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ESD Protection Exceeds 2000V
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.
MODE SELECTION
PINS
MODE
CS1/V
PP
CS2
CS3
V
CC
OUTPUTS
PIN CONFIGURATION
TOP VIEW
CERDIP
Read
Output
Disable
Output
Disable
Program
Program
Verify
Output
Disable
V
IL
V
IH
X
V
PP
V
IL
X
V
IH
X
V
IL
X
V
IH
X
V
IH
X
X
X
V
IH
V
IL
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
D
OUT
High Z
High Z
D
IN
D
OUT
High Z
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
V
CC
A
8
A
9
A10
CS1/V
PP
CS2
CS3
O
7
O
6
O
5
O
4
O
3
PRODUCT SELECTION GUIDE
PARAMETER
Address Access Time (Max)
CS to Output Valid Time (Max)
WS57C191C/291C-35
35 ns
20 ns
WS57C191C/291C-45
45 ns
20 ns
WS57C191C/291C-55
55 ns
20 ns
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STMicroelectronics
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