ICS9S857 Integrated Circuit Systems, Inc. Preliminary Product Preview Low-Voltage 10-Bit FET BUS Switch With Internal Pulldown Resistors Full DDR solution provided when used with ICSSSTV16857 and ICS93857 Enable signal is SSTL_2 compatible Flow-through architecture optimizes PCB layout Designed for use with 200 Mbit/s Double Data-Rate (DDR) SDRAM applications Switch On-state restance is designed to eliminate series resistor to DDR SDRAM Internal 10W pulldown resistors to ground on B port Internal 50W pullup resistor on Output-Enable (OE#) input Latch-up perfromance exceeds 100 mA per JESD 78, Class II Available in 24 pin TSSOP package Logic Diagram (Positive Logic) A1 2 SW VREF A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 GND 1 2 3 4 5 6 7 8 9 10 11 12 ICS9S857 Pin Configuration Product Features: 24 23 22 21 20 19 18 17 16 15 14 13 VDD OE# B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 24-Pin TSSOP Simplified Shcematic, Each FET Switch 22 B1 RINT A10 11 SW VDD OE# VREF RINT B10 A B 23 1 Function Table INPUT OE# L H 13 (OE#) FUNCTION A port = B port Disconnect 9S857 Rev A 7/31/00 PRODUCT PREVIEW documents contain information on new products in the sampling or preproduction phase of development. Characteristic data and other specifications are subject to change without notice. ICS9S857 Preliminary Product Preview Pin Descriptions PIN NUMBER P I N NA M E TYPE DESCRIPTION 1 VREF OUT 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 A1-A10 IN 12 GND PWR Ground 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, B1-B10 OUT Outputs 23 OE# IN 24 VDD PWR Reference output voltage Inputs Output Enable Power supply (3.6V) Absolute Maximum Ratings SYMBOL PA R A M E T E R CONDITIONS R AT I N G UNIT -0.5 to +4.6 V -50 mA VDD DC supply Voltage IIK DC input clamp current VI DC input voltage range (OE# only)2 VDD + 0.5 V Tstg Storage temperature range -65 to 150 °C -0.5 to 4.6 V VI V I/O < 0 2 DC input voltage (except OE#) Notes: 1. 2. 3. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under " recommended operating conditions' is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. The package thermal impedance is calculated in accordance with JESD 51. Recommended Operating Condidions SYMBOL PA R A M E T E R VDD DC supply Voltage VREF Reference voltage (0.38 x VDD) VIH AC high-level input VIL AC low-level input voltage VIH DC high-level input voltage VIL DC low-level input voltage Tamb Operating free-air temperature range LIMITS MIN TYP MAX UNIT 3 3.3 3.6 V 1.15 1.25 1.35 V VREF+ 350 mV V VREF -350mV VREF+ 180 mV 0 2 V V VREF -180mV V +85 °C ICS9S857 Preliminary Product Preview SYMBOL In Millimeters In Inches COMMON DIMENSIONS COMMON DIMENSIONS MIN MAX MIN MAX A - 1.20 - 0.047 A1 0.05 0.15 .002 .006 A2 0.80 1.05 .032 .041 b 0.17 0.27 .007 .011 c 0.09 0.20 SEE VARIATIONS D .0035 .008 SEE VARIATIONS 6.40 BASIC E E1 4.30 e 0.252 BASIC 4.50 .169 0.50 BASIC L 0.45 0.75 SEE VARIATIONS N .177 0.020 BASIC .018 .030 SEE VARIATIONS α 0° 8° 0° 8° aaa - 0.10 - .004 MIN MAX MIN MAX 20 4.90 5.10 .193 .201 24 6.40 6.60 .252 .260 28 7.70 7.90 .303 .311 30 7.70 7.90 .303 .311 36 9.60 9.80 .378 .386 38 9.60 9.80 .378 .386 44 10.90 11.10 .429 .437 50 12.40 12.60 VARIATIONS D mm. N 4.40 mm. Body, 0.50 mm. pitch TSSOP (0.020 mil) (173 mil) D (inch) .488 .496 MO-153 JEDEC Doc.# 10-0036 7/6/00 Rev B Ordering Information ICS9S857yGT Example: ICS XXXX y G - PPP - T Designation for tape and reel packaging Pattern Number (2 or 3 digit number for parts with ROM code patterns) Package Type G=TSSOP Revision Designator (will not correlate with datasheet revision) Device Type (consists of 3 or 4 digit numbers) Prefix ICS, AV = Standard Device 3 PRODUCT PREVIEW documents contain information on new products in the sampling or preproduction phase of development. Characteristic data and other specifications are subject to change without notice.