ASM5P2304A September 2005 rev 1.4 3.3V Zero Delay Buffer Features the REF pin. The PLL feedback is required to be driven to Zero input - output propagation delay, adjustable by capacitive load on FBK input. FBK pin, and can be obtained from one of the outputs. The input-to-output propagation delay is guaranteed to be less than 250pS, and the output-to-output skew is guaranteed to Multiple configurations - Refer "ASM5P2304A be less than 200pS. Configurations Table". Input frequency range: 15MHz to 133MHz The ASM5P2304A has two banks of two outputs each. Multiple low-skew outputs. Multiple ASM5P2304A devices can accept the same input Output-output skew less than 200pS. clock and distribute it. In this case the skew between the Device-device skew less than 500pS. outputs of the two devices is guaranteed to be less than Two banks of four outputs. 500pS. Less than 200pS Cycle-to-Cycle jitter (-1, -1H, -2, -2H). The Available in space saving, 8 pin 150-mil SOIC ASM5P2304A is available in two different configurations (Refer "ASM5P2304A Configurations Table). packages. The ASM5P2304A-1 is the base part, where the output 3.3V operation. frequencies equal the reference if there is no counter in the Advanced 0.35< CMOS technology. feedback path. The ASM5P2304A-1H is the high-drive Industrial temperature available. version of the -1 and the rise and fall times on this device Functional Description are much faster. ASM5P2304A is a versatile, 3.3V zero-delay buffer The ASM5P2304A-2 allows the user to obtain REF and designed PC, 1/2X or 2X frequencies on each output bank. The exact workstation, datacom, telecom and other high-performance configuration and output frequencies depend on which applications. It is available in 8 pin package. The part has output drives the feedback pin. to distribute high-speed clocks in an on-chip PLL which locks to an input clock presented on Block Diagram FBK CLKA1 REF PLL CLKA2 /2 Extra Divider (-2) CLKB1 CLKB2 Alliance Semiconductor 2575 Augustine Drive * Santa Clara, CA * Tel: 408.855.4900 * Fax: 408.855.4999 * www.alsc.com Notice: The information in this document is subject to change without notice. ASM5P2304A September 2005 rev 1.4 ASM5P2304A Configurations Device Feedback From Bank A Frequency Bank B Frequency ASM5P2304A-1 Bank A or Bank B Reference Reference ASM5P2304A-1H Bank A or Bank B Reference Reference ASM5P2304A-2 Bank A Reference Reference /2 ASM5P2304A-2 Bank B 2 X Reference Reference ASM5P2304A-2H Bank A Reference Reference/2 ASM5P2304A-2H Bank B 2 X Reference Reference Zero Delay and Skew Control For applications requiring zero input-output delay, all outputs must be equally loaded. 