1/9

July 2001

s

HIGH SPEED :

s

LOW POWER DISSIPATION:

s

HIGH NOISE IMMUNITY:

s

SYMMETRICAL OUTPUT IMPEDANCE:

s

BALANCED PROPAGATION DELAYS:

s

WIDE OPERATING VOLTAGE RANGE:

s

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 42

DESCRIPTION

The M74HC42 is an high speed CMOS BCD TO

DECIMAL DECODER fabricated with silicon gate

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

one of ten decimal 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

DECODER, when the D input is assigned as a

disable 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.

M74HC42

BCD TO DECIMAL DECODER

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE

TUBE

T & R

DIP

M74HC42B1R

SOP

M74HC42M1R

M74HC42RM13TR

TSSOP

M74HC42TTR

TSSOP

DIP

SOP