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

Part NameDM74S473AJ National-Semiconductor
National ->Texas Instruments National-Semiconductor
Description(512 x 8) 4096-Bit TTL PROM
DM74S473AJ Datasheet PDF : 6 Pages
1 2 3 4 5 6
Absolute Maximum Ratings (Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage (Note 2)
b0 5V to a7 0V
Input Voltage (Note 2)
b1 2V to a5 5V
Output Voltage (Note 2)
b0 5V to a5 5V
Storage Temperature
b65 C to a150 C
Lead Temp (Soldering 10 seconds)
300 C
ESD to be determined
Note 1 Absolute maximum ratings are those values beyond which the de-
vice may be permanently damaged They do not mean that the device may
be operated at these values
Note 2 These limits do not apply during programming For the programming
ratings refer to the programming instructions
Operating Conditions
Supply Voltage (VCC)
Commercial
Min
Max
4 75
5 25
Ambient Temperature (TA)
Commercial
0
a70
Logical ‘‘0’’ Input Voltage
Logical ‘‘1’’ Input Voltage
0
08
20
55
DC Electrical Characteristics (Note 1)
Symbol
Parameter
Conditions
DM74S473
Min
Typ
Max
IIL
Input Load Current
VCC e Max VIN e 0 45V
b80
b250
IIH
Input Leakage Current
VCC e Max VIN e 2 7V
25
VCC e Max VIN e 5 5V
10
VOL
Low Level Output Voltage
VCC e Min IOL e 16 mA
0 35
0 45
VIL
Low Level Input Voltage
0 80
VIH
High Level Input Voltage
20
IOZ
Output Leakage Current
VCC e Max VCEX e 2 4V
50
(Open-Collector Only)
VCC e Max VCEX e 5 5V
100
VC
Input Clamp Voltage
VCC e Min IIN e b18 mA
b0 8
b1 2
CI
Input Capacitance
VCC e 5 0V VIN e 2 0V
40
TA e 25 C 1 MHz
CO
Output Capacitance
VCC e 5 0V VO e 2 0V
60
TA e 25 C 1 MHz Outputs Off
ICC
Power Supply Current
VCC e Max Input Grounded
All Outputs Open
110
155
Note 1 These limits apply over the entire operating range unless stated otherwise All typical values are for VCC e 5 0V and TA e 25 C
Units
V
C
V
V
Units
mA
mA
mA
V
V
V
mA
mA
V
pF
pF
mA
3
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General Description
This Schottky memory is organized in the popular 512 words by 8 bits configuration. A memory enable input is provided to control the output states. When the device is enabled, 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 locations. A high may be programmed into any selected location by following the programming instructions.

Features
Advanced titanium-tungsten (Ti-W) fuses
Schottky-clamped for high speed
   Address accessÐ45 ns max
   Enable accessÐ30 ns max
   Enable recoveryÐ30 ns max
PNP inputs for reduced input loading
All DC and AC parameters guaranteed over temperature
Low voltage TRI-SAFE™ programming
Open-collector outputs

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