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Figure 2. CMOS Isolator Block Diagram
Table 1. CMOS Digital Isolator Operation returns to the same state as VI in less than 1 µs. returns to the same state as VI within 1 µs.
- VDDI and VDDO are the input and output power supplies. VI and VO are the respective input and output terminals.
- X = not applicable; H = Logic High; L = Logic Low; Hi-Z = High Impedance.
- “Powered” state (P) is defined as 2.5 V < VDD < 5.5 V.
- “Unpowered” state (UP) is defined as VDD = 0 V.
master a way to distinguish between an incorrect baud rate and an unpowered Si8900 slave. the operation of the Si8901 I2C port, see the Si890x data sheet available at www.silabs.com/isolation. Table 2. Si8900 Power Fail Behavior
trying to establish communication or service other unrelated tasks and return later to attempt communication. Table 3. Si8901 Power Fail Behavior Table 4. Si8902 Power Fail Behavior
Rev. 0.1 7 NOTES:
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