TC74VHC245F(EL,K,F

Overview

The TC74VHC245F is an octal bus transceiver from Toshiba's VHC series, designed for bidirectional data transmission between two buses. It features a single direction control input and an active-low enable input to isolate busses when disabled. The device utilizes CMOS technology to provide high-speed operation comparable to LSTTL while maintaining low power dissipation. It operates within a supply voltage range of 2.0V to 5.5V and includes protection circuits on all inputs against static discharge.

Feature Summary

• Bidirectional octal bus transceiver with common control
• High-speed CMOS logic performance
• Low power dissipation characteristics
• Input static protection circuits

Applications

• Two-way asynchronous communication between data busses
• Memory and memory mapping applications
• Signal buffering and level shifting in mixed-voltage systems

Procurement Notes

Verify the specific suffix (K or F) corresponds to the required package type, as these indicate different physical footprints such as SOP or TSSOP. Confirm RoHS compliance status through official datasheets. Check current product lifecycle status, as older logic families may be subject to obsolescence notices. Ensure ESD handling protocols are followed during storage and assembly.

Selection Notes

Select this component for applications requiring bidirectional data flow with minimal propagation delay. The wide supply voltage range allows compatibility with both 3.3V and 5V logic systems. Consider the package options based on PCB space constraints. Verify that the input voltage levels match the driving source to ensure proper logic threshold recognition across the operating temperature range.

Part Context

This part belongs to the 74VHC series of high-speed CMOS logic devices. It is functionally compatible with other industry-standard octal bus transceivers but offers Toshiba-specific electrical characteristics and packaging options. The VHC series is designed to bridge the performance gap between standard CMOS and LSTTL technologies.

Replacement Considerations

Direct pin-compatible substitutes include the SN74VHC245 from Texas Instruments and the MC74VHC245 from ON Semiconductor. When replacing, verify that the substitute device meets the same supply voltage and output current requirements. Package dimensions must be confirmed if mechanical fit is critical.