PCA9515AD/G-T I2C Bus Repeater Equivalent & Substitute Parts

Part Overview

The PCA9515AD/G-T is an I2C bus repeater interface component manufactured by NXP USA Inc., currently classified as obsolete. This 8-pin SOIC package device functions as a buffer and redriver for I2C 2-channel applications operating at 400kHz. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for new designs and ongoing production requirements. Suitable alternatives maintain functional compatibility through matching electrical specifications and package form factors while offering active product support and extended availability.

Key Parameters

Parameter	PCA9515AD/G-T
Manufacturer	NXP USA Inc.
Product Status	Obsolete
Category	Interface
Type	Buffer, ReDriver
Applications	I2C
Number of Channels	2
Data Rate (Max)	400kHz
Input/Output	2-Wire Bus
Voltage - Supply	2.3V ~ 3.6V
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9515AD/G-T is determined by the following critical parameters:

Primary Compatibility Criteria:

2-channel I2C buffer/redriver functionality
400kHz maximum data rate
2-Wire Bus input and output configuration
Surface mount technology
ROHS3 compliance and REACH unaffected status
MSL 1 rating

Package Compatibility Groups:

8-SOIC direct package match: PCA9515AD,118
8-MSOP/8-TSSOP alternative packages: LTC4301CMS8#TRPBF, LTC4301CMS8#PBF, LTC4301IMS8#PBF, LTC4301IMS8#TRPBF, LTC4301LCMS8#PBF
8-DFN alternative packages: LTC4301CDD#PBF, LTC4301IDD#PBF, LTC4301LIDD#PBF
8-VSSOP alternative packages: PCA9515BDGKR

Substitutes are grouped by package type and operating temperature range. All listed alternatives maintain the core 2-channel, 400kHz I2C redriver functionality with equivalent electrical performance within their specified supply voltage and temperature operating ranges.

Parameter Comparison

Parameter	PCA9515AD/G-T	PCA9515AD,118	LTC4301CMS8#TRPBF	LTC4301CDD#PBF	PCA9515BDGKR
Manufacturer	NXP USA Inc.	NXP USA Inc.	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active
Type	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver
Applications	I2C	I2C	I2C - Hotswap	I2C - Hotswap	I2C
Number of Channels	2	2	2	2	2
Data Rate (Max)	400kHz	400kHz	400kHz	400kHz	400kHz
Input/Output	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus
Voltage - Supply	2.3V ~ 3.6V	2.3V ~ 3.6V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.3V ~ 3.6V
Current - Supply	800µA	800µA	4.5mA	4.5mA	500µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC	8-SOIC	8-MSOP	8-DFN (3x3)	8-VSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Direct Package Replacement (8-SOIC): PCA9515AD,118 from NXP USA Inc. is the primary substitute, maintaining identical package geometry, supply voltage range (2.3V ~ 3.6V), and operating temperature (-40°C ~ 85°C). This part is active and provides the most straightforward board-level compatibility without layout modifications.

Alternative Package Options: When board redesign is acceptable, LTC4301 series parts from Analog Devices Inc. offer active product status with extended supply voltage range (2.7V ~ 5.5V). Available in 8-MSOP, 8-DFN, and 8-TSSOP packages. Temperature-rated variants include standard (0°C ~ 70°C) and industrial (-40°C ~ 85°C) grades. Higher supply current (4.5mA) versus original specification (800µA) must be evaluated for power budget impact.

Texas Instruments Alternative: PCA9515BDGKR in 8-VSSOP package maintains NXP PCA9515 base product compatibility with reduced supply current (500µA) and full industrial temperature range (-40°C ~ 85°C). Suitable for space-constrained applications.

Selection Criteria:

Existing 8-SOIC PCB layout: Select PCA9515AD,118
New designs with thermal headroom: LTC4301 series variants
Space-constrained designs: PCA9515BDGKR (8-VSSOP)
Extended temperature requirement (-40°C ~ 85°C): PCA9515AD,118, PCA9515BDGKR, or LTC4301IDD#PBF, LTC4301IMS8#PBF, LTC4301IMS8#TRPBF, LTC4301LIDD#PBF

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can I use LTC4301 series parts as direct replacements for PCA9515AD/G-T? A: LTC4301 parts are functionally equivalent for I2C 2-channel 400kHz redriver applications but require PCB layout modification due to different package types (8-MSOP, 8-DFN, 8-TSSOP versus 8-SOIC). Electrical specifications differ in supply voltage range (2.7V ~ 5.5V versus 2.3V ~ 3.6V) and supply current (4.5mA versus 800µA). Temperature-rated variants (-40°C ~ 85°C or 0°C ~ 70°C) must match application requirements.

Q: What is the difference between LTC4301CMS8#TRPBF and LTC4301CMS8#PBF? A: Both parts are identical in electrical specifications and package type (8-MSOP). The difference is packaging format: #TRPBF indicates Tape & Reel packaging, while #PBF indicates Tube packaging. Selection depends on assembly process requirements and quantity needs.

Q: Is PCA9515BDGKR compatible with existing PCA9515AD/G-T designs? A: PCA9515BDGKR maintains functional I2C redriver compatibility and identical supply voltage range (2.3V ~ 3.6V). However, the 8-VSSOP package differs from 8-SOIC, requiring PCB layout changes. Supply current is lower (500µA versus 800µA), which is beneficial for power-constrained applications.

Q: Why do some substitutes have higher supply current ratings? A: LTC4301 series parts from Analog Devices Inc. specify 4.5mA supply current compared to 800µA for NXP parts. This reflects different internal circuit design and hotswap capability. Applications must verify power budget compatibility before selection.

Q: Are all listed substitutes ROHS3 compliant? A: Yes. All substitute parts listed maintain ROHS3 compliance, MSL 1 (Unlimited) rating, and REACH unaffected status, matching the original PCA9515AD/G-T environmental certifications.

Q: What operating temperature range should I select? A: PCA9515AD,118 and PCA9515BDGKR support -40°C ~ 85°C industrial range. LTC4301 variants are available in both 0°C ~ 70°C commercial and -40°C ~ 85°C industrial grades. Select based on application environment requirements.

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