PI3B3245QEX Equivalent & Substitute Parts

Part Overview

The PI3B3245QEX is an 8 x 1:1 bus switch logic IC manufactured by Diodes Incorporated in a 20-QSOP surface mount package. This component operates across a single supply voltage range of 3V to 3.6V with an operating temperature range of -40°C to 85°C. The part is currently in active production status and maintains full ROHS3 compliance with unlimited moisture sensitivity rating (MSL 1).

Bus switch ICs are essential for multiplexing and signal routing applications in digital systems. Alternative equivalent parts may be required due to supply constraints, packaging preferences, or design optimization needs while maintaining functional compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI3B3245QEX
Manufacturer	Diodes Incorporated
Type	Bus Switch
Circuit Configuration	8 x 1:1
Independent Circuits	1
Voltage Supply Range	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.154", 3.90mm Width)
Supplier Device Package	20-QSOP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the PI3B3245QEX is determined by the following critical parameters:

Functional Compatibility Requirements:

Circuit configuration: 8 x 1:1 bus switch topology
Independent circuits: 1
Mounting type: Surface mount
Operating temperature range: -40°C to 85°C minimum
Voltage supply compatibility: Parts must operate within or encompass the 3V to 3.6V range

Compliance & Environmental Requirements:

RoHS3 compliance status
Moisture sensitivity level (MSL 1 preferred for unlimited shelf life)
REACH unaffected status

Package Compatibility: Substitute parts are grouped by package type. The PI3B3245QEX uses a 20-SSOP package. Equivalent parts may use alternative 20-pin surface mount packages (20-TSSOP, 20-TVSOP) provided the physical dimensions and pin configurations support direct substitution in the target PCB layout.

Parameter Comparison

Part Number	Manufacturer	Circuit	Voltage Supply	Operating Temp	Package	MSL	Product Status
PI3B3245QEX	Diodes Incorporated	8 x 1:1	3V ~ 3.6V	-40°C ~ 85°C	20-SSOP	1	Active
74CBTLV3245PGG	Renesas Electronics	8 x 1:1	2.3V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	1	Active
SN74CB3Q3245DBQR	Texas Instruments	8 x 1:1	2.3V ~ 3.6V	-40°C ~ 85°C	20-SSOP	2	Active
SN74CB3Q3245PW	Texas Instruments	8 x 1:1	2.3V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	1	Last Time Buy
SN74CB3Q3245PWR	Texas Instruments	8 x 1:1	2.3V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	1	Active
SN74CBTLV3245ADBQR	Texas Instruments	8 x 1:1	2.3V ~ 3.6V	-40°C ~ 85°C	20-SSOP	2	Active
SN74CBTLV3245ADGVR	Texas Instruments	8 x 1:1	2.3V ~ 3.6V	-40°C ~ 85°C	20-TVSOP	1	Active
SN74CBTLV3245APW	Texas Instruments	8 x 1:1	2.3V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	1	Last Time Buy
SN74CBTLV3245APWR	Texas Instruments	8 x 1:1	2.3V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	1	Active

Engineering Selection Recommendations

Direct Package Match (20-SSOP): SN74CB3Q3245DBQR and SN74CBTLV3245ADBQR provide identical package footprints to the PI3B3245QEX. Both are ROHS3 compliant and operate within the required temperature range. SN74CB3Q3245DBQR maintains active production status with higher inventory availability (4224 units). SN74CBTLV3245ADBQR also maintains active status with substantial inventory (23459 units).

Extended Voltage Range Compatibility: All substitute parts operate across 2.3V to 3.6V, which encompasses the PI3B3245QEX operating range of 3V to 3.6V. This provides additional design flexibility for systems requiring lower voltage operation.

Packaging Alternatives: For designs permitting package variation, 20-TSSOP alternatives (SN74CB3Q3245PWR, SN74CBTLV3245APWR) offer active production status with substantial inventory levels. SN74CB3Q3245PWR provides the highest inventory availability at 23200 units. The 20-TVSOP variant (SN74CBTLV3245ADGVR) is suitable for space-constrained applications.

Production Status Considerations: Parts designated as "Last Time Buy" (SN74CB3Q3245PW, SN74CBTLV3245APW) remain available but represent end-of-life products. Active status parts are recommended for new designs requiring long-term supply assurance.

Moisture Sensitivity: The PI3B3245QEX carries MSL 1 (unlimited shelf life). Substitute parts with MSL 1 rating (74CBTLV3245PGG, SN74CB3Q3245PW, SN74CB3Q3245PWR, SN74CBTLV3245ADGVR, SN74CBTLV3245APWR) maintain identical moisture handling requirements. Parts with MSL 2 rating (SN74CB3Q3245DBQR, SN74CBTLV3245ADBQR) require one-year shelf life management.

Frequently Asked Questions (FAQ)

Q: Can I substitute the PI3B3245QEX with any of these parts without PCB redesign?

A: Direct substitution without PCB modification is possible only with parts using the identical 20-SSOP package: SN74CB3Q3245DBQR and SN74CBTLV3245ADBQR. These maintain the same pin pitch and footprint dimensions (0.154", 3.90mm width). Alternative packages require PCB layout modifications.

Q: What is the voltage supply difference between the PI3B3245QEX and substitute parts?

A: The PI3B3245QEX operates at 3V to 3.6V. All substitute parts operate at 2.3V to 3.6V. This extended lower voltage range in substitutes is fully compatible with the original part's operating window and provides additional design flexibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the environmental compliance profile of the PI3B3245QEX.

Q: What is the difference between MSL 1 and MSL 2 ratings?

A: MSL 1 (Unlimited) allows indefinite shelf life storage under controlled conditions. MSL 2 (1 Year) requires component use within one year of manufacture. For applications with extended inventory holding periods, MSL 1 parts are preferred.

Q: Which substitute offers the best inventory availability?

A: SN74CB3Q3245PWR (Texas Instruments) provides the highest inventory level at 23200 units. This part is in active production status with a 20-TSSOP package and MSL 1 rating.

Q: Can I use a 20-TSSOP package part as a substitute for the 20-SSOP original?

A: Package substitution requires PCB redesign. While both are 20-pin surface mount packages, the 20-TSSOP has different physical dimensions (0.173", 4.40mm width versus 0.154", 3.90mm width). Footprint compatibility must be verified before implementation.

Q: Are there any parts approaching end-of-life status?

A: SN74CB3Q3245PW and SN74CBTLV3245APW are designated as "Last Time Buy," indicating discontinued production. These parts remain available but should not be selected for new designs requiring long-term supply continuity.

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