PCA9513AD,112 Equivalent & Substitute Parts

Part Overview

The PCA9513AD,112 is an I2C/SMBus buffer and accelerator interface component manufactured by NXP USA Inc., designed for hotswap applications requiring single-channel 400kHz data rate operation. This part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing system support. The component operates across a 2.7V to 5.5V supply range and is packaged in an 8-SOIC surface mount configuration with ROHS3 compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9513AD,112
Manufacturer	NXP USA Inc.
Product Category	Interface - Buffer, Accelerator
Product Status	Obsolete
Application	I2C - Hotswap
Number of Channels	1
Data Rate (Max)	400kHz
Input/Output	2-Wire Bus
Voltage Supply Range	2.7V ~ 5.5V
Supply Current	4.6mA
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Input Capacitance	1.9 pF
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the PCA9513AD,112 is determined by the following critical parameters:

Primary Compatibility Criteria:

I2C/SMBus 2-Wire Bus interface (input and output)
Single-channel configuration
400kHz maximum data rate capability
2.7V to 5.5V supply voltage compatibility
Surface mount packaging
ROHS3 compliance
Operating temperature range overlap with -40°C to 85°C

Substitution Categories:

Direct Packaging Equivalent: PCA9513AD,118 maintains identical electrical specifications and 8-SOIC packaging, differing only in product status (Active vs. Obsolete) and packaging format (Tape & Reel).

Functional Equivalent - Same Package: TCA4311ADR from Texas Instruments provides equivalent 8-SOIC packaging and I2C hotswap functionality with compatible voltage supply range and operating temperature, though with different input capacitance (10 pF vs. 1.9 pF) and supply current (5.1mA vs. 4.6mA).

Functional Equivalent - Alternative Package: LTC1694 series devices from Analog Devices Inc. provide I2C buffer/accelerator functionality in SOT-23-5 packaging with compatible voltage supply ranges (2.7V to 6V) and lower supply current (60µA). Multiple variants support 400kHz data rates with extended temperature ranges.

Parameter Comparison

Parameter	PCA9513AD,112	PCA9513AD,118	TCA4311ADR	LTC1694CS5#TRPBF	LTC1694IS5#TRPBF
Manufacturer	NXP USA Inc.	NXP USA Inc.	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active	Active	Active
Type	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator
Application	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C	I2C
Number of Channels	1	1	1	1	1
Data Rate (Max)	400kHz	400kHz	Not specified	400kHz	400kHz
Input/Output	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus
Voltage Supply Range	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 6V	2.7V ~ 6V
Supply Current	4.6mA	4.6mA	5.1mA	60µA	60µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Package Type	8-SOIC	8-SOIC	8-SOIC	SOT-23-5	SOT-23-5
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Footprint): PCA9513AD,118 is the primary recommendation as an active product with identical electrical specifications and 8-SOIC packaging. This substitution requires no PCB layout modifications and maintains full functional compatibility.

For Same-Package Alternative: TCA4311ADR from Texas Instruments provides equivalent 8-SOIC packaging and I2C hotswap capability with active product status. This option is suitable when PCA9513AD,118 availability is constrained. The higher supply current (5.1mA vs. 4.6mA) and different input capacitance should be evaluated for power budget and signal integrity considerations in specific applications.

For Space-Constrained Designs: LTC1694IS5#TRPBF offers the most compact footprint (SOT-23-5) with significantly lower supply current (60µA), making it suitable for power-sensitive applications. This variant maintains the full -40°C to 85°C operating temperature range and 400kHz data rate capability. PCB layout redesign is required due to package change.

For Standard Temperature Range Applications: LTC1694CS5#TRPBF provides equivalent functionality in SOT-23-5 packaging with reduced operating temperature range (0°C to 70°C). This variant is appropriate for non-industrial applications where the narrower temperature specification is acceptable.

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 ratings, ensuring regulatory and environmental compatibility with the original component.

Frequently Asked Questions (FAQ)

Q: Can PCA9513AD,112 be directly replaced with PCA9513AD,118? A: Yes. Both components share identical electrical specifications, 8-SOIC packaging, and I2C hotswap functionality. The primary difference is product status (Obsolete vs. Active) and packaging format (bulk vs. Tape & Reel). No design modifications are required.

Q: What are the key differences between NXP and Texas Instruments I2C buffer options? A: PCA9513AD,118 and TCA4311ADR both provide 8-SOIC packaging and I2C hotswap capability with compatible voltage ranges. TCA4311ADR has higher supply current (5.1mA vs. 4.6mA) and different input capacitance (10 pF vs. 1.9 pF). Selection depends on power budget and signal integrity requirements.

Q: Why would I choose an LTC1694 variant over the NXP or Texas Instruments options? A: LTC1694 devices offer significantly lower supply current (60µA vs. 4.6-5.1mA), making them ideal for battery-powered or power-constrained applications. The trade-off is a smaller SOT-23-5 package requiring PCB redesign. Multiple variants support 400kHz operation with extended temperature ranges.

Q: Is package change from 8-SOIC to SOT-23-5 feasible in existing designs? A: Package change requires PCB layout modification and re-qualification of the design. However, the functional compatibility of LTC1694 series devices makes this transition viable for new production runs or redesigns where power efficiency is prioritized.

Q: Do all substitute parts maintain the same operating temperature range? A: No. LTC1694CS5#TRPBF operates from 0°C to 70°C, while PCA9513AD,118, TCA4311ADR, and LTC1694IS5#TRPBF support -40°C to 85°C. Temperature range selection must align with application requirements.

Q: Are all recommended substitutes ROHS3 compliant? A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL Level 1 ratings, ensuring regulatory compatibility with the original PCA9513AD,112 component.

Q: What is the supply current difference impact between options? A: PCA9513AD,118 and TCA4311ADR draw 4.6-5.1mA, while LTC1694 variants draw 60µA. For applications requiring multiple buffer channels or operating continuously, LTC1694 options provide substantial power savings. For intermittent or low-frequency applications, the difference may be negligible.

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