PCA9615DPJ I2C ReDriver Buffer Equivalent & Substitute Parts

Part Overview

The PCA9615DPJ is a 2-channel I2C ReDriver buffer manufactured by NXP USA Inc., housed in a 10-TSSOP package. This interface IC operates at 400kHz data rate with a supply voltage range of 2.3V to 5.5V and is designed for 2-wire bus applications. The part is currently listed as obsolete, making substitute components necessary for new designs and ongoing production requirements. Active alternatives from both NXP and Analog Devices provide equivalent or enhanced functionality with improved availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9615DPJ
Manufacturer	NXP USA Inc.
Product Category	Interface - Buffer, ReDriver
Package Type	10-TSSOP (10-TFSOP, 10-MSOP, 0.118", 3.00mm Width)
Number of Channels	2
Data Rate (Max)	400kHz
Input/Output Configuration	2-Wire Bus
Supply Voltage Range	2.3V ~ 5.5V
Supply Current	16µA
Input Capacitance	7 pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Compliance	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PCA9615DPJ is determined by the following critical parameters:

Primary Compatibility Criteria:

2-channel I2C ReDriver functionality
2-wire bus input and output configuration
400kHz data rate support
Surface mount package compatibility
Supply voltage range overlap (minimum 2.3V to 5.5V support)
Operating temperature range (-40°C to 85°C preferred for industrial applications)
RoHS3 compliance and MSL Level 1 rating

Substitute Categories:

Direct Package Equivalent (10-TSSOP): PCA9615DPZ from NXP provides identical package and pinout with active product status and enhanced specifications.
Alternative Package Options (8-DFN, 8-MSOP): Analog Devices LTC4301 series offers 2-channel I2C ReDriver functionality in smaller packages with hotswap capability. These require PCB layout modifications but maintain electrical compatibility within the specified parameter ranges.

The LTC4301 variants operate at 400kHz, support 2-wire bus configuration, and maintain the required voltage and temperature ranges. The trade-off involves different package footprints and slightly higher supply current (4.5mA vs. 16µA), which must be evaluated for specific application requirements.

Parameter Comparison

Parameter	PCA9615DPJ (Main)	PCA9615DPZ	LTC4301CDD#TRPBF	LTC4301CMS8#TRPBF	LTC4301IDD#TRPBF	LTC4301IMS8#TRPBF
Manufacturer	NXP USA Inc.	NXP USA Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active	Active	Active	Active
Package Type	10-TSSOP	10-TSSOP	8-DFN (3x3)	8-MSOP	8-DFN (3x3)	8-MSOP
Number of Channels	2	2	2	2	2	2
Data Rate (Max)	400kHz	400MHz	400kHz	400kHz	400kHz	400kHz
Input/Output	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus
Supply Voltage Range	2.3V ~ 5.5V	2.3V ~ 3V, 3V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Supply Current	16µA	16µA	4.5mA	4.5mA	4.5mA	4.5mA
Input Capacitance	7 pF	6 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	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Same Package): PCA9615DPZ is the primary substitute for PCA9615DPJ. Both are NXP products in 10-TSSOP packages with identical pinout. PCA9615DPZ is active in production with significantly higher inventory availability (100,100 pcs vs. 4,277 pcs). The PCA9615DPZ offers enhanced data rate specification (400MHz vs. 400kHz) and maintains all compliance certifications (ROHS3, MSL Level 1).

For Alternative Package Implementations: LTC4301 series from Analog Devices provides functional equivalence with package options in 8-DFN (3x3) and 8-MSOP formats. Selection between variants depends on operating temperature requirements:

LTC4301CDD#TRPBF, LTC4301CMS8#TRPBF: Operating range 0°C to 70°C. Suitable for commercial temperature applications.
LTC4301IDD#TRPBF, LTC4301IMS8#TRPBF: Operating range -40°C to 85°C. Required for industrial and extended temperature applications matching the original PCA9615DPJ specification.

All LTC4301 variants include I2C hotswap capability, support 400kHz data rate, maintain 2-wire bus configuration, and comply with ROHS3 and MSL Level 1 requirements. Package selection (8-DFN vs. 8-MSOP) depends on PCB layout constraints and assembly capabilities.

Frequently Asked Questions (FAQ)

Q: Can PCA9615DPZ be used as a direct replacement for PCA9615DPJ? A: Yes. Both parts share identical 10-TSSOP package, pinout, and electrical specifications for 2-channel I2C ReDriver functionality. PCA9615DPZ is the active production equivalent with superior availability.

Q: What are the key differences between PCA9615DPZ and LTC4301 variants? A: PCA9615DPZ maintains the 10-TSSOP package and 16µA supply current. LTC4301 series uses smaller packages (8-DFN or 8-MSOP) with higher supply current (4.5mA) but adds hotswap capability. Both support 400kHz I2C operation and 2-wire bus configuration. Package selection requires PCB redesign for LTC4301 implementation.

Q: Which LTC4301 variant should be selected for industrial temperature applications? A: LTC4301IDD#TRPBF (8-DFN package) or LTC4301IMS8#TRPBF (8-MSOP package) are required for -40°C to 85°C operating range. The "I" temperature grade designation indicates industrial specification matching the original PCA9615DPJ requirement.

Q: Are all substitute parts RoHS3 compliant? A: Yes. PCA9615DPZ and all LTC4301 variants are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original part's compliance profile.

Q: What is the impact of higher supply current in LTC4301 parts? A: LTC4301 series draws 4.5mA compared to 16µA for PCA9615 parts. This 280x increase in supply current must be evaluated in power budget calculations. For battery-powered or ultra-low-power applications, PCA9615DPZ is the preferred choice.

Q: Can LTC4301 parts be used in existing PCB designs for PCA9615DPJ? A: No. LTC4301 variants use different package types (8-DFN or 8-MSOP vs. 10-TSSOP) and require PCB layout modifications. PCA9615DPZ provides true pin-compatible replacement without design changes.

Q: What packaging options are available for substitute parts? A: PCA9615DPZ is available in Cut Tape (CT) and Digi-Reel packaging. LTC4301 variants are supplied in Tube or Tape & Reel (TR) formats. Packaging selection depends on production volume and assembly line requirements.

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