74LS90 DIP Decade Counter IC (14-Pin TTL BCD Counter IC)

The 74LS90 DIP Decade Counter IC is a TTL logic integrated circuit that functions as a divide-by-10 (decade) ripple counter in a 14-pin Dual Inline Package (DIP). Built using Low Power Schottky (LS) TTL technology, it combines a divide-by-2 and a divide-by-5 counter section to provide efficient BCD counting and frequency division.

The 74LS90 is widely used in digital counters, frequency dividers, clock circuits, event counters, instrumentation, embedded systems, and industrial automation. It features asynchronous reset and preset inputs, allowing flexible counter initialization and operation.

Key Features -

• Decade (divide-by-10) ripple counter

• Internal divide-by-2 and divide-by-5 sections

• Binary Coded Decimal (BCD) output

• Asynchronous reset and preset inputs

• TTL compatible logic levels

• Low Power Schottky (LS) technology

• 14-pin DIP package

• High-speed counting performance

• Compatible with 74LS series logic ICs

• Suitable for counting and frequency division applications

Specifications -

• Product type - TTL Counter IC

• IC model - 74LS90

• Logic function - Decade Counter (Divide-by-10 Counter)

• Logic family - 74LS TTL

• Package type - DIP-14

• Operating voltage - 5V DC

• Counter type - Asynchronous Ripple Counter

• Count sequence - BCD (0 to 9)

• Reset type - Asynchronous Reset and Preset Inputs

• Mounting type - Through Hole (THT)

• Operating temperature - Standard Commercial Range

Applications -

• Digital counters

• Frequency divider circuits

• Digital clocks and timers

• Event counting systems

• Instrumentation equipment

• Embedded systems

• Industrial automation systems

• Educational electronics projects

• Prototype PCB development

• DIY electronics projects