Reference: RBD-0397
Banner

The ISO1540 is a bidirectional I2C isolator module designed to provide full electrical isolation between two I2C bus segments. It allows safe and reliable communication between controllers and peripherals that operate on different grounds or power domains, helping reduce noise and protect sensitive electronics.
The ISO1540 is a bidirectional I2C isolator module designed to provide full electrical isolation between two I2C bus segments. It allows safe and reliable communication between controllers and peripherals that operate on different grounds or power domains, helping reduce noise and protect sensitive electronics.
Bidirectional I2C bus isolation
Full electrical isolation between two I2C sides
Supports standard and fast-mode I2C operation
Clock stretching supported
Independent power supply on each isolated side
STEMMA QT / Qwiic connectors available and compatible
Isolation IC: ISO1540
Function: Bidirectional I2C isolator
Communication Interface: I2C
Maximum I2C Clock Speed: Up to 1 MHz
Supply Voltage Range (each side): 3.0V to 5.5V
Isolation Rating: 2500 Vrms
Output Type: Open-drain
Sink Current Capability:
Side 1: 3.5 mA
Side 2: 35 mA
Transient Immunity: ±50 kV/µs (typical)
Operating Temperature Range: −40°C to +125°C
Onboard Pull-Up Resistors: 10 kΩ per side
Connectors:
STEMMA QT / Qwiic JST-SH 4-pin connectors on both sides
Breakout pads for power, ground, SDA, and SCL
Isolated sensor interfaces
Noise reduction in I2C communication
Power monitoring and industrial control systems
Mixed-voltage embedded systems
Robotics and automation projects
Educational and laboratory setups
1 x ISO1540 bidirectional I2C isolator module
Each side of the isolator must be powered separately
Verify both power LEDs are on before communication
QT cable not included
Ensure voltage levels on each side are within supported range
Specific References
Your review appreciation cannot be sent
Report comment
Report sent
Your report cannot be sent
Write your review
Review sent
Your review cannot be sent
Reference: RBD-0397
Reference: RBD-3540
Reference: RBD-4116
Reference: RBD-4151
Reference: RBD-4162
Reference: RBD-1332
Reference: RBD-4117
Reference: RBD-4160
Reference: RBD-2567
Reference: RBD-3820
Reference: RBD-3046
Reference: RBD-4079
Reference: RBD-2292
Reference: RBD-3789
Brand: Waveshare
Reference: RBD-3772
Reference: RBD-0397
Reference: RBD-2292
Reference: RBD-2567
Reference: RBD-3046
Reference: RBD-1332
Reference: RBD-3540
Reference: RBD-3772
Reference: RBD-3789
Brand: Waveshare
The ISO1540 is a bidirectional I2C isolator module designed to provide full electrical isolation between two I2C bus segments. It allows safe and reliable communication between controllers and peripherals that operate on different grounds or power domains, helping reduce noise and protect sensitive electronics.
check_circle
check_circle