PI74LPT373AQ

Latches Overview

The PI74LPT373AQ is an 8-bit transparent latch manufactured by Diodes Incorporated, utilizing advanced 0.6 micron CMOS technology within the LPT series. It features balanced output drive capabilities of 24 mA for both sink and source currents. The device operates with a supply voltage range of 2.7V to 3.6V and supports industrial temperatures from -40°C to +85°C. Propagation delays vary by grade: the 'A' suffix indicates a maximum delay of 5.2 ns at CL=50 pF, while the 'C' suffix achieves 4.2 ns. It includes input hysteresis and is designed for bus-oriented applications.

Latches Feature Summary

• Supports mixed-signal mode operation allowing inputs to be driven by 3V or 5V signals while outputs interface with 3V or 5V buses.
• Features 3-state outputs controlled by an active-low Output Enable (OE) pin to manage bus impedance states.
• Incorporates hysteresis on all inputs to improve noise immunity during signal transitions.
• Provides low ground bounce outputs and excellent drive capability suitable for high-speed digital systems.

Latches Applications

• Bus-oriented data storage in mixed 3.3V/5.0V logic systems
• Registering data lines where setup time requirements are critical
• Interface translation between different voltage domains

Latches Procurement Notes

Verify the specific speed grade suffix (e.g., AQ vs AC) against the required propagation delay specifications before procurement. Confirm that the package type matches the design footprint, as options include TSSOP, QSOP, TQSOP, and SOIC. Ensure the ordering part number aligns with the manufacturer's current naming conventions, as legacy Pericom identifiers may require cross-referencing with Diodes Incorporated catalogs.

Latches Selection Notes

Select this component when designing circuits requiring 8-bit latching with 3-state buffering in environments with mixed voltage levels. The LPT series offers superior speed compared to standard CMOS families. Consider the 'A' or 'C' suffix based on whether the system timing budget requires the 5.2 ns or 4.2 ns propagation delay limits respectively. Verify thermal management needs for the chosen package style under maximum load conditions.

Latches Part Context

This device belongs to the PI74LPT series produced originally by Pericom Semiconductor Corporation, now part of Diodes Incorporated. The LPT family is characterized by advanced 0.6 micron CMOS processes designed to deliver industry-leading speed grades while maintaining low power consumption. These components are engineered to bridge compatibility gaps between older logic families and modern low-voltage standards.

Latches Replacement Considerations

The datasheet notes compatibility with LCX and LVT families. Designers should verify pinout and electrical characteristics carefully when substituting with generic 74LVC or 74LVT equivalents, as drive strengths and voltage tolerances may differ.

Latches FAQ

How does the device handle mixed voltage inputs?

The PI74LPT373 supports 5V tolerant mixed signal mode, allowing inputs to accept 3V or 5V logic levels while the outputs can drive 3V loads or connect to 5V buses.

What determines the propagation delay performance?

Performance depends on the specific suffix; the 'A' grade has a max propagation delay of 5.2 ns, while the 'C' grade achieves 4.2 ns under a 50 pF load condition.