M74HC574TTR

Flip Flops Overview

The M74HC574TTR is an octal D-type positive edge-triggered flip-flop manufactured by STMicroelectronics. It features eight independent D-type registers with tri-state outputs, housed in a 20-SOIC package. The device operates within a supply voltage range of 2V to 6V and supports a maximum clock frequency of 90 MHz. Key electrical parameters include a maximum propagation delay of 32ns at 6V with 150pF load, output currents of ±7.8mA, and a static current of 4µA. It functions across a temperature range of -55°C to 125°C.

Flip Flops Feature Summary

• Octal D-type positive edge-triggered flip-flop architecture
• Tri-state non-inverting outputs for bus-oriented applications
• Wide operating voltage range from 2V to 6V
• High noise immunity with ESD protection circuits

Flip Flops Applications

• Bus-oriented memory mapping
• Shift register data storage
• Parallel-to-serial conversion circuits
• General-purpose digital logic buffering

Flip Flops Procurement Notes

This component is officially obsolete and no longer manufactured by STMicroelectronics. Sourcing new original units is not possible through standard distribution channels. Verification must focus on identifying valid direct substitutes or checking remaining legacy stock carefully. Ensure replacement components match the required pinout and electrical specifications to maintain system integrity without requiring board redesign.

Flip Flops Selection Notes

Select this part only if existing designs are locked to the 20-SOIC form factor and HC logic levels. Consider alternatives like SN74HC574DWR or MC74HC574ADWG for active availability. Verify that the 2V to 6V supply range and 90 MHz speed meet specific application requirements. Check compatibility with downstream logic families regarding voltage thresholds and drive strength capabilities before finalizing the design.

Flip Flops Part Context

The M74HC574TTR belongs to the 74HC series of high-speed CMOS logic devices. It provides octal storage functionality commonly used in microprocessor systems. The 'TTR' suffix indicates tape-and-reel packaging suitable for automated assembly processes. This component is part of a broader family of flip-flops designed for general-purpose digital applications requiring reliable data retention and fast switching speeds.

Flip Flops Replacement Considerations

Direct substitute part numbers include SN74HC574DWR (Texas Instruments), CD74HC574M96 (Texas Instruments), MC74HC574ADWG (onsemi), and MC74HC574ADWR2G (onsemi). These alternatives offer compatible logic functions and pinouts.