XC612_1 Datasheet, PDF (7/14 Pages) Torex Semiconductor – 2-Channel Voltage Detectors

XC612
Series
■NOTES ON USE
1. Please use this IC within the specified maximum absolute ratings.
2. Please ensure that input voltage VIN2 is less than VIN1 + 0.3V. (refer to N.B. 1 below)
3. With a resistor connected between the VIN1 pin and the input, oscillation is liable to occur as a result of through current at
the time of release. (refer to N.B. 2 below)
4. With a resistor connected between the VIN1 pin and the input, detect and release voltage will rise as a result of the IC's
supply current flowing through the VIN1 pin.
5. In order to stabilize the IC's operations, please ensure that the VIN1 pin's input frequency's rise and fall times are more
than 5 msec/V.
6. Should the power supply voltage VIN1 exceed 6V, voltage detector 2's detect voltage (VDF2) and the release voltage
(VDR2) will shift somewhat.
7. For CMOS output products, high level output voltage which is generated when the transient response is released
becomes input voltage of VIN.
●N.B.
1. Voltage detector 2's input voltage (VIN2)
An input protect diode is connected from input detector 2's input (VIN2) to input detector 1's input. Therefore, should the
voltage applied to VIN2 exceed VIN1, current will flow through VIN1 via the diode. (refer to diagram1)
2. Oscillation as a result of through current
Since the XC612 series are CMOS ICs, through current will flow when the IC's internal circuit switching operates
(during release and detect operations). Consequently, oscillation is liable to occur as a result of drops in voltage at the
through current's resistor (RIN) during release voltage operations. (refer to diagram 2)
Since hysteresis exists during detect operations, oscillation is unlikely to occur.
Diagram 1. Voltage detector 2's input voltage VIN2
Diagram 2. Through current oscillation
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