SN74AHCT74DR

Flip Flops Overview

The SN74AHCT74DR is a dual positive-edge-triggered D-type flip-flop from Texas Instruments, belonging to the AHCT logic series. It features CMOS outputs and TTL-compatible inputs, housed in a 14-pin SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 8.8 ns, with output drive capabilities of -8 mA for high level and 8 mA for low level. It supports surface-mount installation and functions across an industrial temperature range of -55°C to +125°C.

Flip Flops Feature Summary

• Dual positive-edge-triggered D-type flip-flops with independent clock, data, preset, and clear inputs.
• TTL-compatible inputs allow direct interfacing with TTL logic sources without external pull-ups.
• CMOS outputs provide strong drive capability suitable for loading multiple logic inputs.

Flip Flops Applications

• Parallel-to-serial and serial-to-parallel data conversion circuits
• Shift register implementations for data storage and transfer
• Frequency division and timing control logic

Flip Flops Procurement Notes

Verify the specific suffix 'DR' corresponds to the SOIC-14 package and tape-and-reel packaging configuration. Confirm that the component meets RoHS compliance requirements for your assembly process. Ensure the operating temperature range aligns with your system's environmental specifications. Cross-reference the manufacturer part number with official Texas Instruments documentation to validate authenticity and revision status before procurement.

Flip Flops Selection Notes

Select this component when TTL input compatibility is required alongside CMOS output performance. The AHCT series bridges the gap between older TTL systems and modern CMOS technologies. Consider the SOIC-14 package for space-constrained surface-mount designs. Evaluate the 8.8 ns propagation delay against your system's maximum clock frequency requirements to ensure signal integrity and timing margins are maintained.

Flip Flops Part Context

This device is part of the SN74AHCT family, designed for high-speed digital applications requiring robust noise immunity. It serves as a fundamental building block for sequential logic circuits. The 'D' indicates the standard commercial grade, while 'R' denotes reel packaging. It complements other AHCT logic gates and flip-flops for complex digital system integration.

Flip Flops Replacement Considerations

SN74AHCT74DRG4 is a lead-free variant with identical electrical characteristics and pinout. SN74AHCT74N offers a through-hole DIP-14 alternative for prototyping or legacy board upgrades. SN74AHCT74PW provides a TSSOP-14 package option for higher density surface-mount applications.