74VHC573FT

Latches Overview

The Toshiba 74VHC573FT is an octal D-type latch with three-state outputs, fabricated using silicon gate C2MOS technology. It operates within a supply voltage range of 2.0 V to 5.5 V and supports an operating temperature range from -40°C to 125°C. The device features balanced propagation delays (tPLH ≈ tPHL) and low power dissipation, achieving high-speed operation comparable to Bipolar Schottky TTL. It includes input protection allowing 0 to 5.5 V application regardless of supply voltage, ensuring compatibility between 5 V and 3 V systems.

Latches Feature Summary

• Octal D-type latch architecture with three-state output capability controlled by separate latch enable and output enable inputs.
• Advanced high-speed CMOS performance utilizing silicon gate C2MOS technology for low power dissipation.
• Integrated input protection circuit enabling safe interfacing between mismatched supply voltages such as 5 V and 3 V systems.
• Power-down protection provided on all inputs to prevent device destruction during voltage mismatches.

Latches Applications

• Interfacing 5 V logic systems with 3 V logic systems
• Battery backup system interfaces requiring voltage level translation
• High-speed data latching in digital circuits

Latches Procurement Notes

Verify the specific ordering suffix matches the required package type, as variations exist within the product line. Confirm compliance with AEC-Q100 reliability requirements if automotive applications are intended, as this may require direct consultation with Toshiba sales representatives. Ensure design adheres to the specified derating factors for power dissipation at temperatures exceeding 85°C to maintain reliability standards.

Latches Selection Notes

Select this component when an octal latch with three-state outputs is required alongside high-speed performance and low power consumption. It is suitable for designs needing robust input protection against voltage mismatches between different logic families. Consider the TSSOP20B package constraints and verify that the operating temperature range meets the environmental requirements of the target application.

Latches Part Context

The 74VHC573FT belongs to the 74VHC series of advanced high-speed CMOS logic integrated circuits manufactured by Toshiba Semiconductor and Storage. This series is designed to provide performance similar to equivalent Bipolar Schottky TTL while maintaining the low power advantages of CMOS technology. The part is pin and function compatible with other 573-type devices in the 74AC/HC/AHC/LV series.

Latches Replacement Considerations

The datasheet states the device is pin and function compatible with 74 series 573 types, including 74AC, 74HC, 74AHC, and 74LV variants. Verify electrical characteristics such as propagation delay and output drive current match the original design requirements before substitution.

Latches FAQ

How does the 74VHC573FT handle input voltages that exceed the supply voltage?

The device includes an input protection circuit that allows 0 to 5.5 V to be applied to the input pins without regard to the supply voltage, preventing device destruction due to mismatched supply and input voltages.

What is the typical propagation delay of the 74VHC573FT at 5.0 V?

The typical propagation delay (tpd) is 4.5 ns at a supply voltage (VCC) of 5.0 V.

Is the 74VHC573FT compliant with automotive reliability standards?

Yes, the device is compliant with the reliability requirements of AEC-Q100 (Rev. H).