PHILIPS 74HC/HCT390 Dual decade ripple counter handbook

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.