Analog Devices Inc. ADuM1253 Ultra-Low-Power I2C Digital Isolators offer two open-drain channels, one unidirectional and one bidirectional. This two-channel design targets applications such as I2C that require data to be transmitted in both directions on the same line but have a unidirectional clock. To prevent latch-up action, Side 1 outputs comprise special buffers that regulate the logic-low voltage at 0.64V, and the input logic-low threshold is at least 50mV lower than the output logic-low voltage. Side 2 features conventional buffers that do not regulate logic-low output voltage. ADuM1253 is rated for operation at ambient temperatures within -40°C to +125°C and packaged in an 8-pin narrow SOIC package.