1500 REF-Input to CLKA / CLKB Delay (pS) 1000 500 0 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 -500 -1000 -1500 Output Load Difference: FBK Load - CLKA/CLKB Load (pF) REF Input to CLKA/CLKB Delay Vs Difference in Loading between FBK pin and CLKA/CLKB pins To close the feedback loop of the ASM5P2304A, the FBK For applications requiring zero input-output delay, all pin can be driven from any of the four available output pins. outputs including the one providing feedback should be The output driving the FBK pin will be driving a total load of equally loaded. If input-output delay adjustments are 7pF plus any additional load that it drives. The relative required, use the above graph to calculate loading loading of this output (with respect to the remaining differences between the feedback output and remaining outputs) can adjust the input output delay. This is shown in outputs. For zero output-output skew, be sure to load the above graph. outputs equally. 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 2 of 15 ASM5P2304A September 2005 rev 1.4 Pin Configuration 8 FBK REF 1 CLKA1 2 ASM5P2304A 7 VDD CLKA2 3 6 CLKB2 GND 4 5 CLKB1 Pin Description for ASM5P2304A Pin # Pin Name 1 REF 2 CLKA1 3 CLKA2 4 GND 5 CLKB1 6 CLKB2 1 Description Input reference frequency, 5V tolerant input 2 Buffered clock output, bank A 2 Buffered clock output, bank A Ground 2 Buffered clock output, bank B 2 Buffered clock output, bank B 7 VDD 3.3V supply 8 FBK PLL feedback input Notes: 1. Weak pull-down. 2. Weak pull-down on all outputs. 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 3 of 15 ASM5P2304A September 2005 rev 1.4 Absolute Maximum Ratings Parameter Min Max Unit Supply Voltage to Ground Potential -0.5 +7.0 V DC Input Voltage (Except REF) -0.5 VDD + 0.5 V DC Input Voltage (REF) -0.5 7 V Storage Temperature -65 +150 C Max. Soldering Temperature (10 sec) 260 C Junction Temperature 150 C 2000 V Static Discharge Voltage (As per JEDEC STD22- A114-B) Note: These are stress ratings only and functional usage is not implied. Exposure to absolute maximum ratings for prolonged periods can affect device reliability. Operating Conditions for ASM5P2304A Commercial Temperature Devices Parameter Description Min Max Unit 3.0 3.6 V 0 70 C VDD Supply Voltage TA Operating Temperature (Ambient Temperature) CL Load Capacitance, from 15MHz to 100MHz 30 pF CL Load Capacitance, from 100MHz to 133MHz 15 pF CIN Input Capacitance 7 pF 3 Note: 3. Applies to both Ref Clock and FBK. 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 4 of 15 ASM5P2304A September 2005 rev 1.4 Electrical Characteristics for ASM5P2304A Commercial Temperature Devices Parameter Description Test Conditions Min Max Unit 0.8 V VIL Input LOW Voltage VIH Input HIGH Voltage IIL Input LOW Current VIN = 0V 50.0 <A IIH Input HIGH Current VIN = VDD 100.0 <A 0.4 V VOL Output LOW Voltage VOH Output HIGH Voltage 2.0 4 IOL = 8mA (-1, -2) IOH = 12mA (-1H, -2H) 4 IOL = -8mA (-1, -2) IOH = -12mA (-1H, -2H) 2.4 Unloaded outputs 100MHz REF, Select inputs at VDD or GND IDD Supply Current V Unloaded outputs, 66MHz REF (-1, -1H, -2, -2H) Unloaded outputs, 33MHz REF (-1, -1H, -2, -2H) V 45.0 32.0 mA 18.0 Note: 4. Parameter is guaranteed by design and characterization. Not 100% tested in production. 