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SI8660BA-B-IS1 Datasheet(PDF) 24 Page - Silicon Laboratories |
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SI8660BA-B-IS1 Datasheet(HTML) 24 Page - Silicon Laboratories |
24 / 40 page ![]() 24 Rev. 1.5 Si8660/61/62/63 3. Device Operation Device behavior during start-up, normal operation, and shutdown is shown in Figure 8, where UVLO+ and UVLO- are the positive-going and negative-going thresholds respectively. Refer to Table 12 to determine outputs when power supply (VDD) is not present. Table 12. Si866x Logic Operation VI Input1,2 VDDI State1,3,4 VDDO State1,3,4 VO Output 1,2 Comments HP P H Normal operation. LP P L X5 UP P L6 H6 Upon transition of VDDI from unpowered to powered, VO returns to the same state as VI in less than 1 µs. X5 P UP Undetermined Upon transition of VDDO from unpowered to powered, VO returns to the same state as VI within 1 µs. Notes: 1. VDDI and VDDO are the input and output power supplies. VI and VO are the respective input and output terminals. 2. X = not applicable; H = Logic High; L = Logic Low; Hi-Z = High Impedance. 3. “Powered” state (P) is defined as 2.5 V < VDD < 5.5 V. 4. “Unpowered” state (UP) is defined as VDD = 0 V. 5. Note that an I/O can power the die for a given side through an internal diode if its source has adequate current. 6. See "5. Ordering Guide" on page 30 for details. This is the selectable fail-safe operating mode (ordering option). Some devices have default output state = H, and some have default output state = L, depending on the ordering part number (OPN). For default high devices, the data channels have pull-ups on inputs/outputs. For default low devices, the data channels have pull-downs on inputs/outputs. |
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