CD54HC75F3A

Latches Overview

The CD54HC75F3A is a dual 2-bit bistable transparent latch from the HC series, manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports an operating temperature range of -55°C to 125°C. The device features buffered inputs and outputs with high noise immunity. Propagation delays vary based on voltage and load; for example, at 4.5V with 50pF load, data-to-Q delay ranges from 22ns to 33ns across temperatures. Input leakage current is specified at ±1µA maximum.

Latches Feature Summary

• Dual 2-bit bistable transparent latches with separate active LOW enable inputs
• Buffered inputs and outputs providing standard and bus driver fanout capabilities
• High noise immunity with defined input thresholds relative to VCC
• Significant power reduction compared to LSTTL logic families

Latches Applications

• Military and defense applications requiring QML certification
• Data storage and buffering in high-speed CMOS logic systems
• Transparent latch circuits for temporary data retention
• Bus driver interfaces compatible with LSTTL loads

Latches Procurement Notes

Verify the complete part number including suffixes when ordering, as they denote specific packaging or material variations. Confirm RoHS compliance status and lead finish options via the latest Package Option Addendum. Ensure handling procedures account for electrostatic discharge sensitivity inherent to CMOS technology. Cross-reference military specifications if environmental ratings are critical for the intended deployment environment.

Latches Selection Notes

Select the HC variant for operation between 2V and 6V, ensuring compatibility with system voltage levels. Choose HCT variants only if direct LSTTL input compatibility is required within a 4.5V to 5.5V range. Verify package availability, as the F3A suffix indicates a 16-lead CERDIP package suitable for through-hole mounting. Check switching specifications against system timing requirements, particularly setup and hold times under varying load conditions.

Latches Part Context

This component belongs to the CD54HC75 family, which includes catalog and military qualified versions. The CD54 prefix denotes military-grade reliability, while the HC suffix identifies High-Speed CMOS technology. Related parts include CD54HCT75F3A for TTL-compatible inputs and commercial variants like CD74HC75E in different packages. The family shares functional descriptions but differs in electrical characteristics and packaging options.

Latches Replacement Considerations

CD54HCT75F3A serves as a direct replacement if LSTTL input compatibility is needed within the same package. Commercial equivalents such as CD74HC75E offer similar functionality in PDIP packages but lack military qualification. Verify pinout compatibility and ensure voltage ranges match application requirements before substituting.