5442A DM5442A DM7442A BCD to Decimal Decoders
June 1989
5442A DM5442A DM7442A BCD to Decimal Decoders
General Description
These BCD-to-decimal decoders consist of eight inverters and ten four-input NAND gates The inverters are connected in pairs to make BCD input data available for decoding by the NAND gates Full decoding of input logic ensures that all outputs remain off for all invalid (10–15) input conditions
Features
Y Y
Y Y Y Y
Diode clamped inputs Also for application as 4-line-to-16-line decoders 3-lineto-8-line decoders All outputs are high for invalid input conditions Typical power dissipation 140 mW Typical propagation delay 17 ns Alternate Military Aerospace device (5442A) is available Contact a National Semiconductor Sales Office Distributor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6516 – 1
Order Number 5442ADMQB 5442AFMQB DM5442AJ DM5442AW or DM7442AN See NS Package Number J16A N16E or W16A
Function Table
No D 0 1 2 3 4 5 6 7 8 9 I N V A L I D L L L L L L L L H H H H H H H H BCD Input C L L L L H H H H L L L L H H H H B L L H H L L H H L L H H L L H H A L H L H L H L H L H L H L H L H 0 L H H H H H H H H H H H H H H H 1 H L H H H H H H H H H H H H H H 2 H H L H H H H H H H H H H H H H Decimal Output 3 H H H L H H H H H H H H H H H H 4 H H H H L H H H H H H H H H H H 5 H H H H H L H H H H H H H H H H 6 H H H H H H L H H H H H H H H H 7 H H H H H H H L H H H H H H H H 8 H H H H H H H H L H H H H H H H 9 H H H H H H H H H L H H H H H H
H e High Level L e Low Level
C1995 National Semiconductor Corporation
TL F 6516
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 7V Input Voltage 5 5V Operating Free Air Temperature Range b 55 C to a 125 C DM54 and 54 DM74 0 C to a 70 C Storage Temperature Range
b 65 C to a 150 C
Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed The device should not be operated at these limits The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation
Recommended Operating Conditions
Symbol VCC VIH VIL IOH IOL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Free Air Operating Temperature
b 55
DM5442A Nom 5 Max 55 08
b0 8
DM7442A Min 4 75 2 08
b0 8
Units Max 5 25 V V V mA mA C
Nom 5
45 2
16 125 0
16 70
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol VI VOH VOL II IIH IIL IOS ICC Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Input Current Input Voltage Max Conditions VCC e Min II e b12 mA VCC e Min IOH e Max VIL e Max VIH e Min VCC e Min IOL e Max VIH e Min VIL e Max VCC e Max VI e 5 5V VCC e Max VI e 2 4V VCC e Max VI e 0 4V VCC e Max (Note 2) VCC e Max (Note 3) DM54 DM74 DM54 DM74
b 20 b 18
Min
Typ (Note 1)
Max
b1 5
Units V V
24
34 02 04 1 40
b1 6 b 55 b 55
V mA mA mA mA mA
High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current
28 28
41 56
Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time Note 3 ICC is measured with all outputs open and all inputs grounded
2
Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
Symbol tPHL Parameter Propagation Delay Time High to Low Level Output from A B C or D through 2 Levels of Logic Propagation Delay Time High to Low Level Output from A B C or D through 3 Levels of Logic Propagation Delay Time Low to High Level Output from A B C or D through 2 Levels of Logic Propagation Delay Time Low to High Level Output from A B C or D through 3 Levels of Logic Conditions CL e 15 pF RL e 400X Min Max Units
25
ns
tPHL
30
ns
tPLH
25
ns
tPLH
30
ns
Logic Diagram
Tl F 6516 – 2
3
4
Physical Dimensions inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J) Order Number 5442ADMQB or DM5442AJ NS Package Number J16A
16-Lead Molded Dual-In-Line Package (N) Order Number DM7442AN NS Package Number N16E
5
5442A DM5442A DM7442A BCD to Decimal Decoders
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flat Package (W) Order Number 5442AFMQB or DM5442AW NS Package Number W16A
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