PCF8575PWRE4 Equivalent & Substitute Parts

Part Overview

The PCF8575PWRE4 is a 16-bit I/O expander IC designed for I2C and SMBus communication at 400 kHz, packaged in 24-TSSOP surface mount configuration. This component is discontinued at DiGi Electronics, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production runs and field replacements.

Substiute Parts

PCF8575PWRE4

Texas InstrumentsIn Stock: 917PCF8575PWRE4 Datasheet

Current PartRFQ

PCF8575PWR

Texas InstrumentsIn Stock: 19433PCF8575PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCF8575PWRE4 is determined by strict equivalence across the following critical parameters:

• I/O Configuration: 16-bit I/O expander functionality
• Communication Protocol: I2C and SMBus compatibility at 400 kHz clock frequency
• Electrical Specifications: Supply voltage range 2.5V ~ 5.5V, output characteristics (Push-Pull, 1mA/25mA source/sink)
• Package Compatibility: 24-TSSOP surface mount package with identical physical dimensions
• Operating Range: Temperature range -40°C ~ 85°C
• Regulatory Compliance: ROHS3 compliance and MSL rating

The PCF8575PWR meets all these criteria as a direct substitute, sharing identical electrical and mechanical specifications while maintaining active product status.

Parameter Comparison

Engineering Selection Recommendations

The PCF8575PWR is the direct equivalent for PCF8575PWRE4 replacement. Both parts share identical electrical specifications, package configuration, and regulatory compliance status. The primary distinction is product availability: PCF8575PWRE4 is discontinued, while PCF8575PWR maintains active status with higher inventory availability (19,400 units in stock versus 863 units for the original part).

For new designs and production runs, PCF8575PWR is the appropriate selection. For existing applications using PCF8575PWRE4, PCF8575PWR provides pin-for-pin and functional compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can PCF8575PWR be used as a direct replacement for PCF8575PWRE4?

A: Yes. Both parts are identical in electrical performance, package type, and pin configuration. PCF8575PWR is the active production equivalent.

Q: Are there any differences in packaging between these parts?

A: Both parts use 24-TSSOP surface mount packaging with identical physical dimensions (0.173" width, 4.40mm). Packaging format differs only in supply method: PCF8575PWRE4 uses standard packaging, while PCF8575PWR is available in Cut Tape and Digi-Reel formats.

Q: What is the significance of the product status difference?

A: PCF8575PWRE4 is discontinued at DiGi Electronics, limiting future availability. PCF8575PWR maintains active status with established supply chain support, ensuring long-term component availability for production and field service.

Q: Are both parts RoHS compliant?

A: Yes. Both PCF8575PWRE4 and PCF8575PWR are ROHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level).

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. Identical package, pinout, and electrical specifications enable direct substitution without PCB redesign or firmware modification.