The 74HC/HCT393 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT393 are 4-bit binary ripple counters with separate clocks (1CP and 2 CP) and master reset (1MR and 2MR) inputs to each counter.
This document is a product specification datasheet for the Philips 74HC/HCT393, a dual 4-bit binary ripple counter. The device consists of two 4-bit counters with individual clocks and master resets, designed to be pin-compatible with low power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard no. 7A.
| Product Type | Dual 4-bit binary ripple counter |
|---|---|
| Output Capability | standard |
| IC Category | MSI |
| Maximum Clock Frequency (HC) | 99 MHz |
| Operating Temperature Range (HC) | -40 to +85 °C |
The master resets are active-HIGH asynchronous inputs that override the clock and set the outputs LOW.
The counters are triggered by a HIGH-to-LOW transition of the clock inputs.