HANBit
HMS25632J2V
SRAM MODULE 1Mbyte (256K x 32-Bit) 3.3V, 68-Pin JLCC Packaging
HMS25632J2V
Part No.
GENERAL DESCRIPTION
The HMS25632J2V is a high-speed static random access memory (SRAM) module containing 262,144 words organized in a
x32-bit configuration. The module consists of two 256K x 16 SRAMs mounted on a 68-pin, double-sided, FR4-printed circuit
board. The HMS25632J2V uses 31 common input and output lines and has an output enable pin which operates faster than
address access time at read cycle. Also it allows that lower and upper byte access by data byte control (/BS0~/BS3). 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.
FEATURES
w Access times : 10, 12 ,15, and 70, 85, 100ns
PIN ASSIGNMENT
w Low Power Dissipation
w High-density 1Mbyte design
w High-reliability, high-speed design
9
8
7
6
5
4
3
2
1
68 67 66 65 64 63 62 61
60
w Single + 3.3V ±0.3V power supply
w Easy memory expansion /CE
and /OE functions
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
DQ17
DQ18
DQ19
Vs s
DQ20
DQ21
DQ22
DQ23
Vcc
DQ24
DQ25
DQ26
DQ27
Vs s
DQ28
DQ29
DQ30
DQ14
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
DQ13
DQ12
Vs s
DQ11
DQ10
DQ9
DQ8
Vcc
DQ7
DQ6
DQ5
DQ4
Vs s
w All inputs and outputs are
LVTTL-compatible
w Industry-standard pinout
w FR4-PCB design
w Low profile 68-pin JLCC
OPTIONS
w Timing
MARKING
DQ3
DQ2
DQ1
10ns access
12ns access
15ns access
-10
-12
-15
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
w Packages
68-pin JLCC
J
JLCC TOP VIEW
PIN FUNCTION
PIN NAME
A0-A17
DQ0-31
/WE
PIN FUNCTION
PIN NAME
/BS0 ~ /BS3
Vcc
PIN FUNCTION
Byte Controls
Power(+3.3V)
Ground
Address Inputs
Data Inputs
Write Enable
Chip Enable
Output Enable
Vss
/CE
N.C
No Connection
/OE
URL: www.hbe.co.kr
1
HANBit ElectronicsCo.,Ltd.
Rev. 1.0 (September / 2002)