TI ISO1640BDR

Both the ISO1640 and ISO1641 (ISO164x) devices are low-power bidirectional hot-swap isolators compatible with the I²C interface. The ISO164x complies with the UL 1577 standard, supporting an isolation rating of 5000V RMS in a 16-DW package and 3000V RMS in an 8-D package. Each isolation channel of this low-radiation device features a logic input and an open-drain output isolated by a dual-capacitor silicon dioxide (SiO₂) insulation gate. The series includes basic and enhanced isolation rating devices that have been certified by VDE, UL, CSA, TUV, and CQC. The ISO1640 has two isolated bidirectional channels for the clock and data lines respectively, while the ISO1641 has one bidirectional data channel and one unidirectional clock channel. The ISO164x series integrates the logic required for bidirectional channels, offering a simpler design and a smaller size compared to optocoupler-based solutions.

• Reliable isolated bidirectional I²C-compatible communication
  • ISO1640: Isolated bidirectional SDA and SCL communication
  • ISO1641: Bidirectional SDA and unidirectional SCL communication
  • Hot-plug SDA and SCL
• Bidirectional data transfer up to 1.7MHz
• Robust isolation barrier with enhanced EMC:
  • Projected lifetime exceeding 100 years at 450V RMS working voltage (D - 8) and 1500V RMS working voltage (DW - 16)
  • Isolation rating up to 5000V RMS
  • Surge capability up to 10kV (reinforced)
  • Typical CMTI of ±100kV/μs
  • ±8kV IEC ESD 61000-4-2 contact discharge protection across the entire isolation barrier
  • ±8kV IEC ESD unpowered contact discharge on SCL2 and SDA2 (side 2) on the same side
• Supply voltage range: 3V to 5.5V (side 1); 2.25V to 5.5V (side 2)

• Isolated I²C bus
• SMBus and PMBus interfaces
• Power over Ethernet (PoE)
• Motor control systems
• Battery management