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參數(shù)資料
| 型號(hào)： | 74S473 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | (512 x 8) 4096-Bit TTL PROM |
| 中文描述： | （512 × 8）4096位TTL胎膜早破 |
| 文件頁(yè)數(shù)： | 1/7頁(yè) |
| 文件大小： | 126K |
| 代理商： | 74S473 |
TL/D/9715
D
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 accessD45 ns max
Enable accessD30 ns max
Enable recoveryD30 ns max
Y
PNP inputs for reduced input loading
Y
All DC and AC parameters guaranteed over
temperature
Y
Low voltage TRI-SAFE
TM
programming
Y
Open-collector outputs
Block Diagram
TL/D/9715–1
Pin Names
A0–A8
Addresses
G
Output Enable
GND
Ground
Q0–Q7
Outputs
V
CC
Power Supply
TRI-SAFE
TM
is a trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M105/Printed in U. S. A.
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