74VHCT574AFT

Overview

The Toshiba 74VHCT574AFT is an octal D-type flip-flop featuring 3-state outputs, manufactured using VHCT CMOS technology. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 140 MHz. The device exhibits a propagation delay of 5.6 ns with output drive capabilities of 8 mA for both high and low states. Packaged in a TSSOP-20 format, it functions reliably across an industrial temperature range from -40 °C to +125 °C and holds AEC-Q100 qualification.

Feature Summary

• VHCT CMOS technology ensures TTL-compatible input thresholds while maintaining low power consumption.
• Octal configuration provides eight independent D-type storage elements with synchronized clock control.
• Three-state outputs allow direct connection to bus systems without additional interface logic.
• Automotive-grade reliability achieved through AEC-Q100 qualification for harsh environment operation.

Applications

• High-speed data buffering in automotive electronic control units
• Parallel-to-serial conversion interfaces in communication modules
• General-purpose register banks in industrial logic circuits

Procurement Notes

Verify the specific suffix 'AFT' corresponds to the TSSOP-20 package and reel packaging configuration. Confirm AEC-Q100 automotive qualification status is required for the target application. Ensure the operating voltage aligns with the 4.5 V to 5.5 V specification. Check for RoHS compliance documentation if environmental regulations apply. Validate that the 125 °C maximum junction temperature meets thermal design requirements.

Selection Notes

Select this component when TTL-level compatibility is necessary alongside high-speed performance. The VHCT series bridges the gap between standard CMOS and LSTTL logic families. Consider the 140 MHz clock limit and 5.6 ns delay for timing-critical designs. The wide temperature range suits applications exceeding standard commercial limits. Compare against HC or HCT series if lower speed or different voltage ranges are acceptable.

Part Context

This part belongs to Toshiba's VHCT logic family, designed for high-speed digital applications requiring robust noise immunity. It complements other VHCT components like buffers and gates within system architectures. The 74VHCT574AFT specifically addresses needs for parallel data storage with bus-oriented output control. It serves as a key element in complex digital signal processing chains.

Replacement Considerations

Direct substitutes include the TC74VHCT574AFTEL variant, which shares identical electrical characteristics but may differ in packaging tape specifications. Verify pinout compatibility before substitution. Cross-reference with other manufacturers' VHCT equivalents only if electrical parameters match exactly.

FAQ

What is the input threshold voltage characteristic of the 74VHCT574AFT?

The device utilizes VHCT technology, providing input thresholds compatible with TTL logic levels while operating on CMOS supply voltages.

Does the 74VHCT574AFT support automotive applications?

Yes, the component is qualified according to the AEC-Q100 standard, making it suitable for automotive electronic environments.

How does the 3-state output function operate?

The outputs enter a high-impedance state when the output enable signal is inactive, allowing multiple devices to share a common bus line.