MAX14937 Datasheet

• Robust Galvanic Isolation of Digital Signals
  • Withstands 5kV_RMS for 60s (V_ISO)
  • Continuously Withstands 848VRMS (V_IOWM)
  • 1200V_PEAK Repetitive Peak Voltage (V_IORM)
  • Withstands ±10kV Surge per IEC 61000-4-5
• Interfaces Directly with Most Micros and FPGAs
  • Accepts 2.25V to 5.5V Supplies
  • Bidirectional Data Transfer from DC to 1.7MHz
• Low Power Consumption
  • 5.3mA per Channel Typical at 1.7MHz

• I²C, SMBus, PMBus™ Interfaces
• Power Supplies
• Battery Management
• Instrumentation

The MAX14937 is a two-channel, 5kV_RMS I²C digital isolator utilizing Maxim’s proprietary process technology. For applications requiring 2.75kV_RMS of isolation, see the MAX14933 data sheet. The device transfers digital signals between circuits with different power domains at ambient temperatures up to +125°C.

The device offers two bidirectional, open-drain channels for applications, such as I²C, that require data to be transmitted in both directions on the same line. To prevent latchup action, the A-side outputs comprise special buffers that regulate the logic-low voltage at 0.9V (max), and the input logic-low threshold is at least 50mV lower than the output logic-low voltage. The B side features conventional buffers that do not regulate logic-low output voltage.

The device features independent 2.25V to 5.5V supplies on each side of the isolator. The MAX14937 operates from DC to 1.7MHz and can be used in isolated I²C busses with clock stretching.

The MAX14937 is available in a 16-pin, wide-body (10.3mm x 7.5mm) SOIC package, and is rated for operation at ambient temperatures of -40°C to +125°C.