CD74AC574E

Overview

The CD74AC574E is an octal D-type flip-flop manufactured by Texas Instruments, belonging to the AC logic series. It features eight non-inverting circuits with three-state outputs and CMOS inputs. The device operates within a supply voltage range of 2 V to 6 V and supports through-hole mounting in a PDIP-20 package. Key electrical parameters include a propagation delay of 135 ns, high-level output current of -24 mA, and low-level output current of 24 mA. It functions reliably across an extended temperature range from -55 °C to +125 °C.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops for parallel data storage
• Three-state outputs enable direct connection to bus systems without additional buffering
• CMOS input structure ensures compatibility with standard digital logic interfaces
• Non-inverting polarity maintains signal directionality between input and output

Applications

• Parallel-to-serial data conversion circuits
• Bus-oriented memory register implementations
• General-purpose storage elements in digital control systems
• Data latching applications requiring tri-state isolation

Procurement Notes

Verify that the component matches the specific CD74AC574E designation rather than variant suffixes which may alter packaging or specifications. Confirm the PDIP-20 through-hole package requirement aligns with the target PCB layout. Ensure the AC logic family characteristics meet the system's voltage and speed requirements before finalizing procurement orders.

Selection Notes

Select this component when an octal storage solution with tri-state capability is required for through-hole assembly. The AC series offers a balance of speed and power consumption suitable for general-purpose applications. Consider the 135 ns propagation delay against system timing constraints. Verify that the 2 V to 6 V operating range covers all intended supply voltages in the design.

Part Context

This part belongs to the Texas Instruments CD74AC574 series of octal D-type flip-flops. It shares functional similarities with other members like the CD74AC374E but differs in pinout and internal circuit configuration. The AC series represents a high-speed CMOS technology distinct from HC or ACT families, offering specific performance characteristics defined by its internal architecture.

Replacement Considerations

SN74AC574DWE4