Overview
The ISO1641BDR from Texas Instruments is a hot-swappable, robust-EMC bidirectional I2C isolator. This device is part of the ISO164x family, which includes low-power, bidirectional isolators compatible with I2C interfaces. The ISO1641BDR specifically features bidirectional data (SDA) and unidirectional clock (SCL) communication channels. It is designed to provide robust isolation with enhanced electromagnetic compatibility (EMC) and is suitable for various applications requiring isolated I2C communication.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D-8) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage (Side 1) | 3 V to 5.5 V | V |
| Supply Voltage (Side 2) | 2.25 V to 5.5 V | V |
| Isolation Rating | 3000 V RMS | V RMS |
| Surge Isolation Voltage | 5000 V PK | V PK |
| Common Mode Transient Immunity (CMTI) | ±100 kV/µs | kV/µs |
| ESD Protection | ±8 kV IEC-ESD 61000-4-2 contact discharge | - |
| Maximum Frequency | Up to 1.7 MHz | MHz |
| Max Capacitive Load (Side 1) | 80 pF | pF |
| Max Capacitive Load (Side 2) | 400 pF | pF |
Key Features
- Robust isolated bidirectional I2C communication with bidirectional SDA and unidirectional SCL channels.
- Hot-swappable SDA and SCL channels.
- Bidirectional data transfer up to 1.7 MHz operation.
- Up to 3 additional unidirectional isolated GPIO channels supporting 50 Mbps speed.
- Robust isolation barrier with enhanced EMC, including >100-year projected lifetime at 450 V RMS working voltage.
- Up to 5000 V RMS isolation rating per UL1577 and up to 10 kV reinforced surge capability.
- ±100 kV/µs typical CMTI and ±8 kV IEC-ESD 61000-4-2 contact discharge protection across the isolation barrier.
- Open-drain outputs with 3.5-mA (Side 1) and 50-mA (Side 2) current-sink capability.
- Safety-related certifications planned, including UL 1577, DIN VDE V 0884-11, and IEC 62368-1, among others.
Applications
- Isolated I2C buses.
- Isolated I2C and SPI buses.
- SMBus and PMBus interfaces.
- Power Over Ethernet (PoE).
- Motor control systems.
- Battery management systems.
Q & A
- What is the ISO1641BDR used for?
The ISO1641BDR is used for isolated I2C communication, providing robust EMC and bidirectional data transfer with unidirectional clock channels.
- What are the key features of the ISO1641BDR?
Key features include hot-swappable channels, bidirectional data transfer up to 1.7 MHz, and robust isolation with enhanced EMC.
- What is the operating temperature range of the ISO1641BDR?
The operating temperature range is -40°C to 125°C.
- What are the supply voltage ranges for the ISO1641BDR?
The supply voltage ranges are 3 V to 5.5 V for Side 1 and 2.25 V to 5.5 V for Side 2.
- What is the isolation rating of the ISO1641BDR?
The isolation rating is 3000 V RMS.
- Does the ISO1641BDR have ESD protection?
Yes, it has ±8 kV IEC-ESD 61000-4-2 contact discharge protection across the isolation barrier.
- What is the maximum frequency of operation for the ISO1641BDR?
The maximum frequency of operation is up to 1.7 MHz.
- What are the typical applications of the ISO1641BDR?
Typical applications include isolated I2C buses, SMBus and PMBus interfaces, Power Over Ethernet (PoE), motor control systems, and battery management systems.
- Does the ISO1641BDR support additional isolated GPIO channels?
Yes, it supports up to 3 additional unidirectional isolated GPIO channels with 50 Mbps speed.
- What safety certifications does the ISO1641BDR have?
The ISO1641BDR has planned safety-related certifications including UL 1577, DIN VDE V 0884-11, and IEC 62368-1, among others.
