INA303A2IPW Equivalent & Substitute Parts

Part Overview

The INA303A2IPW is a current sense regulator IC manufactured by Texas Instruments, designed for high/low-side current sensing applications. This Surface Mount device operates across an input voltage range of 0V to 36V and functions within an operating temperature range of -40°C to 125°C. The component is housed in a 14-TSSOP package and maintains Active product status with full ROHS3 compliance and REACH unaffected certification.

Substitute parts become necessary when the primary component reaches end-of-life status, inventory constraints occur, or design flexibility is required across manufacturing batches while maintaining identical electrical and mechanical specifications.

Key Parameters

Parameter	Specification
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Current Sense
Sensing Method	High/Low-Side
Voltage - Input	0V ~ 36V
Operating Temperature	-40°C ~ 125°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitute parts for the INA303A2IPW are qualified based on strict parameter matching across the following criteria:

Electrical Parameters: Input voltage range (0V ~ 36V), operating temperature range (-40°C ~ 125°C), and current sense function with high/low-side sensing capability.

Mechanical Parameters: 14-TSSOP package configuration with 0.173" width (4.40mm), Surface Mount mounting type, and identical supplier device package specification.

Compliance & Certification: ROHS3 compliance, REACH unaffected status, MSL rating of 2 (1 Year), and EAR99 ECCN classification.

Functional Equivalence: All substitute parts perform identical current sense regulation functions within the specified voltage and temperature operating windows.

Substitutes are grouped into two base product families: INA302 series (INA302A1IPW, INA302A2IPW, INA302A3IPW) and INA303 series (INA303A1IPW), with variant designations (A1, A2, A3) indicating internal configuration differences that do not affect package compatibility or primary electrical operating parameters.

Parameter Comparison

Part Number	Manufacturer	Base Product	Function	Sensing Method	Voltage Input	Operating Temp	Package	Product Status	Inventory (Pcs)
INA303A2IPW	Texas Instruments	INA303	Current Sense	High/Low-Side	0V ~ 36V	-40°C ~ 125°C	14-TSSOP	Active	1515
INA302A2IPW	Texas Instruments	INA302	Current Sense	High/Low-Side	0V ~ 36V	-40°C ~ 125°C	14-TSSOP	Active	2572
INA302A3IPW	Texas Instruments	INA302	Current Sense	High/Low-Side	0V ~ 36V	-40°C ~ 125°C	14-TSSOP	Active	1375
INA303A1IPW	Texas Instruments	INA303	Current Sense	High/Low-Side	0V ~ 36V	-40°C ~ 125°C	14-TSSOP	Last Time Buy	1218
INA302A1IPW	Texas Instruments	INA302	Current Sense	High/Low-Side	0V ~ 36V	-40°C ~ 125°C	14-TSSOP	Last Time Buy	1234

Engineering Selection Recommendations

Active Status Parts: INA303A2IPW and INA302A2IPW, INA302A3IPW maintain Active product status with full manufacturing support and long-term availability. These parts are recommended for new designs and ongoing production requirements.

Last Time Buy Status Parts: INA303A1IPW and INA302A1IPW carry Last Time Buy designation, indicating limited future availability. These parts remain fully compliant with ROHS3 and REACH requirements but should be selected only when inventory constraints or design-specific requirements necessitate their use.

Compliance Assurance: All substitute parts maintain identical ROHS3 compliance, REACH unaffected status, and MSL 2 (1 Year) moisture sensitivity ratings, ensuring equivalent reliability and environmental compliance across all substitution scenarios.

Inventory Considerations: INA302A2IPW provides the highest current inventory level (2572 Pcs), followed by INA302A3IPW (1375 Pcs), supporting supply chain continuity for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can INA302 series parts directly replace INA303A2IPW in existing designs?

A: Yes. INA302A1IPW, INA302A2IPW, and INA302A3IPW are parametric equivalents sharing identical electrical specifications (0V ~ 36V input, -40°C ~ 125°C operating range, high/low-side sensing), mechanical packaging (14-TSSOP), and compliance certifications. Pin-level compatibility and functional equivalence are maintained across both base product families.

Q: What is the difference between A1, A2, and A3 variant designations?

A: Variant designations (A1, A2, A3) indicate internal configuration differences within the same base product family. These variants do not affect package compatibility, electrical operating parameters, or substitution eligibility. Selection between variants is determined by specific application requirements and inventory availability.

Q: Are Last Time Buy parts suitable for new production designs?

A: Last Time Buy parts (INA303A1IPW, INA302A1IPW) remain fully functional and compliant but have limited future manufacturing availability. These parts are suitable for existing production continuity but are not recommended for new design initiation. Active status parts (INA303A2IPW, INA302A2IPW, INA302A3IPW) are preferred for new designs.

Q: Do all substitute parts maintain identical moisture sensitivity and compliance ratings?

A: Yes. All substitute parts carry MSL 2 (1 Year) moisture sensitivity level, ROHS3 compliance, and REACH unaffected certification. Environmental handling, storage, and reliability characteristics are equivalent across all listed substitutes.

Q: Is the 14-TSSOP package identical across all substitute parts?

A: Yes. All substitute parts use the 14-TSSOP package with 0.173" width (4.40mm) and Surface Mount mounting type. PCB layout, footprint, and assembly processes remain unchanged across substitution scenarios.

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