W24258 Datasheet, PDF (1/11 Pages) Winbond – 32K X 8 CMOS STATIC RAM

W24258
32K × 8 CMOS STATIC RAM
GENERAL DESCRIPTION
The W24258 is a normal speed, very low power CMOS static RAM organized as 32768 × 8 bits that
operates on a wide voltage range from 2.7V to 5.5V power supply. The W24258 family, W24258-
70LE and W24258-70LI, can meet requirement of various operating temperature. This device is
manufactured using Winbond's high performance CMOS technology.
FEATURES
• Low power consumption:
− Active: 350 mW (max.)
− Standby: 6 µW (max.)/3V
25 µW (max.)/5V
• Access time: 70 nS (max.)/5V
100 nS (max.)/3V
• Single 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 28-pin 600 mil DIP, 330 mil SOP
and standard type one TSOP (8 mm × 13.4
mm)
PIN CONFIGURATIONS
BLOCK DIAGRAM
A14 1
A12 2
28
VDD
27
WE
A7 3
26
A13
A6 4
25
A8
A5 5
24
A9
A4 6
23
A11
28-pin
A3 7
DIP 22
OE
A2 8
21
A10
A1 9
20
CS
A0 10
19
I/O8
I/O1 11
18
I/O7
I/O2 12
17
I/O6
I/O3 13
VSS ₁₄
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 1
A6 0
A5 1
A4 1
A3 1
2
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
R
A2
O
W
CORE CELL ARRAY
A3
A4
D
E
512 ROWS
A5
C
O
64 X 8 COLUMNS
D
A6
E
R
A7
A13
I/O1
DATA
I/O CKT.
I/O8
CNTRL. COLUMN DECODER
CLK
GEN.
A11 A10 A1 A0 A8 A9
WE
CS
OE
PIN DESCRIPTION
SYMBOL
A0−A14
I/O1−I/O8
CS
WE
OE
VDD
VSS
DESCRIPTION
Address Inputs
Data Inputs/Outputs
Chip Select Input
Write Enable Input
Output Enable Input
Power Supply
Ground
Publication Release Date: November 1998
-1-
Revision A8