PCF8574DGVRG4 Equivalent & Substitute Parts

Part Overview

The PCF8574DGVRG4 is an 8-bit I/O expander with I2C interface operating at 100 kHz, manufactured by Texas Instruments. This component is designed for applications requiring remote I/O expansion over I2C bus communication. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives to maintain design continuity and support ongoing production requirements.

Substiute Parts

PCF8574DGVRG4

Texas InstrumentsIn Stock: 892PCF8574DGVRG4 Datasheet

Current PartRFQ

PCF8574DGVR

Texas InstrumentsIn Stock: 3218PCF8574DGVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCF8574DGVRG4 is determined by strict equivalence across the following critical parameters:

• I/O Configuration: 8-bit I/O expander
• Communication Protocol: I2C interface at 100 kHz clock frequency
• Electrical Specifications: 2.5V ~ 6V supply voltage, -40°C ~ 85°C operating temperature range
• Output Characteristics: Push-Pull output type with 1mA/25mA source/sink current capability
• Functional Features: Interrupt output capability with Power-On Reset (POR)
• Physical Package: 20-TFSOP surface mount package
• Compliance: ROHS3 compliant, MSL Level 1

The PCF8574DGVR qualifies as a direct substitute based on identical electrical specifications, functional features, and package configuration. Both parts share the same base product number (PCF8574) and maintain full parameter compatibility.

Parameter Comparison

Engineering Selection Recommendations

The PCF8574DGVR is a direct functional equivalent to the PCF8574DGVRG4. Both parts maintain identical electrical characteristics, I/O configuration, and package specifications. The substitute part carries equivalent ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and environmental requirements.

Selection between these parts should be based on availability and supply chain considerations. The PCF8574DGVR currently maintains higher inventory levels (3158 Pcs) compared to the original part number. Both parts are manufactured by Texas Instruments and share the same base product designation (PCF8574), confirming functional interchangeability at the circuit design level.

Frequently Asked Questions (FAQ)

Q: Can the PCF8574DGVR be used as a direct replacement for the PCF8574DGVRG4?

A: Yes. Both parts are electrically and functionally identical. They share the same I/O configuration (8-bit), interface protocol (I2C 100 kHz), supply voltage range (2.5V ~ 6V), operating temperature range (-40°C ~ 85°C), output characteristics (Push-Pull), and package specification (20-TFSOP). No circuit modifications are required.

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

A: No. Both parts maintain identical ROHS3 compliance status and Moisture Sensitivity Level 1 (Unlimited) rating. They are equivalent from a regulatory and environmental standpoint.

Q: What is the significance of the different product status designations?

A: The PCF8574DGVRG4 is listed as discontinued at DiGi Electronics, while the PCF8574DGVR is listed as obsolete. Both designations indicate limited or unavailable supply through standard distribution channels. The PCF8574DGVR maintains higher current inventory availability.

Q: Are the packaging options different between these parts?

A: Both parts use identical 20-TFSOP surface mount packages with 0.173" width (4.40mm). The PCF8574DGVR is available in Cut Tape (CT) and Digi-Reel® packaging options, providing flexibility for different procurement volumes.

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

A: Yes. The identical package specification (20-TFSOP) and pin configuration ensure direct PCB compatibility. No layout modifications or design changes are necessary for substitution.