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MM74C42
BCD-to-Decimal Decoder
MM74C42 BCD-to-Decimal Decoder
October 1987
Revised January 1999
General Description
The MM74C42 one- of-ten decod er is a mo nolith ic co mplementary MOS (C MOS) integrated circuit constructe d with
N- and P-channel enha ncement transistors. This de coder
produces a logical “0” at the output corresponding to a four
bit binary input from zero to ni ne, and a logical “1” at the
other outputs. For binar y inputs fro m ten to fiftee n all outputs are logical “1”.
Features
■ Supply voltage range: 3V to 15V
■ Tenth power TTL compatible: drive 2 LPTTL loads
■ High noise immunity: 0.45 V
CC
(typ.)
■ Low power: 50 nW (typ.)
■ Medium speed operation: 10 MHz (typ.) with 10V V
Applications
• Automotive
• Data terminals
• Instrumentation
• Medical electronics
• Alarm systems
• Industrial electronics
• Remote metering
• Computers
Ordering Code:
Order Number Package Number Package Description
MM74C42N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Connection Diagram
Pin Assignments for DIP
CC
Top View
© 1999 Fairchild Semiconductor Corporation DS005882.prf www.fairchildsemi.com
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Schematic Diagram
MM74C42
Truth Table
Inputs Outputs
DCBA0123456789
00000111111111
00011011111111
00101101111111
00111110111111
010011110 11111
01011111101111
01101111110111
01111111111011
10001111111101
10011111111110
10101111111111
10111111111111
11001111111111
11011111111111
11101111111111
11111111111111
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