PCF8574ADGVR Equivalent & Substitute Parts

Part Overview

The PCF8574ADGVR is an 8-bit I/O expander with I2C interface manufactured by Texas Instruments. This component operates at 100 kHz clock frequency and supports a supply voltage range of 2.5V to 6V, making it suitable for applications requiring remote I/O expansion over I2C bus architecture. The PCF8574ADGVR is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements.

Substiute Parts

PCF8574ADGVR

Texas InstrumentsIn Stock: 3143PCF8574ADGVR Datasheet

Current PartRFQ

PCF8574APWR

Texas InstrumentsIn Stock: 38385PCF8574APWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCF8574ADGVR is determined by strict equivalence across the following critical parameters:

• Number of I/O: 8 bits
• Interface Protocol: I2C at 100 kHz
• Voltage Supply Range: 2.5V ~ 6V
• Operating Temperature Range: -40°C ~ 85°C
• Output Configuration: Push-Pull with 1mA/25mA source/sink capability
• Interrupt Output: Present
• Power-On Reset (POR): Enabled
• RoHS3 Compliance: Required
• MSL Rating: 1 (Unlimited)

The PCF8574APWR qualifies as a direct substitute based on identical electrical specifications and functional characteristics. The primary distinction between these parts is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The PCF8574APWR is the manufacturer-recommended substitute for the obsolete PCF8574ADGVR. Both parts share identical electrical specifications, functional capabilities, and compliance certifications (ROHS3, REACH Unaffected, EAR99 classification). The PCF8574APWR maintains active product status with significantly higher inventory availability (38,350 units versus 3,100 units for the original part).

The packaging difference between 20-TFSOP and 20-TSSOP formats does not affect electrical or functional compatibility. Both packages maintain the same 0.173" width and 4.40mm body dimensions, ensuring PCB layout compatibility for standard surface mount assembly processes.

For new designs and production continuity, the PCF8574APWR is the appropriate selection due to its active status and manufacturer recommendation.

Frequently Asked Questions (FAQ)

Q: Can the PCF8574APWR be used as a direct replacement for the PCF8574ADGVR in existing designs?

A: Yes. The PCF8574APWR is electrically and functionally identical to the PCF8574ADGVR across all specified parameters. No circuit modifications are required for substitution.

Q: What is the difference between the 20-TFSOP and 20-TSSOP packages?

A: Both packages are 20-pin thin small outline packages with identical body dimensions (0.173" width, 4.40mm). The primary difference is internal lead frame design. Both are compatible with standard surface mount assembly equipment and PCB layouts designed for either format.

Q: Why is the PCF8574ADGVR classified as obsolete?

A: Product obsolescence is determined by the manufacturer. The PCF8574APWR represents the active continuation of this product line with identical specifications.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts carry identical RoHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification.

Q: What is the inventory status for each part?

A: The PCF8574ADGVR has 3,100 units in stock. The PCF8574APWR has 38,350 units in stock, providing greater availability for production requirements.