upc1555 Renesas Electronics Corporation., upc1555 Datasheet - Page 6

• Manufacturer Part Number: upc1555
• Description: Timer Circuit
• Manufacturer: Renesas Electronics Corporation.

PIN FUNCTIONS
1. Trigger pin (pin 2)
2. Output pin (pin 3)
3. Reset pin (pin 4)
4. Control voltage (pin 5) : This voltage determines the threshold level of the comparator. It is set to two-thirds
5. Threshold pin (pin 6)
6. Discharge pin (pin 7)
6
: Supplying one-third of V
: The maximum output current is 200 mA. Be careful not to exceed the total loss (see
: Supplying 0.4 V or less to the reset pin stops the circuit operation (such as monostable
: The values of an external capacitor (C) and resistor (R) connected to this pin determine
: This pin is used to discharge an external capacitor (if connected). It operates, when
voltage from low to high.
the P
or astable multivibrator operation).
When not used, the reset pin should be clamped at 1 V to V
of V
position modulation) mode application circuit by supplying a control voltage from the
outside. When this pin is not in use, it should be bypassed using a capacitor of
approximately 0.01 F for more table circuit operation.
the width of the output pulse.
the internal flip-flop circuit is turned on, or a reset signal is applied.
CC
T
-T
. It is possible to configure a PWM (pulse width modulation) or PPM (pulse
A
characteristic curve).
CC
to the trigger pin triggers the circuit, changing the output
CC
.
PC1555