PCA9534PW I/O Expander Equivalent & Substitute Parts

Part Overview

The PCA9534PW is an 8-bit I/O expander designed for I2C and SMBus communication at 400 kHz, manufactured by Texas Instruments in a 16-TSSOP surface mount package. This part is classified as obsolete, making equivalent and substitute components necessary for new designs and ongoing production requirements. The PCA9534PW provides push-pull output configuration with 10mA/25mA source/sink capability and operates across a 2.3V to 5.5V supply range with -40°C to 85°C temperature tolerance.

Substiute Parts

PCA9534PW

Texas InstrumentsIn Stock: 5259PCA9534PW Datasheet

Current PartRFQ

MAX7315AUE+

Analog Devices Inc./Maxim IntegratedIn Stock: 1621MAX7315AUE+ Datasheet

MFR RecommendedRFQ

MAX7315AUE+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3314MAX7315AUE+T Datasheet

MFR RecommendedRFQ

PCA9534PW,118

NXP USA Inc.In Stock: 8148PCA9534PW,118 Datasheet

MFR RecommendedRFQ

PCA9674APW,118

NXP USA Inc.In Stock: 54576PCA9674APW,118 Datasheet

MFR RecommendedRFQ

PCA9674PW,118

NXP USA Inc.In Stock: 6335PCA9674PW,118 Datasheet

MFR RecommendedRFQ

PCA9674PW/S911,118

NXP SemiconductorsIn Stock: 1023PCA9674PW/S911,118 Datasheet

MFR RecommendedRFQ

XRA1200IG16TR-F

MaxLinear, Inc.In Stock: 6050XRA1200IG16TR-F Datasheet

MFR RecommendedRFQ

XRA1200PIG16TR-F

MaxLinear, Inc.In Stock: 3010XRA1200PIG16TR-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PCA9534PW is determined by the following critical parameters: 8-bit I/O count, I2C/SMBus interface compatibility, 400 kHz clock frequency, 16-TSSOP package format, and surface mount mounting type. Substitute parts are grouped into two categories based on electrical compatibility:

Category 1: Direct Functional Equivalents (400 kHz I2C/SMBus)

• MAX7315AUE+ and MAX7315AUE+T (Analog Devices Inc./Maxim Integrated)
• XRA1200IG16TR-F and XRA1200PIG16TR-F (MaxLinear, Inc.)
• PCA9534PW,118 (NXP USA Inc. - active production variant)

These parts maintain 8 I/O, I2C/SMBus interface, 400 kHz operation, and 16-TSSOP packaging. Differences exist in output type (open drain vs. push-pull), supply voltage range, and temperature operating range.

Category 2: Enhanced Frequency Alternatives (1 MHz I2C)

• PCA9674APW,118 and PCA9674PW,118 (NXP USA Inc.)
• PCA9674PW/S911,118 (NXP Semiconductors)

These parts provide 8 I/O, I2C interface, 1 MHz clock frequency (higher than original), and 16-TSSOP packaging. They are suitable where increased I2C bus speed is acceptable and beneficial.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete PCA9534PW with active production status and identical electrical characteristics, the PCA9534PW,118 from NXP USA Inc. is the primary selection. This part maintains push-pull output configuration, identical supply voltage range (2.3V ~ 5.5V), 400 kHz I2C/SMBus operation, and 16-TSSOP packaging. Both parts are ROHS3 compliant with MSL 1 rating.

For designs where higher I2C bus frequency is acceptable, the PCA9674APW,118, PCA9674PW,118, or PCA9674PW/S911,118 variants provide 1 MHz operation while maintaining push-pull outputs, identical supply voltage, and 16-TSSOP packaging. These parts are suitable for systems where increased I2C throughput provides system benefits.

For applications where open-drain output configuration is compatible with system design, the MAX7315AUE+ and MAX7315AUE+T from Analog Devices Inc./Maxim Integrated offer 400 kHz I2C/SMBus operation with higher output current capability (50mA) and extended temperature range (-40°C ~ 125°C). Supply voltage range is narrower (2V ~ 3.6V), requiring verification against system requirements.

The XRA1200IG16TR-F and XRA1200PIG16TR-F from MaxLinear, Inc. provide 400 kHz I2C/SMBus operation with open-drain output in 16-TSSOP packaging. Supply voltage range (1.65V ~ 3.6V) is lower than the original part, suitable for low-voltage applications.

All substitute parts maintain ROHS3 compliance and MSL 1 rating, supporting equivalent environmental and reliability standards.

Frequently Asked Questions (FAQ)

Q: Can MAX7315AUE+ directly replace PCA9534PW in existing designs?

A: Electrical substitution requires verification of output type compatibility. The MAX7315AUE+ uses open-drain output versus the PCA9534PW push-pull configuration. System pull-up resistor requirements and load characteristics must be evaluated. Supply voltage range differs (2V ~ 3.6V vs. 2.3V ~ 5.5V), requiring confirmation that system voltage falls within both ranges. Package and pinout are identical (16-TSSOP).

Q: What is the difference between PCA9674 variants and the original PCA9534PW?

A: The PCA9674 series operates at 1 MHz I2C frequency versus 400 kHz for the PCA9534PW. This higher frequency is backward compatible with 400 kHz I2C systems but may require system validation. All other parameters including 8 I/O count, push-pull output, supply voltage (2.3V ~ 5.5V), and 16-TSSOP packaging remain equivalent.

Q: Are packaging differences between tube and tape & reel significant for substitution?

A: Packaging format (tube, cut tape, tape & reel) affects handling, storage, and assembly processes but does not impact electrical or mechanical compatibility. Selection depends on production volume and assembly equipment requirements. The 16-TSSOP package dimensions remain identical across all variants.

Q: Which substitute part has the widest operating temperature range?

A: The MAX7315AUE+ and MAX7315AUE+T from Analog Devices Inc./Maxim Integrated operate across -40°C ~ 125°C, extending 40°C above the original PCA9534PW specification (-40°C ~ 85°C). This extended range is beneficial for industrial and automotive applications.

Q: Can XRA1200 series parts operate at the same supply voltage as PCA9534PW?

A: The XRA1200IG16TR-F and XRA1200PIG16TR-F operate at 1.65V ~ 3.6V supply voltage, which does not fully overlap the PCA9534PW range (2.3V ~ 5.5V). These parts are suitable only for systems operating within the 1.65V ~ 3.6V window. Verification against system power supply specifications is required.

Q: What is the significance of the ",118" suffix in NXP part numbers?

A: The ",118" suffix indicates a specific packaging or distribution variant from NXP. The electrical and functional specifications remain identical to the base part number. Selection between variants depends on supplier availability and packaging format requirements.