HANBit

HMS1M32M8V

HANBit Electronics Co.,Ltd.

GENERAL DESCRIPTION

The HMS1M32M8V is a high-speed static random access memory (SRAM) module containing 1,048,576 words

organized in a x32-bit configuration. The module consists of eight 1M x 4 SRAMs mounted on a 72-pin, double-

sided, FR4-printed circuit board.

PD0 to PD3 identify the module’s density allowing interchangeable use of alternate density, industry- standard

modules. Eight 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 +3.3V DC power supply and all inputs and outputs are fully LVTTL-compatible.

FEATURES

Š Part identification

- HMS1M32M8V : SIMM design

- HMS1M32Z8V : ZIP design

→ Pin-Compatible with the HMS1M32M8V

Š Fast access times : 10, 12ns and 15ns

Š High-density 4MByte design

Š High-reliability high-speed design

Š Single + 3.3V ±0.3V power supply

Š Easy memory expansion /CE and /OE functions

Š All inputs and outputs are LVTTL-compatible

Š Industry-standard pinout

Š FR4-PCB design

Š Low power Dissipation

OPTIONS

MARKING

Š Timing

10

-10

12

-12

15

-15

Š Packages

72-pin SIMM

M

PIN ASSIGNMENT

PD0 = Vss

PD1 = Open

PD2 = Vss

PD3 = Open

NC

NC

PD2

PD3

Vss

PD0

PD1

DQ0

DQ8

DQ1

DQ9

DQ2

DQ10

DQ3

DQ11

Vcc

A0

A7

A1

A8

A2

A9

DQ12

DQ4

DQ13

DQ5

DQ14

DQ6

DQ15

DQ7

Vss

/WE

A15

A14

/CE2

/CE1

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

26

27

28

29

30

31

32

33

34

35

36

/CE4

/CE3

A17

A16

/OE

Vss

DQ24

DQ16

DQ25

DQ17

DQ26

DQ18

DQ27

DQ19

A3

A10

A4

A11

A5

A12

Vcc

A13

A6

DQ20

DQ28

DQ21

DQ29

DQ22

DQ30

DQ23

DQ31

Vss

A18

A19

NC

NC

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

SIMM

TOP VIEW

SRAM MODULE 4Mbyte(1M x 32-Bit) 3.3V

Part No.

HMS1M32M8V, HMS1M32Z8V

H A N

B I T