MC74AC160/74ACT160 and MC74AC162/74ACT162 are high-speed synchronous decade counters operating in the BCD (8421) sequence. They are synchronously presettable for application in programmable dividers and have two types of Count Enable inputs plus a Terminal Count output for versatility in forming synchronous multistage counters. The MC74AC160/74ACT160 has an asynchronous Master Reset input that overrides all other inputs and forces the outputs LOW. The MC74AC162/74ACT162 has a Synchronous Reset input that overrides counting and parallel loading and allows all outputs to be simultaneously reset on the rising edge of the clock.
This document provides technical specifications for the MC74AC160/74ACT160 and MC74AC162/74ACT162, which are high-speed synchronous decade counters operating in the BCD (8421) sequence. These devices feature two types of Count Enable inputs plus a Terminal Count output for versatility in forming synchronous multistage counters.
| Typical Count Rate | 120 MHz |
|---|---|
| Outputs Source/Sink Current | 24 mA |
| Operating Ambient Temperature | -40 to +85 °C |
| Maximum Count Rate (3.3V) | 100 MHz |
Yes, the ACT160 and ACT162 variants have TTL compatible inputs.
The counters count modulo-10 in the BCD (8421) sequence, incrementing from state 9 to state 0.