PI3B16244A Bus Switch 4 x 1:1 Equivalent & Substitute Parts

Part Overview

The PI3B16244A is a bus switch IC manufactured by Diodes Incorporated, designed for 4 x 1:1 switching applications in logic circuits. This component operates as a single-supply device with a voltage range of 3V to 3.6V and supports surface mount installation in a 48-TSSOP package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI3B16244A
Manufacturer	Diodes Incorporated
Type	Bus Switch
Circuit Configuration	4 x 1:1
Independent Circuits	4
Voltage Supply Source	Single Supply
Voltage - Supply Range	3V ~ 3.6V
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	48-TFSOP (0.240", 6.10mm Width)
Supplier Device Package	48-TSSOP
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the PI3B16244A is determined by the following critical parameters:

Circuit Configuration: 4 x 1:1 bus switch topology
Independent Circuits: 4 circuits minimum
Voltage Supply Source: Single supply operation
Operating Temperature Range: -40°C to 85°C minimum
Mounting Type: Surface mount
Package Compatibility: 48-TSSOP or 48-SSOP (mechanically compatible)

Substitute parts must maintain identical circuit configuration and independent circuit count. Voltage supply range compatibility is evaluated based on overlap with the original specification. All substitute parts listed operate within the required temperature range and use compatible surface mount packages.

Parameter Comparison

Parameter	PI3B16244A (Diodes)	QS3VH16244PAG (IDT)	QS3VH16244PAG8 (IDT)	SN74CB3Q16244DGGR (TI)	SN74CB3Q16244DL (TI)	SN74CB3Q16244DLR (TI)
Type	Bus Switch	Bus Switch	Bus Switch	Bus Switch	Bus Switch	Bus Switch
Circuit Configuration	4 x 1:1	4 x 1:1	4 x 1:1	4 x 1:1	4 x 1:1	4 x 1:1
Independent Circuits	4	4	4	4	4	4
Voltage Supply Source	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
Operating Temperature Range	-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
Package / Case	48-TFSOP (0.240", 6.10mm)	48-TFSOP (0.240", 6.10mm)	48-TFSOP (0.240", 6.10mm)	48-TFSOP (0.240", 6.10mm)	48-BSSOP (0.295", 7.50mm)	48-BSSOP (0.295", 7.50mm)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed maintain functional equivalence to the PI3B16244A through identical circuit configuration, independent circuit count, and operating temperature specifications. The following factors apply to selection:

IDT QS3VH Series (QS3VH16244PAG, QS3VH16244PAG8): These parts provide direct functional substitution with extended voltage supply range (2.3V to 3.6V) and identical 48-TFSOP packaging. Both variants are active products with high inventory availability. The QS3VH16244PAG8 variant offers the highest stock level at 12,445 units.

Texas Instruments 74CB Series (SN74CB3Q16244DGGR, SN74CB3Q16244DL, SN74CB3Q16244DLR): These parts provide functional substitution with ROHS3 compliance certification. The SN74CB3Q16244DGGR maintains identical 48-TFSOP packaging. The SN74CB3Q16244DL and SN74CB3Q16244DLR variants use 48-BSSOP packaging (0.295", 7.50mm width), which requires PCB layout verification for mechanical compatibility.

For applications requiring RoHS compliance, Texas Instruments variants are the appropriate selection. For direct package compatibility without compliance requirements, IDT QS3VH variants provide immediate substitution.

Frequently Asked Questions (FAQ)

Q: Can the PI3B16244A be directly replaced with any of these substitute parts?

A: Functional substitution is possible for all listed parts based on circuit configuration and operating parameters. However, package compatibility must be verified. The IDT QS3VH16244PAG and QS3VH16244PAG8, along with SN74CB3Q16244DGGR, use identical 48-TFSOP packaging. The SN74CB3Q16244DL and SN74CB3Q16244DLR use 48-BSSOP packaging, which has different physical dimensions and requires PCB layout assessment.

Q: What is the voltage supply range difference between the original part and substitutes?

A: The PI3B16244A operates at 3V to 3.6V. All substitute parts operate at 2.3V to 3.6V, providing extended lower voltage capability. This extended range is backward compatible with the original specification.

Q: Are there compliance differences between substitute options?

A: The PI3B16244A is RoHS non-compliant. The Texas Instruments 74CB series (SN74CB3Q16244DGGR, SN74CB3Q16244DL, SN74CB3Q16244DLR) are ROHS3 compliant. The IDT QS3VH series compliance status is not specified in the provided data. For applications requiring RoHS certification, Texas Instruments variants are the specified choice.

Q: What packaging considerations apply to the Texas Instruments variants?

A: The SN74CB3Q16244DGGR uses 48-TFSOP packaging (0.240", 6.10mm width), identical to the original part. The SN74CB3Q16244DL and SN74CB3Q16244DLR use 48-BSSOP packaging (0.295", 7.50mm width), which is physically larger. PCB footprint and layout space must be verified before selecting these variants.

Q: Which substitute part has the highest inventory availability?

A: The QS3VH16244PAG8 from IDT has the highest inventory at 12,445 units in stock, followed by QS3VH16244PAG at 3,691 units.

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