Preliminary W24258C
32K ´ 8 CMOS STATIC RAM
GENERAL DESCRIPTION
The W24258C 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. This device is manufactured using
Winbond's high performance CMOS technology.
FEATURES
· Low power consumption:
- Active: 350 mW (max.)
- Standby: 6 mW (max.)/3V
25 mW (max.)/5V
· Access time: 70 nS (max.)/5V
100 nS (max.)/3V
· 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)
· Single 3V/5V power supply
· Fully static operation
PIN CONFIGURATIONS
BLOCK DIAGRAM
CLK GEN.
PRECHARGE CKT.
A12
A14
A2
A14
A12
A7
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
DD
2
WE
A13
A8
R
O
W
3
CORE CELL ARRAY
512 ROWS
A3
D
E
C
O
D
E
R
A6
A5
A4
A3
A2
A1
4
A4
64 X 8 COLUMNS
5
A9
A5
A6
A11
OE
6
28-pin
DIP
A7
7
A13
I/O1
I/O8
8
A10
CS
I/O CKT.
COLUMN DECODER
DATA
CNTRL.
9
A0
I/O1
I/O2
10
11
12
13
14
I/O8
I/O7
I/O6
I/O5
I/O4
CLK
GEN.
A10 A1 A0 A8 A9
A11
WE
CS
OE
I/O3
V
SS
PIN DESCRIPTION
SYMBOL
DESCRIPTION
A10
Address Inputs
1
2
3
4
5
6
7
8
9
1
0
1
1
1
OE
A0- A14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CS
I/O8
I/O7
I/O6
I/O5
A11
A9
Data Inputs/Outputs
Chip Select Input
Write Enable Input
Output Enable Input
Power Supply
I/O1- I/O8
A8
A13
WE
CS
28-pin
TSOP
V
DD
I/O4
V
A14
A12
A7
A6
A5
A4
A3
SS
WE
I/O3
I/O2
I/O1
A0
A1
A2
OE
VDD
VSS
Ground
Publication Release Date: December 1998
Revision A1
- 1 -