W26020A
128K
×
16 HIGH-SPEED CMOS STATIC RAM
GENERAL DESCRIPTION
The W26020A is a high-speed, low-power CMOS static RAM organized as 131,072
×
16 bits that
operates on a single 5-volt power supply. This device is manufactured using Winbond's high
performance CMOS technology.
The W26020A has an active low chip select, separate upper and lower byte selects, and a fast output
enable. No clock or refreshing is required. Separate byte select controls (
LB
and
UB
) allow
individual bytes to be written and read.
LB
controls I/O1-I/O8, the lower byte.
UB
controls I/O9−
I/O16, the upper byte. This device is well suited for use in high-density, high-speed system
applications.
FEATURES
•
High speed access time: 20/25 nS (max.)
•
Low power consumption:
−
Active: 1.5W (max.)
•
Single
+5V
power supply
•
Fully static operation
−
No clock or refreshing
•
All inputs and outputs directly TTL compatible
•
Three-state outputs
•
Data byte control
−
LB
(I/O1−I/O8),
UB
(I/O9−I/O16)
•
Available packages: 44-pin type two TSOP
PIN CONFIGURATION
BLOCK DIAGRAM
V
DD
V
SS
A0
A1
A2
A3
A4
CS
I/O1
I/O2
I/O3
I/O4
V
DD
V
SS
I/O5
I/O6
I/O7
I/O8
WE
A5
A6
A7
A8
A16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
A15
A14
A13
A0
.
.
A16
DECODER
CORE
ARRAY
OE
UB
LB
I/O16
I/O15
I/O14
I/O13
V
SS
V
DD
I/O12
I/O11
I/O10
I/O9
NC
A12
A11
A10
A9
NC
UB
CS
OE
WE
LB
CONTROL
I/O1
.
.
I/O16
DATA I/O
PIN DESCRIPTION
SYMBOL
A0−A16
I/O1−I/O16
CS
WE
OE
LB
UB
V
DD
V
SS
NC
DESCRIPTION
Address Inputs
Data Inputs/Outputs
Chip Select Inputs
Write Enable Input
Output Enable Input
Lower Byte Select I/O1−I/O8
Upper Byte Select I/O9−I/O16
Power Supply
Ground
No Connection
Publication Release Date: July 1998
Revision A3
-1-
WINBOND [ WINBOND ]
