HANBit

HMS25632M8G/Z8

HANBit Electronics Co.,Ltd.

1

GENERAL DESCRIPTION

The HMS25632M8G/Z8 is a high-speed static random access memory (SRAM) module containing 262,144

words organized in a x32-bit configuration. The module consists of eight 256K x 4 SRAMs mounted on a 64-pin,

double-sided, FR4-printed circuit board.

PD0 and PD1 identify the module’s density allowing interchangeable use of alternate density, industry- standard

modules. Four chip enable inputs, (/CE1, /CE2, /CE3 and /CE4) are used to enable the module’s 4 bytes

independently. Output enable (/OE) and write enable (/WE) can set the memory input and output.

Data is written into the SRAM memory when write enable (/WE) and chip enable (/CE) inputs are both LOW.

Reading is accomplished when /WE remains HIGH and /CE and output enable (/OE) are LOW.

For reliability, this SRAM module is designed as multiple power and ground pin. All module components may be

powered from a single +5V DC power supply and all inputs and outputs are fully TTL-compatible.

FEATURES

Š Part Identification

-HMS25632M8G : 64Pin SIMM Design, Gold Plate Lead

-HMS25632Z8 : 64Pin ZIP Design

→ Pin-Compatible with the HMS25632M8G

Š Access times: 8, 10, 12, 15and 20ns

Š High-density 1MByte design

Š High-reliability, high-speed design

Š Single + 5V ±0.5V power supply

Š Easy memory expansion with /CE and /OE functions

Š All inputs and outputs are TTL-compatible

Š Industry-standard pinout

OPTIONS

MARKING

Š Timing

8ns access

- 8

10ns access

-10

12ns access

-12

15ns access

-15

20ns access

-20

Š Packages

64-pin SIMM

M

64-pin ZIP

Z

PD0 = Vss

PD1 = Vss

PIN ASSIGNMENT

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

35

37

39

41

43

45

47

49

51

53

55

57

59

61

63

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

42

44

46

48

50

52

54

56

58

60

62

64

ZIP

TOP VIEW

Vss

PD1

DQ8

DQ9

DQ10

DQ11

A0

A1

A2

DQ12

DQ13

DQ14

DQ15

Vss

A15

/CE2

/CE4

A17

/OE

DQ24

DQ25

DQ26

DQ27

A3

A4

A5

Vcc

A6

DQ28

DQ29

DQ30

DQ31

PD0

DQ0

DQ1

DQ2

DQ3

Vcc

A7

A8

A9

DQ4

DQ5

DQ6

DQ7

/WE

A14

/CE1

/CE3

A16

Vss

DQ16

DQ17

DQ18

DQ19

A10

A11

A12

A13

DQ20

DQ21

DQ22

DQ23

Vss

SRAM MODULE 1Mbyte (256K x 32-Bit)

Part No.

HMS25632M8, HMS25632Z8

H A N

B I T