TC74LCX245F(EL,K,F

Overview

The TC74LCX245F is a low-voltage octal bus transceiver manufactured by Toshiba Semiconductor and Storage. It operates within a power supply voltage range of 1.65 V to 3.6 V, supporting bidirectional data transmission between two buses. The device features 5-V tolerant inputs and outputs, allowing safe interfacing with 5-V systems while powered by lower voltages. It provides high-speed operation with a maximum propagation delay of 7.0 ns at 3.0 V to 3.6 V. The component includes power-down protection on all inputs and outputs and offers an output current capability of 24 mA minimum at 3.0 V.

Feature Summary

• Bidirectional interface capability between 5.0 V and 3.3 V signal levels
• Power-down protection provided on all inputs and outputs
• Pin and function compatibility with the 74 series 245 type logic families

Applications

• Low-voltage (3.3 V) system applications requiring high-speed operation
• Interfacing between 5.0 V and 3.3 V signals in bidirectional communication
• Two-way asynchronous communication between data busses

Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the TC74LCX245F is available in JEITA SOP and VSSOP (US) formats. Confirm compliance with environmental standards such as RoHS if applicable to your region. Ensure that unused inputs are tied to either VCC or GND to maintain normal operation and prevent undefined states. Review the absolute maximum ratings to avoid exceeding limits during handling or installation.

Selection Notes

Select this component when designing for low-voltage environments requiring robust 5-V tolerance on both input and output pins. It is suitable for applications needing high-speed data transfer with minimal power dissipation. Consider the package availability in SOP and VSSOP formats based on board space constraints. Ensure the design accounts for the specified propagation delays and output drive currents to meet timing requirements.

Part Context

The TC74LCX245F belongs to the LCX series of CMOS digital integrated circuits from Toshiba. This series is designed for low-voltage applications, offering performance comparable to higher voltage logic families while maintaining low power consumption. The device is part of a broader family of bus transceivers intended for various digital logic applications requiring bidirectional data flow.

Replacement Considerations

The datasheet notes pin and function compatibility with the 74 series 245 type logic families, including 74AC, VHC, HC, F, ALS, and LS variants. Verify electrical characteristics and voltage levels before substituting with these compatible parts to ensure proper system operation.