PCA9515D,112 I2C ReDriver Buffer Equivalent & Substitute Parts

Part Overview

The PCA9515D,112 is a 2-channel I2C ReDriver buffer manufactured by NXP USA Inc., designed for 400kHz I2C bus applications. This part operates at 3V to 3.6V supply voltage with a maximum supply current of 2.3mA and is housed in an 8-SOIC package. The device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across I2C signaling, channel count, data rate, and mounting characteristics while accommodating variations in supply voltage ranges, operating temperature specifications, and package formats.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9515D,112
Manufacturer	NXP USA Inc.
Category	Interface
Type	Buffer, ReDriver
Applications	I2C
Number of Channels	2
Data Rate (Max)	400kHz
Input/Output	2-Wire Bus
Voltage - Supply	3V ~ 3.6V
Current - Supply	2.3mA
Capacitance - Input	6 pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PCA9515D,112 is determined by the following critical parameters:

Functional Requirements:

2-channel I2C ReDriver buffer architecture
400kHz maximum data rate capability
2-Wire Bus input and output configuration

Electrical Compatibility:

Supply voltage range must encompass or exceed the original 3V to 3.6V specification
Operating temperature range must support -40°C to 85°C minimum
Input capacitance and current consumption characteristics must be compatible with I2C bus loading

Physical Compatibility:

Surface mount technology required
Package format must be compatible with PCB layout (8-SOIC, 8-DFN, or 8-MSOP acceptable)

Regulatory Compliance:

ROHS3 compliance required
REACH unaffected status required

Substitute parts are grouped into two categories: direct NXP alternatives (PCA9515AD,118) and cross-manufacturer Analog Devices LTC4301 series parts offering extended supply voltage ranges and enhanced I2C hotswap functionality. All substitutes maintain the core 2-channel, 400kHz I2C ReDriver specification while offering variations in package format, supply current efficiency, and temperature rating options.

Parameter Comparison

Parameter	PCA9515D,112	PCA9515AD,118	LTC4301CDD#PBF	LTC4301CDD#TRPBF	LTC4301CMS8#PBF	LTC4301CMS8#TRPBF	LTC4301IDD#PBF	LTC4301IDD#TRPBF	LTC4301IMS8#PBF	LTC4301IMS8#TRPBF	LTC4301LCDD#PBF
Manufacturer	NXP USA Inc.	NXP USA Inc.	Analog Devices Inc.	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
Applications	I2C	I2C	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap
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	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	2.7V ~ 5.5V
Current - Supply	2.3mA	800µA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA
Capacitance - Input	6 pF	6 pF	10 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	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	0°C ~ 70°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC	8-SOIC	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-WFDFN Exposed Pad
Product Status	Obsolete	Active	Active	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
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct NXP Substitute (Recommended for Pin-Compatible Replacement):

PCA9515AD,118 is the active-status direct substitute from NXP USA Inc. It maintains the 8-SOIC package format, identical pin configuration, and -40°C to 85°C operating temperature range. The supply voltage range extends to 2.3V minimum, providing broader compatibility. Supply current is reduced to 800µA, offering improved power efficiency. This part is suitable for direct PCB layout reuse with no design modifications required.

Analog Devices LTC4301 Series (Extended Functionality and Supply Range):

The LTC4301 series from Analog Devices Inc. provides active-status alternatives with extended supply voltage range (2.7V to 5.5V), enabling use in mixed-voltage systems. These parts incorporate I2C hotswap functionality beyond basic ReDriver operation. Package options include 8-DFN (3x3) and 8-MSOP formats, requiring PCB layout redesign. Temperature-rated variants are available: LTC4301C series (0°C to 70°C) and LTC4301I series (-40°C to 85°C). All LTC4301 variants maintain ROHS3 compliance and MSL 1 rating.

Selection Criteria by Application:

For direct replacement in existing designs: PCA9515AD,118
For new designs requiring extended supply voltage: LTC4301IDD#TRPBF or LTC4301IMS8#TRPBF (industrial temperature range, tape & reel packaging)
For commercial temperature applications: LTC4301CDD#TRPBF or LTC4301CMS8#TRPBF
For space-constrained layouts: LTC4301 8-DFN package variants
For standard PCB assembly: LTC4301 8-MSOP package variants

All recommended substitutes are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the original PCA9515D,112.

Frequently Asked Questions (FAQ)

Q: Can PCA9515AD,118 be used as a direct drop-in replacement for PCA9515D,112?

A: Yes. PCA9515AD,118 maintains identical pinout, 8-SOIC package format, and -40°C to 85°C operating temperature range. The extended lower supply voltage limit (2.3V vs. 3V) and reduced supply current (800µA vs. 2.3mA) are backward-compatible improvements. No PCB modifications are required.

Q: What is the primary difference between NXP PCA9515 and Analog Devices LTC4301 substitutes?

A: The LTC4301 series extends supply voltage range to 2.7V–5.5V and adds I2C hotswap capability. LTC4301 parts require PCB layout redesign due to different package formats (8-DFN or 8-MSOP vs. 8-SOIC). LTC4301 supply current is higher (4.5mA) but operates across broader voltage and temperature ranges.

Q: Which LTC4301 variant should be selected for industrial applications requiring -40°C to 85°C operation?

A: LTC4301I series (LTC4301IDD#TRPBF, LTC4301IMS8#TRPBF, LTC4301IMS8#PBF) supports -40°C to 85°C operating temperature. The #TRPBF suffix indicates tape & reel packaging for automated assembly; #PBF indicates tube packaging.

Q: Are package format changes between 8-SOIC, 8-DFN, and 8-MSOP compatible on the same PCB?

A: No. Each package format requires distinct PCB footprints and layout considerations. 8-SOIC and 8-MSOP are gull-wing lead packages; 8-DFN is a land-grid array format with exposed thermal pad. PCB redesign is necessary when changing package types.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. All listed substitutes (PCA9515AD,118 and all LTC4301 variants) are ROHS3 compliant and REACH unaffected, matching the regulatory status of PCA9515D,112.

Q: What is the significance of the #TRPBF and #PBF packaging suffixes?

A: #TRPBF indicates tape & reel packaging, optimized for high-volume automated assembly. #PBF indicates tube packaging, suitable for lower-volume or manual assembly processes. Electrical specifications are identical; packaging choice depends on production volume and assembly equipment.

Q: Can LTC4301 parts operate at the original 3V–3.6V supply voltage range?

A: Yes. The LTC4301 supply range (2.7V–5.5V) encompasses the original 3V–3.6V specification. LTC4301 parts are fully compatible with existing power supply designs operating within this voltage window.

Q: What is the impact of increased input capacitance (10 pF vs. 6 pF) in LTC4301 substitutes?

A: The 10 pF input capacitance in LTC4301 parts remains within standard I2C bus loading specifications. This parameter does not restrict substitution for 400kHz I2C applications. Bus termination and trace routing practices should follow standard I2C design guidelines regardless of substitute selection.

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