PCA9515APWR Equivalent & Substitute Parts

Part Overview

The PCA9515APWR is a 2-channel I2C buffer and redriver IC manufactured by Texas Instruments, housed in an 8-TSSOP package. This device operates at a maximum data rate of 400kHz and is designed for 2-wire bus applications with a supply voltage range of 2.3V to 3.6V. The part is marked as "Not For New Designs," indicating its obsolescence status. Finding equivalent and substitute parts is necessary for ongoing maintenance, legacy system support, and design flexibility when the primary part becomes unavailable.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	PCA9515APWR
Type	Buffer, ReDriver
Number of Channels	2
Data Rate (Max)	400kHz
Input/Output	2-Wire Bus (I2C)
Voltage - Supply	2.3V ~ 3.6V
Current - Supply	500µA
Capacitance - Input	7 pF
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Not For New Designs
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the PCA9515APWR is determined by the following critical parameters: 2-channel I2C buffer/redriver functionality, 400kHz maximum data rate, 2-wire bus input/output configuration, and surface mount packaging. Substitute parts are grouped into two categories based on electrical compatibility and packaging options.

Category 1: Texas Instruments PCA9515 Series (Direct Parametric Equivalents) These parts maintain identical electrical specifications and the same base product number (PCA9515). Substitution is valid when packaging format and product status permit.

Category 2: Analog Devices LTC4301 Series (Functional Equivalents with Extended Specifications) These parts provide 2-channel I2C buffer/redriver functionality at 400kHz with compatible 2-wire bus architecture. Extended supply voltage range (2.7V ~ 5.5V) and higher supply current (4.5mA) accommodate broader application requirements. Available in multiple package options (8-DFN, 8-MSOP) with active product status.

Parameter Comparison

Parameter	PCA9515APWR	PCA9515BDGKR	PCA9515APWT	LTC4301CDD#PBF	LTC4301CDD#TRPBF	LTC4301CMS8#PBF	LTC4301CMS8#TRPBF	LTC4301IDD#PBF	LTC4301IDD#TRPBF	LTC4301IMS8#PBF	LTC4301IMS8#TRPBF
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Type	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver
Number of Channels	2	2	2	2	2	2	2	2	2	2	2
Data Rate (Max)	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz
Input/Output	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus
Voltage - Supply	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Current - Supply	500µA	500µA	500µA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA
Capacitance - Input	7 pF	7 pF	7 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-TSSOP	8-VSSOP	8-TSSOP	8-DFN (3x3)	8-DFN (3x3)	8-MSOP	8-MSOP	8-DFN (3x3)	8-DFN (3x3)	8-MSOP	8-MSOP
Product Status	Not For New Designs	Active	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications): PCA9515BDGKR is the primary recommended substitute. It maintains identical electrical parameters and operating temperature range (-40°C ~ 85°C) as the PCA9515APWR while offering active product status. The packaging difference (8-VSSOP versus 8-TSSOP) requires PCB layout verification but provides equivalent electrical performance. This part is suitable for new production runs and ongoing support.

For Extended Supply Voltage Applications: The Analog Devices LTC4301 series (all variants) provides functional equivalence with extended supply voltage range (2.7V ~ 5.5V) compared to the PCA9515APWR (2.3V ~ 3.6V). All LTC4301 variants maintain 400kHz data rate and 2-channel I2C buffer/redriver functionality. Selection among LTC4301 variants depends on package preference and operating temperature requirements.

For Industrial Temperature Range (-40°C ~ 85°C): LTC4301IDD#PBF, LTC4301IDD#TRPBF, LTC4301IMS8#PBF, and LTC4301IMS8#TRPBF support the full industrial temperature range matching the PCA9515APWR. These parts are suitable for applications requiring extended temperature operation.

For Commercial Temperature Range (0°C ~ 70°C): LTC4301CDD#PBF, LTC4301CDD#TRPBF, LTC4301CMS8#PBF, and LTC4301CMS8#TRPBF are appropriate for applications with reduced temperature requirements. All maintain active product status and ROHS3 compliance.

Packaging Considerations: 8-TSSOP package (original): PCA9515APWR, PCA9515APWT 8-VSSOP package: PCA9515BDGKR 8-DFN (3x3) package: LTC4301 variants with "DD" designation 8-MSOP package: LTC4301 variants with "MS8" designation

All substitute parts are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance with the original part.

Frequently Asked Questions (FAQ)

Q: Can PCA9515BDGKR directly replace PCA9515APWR on existing PCBs? A: Electrical substitution is valid. However, PCA9515BDGKR uses 8-VSSOP packaging while PCA9515APWR uses 8-TSSOP. Physical footprint differences require PCB layout verification before implementation. Consult package datasheets for pin-to-pin compatibility and land pattern requirements.

Q: What is the primary difference between PCA9515 and LTC4301 series? A: Both are 2-channel I2C buffer/redriver ICs operating at 400kHz. The LTC4301 series offers extended supply voltage range (2.7V ~ 5.5V versus 2.3V ~ 3.6V) and includes hotswap capability. The PCA9515 series operates at lower supply current (500µA versus 4.5mA). Functional I2C performance is equivalent.

Q: Why does PCA9515APWR show "Not For New Designs" status? A: This designation indicates the part is in end-of-life phase. Texas Instruments recommends PCA9515BDGKR as the active alternative for new designs. Existing inventory of PCA9515APWR remains available for legacy system support.

Q: Are all LTC4301 variants interchangeable? A: LTC4301 variants differ in packaging (8-DFN or 8-MSOP), operating temperature range (0°C ~ 70°C or -40°C ~ 85°C), and tape/reel versus tube packaging. Electrical specifications remain identical across all variants. Selection depends on application temperature requirements and assembly process compatibility.

Q: What is the significance of the "#PBF" and "#TRPBF" suffixes in part numbers? A: "#PBF" indicates tube packaging. "#TRPBF" indicates tape and reel packaging. Both contain identical die and electrical specifications. Selection depends on assembly equipment and volume requirements.

Q: Can LTC4301 operate at the PCA9515APWR supply voltage of 2.3V? A: No. LTC4301 minimum supply voltage is 2.7V. Applications requiring operation below 2.7V must use PCA9515 series parts. Verify supply voltage specifications before substitution.

Q: Is PCB layout modification required when switching from 8-TSSOP to 8-DFN packaging? A: Yes. 8-TSSOP and 8-DFN packages have different physical dimensions and pin configurations. Complete PCB layout redesign is necessary. Consult package datasheets and thermal considerations, as 8-DFN includes an exposed pad for thermal management.

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