Datasheet M74HC42 Datasheet (SGS Thomson Microelectronics)

.HIGH SPEED

tPD= 13 ns (TYP.) AT VCC=5V

.LOWPOWER DISSIPATION

ICC=4µA(MAX.) AT TA=25°C

.HIGH NOISEIMMUNITY

V

NIH=VNIL

=28%VCC(MIN.)

.OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.SYMMETRICAL OUTPUT IMPEDANCE

|IOH|=IOL=4 mA (MIN.)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.WIDE OPERATINGVOLTAGERANGE

VCC(OPR)= 2 V TO 6 V

.PIN AND FUNCTION COMPATIBLE

WITH 54/74LS42

DESCRIPTION

The M54/74HC42 is a high speedCMOS BCD-TO­DECIMAL DECODER fabricated in silicon gate
C2MOS technology.
It has the same high speed performance of LSTTL
combined with true CMOSlowpower consumption.
A BCD code applied to the four inputs A-D selects
one of ten decimal outputs Y0-Y9, which goes low
tofifteengives ahigh levelatalloutputs.This device
alsocanbeusedas a3-to-8LINEDECODER,when
the D inputis assignedas a disable input. Thisde­vice is useful for code conversion, address decod­ing, memory selection, demultiplexing, or readout
decoding.
Allinputs areequipped withprotection circuitsagainst
staticdischarge and transientexcess voltage.

M54HC42
M74HC42

BCD TO DECIMAL DECODER

B1R

(PlasticPackage)

M1R

(MicroPackage)

ORDER CODES :

M54HC 42F1R M74H C42M1R
M74HC 42B1R M 74HC42C1R

PIN CONNECTIONS(top view)

F1R

(CeramicPackage)

C1R

(Chip Carrier)

INPUT AND OUTPUT EQUIVALENT CIRCUIT

December1992

NC =
No Internal
Connection

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M54/M74HC42

PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

15, 14, 13,12A, B, C, D Data Inputs

1, 2, 3, 4,

to Y

Y

0

Multiplexer Outputs

9

5, 6, 7, 9,

10, 11

8 GND Ground (0V)

16 V

CC

Positive Supply Voltage

LOGI C DIAG RAM

IEC LOGIC SYMBOL

2/10

FUN CTIO N AL TABLE

M54/M74HC42

CODE No.

BCD INPUTS DECIMAL OUTPUTS

DCBAY

Y1Y2Y3Y4Y5Y6Y7Y8Y

0

9

0 LLLLLHHHHHHHHH
1 LLLHHLHHHHHHHH
2 LLHLHHLHHHHHHH
3 LLHHHHHLHHHHHH
4 LHLLHHHHLHHHHH
5 LHLHHHHHHLHHHH
6 LHHLHHHHHHLHHH
7 LHHHHHHHHHHLHH
8 HLLLHHHHHHHHLH

9 HLLHHHHHHHHHHL
10 HLHLHHHHHHHHHH
11 HLHHHHHHHHHHHH
12 HHLLHHHHHHHHHH
13 HHLHHHHHHHHHHH
14 HHHLHHHHHHHHHH
15 HHHHHHHHHHHHHH

ABSOLU TE MAXIMU M RAT INGS

Symbol Parameter Value Unit

V

CC

V

V

O

I

IK

I

OK

I

O

I

or I

CC

P

D

T

stg

T

L

AbsoluteMaximumRatingsarethosevalues beyondwhichdamage tothedevicemayoccur. Functional operationunder theseconditionisnotimplied.
(*)500 mW: ≅ 65oC derate to300 mW by 10mW/oC: 65oCto85oC

Supply Voltage -0.5 to +7 V
DC Input Voltage -0.5 to VCC+ 0.5 V

I

DC Output Voltage -0.5 to VCC+ 0.5 V
DC Input Diode Current ± 20 mA
DC Output Diode Current ± 20 mA
DC Output Source Sink Current Per Output Pin ± 25 mA
DC VCCor Ground Current ± 50 mA

GND

Power Dissipation 500 (*) mW
Storage Temperature -65 to +150
Lead Temperature (10 sec) 300

o

C

o

C

RECO MM ENDED OPERATI N G CONDI TI O NS

Symbol Parameter Value Unit

V

T

t

V

V

r,tf

Supply Voltage 2 to 6 V

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature: M54HC Series

op

M74HC Series

CC
CC

-55 to +125

-40 to +85

Input Rise and Fall Time VCC= 2 V 0 to 1000 ns

= 4.5 V 0 to 500

V

CC

V

= 6 V 0 to 400

CC

V
V

o

C

o

C

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M54/M74HC42

DC SPECIFICA TIONS

Symbol Parameter

V

V

V

V

I

High Level Input

IH

Voltage

Low Level Input

IL

Voltage

High Level

OH

Output Voltage

Low Level Output

OL

Voltage

I

Input Leakage

I

Current
Quiescent Supply

CC

Current

Test Conditions Value

V

(V)

CC

=25oC

A

54HC and 74HC

Min. Typ. Max. Min. Max. Min. Max.

