HMS1M32M8L Datasheet, PDF (1/7 Pages) Hanbit Electronics Co.,Ltd – SRAM MODULE 4Mbyte(1Mx32Bit) ,LOW POWER,72Pin SIMM,5V

HANBit
HMS1M32M8L
SRAM MODULE 4Mbyte(1Mx32Bit) ,LOW POWER,72Pin SIMM,5V
Part No. HMS1M32M8L, HMS1M32Z8L
GENERAL DESCRIPTION
The HMS1M32M8L is a static random access memory (SRAM) module containing 1,048,576 bits organized in a x32-bit
configuration. The module consists of eight 512K x 8 SRAMs mounted on a 72-pin, double-sided, FR4-printed circuit board.
The HMS1M32M8L also support low data retention voltage for battery back-up operations with low data retention current. Eight
chip enable inputs, (/CE_UU1, /CE_UM1, /CE_LM1, /CE_LL1, /CE_UU2, /CE_UM2, /CE_LM2, /CE_LL2) are used to enable
the module’s 4M 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 Part identification
- HMS1M32M8L : SIMM design
- HMS1M32Z8L : ZIP design
The both are Pin to Pin Compatible
w Access times : 55ns, 70ns
w High-density 4MByte design
w High-reliability, low-power design
w Single + 5V ±0.5V power supply
w Low data retention voltage : 2V(min)
w Three state output and TTL-compatible
w FR4-PCB design
w Low profile 72-Pin SIMM
OPTIONS
w Timing
55ns access
70ns access
w Packages
72-pin SIMM
72-pin ZIP
MARKING
-55
-70
M
Z
PIN ASSIGNMENT
PIN SYMBOL PIN SYMBOL PIN SYMBOL
1
Vss
25
Vcc
49
DQ17
2
A3
26
DQ8
50
DQ18
3
A2
27
DQ9
51
DQ22
4
A1
28
DQ10
52
DQ21
5
A0
29 /CE_LM2 53
DQ20
6
Vcc
30
Vcc
54
DQ19
7
A11
31 /CE_LM1 55
Vcc
8
/OE
32
DQ15
56
A14
9
A10
33
DQ14
57
A12
10
Vcc
34
DQ13
58
A7
11 /CE_LL2 35
DQ12
59
Vcc
12 /CE_LL1 36
DQ11
60
A8
13
DQ7
37
A18
61
A9
14
DQ0
38
A16
62
DQ24
15
DQ1
39
Vss
63
DQ25
16
DQ2
40
A6
64
DQ26
17
DQ6
41
Vcc
65 /CE_UU2
18
DQ5
42
A5
66 /CE_UU1
19
DQ4
43
A4
67
DQ31
20
DQ3
44
Vcc
68
DQ30
21
A15
45 /CE_UM2 69
DQ29
22
A17
46 /CE_UM1 70
DQ28
23
/WE
47
DQ23
71
DQ27
24
A13
48
DQ16
72
Vss
SIMM
TOP VIEW
URL: www.hbe.co.kr
Rev. 1.0 (September / 2002)
1
HANBit Electronics Co.,Ltd.