PI3B3244LE Equivalent & Substitute Parts

Part Overview

The PI3B3244LE is a 4 x 1:1 bus switch logic IC manufactured by Diodes Incorporated in a 20-TSSOP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The PI3B3244LE operates as a single-supply bus switch with a voltage range of 3V to 3.6V and an operating temperature range of -40°C to 85°C. Substitute parts must maintain functional equivalence in circuit topology, package compatibility, and electrical performance within specified operating parameters.

Substiute Parts

PI3B3244LE

Diodes IncorporatedIn Stock: 3560PI3B3244LE Datasheet

Current PartRFQ

74CBTLV3244PGG

IDT, Integrated Device Technology IncIn Stock: 144974CBTLV3244PGG Datasheet

MFR RecommendedRFQ

74CBTLV3244PGG8

Renesas Electronics CorporationIn Stock: 105474CBTLV3244PGG8 Datasheet

MFR RecommendedRFQ

SN74CB3Q3244DBQR

Texas InstrumentsIn Stock: 3070SN74CB3Q3244DBQR Datasheet

MFR RecommendedRFQ

SN74CB3Q3244DGVR

Texas InstrumentsIn Stock: 5297SN74CB3Q3244DGVR Datasheet

MFR RecommendedRFQ

SN74CB3Q3244PW

Texas InstrumentsIn Stock: 4511SN74CB3Q3244PW Datasheet

MFR RecommendedRFQ

SN74CB3Q3244PWR

Texas InstrumentsIn Stock: 23256SN74CB3Q3244PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PI3B3244LE are qualified based on the following critical parameters:

• Circuit configuration: 4 x 1:1 bus switch topology with 2 independent circuits
• Voltage supply range compatibility: Parts must operate within or encompass the 3V to 3.6V range
• Operating temperature range: -40°C to 85°C
• Mounting type: Surface mount only
• Package compatibility: 20-pin packages (TSSOP, SSOP, TVSOP variants acceptable)
• RoHS3 compliance and REACH unaffected status

Substitute parts are grouped into three categories based on package type and manufacturer:

1. 20-TSSOP Package (Direct Pin-Compatible): 74CBTLV3244PGG, 74CBTLV3244PGG8, SN74CB3Q3244PW, SN74CB3Q3244PWR
2. 20-TVSOP Package (Alternate Form Factor): SN74CB3Q3244DGVR
3. 20-SSOP Package (Compact Variant): SN74CB3Q3244DBQR

All substitute parts maintain the 4 x 1:1 circuit configuration, single-supply operation, and -40°C to 85°C temperature range. Voltage supply ranges for active substitutes extend to 2.3V minimum, providing broader operational flexibility than the original part.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (20-TSSOP Package):

SN74CB3Q3244PWR is the primary recommendation. This Texas Instruments part maintains active product status with the highest inventory availability (23,200 pcs), ROHS3 compliance, MSL 1 rating, and identical 20-TSSOP package footprint. The extended voltage range (2.3V to 3.6V) provides operational margin below the original 3V minimum specification.

SN74CB3Q3244PW offers equivalent functionality in Tube packaging with Last Time Buy status. This part is suitable for applications where existing inventory must be consumed before transition to active alternatives.

74CBTLV3244PGG (IDT) and 74CBTLV3244PGG8 (Renesas) provide alternative 20-TSSOP solutions with active product status. The Renesas variant includes Tape & Reel packaging and ROHS3 compliance with MSL 1 rating.

For Package Variant Applications:

SN74CB3Q3244DGVR accommodates designs requiring 20-TVSOP form factor with active status, MSL 1 rating, and 5,200 pcs inventory availability.

SN74CB3Q3244DBQR supports compact PCB layouts using 20-SSOP packaging. This part carries active status and ROHS3 compliance but has MSL 2 rating (1-year shelf life), requiring controlled storage conditions.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original PI3B3244LE certification requirements. MSL 1 rated parts (SN74CB3Q3244PWR, SN74CB3Q3244PW, SN74CB3Q3244DGVR, 74CBTLV3244PGG8) require no special moisture control during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can SN74CB3Q3244PWR directly replace PI3B3244LE in existing designs?

A: Yes. Both parts share identical 20-TSSOP package pinout, 4 x 1:1 circuit configuration, 2 independent circuits, single-supply operation, and -40°C to 85°C temperature range. The extended voltage range of SN74CB3Q3244PWR (2.3V to 3.6V) encompasses the original 3V to 3.6V specification, ensuring full compatibility.

Q: What is the difference between 20-TSSOP, 20-SSOP, and 20-TVSOP packages?

A: These are distinct surface-mount package variants with different physical dimensions. 20-TSSOP (0.173" width) and 20-TVSOP (0.173" width) are pin-compatible and interchangeable on the same PCB footprint. 20-SSOP (0.154" width) is more compact and requires a different PCB footprint. Package selection depends on available board space and manufacturing capabilities.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitutes except 74CBTLV3244PGG (IDT) explicitly state ROHS3 compliance. The IDT part does not specify RoHS status in the provided data. For applications requiring mandatory ROHS3 certification, use SN74CB3Q3244PWR, SN74CB3Q3244PW, SN74CB3Q3244DGVR, SN74CB3Q3244DBQR, or 74CBTLV3244PGG8.

Q: What does MSL 1 versus MSL 2 mean for component handling?

A: MSL (Moisture Sensitivity Level) 1 rated parts have unlimited shelf life and require no special moisture control during storage and handling. MSL 2 rated parts (SN74CB3Q3244DBQR) have a 1-year shelf life and require controlled storage conditions to prevent moisture absorption. MSL 1 parts are preferred for applications with extended inventory holding periods.

Q: Which substitute has the best inventory availability?

A: SN74CB3Q3244PWR offers the highest inventory with 23,200 pcs in stock, followed by SN74CB3Q3244PW (4,439 pcs) and SN74CB3Q3244DGVR (5,200 pcs). For immediate procurement needs, SN74CB3Q3244PWR is the optimal choice.

Q: Can I use 74CBTLV3244PGG as a substitute if my design is already in production?

A: Yes, provided your PCB footprint accommodates the 20-TSSOP package. The 74CBTLV3244PGG maintains identical circuit configuration, voltage range compatibility, and temperature specifications. Verify component availability and lead times with your supplier, as inventory levels may vary.

Q: What is the significance of "Last Time Buy" status for SN74CB3Q3244PW?

A: Last Time Buy status indicates that Texas Instruments will discontinue this part after current inventory is exhausted. While the part remains functional and suitable for replacement applications, new designs should transition to active alternatives such as SN74CB3Q3244PWR to ensure long-term supply continuity.