SN74ACT574DW

Flip Flops Overview

The SN74ACT574DW is an octal edge-triggered D-type flip-flop from the Texas Instruments 74ACT series, housed in a 20-pin DIP package. It features non-inverting outputs with three-state capability and TTL-compatible inputs. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 11 ns at 5 V with 50 pF load, static current of 4 µA, and output drive currents of ±24 mA. It supports a maximum clock frequency of 110 MHz and functions across a temperature range of -40°C to +85°C.

Flip Flops Feature Summary

• Octal configuration providing eight independent D-type flip-flops in a single package
• Three-state outputs enable direct bus connections for efficient data routing
• TTL-compatible input structure ensures compatibility with standard logic families
• High-speed performance with 110 MHz clock frequency and 11 ns propagation delay

Flip Flops Applications

• Parallel-to-serial data conversion circuits
• Register file implementations in microprocessor systems
• I/O buffering and interface isolation between logic levels
• Timing control and synchronization in digital state machines

Flip Flops Procurement Notes

Verify the package type matches the required footprint, as the DW suffix indicates a 20-pin DIP while other variants use SOIC or TSSOP. Confirm RoHS compliance status if environmental regulations apply to the assembly process. Check for alternative suffixes like G4 which may denote specific manufacturing revisions or lead-free specifications. Ensure the supplier provides valid datasheets matching the exact part number to avoid functional mismatches due to series differences.

Flip Flops Selection Notes

Select this component when high-speed octal latching with three-state output control is required in through-hole designs. The ACT series offers faster switching than standard 74LS devices while maintaining pinout compatibility. Consider the 110 MHz limit for clock speeds and verify that the ±24 mA drive current meets load requirements. Evaluate thermal dissipation needs given the DIP package's thermal characteristics compared to surface-mount alternatives.

Flip Flops Part Context

This device belongs to the SN74ACT family, representing Advanced CMOS technology from Texas Instruments. It serves as a high-performance alternative to older bipolar logic families, offering reduced power consumption alongside improved speed. The octal flip-flop architecture is widely used in legacy and modern digital systems requiring parallel data storage with controlled output impedance.

Flip Flops Replacement Considerations

SN74ACT574DWR (SOIC-20 variant), SN74ACT574NSR (SOIC-20 variant), SN74ACT574N (PDIP-20 variant). Verify package dimensions and pin spacing before substitution.