SN74ALS843DWR

Overview

The SN74ALS843DWR is a nine-bit bus interface D-type latch manufactured by Texas Instruments within the ALS logic series. It features non-inverting outputs and operates on a single supply voltage ranging from 4.5 V to 5.5 V. The device provides a propagation delay of 18 ns, with a low-level output current capability of 32 mA and a high-level output current of -2.6 mA. It functions within an operating temperature range of 0°C to +70°C and is housed in a SOIC-24 surface-mount package.

Feature Summary

• Integrates nine independent D-type latches for parallel data storage
• Provides bus interface functionality with non-inverting outputs
• Delivers high drive strength via 32 mA low-level output current

Applications

• Parallel data buffering in digital systems
• Bus interface applications requiring temporary data storage
• High-speed logic circuits utilizing ALS technology

Procurement Notes

Verify the specific suffix 'DWR' against official documentation to confirm tape-and-reel packaging and industrial-grade temperature ratings. Confirm RoHS compliance status through the manufacturer's latest datasheet or environmental files. Ensure the component matches the exact ALS series specifications rather than generic variants.

Selection Notes

Select this component when designing systems requiring nine-bit latching with moderate speed and high drive capability. The ALS series offers a balance between power consumption and performance suitable for standard 5V logic environments. Verify that the SOIC-24 package footprint aligns with the target PCB layout constraints.

Part Context

This part belongs to the SN74ALS843 family of bus interface latches. It serves as a semiconductor solution for managing parallel data paths in electronic devices. The ALS designation indicates Advanced Low-power Schottky technology, which defines its electrical characteristics and switching speeds relative to other logic families.

Replacement Considerations

The SN74ALS843DW is a verified tube-packaged substitute offering identical electrical performance. Check for availability of the SN74ABT843DW if faster switching speeds are required, noting the change to ABT technology.