SGS Thomson Microelectronics M74HC42TTR, M74HC42RM13TR, M74HC42M1R, M74HC42B1R Datasheet

M74HC42

BCD TO DECIMAL DECODER

■ HIGH SPEED :

t

= 14ns (TYP.) at VCC = 6V

PD

■ LOW POWER DISSIPATION:

I

=4µA(MAX.) at TA=25°C

CC

■ HIGH NOISE IMMUNITY:

V

= V

NIH

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

| = IOL = 4mA (MIN)

OH

■ BALANCED PROPAGATION DELAYS:

t

≅ t

PLH

■ WIDE OPERATING VOLTAGE RANGE:

V

(OPR) = 2V to 6V

CC

■ PIN AND FUNCTION COMPATIBLE WITH

= 28 % VCC (MIN.)

NIL

PHL

74 SERIES 42

DESCRIPTION

The M74HC42 is an high speed CMOS BCD TO
DECIMAL DECODER fabricated with silicon gate

2

C

MOS technology.
A BCD code applied to the four inputs A-D selects
one of ten de cimal outputs Y0

- Y9, which goes
low to fifteen gives a high level at all outputs. This
device also can be used as a 3 to LINE

TSSOPDIP SOP

ORDER CODES

PACKAGE TUBE T & R

DIP M74HC42B1R

SOP M74HC42M1R M74HC42RM13TR

TSSOP M74HC42TTR

DECODER, when the D input is assigned as a
disable input. This device is useful for code
conversion, address decoding, me mory selection,
demultiplexing, or readout decoding.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

1/9July 2001

M74HC42

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

15, 14, 13,

12

1, 2, 3, 4, 5,

6, 7, 8, 9, 10,

11

8 GND Ground (0V)

16 Vcc Positive Supply Voltage

FUNCTIONAL TABLE

A, B, C, D Data Inputs

TO Y

Y

0

Multiplexer Outputs

9

CODE No

DCBA

Y

0

Y

1

Y

2

Y

3

Y

4

Y

5

Y

6

Y

7

Y

8

0 LLLLLHHHHHHHHH
1 LL LHHLHHHHHHHH
2 LLHLHHLHHHHHHH
3 LLHHHHHLHHHHHH
4 LHL LHHHHLHHHHH
5 LHLHHHHHHLHHHH
6 LHHLHHHHHHLHHH
7 LHHHHHHHHHHLHH
8 HLL LHHHHHHHHLH

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

BCD INPUTS DECIMAL OUTPUTS

Y

9

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LOGIC DIAGRAM

M74HC42

This log i c diagram has not be used to est i m at e propagation delays

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

V

I

I

OK

I

I

or I

CC

P

T

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65

Supply Voltage

CC

DC Input Voltage -0.5 to VCC + 0.5

I

DC Output Voltage -0.5 to VCC + 0.5

O

DC Input Diode Current

IK

DC Output Diode Current
DC Output Current

O

DC VCC or Ground Current

GND

Power Dissipation

D

Storage Temperature

stg

Lead Temperature (10 sec)

L

°C; derate to 300mW by 10mW/°C from 65°C to 85°C

-0.5 to +7 V
V
V

± 20 mA
± 20 mA
± 25 mA
± 50 mA

500(*) mW

-65 to +150 °C

300 °C

3/9

M74HC42

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Value Unit

V

V

V

T

t

r

DC SPECIFICATIONS

Symbol Parameter

V

IH

V

IL

V

OH

V

OL

I

I

I

CC

Supply Voltage

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature

op

Input Rise and Fall Time VCC = 2.0V

, t

f

V
V

CC
CC

= 4.5V
= 6.0V

Test Condition Value

T

= 25°C

A

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

High Level Input

V

CC

(V)

