This is information on a product in full production.

May 2013

DocID1973 Rev 2

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12

M74HC42

BCD to decimal decoder

Datasheet

- production data

Features

 High speed: tpd = 14 ns (typ.) at VCC = 6 V

 Low power dissipation:

ICC = 4 A (max.) at TA = 25 °C

 High noise immunity:

VNIH = VNIL = 28% VCC (min.)

 Symmetrical output impedance:

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

 Balanced propagation delays: tPLH  tPHL

 Wide operating voltage range:

VCC (OPR) = 2 to 6 V

 Pin and function compatible with 74 series 42

Description

The M74HC42 is a high-speed CMOS BCD to

decimal decoder manufactured with silicon gate

C2MOS technology.

A BCD code applied to the four inputs A-D selects

one of ten decimal outputs Y0 to Y9. All outputs

are HIGH when binary codes greater than nine

are applied to the inputs.This device can also be

used as a 1 of 8 decoder when the D input is

assigned as an inhibit input. This device is useful

for code conversion, address decoding, memory

selection, demultiplexing or readout decoding.

All inputs are equipped with protection circuits

against static discharge and transient excess

voltage.

SO-16

Table 1. Order code

Order code

Package

M74HC42RM13TR

SOP

www.st.com

Obsolete

Product(s)

- Obsolete

Product(s)