km641003a Samsung Semiconductor, Inc., km641003a Datasheet - Page 2

• Manufacturer Part Number: km641003a
• Description: 256kx4 High Speed Static Ram 5v Operating , Revolutionary Pin Out Operated At Commercial And Industrial Temperature Range
• Manufacturer: Samsung Semiconductor, Inc.

KM641003A
256K x 4 Bit (with OE)High-Speed CMOS Static RAM
FUNCTIONAL BLOCK DIAGRAM
FEATURES
• Fast Access Time 12, 15, 20ns(Max.)
• Low Power Dissipation
• Single 5.0V 10% Power Supply
• TTL Compatible Inputs and Outputs
• I/O Compatible with 3.3V Device
• Fully Static Operation
• Three State Outputs
• Center Power/Ground Pin Configuration
• Standard Pin Configuration
A
A
A
A
A
A
A
A
A
CS
WE
OE
0
1
2
3
4
5
6
7
8
Operating KM641003A - 12 : 150mA(Max.)
- No Clock or Refresh required
I/O
Standby (TTL)
1
~I/O
4
(CMOS) : 8mA(Max.)
KM641003A - 15 : 145mA(Max.)
KM641003A - 20 : 140mA(Max.)
KM641003AJ : 32-SOJ-400
Clk Gen.
Cont.
: 25mA(Max.)
Data
Gen.
CLK
A
9
A
10
Pre-Charge Circuit
A
512x4 Columns
Column Select
Memory Array
11
I/O Circuit &
512 Rows
A
12
A
13
A
14
A
15
A
16
A
17
- 2 -
GENERAL DESCRIPTION
PIN FUNCTION
The KM641003A is a 1,048,576-bit high-speed Static Random
Access Memory organized as 262,144 words by 4 bits. The
KM641003A uses 4 common input and output lines and has an
output enable pin which operates faster than address access
time at read cycle. The device is fabricated using SAMSUNG s
advanced CMOS process and designed for high-speed circuit
technology. It is particularly well suited for use in high-density
high-speed system applications. The KM641003A is packaged
in a 400 mil 32-pin plastic SOJ.
PIN CONFIGURATION
Pin Name
I/O
A
0
V
V
N.C
WE
OE
CS
1
- A
~I/O
CC
SS
N.C.
N.C.
I/O
I/O
Vcc
Vss
WE
CS
A
A
A
A
A
A
A
A
17
0
1
2
3
4
5
6
7
1
2
4
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Address Inputs
Write Enable
Chip Select
Output Enable
Data Inputs/Outputs
Power(+5.0V)
Ground
No Connection
SOJ
(Top View)
Pin Function
CMOS SRAM
PRELIMINARY
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
February 1998
N.C.
I/O
I/O
A
A
A
A
A
Vss
Vcc
A
A
A
OE
A
A
17
16
15
14
13
12
11
10
9
8
4
3
Rev 4.0