W24258-LL Datasheet, PDF (1/10 Pages) Winbond – 32K X 8 CMOS STATIC RAM

W24258/LL
GENERAL DESCRIPTION
32K × 8 CMOS STATIC RAM
The W24258/LL is a normal speed, very low power CMOS static RAM organized as 32768 × 8 bits
that operates on a single 5-volt power supply. This device is manufactured using Winbond's high
performance CMOS technology.
FEATURES
• Low power consumption:
− Active: 350 mW (max.)
− Standby: 25 µW (max.)
• Access time: 55/70 nS (max.)
• Single 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
V_SS
14
16
I/O5
15
I/O4
CLK GEN.
PRECHARGE CKT.
A12
A14
R
A2
O
W
A3
CORE CELL ARRAY
D
A4
E
512 ROWS
C
A5
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
OE
1
A11
2
A9
3
A8
4
A13
5
WE
6
V DD
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
V SS
20
I/O3
19
I/O2
18
I/O1
17
A0
16
A1
15
A2
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 A5