74HCT373D,653

Latches Overview

The Nexperia 74HCT373D,653 is an octal D-type transparent latch with 3-state outputs housed in a 20-lead SO plastic small outline package (SOT163-1). It operates within a supply voltage range of 4.5 V to 5.5 V and supports ambient temperatures from -40 °C to +125 °C. The device features TTL-level inputs, common output enable control, and clamp diodes on inputs for interfacing voltages exceeding VCC.

Latches Feature Summary

• Octal D-type transparent latch architecture with 3-state non-inverting outputs
• TTL-compatible input levels for direct interface with standard logic systems
• Common 3-state output enable input for bus-oriented applications
• Input clamp diodes allow interfacing to voltages exceeding VCC using current limiting resistors

Latches Applications

• Bus-oriented data storage and transfer systems
• Register applications requiring transparent or latched modes
• Interface circuits connecting TTL logic to CMOS systems

Latches Procurement Notes

Verify the specific ordering suffix

Latches Selection Notes

Select this component when TTL-level input compatibility is required alongside 3-state bus capabilities. Ensure the application environment remains within the specified -40 °C to +125 °C temperature range. Confirm that the 20-lead SOIC package dimensions fit the target PCB layout constraints.

Latches Part Context

This part belongs to the 74HCT series, designed for high-speed CMOS operation with TTL-compatible inputs. It serves as a digital storage element within larger logic systems, providing data retention through latch enable control while maintaining low power dissipation characteristics typical of CMOS technology.

Latches Replacement Considerations

CD74HCT373M

Latches FAQ

How does the OE input affect latch state?

A HIGH level on the OE input causes outputs to assume a high-impedance OFF-state. This operation does not affect the internal state of the latches.

What is the function of the LE input?

When LE is HIGH, the latches are transparent and data enters immediately. When LE transitions from HIGH to LOW, the latches store the information present at the inputs at that moment.