PI3B3251Q Equivalent & Substitute Parts

Part Overview

The PI3B3251Q is a Multiplexer/Demultiplexer logic IC with 1 x 8:1 circuit configuration in a 16-QSOP package. Manufactured by Diodes Incorporated, this component is classified as obsolete product status. Due to its obsolete designation and limited availability in active production channels, identifying equivalent substitute parts is essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

PI3B3251Q

Diodes IncorporatedIn Stock: 2496PI3B3251Q Datasheet

Current PartRFQ

PI3B3251QE

Diodes IncorporatedIn Stock: 3836PI3B3251QE Datasheet

DirectRFQ

74CBTLV3251QG

IDT, Integrated Device Technology IncIn Stock: 463374CBTLV3251QG Datasheet

MFR RecommendedRFQ

SN74CB3Q3251DBQR

Texas InstrumentsIn Stock: 3943SN74CB3Q3251DBQR Datasheet

MFR RecommendedRFQ

SN74CBTLV3251DBQR

Texas InstrumentsIn Stock: 3261SN74CBTLV3251DBQR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI3B3251Q is determined by the following critical parameters:

• Circuit Configuration: 1 x 8:1 multiplexer/demultiplexer topology
• Package Type: 16-SSOP (0.154", 3.90mm Width) surface mount
• Operating Temperature Range: -40°C ~ 85°C
• Voltage Supply Range: Minimum 3V compatibility required

All substitute parts listed maintain identical circuit configuration and package footprint compatibility. Voltage supply ranges may extend beyond the original specification, providing broader operational flexibility. All substitutes are active product status with current manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PI3B3251QE

PI3B3251QE is the direct equivalent from Diodes Incorporated, maintaining identical electrical specifications and package configuration as the obsolete PI3B3251Q. This part carries active product status with ROHS3 compliance and unlimited moisture sensitivity rating, making it the preferred choice for direct replacement in existing designs.

Secondary Substitutes: 74CBTLV3251QG, SN74CB3Q3251DBQR, SN74CBTLV3251DBQR

These alternatives from IDT and Texas Instruments provide functional equivalence with extended voltage supply range (2.3V ~ 3.6V) and active product status. All three parts maintain identical circuit configuration, package footprint, and operating temperature specifications. SN74CBTLV3251DBQR and SN74CB3Q3251DBQR carry MSL-2 ratings requiring controlled storage conditions. All substitutes are ROHS3 compliant and REACH unaffected.

Selection among secondary substitutes should be based on supply chain availability, packaging format preference (bulk vs. cut tape), and moisture sensitivity requirements for your manufacturing environment.

Frequently Asked Questions (FAQ)

Q: Can PI3B3251QE directly replace PI3B3251Q without design modifications?

A: Yes. PI3B3251QE maintains identical electrical specifications, circuit configuration, and 16-SSOP package footprint. No PCB layout or schematic changes are required.

Q: What is the key difference between PI3B3251Q and the Texas Instruments alternatives?

A: The primary difference is voltage supply range. PI3B3251Q operates at 3V ~ 3.6V, while SN74CBTLV3251DBQR and SN74CB3Q3251DBQR extend the lower limit to 2.3V. All maintain identical 1 x 8:1 circuit topology and 16-SSOP package.

Q: Are all substitute parts RoHS compliant?

A: PI3B3251Q is RoHS non-compliant. All listed substitutes (PI3B3251QE, 74CBTLV3251QG, SN74CB3Q3251DBQR, SN74CBTLV3251DBQR) are ROHS3 compliant.

Q: What does MSL-2 (1 Year) mean for SN74CBTLV3251DBQR and SN74CB3Q3251DBQR?

A: MSL-2 indicates Moisture Sensitivity Level 2, requiring storage in controlled humidity conditions with a 1-year shelf life from manufacturing date. PI3B3251QE carries MSL-1 (Unlimited), allowing indefinite storage without moisture control.

Q: Can I use 74CBTLV3251QG in applications requiring 3V operation?

A: Yes. 74CBTLV3251QG operates across 2.3V ~ 3.6V range, fully encompassing the 3V ~ 3.6V requirement of the original PI3B3251Q.

Q: Are there packaging format differences among substitutes?

A: Yes. PI3B3251QE is supplied in Tube packaging, 74CBTLV3251QG in Bulk, and both Texas Instruments parts in Cut Tape (CT) & Digi-Reel format. All maintain identical component specifications; packaging format affects handling and storage only.