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TC1270LERCTR Folha de dados(PDF) 5 Page - Microchip Technology

Nome de Peças TC1270LERCTR
Descrição Electrónicos  4-Pin Reset Monitors
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© 2007 Microchip Technology Inc.
DS21381D-page 5
TC1270/TC1271
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
3.1
Ground Terminal (GND)
GND provides the negative reference for the analog
input voltage. Typically, the circuit ground is used.
3.2
Reset Output (RESET) (TC1270)
RESET output remains low while VCC is below the
Reset voltage threshold (VTRIP). Once the device
voltage (VCC) returns to a high level (VTRIP + VHYS), the
device will remain in Reset for the Reset delay timer
(TRST). After that time expires, the RESET pin will be
driven to the high state.
3.3
Reset Output (RESET) (TC1271)
RESET output remains high while VCC is below the
Reset voltage threshold (VTRIP). Once the device
voltage (VCC) returns to a high level (VTRIP + VHYS), the
device will remain in Reset for the Reset delay timer
(TRST). After that time expires, the RESET pin will be
driven to the low state.
3.4
Manual Reset (MR)
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.
3.5
Supply Voltage (VCC)
VCC can be used for power supply monitoring or a
voltage level that requires monitoring.
Pin No.
Symbol
Description
1
GND
Ground
2
RESET
(
TC1270)
RESET output remains low while VCC is below the Reset voltage threshold,
and for at least 140 ms min. after VCC rises above Reset threshold
2
RESET
(TC1271)
Reset output remains high while VCC is below the Reset voltage threshold,
and for at least 140 ms min. after VCC rises aboev Reset threshold
3MR
Manual Reset input generates a Reset when MR is below VIL
4VCC
Supply voltage


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