PCA9617ATPZ Equivalent & Substitute Parts

Part Overview

The PCA9617ATPZ is an I2C buffer and redriver IC manufactured by NXP USA Inc., designed for single-channel 1MHz I2C bus applications. This device conditions and extends I2C signal integrity across longer traces and multiple loads. The part is currently in active production status with 3086 units in stock. Substitute parts are identified when equivalent electrical performance, package compatibility, and supply voltage ranges align with application requirements, enabling design flexibility and supply chain alternatives.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9617ATPZ
Manufacturer	NXP USA Inc.
Device Type	Buffer, ReDriver
Number of Channels	1
Data Rate (Max)	1MHz
Voltage - Supply	0.8V ~ 5.5V, 2.2V ~ 5.5V
Current - Supply	50µA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-WFDFN Exposed Pad
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9617ATPZ is determined by the following criteria:

Primary Substitution Parameters:

Device Type: Buffer or ReDriver functionality for I2C applications
Number of Channels: 1 or 2 channels (2-channel devices remain compatible in single-channel configurations)
Data Rate: Maximum 1MHz or higher (400kHz devices are compatible with 1MHz applications)
Supply Voltage Range: Overlap with 0.8V ~ 5.5V or 2.2V ~ 5.5V
Operating Temperature: -40°C ~ 85°C or compatible range
Package Type: Surface mount 8-pin packages (8-MSOP, 8-VSSOP, 8-WFDFN)
Compliance: ROHS3 compliant, REACH unaffected

Secondary Considerations:

Input/Output Configuration: 2-Wire Bus (I2C standard)
Current Supply: Lower or equivalent current draw
Capacitance - Input: 6pF to 10pF acceptable range

Substitute parts meeting these criteria maintain functional compatibility while offering alternatives in packaging, temperature rating, or supply availability.

Parameter Comparison

Part Number	Manufacturer	Channels	Data Rate (Max)	Supply Voltage	Operating Temp	Package	Current Supply	Product Status
PCA9617ATPZ	NXP USA Inc.	1	1MHz	0.8V ~ 5.5V	-40°C ~ 85°C	8-WFDFN	50µA	Active
LTC4301CMS8#PBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	0°C ~ 70°C	8-MSOP	4.5mA	Active
LTC4301CMS8#TRPBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	0°C ~ 70°C	8-MSOP	4.5mA	Active
LTC4301IMS8#PBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	-40°C ~ 85°C	8-MSOP	4.5mA	Active
LTC4301IMS8#TRPBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	-40°C ~ 85°C	8-MSOP	4.5mA	Active
LTC4301LCMS8#PBF	Analog Devices Inc.	2	400kHz	2.7V ~ 5.5V	0°C ~ 70°C	8-MSOP	4.5mA	Active
PCA9515BDGKR	Texas Instruments	2	400kHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-VSSOP	500µA	Active
PI6ULS5V9515AUEX	Diodes Incorporated	1	400kHz	2.3V ~ 3.6V	-	8-MSOP	1.7mA	Active
PI6ULS5V9517AUEX	Diodes Incorporated	1	400kHz	0.8V ~ 5.5V	-	8-MSOP	500µA	Last Time Buy
PI6ULS5V9617AUEX	Diodes Incorporated	2	-	0.6V ~ 5.5V	-40°C ~ 85°C	8-MSOP	50µA	Last Time Buy
TCA9517ADGKR	Texas Instruments	2	-	VCCA: 0.9V ~ 5.5V, VCCB: 2.7V ~ 5.5V	-40°C ~ 85°C	8-VSSOP	-	Active

Engineering Selection Recommendations

For Active Production Applications: LTC4301IMS8#TRPBF and LTC4301IMS8#PBF are preferred substitutes when extended temperature range (-40°C ~ 85°C) matches the PCA9617ATPZ. Both maintain ROHS3 compliance and REACH unaffected status. The tape and reel packaging (TRPBF) is suitable for high-volume manufacturing.

For Standard Temperature Range (0°C ~ 70°C): LTC4301CMS8#PBF and LTC4301CMS8#TRPBF provide equivalent functionality with active product status. These are suitable for consumer and commercial applications where extended temperature operation is not required.

For Supply Voltage Compatibility: PI6ULS5V9517AUEX maintains the widest supply voltage range (0.8V ~ 5.5V) matching the PCA9617ATPZ primary specification. However, this part is marked Last Time Buy, limiting long-term availability.

For Cost-Optimized Designs: PCA9515BDGKR offers 2-channel functionality in a smaller footprint (8-VSSOP) with active status. Supply voltage is limited to 2.3V ~ 3.6V, restricting use to 3.3V and lower systems.

For Single-Channel 1MHz Applications: PI6ULS5V9515AUEX provides single-channel operation at 400kHz with active status. Supply voltage range (2.3V ~ 3.6V) limits compatibility to 3.3V systems.

Avoid for New Designs: PI6ULS5V9517AUEX and PI6ULS5V9617AUEX are marked Last Time Buy, indicating discontinued or end-of-life status. These are suitable only for legacy system maintenance or existing inventory utilization.

Frequently Asked Questions (FAQ)

Q: Can I use a 2-channel substitute in place of the single-channel PCA9617ATPZ? A: Yes. Two-channel devices (LTC4301 series, PCA9515BDGKR, PI6ULS5V9617AUEX) operate as functional equivalents when only one channel is utilized. The unused channel remains inactive without affecting primary channel performance.

Q: What is the impact of lower data rate specifications in substitute parts? A: Substitute parts rated at 400kHz are compatible with 1MHz applications. The 1MHz PCA9617ATPZ operates within the 400kHz specification envelope, ensuring signal integrity. However, designs requiring maximum 1MHz performance should confirm margin requirements with the substitute manufacturer.

Q: Are there supply voltage restrictions when substituting? A: Yes. The PCA9617ATPZ operates from 0.8V ~ 5.5V. Substitutes with narrower ranges (e.g., PCA9515BDGKR at 2.3V ~ 3.6V) are limited to 3.3V systems. Verify system supply voltage before selection.

Q: How do package differences affect PCB layout? A: The PCA9617ATPZ uses 8-WFDFN with exposed pad. Substitutes use 8-MSOP or 8-VSSOP packages. Thermal and electrical performance may differ. Consult package datasheets for pad dimensions, thermal vias, and trace routing requirements.

Q: Which substitute offers the best long-term availability? A: All active status parts (LTC4301 series, PCA9515BDGKR, PI6ULS5V9515AUEX, TCA9517ADGKR) are suitable for new designs. Avoid Last Time Buy parts (PI6ULS5V9517AUEX, PI6ULS5V9617AUEX) for production designs requiring multi-year supply.

Q: Can I substitute TCA9517ADGKR, which is a voltage level translator? A: TCA9517ADGKR is a bidirectional voltage level translator, not a redriver. While it provides I2C bus conditioning, its functional architecture differs from the PCA9617ATPZ. Use only when dual-voltage I2C translation is required.

Q: What is the significance of operating temperature range differences? A: The PCA9617ATPZ operates -40°C ~ 85°C. Substitutes with 0°C ~ 70°C range are restricted to commercial/consumer applications. Extended temperature parts (LTC4301IMS8 series) match the full industrial range and are preferred for automotive or harsh environment applications.

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitutes maintain ROHS3 compliance and REACH unaffected status, matching the PCA9617ATPZ regulatory requirements.

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