National Semiconductor 5442A, DM5442A, DM7442A Technical data

查询5442ADMQB供应商

5442A/DM5442A/DM7442A
BCD to Decimal Decoders

5442A/DM5442A/DM7442A BCD to Decimal Decoders

June 1989

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.

Connection Diagram

Dual-In-Line Package

Order Number 5442ADMQB, 5442AFMQB, DM5442AJ, DM5442AW or DM7442AN

See NS Package Number J16A, N16E or W16A

Function Table

No.

HeHigh Level

e

L

BCD Input Decimal Output

DCBA0123456789

0 L L L L LHHHHHHHHH
1 L L L HHL HHHHHHHH
2 L L HL HHL HHHHHHH
3 L L HHHHHL HHHHHH
4 LHL L HHHHL HHHHH

5 LHL HHHHHHL HHHH
6 LHHLHHHHHHLHHH
7 LHHHHHHHHHHL HH
8 H L L LHHHHHHHHL H
9 H L LHHHHHHHHHHL

I H LHL HHHHHHHHHH
N H LHHHHHHHHHHHH
V HHLLHHHHHHHHHH
A HHL HHHHHHHHHHH
L HHH LHHHHHHHHHH

I HHHHHHHHHHHHHH
D

Low Level

Features

Y

Diode clamped inputs

Y

Also for application as 4-line-to-16-line decoders; 3-line­to-8-line decoders

Y

All outputs are high for invalid input conditions

Y

Typical power dissipation 140 mW

Y

Typical propagation delay 17 ns

Y

Alternate Military/Aerospace device (5442A) is avail­able. Contact a National Semiconductor Sales Office/
Distributor for specifications.

TL/F/6516– 1

C

1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.

TL/F/6516

Absolute Maximum Ratings (Note)

The ‘‘Absolute Maximum Ratings’’ are those values

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

DM54 and 54
DM74 0

Storage Temperature Range

b

55§Ctoa125§C

Ctoa70§C

§

b

65§Ctoa150§C

Note:

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 Parameter

V

CC

V

IH

V

IL

I

OH

I

OL

T

A

Supply Voltage 4.5 5 5.5 4.75 5 5.25 V

High Level Input Voltage 2 2 V

Low Level Input Voltage 0.8 0.8 V

High Level Output Current

Low Level Output Current 16 16 mA

Free Air Operating Temperature

DM5442A DM7442A

Min Nom Max Min Nom Max

b

0.8

b

55 125 0 70

b

Units

0.8 mA

Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)

Symbol Parameter Conditions Min

e

V

I

V

OH

V

OL

I

I

I

IH

I

IL

I

OS

I

CC

Note 1: All typicals are at V

Note 2: Not more than one output should be shorted at a time.

Note 3: I

Input Clamp Voltage V

High Level Output V
Voltage V

Low Level Output V
Voltage V

Input Current@Max V
Input Voltage

High Level Input Current V

Low Level Input Current V

Short Circuit V
Output Current (Note 2)

Supply Current V

e

e

5V, T

CC

is measured with all outputs open and all inputs grounded.

CC

25§C.

A

CC

CC

IL

CC

IH

CC

CC

CC

CC

CC

(Note 3)

e

e

eb

Min, I

e

Min, I

Max, V

e

Min, I

Min, V

e

Max, V

e

Max, V

e

Max, V

e

Max DM54

e

Max DM54 28 41

12 mA

I

e

Max

OH

e

Min

IH

e

Max

OL

e

Max

IL

e

5.5V

I

e

2.4V 40 mA

I

e

0.4V

I

DM74

2.4 3.4 V

b

b

DM74 28 56

20

18

Typ

(Note 1)

Max Units

b

1.5 V

0.2 0.4 V

1mA

b

1.6 mA

b

55

b

55

§

mA

mA

C

2