PI3C3126Q Bus Switch Equivalent & Substitute Parts

Part Overview

The PI3C3126Q is a bus switch IC manufactured by Diodes Incorporated, configured as a 1 x 1:1 logic switch in a 16-QSOP package. This component functions as a single-pole, single-throw (SPST) electronic switch for routing digital signals in low-voltage applications. The part is currently classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct board-level replacement without design modifications.

Substiute Parts

PI3C3126Q

Diodes IncorporatedIn Stock: 3381PI3C3126Q Datasheet

Current PartRFQ

PI3C3126QE

Diodes IncorporatedIn Stock: 9268PI3C3126QE Datasheet

DirectRFQ

74CBTLV3125QG

IDT, Integrated Device Technology IncIn Stock: 4207974CBTLV3125QG Datasheet

DirectRFQ

SN74CBTLV3126DBQR

Texas InstrumentsIn Stock: 2448SN74CBTLV3126DBQR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI3C3126Q is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Circuit configuration: 1 x 1:1 topology with 4 independent circuits
• Voltage supply range: 2.3V ~ 3.6V single supply operation
• Package type: 16-SSOP (0.154", 3.90mm Width) surface mount
• Functional classification: Bus Switch logic IC

All qualified substitutes maintain these core specifications, ensuring functional and physical compatibility. Substitute parts may differ in product status (active vs. obsolete), RoHS compliance level, packaging format (tube, bulk, tape & reel), and moisture sensitivity rating, provided the electrical and mechanical parameters remain unchanged.

Parameter Comparison

Engineering Selection Recommendations

PI3C3126QE (Diodes Incorporated): This direct successor from the original manufacturer is the primary substitute. It maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. The unlimited moisture sensitivity rating (MSL 1) provides superior storage and handling characteristics compared to alternatives.

SN74CBTLV3126DBQR (Texas Instruments): This manufacturer-recommended alternative is suitable for applications requiring extended operating temperature specifications (-40°C ~ 85°C). It provides ROHS3 compliance and is available in tape & reel packaging for high-volume production. The MSL 2 rating requires controlled storage conditions (1-year shelf life).

74CBTLV3125QG (IDT): This substitute offers the lowest cost profile with the highest inventory availability (42,041 units). It maintains full electrical compatibility and is available in bulk packaging. Operating temperature range (-40°C ~ 85°C) supports extended environmental applications.

Frequently Asked Questions (FAQ)

Q: Can PI3C3126QE be used as a direct replacement for PI3C3126Q? A: Yes. PI3C3126QE is a direct substitute with identical electrical specifications (1 x 1:1 configuration, 2.3V ~ 3.6V supply, 16-SSOP package) and improved product status (active vs. obsolete). No design modifications are required.

Q: What is the difference between the 74CBTLV series substitutes? A: Both 74CBTLV3125QG and SN74CBTLV3126DBQR maintain the same electrical and package specifications as PI3C3126Q. The primary differences are manufacturer (IDT vs. Texas Instruments), packaging format (bulk vs. tape & reel), and moisture sensitivity rating. Selection depends on production volume and storage requirements.

Q: Are all substitutes compatible with the same PCB footprint? A: Yes. All substitute parts use the 16-SSOP (0.154", 3.90mm Width) package, ensuring identical PCB footprint compatibility. No layout modifications are necessary.

Q: Does moisture sensitivity affect component selection? A: Moisture sensitivity levels (MSL 1 vs. MSL 2) impact storage and handling procedures. MSL 1 components (PI3C3126QE, PI3C3126Q) have unlimited shelf life. MSL 2 components (SN74CBTLV3126DBQR) require controlled storage with a 1-year maximum shelf life from manufacturing date.

Q: Which substitute is recommended for new designs? A: PI3C3126QE is the recommended primary choice due to manufacturer continuity, ROHS3 compliance, and superior moisture sensitivity rating. For applications requiring extended temperature specifications, SN74CBTLV3126DBQR is suitable.

Q: Are RoHS certifications important for this application? A: RoHS compliance is determined by end-product requirements and regional regulations. PI3C3126QE and SN74CBTLV3126DBQR both provide ROHS3 compliance for regulated markets. The original PI3C3126Q is non-compliant and unsuitable for new RoHS-regulated applications.