This is a kind of TTL.
Part Number: 7493
Function: Decade and Binary Counter
Package: DIP, SOP 14 Pin Type
Manufacturer: National ( Texas Instruments )
This is Decade and Binary Counter.
Each of these monolithic counters contains four master slave flip-flops and additional 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) 7490A 145 mW
(2) 7493A 130 mW
2. Count frequency 42 MHz
Acquired by Texas Instruments on September 23rd, 2011.
Other data sheets are available within the file: 7490A, 7493A, DM5490, DM5490J