SN74HCT373DBR

Latches Overview

The SN74HCT373DBR is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features high-current true outputs capable of driving up to 15 LSTTL loads. The device provides ±6-mA output drive at 5 V and maintains low input current of 1 μA maximum, ensuring TTL-voltage compatibility. Typical propagation delay is 21 ns, with a maximum static power consumption of 80 μA. It is housed in a 20-pin SOIC package.

Latches Feature Summary

• Transparent D-type latching mechanism where outputs follow inputs while the latch-enable signal is active
• Three-state outputs designed for driving highly capacitive or low-impedance loads without interface components
• TTL-voltage compatible inputs with low input current requirements
• High-current outputs capable of driving multiple LSTTL loads

Latches Applications

• Buffer registers
• I/O ports
• Bidirectional bus drivers
• Working registers

Latches Procurement Notes

Verify the specific ordering suffix 'DBR' against the manufacturer's latest Package Option Addendum to confirm the exact tape-and-reel specifications and moisture sensitivity level. Ensure the procurement channel sources from authorized distributors to guarantee RoHS compliance and authentic component quality. Cross-reference the datasheet revision history for any updates regarding thermal resistance values or pin configurations before finalizing the bill of materials.

Latches Selection Notes

Select this component when designing systems requiring octal data storage with tri-state bus interfacing capabilities under standard 5 V logic conditions. The HCT series ensures compatibility with TTL logic families while offering CMOS power efficiency. Consider the 20-pin SOIC footprint for surface-mount assembly constraints. Evaluate the propagation delay characteristics against system timing requirements to ensure adequate setup and hold times are met during operation.

Latches Part Context

This part belongs to the SNx4HCT373 family of octal transparent D-type latches with 3-state outputs. The family includes variants such as SN74HCT373DW and SN74HCT373N, differing primarily in packaging styles like SOIC, PDIP, and TSSOP. All variants share identical electrical characteristics and functional behavior, allowing for flexibility in board layout and manufacturing processes while maintaining consistent performance metrics across the product line.

Latches Replacement Considerations

SN74HCT373DWR

Latches FAQ

How does the output-enable (OE) input affect internal latch operations?

The OE input places the outputs in a high-impedance state but does not affect the internal operations of the latches. Data can be retained or entered while the outputs are disabled.

What is the function of the latch-enable (LE) input?

When the LE input is high, the Q outputs follow the D inputs. When LE is taken low, the Q outputs are latched at the levels set up at the D inputs.