PI3B3125WEX Equivalent & Substitute Parts

Part Overview

The PI3B3125WEX is a bus switch IC manufactured by Diodes Incorporated, designed for single supply logic applications. This 1 x 1:1 bus switch with 4 independent circuits operates across a 3V to 3.6V supply range and is housed in a 14-SOIC surface mount package. The part is currently in active product status with 1643 units available in stock. Equivalent and substitute parts become necessary when the primary part reaches end-of-life status, supply constraints occur, or when design flexibility is required across manufacturing sources while maintaining functional compatibility.

Substiute Parts

PI3B3125WEX

Diodes IncorporatedIn Stock: 1729PI3B3125WEX Datasheet

Current PartRFQ

SN74CBTLV3125D

Texas InstrumentsIn Stock: 2273SN74CBTLV3125D Datasheet

MFR RecommendedRFQ

SN74CBTLV3125DR

Texas InstrumentsIn Stock: 2246SN74CBTLV3125DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PI3B3125WEX is determined by strict alignment of the following critical parameters:

• Circuit Configuration: 1 x 1:1 topology with 4 independent circuits
• Package Type: 14-SOIC surface mount package with identical 0.154" (3.90mm) width
• Operating Temperature Range: -40°C to 85°C
• Mounting Type: Surface mount technology
• Compliance Standards: ROHS3 compliance, REACH unaffected status, and EAR99 classification

The substitute parts identified—SN74CBTLV3125D and SN74CBTLV3125DR—meet all these criteria. Both are manufactured by Texas Instruments and share the identical 14-SOIC package footprint, circuit topology, and temperature operating range. The primary distinction between substitutes relates to packaging format (Tube versus Cut Tape & Digi-Reel) and product status, not functional or electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

SN74CBTLV3125DR is the preferred substitute for new designs and ongoing production. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. The extended voltage supply range (2.3V ~ 3.6V) provides additional design flexibility compared to the PI3B3125WEX, while maintaining full compatibility across all critical parameters. The Cut Tape & Digi-Reel packaging format supports both automated assembly and manual component handling.

SN74CBTLV3125D serves as an alternative substitute where Tube packaging is acceptable. This part carries Last Time Buy status, indicating limited future availability. Selection of this part should be reserved for applications where existing inventory management or specific procurement workflows require Tube packaging.

Both Texas Instruments substitutes are ROHS3 compliant, REACH unaffected, and classified as EAR99, matching the regulatory and compliance profile of the original PI3B3125WEX.

Frequently Asked Questions (FAQ)

Q: Can SN74CBTLV3125D and SN74CBTLV3125DR be used interchangeably with PI3B3125WEX?

A: Yes. Both parts share identical circuit topology (1 x 1:1 with 4 independent circuits), package footprint (14-SOIC), operating temperature range (-40°C to 85°C), and compliance certifications. The differences are packaging format and product lifecycle status, not functional characteristics.

Q: What is the impact of the extended voltage supply range in the Texas Instruments substitutes?

A: The SN74CBTLV3125D and SN74CBTLV3125DR operate from 2.3V to 3.6V, compared to the PI3B3125WEX range of 3V to 3.6V. This extended lower voltage limit provides additional design margin and compatibility with lower supply voltage applications, with no negative impact on designs using the original 3V to 3.6V specification.

Q: What is the difference between SN74CBTLV3125D and SN74CBTLV3125DR?

A: The primary difference is packaging format. SN74CBTLV3125D is supplied in Tube packaging, while SN74CBTLV3125DR uses Cut Tape & Digi-Reel format. Functionally and electrically, both parts are identical. SN74CBTLV3125DR is recommended for new designs due to its active product status.

Q: Are there any PCB layout or assembly considerations when substituting these parts?

A: No. All three parts use the identical 14-SOIC package with 0.154" (3.90mm) width. PCB footprints, land patterns, and assembly processes remain unchanged during substitution.

Q: What compliance certifications apply to these substitute parts?

A: Both SN74CBTLV3125D and SN74CBTLV3125DR are ROHS3 compliant, REACH unaffected, and classified as EAR99. These certifications match the PI3B3125WEX profile.