km641001a Samsung Semiconductor, Inc., km641001a Datasheet - Page 2

• Manufacturer Part Number: km641001a
• Description: 256kx 4 High Speed Static Ram 5v Operating , Evolutionary Pin Out Operated At Commercial Temperature Range
• Manufacturer: Samsung Semiconductor, Inc.

256K x 4 Bit (with OE)High-Speed CMOS Static RAM
FEATURES
FUNCTIONAL BLOCK DIAGRAM
• Fast Access Time 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
• Standard Pin Configuration
KM641001A
Operating KM641001A - 15 : 125mA(Max.)
- No Clock or Refresh required
CS
WE
OE
A
Standby (TTL)
A
A
A
A
A
A
A
A
I/O
10
2
3
4
5
6
7
8
9
1
~ I/O
(CMOS) : 8mA(Max.)
4
KM641001A - 20 : 120mA(Max.)
KM641001AJ : 28-SOJ-400A
Clk Gen.
: 25mA(Max.)
Cont.
Data
Gen.
CLK
A
0
A
Pre-Charge Circuit
1
512x4 Columns
A
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 KM641001A is a 1,048,576-bit high-speed Static Random
Access Memory organized as 262,144 words by 4 bits. The
KM641001A 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 KM641001A is packaged
in a 400 mil 28-pin plastic SOJ.
PIN CONFIGURATION
Pin Name
I/O
A
0
1
WE
V
V
N.C
CS
OE
Vss
A
- A
CS
OE
~ I/O
CC
A
A
A
A
A
A
A
A
A
A
SS
10
0
1
2
3
4
5
6
7
8
9
17
4
10
11
12
13
14
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
Pin Function
(Top View)
CMOS SRAM
PRELIMINARY
28
27
26
25
24
23
22
21
20
19
18
17
16
15
February 1998
N.C
I/O
I/O
I/O
I/O
Vcc
A
A
A
A
A
A
A
WE
17
16
15
14
13
12
11
4
3
2
1
Rev 5.0