PI3B3257WEX Equivalent & Substitute Parts

Part Overview

The PI3B3257WEX is a 4 x 2:1 Multiplexer/Demultiplexer logic IC manufactured by Diodes Incorporated in 16-SOIC surface mount packaging. This component operates from a single 3V to 3.6V supply and functions across the industrial temperature range of -40°C to 125°C. The part is currently in active product status with substantial inventory availability (18,634 pcs). Equivalent substitute parts are necessary when primary sourcing is unavailable, when alternative packaging formats are required, or when product lifecycle transitions necessitate component replacement.

Substiute Parts

PI3B3257WEX

Diodes IncorporatedIn Stock: 18680PI3B3257WEX Datasheet

Current PartRFQ

SN74CBTLV3257D

Texas InstrumentsIn Stock: 3414SN74CBTLV3257D Datasheet

MFR RecommendedRFQ

SN74CBTLV3257DR

Texas InstrumentsIn Stock: 2813SN74CBTLV3257DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI3B3257WEX is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Package / Case: 16-SOIC (0.154", 3.90mm Width) — physical and electrical interface compatibility
• Mounting Type: Surface Mount — PCB assembly process compatibility
• Category: Logic — functional classification
• Type: Multiplexer/Demultiplexer — core functionality
• Voltage Supply Source: Single Supply — power architecture compatibility
• RoHS Status: ROHS3 Compliant — regulatory compliance requirement

Allowable Parameter Variations:

• Voltage Supply Range: Substitute must support the 3V ~ 3.6V operating range of the main part
• Operating Temperature: Substitute must support at minimum -40°C to 85°C; the main part's extended range to 125°C is not required for substitution
• Circuit Configuration: 4 x 2:1 or 4 x 1:2 configurations are functionally equivalent in multiplexer/demultiplexer applications
• Packaging Format: Tape & Reel (TR), Tube, or Cut Tape (CT) & Digi-Reel® are all acceptable for procurement purposes
• Product Status: Active or Last Time Buy status are both acceptable; End of Life parts are not suitable

Parameter Comparison

Engineering Selection Recommendations

SN74CBTLV3257DR is the primary substitute for the PI3B3257WEX. This part maintains Active product status, ensuring long-term availability and supply chain stability. The 16-SOIC package, surface mount configuration, and ROHS3 compliance are identical to the main part. The voltage supply range of 2.3V ~ 3.6V encompasses the required 3V ~ 3.6V operating window. The operating temperature range of -40°C ~ 85°C covers the lower portion of the main part's range; applications requiring operation above 85°C must remain on the PI3B3257WEX. The Cut Tape & Digi-Reel® packaging format is suitable for both prototype and production assembly processes.

SN74CBTLV3257D is an alternative substitute with identical electrical and package specifications to SN74CBTLV3257DR. However, this part carries Last Time Buy status, indicating discontinued production. Selection of this part should be limited to applications where long-term supply is not critical or where existing inventory reserves are sufficient for the product lifecycle.

Both Texas Instruments substitutes are functionally compatible with the Diodes Incorporated main part across all mandatory compatibility parameters. Selection between substitutes should prioritize SN74CBTLV3257DR due to its Active product status.

Frequently Asked Questions (FAQ)

Q: Can SN74CBTLV3257D and SN74CBTLV3257DR be used interchangeably with PI3B3257WEX?

A: Yes, both Texas Instruments parts are electrically and mechanically compatible substitutes. They share identical 16-SOIC packaging, surface mount configuration, voltage supply compatibility within the 3V ~ 3.6V range, and ROHS3 compliance. The primary difference is product status: SN74CBTLV3257DR is Active, while SN74CBTLV3257D is Last Time Buy.

Q: What is the difference between 4 x 2:1 and 4 x 1:2 circuit configurations?

A: Both configurations represent functionally equivalent multiplexer/demultiplexer topologies with four independent channels. The notation difference reflects manufacturer documentation conventions but does not affect electrical compatibility or pin functionality in this product category.

Q: Are there temperature range limitations when substituting?

A: The PI3B3257WEX operates to 125°C, while both substitute parts operate to 85°C maximum. For applications requiring operation above 85°C, the PI3B3257WEX must be retained. For applications within -40°C to 85°C, the substitutes are fully compatible.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR), Tube, and Cut Tape (CT) & Digi-Reel® are procurement packaging formats only. They do not affect electrical characteristics, performance, or reliability. Selection should be based on assembly process requirements and inventory management practices.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The main part PI3B3257WEX and both substitute parts SN74CBTLV3257D and SN74CBTLV3257DR are ROHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.

Q: What should be considered when selecting between Active and Last Time Buy products?

A: Active products ensure continued manufacturing and long-term supply availability. Last Time Buy products have discontinued production; existing inventory is final. For new designs or products with extended lifecycles, Active status parts are preferred. Last Time Buy parts are acceptable only when supply reserves are adequate for the application's production volume and timeline.