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
— tACC = 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/VPP CS2 CS3 VCC OUTPUTS
MODE
Read VIL VIH VIH VCC DOUT
Output
Disable VIH XXV
CC High Z
Output XV
IL XV
CC High Z
Disable
Program VPP XXV
CC DIN
Program
Verify VIL VIH VIH VCC DOUT
Output
Disable XXV
IL VCC High Z
VCC
A8
A9
A10
CS1/VPP
CS2
CS3
O7
O6
O5
O4
O3
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
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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