MC74VHCT259ADTG

Latches Overview

The MC74VHCT259ADTG is an 8-bit addressable latch fabricated with silicon gate CMOS technology, housed in a TSSOP-16 package. It operates within a DC supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -55 °C to +125 °C. The device features TTL-compatible inputs with a maximum low-level input voltage of 0.8 V and a minimum high-level input voltage of 2.0 V. Propagation delays are specified at 16 ns maximum at 3.3 V and 10 ns maximum at 5.0 V under typical load conditions. Quiescent supply current is limited to 4 µA maximum.

Latches Feature Summary

• Provides four operational modes including addressable latch, memory, one-of-eight decoding, and reset functions.
• Features power-down protection on inputs and outputs to prevent device destruction during supply mismatches or hot insertion.
• Delivers full 5.0 V CMOS level output swings suitable for interfacing between 3.3 V and 5.0 V systems.
• Ensures robust reliability with latchup performance exceeding 300 mA and ESD protection greater than 2000 V via Human Body Model.

Latches Applications

• General purpose data storage in digital systems
• Level conversion for interfacing 3.3 V logic to 5.0 V CMOS outputs
• Addressable latch applications requiring stable output states

Latches Procurement Notes

Verify the specific ordering suffix 'G' confirms the Pb-Free package status as documented in the manufacturer's ordering information. Confirm the TSSOP-16 package designation matches the required mechanical footprint for the target PCB layout. Ensure compliance with RoHS directives by checking the material composition documentation provided by onsemi. Validate that the component revision aligns with current production availability, noting potential discontinuation statuses for legacy variants.

Latches Selection Notes

Select this component when TTL-compatible input thresholds are required alongside CMOS low power dissipation characteristics. The VHCT series is appropriate for designs needing high noise immunity and stable outputs in general-purpose storage applications. Consider the wide operating temperature range if the environment exceeds standard commercial limits. Verify that the 8-line demultiplexing capability meets the system's addressing requirements without additional decoding logic.

Latches Part Context

This device belongs to the MC74VHCT259A family of 8-bit addressable latches. It is functionally compatible with other standard logic families while maintaining distinct CMOS electrical characteristics. The product line includes variations such as SOIC-16 packages and tape-and-reel options, all sharing the same core logical functionality and pinout configuration defined by the manufacturer.

Latches Replacement Considerations

Consult the manufacturer's discontinuation notice for available substitute part numbers. Cross-reference functional compatibility with other 8-bit addressable latches ensuring voltage levels and package dimensions match the existing design constraints.