PCF8574DWRG4 Equivalent & Substitute Parts

Part Overview

The PCF8574DWRG4 is an 8-bit I/O expander with I2C interface operating at 100 kHz, packaged in 16-SOIC surface mount configuration. This component enables parallel port expansion for microcontroller applications requiring additional digital I/O lines. The PCF8574DWRG4 carries an Obsolete product status, making identification of active equivalent parts essential for new designs and ongoing production support.

Substiute Parts

PCF8574DWRG4

Texas InstrumentsIn Stock: 2170PCF8574DWRG4 Datasheet

Current PartRFQ

PCF8574DWR

Texas InstrumentsIn Stock: 104771PCF8574DWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCF8574DWRG4 is determined by strict equivalence across the following critical parameters:

• I/O Configuration: 8-bit parallel I/O count
• Communication Protocol: I2C interface at 100 kHz clock frequency
• Electrical Specifications: 2.5V to 6V supply voltage range, push-pull output type with 1mA/25mA source/sink capability
• Physical Form Factor: 16-SOIC surface mount package with identical 0.295" (7.50mm) width
• Environmental Compliance: ROHS3 compliance, MSL Level 1 rating, and operating temperature range of -40°C to 85°C

The PCF8574DWR meets all substitution criteria as an active product variant of the same base PCF8574 series, maintaining identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The PCF8574DWR is the direct active equivalent for the obsolete PCF8574DWRG4. Both components share identical electrical characteristics, mechanical specifications, and environmental compliance ratings. The primary distinction is product lifecycle status: PCF8574DWRG4 is classified as Obsolete, while PCF8574DWR maintains Active status with significantly higher inventory availability (104,736 units versus 2,100 units).

For new designs and production continuity, PCF8574DWR is the appropriate selection. Both parts maintain ROHS3 compliance and are suitable for applications requiring 8-bit I2C-based I/O expansion across the specified voltage and temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can PCF8574DWR directly replace PCF8574DWRG4 in existing designs?

A: Yes. Both parts are functionally and electrically identical across all specified parameters. No circuit modifications are required for substitution.

Q: What is the difference between PCF8574DWRG4 and PCF8574DWR?

A: The primary difference is packaging designation and product status. PCF8574DWRG4 is Obsolete; PCF8574DWR is Active. The suffix variations reflect supplier packaging and handling specifications, but electrical and mechanical specifications remain identical.

Q: Are there any compatibility concerns with the 16-SOIC package?

A: No. Both parts use identical 16-SOIC (0.295", 7.50mm Width) surface mount packages. PCB footprints, reflow profiles, and assembly processes are directly compatible.

Q: What supply voltage range is supported?

A: Both parts operate across 2.5V to 6V supply voltage range, supporting 3.3V and 5V logic systems.

Q: Is the I2C clock frequency the same for both parts?

A: Yes. Both parts operate at 100 kHz I2C clock frequency.

Q: Are environmental compliance ratings identical?

A: Yes. Both parts are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating and operate across -40°C to 85°C temperature range.