HANBit

HMS51232M4G

1

HANBit Electronics Co.,Ltd.

PD0 = Open

PD1 = Open

PD2 = Vss

PD3 = Open

72-Pin SIMM

TOP VIEW

GENERAL DESCRIPTION

The HMS51232M4GG 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 four 512K x 8 SRAMs mounted on a 72-pin, single-sided, FR4-printed circuit board.

PD0 to PD3 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

w Access times : 10, 12, 15, 17 and 20

w High-density 2Mbyte design

w High-reliability, high-speed design

w Single + 5V

±0.5V power supply

w Easy memory expansion /CE and /OE functions

w All inputs and outputs are TTL-compatible

w Industry-standard pinout

w FR4-PCB design

w Part Identification

- HMS51232M4G : SIMM design

OPTIONS

MARKING

w Timing

10ns access

-10

12ns access

-12

15ns access

-15

17ns access

-17

20ns access

-20

w Packages

72-pin SIMM

M

PIN

SYMBOL

PIN

SYMBOL

PIN

SYMBOL

1

NC

25

DQ13

49

DQ27

2

NC

26

DQ5

50

DQ19

3

PD2

27

DQ14

51

A3

4

PD3

28

DQ6

52

A10

5

Vss

29

DQ15

53

A4

6

PD0

30

DQ7

54

A11

7

PD1

31

Vss

55

A5

8

DQ0

32

/WE

56

A12

9

DQ8

33

A15

57

Vcc

10

DQ1

34

A14

58

A13

11

DQ9

35

/CE2

59

A6

12

DQ2

36

/CE1

60

DQ20

13

DQ10

37

/CE4

61

DQ28

14

DQ3

38

/CE3

62

DQ21

15

DQ11

39

A17

63

DQ29

16

Vcc

40

A16

64

DQ22

17

A0

41

/OE

65

DQ30

18

A7

42

Vss

66

DQ23

19

A1

43

DQ24

67

DQ31

20

A8

44

DQ16

68

Vss

21

A2

45

DQ25

69

A18

22

A9

46

DQ17

70

NC

23

DQ12

47

DQ26

71

NC

24

DQ4

48

DQ18

72

NC

PIN ASSIGNMENT

SRAM MODULE 2Mbyte (512K x 32-Bit), 72PIN SIMM, 5V

Part No.

HMS51232M4G