Overview
The ISO1640DWR from Texas Instruments is a robust, hot-swappable, bidirectional I2C isolator designed to provide reliable and high-speed communication across isolated domains. This device is part of the ISO164x family, which integrates the necessary logic for bidirectional I2C communication, simplifying design and reducing footprint compared to optocoupler-based solutions. The ISO1640DWR supports bidirectional data transfer up to 1.7 MHz and features enhanced electromagnetic compatibility (EMC) and safety certifications.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage (VCC1, VCC2) | -0.5 | 6 | V |
| Input/Output Voltage (SDA1, SCL1, SDA2, SCL2) | -0.5 | VCCX + 0.5 | V |
| Input/Output Current (SDA1, SCL1) | 0 | 20 | mA |
| Input/Output Current (SDA2, SCL2) | 0 | 100 | mA |
| Maximum Junction Temperature (TJ) | - | 150 | °C |
| Storage Temperature (Tstg) | -65 | 150 | °C |
| Operating Temperature Range | -40 | 125 | °C |
| Isolation Rating (UL 1577) | - | 5000 | VRMS |
| Maximum Transient Isolation Voltage | - | 7071 | VPK |
| Package Type | - | SOIC-16 (DW-16) | - |
Key Features
- Robust isolated bidirectional I2C communication with hot-swappable capability
- Bidirectional data transfer up to 1.7 MHz
- Up to 3 additional unidirectional isolated GPIO channels supporting 50 Mbps speed
- Robust isolation barrier with enhanced EMC:
- >100-year projected lifetime at 450 VRMS working voltage (D-8) and 1500 VRMS working voltage (DW-16)
- Up to 5000 VRMS isolation rating per UL1577
- Up to 10 kV reinforced surge capability
- ±100 kV/μs typical CMTI
- ±8 kV IEC-ESD 61000-4-2 contact discharge protection across isolation barrier
- Supply range: 3 V to 5.5 V (Side 1) and 2.25 V to 5.5 V (Side 2)
- Open-drain outputs with 3.5-mA (Side 1) and 50-mA (Side 2) current-sink capability
- Max capacitive load: 80 pF (Side 1) and 400 pF (Side 2)
- Safety-related certifications: UL 1577, DIN VDE V 0884-11, IEC 62368-1, IEC 61010-1, IEC 60601-1, and GB4943.1-2011
Applications
- Isolated I2C Buses
- Isolated I2C and SPI Buses
- SMBus and PMBus Interfaces
- Power Over Ethernet (PoE)
- Motor Control Systems
- Battery Management
Q & A
- What is the primary function of the ISO1640DWR?
The ISO1640DWR is a bidirectional I2C isolator designed to provide isolated communication between two domains while supporting hot-swappable operation.
- What is the maximum data transfer rate of the ISO1640DWR?
The ISO1640DWR supports bidirectional data transfer up to 1.7 MHz.
- What are the supply voltage ranges for the ISO1640DWR?
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 ISO1640DWR?
The ISO1640DWR has an isolation rating of up to 5000 VRMS per UL1577.
- What are the safety certifications for the ISO1640DWR?
The device is certified according to UL 1577, DIN VDE V 0884-11, IEC 62368-1, IEC 61010-1, IEC 60601-1, and GB4943.1-2011.
- What is the maximum junction temperature for the ISO1640DWR?
The maximum junction temperature is 150°C.
- What is the operating temperature range for the ISO1640DWR?
The operating temperature range is -40°C to +125°C.
- What is the package type of the ISO1640DWR?
The ISO1640DWR is available in a SOIC-16 (DW-16) package.
- Does the ISO1640DWR support additional GPIO channels?
Yes, the ISO1640DWR can be part of a family that includes devices with up to 3 additional unidirectional isolated GPIO channels.
- What is the typical CMTI of the ISO1640DWR?
The typical common-mode transient immunity (CMTI) is ±100 kV/μs.
