SN74HC259N

Overview

The SN74HC259N is an 8-bit addressable latch manufactured by Texas Instruments in the HC logic series. It features a serial-in/parallel-out architecture within a single circuit configuration, housed in a PDIP-16 package with non-inverting polarity. The device operates on a power supply voltage ranging from 2 V to 6 V. Propagation delay varies based on voltage: 130 ns at 2 V, 26 ns at 4.5 V, and 22 ns at 6 V. Static current consumption is 8 uA. Output drive capabilities include a low-level output current of 32 mA and a high-level output current of -5.2 mA.

Feature Summary

• Provides eight individually addressable outputs controlled via a three-bit address input.
• Accepts serial data input for storage into any of the eight latches simultaneously upon activation.
• Maintains stored output states independently of subsequent input changes until new data is addressed.

Applications

• Parallel data expansion from serial communication interfaces
• Address decoding in microprocessor systems
• Control signal distribution for peripheral devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm pinout compatibility and electrical characteristics. Ensure the selected variant matches the required package type and temperature range for the intended application environment before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring parallel data expansion from a serial source or when independent control of multiple output lines is necessary. Consider the propagation delay specifications relative to system clock speeds and ensure the operating voltage aligns with the available power supply rails.

Part Context

This part belongs to the SN74HC259 family of addressable latches produced by Texas Instruments. It serves as a standard solution for converting serial data streams into parallel outputs or for managing discrete control signals in digital logic applications.

Replacement Considerations

SN74HC259NE4 is a verified equivalent offering identical functionality and specifications with RoHS compliance adjustments.