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 5 of 15 ASM5P2304A September 2005 rev 1.4 Switching Characteristics for ASM5P2304A Commercial Temperature Devices Parameter Description Test Conditions Min Typ Max Unit 1/t1 Output Frequency 30pF load, -1H, -2H devices 15 133 MHz 1/t1 Output Frequency 15pF load, -1, -2 devices 15 133 MHz Duty Cycle5= (t2 / t1) * 100 (-1, -2, -1H, -2H) Measured at 1.4V, FOUT = 66.66MHz 30pF load 40.0 50.0 60.0 % Duty Cycle5 = (t2 / t1) * 100 (-1, -2,-1H, -2H) Measured at 1.4V, FOUT = <50MHz 15 pF load 45.0 50.0 55.0 % t3 Output Rise Time5 (-1, -2) Measured between 0.8V and 2.0V 30pF load 2.20 nS 5 t3 Output Rise Time (-1, -2) Measured between 0.8V and 2.0V 15pF load 1.50 nS t3 Output Rise Time5 (-1H, -2H) Measured between 0.8V and 2.0V 30pF load 1.50 nS t4 Output Fall Time 5 (-1, -2) Measured between 2.0V and 0.8V 30pF load 2.20 nS t4 Output Fall Time 5 (-1, -2) Measured between 2.0V and 0.8V 15pF load 1.50 nS t4 Output Fall Time (-1H, -2H) Measured between 2.0V and 0.8V 30pF load 1.25 nS All outputs equally loaded 200 Output-to-output skew (-1H, -2H) All outputs equally loaded 200 Output bank A -to- output bank B skew (-1, -2H) All outputs equally loaded 200 Output bank A to output Bank B skew (-2) All outputs equally loaded 400 Delay, REF Rising Edge to FBK Rising Edge5 Measured at VDD /2 0 250 pS 0 500 pS 5 Output-to-output skew on same bank (-1, -2) t5 t6 5 pS 5 t7 Device-to-Device Skew Measured at VDD/2 on the FBK pins of the device t8 Output Slew Rate5 Measured between 0.8V and 2.0V using Test Circuit #2 Measured at 66.67MHz, loaded outputs, 15pF load tJ tJ tLOCK Cycle-to-cycle jitter 5 (-1, -1H, -2H) Cycle-to-cycle jitter 5 (-2) PLL Lock Time 5 1 V/nS 175 Measured at 66.67MHz, loaded outputs, 30pF load 200 Measured at 25MHz, loaded outputs, 15pF load 100 Measured at 66.67MHz, loaded outputs, 30pF load 400 Measured at 66.67MHz, loaded outputs, 15pF load 375 Stable power supply, valid clock presented on REF and FBK pins 1.0 pS pS mS Note: 5. Parameter is guaranteed by design and characterization. Not 100% tested in production. 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 6 of 15 ASM5P2304A September 2005 rev 1.4 Operating Conditions for ASM5I2304A Industrial Temperature Devices Parameter Description Min Max Unit VDD Supply Voltage 3.0 3.6 V TA Operating Temperature (Ambient Temperature) -40 85 C CL Load Capacitance, from 15MHz to 100MHz 30 pF CL Load Capacitance, from 100MHz to 133MHz 15 pF CIN Input Capacitance 7 pF Max Unit 0.8 V 6 Note: 6. Applies to both Ref Clock and FBK. Electrical Characteristics for ASM5I2304A Industrial Temperature Devices Parameter Description Test Conditions Min VIL Input LOW Voltage VIH Input HIGH Voltage IIL Input LOW Current VIN = 0V 50.0 <A IIH Input HIGH Current VIN = VDD 100.0 <A 0.4 V VOL Output LOW Voltage VOH Output HIGH Voltage 2.0 7 IOL = 8mA (-1, -2) IOH = 12mA (-1H, -2H) 7 IOL = -8mA (-1, -2) IOH = -12mA (-1H, -2H) Unloaded outputs 100MHz REF, Select inputs at VDD or GND IDD Supply Current Unloaded outputs, 66MHz REF (-1, -2) Unloaded outputs, 33MHz REF (-1, -2) V 2.4 V 45.0 35.0 mA 20.0 Note: 7. Parameter is guaranteed by design and characterization. Not 100% tested in production. 