XC612_1 Datasheet, PDF (6/14 Pages) Torex Semiconductor – 2-Channel Voltage Detectors

XC612 Series
■OPERATONAL EXPLANATION
●Timing Chart (Pull up voltage =Input voltage VIN1)
●Operational Notes (N-ch Open drain)
Timing Chart A (VIN1=voltages above release voltage, VIN2=sweep voltage)
Because a voltage higher than the minimum operating voltage is applied to the voltage input pin (VIN), ground voltage will be
output at the output pin (VDET) during stage 3. (Stages 1, 2, 4, 5 are the same as in B below).
Timing Chart B (VIN1=VIN2)
① When a voltage greater than the release voltage (VDR) is applied to the voltage input pin (VIN1, VIN2), input voltage (VIN1,
VIN2) will gradually fall.
When a voltage greater than the detect voltage (VDF) is applied to the voltage input pin (VIN1, VIN2), a state of high
impedance will exist at the output pin (VDET1, VDET2), so should the pin be pulled up, voltage will be equal to pull up
voltage.
② When input voltage (VIN1, VIN2) falls below detect voltage (VDF), output voltage (VDET1, VDET2) will be equal to ground
level (VSS).
③ Should input voltage (VIN1, VIN2) fall below the minimum operational voltage (VMIN), output will become unstable. Should
VIN2 fall below VMIN, voltage at the output pin (VDET2) will be equal to ground level (VSS) if the power supply (VIN1) is
within the operating voltage range.
*In general the output pin is pulled up so output will be equal to pull up voltage.
④ Should input voltage (VIN1, VIN2) rise above ground voltage (VSS), output voltage (VDET1, VDET2) will equal ground level
until the release voltage level (VDR) is reached.
⑤ When input voltage (VIN1, VIN2) rises above release voltage, the output pin's (VDET1, VDET2) voltage will be equal to the
voltage dependent on pull up.
Note : The difference between release voltage (VDR) and detect voltage (VDF) is the Hysteresis Range ⑥.
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