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MAX6893ETI Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX6893ETI Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 19 page Pin-Selectable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors 8 _______________________________________________________________________________________ Pin Description (continued) PIN MAX6892 MAX6893 MAX6894 NAME FUNCTION 14 12 12 TH1 Threshold Selection Input 1. Logic input to select desired thresholds. Connect TH1 to GND or DBP. See Table 2 for available thresholds. Input has no internal pullup or pulldown. 15 13 13 TH2 Threshold Selection Input 2. Logic input to select desired thresholds. Connect TH2 to GND or DBP. See Table 2 for available thresholds. Input has no internal pullup or pulldown. 16 14 14 TH3 Threshold Selection Input 3. Logic input to select desired thresholds. Connect TH3 to GND or DBP. See Table 2 for available thresholds. Input has no internal pullup or pulldown. 17 15 15 TH4 Threshold Selection Input 4. Logic input to select desired thresholds. Connect TH4 to GND or DBP. See Table 2 for available thresholds. Input has no internal pullup or pulldown. 18 16 16 SWT Watchdog Timeout Adjust Input. Connect SWT to VCC to select the default watchdog timeout period. Connect an external capacitor between SWT and GND to adjust the watchdog timeout period. The adjustable timeout period is calculated by tWP = 4.348E6 x CSWT (tWP in seconds and CSWT in Farads). Disable the watchdog timer by connecting SWT to GND. 19 17 17 SRT Reset Timeout Adjust Input. Connect SRT to VCC to select the default reset timeout period. Connect an external capacitor between SRT and GND to adjust the reset timeout period. The adjustable timeout period is calculated by tRP = 4.348E6 x CSWT (tRP in seconds and CSRT in Farads). 20 18 18 ENABLE Active-Low, PG_ Enable Input. Pull ENABLE high to force all PG_ outputs low. PG_ outputs remain asserted for their timeout period when ENABLE is driven/pulled low. ENABLE is internally pulled down to GND through a 10µA current sink. 21 19 19 VCC Internal Supply Voltage. Bypass VCC to GND with a 1µF capacitor as close to the device as possible. VCC supplies power to the internal circuitry. VCC is internally powered from the highest of the monitored IN2–IN5 voltages. Do not use VCC to supply power to external circuitry. To externally supply VCC, see the Powering the MAX6892/MAX6893/MAX6894 section). 22 20 20 DBP Digital Bypass Voltage. DBP supplies power to the output stages. Bypass DBP to GND with a 1µF capacitor as close to the device as possible. Do not use DBP to supply power to external circuitry. 23 — — IN8 Input Voltage 8. Select undervoltage threshold using TH0–TH4. See Table 2. For improved noise immunity, bypass IN8 to GND with a 0.1µF capacitor as close to the device as possible. 24 — — IN7 Input Voltage 7. Select undervoltage threshold using TH0–TH4. See Table 2. For improved noise immunity, bypass IN7 to GND with a 0.1µF capacitor as close to the device as possible. |
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