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DM74S473AJ View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
DM74S473AJ (512 x 8) 4096-Bit TTL PROM National-Semiconductor
National ->Texas Instruments National-Semiconductor
DM74S473AJ Datasheet PDF : 6 Pages
1 2 3 4 5 6
November 1990
DM74S473
(512 x 8) 4096-Bit TTL PROM
General Description
This Schottky memory is organized in the popular 512
words by 8 bits configuration A memory enable input is pro-
vided to control the output states When the device is en-
abled the outputs represent the contents of the selected
word When disabled the 8 outputs go to the ‘‘OFF’’ or high
impedance state
PROMs are shipped from the factory with lows in all loca-
tions A high may be programmed into any selected location
by following the programming instructions
Features
Y Advanced titanium-tungsten (Ti-W) fuses
Y Schottky-clamped for high speed
Address access 45 ns max
Enable access 30 ns max
Enable recovery 30 ns max
Y PNP inputs for reduced input loading
Y All DC and AC parameters guaranteed over
temperature
Y Low voltage TRI-SAFETM programming
Y Open-collector outputs
Block Diagram
Pin Names
A0 – A8
Addresses
G
Output Enable
GND
Ground
Q0 – Q7
Outputs
VCC
Power Supply
TL D 9715 – 1
TRI-SAFETM is a trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL D 9715
RRD-B30M105 Printed in U S A
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