HD74HC42 Datasheet, PDF (1/7 Pages) Hitachi Semiconductor – BCD-to-Decimal Decoder

HD74HC42
BCD-to-Decimal Decoder
REJ03D0546-0200
(Previous ADE-205-418)
Rev.2.00
Oct 06, 2005
Description
Data on the four input pins select one of the 10 outputs corresponding to the value of the BCD number on the inputs.
An output will go low when selected, otherwise it remains high. If the input data is not a valid BCD number all outputs
will remain high.
Features
• High Speed Operation: t_pd = 13 ns typ (C_L = 50 pF)
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: V_CC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: I_CC (static) = 4 µA max (Ta = 25°C)
• Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74HC42P
DILP-16 pin
PRDP0016AE-B
(DP-16FV)
P
HD74HC42FPEL SOP-16 pin (JEITA)
PRSP0016DH-B
(FP-16DAV)
FP
HD74HC42RPEL
SOP-16 pin (JEDEC)
PRSP0016DG-A
(FP-16DNV)
RP
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
—
EL (2,000 pcs/reel)
EL (2,500 pcs/reel)
Function Table
BCD Inputs
Decimal Outputs
No.
D
C
B
A
0
1
2
3
4
5
6
7
8
9
0
L
L
L
L
L
H
H
H
H
H
H
H
H
H
1
L
L
L
H
H
L
H
H
H
H
H
H
H
H
2
L
L
H
L
H
H
L
H
H
H
H
H
H
H
3
L
L
H
H
H
H
H
L
H
H
H
H
H
H
4
L
H
L
L
H
H
H
H
L
H
H
H
H
H
5
L
H
L
H
H
H
H
H
H
L
H
H
H
H
6
L
H
H
L
H
H
H
H
H
H
L
H
H
H
7
L
H
H
H
H
H
H
H
H
H
H
L
H
H
8
H
L
L
L
H
H
H
H
H
H
H
H
L
H
9
H
L
L
H
H
H
H
H
H
H
H
H
H
L
INVALID H
L
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H : High level
L : Low level
Rev.2.00, Oct 06, 2005 page 1 of 7