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 7 of 15 ASM5P2304A September 2005 rev 1.4 Switching Characteristics for ASM5I2304A Industrial Temperature Devices All parameters are specified with loaded outputs Parameter Description Test Conditions Min Typ Max Unit 1/t1 Output Frequency 30pF load, -1H, -2H devices 15 133 MHz 1/t1 Output Frequency 15pF load, -1 and -2 devices 15 133 MHz Duty Cycle8 = (t2 / t1) * 100 (-1, -2, -1H, -2H) Measured at 1.4V, FOUT = <66.66MHz 30pF load 40.0 50.0 60.0 % Duty Cycle8= (t2 / t1) * 100 (-1, -2, -1H, -2H) Measured at 1.4V, FOUT = <50 MHz 15pF load 45.0 50.0 55.0 % t3 Output Rise Time8 (-1, -2) Measured between 0.8V and 2.0V 30pF load 2.50 nS t3 Output Rise Time8 (-1, -2) Measured between 0.8V and 2.0V 15pF load 1.50 nS 8 t3 Output Rise Time (-1H, -2H) Measured between 0.8V and 2.0V 30pF load 1.50 nS t4 Output Fall Time8 (-1, -2) Measured between 2.0V and 0.8V 30pF load 2.50 nS t4 Output Fall Time8 (-1, -2) Measured between 2.0V and 0.8V 15pF load 1.50 nS t4 Output Fall Time8 (-1H, -2H) Measured between 2.0V and 0.8V 30pF load 1.25 nS Output-to-output skew on same bank (-1, -2)8 All outputs equally loaded 200 Output-to-output skew (-1H, -2H) All outputs equally loaded 200 Output bank A -to- output bank B skew (-1, -2H) All outputs equally loaded 200 Output bank A -to- output bank B skew (-2) All outputs equally loaded 400 t5 8 pS t6 Delay, REF Rising Edge to FBK Rising Edge Measured at VDD /2 0 250 pS t7 Device-to-Device Skew8 Measured at VDD/2 on the FBK pins of the device 0 500 pS t8 Output Slew Rate8 Measured between 0.8V and 2.0V using Test Circuit #2 tJ tJ tLOCK Cycle-to-cycle jitter 8 (-1, -1H, -2H) Cycle-to-cycle jitter8 (-2) PLL Lock Time8 1 V/nS Measured at 66.67MHz, loaded outputs, 15pF load 180 Measured at 66.67MHz, loaded outputs, 30pF load 200 Measured at 25MHz, loaded outputs, 15pF load 100 Measured at 66.67MHz, loaded outputs, 30pF load 400 Measured at 66.67MHz, loaded outputs, 15pF load 380 Stable power supply, valid clock presented on REF and FBK pins 1.0 pS pS mS Note: 8. Parameter is guaranteed by design and characterization. Not 100% tested in production. 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 8 of 15 ASM5P2304A September 2005 rev 1.4 Switching Waveforms Duty Cycle Timing t1 t2 1.4 V 1.4 V 1.4 V All Outputs Rise/Fall Time OUTPUT 2.0 V 0.8 V 2.0 V 0.8 V 3.3 V 0V t4 t3 Output - Output Skew 1.4 V OUTPUT1 1.4 V OUTPUT2 t 5 Input - Output Propagation Delay VDD /2 INPUT VDD /2 OUTPUT t6 Device - Device Skew VDD /2 CLKOUT, Device 1 CLKOUT, Device 2 VDD /2 t7 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 9 of 15 ASM5P2304A September 2005 rev 1.4 Test Circuits TEST CIRCUIT # 2 TEST CIRCUIT # 1 VDD VDD CLKOUT 0.1uF CLOAD VDD 0.1uF 0.1uF OUTPUT GND GND 1KO OUTPUT 1KO VDD 0.1uF GND GND For parameter t8 (output skew rate) on -1H devices 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 10 of 15 10pF ASM5P2304A September 2005 rev 1.4 Package Information 8-lead (150-mil) SOIC Package H E D A2 A A1 D C e L B Dimensions Symbol Inches Min Max Millimeters Min Max A1 0.004 0.010 0.10 0.25 A 0.053 0.069 