74FST3861DWR2

Overview

The onsemi 74FST3861DWR2 is a 10-bit high-performance bus switch manufactured by Semiconductor Components Industries, LLC. It operates within a supply voltage range of 4.0 to 5.5 Volts and maintains CMOS TTL compatibility. The device features extremely low on-resistance (RON) and negligible propagation delay, ensuring signal integrity without introducing noise or ground bounce. Designed for surface-mount applications, the DWR2 suffix indicates it is packaged in a 24-lead SOIC format and supplied in tape-and-reel quantities.

Feature Summary

• Provides bidirectional switching for ten independent data lines with minimal insertion loss
• Features control inputs that are fully compatible with standard TTL and CMOS logic levels
• Ensures signal integrity by eliminating circuit bounce and maintaining near-zero standby current consumption

Applications

• High-speed parallel data bus routing in computing systems
• Signal multiplexing and demultiplexing in industrial control interfaces
• Level shifting and isolation between different logic domains in embedded hardware

Procurement Notes

Verify the specific ordering suffix 'DWR2' corresponds to the SOIC-24 package configuration and tape-and-reel shipping method as defined in the official documentation. Confirm that the component meets the required environmental specifications for your assembly process, noting that this specific package variant is distinct from the TSSOP or QSOP options available in the same product family.

Selection Notes

Select this component when designing circuits requiring low-latency switching for wide parallel buses operating at 5V logic levels. Ensure the design accommodates the maximum DC output sink current limits and thermal resistance characteristics associated with the SOIC-24 package. Verify that the application does not exceed the specified input transition rates to maintain optimal AC performance metrics.

Part Context

This device belongs to the 74FST series of bus switches, which are engineered for high-speed digital applications. The 74FST3861 serves as a pin-for-pin compatible alternative to similar devices like the QS3861, FST3861, and CBT3861, allowing for direct substitution in existing designs while offering optimized electrical characteristics for modern high-frequency signaling requirements.

Replacement Considerations

Publicly confirmed pin-compatible substitutes include the QS3861, FST3861, and CBT3861. These alternatives offer identical footprint and functional mapping, facilitating direct replacement in designs where sourcing constraints exist.