PCA9515AD,112 Equivalent & Substitute Parts

Part Overview

The PCA9515AD,112 is a 2-channel I2C buffer and redriver IC manufactured by NXP USA Inc., designed for 400kHz I2C bus applications. This component operates at supply voltages between 2.3V and 3.6V with a maximum supply current of 800µA. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The device is housed in an 8-SOIC package and is ROHS3 compliant with unlimited moisture sensitivity level rating.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9515AD,112
Manufacturer	NXP USA Inc.
Product Category	Interface - Buffer, ReDriver
Applications	I2C
Number of Channels	2
Data Rate (Max)	400kHz
Input/Output Configuration	2-Wire Bus
Voltage - Supply	2.3V ~ 3.6V
Current - Supply	800µA
Capacitance - Input	6 pF
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the PCA9515AD,112 is determined by the following critical parameters:

Functional Compatibility Requirements:

2-channel I2C buffer/redriver architecture
400kHz maximum data rate support
2-Wire Bus input and output configuration
Surface mount technology

Electrical Compatibility Parameters:

Supply voltage range must encompass or be compatible with 2.3V ~ 3.6V operation
Supply current characteristics suitable for low-power I2C applications
Input capacitance specifications compatible with I2C bus loading

Package and Thermal Considerations:

Operating temperature range must support -40°C ~ 85°C minimum
Package form factor must be compatible with PCB layout requirements
RoHS3 compliance and MSL rating must be maintained

Substitute parts are grouped into two categories: direct NXP replacements maintaining identical electrical specifications and packaging, and Analog Devices LTC4301 series alternatives offering extended supply voltage range (2.7V ~ 5.5V) with I2C hotswap capability and multiple package options (8-DFN and 8-MSOP).

Parameter Comparison

Part Number	Manufacturer	Channels	Data Rate (Max)	Supply Voltage	Supply Current	Input Capacitance	Operating Temp	Package	Product Status
PCA9515AD,112	NXP USA Inc.	2	400kHz	2.3V ~ 3.6V	800µA	6 pF	-40°C ~ 85°C	8-SOIC	Obsolete
PCA9515AD,118	NXP USA Inc.	2	400kHz	2.3V ~ 3.6V	800µA	6 pF	-40°C ~ 85°C	8-SOIC	Active
LTC4301CDD#PBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	0°C ~ 70°C	8-DFN (3x3)	Active
LTC4301CDD#TRPBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	0°C ~ 70°C	8-DFN (3x3)	Active
LTC4301CMS8#PBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	0°C ~ 70°C	8-MSOP	Active
LTC4301CMS8#TRPBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	0°C ~ 70°C	8-MSOP	Active
LTC4301IDD#PBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	-40°C ~ 85°C	8-DFN (3x3)	Active
LTC4301IDD#TRPBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	-40°C ~ 85°C	8-DFN (3x3)	Active
LTC4301IMS8#PBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	-40°C ~ 85°C	8-MSOP	Active
LTC4301IMS8#TRPBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	-40°C ~ 85°C	8-MSOP	Active
LTC4301LCDD#PBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	0°C ~ 70°C	8-DFN (3x3)	Active

Engineering Selection Recommendations

Primary Recommendation: PCA9515AD,118

The PCA9515AD,118 is the direct active replacement for the obsolete PCA9515AD,112. Both parts are manufactured by NXP USA Inc. and maintain identical electrical specifications, package form factor, and operating parameters. The only difference is product status: PCA9515AD,118 is actively produced and supported. This part is ROHS3 compliant and carries unlimited MSL rating. Selection of this part eliminates any design modifications and ensures full compatibility with existing PCB layouts and schematics.

Secondary Recommendation: LTC4301 Series (Analog Devices Inc.)

