MAX14937

Two Channel, 5kVRMS I2C Isolator

Industry's Most Flexible Digital Isolators Allow Direct Interfacing to Low-Voltage (2.5V) Devices


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Description

The MAX14937 is a two-channel, 5kVRMS I2C digital isolator utilizing Maxim’s proprietary process technology. For applications requiring 2.75kVRMS 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.

MAX14937: Functional Diagram MAX14937: Functional Diagram Enlarge+

Key Features

  • Robust Galvanic Isolation of Digital Signals
    • Withstands 5kVRMS for 60s (VISO)
    • Continuously Withstands 848VRMS (VIOWM)
    • 1200VPEAK Repetitive Peak Voltage (VIORM)
    • 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

Applications/Uses

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

See parametric specs for Digital Isolators (75)


Part NumberChannelsBi-directional ChannelsBi-directional Data Rate
(Mbps)
max
MAX14937 223.4

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX14933WEVKIT: Evaluation Kit for the MAX14933/MAX14937
MAX14937WEVKIT: Evaluation Kit for the MAX14933/MAX14937
Product Reliability Reports: MAX14937.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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