SKYWORKS SI8400AB-B-IS

The Si840x series of isolators are single-package galvanic isolation solutions for I²C and SMBus serial port applications. These products offer shorter propagation delays, lower power consumption, smaller installed size, and more stable operation with temperature and age versus opto couplers or other digital isolators.

All devices in this family include hot-swap, bidirectional SDA and SCL isolation channels with open-drain, 35 mA sink capability and operate to a maximum frequency of 1.7 MHz. The 8-pin version (Si8400/01) supports bidirectional SDA and SCL isolation; the Si8402 supports bidirectional SDA and unidirectional SCL isolation, and the 16-pin version (Si8405) features two unidirectional isolation channels to support additional system signals, such as an interrupt or reset. All versions contain protection circuits to guard against data errors if an unpowered device is inserted into a powered system.

Small size, low installed cost, low power consumption, and short propagation delays make the Si840x family the optimum solution for isolating I²C and SMBus serial ports.

• Independent, bidirectional SDA and SCL isolation channels
• 60-year life at rated working voltage
• High electromagnetic immunity
• Open drain outputs with 35 mA sink current
• Supports I²C clocks up to 1.7 MHz
• Unidirectional isolation channels support additional system signals
• Wide operating supply voltage: 3.0 to 5.5 V
• Wide temperature range: -40 to +125 °C max
• Transient immunity 25 kV/μs (Si8405)
• RoHS-compliant packages: SOIC-8 narrow body, SOIC-16 narrow body
• Up to 2500 V RMS isolation
• UL, CSA, VDE recognition

• Isolated I²C, SMBus
• Isolated digital power supply communications
• Power over Ethernet
• Motor Control Systems
• Hot-swap applications
• Intelligent Power systems