Part Number : 7493, DM7490A, DM7493A
Function : Decade and Binary Counters
Manufactures : Fairchild
Each of these monolithic counters contains four master-slave flip-flops and addtional gating to provide a divide-by-two counter and a three-stage binary counter for which the count cycle length is divide-by-five for the 90A and divide-by-eight for the 93A.
All of these counters have a gated zero reset and the 90A also has gated set-to-nine inputs for use in BCD nine’s complement applications.
1. Typical power dissipation
(1) 90A 145mW
(2) 93A 130mW
2. Count frequency 42 Mhz