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ISO1640 - bidirectional I2C isolator with isolated power supply - JST SH 4-pin - 5V/3,3V, 200mA - Pololu 5393
The Pololu I2C Isolator with Isolated Power Supply and Connectors enables galvanically isolated, bidirectional I2C communication between two devices, while providing a stable, isolated 5V or 3.3V power supply at up to 200mA . Compact and compatible with Qwiic and STEMMA QT systems, it ensures reliability and protection of systems from damage.
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Product description: ISO1640 - Bidirectional I2C Isolator with Isolated Power Supply - JST SH 4-pin - 5V/3.3V, 200mA - Pololu 5393
Pololu I2C isolator with galvanic signal isolation and separated power supply, based on TI ISO1640 , allows for safe, bidirectional I2C communication between two devices. It supports SDA and SCL signals with clock stretching. Additionally, the module provides isolated and regulated 5 V (default) or 3.3 V power supply, which can be selected using the VSEL pin. Isolation protects against penetration of incorrect voltages and protects connected devices from damage. The module is equipped with JST SH 4-pin connectors compatible with Sparkfun Qwiic and Adafruit STEMMA QT systems , which makes integration with popular platforms easy.
ISO1640 - bidirectional I2C isolator with isolated power supply - JST SH 4-pin - 5V/3.3V, 200mA - Pololu 5393.
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The module enables bidirectional communication between two I2C devices.
Main features of the insulator
- Galvanic signal isolation : ensures safe separation of SDA and SCL lines between devices
- Bidirectional I2C communication : supports SDA and SCL signals with clock stretching function
- Adjustable output voltage : 5V default, selectable 3.3V via VSEL pin
- Separated power supply : stable output voltage up to 200 mA at 5 V or 75 mA at 3.3 V
- Wide input voltage range : 3 V to 5.5 V
- Temperature and short circuit protection : protects the module from damage
- Compact dimensions : 12.7 x 15.24 x 7.1 mm, weight 0.7 g
- JST SH 4-pin connectors : compatible with Qwiic and STEMMA QT for easy connection and replacement of devices
Module pins
The module has two separate power supplies : input (VCCIN, GND1) and output (VCCOUT, GND2), which are galvanically isolated . The VSEL pin allows you to select the output voltage (5 V by default or 3.3 V when connected to GND2). The SDA1 and SCL1 inputs connect to the I2C bus of the first device, and SDA2 and SCL2 from the second . The EN pin allows you to turn the module on and off, and the internal 10 kΩ pull-up resistors ensure signal stability.
Module pins.
Connection and configuration
For correct connection, the module input must be powered via VCCIN and GND1 with a voltage from 3 V to 5.5 V. Isolated output is obtained on VCCOUT and GND2 pins. The VSEL pin remains unconnected (floating) for 5 V or connects to GND2 if 3.3 V operation is required. The I2C buses are connected to SDA and SCL on both sides of the isolator . The EN pin is pulled up to VCCIN by default and can be used to turn the module off, which limits current consumption. For higher communication speeds, additional external pull-up resistors can be used.
Technical specification of the insulator
- Chip: TI ISO1640B
- Isolated Power Supply: MPS MIE1W0505BGLVH
- Input voltage range: 3V to 5.5V
- Output voltage: 5V (default) or 3.3V (switchable)
- Maximum Output Current: 200 mA (peak), 180 mA (continuous) at 5 V; 75 mA at 3.3 V
- Maximum transmission frequency: up to 1.7 MHz
- Connectors: JST SH 4-pin compatible with Qwiic and STEMMA QT
- Protection: against overheating and short circuit
- Galvanic Isolation: Up to 3kVRMS for signal and 2.5kVRMS for power supply
- Mounting: solder holes with a 2.54 mm pitch, compatible with breadboards
- Dimensions: 12.7 x 15.24 x 7.1 mm
- Weight: 0.7 g
Kit Contents
- 1x ISO1640 - Bidirectional I2C Isolator with Isolated Power Supply - JST SH 4-pin - 5V/3.3V, 200mA - Pololu 5393
Cables are not included and must be purchased separately.
Useful links
| Name | Value |
|---|---|
| Width | 10 cm |
| Height | 6 cm |
| Depth | 1 cm |
| Weight | 0.002 kg |
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30 days to return, without giving a reason
If the product does not meet your expectations, you have 30 days from receiving the parcel to withdraw from the contract. The product only has to be complete. The right of return belongs to consumers (a purchase unrelated to business activity).
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If the product turns out to be faulty, you can make a claim under the guarantee or the statutory warranty. We handle claims without delay, at the latest within 14 working days of receiving the report together with the goods.
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Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
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