PI74FCT2373ATQ

Latches Overview

The PI74FCT2373ATQ is an octal transparent latch manufactured by Diodes Incorporated (formerly Pericom) using advanced CMOS technology. It features 8-bit wide data paths with 3-state outputs and a built-in 25 ohm series resistor on all outputs to reduce noise from reflections. The device operates within an industrial temperature range of –40°C to +85°C and utilizes TTL input and output levels. It is housed in a 20-pin plastic QSOP package.

Latches Feature Summary

• Built-in 25 ohm series resistors on all outputs eliminate the need for external terminating resistors.
• Pin compatible with bipolar FAST Series devices while offering higher speed and lower power consumption.
• Features hysteresis on all inputs and low ground bounce outputs for improved signal integrity.

Latches Applications

• Bus oriented applications
• Memory address latching
• System clock drivers

Latches Procurement Notes

Verify that the ordering suffix 'Q' corresponds specifically to the 20-pin 150 mil wide plastic QSOP package as documented in the datasheet. Confirm the 'A' suffix indicates the specific speed grade variant required for your timing constraints. Ensure the component source matches the manufacturer's specifications for the FCT logic family.

Latches Selection Notes

Select this component when designing bus-oriented systems requiring octal latching with 3-state outputs. The integrated 25 ohm series resistors simplify PCB layout by removing the requirement for external termination components. This part is suitable for applications needing compatibility with bipolar FAST Series pinouts but requiring the benefits of Fast CMOS technology.

Latches Part Context

This component belongs to the PI74FCT series of logic circuits produced using advanced CMOS technology. It is part of a family that includes complementary buffers and drivers, such as the PI74FCT244 and PI74FCT2244. The series is designed to provide industry-leading speed grades while maintaining low static power consumption.

Latches Replacement Considerations

The datasheet confirms pin compatibility with bipolar FAST Series devices. Specific substitute part numbers are not explicitly listed in the provided documentation; verify cross-reference availability through official distributor channels if alternative sourcing is required.

Latches FAQ

What is the function of the built-in series resistor?

The built-in 25 ohm series resistor on all outputs reduces noise resulting from reflections, thereby eliminating the need for an external terminating resistor.

How does the Latch Enable (LE) control the data flow?

When LE is HIGH, the flip-flops appear transparent to the data. When LE is LOW, the data that meets the set-up time is latched.