HANBit
HMS1M32M8A/Z8A
H A N
SRAM MODULE 4Mbyte(1M x 32-Bit) , 64-Pin SIMM Design
B I T
HMS1M32M8A, HMS1M32Z8A
Part No.
GENERAL DESCRIPTION
The HMS1M32M8A 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 64-pin, double-
sided, FR4-printed circuit board.
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
PIN ASSIGNMENT
Access times : 10, 12, 15, 17 and 20ns
1
3
5
7
Vss
A19
A18
DQ0
DQ1
DQ2
DQ3 10
Vcc 12
A7 14
A8 16
A9 18
2
4
6
8
High-density 4MByte design
DQ8
DQ9
DQ10
DQ11
A0
High-reliability, high-speed design
Single + 5V ±0.5V power supply
Easy memory expansion with /CE and /OE functions
All inputs and outputs are TTL-compatible
Industry-standard pinout
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
A1
A2
DQ12
DQ13
DQ14
DQ15
Vss
DQ4 20
DQ5 22
DQ6 24
DQ7 26
/ WE 28
A14 30
/ CE1 32
/ CE3 34
A16 36
Vss 38
DQ16 40
DQ17 42
DQ18 44
DQ19 46
A10 48
A11 50
A12 52
A13 54
DQ20 56
DQ21 58
DQ22 60
DQ23 62
Vss 64
Part identification
- HMS1M32M8A : 64Pin SIMM Design
- HMS1M32Z8A : 64Pin ZIP Design
→ Pin-Compatible with the HMS1M32M8A
A15
/ CE2
/ CE4
A17
/ OE
DQ24
DQ25
DQ26
DQ27
A3
A4
A5
Vcc
A6
OPTIONS
Timing
MARKING
10ns access
12ns access
15ns access
17ns access
20ns access
Packages
-10
-12
-15
-17
-20
DQ28
DQ29
DQ30
DQ31
ZIP
TOP VIEW
64-pin SIMM
64-pin ZIP
M
Z
1
HANBit Electronics Co.,Ltd.