KM68257C-12 SAMSUNG [Samsung semiconductor], KM68257C-12 Datasheet - Page 2

• Manufacturer Part Number: KM68257C-12
• Description: 32Kx8 Bit High Speed Static RAM(5V Operating(, Evolutionary Pin out. Operated at Commercial Temperature Range.
• Manufacturer: SAMSUNG [Samsung semiconductor]

A
A
A
A
A
A
A
A
A
FUNCTIONAL BLOCK DIAGRAM
3
4
5
6
7
8
12
13
14
CS
WE
OE
32K x 8 Bit High-Speed CMOS Static RAM
KM68257C/CL
FEATURES
I/O
¡Ü
¡Ü
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¡Ü
¡Ü
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¡Ü
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Operating KM68257C/CL - 12 : 165
- No Clock or Refresh required
Fast Access Time 12, 15, 20
Single 5.0V 10% Power Supply
TTL Compatible Inputs and Outputs
I/O Compatible with 3.3V Device
Fully Static Operation
Three State Outputs
Low Data Retention Voltage : 2V(Min.)- L-ver. only
Low Power Dissipation
Standard Pin Configuration
Standby (TTL)
1
~ I/O
8
(CMOS) : 2
KM68257C/CLP : 28-DIP-300
KM68257C/CLJ : 28-SOJ-300
KM68257C/CLTG : 28-TSOP1-0813, 4F
KM68257C/CL - 15 : 150
KM68257C/CL - 20 : 140
Clk Gen.
: 40
Cont.
Gen.
Data
0.1
CLK
§Ì
§Ì
§Ì
(Max.)
(Max.)
(Max.)- L-ver. only
§À
A
0
(Max.)
Pre-Charge-Circuit
A
§Ì
§Ì
1
§Ì
Column Select
64x8 Columns
Memory Array
(Max.)
(Max.)
512 Rows
I/O Circuit
(Max.)
A
2
A
9
A
10
A
11
- 2 -
PIN CONFIGURATION
PIN FUNCTION
GENERAL DESCRIPTION
The KM68257C is a 262,144-bit high-speed Static Random
Access Memory organized as 32,768 words by 8 bits. The
KM68257C uses 8 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 KM68257C is packaged in
a 300 mil 28-pin plastic DIP, SOJ or TSOP1 forward.
I/O
Pin Name
A
A11
A13
A14
A12
Vcc
WE
OE
A9
A8
A7
A6
A5
A4
A3
0
1
V
V
WE
CS
OE
- A
~ I/O
CC
SS
14
8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
I/O1
I/O2
I/O3
A14
A12
Vss
A7
A6
A5
A4
A3
A2
A1
A0
10
11
12
13
14
Address Inputs
Write Enable
Chip Select
Output Enable
Data Inputs/Outputs
Power(+5.0V)
Ground
1
2
3
4
5
6
7
8
9
TSOP1
SOJ/DIP
(Top View)
Pin Function
PRELIMINARY
CMOS SRAM
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Vcc
WE
A13
A8
A9
A11
OE
A10
CS
I/O8
I/O7
I/O6
I/O5
I/O4
February-1996
A10
CS
I/O8
I/O7
I/O6
I/O5
I/O4
Vss
I/O3
I/O2
I/O1
A0
A1
A2
Rev 3.0