PI5C3245Q Equivalent & Substitute Parts

Part Overview

The PI5C3245Q is an 8 x 1:1 bus switch logic IC manufactured by Diodes Incorporated in a 20-QSOP package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. Bus switches of this configuration are used for signal routing and multiplexing applications in digital systems requiring high-speed switching with minimal propagation delay.

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 / Case	20-SSOP (0.154", 3.90mm Width)
Supplier Device Package	20-QSOP
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI5C3245Q is determined by the following critical parameters:

Circuit Configuration: 8 x 1:1 topology (one exception: QS32245QG with 1 x 8:1 configuration)
Supply Voltage Range: Compatibility within 4V ~ 5.5V envelope
Operating Temperature: -40°C ~ 85°C range
Package Type: 20-pin surface mount variants (QSOP, SSOP, TSSOP, TVSOP)
Functional Equivalence: Bus switch logic with identical switching characteristics

Substitute parts are grouped into two categories: direct equivalents with matching 8 x 1:1 configuration and alternative topology (1 x 8:1) that provides functional equivalence through different internal architecture.

Parameter Comparison

Part Number	Manufacturer	Circuit Config	Supply Voltage	Temp Range	Package Type	Product Status	RoHS Status
PI5C3245Q	Diodes Incorporated	8 x 1:1	4.75V ~ 5.25V	-40°C ~ 85°C	20-QSOP	Obsolete	Non-compliant
QS3245QG	Renesas Electronics	8 x 1:1	4.75V ~ 5.25V	-40°C ~ 85°C	20-QSOP	Active	ROHS3 Compliant
QS3245QG8	Renesas Electronics	8 x 1:1	4.75V ~ 5.25V	-40°C ~ 85°C	20-QSOP	Active	ROHS3 Compliant
FST3245MTCX	onsemi	8 x 1:1	4V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Obsolete	ROHS3 Compliant
QS32245QG	IDT	1 x 8:1	4.75V ~ 5.25V	-40°C ~ 85°C	20-QSOP	Active	Not specified
SN74CBT3245ADBQR	Texas Instruments	8 x 1:1	4V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Last Time Buy	ROHS3 Compliant
SN74CBT3245ADBR	Texas Instruments	8 x 1:1	4V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Last Time Buy	ROHS3 Compliant
SN74CBT3245ADGVR	Texas Instruments	8 x 1:1	4V ~ 5.5V	-40°C ~ 85°C	20-TVSOP	Last Time Buy	ROHS3 Compliant
SN74CBT3245APW	Texas Instruments	8 x 1:1	4V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Last Time Buy	ROHS3 Compliant
SN74CBT3245APWR	Texas Instruments	8 x 1:1	4V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Last Time Buy	ROHS3 Compliant
SN74CBT3245CDBQR	Texas Instruments	8 x 1:1	4V ~ 5.5V	-40°C ~ 85°C	20-SSOP	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, RoHS3 Compliant)

QS3245QG and QS3245QG8 from Renesas Electronics represent the most direct substitutes for the PI5C3245Q. Both maintain identical circuit configuration (8 x 1:1), supply voltage specification (4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C), and 20-QSOP package footprint. Both parts carry Active product status and ROHS3 compliance, providing long-term availability and regulatory alignment. QS3245QG is supplied in Tube packaging, while QS3245QG8 is supplied in Tape & Reel format.

SN74CBT3245CDBQR from Texas Instruments is an Active product with ROHS3 compliance. This part maintains the 8 x 1:1 configuration and -40°C ~ 85°C operating range but uses a 20-SSOP package variant (0.154", 3.90mm width) and operates across a wider supply voltage range (4V ~ 5.5V). This part is suitable for designs where package footprint compatibility is achievable.

Secondary Substitutes (Last Time Buy Status)

SN74CBT3245ADBQR, SN74CBT3245ADBR, SN74CBT3245ADGVR, SN74CBT3245APW, and SN74CBT3245APWR from Texas Instruments are classified as Last Time Buy. These parts maintain the 8 x 1:1 configuration and full temperature range compatibility but are subject to end-of-life constraints. All carry ROHS3 compliance. Package variants include 20-SSOP and 20-TSSOP/TVSOP options with supply voltage range of 4V ~ 5.5V.

Alternative Topology (Functional Equivalence)

QS32245QG from IDT provides functional equivalence through a 1 x 8:1 configuration rather than 8 x 1:1. This part maintains the 20-QSOP package, 4.75V ~ 5.25V supply voltage, and -40°C ~ 85°C operating range. The alternative topology requires circuit-level evaluation to confirm functional compatibility in the target application.

Obsolete Status Consideration

FST3245MTCX from onsemi is classified as Obsolete. While it maintains the 8 x 1:1 configuration and temperature range, it uses a 20-TSSOP package and operates across 4V ~ 5.5V. ROHS3 compliance is confirmed. This part should be considered only when other active alternatives are unavailable.

Frequently Asked Questions (FAQ)

Q: Can QS3245QG directly replace PI5C3245Q in existing designs?

A: Yes. QS3245QG maintains identical circuit configuration (8 x 1:1), supply voltage specification (4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C), and 20-QSOP package footprint. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant), both favoring the substitute.

Q: What is the difference between QS3245QG and QS3245QG8?

A: Both parts are functionally identical with matching electrical specifications and 20-QSOP package. The difference is packaging format: QS3245QG is supplied in Tube, while QS3245QG8 is supplied in Tape & Reel (TR). Selection depends on procurement and assembly requirements.

Q: Can Texas Instruments SN74CBT3245 series parts replace PI5C3245Q?

A: SN74CBT3245 series parts maintain the 8 x 1:1 configuration and -40°C ~ 85°C operating range but differ in package type and supply voltage range. SN74CBT3245CDBQR (Active status) is the preferred Texas Instruments option. Last Time Buy variants (ADBQR, ADBR, ADGVR, APW, APWR) are available but subject to end-of-life constraints.

Q: What package differences exist among substitute parts?

A: Substitute parts use four package variants: 20-QSOP (0.154", 3.90mm width), 20-SSOP (0.154", 3.90mm width), 20-TSSOP (0.173", 4.40mm width), and 20-TVSOP (0.173", 4.40mm width). Package selection affects PCB layout compatibility. Verify footprint compatibility before design implementation.

Q: Is QS32245QG (1 x 8:1 configuration) compatible with PI5C3245Q (8 x 1:1)?

A: QS32245QG provides functional equivalence through alternative internal topology. While electrical parameters align (supply voltage, temperature range, 20-QSOP package), the 1 x 8:1 configuration differs from the 8 x 1:1 topology. Circuit-level evaluation is required to confirm functional compatibility in the specific application.

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

A: QS3245QG and QS3245QG8 from Renesas Electronics carry Active product status, indicating ongoing production and long-term availability. Both maintain full electrical and package compatibility with PI5C3245Q.

Q: Are all substitute parts RoHS compliant?

A: No. PI5C3245Q is RoHS non-compliant. All recommended substitutes (QS3245QG, QS3245QG8, SN74CBT3245 series) carry ROHS3 compliance. FST3245MTCX also carries ROHS3 compliance. Verify RoHS requirements for your application before selection.

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