MC74HC574AF

Flip Flops Overview

The MC74HC574AF is an octal D-type flip-flop manufactured by onsemi, featuring positive edge-triggered data storage and three-state outputs. It operates within a supply voltage range of 2.0 V to 6.0 V. The device exhibits a maximum propagation delay of 27 ns at 6 V with a 50 pF load. Output drive capability supports 15 LSTTL loads, with high and low output currents rated at 7.8 mA each. Static current consumption is 4 µA, and input capacitance is 10 pF. The component functions at clock frequencies up to 35 MHz and is housed in a 20-SOIC package.

Flip Flops Feature Summary

• Positive edge-triggered octal D-type flip-flop architecture for reliable data latching
• Three-state outputs allowing direct interfacing with CMOS, NMOS, and TTL logic families
• High-impedance state control via Output Enable input without affecting internal flip-flop states

Flip Flops Applications

• Parallel-to-serial data conversion circuits
• Register file implementations in digital systems
• Buffering and bus holding applications requiring tri-state isolation

Flip Flops Procurement Notes

Verify the specific suffix 'AF' against official datasheets, as standard listings often reference 'MC74HC574AFEL'. Confirm end-of-life status and lead times with authorized distributors. Ensure compatibility with existing PCB footprints and voltage levels before procurement.

Flip Flops Selection Notes

Select this component for designs requiring wide voltage operation between 2V and 6V. Consider the 27ns propagation delay for timing constraints. Verify that the 20-SOIC package fits the assembly requirements. Compare against active alternatives if long-term availability is critical.

Flip Flops Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It shares functional similarities with the HC374A but differs in pinout orientation to facilitate printed circuit board layout. It is compatible with standard CMOS outputs and LSTTL outputs when pull-up resistors are used.

Flip Flops Replacement Considerations

Public confirmed substitute: 74HC574D,653 (Nexperia USA Inc.). Verify pinout compatibility and electrical specifications before substitution.