PI6ULS5V9515AWEX Equivalent & Substitute Parts

Part Overview

The PI6ULS5V9515AWEX is a Buffer/ReDriver interface component manufactured by Diodes Incorporated, designed for I2C bus applications with 2-channel 400kHz operation in an 8-SOIC package. This part is classified as Obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The component provides signal conditioning and level shifting for 2-wire I2C bus architectures operating at supply voltages between 2.3V and 3.6V.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI6ULS5V9515AWEX
Manufacturer	Diodes Incorporated
Product 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	1.7mA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the PI6ULS5V9515AWEX is determined by the following critical parameters:

Functional Type: Buffer/ReDriver for I2C applications
Channel Count: 2 channels minimum
Data Rate: 400kHz operation
Bus Interface: 2-Wire I2C bus input and output
Supply Voltage Range: Compatibility with 2.3V ~ 3.6V (or broader range)
Package Compatibility: Surface mount packages suitable for 8-pin configurations
Compliance: ROHS3 compliance and EAR99 classification

Substitute parts are grouped into two categories:

Category 1 - Direct Parametric Equivalents (Same Package Family) Parts maintaining 8-SOIC or equivalent 8-pin surface mount packages with matching electrical specifications.

Category 2 - Functional Equivalents (Alternative Packages) Parts with identical electrical performance but different package types (8-DFN, 8-MSOP), suitable for designs with package flexibility.

Parameter Comparison

Part Number	Manufacturer	Type	Channels	Data Rate	Supply Voltage	Supply Current	Operating Temp	Package	Status
PI6ULS5V9515AWEX	Diodes Inc.	Buffer, ReDriver	2	400kHz	2.3V ~ 3.6V	1.7mA	-40°C ~ 85°C	8-SOIC	Obsolete
PCA9515AD,118	NXP USA Inc.	Buffer, ReDriver	2	400kHz	2.3V ~ 3.6V	800µA	-40°C ~ 85°C	8-SOIC	Active
LTC4301CDD#PBF	Analog Devices Inc.	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	8-DFN (3x3)	Active
LTC4301CDD#TRPBF	Analog Devices Inc.	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	8-DFN (3x3)	Active
LTC4301CMS8#PBF	Analog Devices Inc.	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	8-MSOP	Active
LTC4301CMS8#TRPBF	Analog Devices Inc.	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	0°C ~ 70°C	8-MSOP	Active
LTC4301IDD#PBF	Analog Devices Inc.	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	8-DFN (3x3)	Active
LTC4301IDD#TRPBF	Analog Devices Inc.	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	8-DFN (3x3)	Active
LTC4301IMS8#PBF	Analog Devices Inc.	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	8-MSOP	Active
LTC4301IMS8#TRPBF	Analog Devices Inc.	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	-40°C ~ 85°C	8-MSOP	Active

Engineering Selection Recommendations

Primary Recommendation: PCA9515AD,118 (NXP USA Inc.)

The PCA9515AD,118 is the most direct substitute for the PI6ULS5V9515AWEX. Both parts maintain identical electrical specifications (2.3V ~ 3.6V supply, 400kHz data rate, 2-channel I2C ReDriver functionality) and share the same 8-SOIC package footprint. The PCA9515AD,118 is in Active product status with ROHS3 compliance and EAR99 classification, ensuring long-term availability and regulatory compliance. Supply current is lower at 800µA compared to 1.7mA, providing improved power efficiency. This part is suitable for direct PCB layout replacement without design modifications.

Secondary Recommendation: LTC4301 Series (Analog Devices Inc.)

The LTC4301 family offers multiple package options (8-DFN, 8-MSOP) with extended supply voltage range (2.7V ~ 5.5V) and Active product status. The LTC4301IDD#TRPBF and LTC4301IMS8#TRPBF variants support the full -40°C ~ 85°C operating temperature range matching the original part. These alternatives are suitable when package flexibility is available or when extended voltage range is beneficial. The LTC4301 series includes I2C hotswap functionality, providing additional circuit protection capabilities.

Compliance Verification

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 (Unlimited), and EAR99 classification, ensuring regulatory alignment with the original PI6ULS5V9515AWEX specification.

Frequently Asked Questions (FAQ)

Q: Can I use PCA9515AD,118 as a direct replacement for PI6ULS5V9515AWEX?

A: Yes. Both parts share identical electrical specifications for I2C ReDriver functionality, 400kHz data rate, 2-channel operation, and 8-SOIC package dimensions. PCB layout and schematic connections remain unchanged. The lower supply current of PCA9515AD,118 (800µA vs 1.7mA) is a beneficial characteristic.

Q: What is the difference between the LTC4301 package variants (DFN vs MSOP)?

A: The LTC4301CDD#TRPBF uses an 8-DFN (3x3) package with exposed pad, while LTC4301CMS8#TRPBF uses an 8-MSOP package. Both maintain identical electrical performance and 400kHz I2C operation. Package selection depends on PCB layout constraints and thermal management requirements. The DFN package offers smaller footprint; MSOP offers standard lead-based soldering.

Q: Are there temperature range differences between substitutes?

A: Yes. The PI6ULS5V9515AWEX and PCA9515AD,118 operate across -40°C ~ 85°C. The LTC4301C variants (commercial grade) operate 0°C ~ 70°C, while LTC4301I variants (industrial grade) operate -40°C ~ 85°C. For applications requiring full -40°C ~ 85°C range, select LTC4301I series parts.

Q: What is the supply voltage compatibility range for substitutes?

A: The PI6ULS5V9515AWEX and PCA9515AD,118 operate at 2.3V ~ 3.6V. The LTC4301 series supports a broader range of 2.7V ~ 5.5V. Designs operating below 2.7V require the PCA9515AD,118 or original PI6ULS5V9515AWEX specification.

Q: Does the LTC4301 hotswap functionality affect I2C bus compatibility?

A: No. The LTC4301 hotswap feature provides additional circuit protection during hot insertion/removal events but does not alter standard I2C ReDriver operation. The part remains fully compatible with 400kHz I2C bus specifications and 2-wire interface requirements.

Q: What packaging options are available for high-volume production?

A: All recommended substitutes are available in Tape & Reel (TR) packaging for automated assembly. The PCA9515AD,118 is available in Cut Tape (CT) and Digi-Reel formats. The LTC4301 series offers both Tube and Tape & Reel options. Verify packaging availability with your supplier for production volume requirements.

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