HANBit
HMS25632M8G/Z8
H A N
SRAM MODULE 1Mbyte (256K x 32-Bit)
B I T
HMS25632M8, HMS25632Z8
Part No.
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
PIN ASSIGNMENT
Part Identification
1
3
5
7
Vss
PD1
PD0
DQ0
DQ1
DQ2
DQ3 10
Vcc 12
A7 14
A8 16
A9 18
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
2
4
6
8
-HMS25632M8G : 64Pin SIMM Design, Gold Plate Lead
-HMS25632Z8 : 64Pin ZIP Design
→ Pin-Compatible with the HMS25632M8G
Access times: 8, 10, 12, 15and 20ns
High-density 1MByte design
DQ8
DQ9
DQ10
DQ11
A0
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
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
A15
/ CE2
/ CE4
A17
/ OE
DQ24
DQ25
DQ26
DQ27
A3
A4
A5
Vcc
A6
OPTIONS
Timing
MARKING
8ns access
10ns access
12ns access
15ns access
20ns access
Packages
- 8
-10
-12
-15
-20
DQ28
DQ29
DQ30
DQ31
64
Vss
64-pin SIMM
64-pin ZIP
M
Z
PD0 = Vss
PD1 = Vss
ZIP
TOP VIEW
1
HANBit Electronics Co.,Ltd.