TC74LCX244FTELM

Overview

The TC74LCX244FTELM is a low-voltage octal bus buffer manufactured by Toshiba Semiconductor and Storage. It features two non-inverting buffers with active-low output enables, providing high-speed operation while maintaining CMOS low power dissipation. The device supports a supply voltage range of 1.65 V to 3.6 V and offers 5-V tolerant inputs and outputs. It provides an output current of ±24 mA (min) at 3.0 V and achieves a maximum propagation delay of 6.5 ns at 3.3 V. The component includes power-down protection on all inputs and outputs and is housed in a 20-TSSOP package.

Feature Summary

• Provides 5-V tolerant inputs and outputs for interfacing between 3.3-V systems and 5-V environments
• Includes power-down protection circuits on all inputs and outputs
• Features pin and function compatibility with standard 74 series logic devices

Applications

• 3-state memory address drivers
• High-speed data bus buffering
• Interface between 3.3-V and 5-V logic domains

Procurement Notes

Verify the specific ordering suffix 'ELM' against the official Toshiba datasheet to confirm the exact package type and tape-and-reel specifications. Ensure that the selected variant matches the required operating temperature range and packaging format for your assembly process. Cross-reference the manufacturer part number with authorized distributors to confirm current availability and compliance status.

Selection Notes

Select this component when designing systems requiring bidirectional or unidirectional data transfer between different voltage domains. The 5-V tolerance feature allows direct connection to legacy 5-V peripherals without level shifting. Consider the propagation delay and drive strength requirements to ensure signal integrity across the bus. Verify that the input capacitance and leakage currents meet the system's power and speed constraints.

Part Context

This component belongs to the 74LCX family of low-voltage CMOS logic devices. It is designed for applications demanding high performance and low power consumption. The device is compatible with various 74 series standards, facilitating easy integration into existing designs. It is suitable for portable and battery-operated equipment due to its wide supply voltage range.

Replacement Considerations

Direct substitutes include other 74LCX244 variants from Toshiba or equivalent octal bus buffers from other manufacturers that offer 5-V tolerance and similar electrical characteristics. Ensure that any replacement maintains the same package dimensions and pinout configuration to fit the existing PCB layout.