Texas Instruments 74HC390 Dual 4-Bit Decade Ripple Counter IC (74390 IC) DIP-16 Package Tactile Switch Externally programmable accurate current limit

Externally programmable accurate current limit

which drives ten separate comparators

These are Carbon Film Resistor with a value of 56 ohm 1/8W and tolerance of ±5%

Over-temperature thermal shutdown

The module is powered by a 12V DC source

Texas Instruments 74HC390 Dual 4-Bit Decade Ripple Counter IC (74390 IC) DIP-16 Package Tactile Switch Externally programmable accurate current limit74HC series ICs are High speed logic gates with very low power consumption that utilize advanced silicon gate CMOS technology and 74HC390 is one of them. 74HC390 ICs is a dual decade counter which contains two independent ripple counters. The counter has four separate sections. The counter has two divide by 2 sections and two divide by 5 sections. Divide by 2 sections share a common asynchronous master reset input ( 1MR ) and divide by 5 sections also