PRODUCT SELECTION GUIDE
PARAMETER
WS57C191C/291C-35
WS57C191C/291C-45
WS57C191C/291C-55
Address Access Time (Max)
35 ns
45 ns
55 ns
CS to Output Valid Time (Max)
20 ns
20 ns
20 ns
MILITARY HIGH SPEED 2K x 8 CMOS PROM/RPROM
KEY FEATURES
Ultra-Fast Access Time
Pin Compatible with Am27S191/291
-- t
ACC
= 35 ns
and N82S191 Bipolar PROMs
-- t
CS
= 20 ns
Immune to Latch-UP
Low Power Consumption
-- Up to 200 mA
Fast Programming
ESD Protection Exceeds 2000V
Available in 300 and 600 Mil DIP
GENERAL DESCRIPTION
The WS57C191C/291C is an extremely High Performance 16K UV Erasable Electrically Re-Programmable Read
Only Memory (RPROM). It is manufactured in an advanced CMOS technology which enables it to operate at Bipolar
PROM speeds while consuming only 25% of the power required by its Bipolar counterparts. The WS57C191C/291C
is also configured in the standard Bipolar PROM pinout which provides an easy upgrade path for systems which are
currently using Bipolar PROMs.
The WS57C191C is packaged in a conventional 600 mil DIP package. The WS57C291C is packaged in a space
saving 300 mil DIP package configuration.
WS57C191C/291C
PINS
CS1/V
PP
CS2
CS3
V
CC
OUTPUTS
MODE
Read
V
IL
V
IH
V
IH
V
CC
D
OUT
Output
Disable
V
IH
X
X
V
CC
High Z
Output
X
V
IL
X
V
CC
High Z
Disable
Program
V
PP
X
X
V
CC
D
IN
Program
Verify
V
IL
V
IH
V
IH
V
CC
D
OUT
Output
Disable
X
X
V
IL
V
CC
High Z
V
CC
A
8
A
9
A10
CS1/V
PP
CS2
CS3
O
7
O
6
O
5
O
4
O
3
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
O
0
O
1
O
2
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
TOP VIEW
CERDIP
MODE SELECTION
PIN CONFIGURATION
4-3
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ORDERING INFORMATION
SPEED
PACKAGE
PACKAGE
OPERATING WSI
PART NUMBER
(ns)
TYPE
DRAWING
TEMPERATURE MANUFACTURING
RANGE
PROCEDURE
WS57C191C
WS57C191C-35DMB
35
24 Pin CERDIP, 0.6"
D1
Military
MIL-STD-883C
WS57C191C-45DMB
45
24 Pin CERDIP, 0.6"
D1
Military
MIL-STD-883C
WS57C191C-55DMB
55
24 Pin CERDIP, 0.6"
D1
Military
MIL-STD-883C
WS57C291C
WS57C291C-35TMB
35
24 Pin CERDIP, 0.3"
T1
Military
MIL-STD-883C
WS57C291C-45TMB
45
24 Pin CERDIP, 0.3"
T1
Military
MIL-STD-883C
WS57C291C-55TMB
55
24 Pin CERDIP, 0.3"
T1
Military
MIL-STD-883C
WS57C191C/291C
4-4
PROGRAMMING/ALGORITHMS/ERASURE/PROGRAMMERS
REFER TO
PAGE 5-1
NOTE: 9. The actual part marking will not include the initials "WS."
The WS57C191C and WS57C291C are programmed using Algorithm D shown on page 5-9.
For complete data sheet and electrical specifications see page 2-7.
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