This document is a datasheet for the DM5490/DM7490A and DM7493A monolithic counters. These devices contain four master-slave flip-flops and additional gating to provide a divide-by-two counter and a three-stage binary counter. The DM7490A offers a divide-by-five count cycle, while the DM7493A provides a divide-by-eight cycle. Both counters feature a gated zero reset, and the 90A version includes gated set-to-nine inputs for BCD nine's complement applications.
| Supply Voltage (Nominal) | 5 V |
|---|---|
| Maximum Clock Frequency (Input A) | 32 MHz |
| Typical Power Dissipation (DM7490A) | 145 mW |
| Typical Power Dissipation (DM7493A) | 130 mW |
| Operating Temperature Range (DM54) | -55°C to +125°C |
The count cycle length is divide-by-five for the 90A.
The count cycle length is divide-by-eight for the 93A.
Yes, the 90A also has gated set-to-nine inputs for use in BCD nine's complement applications.