PI5C3245QEX Equivalent & Substitute Parts

Part Overview

The PI5C3245QEX is an 8 x 1:1 bus switch logic IC manufactured by Diodes Incorporated in a 20-QSOP surface mount package. This component functions as a high-speed digital switch for multiplexing and demultiplexing applications in logic circuits. The part is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for design continuity and long-term supply chain planning.

Key Parameters

Parameter	Value
Type	Bus Switch
Circuit Configuration	8 x 1:1
Independent Circuits	1
Voltage Supply	Single Supply
Supply Voltage Range	4.75V ~ 5.25V
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package	20-SSOP (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the PI5C3245QEX is determined by the following parameters:

Circuit Type & Configuration: 8 x 1:1 bus switch topology
Supply Voltage Range: 4.75V ~ 5.25V (primary range) or 4V ~ 5.5V (extended range)
Operating Temperature: -40°C ~ 85°C
Package Type: 20-SSOP or 20-QSOP (mechanically and electrically equivalent)
Compliance: ROHS3 compliance and REACH unaffected status

Parts are grouped into three categories based on manufacturer recommendation status and parametric alignment:

Direct Equivalent: QS3245QG (Renesas Electronics) — identical circuit configuration and primary voltage range.

Manufacturer Recommended: QS32245QG (IDT), SN74CBT3245ADBQR (Texas Instruments), SN74CBT3245CDBQR (Texas Instruments) — verified cross-references with matching or compatible electrical specifications.

Parametric Equivalent: QS3245QG8 (Renesas Electronics) — identical parameters with alternative packaging designation.

Parameter Comparison

Parameter	PI5C3245QEX	QS3245QG	QS32245QG	SN74CBT3245ADBQR	SN74CBT3245CDBQR	QS3245QG8
Manufacturer	Diodes Inc.	Renesas	IDT	Texas Instruments	Texas Instruments	Renesas
Circuit Configuration	8 x 1:1	8 x 1:1	1 x 8:1	8 x 1:1	8 x 1:1	8 x 1:1
Supply Voltage Range	4.75V ~ 5.25V	4.75V ~ 5.25V	4.75V ~ 5.25V	4V ~ 5.5V	4V ~ 5.5V	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	20-QSOP	20-QSOP	20-QSOP	20-SSOP	20-SSOP	20-QSOP
Product Status	Last Time Buy	Active	Active	Last Time Buy	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	Not specified	2 (1 Year)	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

For Active Product Status Requirement: Select QS3245QG, QS32245QG, SN74CBT3245CDBQR, or QS3245QG8. These parts maintain active manufacturing status, ensuring long-term availability and supply chain stability.

For Identical Voltage Range (4.75V ~ 5.25V): QS3245QG, QS32245QG, and QS3245QG8 operate within the original supply voltage specification. SN74CBT3245ADBQR and SN74CBT3245CDBQR support an extended range (4V ~ 5.5V), providing additional design margin.

For MSL Rating Consideration: QS3245QG and QS3245QG8 maintain MSL 1 (Unlimited) rating, matching the original part's moisture sensitivity specification. SN74CBT3245ADBQR and SN74CBT3245CDBQR carry MSL 2 (1 Year) rating, requiring controlled storage conditions.

For ROHS3 Compliance: All recommended substitutes except QS32245QG are explicitly ROHS3 compliant, maintaining regulatory alignment with the original design.

Frequently Asked Questions (FAQ)

Q: Can QS32245QG be used as a direct replacement for PI5C3245QEX?

A: QS32245QG is functionally equivalent but features a 1 x 8:1 circuit configuration compared to the 8 x 1:1 topology of PI5C3245QEX. Both configurations perform bus switching with identical pin counts and package dimensions. Verify PCB layout and signal routing compatibility before substitution.

Q: What is the difference between 20-QSOP and 20-SSOP packaging?

A: Both are 20-pin surface mount packages with 0.154" (3.90mm) width. QSOP and SSOP designations indicate slight variations in lead pitch and body dimensions. Parts specified in either package type are mechanically and electrically interchangeable for this application.

Q: Why do Texas Instruments parts have a wider voltage range (4V ~ 5.5V)?

A: SN74CBT3245ADBQR and SN74CBT3245CDBQR support extended supply voltage tolerance. This specification difference does not prevent substitution in designs operating within the original 4.75V ~ 5.25V range.

Q: Is MSL 2 (1 Year) acceptable for designs currently using MSL 1 (Unlimited)?

A: MSL 2 rating requires moisture control during storage and handling. If your supply chain and manufacturing processes do not include controlled humidity storage, MSL 1 parts (QS3245QG, QS3245QG8) are preferred to eliminate moisture sensitivity management.

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

A: QS3245QG, SN74CBT3245CDBQR, and QS3245QG8 maintain Active product status. SN74CBT3245CDBQR from Texas Instruments and QS3245QG from Renesas Electronics represent the most established long-term supply sources.

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