PI3B3384QE Equivalent & Substitute Parts

Part Overview

The PI3B3384QE is a Bus Switch 5 x 1:1 logic IC manufactured by Diodes Incorporated in a 24-QSOP package. This component functions as a multiplexer for digital signal routing with five independent 1:1 switching circuits. The part is classified as Obsolete, which necessitates identification of functionally equivalent alternatives from active product lines for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI3B3384QE
Manufacturer	Diodes Incorporated
Type	Bus Switch
Circuit Configuration	5 x 1:1
Independent Circuits	2
Voltage Supply Source	Single Supply
Voltage - Supply Range	3V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	24-SSOP (0.154", 3.90mm Width)
Supplier Device Package	24-QSOP
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI3B3384QE is determined by the following critical parameters:

Circuit Configuration: 5 x 1:1 topology (mandatory match)
Independent Circuits: 2 circuits (mandatory match)
Voltage Supply Source: Single Supply (mandatory match)
Operating Temperature Range: -40°C ~ 85°C (mandatory match)
Mounting Type: Surface Mount (mandatory match)
Package Compatibility: 24-pin packages (24-QSOP, 24-QSOP, 24-TSSOP, 24-SSOP, 24-TVSOP acceptable)

All substitute parts listed maintain identical circuit topology, temperature performance, and supply voltage characteristics. Voltage supply range expansion from 3V ~ 3.6V to 2.3V ~ 3.6V in substitute parts represents backward compatibility. Package variations (QSOP, TSSOP, SSOP, TVSOP) are mechanically and electrically interchangeable within the 24-pin footprint family, with minor dimensional differences in width (0.154" to 0.173").

Parameter Comparison

Parameter	PI3B3384QE	74CBTLV3384QG8	74CBTLV3384PGG8	74CBTLV3384QG	SN74CB3Q3384ADBQR	SN74CB3Q3384ADGVR	SN74CB3Q3384APW	SN74CB3Q3384APWR	SN74CBTLV3384DBQR	SN74CBTLV3384DGVR
Manufacturer	Diodes Inc.	IDT	Renesas	IDT	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Type	Bus Switch	Bus Switch	Bus Switch	Bus Switch	Bus Switch	Bus Switch	Bus Switch	Bus Switch	Bus Switch	Bus Switch
Circuit Configuration	5 x 1:1	5 x 1:1	5 x 1:1	5 x 1:1	5 x 1:1	5 x 1:1	5 x 1:1	5 x 1:1	5 x 1:1	5 x 1:1
Independent Circuits	2	2	2	2	2	2	2	2	2	2
Voltage Supply Source	Single Supply	Single Supply	Single Supply	Single Supply	Single Supply	Single Supply	Single Supply	Single Supply	Single Supply	Single Supply
Voltage - Supply Range	3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V
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	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	24-SSOP (0.154")	24-SSOP (0.154")	24-TSSOP (0.173")	24-SSOP (0.154")	24-SSOP (0.154")	24-TFSOP (0.173")	24-TSSOP (0.173")	24-TSSOP (0.173")	24-SSOP (0.154")	24-TFSOP (0.173")
Product Status	Obsolete	Active	Active	Active	Active	Active	Last Time Buy	Active	Active	Active
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	Not specified	1 (Unlimited)	Not specified	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

For direct replacement in 24-SSOP (0.154" width) footprint applications, select from:

74CBTLV3384QG (IDT, Active status, 31,145 units in stock)
74CBTLV3384QG8 (IDT, Active status, 9,353 units in stock)
SN74CBTLV3384DBQR (Texas Instruments, Active status, 4,615 units in stock)

These parts maintain identical package dimensions and electrical specifications with expanded voltage supply range (2.3V ~ 3.6V), providing backward compatibility with the original 3V ~ 3.6V requirement.

Secondary Substitutes (Package Variant - 24-TSSOP/24-TFSOP)

For applications permitting 24-TSSOP (0.173" width) or 24-TFSOP footprint variants:

74CBTLV3384PGG8 (Renesas, Active status, 6,100 units in stock)
SN74CB3Q3384APW (Texas Instruments, Last Time Buy status, 2,260 units in stock)
SN74CB3Q3384ADGVR (Texas Instruments, Active status, 1,306 units in stock)
SN74CBTLV3384DGVR (Texas Instruments, Active status, 5,965 units in stock)

Compliance Considerations

All substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the original PI3B3384QE. Moisture sensitivity levels vary between MSL 1 (Unlimited) and MSL 2 (1 Year); designs requiring extended storage or high-humidity environments should prioritize MSL 1 rated alternatives.

Inventory Availability

Texas Instruments SN74CB3Q3384APWR offers the highest inventory availability (50,100 units) with Active product status and MSL 1 rating, suitable for high-volume procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the PI3B3384QE with any of the listed alternatives?

A: Substitution is valid only when the application circuit topology matches the 5 x 1:1 configuration with 2 independent circuits. All listed alternatives maintain this topology and operating temperature range. Package footprint compatibility must be confirmed for PCB layout; 24-SSOP variants are direct mechanical replacements, while 24-TSSOP and 24-TFSOP variants require PCB redesign.

Q: What is the significance of the expanded voltage supply range (2.3V ~ 3.6V) in substitute parts?

A: The substitute parts operate across a wider voltage range than the original PI3B3384QE (3V ~ 3.6V). This expansion provides additional design flexibility and does not affect compatibility with circuits designed for the original 3V ~ 3.6V specification, as the original range is fully contained within the substitute range.

Q: Are there package differences between 24-QSOP, 24-SSOP, 24-TSSOP, and 24-TVSOP?

A: All are 24-pin surface mount packages with identical pin pitch and electrical characteristics. Primary differences are package width: 24-SSOP and 24-QSOP measure 0.154" (3.90mm), while 24-TSSOP and 24-TFSOP measure 0.173" (4.40mm). PCB footprints are not interchangeable without layout modification.

Q: What does "Last Time Buy" product status mean for SN74CB3Q3384APW?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this part number. Existing inventory is available for purchase, but no future production is planned. For new designs or long-term production requirements, select from Active status alternatives.

Q: How do MSL ratings affect component handling and storage?

A: MSL 1 (Unlimited) components have no moisture sensitivity restrictions and can be stored indefinitely in standard conditions. MSL 2 (1 Year) components must be used within one year of packaging opening or stored in controlled humidity environments. For applications with extended lead times or inventory holding periods, prioritize MSL 1 rated parts.

Q: Which substitute offers the best balance of availability, compliance, and active product status?

A: SN74CB3Q3384APWR (Texas Instruments) combines the highest inventory availability (50,100 units), Active product status, ROHS3 compliance, MSL 1 rating, and 24-TSSOP package. For applications requiring 24-SSOP footprint, 74CBTLV3384QG (IDT) provides 31,145 units in stock with Active status.

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