MAX14934 and MAX14935 Isolators

By Maxim Integrated 71

MAX14934 and MAX14935 Isolators

Maxim Integrated's MAX14934/35 is a family of four-channel, 5 kV digital isolators utilizing Maxim’s proprietary process technology. The MAX14934/35 family transfers digital signals between circuits with different power domains at ambient temperatures up to +125°C.

The MAX14934/35 family offers all three possible unidirectional channel configurations to accommodate any four-channel design including SPI, RS-232, RS-485, and large digital IO modules.

Devices are available with data rates from DC up to 1 Mbps, 25 Mbps, or 150 Mbps. Each device is also available in either a default high or default low configuration. The default is the state an output goes to when its input is unpowered. See the Ordering Information/Selector Guide in the data sheet for the suffixes associated with each option.

Independent 1.71 V to 5.5 V supplies on each side of the isolator also make the devices suitable for use as level translators.

The MAX14934/35 are available in a 16-pin wide body (10.3 mm x 7.5 mm) SOIC package. All devices are rated for operation at ambient temperatures of -40°C to +125°C.

Key Features
  • Robust galvanic isolation of digital signals
    • Withstands 5 kVRMS for 60 s (VISO)
    • Continuously withstands 848 VRMS (VIOWM)
    • 1200 VP repetitive peak voltage (VIORM)
    • Withstands ±10 kV surge per IEC 61000-4-5
  • Many options support broad applications
    • 3 data rates (1 Mbps, 25 Mbps, 150 Mbps)
    • 3 channel direction configuration
    • 2 output default states (high or low)
  • Interfaces directly with most micros and FPGAs
    • Accepts 1.71 V to 5.5 V supplies 
  • Low power consumption at high data rates
    • At 1.8 V:
      • 2.5 mA per channel typical at 1 Mbps
      • 5.25 mA per channel typical at 100 Mbps
    • At 3.3 V:
      • 2.6 mA per channel typical at 1 Mbps
      • 7.1 mA per channel typical at 100 Mbps

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