National Semiconductor DM5445, DM7445 Technical data

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DM5445/DM7445 BCD to Decimal Decoders/Drivers

DM5445/DM7445 BCD to Decimal Decoders/Drivers

June 1989

General Description

These BCD-to-decimal decoders/drivers 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 BCD input
logic ensures that all outputs remain off for all invalid
(10–15) binary input conditions. These decoders feature
high-performance, NPN output transistors designed for use
as indicator/relay drivers, or as open-collector logic-circuit
drivers. The high-breakdown output transistors are compati­ble for interfacing with most MOS integrated circuits.

Connection Diagram

Dual-In-Line Package

TL/F/6517– 1

Order Number DM5445J, DM5445W or DM7445N

See NS Package Number J16A, N16E or W16A

Features

Y

Full decoding of input logic

Y

80 mA sink-current capability

Y

All outputs are off for invalid BCD input conditions

Function Table

Inputs Outputs

No.

DCBA0123456789

0 L L L L LHHHHHHHHH
1 L L LHH L HHHHHHHH
2 L L H L HHLHHHHHHH
3 L L HHHHH L HHHHHH
4 LHL LHHHH L HHHHH

5 LHL HHHHHH L HHHH
6 LHHLHHHHHHLHHH
7 LHHHHHHHHHHL HH
8 H L LLHHHHHHHH L H
9 H L LHHHHHHHHHHL

I H L H LHHHHHHHHHH
N H L HHHHHHHHHHHH
V HHL L HHHHHHHHHH
A HHL HHHHHHHHHHH
L HHH L HHHHHHHHHH

I HHHHHHHHHHHHHH
D

HeHigh Level (Off), LeLow Level (On)

C

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

TL/F/6517

Absolute Maximum Ratings (Note)

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

Output Voltage 30V

Operating Free Air Temperature Range

DM54
DM74 0

Storage Temperature Range

b

55§Ctoa125§C

Ctoa70§C

§

b

65§Ctoa150§C

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 Parameter

V

CC

V

IH

V

IL

V

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 Voltage 30 30 V

Low Level Output Current 20 20 mA

Free Air Operating Temperature

DM5445 DM7445

Min Nom Max Min Nom Max

b

55 125 0 70

Units

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

Symbol Parameter Conditions Min

e

V

I

CEX

V

I

I

I

IH

I

IL

I

CC

I

OL

Input Clamp Voltage V

High Level Output V
Current V

Low Level Output V
Voltage V

Input Current@Max V
Input Voltage

High Level Input Current V

Low Level Input Current V

Supply Current V

CC

CC

e

IL

CC

e

IH

e

I

OL

V

CC

CC

CC

CC

CC

(Note 2)

eb

e

Max, V

e

Min, V

Min, I

Min, V

Min, I

12 mA

I

e

30V

O

e

Min

IH

e

Max

OL

e

Max

IL

80 mA

e

Min

e

e

e

e

e

Max, V

Max, V

Max, V

5.5V

I

e

2.4V 40 mA

I

e

0.4V

I

Max DM54 43 62

DM74 43 70

Typ

(Note 1)

0.2 0.4

0.5 0.9

Max Units

b

1.5 V

250 mA

1mA

b

1.6 mA

mA

C

§

V

Switching Characteristics at V

CC

e

5V and T

e

25§C (See Section 1 for Test Waveforms and Output Load)

A

Symbol Parameter Conditions Min Max Units

t

PLH

t

PHL

Note 1: All typicals are at V

Note 2: I

is measured with all inputs grounded and all outputs open.

CC

Propagation Delay Time C
Low to High Level Output R

Propagation Delay Time
High to Low Level Output

e

e

5V, T

CC

25§C.

A

e

15 pF

L

e

100X

L

49.5 ns

49.5 ns

2

Logic Diagram

Physical Dimensions inches (millimeters)

TL/F/6517– 2

16-Lead Ceramic Dual-In-Line Package (J)

Order Number DM5445J

NS Package Number J16A

3

Physical Dimensions inches (millimeters) (Continued)

16-Lead Molded Dual-In-Line Package (N)

Order Number DM7445N

NS Package Number N16E

DM5445/DM7445 BCD to Decimal Decoders/Drivers

16-Lead Ceramic Flat Package (W)

Order Number DM5445W

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or 2. A critical component is any component of a life
systems which, (a) are intended for surgical implant support device or system whose failure to perform can
into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life
failure to perform, when properly used in accordance support device or system, or to affect its safety or
with instructions for use provided in the labeling, can effectiveness.
be reasonably expected to result in a significant injury
to the user.

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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

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NS Package Number W16A

a

49) 0-180-530 85 86 13th Floor, Straight Block, Tel: [phone]

a

49) 0-180-530 85 85 Tsimshatsui, Kowloon

a

49) 0-180-532 78 32 Hong Kong

a

49) 0-180-532 93 58 Tel: [phone]

a

49) 0-180-534 16 80 Fax: [phone]