1.35 1.75 A2 0.049 0.059 1.25 1.50 B 0.012 0.020 0.31 0.51 C 0.007 0.010 0.18 0.25 D 0.193 BSC 4.90 BSC E 0.154 BSC 3.91 BSC e 0.050 BSC 1.27 BSC H 0.236 BSC 6.00 BSC L 0.016 0.050 0.41 1.27 Q 0 8 0 8 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 11 of 15 ASM5P2304A September 2005 rev 1.4 Ordering Codes Ordering Code Marking Package Type Operating Range ASM5P2304A-1-08-SR 5P2304A-1 8-pin 150-mil SOIC-TAPE & REEL Commercial ASM5P2304A-1-08-ST 5P2304A-1 8-pin 150-mil SOIC-TUBE Commercial ASM5I2304A-1-08-SR 5I2304A-1 8-pin 150-mil SOIC-TAPE & REEL Industrial ASM5I2304A-1-08-ST 5I2304A-1 8-pin 150-mil SOIC-TUBE Industrial ASM5P2304A-1H-08-SR 5P2304A-1H 8-pin 150-mil SOIC-TAPE & REEL Commercial ASM5P2304A-1H-08-ST 5P2304A-1H 8-pin 150-mil SOIC-TUBE Commercial ASM5I2304A-1H-08-SR 5I2304A-1H 8-pin 150-mil SOIC-TAPE & REEL Industrial ASM5I2304A-1H-08-ST 5I2304A-1H 8-pin 150-mil SOIC-TUBE Industrial ASM5P2304A-2-08-SR 5P2304A-2 8-pin 150-mil SOIC-TAPE & REEL Commercial ASM5P2304A-2-08-ST 5P2304A-2 8-pin 150-mil SOIC-TUBE Commercial ASM5I2304A-2-08-SR 5I2304A-2 8-pin 150-mil SOIC-TAPE & REEL Industrial ASM5I2304A-2-08-ST 5I2304A-2 8-pin 150-mil SOIC-TUBE Industrial ASM5P2304A-2H-08-SR 5P2304A-2H 8-pin 150-mil SOIC-TAPE & REEL Commercial ASM5P2304A-2H-08-ST 5P2304A-2H 8-pin 150-mil SOIC-TUBE Commercial ASM5I2304A-2H-08-SR 5I2304A-2H 8-pin 150-mil SOIC-TAPE & REEL Industrial ASM5I2304A-2H-08-ST 5I2304A-2H 8-pin 150-mil SOIC-TUBE Industrial ASM5P2304AF-1-08-SR 5P2304AF-1 8-pin 150-mil SOIC-TAPE & REEL, Pb free Commercial ASM5P2304AF-1-08-ST 5P2304AF-1 8-pin 150-mil SOIC-TUBE, Pb free Commercial ASM5I2304AF-1-08-SR 5I2304AF-1 8-pin 150-mil SOIC-TAPE & REEL, Pb free Industrial ASM5I2304AF-1-08-ST 5I2304AF-1 8-pin 150-mil SOIC-TUBE, Pb free Industrial 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 12 of 15 ASM5P2304A September 2005 rev 1.4 Ordering Codes (Contd...) Ordering Code Marking Package Type Operating Range ASM5P2304AF-1H-08-SR 5P2304AF-1H 8-pin 150-mil SOIC-TAPE & REEL, Pb free Commercial ASM5P2304AF-1H-08-ST 5P2304AF-1H 8-pin 150-mil SOIC-TUBE, Pb free Commercial ASM5I2304AF-1H-08-SR 5I2304AF-1H 8-pin 150-mil SOIC-TAPE & REEL, Pb free Industrial ASM5I2304AF-1H-08-ST 5I2304AF-1H 8-pin 150-mil SOIC-TUBE, Pb free Industrial ASM5P2304AF-2-08-SR 5P2304AF-2 8-pin 150-mil SOIC-TAPE & REEL, Pb free Commercial ASM5P2304AF-2-08-ST 5P2304AF-2 8-pin 150-mil SOIC-TUBE, Pb free, Pb free Commercial ASM5I2304AF-2-08-SR 5I2304AF-2 8-pin 150-mil SOIC-TAPE & REEL, Pb free Industrial ASM5I2304AF-2-08-ST 5I2304AF-2 8-pin 150-mil SOIC-TUBE, Pb free Industrial ASM5P2304AF-2H-08-SR 5P2304AF-2H 8-pin 150-mil SOIC-TAPE & REEL, Pb free Commercial ASM5P2304AF-2H-08-ST 5P2304AF-2H 8-pin 150-mil SOIC-TUBE, Pb free Commercial ASM5I2304AF-2H-08-SR 5I2304AF-2H 8-pin 150-mil SOIC-TAPE & REEL, Pb free Industrial ASM5I2304AF-2H-08-ST 5I2304AF-2H 8-pin 150-mil SOIC-TUBE, Pb free Industrial ASM5P2304AG-1-08-SR 5P2304AG-1 8-pin 150-mil SOIC-TAPE & REEL, Green Commercial ASM5P2304AG-1-08-ST 5P2304AG-1 8-pin 150-mil SOIC-TUBE, Green Commercial