SN74LS390DRG4 Dual 4-Bit Decade And Binary Counters

The SN74LS390DRG4 from Texas Instruments is a high-performance, dual 4-bit counter integrated circuit that combines both decade and binary counting capabilities. Designed with versatility in mind, it is a staple component in digital electronics, ideal for a wide range of counting applications including frequency division, time measurement, and digital clocks, among others.

This IC is part of the 74LS series, known for its low-power Schottky technology, which ensures efficient operation with a reduced power consumption compared to standard TTL logic. The SN74LS390DRG4 operates over a voltage range of 4.75V to 5.25V, making it suitable for typical 5V logic systems. With its dual counting functionality, it provides users with the flexibility of using either or both sections simultaneously.

The device features two individual counters, each composed of a divide-by-two section and a divide-by-five section, which can be connected in various configurations to achieve different counting modes. The divide-by-two section can be bypassed, enabling direct input to the divide-by-five section for decade counting, or both sections can be used together for binary counting up to 16 (2^4).

Each counter has a clear (CLR) input to reset the count to zero, and a clock (CLK) input to advance the count on the rising edge of the clock signal. Additionally, the SN74LS390DRG4 offers outputs from each stage, allowing for the implementation of custom count sequences and the development of more complex counting arrangements.

The SN74LS390DRG4 comes in a slim SOIC-16 package, which is surface-mountable, making it an excellent choice for applications where space is at a premium. Its robust design ensures reliability and durability, which, coupled with Texas Instruments' commitment to quality, makes this counter IC a trusted component for both hobbyists and professionals alike.

Whether you are designing a simple counter circuit or a complex digital system requiring precise counting and timing solutions, the SN74LS390DRG4 from Texas Instruments is an outstanding choice that offers performance, versatility, and reliability.