This document describes the features and characteristics of the 74HC/HCT393 dual 4-bit binary ripple counter, including two 4-bit binary counters with individual clocks, the ability to divide-by any binary module up to 28 in one package, two master resets to clear each 4-bit counter individually, standard output capability, and belonging to the MSI category.
The 74HC/HCT393 are high-speed Si-gate CMOS devices containing two 4-bit binary counters with individual clocks. They feature separate master reset inputs for each counter and are specified in compliance with JEDEC standard no. 7A.
These devices operate as ripple counters triggered by a HIGH-to-LOW transition of the clock inputs, with outputs internally connected to provide clock inputs to succeeding stages. The counters can divide by any binary module up to 28 within a single package.
| Device Type | Dual 4-bit binary ripple counter |
|---|---|
| Technology | High-speed Si-gate CMOS |
| Clock Inputs | Two separate clocks (1 CP and 2 CP) |
| Reset Type | Master reset inputs (active HIGH) |
| Max Clock Frequency (HC) | 99 MHz |
| Max Clock Frequency (HCT) | 27 MHz |
| Supply Voltage Range (HC) | +25 V to +6.0 V |
| Supply Voltage Range (HCT) | +4.5 V |
The counters are triggered by a HIGH-to-LOW transition of the clock inputs.
It can divide by any binary module up to 28 in one package.
The master resets are active-HIGH asynchronous inputs.