SN74AS851BDW

Overview

The SN74AS851BDW is a high-speed AS-series logic component manufactured by Texas Instruments. It functions as a 16-line to 1-line data selector or multiplexer with TTL-compatible inputs and three-state outputs. The device is housed in a PDSO28 package, suitable for surface-mount applications. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from 0°C to +70°C. This integrated circuit is designed for efficient data routing in digital systems requiring fast switching speeds.

Feature Summary

• Provides 16-to-1 data selection capability using TTL-compatible inputs
• Features three-state outputs for effective bus line driving
• Utilizes high-speed AS logic technology for rapid signal processing

Applications

• Data routing in digital communication systems
• Address decoding in microprocessor-based designs
• Signal selection in test and measurement equipment

Procurement Notes

Verify the exact package designation against official documentation, as distributor listings may vary between PDSO28 and SOIC-28 descriptions. Confirm the manufacturer source directly with Texas Instruments or authorized distributors to ensure authenticity. Check for end-of-life status or obsolescence notices before finalizing procurement plans. Ensure compatibility with existing board layouts regarding pin configurations and thermal requirements.

Selection Notes

Select this component when a system requires selecting one signal out of sixteen available inputs with minimal propagation delay. The three-state output feature allows for direct connection to shared data buses without external buffering. Verify that the input voltage levels align with standard TTL logic thresholds. Consider the PDSO28 package dimensions for adequate PCB space allocation and thermal management during operation.

Part Context

This part belongs to the Texas Instruments SN74AS series, which represents advanced Schottky logic family components known for improved speed over standard TTL. The SN74AS851B variant specifically addresses multiplexing needs in high-performance digital circuits. It serves as a critical interface element for managing multiple data sources in complex electronic architectures.

Replacement Considerations

Check for SN74AS851N (PDIP) if through-hole mounting is required instead of surface mount. Verify functional equivalence with other 16-to-1 multiplexers from different manufacturers if sourcing constraints exist. Ensure pinout compatibility before substituting with alternative logic families.