TC74VHCT574AFT(ELM

Overview

The TC74VHCT574AFT(ELM is an octal D-type flip-flop manufactured by Toshiba Semiconductor and Storage. It belongs to the VHCT logic series, utilizing CMOS technology with VHS-TTL compatible inputs. The device features eight positive-edge-triggered D-type flip-flops with three-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V. The component is housed in a 20-TSSOP package. Key electrical parameters include a propagation delay of 5.6 ns and a maximum clock frequency of 140 MHz. Output drive capabilities are specified at 8 mA for both high and low states. The device supports an operating temperature range from -40°C to +125°C and holds AEC-Q100 qualification.

Feature Summary

• Provides VHS-TTL level compatibility for direct interfacing with TTL circuits while maintaining CMOS power efficiency.
• Features three-state outputs that allow direct connection to bus lines without external buffer drivers.
• Includes internal input protection circuits designed to withstand static discharge and transient excess voltages.

Applications

• High-speed data storage and buffering in digital systems
• Bus-oriented memory register applications
• Clock domain synchronization circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging configuration. Confirm that the required AEC-Q100 automotive qualification aligns with the target application environment. Check for any lead time variations associated with the specific tape and reel or cut tape format requested. Ensure the voltage supply constraints match the system design requirements before finalizing procurement.

Selection Notes

Select this component when VHS-TTL input compatibility is required alongside high-speed CMOS performance. The VHCT series offers faster switching speeds compared to standard HC logic while maintaining similar power characteristics. Consider the 20-TSSOP package size for space-constrained surface-mount designs. Verify that the 140 MHz maximum clock frequency meets the timing requirements of the target application.

Part Context

This part is part of Toshiba's VHCT logic family, which bridges the gap between standard CMOS and TTL logic families. The VHCT series is designed to provide high-speed operation with low power consumption. It serves as a modern replacement for older discrete logic solutions in complex digital designs requiring reliable data latching and bus driving capabilities.

Replacement Considerations

Direct substitutes may include other VHCT series octal flip-flops from Toshiba or equivalent parts from other manufacturers offering VHCT-compatible logic levels. Verify pinout compatibility and electrical specifications before substitution.

FAQ

What is the input voltage compatibility of the TC74VHCT574AFT(ELM?

The device features VHS-TTL compatible inputs, allowing it to interface directly with TTL logic signals while operating on CMOS supply voltages.

Does the TC74VHCT574AFT(ELM have output enable control?

Yes, the device includes an output enable input (OE) that controls the three-state outputs, allowing them to be disconnected from the bus when not in use.