The LTC4301 series provides functional equivalence with extended capabilities. All LTC4301 variants maintain the 2-channel, 400kHz I2C buffer/redriver architecture and 2-Wire Bus configuration. Key differences include:

Extended supply voltage range (2.7V ~ 5.5V) provides broader system compatibility
I2C hotswap capability for hot-insertion applications
Multiple package options: 8-DFN (3x3) and 8-MSOP for layout flexibility
Higher supply current (4.5mA vs. 800µA) reflects enhanced functionality

Temperature-Matched Selection:

For applications requiring -40°C ~ 85°C operating range, select LTC4301IDD#PBF, LTC4301IDD#TRPBF, LTC4301IMS8#PBF, or LTC4301IMS8#TRPBF. These industrial-grade variants match the original part's thermal specifications.

For applications limited to 0°C ~ 70°C, commercial-grade LTC4301C variants (LTC4301CDD#PBF, LTC4301CDD#TRPBF, LTC4301CMS8#PBF, LTC4301CMS8#TRPBF) are suitable.

Packaging Considerations:

8-SOIC package: PCA9515AD,118 maintains original form factor
8-DFN (3x3) package: LTC4301 DFN variants offer smaller footprint
8-MSOP package: LTC4301 MSOP variants provide alternative routing options

All substitute parts are ROHS3 compliant with unlimited MSL rating, maintaining regulatory compliance with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use PCA9515AD,118 as a direct replacement for PCA9515AD,112?

A: Yes. PCA9515AD,118 is the active production equivalent of the obsolete PCA9515AD,112. Both parts share identical electrical specifications, package form factor (8-SOIC), supply voltage range (2.3V ~ 3.6V), operating temperature range (-40°C ~ 85°C), and functional architecture. No design modifications are required.

Q: What are the key differences between PCA9515AD,118 and LTC4301 series parts?

A: The primary differences are manufacturer (NXP vs. Analog Devices), supply voltage range (2.3V ~ 3.6V vs. 2.7V ~ 5.5V), supply current (800µA vs. 4.5mA), and available packages. LTC4301 parts add I2C hotswap capability. Both maintain 2-channel, 400kHz I2C buffer/redriver functionality and 2-Wire Bus configuration. Electrical compatibility exists within the overlapping supply voltage range (2.7V ~ 3.6V).

Q: Which LTC4301 variant should I select for my application?

A: Selection depends on three factors: (1) Operating temperature requirement: choose LTC4301I series for -40°C ~ 85°C or LTC4301C series for 0°C ~ 70°C; (2) Package preference: choose DFN for compact layouts or MSOP for alternative routing; (3) Packaging format: choose #PBF for tube packaging or #TRPBF for tape and reel.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts—PCA9515AD,118 and all LTC4301 variants—are ROHS3 compliant with unlimited MSL rating, maintaining regulatory compliance with the original PCA9515AD,112.

Q: Can I use LTC4301 parts in a design originally specified for PCA9515AD,112?

A: LTC4301 parts are functionally compatible within the overlapping supply voltage range (2.7V ~ 3.6V). However, design review is required if your system operates below 2.7V or above 3.6V, as LTC4301 parts specify 2.7V ~ 5.5V operation. Package changes (from 8-SOIC to 8-DFN or 8-MSOP) require PCB layout modifications. Thermal specifications differ for commercial-grade LTC4301C variants (0°C ~ 70°C vs. -40°C ~ 85°C).

Q: What is the difference between #PBF and #TRPBF packaging designations?

A: #PBF indicates tube packaging, suitable for lower-volume applications and manual assembly. #TRPBF indicates tape and reel packaging, optimized for high-volume automated assembly. Both formats contain identical components; the difference is packaging and handling method only.

Q: Why does LTC4301 have higher supply current (4.5mA) than PCA9515AD,112 (800µA)?

A: The LTC4301 series includes integrated I2C hotswap functionality and extended supply voltage range capability, which require additional circuitry and consume more power. For applications where low power consumption is critical and hotswap capability is not required, PCA9515AD,118 remains the optimal choice.

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