PCF8575CPW Equivalent & Substitute Parts

Part Overview

The PCF8575CPW is a 16-bit I/O expander with I2C and SMBus interface operating at 400 kHz, manufactured by Texas Instruments in a 24-TSSOP surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The PCF8575CPW provides open drain output configuration with 10mA source and 25mA sink current capability, operating across a 4.5V to 5.5V supply range and -40°C to 85°C temperature range.

Substiute Parts

PCF8575CPW

Texas InstrumentsIn Stock: 726PCF8575CPW Datasheet

Current PartRFQ

PCF8575PWR

Texas InstrumentsIn Stock: 19433PCF8575PWR Datasheet

MFR RecommendedRFQ

MAX7311AUG+

Analog Devices Inc./Maxim IntegratedIn Stock: 2171MAX7311AUG+ Datasheet

MFR RecommendedRFQ

MAX7311AUG+T

Analog Devices Inc./Maxim IntegratedIn Stock: 8016MAX7311AUG+T Datasheet

MFR RecommendedRFQ

XRA1201IG24TR-F

MaxLinear, Inc.In Stock: 3673XRA1201IG24TR-F Datasheet

MFR RecommendedRFQ

XRA1201PIG24TR-F

MaxLinear, Inc.In Stock: 7937XRA1201PIG24TR-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PCF8575CPW is determined by the following critical parameters: 16-bit I/O count, I2C/SMBus 400 kHz interface, 24-TSSOP package compatibility, and supply voltage range. The PCF8575CPW operates at 4.5V to 5.5V with open drain output. Substitute parts must maintain these core electrical and mechanical specifications to ensure direct functional replacement.

The substitute parts are grouped into two categories:

Category 1: Texas Instruments PCF8575 Series (Direct Manufacturer Substitutes)

• PCF8575PWR: Active product status with extended supply voltage range (2.5V ~ 5.5V) and push-pull output configuration
• Same base product number, identical package, and interface specifications

Category 2: Analog Devices MAX7311 Series (Functional Equivalents)

• MAX7311AUG+ and MAX7311AUG+T: Active products with push-pull output, higher current capability (31mA/43mA), and extended operating temperature range (-40°C ~ 125°C)
• Identical I/O count, interface, clock frequency, and package

Category 3: MaxLinear XRA1201 Series (Functional Equivalents)

• XRA1201IG24TR-F and XRA1201PIG24TR-F: Active products with lower supply voltage range (1.65V ~ 3.6V)
• Identical I/O count, interface, clock frequency, and package; XRA1201PIG24TR-F maintains open drain output

Parameter Comparison

Engineering Selection Recommendations

PCF8575PWR is the primary recommended substitute for the PCF8575CPW. Both parts share the same manufacturer (Texas Instruments), base product number (PCF8575), and package specification. PCF8575PWR is in active production status with ROHS3 compliance. The extended supply voltage range (2.5V ~ 5.5V) provides greater design flexibility compared to the original 4.5V ~ 5.5V specification. The push-pull output configuration differs from the open drain output of the PCF8575CPW; circuit designs must account for this output type change.

MAX7311AUG+ and MAX7311AUG+T are suitable alternatives when extended operating temperature range (-40°C ~ 125°C) is required. Both parts maintain identical I/O count, interface, and clock frequency. MAX7311AUG+T is available in cut tape and digi-reel packaging, while MAX7311AUG+ is supplied in tube packaging. Higher output current capability (31mA/43mA) supports applications requiring increased drive strength. Push-pull output configuration requires circuit design verification.

XRA1201PIG24TR-F maintains the open drain output configuration of the PCF8575CPW, making it suitable for designs dependent on open drain characteristics. This part operates at a lower supply voltage range (1.65V ~ 3.6V), restricting its use to low-voltage applications. XRA1201IG24TR-F is an alternative with unspecified output type and current characteristics.

All substitute parts maintain ROHS compliance and identical 24-TSSOP package dimensions, ensuring mechanical compatibility with existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can PCF8575PWR directly replace PCF8575CPW without circuit modifications?

A: PCF8575PWR is mechanically and functionally compatible with identical I/O count, interface, clock frequency, and package. However, the output type differs: PCF8575CPW uses open drain while PCF8575PWR uses push-pull. Circuit designs relying on open drain characteristics require verification and potential modification.

Q: What is the key difference between MAX7311AUG+ and MAX7311AUG+T?

A: Both parts are electrically identical with 16 I/O, I2C/SMBus 400 kHz interface, and 24-TSSOP package. The difference is packaging: MAX7311AUG+ is supplied in tube, while MAX7311AUG+T is supplied in cut tape and digi-reel format. Select based on production volume and assembly line requirements.

Q: Why does XRA1201PIG24TR-F have a lower supply voltage range than PCF8575CPW?

A: XRA1201PIG24TR-F operates at 1.65V ~ 3.6V, which is below the PCF8575CPW specification of 4.5V ~ 5.5V. This part is suitable only for low-voltage applications. For 5V systems, use PCF8575PWR or MAX7311 series instead.

Q: Are all substitute parts RoHS compliant?

A: Yes. PCF8575PWR, MAX7311AUG+, and MAX7311AUG+T are ROHS3 compliant. XRA1201IG24TR-F and XRA1201PIG24TR-F are RoHS compliant. All parts meet environmental compliance requirements for new designs.

Q: Which substitute part is best for high-temperature applications?

A: MAX7311AUG+ and MAX7311AUG+T support operating temperatures from -40°C to 125°C, compared to -40°C to 85°C for PCF8575CPW and other alternatives. Select MAX7311 series for applications requiring extended high-temperature operation.

Q: Can I use XRA1201IG24TR-F in a 5V system?

A: No. XRA1201IG24TR-F operates at 1.65V ~ 3.6V maximum supply voltage and is not suitable for 5V systems. Use PCF8575PWR or MAX7311 series for 5V applications.