October 1987
Revised January 1999
MM74C42
BCD-to-Decimal Decoder
General Description
The MM74C42 one-of-ten decoder is a monolithic comple-
mentary MOS (CMOS) integrated circuit constructed with
N- and P-channel enhancement transistors. This decoder
produces a logical “0” at the output corresponding to a four
bit binary input from zero to nine, and a logical “1” at the
other outputs. For binary inputs from ten to fifteen all out-
puts are logical “1”.
Features
s Supply voltage range: 3V to 15V
s Tenth power TTL compatible: drive 2 LPTTL loads
s High noise immunity: 0.45 VCC (typ.)
s Low power: 50 nW (typ.)
s Medium speed operation: 10 MHz (typ.) with 10V VCC
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
Top View
© 1999 Fairchild Semiconductor Corporation DS005882.prf
www.fairchildsemi.com