SN74CBT3257PWR

Overview

The SN74CBT3257PWR is a 4-bit 1-of-2 high-speed FET multiplexer/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 4 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. The device features TTL-compatible input levels and utilizes a 16-pin TSSOP package. Key electrical characteristics include a typical on-state resistance (ron) of 14 Ω at VCC = 4 V and 10 Ω at VCC = 4.5 V, with maximum values of 20 Ω and 15 Ω respectively. Propagation delay (tpd) ranges from 0.25 ns to 0.35 ns depending on the supply voltage.

Feature Summary

• Provides four independent bidirectional data paths for signal routing between A and B ports.
• Features low on-state resistance to minimize propagation delay during switching operations.
• Includes output-enable (OE) and select-control (S) inputs for precise channel selection and disconnection control.

Applications

• High-speed data bus switching applications
• Signal routing in digital communication systems
• Multiplexing and demultiplexing of parallel data lines

Procurement Notes

Verify that the ordering suffix 'PWR' corresponds to the tape-and-reel packaging format as specified in the manufacturer's documentation. Confirm the component status is active or production-ready before finalizing procurement plans. Ensure compatibility with the required 16-pin TSSOP footprint and check for any specific moisture sensitivity level requirements relevant to your assembly process.

Selection Notes

Select this component when a 4-channel multiplexer with TTL-compatible logic levels is required. It is suitable for designs operating strictly within the 4 V to 5.5 V supply voltage range. Consider the TSSOP-16 package dimensions if space constraints are present. Verify that the load capacitance requirements align with the specified switching characteristics for optimal performance.

Part Context

This part belongs to the SN74CBT3257 family of high-speed FET multiplexers. It is functionally equivalent to other variants such as SN74CBT3257PW (tube packaging) and SN74CBT3257D (SOIC packaging). The primary distinction lies in the physical package type and shipping configuration, while the internal logic and electrical specifications remain consistent across these variations.

Replacement Considerations

Direct substitutes include SN74CBT3257PW for tube-packaged equivalents. Other pin-compatible options within the same family may be considered if packaging differences are acceptable. Ensure that any replacement maintains the 4 V to 5.5 V operating voltage range and TTL input compatibility.