PCA9515ADT I2C ReDriver Buffer Equivalent & Substitute Parts

Part Overview

The PCA9515ADT is a 2-channel I2C ReDriver buffer manufactured by Texas Instruments, designed for 2-wire bus applications with a maximum data rate of 400kHz. This device operates at supply voltages between 2.3V and 3.6V and is housed in an 8-SOIC package. The PCA9515ADT is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	PCA9515ADT
Product Status	Obsolete
Type	Buffer, ReDriver
Applications	I2C
Number of Channels	2
Data Rate (Max)	400kHz
Input/Output	2-Wire Bus
Voltage - Supply	2.3V ~ 3.6V
Current - Supply	500µA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PCA9515ADT is determined by the following critical parameters:

Primary Substitution Criteria:

2-channel I2C ReDriver functionality
400kHz maximum data rate
2-wire bus input and output
Surface mount packaging
ROHS3 compliance

Substitution Categories:

Category 1: Direct Package Equivalents (8-SOIC) Parts maintaining identical 8-SOIC packaging with matching electrical specifications allow direct board-level replacement without layout modifications.

Category 2: Package Variants (8-VSSOP, 8-TSSOP, 8-MSOP) Parts with different surface mount packages but equivalent electrical performance require PCB layout adjustment but maintain functional compatibility.

Category 3: Extended Functionality (I2C Hotswap) Analog Devices LTC4301 series parts provide I2C ReDriver functionality with additional hotswap capability and wider supply voltage range (2.7V ~ 5.5V), suitable for applications requiring enhanced features.

Category 4: Alternative Manufacturers NXP USA Inc. PCA9515AD,118 provides equivalent functionality with minor parameter variations in input capacitance and supply current.

Parameter Comparison

Part Number	Manufacturer	Package	Channels	Data Rate	Supply Voltage	Supply Current	Operating Temp	Product Status
PCA9515ADT	Texas Instruments	8-SOIC	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
PCA9515ADR	Texas Instruments	8-SOIC	2	400kHz	2.3V ~ 3.6V	500µA	-40°C ~ 85°C	Not For New Designs
PCA9515AD,118	NXP USA Inc.	8-SOIC	2	400kHz	2.3V ~ 3.6V	800µA	-40°C ~ 85°C	Active
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

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Electrical Specifications): PCA9515BDGKR is the primary active equivalent from Texas Instruments. It maintains identical electrical parameters and supply voltage range as the PCA9515ADT but uses an 8-VSSOP package instead of 8-SOIC. This part is in active production status and ROHS3 compliant.

For Same-Package Substitution: PCA9515ADR provides identical 8-SOIC packaging and electrical specifications but carries a "Not For New Designs" status. This part is suitable only for legacy system maintenance where package compatibility is critical.

For Alternative Manufacturer with Identical Package: PCA9515AD,118 from NXP USA Inc. offers 8-SOIC packaging with identical supply voltage range and operating temperature. Supply current is specified at 800µA compared to 500µA for the PCA9515ADT. This part is in active production status and ROHS3 compliant.

For Extended Operating Temperature Range: LTC4301IDD#PBF and LTC4301IDD#TRPBF from Analog Devices Inc. provide -40°C to 85°C operating temperature matching the PCA9515ADT. These parts feature 8-DFN packaging, wider supply voltage range (2.7V ~ 5.5V), and I2C hotswap capability. Both are in active production status and ROHS3 compliant.

For Compact Packaging with Extended Temperature: LTC4301IMS8#PBF from Analog Devices Inc. offers 8-MSOP packaging with -40°C to 85°C operating temperature range. This part provides the same functional performance with reduced footprint and is in active production status.

For Standard Operating Temperature Applications: LTC4301CDD#PBF, LTC4301CDD#TRPBF, LTC4301CMS8#PBF, and LTC4301CMS8#TRPBF from Analog Devices Inc. operate within 0°C to 70°C range. These parts are suitable for commercial-grade applications and are available in both 8-DFN and 8-MSOP packages in tube and tape & reel packaging options.

Frequently Asked Questions (FAQ)

Q: Can PCA9515BDGKR directly replace PCA9515ADT on existing PCBs? A: PCA9515BDGKR uses 8-VSSOP packaging while PCA9515ADT uses 8-SOIC packaging. Direct board replacement is not possible without PCB layout modification. However, electrical functionality is identical, and the footprint change is manageable in new board designs.

Q: What is the key difference between Texas Instruments PCA9515 series and Analog Devices LTC4301 series? A: The LTC4301 series provides I2C hotswap capability and operates across a wider supply voltage range (2.7V ~ 5.5V) compared to the PCA9515 series (2.3V ~ 3.6V). The LTC4301 series also draws higher supply current (4.5mA vs. 500µA). Both maintain 400kHz data rate and 2-channel I2C ReDriver functionality.

Q: Is PCA9515ADR suitable for new designs? A: PCA9515ADR carries a "Not For New Designs" status. While it provides identical electrical specifications and 8-SOIC packaging to the obsolete PCA9515ADT, PCA9515BDGKR is the recommended active alternative from Texas Instruments for new designs.

Q: What packaging options are available for I2C ReDriver substitutes? A: Substitute parts are available in 8-SOIC, 8-VSSOP, 8-TSSOP, 8-MSOP, and 8-DFN packages. Package selection depends on PCB layout constraints and thermal requirements. Smaller packages like 8-DFN and 8-MSOP offer reduced footprint but may require different assembly processes.

Q: Can LTC4301 parts operate at the same supply voltage as PCA9515ADT? A: LTC4301 parts operate within 2.7V ~ 5.5V range, which overlaps with the PCA9515ADT range of 2.3V ~ 3.6V. LTC4301 parts are compatible with PCA9515ADT supply voltages but offer extended upper voltage capability.

Q: What is the difference between tube and tape & reel packaging for the same part number? A: Tube and tape & reel packaging contain identical components with different delivery formats. Tape & reel packaging is optimized for automated assembly processes, while tube packaging is suitable for manual handling and smaller quantity orders. Electrical and functional specifications remain identical.

Q: Does operating temperature range affect I2C ReDriver functionality? A: Operating temperature range specifies the environmental conditions under which the device maintains specified electrical performance. PCA9515ADT operates -40°C to 85°C. LTC4301C series operates 0°C to 70°C, while LTC4301I series operates -40°C to 85°C. Temperature range selection depends on application environment requirements.

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