2pcs ISO1540 Bidirectional I2C Isolator with 2500V-RMS Electrical Isolation – Stemma QT/Qwiic Compatible

Key Features2500V-RMS Galvanic Isolation:Creates a safe barrier between two I2C bus sides, preventing electrical noise and transient spikes (e.g., from motors, power supplies) from affecting signal integrity.Suitable for isolating grounded controllers from ungrounded devices or separating high/low voltage domains.High-Performance Communication:Supports I2C clock rates up to 1MHz with full bidirectional data flow and clock stretching, compatible with standard, fast, and fast-mode plus I2C devices.Open-drain architecture on both sides allows flexible voltage translation (3V–5.5V) for mixed-voltage systems.Plug-and-Play Connectivity:Dual STEMMA QT/Qwiic connectors enable quick, solderless integration with SparkFun Qwiic-compatible boards, sensors, and cables.Breakout pads for power (VCC), ground (GND), clock (SCL), and data (SDA) on both isolated sides for direct wiring if needed.Rugged Design for Harsh Environments:ESD Protection: 4kV HBM on all pins (8kV on bus pins) safeguards against electrostatic discharge during handling and operation.Transient Immunity: ±50kV/μs typical common-mode transient rejection prevents interference from high-speed voltage spikes.Wide Temperature Range: Operates reliably from -40°C to +125°C, suitable for industrial, automotive, and outdoor applications.Technical SpecificationsIsolation Rating: 2500V-RMS (50Hz, 1min) between isolated sides.Data Rate: Up to 1MHz (I2C fast-mode plus compatible).Power Supply: 3V–5.5V (independent for both sides).Current Capability: 3.5mA sinking current (Side 1), 35mA sinking current (Side 2).ESD Protection: 4kV HBM (all pins), 8kV HBM (bus pins, SCL/SDA).Transient Immunity: ±50kV/μs (typical common-mode rejection).Operating Temperature: -40°C to +125°C (industrial grade).Form Factor: STEMMA QT/Qwiic-compatible PCB with dual connectors and breakout pads.Package Includes2x Module

• Complete Electrical Isolation - Provides 2500V-RMS galvanic isolation between I2C bus controller and devices to prevent ground loops, reduce noise, and protect against transient voltage spikes.
• High-Speed Bidirectional Communication - Supports full-duplex I2C communication up to 1MHz clock rate with clock stretching, ensuring compatibility with high-speed sensors and microcontrollers.
• Plug-and-Play STEMMA QT Interface - Features dual STEMMA QT/Qwiic connectors for solderless integration, enabling easy connection to development boards, sensors, and accessories without complex wiring.
• Robust Protection & Flexibility - Open-drain outputs with 3.5mA (Side 1) and 35mA (Side 2) sinking current; 4kV HBM ESD protection on all pins (8kV on bus pins) for rugged operation.
• Wide Operational Range - Works with 3V–5.5V power supplies on both isolated sides; operates in extreme temperatures (-40°C to +125°C) with ±50kV/μs transient immunity for industrial environments.