SN74ALS373ANSR

Overview

The SN74ALS373ANSR 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 supports a maximum propagation delay of 16 ns at 50 pF load capacitance. The device features buffered control inputs and PNP inputs that reduce DC loading on data lines. It provides high-impedance states via the output-enable input, allowing bus driving without interface components.

Feature Summary

• Features eight latches in a single package for parallel access
• Includes 3-state bus-driving true outputs
• Buffered control inputs reduce DC loading

Applications

• Implementing buffer registers
• I/O ports
• Bidirectional bus drivers
• Working registers

Procurement Notes

Verify the specific ordering suffix 'NSR' corresponds to the SOP (NS) package type and tape-and-reel carrier configuration. Confirm RoHS compliance status and lead finish specifications against the latest Package Option Addendum. Ensure the operating temperature range matches the application requirements for the catalog version.

Selection Notes

Select this component when designing systems requiring octal data storage with tri-state capability. The ALS series offers lower power consumption compared to standard TTL while maintaining compatible logic levels. Verify that the 3-state outputs meet the drive requirements for the connected bus loads.

Part Context

This part belongs to the SN54/74(ALS,AS)373(A) family of octal transparent D-type latches. It is a catalog version of the military-grade SN54ALS373A. The device is designed for highly capacitive or low-impedance loads, distinguishing it from standard logic devices through its enhanced output drive capabilities.

Replacement Considerations

SN74ALS373ADWR

FAQ

How does the Output Enable (OE) input affect internal 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 LE is high, the Q outputs follow the D inputs. When LE goes low, the outputs are latched at the logic levels present at the D inputs.