W24L257 データシートの表示（PDF） - Winbond
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W24L257 Datasheet PDF : 11 Pages
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W24L257
GENERAL DESCRIPTION
32K × 8 CMOS STATIC RAM
The W24L257 is a normal-speed, very low-power CMOS static RAM organized as 32768 × 8 bits that
operates on a wide voltage range from 3V to 5.5V power supply. This device is manufactured using
Winbond's high performance CMOS technology.
FEATURES
• Low power consumption:
• Access time: 70 nS
• 3.3V/5V power supply
• Fully static operation
• All inputs and outputs directly TTL compatible
• Three-state outputs
• Battery back-up operation capability
• Data retention voltage: 2V (min.)
• Packaged in 330 mil SOP, and standard type
one TSOP (8 mm × 13.4 mm)
PIN CONFIGURATIONS
BLOCK DIAGRAM
A14 1
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
I/O1 11
I/O2 12
I/O3 13
VSS 14
28 VCC
27
WE
26 A13
25 A8
24 A9
23
A11
22 OE
21 A10
20 CS
19 I/O8
18 I/O7
17 I/O6
16 I/O5
15 I/O4
OE
1
A11
2
A9
3
A8
4
A13
5
WE
6
VDD
7
A14
8
A12
9
A7
10
A6
11
A5
12
A4
13
A3
14
28-pin
TSOP
28
A10
27
CS
26
I/O8
25
I/O7
24
I/O6
23
I/O5
22
I/O4
21
VSS
20
I/O3
19
I/O2
18
I/O1
17
A0
16 A1
15 A2
CLK GEN.
PRECHARGE CKT.
A12
A14
A2
A3
A4
A5
A6
A7
A13
I/O1
:
I/O8
WE
CS
OE
R
O
W
CORE CELL ARRAY
D
512 ROWS
E
C
32 X 8 COLUMNS
O
D
E
R
DATA
CNTRL
.
CLK
GEN.
I/O CKT.
COLUMN DECODER
A11 A10 A1 A0 A8 A9
PIN DESCRIPTION
SYMBOL
A0−A14
I/O1−I/O8
CS
WE
OE
VDD
VSS
NC
DESCRIPTION
Address Inputs
Data Inputs/Outputs
Chip Select Input
Write Enable Input
Output Enable Input
Power Supply
Ground
No Connection
Publication Release Date: December 2000
-1-
Revision A3
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