SN74LS590DR 8-Bit Binary Counters with Output Registers from Texas Instruments

The SN74LS590DR is a high-performance, 8-bit binary counter with a storage register and 3-state outputs designed by Texas Instruments. This integrated circuit is part of the 74LS series, known for its low-power Schottky technology, which ensures efficient operation with minimal power consumption.

The device features an 8-bit binary counter that has an internal carry lookahead for cascading purposes in high-speed counting applications. The counter advances on the positive edge of the clock signal when the count enable input is in the low state. A ripple carry output is provided to enable cascading of multiple counters for extended counting ranges, making it an ideal choice for applications requiring complex multi-digit counting.

The SN74LS590DR also includes an output register that captures the counter's value with a parallel load input, allowing the counter to be used in a variety of applications, such as frequency division, event counting, and time measurement. The register can be triggered by either a low-to-high transition at the Gated Load Control input or the rising edge of the clock, providing flexibility in timing control.

The device's 3-state outputs can be placed in a high-impedance state, effectively disconnecting the output from the rest of the circuit. This feature is particularly useful in bus-oriented systems, where multiple outputs need to share the same connection lines without interfering with each other.

Manufactured in a small-outline package, the SN74LS590DR is optimized for space-constrained applications. It is designed to operate over a broad voltage range of 4.5V to 5.5V and is characterized for operation from 0°C to 70°C, making it suitable for commercial-grade applications.

In summary, the SN74LS590DR from Texas Instruments is a versatile and reliable component for digital counting applications. Its fast counting speeds, output register for parallel data access, and 3-state outputs make it a robust choice for designers looking for a counter with flexible interfacing capabilities.