IS42S16128

Integrated Silicon Solution, Inc. — 1-800-379-4774

1

Rev. A

03/13/00

ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any

errors which may appear in this publication. © Copyright 2000, Integrated Silicon Solution, Inc.

FEATURES

• Clock frequency: 125 MHz, 100 MHz, 83 MHz

• Two banks can be operated simultaneously and

independently

• Single 3.3V power supply

• LVTTL interface

• Programmable burst length

– (1, 2, 4, 8, full page)

• Programmable burst sequence:

Sequential/Interleave

• Auto refresh, self refresh

• 1K refresh cycles every 16 ms

• Random column address every clock cycle

• Programmable

CAS latency (2, 3 clocks)

• Burst read/write and burst read/single write

operations capability

• Byte controlled by LDQM and UDQM

• Package 400-mil 50-pin TSOP II

DESCRIPTION

ISSI's 4Mb Synchronous DRAM IS42S16128 is organized as

a 131072-word x 16-bit x 2-bank for improved performance.

The synchronous DRAMs achieve high-speed data transfer

using pipeline architecture. All inputs and outputs signals refer

to the rising edge of the clock input.

128K Words x 16 Bits x 2 Banks (4-MBIT)

SYNCHRONOUS DYNAMIC RAM

PIN CONFIGURATIONS

50-Pin TSOP (Type II)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

50

49

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

VCC

I/O0

I/O1

GNDQ

I/O2

I/O3

VCCQ

I/O4

I/O5

GNDQ

I/O6

I/O7

VCCQ

LDQM

WE

CAS

RAS

CS

A9

A8

A0

A1

A2

A3

VCC

GND

I/O15

I/O14

GNDQ

I/O13

I/O12

VCCQ

I/O11

I/O10

GNDQ

I/O9

I/O8

VCCQ

NC

UDQM

CLK

CKE

NC

NC

NC

A7

A6

A5

A4

GND

FEBRUARY 2000

PIN DESCRIPTIONS

A0-A9

Address Input

A0-A8

Row Address Input

A9

Bank Select Address

A0-A7

Column Address Input

I/O0 to I/O15

Data I/O

CLK

System Clock Input

CKE

Clock Enable

CS

Chip Select

RAS

Row Address Strobe Command

CAS

Column Address Strobe Command

WE

Write Enable

LDQM

Lower Bye, Input/Output Mask

UDQM

Upper Bye, Input/Output Mask

Vcc

Power

GND

Ground

VccQ

Power Supply for I/O Pin

GNDQ

Ground for I/O Pin

NC

No Connection

ORDERING INFORMATION

Commercial Range: 0

⋅⋅⋅⋅⋅C to 70⋅⋅⋅⋅⋅C

Frequency

Speed (ns)

Order Part No.

Package

125 MHz

8

IS42S16128-8T

400-mil TSOP II

100 MHz

10

IS42S16128-10T

400-mil TSOP II

83 MHz

12

IS42S16128-12T

400-mil TSOP II