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ISO1640 - bidirectional I2C isolator without connectors - 3-5,5V/2,25-5,5V - Pololu 5390
The Pololu I2C Isolator is a module that enables galvanic isolation of bidirectional I2C communication between two devices . It supports voltages from 3 V to 5.5 V on side 1 and from 2.25 V to 5.5 V on side 2 , providing protection against damage resulting from potential differences and incorrect connections. The module allows full bidirectionality of SDA and SCL signals, including stopping the clock.
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Product description: ISO1640 - Bidirectional I2C Isolator Without Connectors - 3 - 5.5 V / 2.25 - 5.5 V - Pololu 5390
The Pololu I2C Isolator is a compact module based on the TI ISO1640 system, which enables electrically isolated I2C communication at speeds up to 1.7 MHz . Galvanic isolation prevents current flow between the two sides of the module, protecting connected devices from damage caused by potential differences or improper power supply. The module is available in a version without connectors , with mounting holes compatible with universal contact boards and goldpin connectors with a pitch of 2.54 mm. It is ideally suited for applications requiring reliable I2C bus protection and ensuring stable communication in embedded systems and automation.
ISO1640 - bidirectional I2C isolator without connectors - 3 - 5.5 V / 2.25 - 5.5 V - Pololu 5390.
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The module enables bidirectional I2C communication.
Main features of the insulator
- Bidirectional galvanic isolation : ensures safety and electrical independence between devices
- Voltage Compatibility : Side 1 3V to 5.5V, Side 2 2.25V to 5.5V
- Full bidirectionality of SDA and SCL lines : supports clock stretching and standard I2C functions
- Transmission frequency : up to 1.7 MHz according to ISO1640B
- Mounting and connections : 0.1'' (2.54 mm) holes for installation on breadboards or with goldpin connectors
- Device protection : protection against damage caused by incorrect connections and potential differences
- Small dimensions and low weight : 10.2 x 15.2 x 2.8 mm and 0.4 g
Module pins
The module has solder holes spaced every 0.1'' (2.54 mm) allowing for connection using standard goldpin connectors or soldering wires directly. Side 1 of the module ( VCC1, GND1, SDA1, SCL1 ) and side 2 ( VCC2, GND2, SDA2, SCL2 ) are electrically independent and require a separate power supply. The pins allow easy connection to any I2C devices on both sides of the isolator.
Module pins.
The isolator has no built-in connectors.
Connection and configuration
For the module to operate correctly, each side must be powered independently: side 1 with a voltage of 3 V to 5.5 V, side 2 with a voltage of 2.25 V to 5.5 V. The SDA and SCL lines must be connected to both devices, remembering to maintain the separation of GND1 and GND2 grounds - they must not be connected directly , as the module provides galvanic isolation. The built-in 10 kΩ pull-up resistors on both sides ensure correct operation of the bus, however, for high communication speeds, external pull-up resistors can be used in parallel.
Technical specification of the insulator
- Chip: TI ISO1640B
- Side 1 Supply Voltage Range: 3 V to 5.5 V
- Side 2 Supply Voltage Range: 2.25 V to 5.5 V
- Maximum transmission frequency: 1.7 MHz
- Connectors: solder holes with 0.1'' (2.54 mm) pitch
- Dimensions: 10.2 x 15.2 x 2.8 mm
- Weight: 0.4 g
Kit Contents
- 1x ISO1640 - Bidirectional I2C Isolator Without Connectors - 3 - 5.5 V / 2.25 - 5.5 V - Pololu 5390
The module has small dimensions, making it suitable for many projects.
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).
Complaints
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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Instructions and documents
GPSR data
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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