74HCT390 Overview
74HCT390 is a dual 4-bit decade ripple counter divided into four separately clocked sections. The counters have two divide-by-2 sections and two divide-by-5 sections. These sections share an asynchronous master reset input (nMR) and can be used in a BCD decade or bi-quinary configuration.
74HCT390 Key Features
- Input levels
- For 74HC390: CMOS level
- For 74HCT390: TTL level
- Two BCD decade or bi-quinary counters
- Two master reset inputs to clear each decade counter individually
- Supply voltage range from 4.5 V to 5.5 V
- High noise immunity
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
- plies with JEDEC standard JESD7A (4.5 V to 5.5 V)
- ESD protection
