.2V Unit

VLOAD 6 2 x Vcc V

VIH 3 Vcc V

VT1.5 Vcc / 2 V

VLZ 300 150 mV

VHZ 300 150 mV

CL50 30 pF

TEST CONDITIONS

INDUSTRIAL TEMPERATURE RANGE

IDT74CBTLVR3384

LOW-VOLTAGE 10-BIT BUS SWITCH

ORDERING INFORMATION

CORPORATE HEADQUARTERS for SALES: for Tech Support:

2975 Stender Way 800-345-7015 or 408-727-6116 logichelp@idt.com

Santa Clara, CA 95054 fax: 408-492-8674 (408) 654-6459

www.idt.com

IDT XX CBTLV XXX XX

PackageDevice Type

Temp. Range

Shrink Small Outline Package

Quarter-siz e Small Out line Package

Thin Shrink Small Outl ine Package

Low-Voltage 10-Bit Bus Switch

–40°C to +85°C

3384

Family

25Ω ser ie s da m penin g r e si st ors on A and B po rt s