Integrated

Circuit

Systems, Inc.

ICS9S857

Preliminary Product Preview

Low-Voltage 10-Bit FET BUS Switch With

Internal Pulldown Resistors

9S857 Rev A 7/31/00

Pin Configuration

24-Pin TSSOP

Product Features:

•

Full DDR solution provided when used with

ICSSSTV16857andICS93857

•

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

VREF

A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

GND

VDD

OE#

B1

B2

B3

B4

B5

B6

B7

B8

B9

B10

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

V

DD

OE#

A1

B1

22

2

13

11

1

23

A10

B10

VREF

R

INT

R

INT

SW

SW

(OE#)

AB

Logic Diagram (Positive Logic)

Simplified Shcematic, Each FET Switch

Function Table

T

U

P

N

I

#

E

O

N

O

I

T

C

N

U

F

L

H

t

r

o

p

B

=

t

r

o

p

A

t

c

e

n

n

o

c

s

i

D

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.