PI5C3257Q Equivalent & Substitute Parts

Part Overview

The PI5C3257Q is a 4 x 2:1 Multiplexer/Demultiplexer logic IC manufactured by Diodes Incorporated in a 16-QSOP package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The PI5C3257Q operates on single supply voltage (4.75V to 5.25V) and is rated for industrial temperature range (-40°C to 85°C). Functionally equivalent alternatives are available from multiple manufacturers with improved product status and compliance certifications.

Substiute Parts

PI5C3257Q

Diodes IncorporatedIn Stock: 19418PI5C3257Q Datasheet

Current PartRFQ

PI5C3257QE

Diodes IncorporatedIn Stock: 10203PI5C3257QE Datasheet

DirectRFQ

QS3257QG

Renesas Electronics CorporationIn Stock: 5851QS3257QG Datasheet

DirectRFQ

QS3257QG8

Renesas Electronics CorporationIn Stock: 16780QS3257QG8 Datasheet

DirectRFQ

CBT3257ADS,118

Nexperia USA Inc.In Stock: 1917CBT3257ADS,118 Datasheet

MFR RecommendedRFQ

SN74CBT3257CDBQR

Texas InstrumentsIn Stock: 2499SN74CBT3257CDBQR Datasheet

MFR RecommendedRFQ

SN74CBT3257CDBR

Texas InstrumentsIn Stock: 2127SN74CBT3257CDBR Datasheet

MFR RecommendedRFQ

SN74CBT3257DBQR

Texas InstrumentsIn Stock: 3548SN74CBT3257DBQR Datasheet

MFR RecommendedRFQ

SN74CBT3257DBR

Texas InstrumentsIn Stock: 4574SN74CBT3257DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PI5C3257Q is determined by the following critical parameters:

• Circuit Configuration: 4 x 2:1 multiplexer/demultiplexer topology
• Package Type: 16-SSOP form factor with compatible pin pitch
• Voltage Supply Range: Single supply operation within specified voltage window
• Operating Temperature Range: -40°C to 85°C industrial rating
• Mounting Type: Surface mount compatibility

Substitute parts are grouped into two categories:

Category 1 - Direct Diodes Incorporated Successors: PI5C3257QE maintains identical electrical specifications with active product status and improved RoHS3 compliance.

Category 2 - Cross-Manufacturer Equivalents: QS3257QG and QS3257QG8 (Renesas Electronics), CBT3257ADS,118 (Nexperia), and SN74CBT3257 variants (Texas Instruments) provide functionally equivalent 4 x 2:1 multiplexer/demultiplexer circuits in compatible packages. These parts operate within the same voltage and temperature specifications with active or last-time-buy status.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: PI5C3257QE is the preferred substitute. It is manufactured by the same supplier (Diodes Incorporated), maintains identical electrical specifications and package dimensions, carries active product status, and meets ROHS3 compliance requirements. This part provides direct compatibility with minimal design risk.

Secondary Recommendations: QS3257QG and QS3257QG8 from Renesas Electronics are functionally equivalent alternatives with active status and ROHS3 compliance. Both maintain the original voltage and temperature specifications with identical circuit configuration.

Alternative Options: CBT3257ADS,118 (Nexperia) and SN74CBT3257CDBQR (Texas Instruments) provide equivalent functionality with active product status and ROHS3 compliance. These parts operate within a slightly wider voltage range (4.5V to 5.5V) and maintain full compatibility with the PI5C3257Q circuit topology.

Avoid: SN74CBT3257DBQR and SN74CBT3257DBR carry last-time-buy status, indicating limited future availability. These should be selected only when other alternatives are unavailable.

Frequently Asked Questions (FAQ)

Q: Can PI5C3257QE directly replace PI5C3257Q without design changes?

A: Yes. PI5C3257QE is electrically and mechanically identical to PI5C3257Q. Both operate at 4.75V to 5.25V, support the same -40°C to 85°C temperature range, and use the 16-SSOP package with 0.154" width. Pin configuration and functional behavior are equivalent.

Q: What is the difference between QS3257QG and QS3257QG8?

A: Both parts are manufactured by Renesas Electronics with identical electrical specifications and circuit configuration. The primary difference is packaging designation. Both are functionally equivalent to PI5C3257Q and operate within the same voltage and temperature parameters.

Q: Why do some substitutes specify 4.5V to 5.5V instead of 4.75V to 5.25V?

A: The Texas Instruments SN74CBT3257 series and Nexperia CBT3257ADS,118 operate within a wider voltage tolerance window (4.5V to 5.5V). This wider range encompasses the PI5C3257Q specification (4.75V to 5.25V), ensuring full compatibility. The wider tolerance provides additional design margin.

Q: Are there package dimension differences between substitutes?

A: Most substitutes use 16-SSOP with 0.154" width, matching PI5C3257Q. However, SN74CBT3257CDBR and SN74CBT3257DBR specify 16-SSOP with 0.209" width. Verify PCB footprint compatibility before selection if using these variants.

Q: What does "Last Time Buy" status mean for SN74CBT3257DBQR and SN74CBT3257DBR?

A: Last Time Buy indicates the manufacturer has announced end-of-life for these parts. Current inventory is available, but future production is not planned. These parts should be selected only when preferred alternatives are unavailable, as long-term procurement may become difficult.

Q: Are all substitutes RoHS3 compliant?

A: All recommended substitutes carry ROHS3 compliance certification. The original PI5C3257Q is RoHS non-compliant. If RoHS compliance is required for your application, select from the substitute list.