PCF8574APWRE4 Equivalent & Substitute Parts

Part Overview

The PCF8574APWRE4 is an 8-bit I/O expander with I2C interface operating at 100 kHz, manufactured by Texas Instruments in a 20-TSSOP surface mount package. This component is classified as discontinued at DiGi Electronics, making identification of suitable substitutes essential for ongoing design support and procurement planning. The part provides push-pull output capability with configurable source/sink current and includes power-on reset (POR) functionality, operating across a 2.5V to 6V supply range suitable for mixed-voltage embedded systems.

Substiute Parts

PCF8574APWRE4

Texas InstrumentsIn Stock: 1183PCF8574APWRE4 Datasheet

Current PartRFQ

PCF8574APWR

Texas InstrumentsIn Stock: 38385PCF8574APWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCF8574APWRE4 is determined by strict equivalence across the following critical parameters:

• I/O Configuration: 8-bit I/O expander architecture
• Interface Protocol: I2C at 100 kHz clock frequency
• Electrical Specifications: 2.5V to 6V supply voltage, -40°C to 85°C operating range
• Output Characteristics: Push-pull output with 1mA/25mA source/sink capability
• Package Specification: 20-TSSOP surface mount form factor
• Functional Features: Interrupt output and power-on reset capability

The PCF8574APWR qualifies as a direct substitute based on identical electrical, functional, and package specifications. The primary distinction is product status and packaging format availability.

Parameter Comparison

Engineering Selection Recommendations

The PCF8574APWR is the direct functional equivalent of the PCF8574APWRE4. Both components share identical electrical specifications, pin configuration, and operational characteristics. Selection between these parts should be based on the following factors:

Product Status: The PCF8574APWRE4 is discontinued at DiGi Electronics, whereas the PCF8574APWR maintains active status. For new designs or long-term production requirements, the PCF8574APWR is the appropriate selection.

Compliance & Certifications: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical MSL ratings, ensuring equivalent environmental and regulatory suitability.

Packaging & Availability: The PCF8574APWR offers expanded packaging options (Cut Tape and Digi-Reel) with significantly higher inventory availability (38,350 units versus 1,127 units), supporting both prototype and production-volume procurement strategies.

Pin-for-Pin Compatibility: Identical 20-TSSOP package specifications ensure direct PCB layout compatibility without redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can the PCF8574APWR be used as a direct replacement for the PCF8574APWRE4 in existing designs?

A: Yes. Both components are pin-for-pin compatible with identical electrical specifications, I2C protocol implementation, and 20-TSSOP package dimensions. No circuit modifications are required.

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

A: The PCF8574APWRE4 is discontinued at DiGi Electronics, indicating no further procurement availability through this distributor. The PCF8574APWR maintains active status with ongoing manufacturing and distribution support.

Q: Are there any differences in I2C protocol implementation between these parts?

A: No. Both components implement identical I2C interface specifications at 100 kHz clock frequency with matching interrupt output and power-on reset functionality.

Q: How do the supply voltage and operating temperature ranges compare?

A: Both parts operate identically across 2.5V to 6V supply voltage and -40°C to 85°C temperature range, ensuring equivalent performance in all specified operating conditions.

Q: What packaging options are available for the substitute part?

A: The PCF8574APWR is available in Cut Tape (CT) and Digi-Reel packaging formats, providing flexibility for both small-quantity and high-volume procurement scenarios.

Q: Are compliance certifications equivalent between these parts?

A: Yes. Both components maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity level (MSL 1 - Unlimited), ensuring equivalent regulatory and environmental suitability.