TC74VHCT245AFTEL

Overview

The TC74VHCT245AFTEL is an octal bus transceiver from the 74VHCT series, manufactured by Toshiba Semiconductor and Storage. It features a 20-pin TSSOP package with bidirectional data transmission capabilities. The device operates within a supply voltage range of 4.5 V to 5.5 V. It provides three-state outputs and accepts TTL input levels while delivering CMOS/TTL output levels. Key electrical parameters include a maximum propagation delay of 8.7 ns at specified load conditions, a maximum high-level output current of -8 mA, and a maximum low-level output current of 8 mA. The component supports an operating temperature range from -40°C to 125°C.

Feature Summary

• Provides bidirectional data transmission between two busses controlled by a direction input signal.
• Features three-state outputs that allow effective isolation of busses when the enable input is deactivated.
• Compatible with standard 5V logic systems through TTL-compatible input thresholds.

Applications

• Two-way asynchronous communication between data busses
• Memory bus interfaces in 5V logic systems
• General-purpose bidirectional data routing

Procurement Notes

Verify the specific suffix 'TEL' indicates tape and reel packaging configuration as documented. Confirm the part status is active or obsolete based on the latest manufacturer release notes. Ensure the 20-pin TSSOP footprint matches the target PCB design constraints. Cross-reference the AEC-Q100 automotive qualification status if required for the specific application environment.

Selection Notes

Select this component when a bidirectional octal transceiver with TTL-compatible inputs is required for 5V systems. The VHCT series offers speed comparable to LSTTL while maintaining CMOS power dissipation characteristics. Consider the 8.7 ns propagation delay and 8 mA drive capability for signal integrity requirements. Verify the TSSOP-20 package dimensions against available board space.

Part Context

This component belongs to the TC74VHCT family of high-speed CMOS digital integrated circuits fabricated using silicon gate C2MOS technology. The family includes variants such as the TC74HC245 and TC74ACT245, which differ in speed and voltage compatibility. The TC74VHCT245 specifically bridges the gap between HC speed and HCT input compatibility.

Replacement Considerations

The TC74HC245AF(F) serves as a related variant within the same product line but utilizes HC logic levels rather than VHCT TTL-compatible inputs. Substitution requires verification of input threshold compatibility with the driving circuitry. Other family members like the TC74ACT245 offer different performance characteristics.