PI5C3861QEX Equivalent & Substitute Parts

Part Overview

The PI5C3861QEX is a bus switch logic IC manufactured by Diodes Incorporated, configured as a 10 x 1:1 multiplexer in a 24-QSOP package. This component operates on single supply voltage (4.75V to 5.25V) and supports operating temperatures from -40°C to 85°C. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain flexibility for new production runs or design revisions.

Substiute Parts

PI5C3861QEX

Diodes IncorporatedIn Stock: 2192PI5C3861QEX Datasheet

Current PartRFQ

QS3861PAG

Renesas Electronics CorporationIn Stock: 2581QS3861PAG Datasheet

MFR RecommendedRFQ

QS3861PAG8

Renesas Electronics CorporationIn Stock: 1349QS3861PAG8 Datasheet

MFR RecommendedRFQ

QS3861QG

Renesas Electronics CorporationIn Stock: 7306QS3861QG Datasheet

MFR RecommendedRFQ

SN74CBT3861DBQR

Texas InstrumentsIn Stock: 4124SN74CBT3861DBQR Datasheet

MFR RecommendedRFQ

SN74CBT3861PWR

Texas InstrumentsIn Stock: 5433SN74CBT3861PWR Datasheet

MFR RecommendedRFQ

QS3861QG8

Renesas Electronics CorporationIn Stock: 2362QS3861QG8 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI5C3861QEX is determined by the following critical parameters:

• Circuit Configuration: All substitutes must maintain 10 x 1:1 bus switch topology
• Voltage Supply Range: Operating voltage must be compatible with 4.75V to 5.25V specification
• Operating Temperature Range: Must support -40°C to 85°C minimum
• Package Compatibility: Physical package dimensions and pin assignments must match or be pin-compatible
• Compliance Standards: RoHS3 compliance and REACH unaffected status required

Substitute parts are grouped into two categories:

MFR Recommended Substitutes (QS3861PAG, QS3861PAG8, QS3861QG, SN74CBT3861DBQR, SN74CBT3861PWR): These parts meet all electrical and mechanical parameters with confirmed cross-reference documentation from manufacturers.

Parametric Equivalent (QS3861QG8): This part matches all critical electrical parameters and package specifications but may have different packaging format.

Parameter Comparison

Engineering Selection Recommendations

For Direct Package Replacement (24-SSOP, 0.154" Width):

QS3861QG and QS3861QG8 from Renesas Electronics Corporation provide identical package dimensions and electrical specifications. Both parts are in Active product status, ensuring long-term availability. QS3861QG is available in Tube packaging with 7,257 units in stock, while QS3861QG8 has 2,305 units available. Both maintain ROHS3 compliance and MSL 1 rating.

SN74CBT3861DBQR from Texas Instruments matches the 24-SSOP package footprint and operates within compatible voltage ranges (4.5V to 5.5V). This part is in Last Time Buy status. MSL rating is 2 (1 Year), requiring controlled storage conditions.

For TSSOP Package Variants (24-TSSOP, 0.173" Width):

QS3861PAG and QS3861PAG8 from Renesas Electronics Corporation provide equivalent electrical performance in the 24-TSSOP package. QS3861PAG is available in Tube packaging with 2,538 units in stock. QS3861PAG8 has 1,251 units available. Both are in Active product status with MSL 1 rating and ROHS3 compliance.

SN74CBT3861PWR from Texas Instruments is available in Cut Tape and Digi-Reel packaging with 5,367 units in stock. This part is in Active product status with MSL 1 rating, providing extended availability compared to Last Time Buy alternatives.

Compliance and Regulatory Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original PI5C3861QEX specifications. Parts in Active product status (Renesas QS3861 series and SN74CBT3861PWR) are recommended for new designs requiring long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can QS3861PAG be used as a direct replacement for PI5C3861QEX?

A: QS3861PAG is electrically equivalent and meets all functional specifications. However, the package differs: QS3861PAG uses 24-TSSOP (0.173" width) while PI5C3861QEX uses 24-SSOP (0.154" width). PCB layout modifications are required for package substitution.

Q: What is the difference between QS3861QG and QS3861QG8?

A: Both parts are parametrically equivalent with identical electrical specifications and 24-SSOP package dimensions. The primary difference is packaging format. QS3861QG is supplied in Tube, while QS3861QG8 packaging format is not specified. Both are suitable for direct footprint replacement.

Q: Why does SN74CBT3861DBQR have a wider voltage supply range (4.5V to 5.5V)?

A: Texas Instruments 74CBT series components are designed with broader voltage tolerance specifications. The PI5C3861QEX operates within the 4.75V to 5.25V subset of this range, making SN74CBT3861DBQR compatible with designs using the original part's voltage specifications.

Q: Is MSL rating important when selecting a substitute?

A: Yes. PI5C3861QEX has MSL 1 (Unlimited), meaning no moisture sensitivity restrictions. SN74CBT3861DBQR has MSL 2 (1 Year), requiring controlled storage and handling. For high-volume production or extended storage, MSL 1 rated parts (Renesas QS3861 series and SN74CBT3861PWR) are preferred.

Q: Can I use a TSSOP package part in a design laid out for SSOP?

A: No. While both are 24-pin surface mount packages, TSSOP (0.173" width) and SSOP (0.154" width) have different footprints. PCB redesign is required for package migration. Use QS3861QG or QS3861QG8 for direct SSOP footprint compatibility.

Q: Which substitute offers the best long-term availability?

A: SN74CBT3861PWR and all Renesas QS3861 variants are in Active product status, ensuring continued manufacturing and supply. PI5C3861QEX and SN74CBT3861DBQR are both Last Time Buy, indicating limited future availability.