SN74ALS873BDWR

Overview

The SN74ALS873BDWR is a dual D-type transparent latch manufactured by Texas Instruments, belonging to the 74ALS logic family. It features eight independent circuits with tri-state outputs housed in a 24-pin SOIC package. The device operates within a supply voltage range of 4.5V to 5.5V and supports a propagation delay of 14ns. It provides a low-level output current of 32mA and a high-level output current of -2.6mA. The component is rated for commercial operation between 0°C and +70°C.

Feature Summary

• Dual-channel architecture supporting two independent four-bit latches
• Tri-state output capability for bus-driven applications
• Transparent latch functionality allowing direct data passage when enabled

Applications

• Parallel-to-serial conversion interfaces
• Bus holding registers in microprocessor systems
• Data buffering for I/O expansion

Procurement Notes

Verify the specific suffix 'BDWR' to confirm the SOIC-24 surface-mount package and tape-and-reel packaging format. Ensure compatibility with existing PCB footprints designed for 0.3-inch width SOIC packages. Confirm RoHS compliance status as per the latest manufacturer documentation before finalizing procurement.

Selection Notes

Select this component for designs requiring dual 4-bit latching with tri-state control in a compact surface-mount form factor. Compare propagation delays against system timing requirements, noting the 14ns specification. Evaluate power consumption characteristics relative to other 74ALS series devices to ensure thermal management meets design constraints.

Part Context

This part belongs to the Texas Instruments 74ALS873B series of dual D-type transparent latches. It shares functional similarities with the SN74ALS873BN but differs in package type, offering a surface-mount alternative to the through-hole PDIP version. The device is part of the broader 74ALS logic family known for high-speed performance.

Replacement Considerations

The SN74ALS873BDW is listed as a similar replacement option. Verify pinout compatibility and electrical specifications before substitution.