Rainbow Electronics W2465 - Manual

W2465
8K
×
8 CMOS STATIC RAM
Publication Release Date: April 1997
- 1 - Revision A8
GENERAL DESCRIPTION
The W2465 is a slow-speed, low-power CMOS static RAM organized as 8192
×
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: 250 mW (max.)
−
Standby: 100
µ
W (max.)(LL-version)
250
µ
W (max.)(L-version)
• Access time: 70/100 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.)
• Available packages: 28-pin 600 mil DIP,
330 mil SOP and 300 mil skinny DIP
PIN CONFIGURATION
A8
A9
1
2
3
4
5
25
26
27
28 NC
A7
A6
A5
A12
A4
A3
A2
A1
6
7
8
9 20
21
22
23 A11
A10
I/O8
I/O7
I/O6
I/O5
10
11
12
13 16
17
18
19 A0
I/O2
I/O3
I/O1
14 15 I/O4
CS
CS
OE
WE
V DD
V SS
24
BLOCK DIAGRAM
A0
.
CS1
A12
WE
I/O1
I/O8
OE
V
V
.
. DATA I/O
ARRAY
DECODER
CORE
CS2
.
CONTROL
DD
SS
PIN DESCRIPTION
SYMBOL DESCRIPTION
A0
−
A12 Address Inputs
I/O1
−
I/O8 Data Inputs/Outputs
CS1, CS2
Chip Select Inputs
WE
Write Enable Input
OE
Output Enable Input
V DD Power Supply
V SS Ground
NC No Connection