PCA9515APW Equivalent & Substitute Parts

Part Overview

The PCA9515APW is a 2-channel I2C buffer and redriver IC manufactured by Texas Instruments, housed in an 8-TSSOP package. This interface 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 functionally equivalent alternatives for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Interface - Buffer, ReDriver
Applications	I2C
Number of Channels	2
Data Rate (Max)	400kHz
Input/Output	2-Wire Bus
Voltage Supply Range	2.3V ~ 3.6V
Supply Current	500µA
Input Capacitance	7 pF
Operating Temperature	-40°C ~ 85°C
Package Type	8-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PCA9515APW is determined by the following critical parameters:

Electrical Compatibility Requirements:

2-channel I2C buffer/redriver functionality
400kHz maximum data rate support
2-wire bus input and output configuration
Operating temperature range of -40°C to 85°C (extended industrial range)
Supply voltage compatibility with 2.3V ~ 3.6V range

Mechanical Compatibility Requirements:

Surface mount technology
Package footprint compatibility (8-TSSOP or equivalent pinout)

Regulatory Compliance:

ROHS3 compliance
Active product status preferred for new designs

Substitute parts are grouped into two categories: direct Texas Instruments alternatives with identical electrical specifications and packaging, and Analog Devices LTC4301 series parts that provide equivalent I2C buffer functionality with extended supply voltage range (2.7V ~ 5.5V) and enhanced hotswap capabilities.

Parameter Comparison

Part Number	Manufacturer	Package	Channels	Data Rate	Supply Voltage	Supply Current	Temp Range	Product Status
PCA9515APW	Texas Instruments	8-TSSOP	2	400kHz	2.3V ~ 3.6V	500µA	-40°C ~ 85°C	Obsolete
PCA9515BDGKR	Texas Instruments	8-VSSOP	2	400kHz	2.3V ~ 3.6V	500µA	-40°C ~ 85°C	Active
PCA9515APWR	Texas Instruments	8-TSSOP	2	400kHz	2.3V ~ 3.6V	500µA	-40°C ~ 85°C	Not For New Designs
LTC4301CDD#PBF	Analog Devices Inc.	8-DFN (3x3)	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	Active
LTC4301CDD#TRPBF	Analog Devices Inc.	8-DFN (3x3)	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	Active
LTC4301CMS8#PBF	Analog Devices Inc.	8-MSOP	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	Active
LTC4301CMS8#TRPBF	Analog Devices Inc.	8-MSOP	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	Active
LTC4301IDD#PBF	Analog Devices Inc.	8-DFN (3x3)	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	Active
LTC4301IDD#TRPBF	Analog Devices Inc.	8-DFN (3x3)	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	Active
LTC4301IMS8#PBF	Analog Devices Inc.	8-MSOP	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	Active
LTC4301IMS8#TRPBF	Analog Devices Inc.	8-MSOP	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	Active

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement: PCA9515BDGKR is the active equivalent from Texas Instruments. It maintains identical electrical specifications (2.3V ~ 3.6V supply, 500µA current, -40°C ~ 85°C operating range) and the same 2-channel 400kHz I2C buffer functionality. The package differs (8-VSSOP versus 8-TSSOP), requiring PCB layout verification for pin compatibility.

Alternative for Extended Temperature Range: LTC4301IDD#TRPBF or LTC4301IMS8#TRPBF from Analog Devices provide active product status with extended operating temperature range (-40°C ~ 85°C) matching the original specification. These parts support wider supply voltage (2.7V ~ 5.5V) and include I2C hotswap functionality. Package options include 8-DFN (3x3) and 8-MSOP formats.

For Commercial Temperature Applications: LTC4301CDD#TRPBF or LTC4301CMS8#TRPBF are suitable for designs with 0°C ~ 70°C operating requirements. These maintain active product status and equivalent I2C buffer performance with the same 400kHz data rate.

All recommended substitutes carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, matching the original part's regulatory status.

Frequently Asked Questions (FAQ)

Q: Can PCA9515BDGKR directly replace PCA9515APW without PCB modifications? A: Both parts share identical electrical specifications and 2-channel I2C buffer functionality at 400kHz. However, PCA9515BDGKR uses 8-VSSOP packaging while PCA9515APW uses 8-TSSOP. Pin compatibility must be verified against your PCB layout, as package footprints differ.

Q: What is the key difference between Texas Instruments PCA9515 and Analog Devices LTC4301 series? A: Both provide 2-channel I2C buffer functionality at 400kHz. The LTC4301 series supports extended supply voltage (2.7V ~ 5.5V versus 2.3V ~ 3.6V) and includes I2C hotswap capabilities. LTC4301 draws higher supply current (4.5mA versus 500µA). Package options differ: PCA9515 uses TSSOP/VSSOP while LTC4301 offers DFN and MSOP variants.

Q: Which substitute maintains the exact operating temperature range of -40°C to 85°C? A: PCA9515BDGKR (Texas Instruments) and LTC4301IDD#TRPBF, LTC4301IMS8#TRPBF (Analog Devices) all support -40°C ~ 85°C operation. LTC4301CDD#TRPBF and LTC4301CMS8#TRPBF are limited to 0°C ~ 70°C.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, matching the original PCA9515APW specifications.

Q: What packaging options are available for I2C buffer substitutes? A: Texas Instruments PCA9515 series uses 8-TSSOP or 8-VSSOP packages. Analog Devices LTC4301 series offers 8-DFN (3x3) and 8-MSOP packages. Package selection depends on PCB layout constraints and thermal requirements.

Q: Can LTC4301 parts be used in applications requiring the exact 2.3V ~ 3.6V supply range? A: LTC4301 series supports 2.7V ~ 5.5V supply voltage, which overlaps with the PCA9515APW range (2.3V ~ 3.6V) starting at 2.7V. Applications requiring operation below 2.7V require the PCA9515 series.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message