ASM5I2304AG-1-08-SR 5I2304AG-1 8-pin 150-mil SOIC-TAPE & REEL, Green Industrial ASM5I2304AG-1-08-ST 5I2304AG-1 8-pin 150-mil SOIC-TUBE, Green Industrial ASM5P2304AG-1H-08-SR 5P2304AG-1H 8-pin 150-mil SOIC-TAPE & REEL, Green Commercial ASM5P2304AG-1H-08-ST 5P2304AG-1H 8-pin 150-mil SOIC-TUBE, Green Commercial ASM5I2304AG-1H-08-SR 5I2304AG-1H 8-pin 150-mil SOIC-TAPE & REEL, Green Industrial ASM5I2304AG-1H-08-ST 5I2304AG-1H 8-pin 150-mil SOIC-TUBE, Green Industrial ASM5P2304AG-2-08-SR 5P2304AG-2 8-pin 150-mil SOIC-TAPE & REEL, Green Commercial 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 13 of 15 ASM5P2304A September 2005 rev 1.4 Ordering Codes (Contd...) Ordering Code Marking Package Type Operating Range ASM5P2304AG-2-08-ST 5P2304AG-2 8-pin 150-mil SOIC-TUBE, Green Commercial ASM5I2304AG-2-08-SR 5I2304AG-2 8-pin 150-mil SOIC-TAPE & REEL, Green Industrial ASM5I2304AG-2-08-ST 5I2304AG-2 8-pin 150-mil SOIC-TUBE, Green Industrial ASM5P2304AG-2H-08-SR 5P2304AG-2H 8-pin 150-mil SOIC-TAPE & REEL, Green Commercial ASM5P2304AG-2H-08-ST 5P2304AG-2H 8-pin 150-mil SOIC-TUBE, Green Commercial ASM5I2304AG-2H-08-SR 5I2304AG-2H 8-pin 150-mil SOIC-TAPE & REEL, Green Industrial ASM5I2304AG-2H-08-ST 5I2304AG-2H 8-pin 150-mil SOIC-TUBE, Green Industrial Device Ordering Information A S M 5 P 2 3 0 4 A F - 0 8 - S R R = Tape & reel, T = Tube or Tray O = SOT S = SOIC T = TSSOP A = SSOP V = TVSOP B = BGA Q = QFN U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP X = SC-70 DEVICE PIN COUNT F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE PART NUMBER X= Automotive I= Industrial P or n/c = Commercial (-40C to +125C) (-40C to +85C) (0C to +70C) 1= 2= 3= 4= 5= Reserved Non PLL based EMI Reduction DDR support products STD Zero Delay Buffer 6= 7= 8= 9= 0= Power Management Power Management Power Management Hi Performance Reserved ALLIANCE SEMICONDUCTOR MIXED SIGNAL PRODUCT Licensed under US patent #5,488,627, #6,646,463 and #5,631,920. 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 14 of 15 ASM5P2304A September 2005 rev 1.4 Copyright (c) Alliance Semiconductor All Rights Reserved Part Number: ASM5P2304A Document Version: 1.4 Alliance Semiconductor Corporation 2575 Augustine Drive, Santa Clara, CA 95054 Tel# 408-855-4900 Fax: 408-855-4999 www.alsc.com Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Alliance Semiconductor, dated 11-11-2003 (c) Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Alliance reserves the right to make changes to this document and its products at any time without notice. Alliance assumes no responsibility for any errors that may appear in this document. The data contained herein represents Alliance's best data and/or estimates at the time of issuance. Alliance reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. 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Alliance does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of Alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use. 3.3V Zero Delay Buffer Notice: The information in this document is subject to change without notice. 15 of 15