DM5490/DM7490A/DM7493A Decade and Binary Counters
This document provides technical specifications for the DM5490/DM7490A and DM7493A monolithic counters. These devices contain four master-slave flip-flops with additional gating to provide divide-by-two and divide-by-five or divide-by-eight count cycles. The DM7490A includes gated set-to-nine inputs for BCD nine's complement applications.
| Typical Power Dissipation (DM7490A) | 145 mW |
|---|---|
| Typical Power Dissipation (DM7493A) | 130 mW |
| Maximum Clock Frequency (Input A) | 32 MHz |
| Maximum Clock Frequency (Input B) | 16 MHz |
| Supply Voltage (Nominal) | 5 V |
| 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.
The maximum clock frequency for input A is 32 MHz.