2.0 1.5 1.5 1.5

Voltage

6.0 4.2 4.2 4.2

Low Level Input

2.0 0.5 0.5 0.5

Voltage

6.0 1.8 1.8 1.8

High Level Output
Voltage

Low Level Output
Voltage

Input Leakage
Current

Quiescent Supply
Current

2.0

4.5

6.0

4.5

6.0

2.0

4.5

6.0

4.5

6.0

6.0

6.0

IO=-20 µA
I

=-20 µA

O

I

=-20 µA

O

I

=-4.0 mA

O

I

=-5.2 mA

O

IO=20 µA
I

=20 µA

O

I

=20 µA

O

I

=4.0 mA

O

I

=5.2 mA

O

= VCC or GND

V

I

= VCC or GND

V

I

1.9 2.0 1.9 1.9

4.4 4.5 4.4 4.4

5.9 6.0 5.9 5.9

4.18 4.31 4.13 4.10

5.68 5.8 5.63 5.60

0.0 0.1 0.1 0.1

0.0 0.1 0.1 0.1

0.0 0.1 0.1 0.1

0.17 0.26 0.33 0.40

0.18 0.26 0.33 0.40
± 0.1 ± 1 ± 1 µA

44080µA

2 to 6 V

CC
CC

-55 to 125 °C

0 to 1000 ns

0 to 500 ns
0 to 400 ns

-40 to 85°C -55 to 125°C

V
V

Unit

V4.5 3.15 3.15 3.15

V4.5 1.35 1.35 1.35

V

V

AC ELECTRICAL CHARACTERISTICS (C

Test Condition Value

Symbol Parameter

t

TLH tTHL

t

PLH tPHL

Output Transition
Time

Propagation Delay
Time

4/9

V

CC

(V)

2.0 30 75 95 110

6.0 7131619

2.0 64 130 165 195

6.0 14 22 28 33

= 50 pF, Input tr = tf = 6ns)

L

T

= 25°C

A

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

-40 to 85°C -55 to 125°C

Unit

ns4.5 8151922

ns4.5 16 26 33 39

M74HC42

CAPACITIVE CHARACTERISTICS

Test Condition Value

T

Symbol Parameter

V

CC

(V)

C

C

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (R ef er to Test Circui t). Averag e operating current can be obtained by the following equation. I

Input Capacitance

IN

Power Dissipation

PD

Capacitance (note 1)5.0 60 pF

5.0 5101010pF

= 25°C

A

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

TEST CIRCUIT

-40 to 85°C -55 to 125°C

= CPD x VCC x fIN + ICC

CC(opr)

Unit

CL = 50pF or equivalent (includes jig and p robe capacit ance)

= Z

R

of pulse generator (typically 50Ω)

T

OUT

WAVEFORM : PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)

5/9

M74HC42

Plastic DIP-16 (0.25) MECHANICAL DATA

mm. inch

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

6/9

P001C

SO-16 MECHANICAL DATA

M74HC42

DIM.

A 1.75 0.068
a1 0.1 0.2 0.003 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.)

MIN. TYP MAX. MIN. TYP. M AX.

mm. inch

PO13H

7/9

M74HC42

TSSOP16 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. M AX.

A 1.2 0.047

A1 0.05 0.15 0.002 0.004 0.006

A2 0.8 1 1.05 0.031 0.039 0.041

b 0.19 0.30 0.007 0.012

c 0.09 0.20 0.004 0.0089

D 4.9 5 5.1 0.193 0.197 0.201

E 6.2 6.4 6.6 0.244 0.252 0.260

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0° 8°0° 8°

L 0.45 0.60 0.75 0.018 0.024 0.030

A2

A

A1

b

e

c

K

L

E

D

E1

PIN 1 IDENTIFICATION

8/9

1

0080338D

M74HC42

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consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No li cense is granted by imp lication or otherwise under a ny patent or patent rig hts of STMicroelectronics. Spec ific at ions
mentioned in this publication ar e subject to change without notice. This publication supersedes and replaces all information
previously supplied. S TMicroelectronics products are not authorized for use as critica l components in life suppo rt devices or
systems without express written approval of STMicroelectronics.

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