Datasheet > HMS25632M8B

HMS25632M8B

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
HANBIT		静态存储器
页数	文件大小	规格书
9页	233K
描述
SRAM MODULE 1Mbyte (256K x 32-Bit) , 72-Pin

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HMS25632M8B 数据手册

HANBit

HMS25632M8B/Z8B

H A N

SRAM MODULE 1Mbyte (256K x 32-Bit) , 72-Pin

B I T

HMS25632M8B, HMS25632Z8B

Part No.

GENERAL DESCRIPTION

The HMS25632M8B 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 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 +5V DC power supply and all inputs and outputs are fully TTL-compatible.

PIN ASSIGNMENT

FEATURES

Access times : 8, 10,12, 15 and 20ns

PD2

PD3

Vss

PD0

PD1

DQ0

DQ8

DQ1

DQ9

DQ2

DQ10

DQ3

DQ11

Vcc

/ CE4 37

/ CE3 38

A17 39

A16 40

/ OE 41

Vss 42

DQ24 43

DQ16 44

DQ25 45

DQ17 46

DQ26 47

DQ18 48

DQ27 49

DQ19 50

A3 51

A10 52

A4 53

A11 54

A5 55

A12 56

Vcc 57

A13 58

A6 59

DQ20 60

DQ28 61

DQ21 62

DQ29 63

DQ22 64

DQ30 65

DQ23 66

DQ31 67

Vss 68

NC 69

NC 70

NC 71

NC 72

High-density 1MByte design

High-reliability high-speed design

Single + 5V ±0.5V power supply

Easy memory expansion /CE and /OE functions

All inputs and outputs are TTL-compatible

Industry-standard pinout

FR4-PCB design

Part identification

- HMS25632M8B : 72-pin SIMM design

- HMS25632Z8B : 72-pin ZIP design

→ Pin-compatible with the HMS25632M8B

DQ12

DQ4

DQ13

DQ5

DQ14

DQ6

DQ15

DQ7

Vss

/ WE

A15

A14

/ CE2

/ CE1

OPTIONS

Timing

MARKING

10ns access

12ns access

15ns access

20ns access

Packages

-10

-12

-15

-20

PD0 = Vss

PD1 = Vss

PD2 = Open

PD3 = Open

72-pin SIMM

72-pin ZIP

7 2 -Pin

TOP VIEW

SIMM

HANBit Electronics Co.,Ltd.

12 3 4 5 6 7...9

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