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

T

2.0 1.5 1.5 1.5

4.5 3.15 3.15 3.15

6.0 4.2 4.2 4.2

2.0 0.5 0.5 0.5

4.5 1.35 1.35 1.35

6.0 1.8 1.8 1.8

2.0

4.5 4.4 4.5 4.4 4.4

6.0 5.9 6.0 5.9 5.9

4.5 I

6.0 I

2.0

4.5 0.0 0.1 0.1 0.1

6.0 0.0 0.1 0.1 0.1

4.5 I

6.0 I

6.0

=

V

I

IO=-20 µA

V

IH

or

V

IL

=-4.0 mA 4.18 4.31 4.13 4.10

O

=-5.2 mA 5.68 5.8 5.63 5.60

O

V

=

I

IO=20µA

V

IH

or

V

IL

= 4.0 mA 0.17 0.26 0.33 0.40

O

= 5.2 mA 0.18 0.26 0.33 0.40

O

VI=VCCor GND ±0.1 ±1 ±1 µA

1.9 2.0 1.9 1.9

0.0 0.1 0.1 0.1

6.0 VI=VCCor GND 4 40 80 µA

V

V

V

V

AC ELECTRICAL CHARACTERISTICS (CL=50pF,Inputtr=tf=6ns)

Test Conditions Value

=25oC

T

Symbol Parameter

t
t

TLH
THL

Output Transition
Time

V

CC

(V)

2.0 30 75 95 110

4.5 8151922

A

54HC and 74HC

Min. Typ. Max. Min. Max. Min. Max.

6.0 7131619

t

PLH

t

PHL

Propagation
Delay Time

2.0 64 130 165 195

4.5 16 26 33 39

6.0 14 22 28 33

C

C

PD

Input Capacitance 5 10 10 10 pF

IN

(*) Power Dissipation

60

Capacitance

(*) CPDisdefinedas the value ofthe IC’sinternal equivalent capacitance which is calculated fromthe operatingcurrent consumption without load.
(RefertoTestCircuit).Average operting current can be obtained bythe followingequation. ICC(opr) = CPD•VCC•fIN+I

-40 to 85oC
74HC

-55 to 125oC
54HC

CC

Unit

ns

ns

pF

4/10

SWITCHING CHARACTERISTICS TEST WAVEFORM

TEST CIRCUIT ICC(Opr.)

M54/M74HC42

INPUT WAVEFORMIS THE SAME AS THAT IN CASE OF SWITCHINGCHARACTERISTICTEST

5/10

M54/M74HC42

Plastic DIP16 (0.25) MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

a1 0.51 0.020

B 0.77 1.65 0.030 0.065

b 0.5 0.020

b1 0.25 0.010

D 20 0.787
E 8.5 0.335

e 2.54 0.100

e3 17.78 0.700

F 7.1 0.280

I 5.1 0.201

L 3.3 0.130

Z 1.27 0.050

mm inch

6/10

P001C

Ceramic DIP16/1 MECHANICAL DATA

M54/M74HC42

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 20 0.787
B 7 0.276
D 3.3 0.130
E 0.38 0.015

e3 17.78 0.700

F 2.29 2.79 0.090 0.110
G 0.4 0.55 0.016 0.022
H 1.17 1.52 0.046 0.060

L 0.22 0.31 0.009 0.012
M 0.51 1.27 0.020 0.050
N 10.3 0.406

P 7.8 8.05 0.307 0.317

Q 5.08 0.200

mm inch

P053D

7/10

M54/M74HC42

SO16 (Narrow) MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.75 0.068
a1 0.1 0.2 0.004 0.007
a2 1.65 0.064

b 0.35 0.46 0.013 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.019

c1 45° (typ.)

D 9.8 10 0.385 0.393

E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 8.89 0.350

F 3.8 4.0 0.149 0.157

G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.019 0.050

M 0.62 0.024

S8°(max.)

mm inch

8/10

P013H

PLCC20 MECHANICAL DATA

M54/M74HC42

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 9.78 10.03 0.385 0.395

B 8.89 9.04 0.350 0.356

D 4.2 4.57 0.165 0.180
d1 2.54 0.100
d2 0.56 0.022

E 7.37 8.38 0.290 0.330

e 1.27 0.050

e3 5.08 0.200

F 0.38 0.015
G 0.101 0.004
M 1.27 0.050

M1 1.14 0.045

mm inch

P027A

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M54/M74HC42

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is grantedbyimplication or otherwise under any patent or patentrights ofSGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproductsare notauthorized foruse ascritical componentsinlife support devices orsystems withoutexpress
written approval of SGS-THOMSON Microelectonics.

 1994 SGS-THOMSON Microelectronics - All Rights Reserved

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