PCA9515APWT Equivalent & Substitute Parts

Part Overview

The PCA9515APWT is a 2-channel I2C buffer and redriver IC manufactured by Texas Instruments, housed in an 8-TSSOP package. This component operates at a maximum data rate of 400kHz and is designed for 2-wire bus applications. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Base Product Number	PCA9515
Type	Buffer, ReDriver
Applications	I2C
Number of Channels	2
Data Rate (Max)	400kHz
Input/Output	2-Wire Bus
Voltage Supply Range	2.3V ~ 3.6V
Current Supply	500µA
Operating Temperature	-40°C ~ 85°C
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the PCA9515APWT is determined by the following critical parameters: 2-channel configuration, 400kHz maximum data rate, 2-wire bus I2C interface, and surface mount packaging. Equivalent parts must maintain these core functional specifications.

Substitutes are grouped into two categories:

Texas Instruments PCA9515 Series (Direct Equivalents): Parts sharing the same base product number (PCA9515) with identical electrical specifications and compatible packaging. These include PCA9515BDGKR (active status, 8-VSSOP package) and PCA9515APWR (not for new designs, 8-TSSOP package).

Analog Devices LTC4301 Series (Functional Equivalents): Parts from Analog Devices that maintain the same 2-channel, 400kHz I2C redriver functionality with compatible bus interface. These parts feature enhanced supply voltage range (2.7V ~ 5.5V) and extended temperature support in certain variants, with different package options (8-DFN, 8-MSOP).

Parameter Comparison

Part Number	Manufacturer	Product Status	Channels	Data Rate	Voltage Supply	Current Supply	Operating Temp	Package	Packaging Type
PCA9515APWT	Texas Instruments	Obsolete	2	400kHz	2.3V ~ 3.6V	500µA	-40°C ~ 85°C	8-TSSOP	Tape & Reel
PCA9515BDGKR	Texas Instruments	Active	2	400kHz	2.3V ~ 3.6V	500µA	-40°C ~ 85°C	8-VSSOP	Cut Tape & Digi-Reel
PCA9515APWR	Texas Instruments	Not For New Designs	2	400kHz	2.3V ~ 3.6V	500µA	-40°C ~ 85°C	8-TSSOP	Tape & Reel
LTC4301CDD#PBF	Analog Devices Inc.	Active	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	8-DFN (3x3)	Tube
LTC4301CDD#TRPBF	Analog Devices Inc.	Active	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	8-DFN (3x3)	Tape & Reel
LTC4301CMS8#PBF	Analog Devices Inc.	Active	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	8-MSOP	Tube
LTC4301CMS8#TRPBF	Analog Devices Inc.	Active	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	8-MSOP	Tape & Reel
LTC4301IDD#PBF	Analog Devices Inc.	Active	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	8-DFN (3x3)	Tube
LTC4301IDD#TRPBF	Analog Devices Inc.	Active	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	8-DFN (3x3)	Tape & Reel
LTC4301IMS8#PBF	Analog Devices Inc.	Active	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	8-MSOP	Tube

Engineering Selection Recommendations

For applications currently using PCA9515APWT, the PCA9515BDGKR represents the primary substitute path. This part maintains identical electrical specifications and operating parameters while offering active product status and improved availability. The 8-VSSOP package is mechanically compatible with standard surface mount assembly processes.

For new designs, PCA9515BDGKR is the recommended selection due to its active status and continued manufacturer support. This part is ROHS3 compliant and maintains the same supply voltage range and operating temperature specifications as the original PCA9515APWT.

Analog Devices LTC4301 series components provide functional equivalence with extended supply voltage range (2.7V ~ 5.5V versus 2.3V ~ 3.6V). The LTC4301IDD#TRPBF and LTC4301IMS8#PBF variants support the full -40°C ~ 85°C operating temperature range, matching the original part's thermal specifications. These alternatives are suitable for applications requiring broader voltage tolerance or different package geometries. All LTC4301 variants are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can PCA9515BDGKR directly replace PCA9515APWT in existing designs?

A: Yes. Both parts maintain identical electrical specifications: 2-channel configuration, 400kHz data rate, 2.3V ~ 3.6V supply voltage, 500µA supply current, and -40°C ~ 85°C operating temperature. The primary difference is package geometry (8-VSSOP versus 8-TSSOP), which requires PCB layout adjustment but maintains functional compatibility.

Q: What are the key differences between Texas Instruments PCA9515 and Analog Devices LTC4301 parts?

A: Both maintain 2-channel, 400kHz I2C redriver functionality. LTC4301 parts feature extended supply voltage range (2.7V ~ 5.5V) and higher supply current (4.5mA versus 500µA). Standard LTC4301C variants operate at 0°C ~ 70°C, while LTC4301I variants support -40°C ~ 85°C. Package options differ: LTC4301 offers 8-DFN and 8-MSOP, while PCA9515 uses 8-TSSOP and 8-VSSOP.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Q: What packaging options are available for substitutes?

A: Texas Instruments PCA9515BDGKR uses 8-VSSOP. Analog Devices LTC4301 series offers 8-DFN (3x3) and 8-MSOP packages. Packaging selection depends on PCB layout constraints and assembly capabilities.

Q: Which substitute is recommended for temperature-critical applications?

A: For applications requiring -40°C ~ 85°C operation, select PCA9515BDGKR (Texas Instruments) or LTC4301I variants (Analog Devices). Standard LTC4301C parts operate only to 70°C maximum.

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