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CD74HC42 Datasheet Preview

CD74HC42 Datasheet

BCD-to-Decimal Decoders

No Preview Available !

Data sheet acquired from Harris Semiconductor
SCHS133C
August 1997 - Revised May 2003
CD54HC42, CD74HC42,
CD74HCT42
High-Speed CMOS Logic
BCD-to-Decimal Decoders (1 of 10)
[ /Title
(CD74H
C42,
CD74H
CT42)
/Subject
(High
Speed
CMOS
Logic
BCD To
Deci-
Features
Description
• Buffered Inputs and Outputs
Typical Propagation Delay:
CL = 15pF, TA = 25oC
12ns
at
VCC
=
5V,
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
The ’HC42 and CD74HCT42 BCD-to-Decimal Decoders
utilize silicon-gate CMOS technology to achieve operating
speeds similar to LSTTL decoders with the low power
consumption of standard CMOS integrated circuits. These
devices have the capability of driving 10 LSTLL loads and
are compatible with the standard LS logic family. One of ten
outputs (low on select) is selected in accordance with the
BCD input. Non-valid BCD inputs result in none of the
outputs being selected (all outputs are high).
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
Ordering Information
PART NUMBER TEMP. RANGE (oC)
PACKAGE
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il 1µA at VOL, VOH
CD54HC42F3A
CD74HC42E
CD74HC42M
CD74HCT42E
-55 to 125
-55 to 125
-55 to 125
-55 to 125
16 Ld CERDIP
16 Ld PDIP
16 Ld SOIC
16 Ld PDIP
Pinout
CD54HC42
(CERDIP)
CD74HC42
(PDIP, SOIC)
CD74HCT42
(PDIP)
TOP VIEW
Y0 1
Y1 2
Y2 3
Y3 4
Y4 5
Y5 6
Y6 7
GND 8
16 VCC
15 A0
14 A1
13 A2
12 A3
11 Y9
10 Y8
9 Y7
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2003 Texas Instruments Incorporated.
1




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CD74HC42 Datasheet Preview

CD74HC42 Datasheet

BCD-to-Decimal Decoders

No Preview Available !

Functional Diagram
CD54HC42, CD74HC42, CD74HCT42
15
A0
14
A1
13
A2
12
A3
1
Y0
2
Y1
3
Y2
4
Y3
5
Y4
6
Y5
7
Y6
9
Y7
10
Y8
11
Y9
TRUTH TABLE
INPUTS
OUTPUTS
A3
A2
A1
A0
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
Y9
L
L
L
L
L
H
H
H
H
H
H
H
H
H
L
L
L
H
H
L
H
H
H
H
H
H
H
H
L
L
H
L
H
H
L
H
H
H
H
H
H
H
L
L
H
H
H
H
H
L
H
H
H
H
H
H
L
H
L
L
H
H
H
H
L
H
H
H
H
H
L
H
L
H
H
H
H
H
H
L
H
H
H
H
L
H
H
L
H
H
H
H
H
H
L
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
L
L
L
H
H
H
H
H
H
H
H
L
H
H
L
L
H
H
H
H
H
H
H
H
H
H
L
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 Voltage Level, L = Low Voltage Level
2


Part Number CD74HC42
Description BCD-to-Decimal Decoders
Maker etcTI
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CD74HC42 Datasheet PDF






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