Overview
The ISO1644DWR 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 ISO1644DWR integrates three unidirectional CMOS isolation channels, making it suitable for static GPIO isolation or isolating a Serial Peripheral Interface (SPI) bus. It features a double capacitive silicon dioxide (SiO₂) insulation barrier, providing high isolation ratings and enhanced electromagnetic compatibility (EMC).
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Rating | Catalog | Isolation rating | Reinforced |
| Number of channels | 5 | Serial data | Bidirectional |
| Serial clock | Bidirectional | Data rate (max) (MBps) | 1.7 |
| Working isolation voltage (VIOWM) (Vrms) | 1500 | Surge isolation voltage (VIOSM) (VPK) | 10000 |
| Transient isolation voltage (VIOTM) (VPK) | 7071 | Withstand isolation voltage (VISO) (Vrms) | 5000 |
| CMTI (min) (kV/µs) | 50 | Supply voltage (max) (V) | 5.5 |
| Supply voltage (min) (V) | 2.25 |
Key Features
- Robust isolated bidirectional, I²C compatible communication
- Bidirectional data transfer up to 1.7 MHz operation
- Up to 3 additional unidirectional isolated GPIO channels supporting 50 Mbps speed
- Hot-swappable SDA and SCL
- Robust isolation barrier with enhanced EMC: >100-year projected lifetime at 450 V RMS working voltage (D-8) and 1500 V RMS working voltage (DW-16)
- 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 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)
- 16-SOIC (DW-16) package option
- Operating temperature range: –40°C to +125°C
Applications
The ISO1644DWR is suitable for various applications requiring reliable and isolated communication, including:
- Industrial automation and control systems
- Medical devices requiring high isolation and safety standards
- Automotive systems where robust EMC is crucial
- Consumer electronics needing isolated GPIO and SPI interfaces
- Any system requiring hot-swappable, low-power, and bidirectional I²C communication
Q & A
- Q: What is the ISO1644DWR and its primary function?
A: The ISO1644DWR is a hot-swappable, robust-EMC bidirectional I²C isolator from Texas Instruments, designed for reliable and isolated communication in various applications.
- Q: What are the key features of the ISO1644DWR?
A: Key features include bidirectional I²C communication, hot-swappable SDA and SCL, up to 3 additional unidirectional isolated GPIO channels, and robust isolation with enhanced EMC.
- Q: What is the isolation rating of the ISO1644DWR?
A: The ISO1644DWR has a reinforced isolation rating of up to 5000 V RMS per UL1577 and up to 10 kV reinforced surge capability.
- Q: What is the operating temperature range of the ISO1644DWR?
A: The operating temperature range is –40°C to +125°C.
- Q: How many GPIO channels does the ISO1644DWR support?
A: The ISO1644DWR supports up to 3 additional unidirectional isolated GPIO channels.
- Q: What is the maximum data rate supported by the ISO1644DWR?
A: The maximum data rate is up to 1.7 MHz for I²C communication and 50 Mbps for GPIO channels.
- Q: What are the safety certifications for the ISO1644DWR?
A: The device is certified under various safety standards including UL 1577, DIN VDE V 0884-11, IEC 62368-1, IEC 61010-1, IEC 60601-1, and GB4943.1-2011.
- Q: How can I order the ISO1644DWR?
A: You can order the ISO1644DWR through various distributors like Ovaga, Mouser, or directly from Texas Instruments' website by selecting the product and proceeding to the checkout page.
- Q: What is the warranty period for the ISO1644DWR?
A: Ovaga offers a 1-year warranty on the ISO1644DWR, covering any defects in materials and workmanship under normal use.
- Q: How can I contact support for technical inquiries or datasheets?
A: For any after-sales support or technical inquiries, you can contact the distributor's support team via email or through the manufacturer's support channels.
