The 74HC/HCT390 is a high-speed dual 4-bit decade ripple counter. It has two BCD decade or bi-quinary counters, one package can be configured to divide-by-2, 4, 5, 10, 20, 25, 50 or 100. Two master reset inputs can clear each decade counter individually. Output capability: standard. ICC category: MSI.
The Philips 74HC/HCT390 is a high-speed Si-gate CMOS device designed as a dual decade or bi-quinary counter. It contains two 4-bit counters divided into four separately clocked sections, allowing for various counting configurations within a single package. The device is pin compatible with low power Schottky TTL (LSTTL) and complies with JEDEC standard no. 7A.
| Device Type | Dual decade ripple counter |
|---|---|
| Configuration Options | Two BCD decade or bi-quinary counters |
| Divide-by Configurations | 2, 4, 5, 10, 20, 25, 50 or 100 |
| Reset Inputs | Two master reset inputs |
| Output Capability | Standard |
| Logic Family Category | MSI |
The device supports two BCD decade or bi-quinary counters, and can be configured to divide-by 2, 4, 5, 10, 20, 25, 50 or 100.
The master reset inputs are active HIGH asynchronous inputs that override the clocks and set the four outputs LOW.