Description
The MM54HC4020 MM74HC4020 MM54HC4040 MM74HC4040 are high speed binary ripple carry counters These counters are implemented utilizing advanced silicongate CMOS technology to achieve speed performance similar to LS-TTL logic while retaining the low power and high noise immunity of CMOS The ’HC4020 is a 14 stage counter and the ’HC4040 is a 12stage counter Both devices are incremented on the falling edge (negative transition) of the input clock and all their outputs are reset to a low level by appl
Features
- Y Y Y Y Y
Typical propagation delay 16 ns Wide operating voltage range 2.
- 6V Low input current 1 mA maximum Low quiescent current 80 mA maximum (74HC Series) Output drive capability 10 LS-TTL loads
Connection Diagrams
Dual-In-Line Packages ’HC4020
TL F 5216.
- 1
’HC4040
TL F 5216.
- 3
Order Number MM54HC4020 4040 or MM74HC4020 4040
C1995 National Semiconductor Corporation
TL F 5216
RRD-B30M105 Printed in U S A
http://www. Datasheet4U. com
Absolute Maximum Ratings (No.