PCA9517D,112 Equivalent & Substitute Parts

Part Overview

The PCA9517D,112 is a Buffer/ReDriver interface IC designed for I2C applications with 2-channel 400kHz operation in an 8-SO surface mount package. Manufactured by NXP Semiconductors, this part is classified as Obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The device operates across a 2.7V to 5.5V supply range with 5mA maximum supply current and supports standard I2C 2-wire bus input/output configurations.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9517D,112
Manufacturer	NXP Semiconductors
Product Category	Interface - Buffer/ReDriver
Product Status	Obsolete
Type	Buffer, ReDriver
Applications	I2C
Number of Channels	2
Data Rate (Max)	400kHz
Input/Output	2-Wire Bus
Voltage - Supply	2.7V ~ 5.5V
Current - Supply	5mA
Capacitance - Input	6 pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PCA9517D,112 is determined by the following critical parameters:

Functional Equivalence: All substitute parts must operate as I2C Buffer/ReDriver devices with 2-channel configuration and 400kHz maximum data rate.

Electrical Compatibility: Supply voltage range of 2.7V ~ 5.5V is the primary electrical constraint. Parts with extended lower voltage ranges (0.9V) remain compatible as they encompass the required operating window.

Interface Compatibility: All substitutes must support 2-wire bus input and output configurations for I2C applications.

Package Compatibility: The original 8-SOIC package can be substituted with alternative 8-pin packages (8-SO, 8-MSOP, 8-DFN) provided PCB layout accommodates the physical dimensions and pin assignments.

Compliance Requirements: All substitutes must maintain ROHS3 compliance and MSL 1 rating to ensure manufacturing and storage compatibility.

Substitutes are grouped into three categories: direct NXP/TI equivalents in SOIC packaging, Analog Devices LTC4301 series in DFN and MSOP packages, and the TCA9517DR voltage level translator variant.

Parameter Comparison

Part Number	Manufacturer	Product Status	Type	Channels	Data Rate	Supply Voltage	Supply Current	Input Capacitance	Operating Temp	Package
PCA9517D,112	NXP Semiconductors	Obsolete	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	5mA	6 pF	-40°C ~ 85°C	8-SOIC
PCA9517D,118	NXP USA Inc.	Active	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	5mA	6 pF	-40°C ~ 85°C	8-SOIC
PCA9517DR	Texas Instruments	Not For New Designs	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	1.5mA	6 pF	-40°C ~ 85°C	8-SOIC
TCA9517DR	Texas Instruments	Active	Voltage Level Translator	2	—	VCCA: 0.9V ~ 5.5V; VCCB: 2.7V ~ 5.5V	—	—	-40°C ~ 85°C	8-SOIC
LTC4301CDD#PBF	Analog Devices Inc.	Active	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	0°C ~ 70°C	8-DFN (3x3)
LTC4301CDD#TRPBF	Analog Devices Inc.	Active	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	0°C ~ 70°C	8-DFN (3x3)
LTC4301CMS8#PBF	Analog Devices Inc.	Active	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	0°C ~ 70°C	8-MSOP
LTC4301CMS8#TRPBF	Analog Devices Inc.	Active	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	0°C ~ 70°C	8-MSOP
LTC4301IDD#PBF	Analog Devices Inc.	Active	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	-40°C ~ 85°C	8-DFN (3x3)
LTC4301IDD#TRPBF	Analog Devices Inc.	Active	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	-40°C ~ 85°C	8-DFN (3x3)
LTC4301IMS8#PBF	Analog Devices Inc.	Active	Buffer, ReDriver	2	400kHz	2.7V ~ 5.5V	4.5mA	10 pF	-40°C ~ 85°C	8-MSOP

Engineering Selection Recommendations

Direct Replacement (Preferred): PCA9517D,118 is the primary substitute, offering identical electrical specifications and package format with Active product status. This part maintains full compatibility with existing PCB designs and assembly processes.

Alternative SOIC Package: PCA9517DR from Texas Instruments provides equivalent functionality in 8-SOIC packaging with lower supply current (1.5mA vs 5mA). However, this part carries "Not For New Designs" status, limiting its suitability for long-term production.

Active Production Alternatives: The Analog Devices LTC4301 series (all variants) are Active products with full -40°C to 85°C operating range support. These parts require PCB layout modification due to different package formats (8-DFN or 8-MSOP) but offer superior long-term availability and manufacturing support.

Voltage Level Translation Option: TCA9517DR provides bidirectional voltage level translation capability with Active status. This part is suitable only for applications requiring dual-voltage I2C bus interfacing and is not a direct functional equivalent.

Compliance Verification: All recommended substitutes maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can PCA9517D,118 be used as a direct drop-in replacement for PCA9517D,112?

A: Yes. Both parts share identical electrical specifications (2.7V ~ 5.5V supply, 5mA current, 400kHz data rate, 2-channel I2C configuration) and 8-SOIC packaging. The primary difference is product status (Active vs Obsolete) and packaging format (Tape & Reel vs standard). PCB layout and assembly processes require no modification.

Q: What are the key differences between NXP PCA9517 and Analog Devices LTC4301 series?

A: Both provide 2-channel 400kHz I2C buffer/redriver functionality with 2.7V ~ 5.5V supply compatibility. Primary differences include: (1) Package format—PCA9517 uses 8-SOIC while LTC4301 offers 8-DFN or 8-MSOP options; (2) Input capacitance—PCA9517 at 6 pF vs LTC4301 at 10 pF; (3) Supply current—PCA9517 at 5mA vs LTC4301 at 4.5mA; (4) Operating temperature—LTC4301 DFN/MSOP variants limited to 0°C ~ 70°C except LTC4301I series which supports -40°C ~ 85°C. PCB redesign is required for package migration.

Q: Is TCA9517DR a suitable replacement for PCA9517D,112?

A: TCA9517DR is not a direct functional equivalent. While it provides 2-channel 8-SOIC packaging and -40°C ~ 85°C operating range, it functions as a bidirectional voltage level translator rather than an I2C buffer/redriver. Use only if dual-voltage I2C bus interfacing is required.

Q: What packaging options are available for I2C buffer/redriver substitutes?

A: Three package formats are available: 8-SOIC (PCA9517D,118 and PCA9517DR), 8-DFN 3x3 (LTC4301CDD and LTC4301IDD series), and 8-MSOP (LTC4301CMS8 and LTC4301IMS8 series). Package selection impacts PCB footprint, thermal performance, and board space requirements. Verify pin assignment compatibility before PCB layout migration.

Q: Which substitute offers the best long-term availability?

A: Analog Devices LTC4301 series parts carry Active product status with full manufacturing support. Among these, LTC4301IDD#TRPBF and LTC4301IMS8#PBF support the full -40°C ~ 85°C temperature range matching the original PCA9517D,112 specification. NXP PCA9517D,118 is also Active but may have regional availability variations.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes and storage requirements.

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