PI3C3861Q Equivalent & Substitute Parts

Part Overview

The PI3C3861Q is a bus switch logic IC manufactured by Diodes Incorporated, configured as a 10 x 1:1 multiplexer in a 24-QSOP surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. Bus switches of this configuration are used in signal routing and multiplexing applications where low-capacitance switching and minimal propagation delay are required.

Key Parameters

Parameter	Value
Type	Bus Switch
Circuit Configuration	10 x 1:1
Independent Circuits	1
Voltage Supply Source	Single Supply
Voltage - Supply Range	2.3V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	24-SSOP (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PI3C3861Q is determined by strict equivalence across the following parameters:

Circuit configuration: 10 x 1:1 topology
Voltage supply range: 2.3V ~ 3.6V
Operating temperature range: -40°C ~ 85°C
Mounting type: Surface mount
Package footprint: 24-SSOP (0.154", 3.90mm Width)
Independent circuits: 1

Parts meeting all these criteria are classified as parametric equivalents. Packaging format (tube, tape & reel) does not affect electrical compatibility. Product status (active vs. obsolete) and RoHS compliance are secondary considerations for substitution eligibility but are relevant for long-term procurement strategy.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Circuit	Voltage Supply (V)	Operating Temp (°C)	Package	Product Status	RoHS Status	MSL	Inventory (Pcs)
PI3C3861Q	Diodes Incorporated	10 x 1:1	2.3 ~ 3.6	-40 ~ 85	24-QSOP	Obsolete	Non-compliant	1	2100
PI3C3861-AQE	Diodes Incorporated	10 x 1:1	2.3 ~ 3.6	-40 ~ 85	24-QSOP	Obsolete	ROHS3 Compliant	1	1622
SN74CBTLV3861DBQR	Texas Instruments	10 x 1:1	2.3 ~ 3.6	-40 ~ 85	24-SSOP	Active	ROHS3 Compliant	2	5406
74CBTLV3861QG	Renesas Electronics Corporation	10 x 1:1	2.3 ~ 3.6	-40 ~ 85	24-QSOP	Active	ROHS3 Compliant	1	3700
QS3VH384QG	Renesas Electronics Corporation	10 x 1:1	2.3 ~ 3.6	-40 ~ 85	24-QSOP	Obsolete	ROHS3 Compliant	1	3808

Engineering Selection Recommendations

All listed substitute parts meet the core electrical and mechanical parameters required for direct substitution with the PI3C3861Q. Selection should prioritize product status and compliance requirements:

For new designs or long-term procurement: SN74CBTLV3861DBQR (Texas Instruments) is the preferred choice. This part carries active product status, ROHS3 compliance, and the highest current inventory (5406 units). The MSL rating of 2 (1 Year) is acceptable for standard manufacturing environments.

For designs requiring RoHS3 compliance with active product status: 74CBTLV3861QG (Renesas Electronics Corporation) provides an alternative with active status, ROHS3 compliance, and MSL 1 rating. Inventory availability is 3700 units.

For existing designs with established supply chains: PI3C3861-AQE (Diodes Incorporated) maintains the original manufacturer relationship while offering ROHS3 compliance. This part is obsolete but remains in stock (1622 units).

For legacy system maintenance: QS3VH384QG (Renesas Electronics Corporation) is electrically equivalent but carries obsolete status. Use only when existing designs are locked to this specific part number.

Frequently Asked Questions (FAQ)

Q: Can I substitute PI3C3861Q with any of the listed parts without PCB redesign?

A: Yes. All substitute parts share identical electrical parameters (voltage supply 2.3V ~ 3.6V, operating temperature -40°C ~ 85°C) and the same 24-pin SSOP/QSOP footprint. No circuit modifications are required.

Q: What is the difference between 24-QSOP and 24-SSOP packaging?

A: Both designations refer to the same physical footprint (0.154" width, 3.90mm). QSOP and SSOP are equivalent package types used by different manufacturers. Pin pitch and land pattern are identical.

Q: Why does SN74CBTLV3861DBQR have MSL 2 instead of MSL 1?

A: MSL (Moisture Sensitivity Level) indicates the maximum time a component can be stored in ambient conditions before requiring baking. MSL 2 (1 Year) is more restrictive than MSL 1 (Unlimited) but remains acceptable for standard manufacturing processes. This does not affect electrical performance.

Q: Are all substitute parts ROHS3 compliant?

A: No. The original PI3C3861Q is RoHS non-compliant. All substitute parts listed (PI3C3861-AQE, SN74CBTLV3861DBQR, 74CBTLV3861QG, QS3VH384QG) are ROHS3 compliant. If RoHS compliance is required, any of these substitutes are suitable.

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

A: SN74CBTLV3861DBQR carries active product status from Texas Instruments, indicating ongoing manufacturing support. This part is the most suitable for designs requiring extended production runs or future procurement.

Q: Can I mix different substitute parts in the same production batch?

A: Yes. All parts are parametrically equivalent and will function identically in the circuit. However, mixing manufacturers may introduce minor variations in propagation delay or capacitance within specified tolerances. For critical timing applications, maintain consistency within a single production lot.

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