PCA9513D,112 I2C Buffer Accelerator Equivalent & Substitute Parts

Part Overview

The PCA9513D,112 is an I2C/SMBus hotswap buffer accelerator manufactured by NXP USA Inc., housed in an 8-SOIC package. This single-channel interface component operates at 400kHz maximum data rate with a supply voltage range of 2.7V to 5.5V. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system designs and maintenance applications. Substitute parts must maintain functional compatibility across I2C hotswap applications while meeting the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9513D,112
Manufacturer	NXP USA Inc.
Product Category	Interface - Buffer, Accelerator
Application	I2C - Hotswap
Number of Channels	1
Data Rate (Max)	400kHz
Voltage Supply Range	2.7V ~ 5.5V
Current Supply	2.8mA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Input / Output	2-Wire Bus
Input Capacitance	10 pF
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PCA9513D,112 is determined by the following critical parameters:

Primary Compatibility Criteria:

Single-channel I2C buffer/accelerator architecture
I2C hotswap application support
2-Wire bus input and output configuration
10 pF input capacitance
Supply voltage range compatibility (minimum 2.7V, maximum 5.5V overlap)
Operating temperature range overlap (-40°C to 85°C preferred for industrial applications)
Surface mount technology
RoHS3 compliance

Package Considerations: Substitutes are grouped by package type. The original 8-SOIC package can be replaced by functionally equivalent parts in 8-SOIC, 8-DFN, or SOT-23-5 packages, provided the electrical specifications remain compatible.

Data Rate Compatibility: The PCA9513D,112 operates at 400kHz maximum. Substitute parts must support this data rate or higher to maintain system performance.

Parameter Comparison

Parameter	PCA9513D,112 (Main)	TCA4311ADR	LTC1694CS5#TRPBF	LTC4313CDD-1#PBF
Manufacturer	NXP USA Inc.	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active	Active
Type	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator	Buffer, Accelerator
Application	I2C - Hotswap	I2C - Hotswap	I2C	I2C - Hotswap
Number of Channels	1	1	1	1
Data Rate (Max)	400kHz	Not specified	400kHz	400kHz
Voltage Supply Range	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 6V	2.9V ~ 5.5V
Current Supply	2.8mA	5.1mA	60µA	8.1mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C
Input Capacitance	10 pF	10 pF	Not specified	10 pF
Package / Case	8-SOIC	8-SOIC	SOT-23-5	8-DFN (3x3)
Input / Output	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Package Replacement (8-SOIC): The TCA4311ADR from Texas Instruments provides the closest form-factor match in 8-SOIC packaging. It maintains identical supply voltage range (2.7V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and input capacitance (10 pF) specifications. Both parts are RoHS3 compliant with MSL 1 rating. The TCA4311ADR is currently in active production status, ensuring long-term availability.

Alternative Package Options: For designs permitting package changes, the LTC1694 series from Analog Devices Inc. offers multiple variants in SOT-23-5 packaging. The LTC1694IS5#TRPBF and LTC1694IS5#TRMPBF variants support 400kHz data rate operation with -40°C to 85°C temperature range, matching the original part's thermal specifications. These parts feature significantly lower supply current (60µA versus 2.8mA), providing power efficiency benefits in battery-powered applications.

The LTC4313CDD-1#PBF from Analog Devices Inc. in 8-DFN packaging maintains hotswap functionality with 400kHz data rate support and 10 pF input capacitance. Operating temperature range is 0°C to 70°C, suitable for commercial and industrial environments.

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

Frequently Asked Questions (FAQ)

Q: Can the TCA4311ADR directly replace the PCA9513D,112 without PCB modifications? A: Yes. The TCA4311ADR shares identical 8-SOIC pinout and electrical specifications (2.7V ~ 5.5V supply, -40°C ~ 85°C operating range, 10 pF input capacitance). No PCB layout changes are required for direct substitution.

Q: What is the primary difference between the LTC1694 SOT-23-5 variants and the original 8-SOIC package? A: The LTC1694 series uses SOT-23-5 packaging, which is physically smaller than 8-SOIC. PCB layout modifications are necessary. However, the electrical interface remains compatible for I2C applications. Verify pinout alignment before implementation.

Q: Are the LTC1694-1 and LTC1694 variants interchangeable? A: No. The LTC1694-1 series supports 100kHz maximum data rate, while the LTC1694 series (without the "-1" suffix) supports 400kHz. For applications requiring 400kHz operation, use LTC1694CS5#TRPBF, LTC1694IS5#TRMPBF, or LTC1694IS5#TRPBF variants.

Q: Does the LTC4313CDD-1#PBF support hotswap applications? A: Yes. The LTC4313CDD-1#PBF is specified for I2C hotswap applications with 400kHz data rate support and 10 pF input capacitance, maintaining functional equivalence with the original PCA9513D,112.

Q: What are the temperature range implications when selecting substitutes? A: The original PCA9513D,112 operates from -40°C to 85°C. The TCA4311ADR and LTC1694IS5 variants maintain this range. The LTC1694-1 and LTC4313CDD-1#PBF variants operate from 0°C to 70°C, limiting use in extended temperature applications. Verify application temperature requirements before selection.

Q: Is supply current a critical factor in substitute selection? A: Supply current differences exist between substitutes (2.8mA original, 5.1mA TCA4311ADR, 60µA LTC1694 series, 8.1mA LTC4313CDD-1#PBF). For battery-powered or power-constrained designs, the LTC1694 series offers significant advantages. For standard applications, current differences are typically non-critical.

Q: Are all recommended substitutes available in high volume? A: Yes. Current inventory levels are: TCA4311ADR (17,861 pcs), LTC1694CS5#TRPBF (6,436 pcs), LTC1694IS5#TRPBF (7,323 pcs), LTC1694IS5#TRMPBF (30,484 pcs), and LTC4313CDD-1#PBF (19,616 pcs), ensuring supply continuity for production applications.

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