TC74LCX573F(EL,K,F

Overview

The TC74LCX573F(EL,K,F) is a low-voltage octal D-type latch manufactured by Toshiba Semiconductor and Storage. It operates within a supply voltage range of 1.65 V to 3.6 V, featuring 5-V tolerant inputs and outputs for interfacing with 5-V systems. The device provides high-speed operation with a maximum propagation delay of 8.0 ns at 3.0 V to 3.6 V. It includes power-down protection on all inputs and outputs and offers an output current capability of 24 mA (min) at 3.0 V.

Feature Summary

• Low-voltage operation compatible with 3.3-V systems while maintaining CMOS low power dissipation
• High-speed performance achieving propagation delays as low as 8.0 ns under specified conditions
• Robust output drive capability delivering a minimum output current of 24 mA at 3.0 V
• Integrated power-down protection circuits on all inputs and outputs to prevent leakage

Applications

• Data storage in 3.3-V digital logic systems
• Interfacing between 3.3-V and 5-V supply environments
• Octal data latching applications requiring high-speed operation

Procurement Notes

Verify the specific package suffix required for your design, as the base part number covers multiple physical packages including SOP and VSSOP. Confirm that the selected variant meets the necessary operating temperature range of -40°C to 85°C. Ensure input pins are tied to valid logic levels when unused to maintain proper functionality. Check for any manufacturing date code restrictions regarding the 1.8 V electrical characteristics if applicable to your voltage requirements.

Selection Notes

Select this component when designing low-voltage systems requiring octal latching with 5-V tolerance. It serves as a pin-compatible replacement for older 74 series types such as 74AC, VHC, HC, F, ALS, and LS variants. Consider the 8.0 ns propagation delay for timing-critical paths. Evaluate the 24 mA output drive strength against load requirements. Verify package availability matches board space constraints between SOP and VSSOP options.

Part Context

This device belongs to the TC74LCX series of low-voltage CMOS logic integrated circuits from Toshiba. The LCX family is designed for high-speed operation in low-voltage applications, specifically targeting 3.3-V systems. It shares functional compatibility with standard 74-series logic families, facilitating easier upgrades or replacements in existing designs without significant circuit modifications.

Replacement Considerations

Direct substitutes include other 74LCX573 variants from different manufacturers that offer identical pinouts and logical functions. Ensure replacement parts support the same 1.65 V to 3.6 V supply range and 5-V tolerant I/O specifications. Verify that alternative components meet the required 8.0 ns propagation delay and 24 mA output current capabilities.