74LS90 - Decade, Divide-by-Twelve and Binary Counter
Description:
The 74HC73 is a high-speed Si-gate CMOS device and is pin compatible with low-power Schottky TTL (LSTTL). The 74HC73 is specified in compliance with JEDEC standard no. 7A.
The 74HC is a dual negative-edge triggere..
CD4040 - 12-Stage Ripple Carry Binary Counters
Features:
Wide supply voltage range: 3.0V to 15V
High noise immunity: 0.45 VDD (Typ.)
Low power TTL compatibility: Fan out of 2 driving 74L
or 1 driving 74LS
Medium speed operation: 8MHz typ. at VDD=10V
Schmitt trigger clock..