Optii Technical Specification
The I2C Galvanic Isolation/Level Shifter Optii has two Mini-DIN connectors for the connection of the two I2C buses. The figure shows the pin assignment of the male connector
Mechanical Data (these values may differ)
- Height: 28 mm
- Width: 42 mm
- Length: 68 mm
- Material: blue plastic housing
- Weight: 50 g
Absolute Maximum Ratings
|Supply Voltage (Vcc)||-0.5 V to 6.0 V|
|Input Voltage I2C-lines||Vcc|
|Temperature Range||0 °C to +40 °C|
|Sink Current (on Line)||200 mA|
|Isolation Voltage||2500 V|
Warning: Stresses beyond those listed may cause permanent damage to the device!
Power Supply Characteristics
|Power Mode Switch Voltage||–||2.5||–||V|
|Power Mode Switching Hysteresis||–||600||–||mV|
|Power Dissipation (one Bus)||40||–||100||mW|
|Max. Transfer Speed||0||–||800||kHz*|
*) Accelerated Fast Mode (Fast Mode ist specified with 400 kbit/s only). This means that boosting, as specified for High-Speed Modes above 400 kbit/s, is not supported.
**) This is the delay between the detection of an active external device and the activation of the appropriate transducer on the other bus. The overall propagation delay depends on the bus capacity and the pull-up resistors.
|Logic High Input Threshold||–||0.85||–||V|
|Logic Low Input Threshold||–||0.4||–||V|
|Logic High Output Voltage||–||–||Vcc||V|
|Logic Low Output Voltage||–||–||100||mV|
Figure 2 shows Optii’s internal reference voltage for both power modes.
Figure 3 shows the remaining voltage if Optii pulls down an I2C line in dependency of the pull-up resistor Rp.
The necessary supply current for proper operation in dependency of the supply voltage is shown in Figure 4. This is the current for a single bus only.
The typical power dissipation of a single bus is shown in Figure 5.