HANBit
HMS1M32M8V
H A N
SRAM MODULE 4Mbyte(1M x 32-Bit) 3.3V
B I T
HMS1M32M8V, HMS1M32Z8V
Part No.
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.
PIN ASSIGNMENT
FEATURES
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
/ 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
1
2
3
4
5
6
7
8
NC
NC
PD2
PD3
Vss
PD0
PD1
DQ0
DQ8
DQ1
DQ9
DQ2
DQ10
DQ3
DQ11
Vcc
Part identification
- HMS1M32M8V : SIMM design
- HMS1M32Z8V : ZIP design
→ Pin-Compatible with the HMS1M32M8V
Fast access times : 10, 12ns and 15ns
High-density 4MByte design
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
High-reliability high-speed design
Single + 3.3V ±0.3V power supply
Easy memory expansion /CE and /OE functions
All inputs and outputs are LVTTL-compatible
Industry-standard pinout
A0
A7
A1
A8
A2
A9
DQ12
DQ4
DQ13
DQ5
DQ14
DQ6
DQ15
DQ7
Vss
/ WE
A15
A14
/ CE2
/ CE1
FR4-PCB design
Low power Dissipation
OPTIONS
Timing
MARKING
10ns access
12ns access
15ns access
-10
-12
-15
PD0 = Vss
PD1 = Open
PD2 = Vss
PD3 = Open
SIMM
TOP VIEW
Packages
72-pin SIMM
M
HANBit Electronics Co.,Ltd.