PCF8574PWG4 Equivalent & Substitute Parts

Part Overview

The PCF8574PWG4 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 obsolete, making substitute parts necessary for new designs and ongoing production requirements. The PCF8574PWG4 provides push-pull output capability with 1mA/25mA source/sink current and operates across a 2.5V to 6V supply voltage range with power-on reset functionality.

Substiute Parts

PCF8574PWG4

Texas InstrumentsIn Stock: 1113PCF8574PWG4 Datasheet

Current PartRFQ

PCF8574PW

Texas InstrumentsIn Stock: 205446PCF8574PW Datasheet

MFR RecommendedRFQ

PCF8574PWR

Texas InstrumentsIn Stock: 68419PCF8574PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCF8574PWG4 are qualified based on strict electrical and mechanical parameter matching. All substitute candidates maintain identical specifications across the following critical parameters:

• 8-bit I/O configuration with I2C interface at 100 kHz operation
• Push-pull output topology with 1mA/25mA source/sink current capability
• Supply voltage range of 2.5V to 6V
• Operating temperature range of -40°C to 85°C
• Power-on reset (POR) feature with interrupt output capability
• 20-TSSOP surface mount package with 0.173" width (4.40mm)
• ROHS3 compliance and MSL 1 rating

The PCF8574PW and PCF8574PWR are direct functional equivalents sharing the PCF8574 base product number and identical electrical characteristics. Substitution is determined solely by these matching parameters and package compatibility.

Parameter Comparison

Engineering Selection Recommendations

The PCF8574PWR is the primary substitute for new designs and production applications. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. The PCF8574PWR is supplied in Cut Tape (CT) and Digi-Reel® packaging formats with 68,323 units in current inventory.

The PCF8574PW serves as an alternative substitute with identical electrical and mechanical specifications. However, this part carries obsolete product status classification. The PCF8574PW is available in Tube packaging with 205,400 units in inventory.

Both substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching the original PCF8574PWG4 specifications. Selection between PCF8574PWR and PCF8574PW should prioritize the active-status PCF8574PWR for applications requiring extended product lifecycle support.

Frequently Asked Questions (FAQ)

Q: Can PCF8574PW or PCF8574PWR be used as direct replacements for PCF8574PWG4?

A: Yes. Both parts are direct functional equivalents with identical electrical parameters, I/O configuration, interface specifications, and 20-TSSOP package dimensions. All three parts share the PCF8574 base product number and maintain matching supply voltage, operating temperature, and output current specifications.

Q: What is the difference between PCF8574PWR and PCF8574PW?

A: The primary difference is product status. PCF8574PWR maintains active status with Texas Instruments, while PCF8574PW is classified as obsolete. Both parts have identical electrical and mechanical specifications. PCF8574PWR is supplied in Cut Tape (CT) and Digi-Reel® packaging; PCF8574PW is supplied in Tube packaging.

Q: Are there package compatibility considerations between these parts?

A: No. All three parts use the 20-TSSOP surface mount package with identical 0.173" width (4.40mm) dimensions. PCB footprints and assembly processes are interchangeable.

Q: Do these substitute parts maintain the same compliance certifications?

A: Yes. PCF8574PWR and PCF8574PW are both ROHS3 compliant with MSL 1 (Unlimited) ratings, matching the PCF8574PWG4 specifications. Both parts are REACH Unaffected and carry EAR99 ECCN classification.

Q: Which substitute part should be selected for new production?

A: PCF8574PWR is recommended for new designs and ongoing production due to its active product status, ensuring continued availability and manufacturer support. PCF8574PW may be considered only when PCF8574PWR availability is constrained.