74AHC259D-Q100J

Latches Overview

The 74AHC259D-Q100J is an automotive-qualified, high-speed Si-gate CMOS 8-bit addressable latch from the AHC series. It operates within a supply voltage range of 2.0 V to 5.5 V and supports ambient temperatures from -40 °C to +125 °C. The device integrates a 3-to-8 decoder with active HIGH outputs (Q0–Q7) and features Schmitt-trigger inputs for noise immunity. It provides four operational modes: addressable latch, memory, demultiplexer/decoder, and reset. Packaged in SO16 (SOT109-1), it combines serial-to-parallel capability with random data entry.

Latches Feature Summary

• Combines 8-bit storage with 3-to-8 decoding and multiplexing functions
• Features Schmitt-trigger inputs for enhanced noise immunity
• Supports multiple operational modes including latch, memory, and demux
• Includes common active LOW reset and enable inputs

Latches Applications

• General purpose digital system data storage
• Serial-to-parallel data conversion
• Active HIGH 8-channel demultiplexing or decoding
• Automotive electronic control units

Latches Procurement Notes

Verify that the specific suffix 'J' aligns with your required package variant, as the datasheet lists 'D' for SO16 and 'PW' for TSSOP16. Confirm the logic family matches your design needs, as this part belongs to the AHC series rather than AHCT. Ensure the component meets the specific temperature and voltage requirements for your target application environment before finalizing procurement.

Latches Selection Notes

Select this component when an integrated solution for both latching and decoding is required to minimize board space. The AHC logic family offers high speed and low power consumption suitable for modern digital systems. Verify compatibility with existing voltage levels, as the AHC input thresholds differ from TTL standards. Consider the SO16 package dimensions against available PCB real estate constraints.

Latches Part Context

This device is part of NXP's automotive-grade 74AHC logic portfolio, qualified to AEC-Q100 Grade 1 standards. It serves as a high-speed alternative to legacy Low-power Schottky TTL (LSTTL) devices while maintaining pin compatibility. The product line emphasizes reliability for harsh environments, offering balanced propagation delays and robust ESD protection capabilities across various packaging options.

Latches Replacement Considerations

Direct replacements include other 74AHC259 variants such as 74AHC259-Q100 or 74AHCT259-Q100, depending on whether CMOS or TTL input levels are required. Non-automotive equivalents like the standard 74AHC259 may be used if AEC-Q100 qualification is not mandatory.