74LCX74MX

Overview

The 74LCX74MX is a dual positive-edge triggered D flip-flop manufactured by Fairchild Semiconductor, belonging to the 74LCX low-voltage CMOS logic series. It features complementary outputs and operates within a supply voltage range of 2V to 3.6V. The device integrates set (preset) and reset functions for each flip-flop element. Packaged in a compact 14-TSSOP surface-mount format with a width of 4.40mm, it supports industrial operating temperatures from -40°C to +85°C. Key electrical characteristics include a maximum propagation delay of 7ns at 3.3V with 50pF load capacitance, output drive currents of ±24mA, and a maximum static current of 10µA.

Feature Summary

• Dual positive-edge triggered D-type flip-flops with complementary outputs
• Integrated set (preset) and reset control functions
• Low voltage operation compatible with 2V to 3.6V power supplies
• High noise immunity and EMI suppression capabilities

Applications

• Parallel-to-serial data conversion circuits
• Shift register implementations
• Timing and synchronization logic modules
• General-purpose digital storage elements

Procurement Notes

Verify that the specific part number suffix corresponds to the desired tape-and-reel packaging configuration, as standard bulk packaging may differ. Confirm manufacturer origin, noting that production rights for the 74LCX series have transitioned from Fairchild Semiconductor to onsemi; ensure the component matches the required brand labeling and datasheet version for your design specifications. Check RoHS compliance status and moisture sensitivity level ratings prior to assembly.

Selection Notes

Select this component when designing systems requiring dual independent D flip-flops with active-high clocking and complementary outputs. It is suitable for applications needing fast switching speeds under low voltage conditions, specifically where propagation delays around 7ns are acceptable. Ensure the system voltage remains within the 2V to 3.6V range to maintain optimal performance and avoid exceeding absolute maximum ratings.

Part Context

This device is part of the broader 74LCX family of low-voltage CMOS logic integrated circuits. It shares functional similarities with other dual flip-flop variants like the 74LCX74MTC but differs in package type and specific manufacturing lot details. The MX suffix typically denotes a specific reel or tape configuration intended for automated surface-mount assembly processes.

Replacement Considerations

The 74LCX74MTCX is a documented substitute part number offering identical logical functionality in a TSSOP package. Other potential replacements include SN74LVC74ADBR, though voltage tolerances and pin configurations must be verified against the original design requirements before substitution.