TC1270A MICROCHIP [Microchip Technology], TC1270A Datasheet - Page 16

• Manufacturer Part Number: TC1270A
• Description: Voltage Supervisor with Manual Reset Input
• Manufacturer: MICROCHIP [Microchip Technology]

TC1270A/70AN/71A
3.1
V
input voltage. Typically, the circuit ground is used.
3.2
V
voltage level that requires monitoring.
3.3
There are three types of Reset output pins. These are:
1.
2.
3.
3.3.1
The RST push-pull output remains low while V
below the reset voltage threshold (V
the RST pin is held low after the device voltage (V
returns to a high level (> V
After the Reset delay timer expires, the RST pin will be
driven to the high state.
3.3.2
The RST push-pull output remains high while V
below the reset voltage threshold (V
the RST pin is held high after the device voltage (V
returns to a high level (> V
After the Reset delay timer expires, the RST pin will be
driven to the low state.
3.3.3
The RST open-drain output remains low while V
below the reset voltage threshold (V
the RST pin is held low after the device voltage (V
returns to a high level (> V
Timeout selected. After the Reset Delay Timer expires,
the RST pin will float.
DS22035B-page 16
SS
DD
Push-Pull active-low Reset
Push-Pull active-high Reset
Open-Drain active-low Reset, External pull-up
resistor required.
provides the negative reference for the analog
can be used for power supply monitoring or a
Ground Terminal (V
Supply Voltage (V
Reset Output (RST and RST)
ACTIVE-LOW (RST) - PUSH-PULL
ACTIVE-HIGH (RST) - PUSH-PULL
ACTIVE-LOW (RST) - OPEN-DRAIN
TRIP
TRIP
TRIP
) depends on the Reset
DD
) is typically 280 ms.
) is typically 280 ms.
SS
TRIP
TRIP
TRIP
)
)
). The time that
). The time that
). The time that
DD
DD
DD
DD
DD
DD
is
is
is
)
)
)
3.4
The Manual Reset (MR) input pin allows a push button
switch to easily be connected to the system. When the
push button is depressed, it forces a system Reset.
This pin has circuitry that filters noise that may be
present on the MR signal.
The MR pin is active-low and has an internal pull-up
resistor.
Manual Reset Input (MR)
© 2007 Microchip Technology Inc.