MC74VHC259DTG

Latches Overview

The MC74VHC259DTG is an 8-bit addressable latch and 1-of-8 decoder fabricated with silicon gate CMOS technology. It operates within a supply voltage range of 2.0 V to 5.5 V and supports an operating temperature range from -55°C to +125°C. The device features LSTTL-compatible inputs, providing high noise immunity and protection against input voltages up to 7 V regardless of the supply level. Propagation delays are specified at 8.5 ns maximum at 3.3 V and 10.0 ns maximum at 5.0 V with a 50 pF load. Quiescent supply current is limited to 40.0 µA maximum across the full temperature range.

Latches Feature Summary

• Provides four operational modes: addressable latch, memory, 8-line demultiplexer, and reset.
• Features LSTTL-compatible inputs for interfacing with standard logic families.
• Includes power-down protection on inputs and outputs to prevent excessive current draw.
• Offers high noise immunity with defined low-level and high-level noise voltage thresholds.

Latches Applications

• General purpose data storage in digital systems
• Serial-to-parallel conversion using addressable latch mode
• Demultiplexing applications utilizing the 1-of-8 decoding function

Latches Procurement Notes

Verify that the ordering suffix DTG corresponds specifically to the TSSOP-16 package variant. Confirm RoHS compliance and lead-free status as indicated by the G suffix. Ensure the component meets the required operating temperature range of -55°C to +125°C for your specific application environment. Check for any discontinuation notices or recommended new design alternatives provided by the manufacturer.

Latches Selection Notes

Select this component when an 8-bit addressable latch or demultiplexer is required with wide voltage compatibility. The TSSOP-16 package is suitable for surface-mount assembly where space constraints exist. Consider the propagation delay specifications relative to your system clock speed. Verify that the input voltage levels align with your source logic family, particularly if interfacing with 5 V circuits while operating at lower supply voltages.

Latches Part Context

This part belongs to the MC74VHC259 series of 8-bit addressable latches manufactured by onsemi. It is designed to replace equivalent Bipolar Schottky TTL devices while maintaining CMOS low power dissipation characteristics. The device is pin and function compatible with other standard logic families, facilitating direct upgrades in existing designs.

Latches Replacement Considerations

The datasheet notes that this device is discontinued and not recommended for new designs. Contact onsemi representatives for information on alternative parts. No specific substitute part numbers are listed in the provided documentation.