PCA9515AP I2C ReDriver Buffer Equivalent & Substitute Parts

Part Overview

The PCA9515AP is a 2-channel I2C ReDriver buffer manufactured by Texas Instruments, designed for 400kHz I2C bus applications. This device operates as a Through Hole 8-DIP package and is classified as Obsolete. Due to its obsolete status and limited availability in modern manufacturing environments, equivalent substitute parts from active product lines are necessary for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9515AP
Manufacturer	Texas Instruments
Product Category	Interface - Buffer, ReDriver
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
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Capacitance - Input	7 pF
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the PCA9515AP is determined by the following critical parameters:

Functional Equivalence: 2-channel I2C ReDriver buffer with 400kHz maximum data rate
Bus Interface: 2-Wire Bus input and output configuration
Supply Voltage Compatibility: Substitute parts must support the operating voltage range or be compatible through design accommodation
Channel Count: Minimum 2 channels required
Data Rate: 400kHz operation capability
Compliance: ROHS3 compliance and EAR99 classification maintained across all substitutes

The substitute parts listed are organized by manufacturer (Analog Devices Inc., LTC4301 series) and package type (8-DFN, 8-MSOP). All substitutes maintain functional equivalence in I2C ReDriver operation while offering active product status and improved availability.

Parameter Comparison

Parameter	PCA9515AP	LTC4301CDD#PBF	LTC4301CDD#TRPBF	LTC4301CMS8#PBF	LTC4301CMS8#TRPBF	LTC4301IDD#PBF	LTC4301IDD#TRPBF	LTC4301IMS8#PBF	LTC4301IMS8#TRPBF	LTC4301LCDD#PBF	LTC4301LCDD#TRPBF
Manufacturer	Texas Instruments	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.	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 - Hotswap	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	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	2.7V ~ 5.5V
Current - Supply	500µA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA
Operating Temperature	-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	0°C ~ 70°C
Mounting Type	Through Hole	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-DIP (0.300", 7.62mm)	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	8-WFDFN Exposed Pad
Capacitance - Input	7 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All LTC4301 series substitutes maintain ROHS3 compliance and EAR99 classification, ensuring regulatory alignment with the original PCA9515AP. The substitute parts are classified as Active products, providing long-term availability and manufacturing support.

Temperature Range Considerations: The PCA9515AP operates across -40°C to 85°C. Substitutes LTC4301IDD#PBF, LTC4301IDD#TRPBF, LTC4301IMS8#PBF, and LTC4301IMS8#TRPBF maintain this extended temperature range. Substitutes with 0°C to 70°C operating temperature (LTC4301CDD#PBF, LTC4301CDD#TRPBF, LTC4301CMS8#PBF, LTC4301CMS8#TRPBF, LTC4301LCDD#PBF, LTC4301LCDD#TRPBF) are suitable for commercial temperature applications only.

Supply Voltage: LTC4301 substitutes operate at 2.7V to 5.5V, which encompasses the PCA9515AP range of 2.3V to 3.6V. This wider voltage tolerance provides design flexibility.

Packaging and Mounting: The original PCA9515AP uses Through Hole 8-DIP mounting. All substitutes are Surface Mount devices available in 8-DFN (3x3) or 8-MSOP packages. Design migration from Through Hole to Surface Mount requires PCB layout modification.

Supply Current: LTC4301 substitutes draw 4.5mA compared to the PCA9515AP's 500µA. Power budget analysis is required for battery-powered or low-power applications.

Frequently Asked Questions (FAQ)

Q: Can LTC4301 series parts directly replace PCA9515AP in existing Through Hole designs?

A: No. The PCA9515AP uses 8-DIP Through Hole packaging while all LTC4301 substitutes are Surface Mount (8-DFN or 8-MSOP). PCB redesign is necessary. Alternatively, adapter boards or sockets may be used for prototyping.

Q: What is the functional difference between 8-DFN and 8-MSOP package options?

A: Both 8-DFN (3x3) and 8-MSOP packages provide identical electrical functionality for I2C ReDriver operation. Package selection depends on PCB layout constraints and manufacturing capabilities. 8-DFN offers smaller footprint; 8-MSOP provides wider lead pitch.

Q: Are there temperature-related restrictions when substituting PCA9515AP?

A: Yes. For applications requiring -40°C to 85°C operation, use LTC4301IDD#PBF, LTC4301IDD#TRPBF, LTC4301IMS8#PBF, or LTC4301IMS8#TRPBF. Other LTC4301 variants operate only to 0°C to 70°C and are unsuitable for extended temperature applications.

Q: Does the higher supply current of LTC4301 (4.5mA vs 500µA) affect circuit design?

A: Yes. The 9x increase in supply current requires power supply capacity review. For battery-powered systems or low-power designs, this difference is significant and must be evaluated against power budget constraints.

Q: What is the significance of "Hotswap" designation in LTC4301 applications?

A: The LTC4301 series supports I2C Hotswap functionality, enabling safe connection and disconnection of I2C devices during operation. The PCA9515AP does not specify this capability. This is an enhanced feature that does not affect basic I2C ReDriver compatibility.

Q: Are packaging options (Tube vs. Tape & Reel) functionally equivalent?

A: Yes. Tube and Tape & Reel packaging contain identical parts. Packaging selection is based on manufacturing and assembly requirements. Tape & Reel is standard for automated assembly; Tube packaging is used for manual assembly or lower-volume applications.

Q: What compliance certifications apply to all substitute parts?

A: All LTC4301 substitutes maintain ROHS3 compliance and EAR99 classification, matching the original PCA9515AP. REACH status is Unaffected across all parts.

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