SN74AS373DWR

Overview

The SN74AS373DWR is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It belongs to the 74AS logic series and operates within a supply voltage range of 4.5 V to 5.5 V. The device features a propagation delay of 6 ns, a low-level output current of 48 mA, and a high-level output current of -15 mA. It is housed in a 20-SOIC package and supports an operating temperature range from 0°C to +70°C.

Feature Summary

• Features three-state bus-driving true outputs designed for driving highly capacitive or relatively low-impedance loads.
• Provides full parallel access for loading data into the eight latches simultaneously.
• Utilizes buffered control inputs and pnp input structures to reduce dc loading on data lines.

Applications

• Implementing buffer registers
• Configuring I/O ports
• Serving as bidirectional bus drivers
• Functioning as working registers

Procurement Notes

Verify that the component matches the SN74AS373DWR designation and SOIC-20 packaging. Confirm the manufacturer is Texas Instruments and check for RoHS compliance status. Ensure the part meets the specified commercial temperature range requirements before integration.

Selection Notes

Select this component when high-speed performance and strong drive capability are required for bus applications. The AS series offers faster switching speeds compared to standard TTL variants. Verify compatibility with system voltage levels and ensure adequate thermal management for the SOIC package.

Part Context

This device is part of the SN54ALS373A, SN54AS373, SN74ALS373A, and SN74AS373 family of octal transparent D-type latches. It shares functional similarities with other members of this group but is distinguished by its specific AS logic characteristics and speed ratings.

Replacement Considerations

SN74ALS373ADWR

FAQ

How does the output-enable input affect internal operations?

The buffered output-enable input places the outputs in a high-impedance state without affecting the internal operations of the latches, allowing data retention or entry while outputs are off.

What is the function of the latch-enable input?

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