SN74HCT574NG4

Flip Flops Overview

The SN74HCT574NG4 is an octal edge-triggered D-type flip-flop with three-state outputs manufactured by Texas Instruments. It operates within a 4.5 V to 5.5 V supply voltage range and features TTL-compatible inputs. The device provides large current tri-state non-inverting outputs capable of driving bus lines or up to 15 LSTTL loads, with typical output drive currents of ±6 mA at 5 V. Key electrical parameters include a maximum propagation delay of 47 ns at 5.5 V with 150 pF load, a maximum clock frequency of 40 MHz, and low power consumption with a maximum ICC of 80 µA.

Flip Flops Feature Summary

• Octal edge-triggered D-type flip-flop architecture with three-state outputs designed for bus-driven applications
• TTL-compatible input logic levels ensuring compatibility with standard digital systems
• High-current tri-state non-inverting outputs suitable for direct bus line driving

Flip Flops Applications

• Buffer registers
• I/O ports
• Bidirectional bus drivers
• Working registers

Flip Flops Procurement Notes

Verify the specific suffix 'G4' against the manufacturer's official documentation to confirm RoHS compliance status and exact pinout configuration. Ensure the selected package variant matches the required through-hole mounting specifications for the target PCB design. Cross-reference the datasheet revision date to validate parameter accuracy before finalizing component selection.

Flip Flops Selection Notes

Select this component when designing systems requiring octal data storage with high-speed performance and bus interface capabilities. The TTL-compatible inputs simplify integration with legacy logic families. Consider the 40 MHz maximum clock frequency and 47 ns propagation delay for timing-critical applications. Verify that the 20-pin PDIP package fits the available board space and thermal requirements.

Flip Flops Part Context

This part belongs to the SN74HCT574 family of octal D-type flip-flops. It is functionally similar to the SN74HC574 but utilizes HCT logic technology for TTL input compatibility. The NG4 designation indicates a specific package and compliance variant within the broader Texas Instruments logic product line, distinct from the PW (TSSOP) or N (PDIP) base part numbers.

Flip Flops Replacement Considerations

The SN74HCT574N is listed as a recommended substitute by the manufacturer. Verify pin compatibility and electrical specifications before substitution.