XC6109
Series
■NOTES
ON USE
1. Use this IC within the stated maximum ratings. Operation beyond these limits may cause degrading or permanent
damage to the device.
2. The input pin voltage drops by the resistance between power supply and the V
IN
pin, and by through current at
operation of the IC.
At this time, the operation may be wrong if the input pin voltage falls below the minimum operating
Oscillation of the
voltage range. In CMOS output, for output current, drops in the input pin voltage similarly occur.
voltage. Note it especially when you use the IC with the V
IN
pin connected to a resistor.
3. Note that a rapid and high fluctuation of the input pin voltage may cause a wrong operation.
4. When there is a possibility of which the input pin voltage falls rapidly (e.g.: 6.0V to 0V) at release operation with the
delay capacitance pin (Cd) connected to a capacitor, use a schottky barrier diode connected between the V
IN
pin and
the Cd pin as the Figure 3 shown below.
5. When N-ch open drain output is used, output voltages V
OUT
at voltage detection and release are determined by a
pull-up resistor tied to the output pin. A resistance value of the pull-up resistor can be selected with referring to the
followings. (Refer to Figure 4)
During detection, the formula is given as
V
OUT
=Vpull/(1+Rpull/R
ON
)
where Vpull is pull-up voltage and R
ON
(*1) is ON resistance of N-ch driver M5 (R
ON
=V
DS
/I
OUT1
from the electrical
characteristics table).
For example, when V
IN
=2.0V (*2), R
ON
= 0.5/0.8×10
-3
=625Ω(MIN.) and if you want to get V
OUT
less than 0.1V when
Vpull=3.0V, Rpull can be calculated as follows;
Rpull=(Vpull /V
OUT
-1)×R
ON
=(3/0.1-1)×625≒18�½�Ω
Therefore, pull-up resistance should be selected 18kΩ or higher.
(*1) V
IN
is smaller, R
ON
is bigger
(*2) For the calculation, the lowest V
IN
should be used among of the V
IN
range
During release, the formula is given as
V
OUT
=Vpull/(1+Rpull/Roff)
where Vpull is pull-up voltage Roff is OFF resistance of N-ch driver M5 (Roff=V
OUT
/I
LEAK
=15MΩ from the
electrical characteristics table)
For examples, if you want to get V
OUT
larger than 5.99V when Vpull is 6.0V, Rpull can be calculated as follows;
6
Rpull=(Vpull/V
OUT
-1)×Roff=(6/5.99-1)×15×10
≒25kΩ
Therefore, pull-up resistance should be selected 25kΩ or below.
circuit may occur if the drops in voltage, which caused by through current at operation of the IC, exceed the hysteresis
(No resistor needed
for CMOS output
products)
Note: Roff=V
OUT
/I
LEAK
Figure 3: Circuit example with the delay capacitance pin
(Cd) connected to a schottky barrier diode
Figure 4: Circuit example of
XC6109N Series
9/14
TOREX [ TOREX SEMICONDUCTOR ]
