PCA9522DP,118 Equivalent & Substitute Parts

Part Overview

The PCA9522DP,118 is a 1-channel I2C buffer/redriver IC manufactured by NXP USA Inc., designed for 2-wire bus signal conditioning at data rates up to 400kHz. This component operates across a 2.5V to 5.5V supply range with 9mA current consumption and is housed in an 8-TSSOP surface mount package. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	PCA9522DP,118
Manufacturer	NXP USA Inc.
Category	Interface
Type	Buffer, ReDriver
Applications	I2C
Data Rate (Max)	400kHz
Number of Channels	1
Input/Output	2-Wire Bus
Voltage - Supply	2.5V ~ 5.5V
Current - Supply	9mA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	8-TSSOP (0.118", 3.00mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PCA9522DP,118 is determined by the following critical parameters:

Primary Compatibility Criteria:

I2C application support (2-wire bus input/output)
Data rate capability of 400kHz or higher
Surface mount package compatibility (8-TSSOP or equivalent footprint)
Supply voltage range overlap with 2.5V ~ 5.5V
Operating temperature range of -40°C ~ 85°C
ROHS3 compliance and MSL 1 rating

Substitution Categories:

Category A - Direct Functional Equivalents (1-Channel, 400kHz): P82B96PWR, P82B96DR, P82B96D, and P82B96PW are 2-channel buffer/redriver ICs operating at 400kHz with supply voltage range 2V ~ 15V (encompasses the original 2.5V ~ 5.5V), 4mA current consumption, and surface mount packages. These parts exceed the original 1-channel specification but maintain full backward compatibility for I2C applications.

Category B - Enhanced Functionality Alternatives (2-Channel, 400kHz, Hotswap Capable): LTC4300-1IMS8#TRPBF and LTC4303IMS8#TRPBF are 2-channel buffer/accelerator ICs with I2C hotswap capability, 400kHz data rate, supply voltage 2.7V ~ 5.5V, and 8-MSOP packages. These provide additional functionality while maintaining electrical compatibility.

Category C - Legacy Package Variants (1-Channel, 8-SOIC and 8-DIP): P82B715D, P82B715DR, and P82B715P are 1-channel buffer/redriver ICs with 8-SOIC or 8-DIP packages, supporting I2C applications with supply voltage 4.5V ~ 12V and 22mA current consumption. These are suitable for applications where package form factor can be adapted.

Parameter Comparison

Parameter	PCA9522DP,118	P82B96PWR	P82B96DR	LTC4300-1IMS8#TRPBF	LTC4303IMS8#TRPBF	P82B715DR
Manufacturer	NXP USA Inc.	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments
Type	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, Accelerator	Buffer, Accelerator	Buffer, ReDriver
Applications	I2C	I2C	I2C	I2C - Hotswap	I2C - Hotswap	I2C
Data Rate (Max)	400kHz	400kHz	400kHz	400kHz	400kHz	—
Number of Channels	1	2	2	2	2	1
Input/Output	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus
Voltage - Supply	2.5V ~ 5.5V	2V ~ 15V	2V ~ 15V	2.7V ~ 5.5V	2.7V ~ 5.5V	4.5V ~ 12V
Current - Supply	9mA	4mA	4mA	5.1mA	6mA	22mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-TSSOP	8-TSSOP	8-SOIC	8-MSOP	8-MSOP	8-SOIC
Product Status	Obsolete	Last Time Buy	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Active Production (Recommended Primary Substitutes):

P82B96DR and P82B96PWR are the preferred substitutes. Both are active status parts from Texas Instruments with identical electrical specifications: 2-channel 400kHz I2C buffer/redriver, 2V ~ 15V supply range, 4mA current consumption, and -40°C ~ 85°C operating temperature. P82B96DR is packaged in 8-SOIC with 37,600 units in stock, while P82B96PWR is packaged in 8-TSSOP with 15,600 units in stock. The 8-TSSOP variant (P82B96PWR) provides the closest package match to the original PCA9522DP,118.

LTC4303IMS8#TRPBF is an alternative from Analog Devices Inc. with active status, offering 2-channel 400kHz I2C accelerator functionality with hotswap capability. Supply voltage range is 2.7V ~ 5.5V, current consumption is 6mA, and 17,279 units are in stock. This part is suitable for applications requiring enhanced I2C signal conditioning.

For Legacy System Maintenance:

P82B715DR maintains 1-channel functionality with active status and 27,271 units in stock. However, the supply voltage range (4.5V ~ 12V) does not fully overlap with the original 2.5V ~ 5.5V specification, and current consumption is elevated at 22mA. This part is suitable only when the higher supply voltage requirement is acceptable.

Inventory Considerations:

All recommended substitutes maintain ROHS3 compliance and MSL 1 rating. P82B96DR offers the highest inventory availability (37,600 units), followed by LTC4303IMS8#TRPBF (17,279 units) and P82B96PWR (15,600 units).

Frequently Asked Questions (FAQ)

Q: Can P82B96PWR or P82B96DR directly replace PCA9522DP,118 in existing designs?

A: Yes. Both parts support I2C 2-wire bus applications at 400kHz data rate with compatible operating temperature range (-40°C ~ 85°C) and ROHS3 compliance. The supply voltage range (2V ~ 15V) encompasses the original specification (2.5V ~ 5.5V). The primary difference is channel count: P82B96 variants provide 2 channels versus the original 1 channel. For single-channel applications, only one channel requires termination; the second channel can remain unused.

Q: What is the difference between buffer/redriver and buffer/accelerator types?

A: Buffer/redriver ICs (P82B96 series) provide signal restoration and drive capability for I2C buses. Buffer/accelerator ICs (LTC4300/LTC4303 series) provide additional active pull-up functionality and hotswap capability, enabling faster I2C bus transitions and hot-insertion support. Both types are functionally compatible for standard I2C applications.

Q: Are package differences between 8-TSSOP, 8-SOIC, and 8-MSOP significant?

A: Yes. These packages have different footprints and pin spacing. 8-TSSOP (0.118" width) and 8-MSOP (0.118" width) are mechanically similar but not interchangeable without PCB redesign. 8-SOIC (0.154" width) requires different PCB layout. P82B96PWR in 8-TSSOP provides the closest mechanical match to PCA9522DP,118. If PCB redesign is acceptable, 8-SOIC and 8-MSOP variants offer additional inventory options.

Q: Why is P82B715DR not recommended as the primary substitute?

A: P82B715DR has a supply voltage range of 4.5V ~ 12V, which does not fully cover the original 2.5V ~ 5.5V specification. Applications operating at 2.5V or 3.3V would not be compatible. Additionally, current consumption is 22mA versus 9mA for the original part, representing a 2.4x increase in power dissipation. This part is suitable only for systems with higher supply voltages.

Q: What inventory lead times should be expected?

A: All recommended substitutes are listed as new original in stock. P82B96DR has the highest availability (37,600 units), followed by LTC4303IMS8#TRPBF (17,279 units) and P82B96PWR (15,600 units). Consult with your component supplier for current delivery schedules.

Q: Are there any thermal or reliability differences between substitutes?

A: All substitutes maintain identical operating temperature range (-40°C ~ 85°C), ROHS3 compliance, and MSL 1 rating. Current consumption varies: P82B96 variants consume 4mA, LTC4300-1IMS8#TRPBF consumes 5.1mA, and LTC4303IMS8#TRPBF consumes 6mA. Lower current consumption results in reduced thermal dissipation. For thermal-sensitive applications, P82B96 variants are preferred.

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