TC74LCX125FK(EL,K)

Overview

The TC74LCX125FK is a low-voltage quad bus buffer manufactured by Toshiba Semiconductor and Storage. It operates within a supply voltage range of 1.65 V to 3.6 V, with inputs and outputs tolerant up to 5.5 V. The device features four non-inverting buffers with three-state outputs controlled by an OE input. Key electrical parameters include a maximum propagation delay of 6.0 ns at 3.3 V, minimum output currents of ±24 mA, and power-down protection on all pins. It is available in SOP-14 and VSSOP-14 packages.

Feature Summary

• Provides high-speed operation while maintaining CMOS low power dissipation for use in 3.3-V systems.
• Features five-volt tolerant inputs and outputs, allowing safe interfacing between 3.3-V and 5-V environments.
• Includes power-down protection on all inputs and outputs to prevent excessive current draw during power-off states.

Applications

• High-speed data bus buffering in 3.3-V logic systems
• Voltage level translation between 3.3-V and 5-V components
• Interface circuits requiring three-state control for bus isolation

Procurement Notes

Verify the specific package suffix (FK indicates VSSOP) against the required footprint. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as datasheet documentation regarding environmental certifications may vary by production batch. Ensure the design accounts for the specified operating temperature range of -40°C to 85°C.

Selection Notes

Select this component when a quad bus buffer with 5-V tolerance is required for low-voltage applications. It serves as a pin-compatible replacement for various 74-series drivers such as 74AC/VHC/HC/F/ALS/LS types. Consider the VSSOP package for space-constrained designs compared to the standard SOP option.

Part Context

This part belongs to the TC74LCX series of low-voltage CMOS digital integrated circuits. The LCX family is designed specifically for low-power, high-speed applications in portable and battery-operated devices. The 125 variant specifically denotes a quad buffer with three-state outputs, distinguishing it from inverters or transceivers within the same logical family.

Replacement Considerations

The datasheet explicitly states pin and function compatibility with the 74AC, 74VHC, 74HC, 74F, 74ALS, and 74LS 125 type devices. These can be considered direct functional substitutes if voltage levels and speed requirements align with the LCX specifications.