7490
Description
Each of these monolithic counters contains four masterslave flip-flops and additional gating to provide a divide-bytwo counter and a three-stage binary counter for which the count cycle length is divide-by-five for the 90A and divideby-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 plement applications
To use their maximum count length (decade or four-bit binary) the B input is connected to the QA output The input count pulses are applied to input A and the outputs are as described in the appropriate truth table A symmetrical divide-by-ten count can be obtained from the 90A counters by connecting the QD output to the A input and applying the input count to the B input which gives a divide-by-ten square wave at output QA
Features
Y Typical power dissipation 90A 145 m W 93A 130 m W
Y Count frequency 42 MHz
Connection Diagrams
Dual-In-Line Package
TL F 6533
- 1
Order Number DM5490J DM5490W...
