9/16
XC6119
Series
■NOTES ON USE
Figure 3: Circuit example with the delay capacitance pin (Cd)
connected to a schottky barrier diode
1. Please use this IC within the stated maximum ratings. For temporary, transitional voltage drop or voltage rising
phenomenon, the IC is liable to malfunction should the ratings be exceeded.
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 voltage range.
In CMOS output, for output current, drops in the input pin voltage similarly occur. Oscillation of the circuit may occur if the
drops in voltage, which caused by through current at operation of the IC, exceed the hysteresis 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. Power supply noise may cause an operational function error. Care must be taken to put an external capacitor between
V
IN
-GND and test on the board carefully.
5. 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.
6. When N-channel 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
=V
PULL
/(1+R
PULL
/R
ON
)
where V
PULL
is pull-up voltage and R
ON
(*1) is ON resistance of N-channel 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
V
PULL
=3.0V, R
PULL
can be calculated as follows;
R
PULL
=(V
PULL
/V
OUT
-1)×R
ON
=(3/0.1-1)×625≒18kΩ
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
=V
PULL
/(1+R
PULL
/R
OFF
)
where V
PULL
is pull-up voltage R
OFF
is OFF resistance of N-channel driver M5 (R
OFF
=V
OUT
/I
LEAK
=15MΩ from the
electrical characteristics table)
For examples, if you want to get V
OUT
larger than 5.99V when V
PULL
is 6.0V, R
PULL
can be calculated as follows;
R
PULL
=(V
PULL
/V
OUT
-1)×R
OFF
=(6/5.99-1)×15×10
6
≒25kΩ
Therefore, pull-up resistance should be selected 25kΩ or below.
7. Torex places an importance on improving our products and their reliability. We request that users incorporate fail-safe
designs and post-aging protection treatment when using Torex products in their systems.
Note: R
OFF
=V
OUT
/I
LEAK
Figure 4: Circuit example of XC6109N Series
(No resistor needed for
CMOS output products)