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TC1270A 查看數據表(PDF) - Microchip Technology

零件编号
产品描述 (功能)
比赛名单
TC1270A
Microchip
Microchip Technology Microchip
TC1270A Datasheet PDF : 40 Pages
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TC1270A/70AN/71A
3.1 Ground Terminal (VSS)
VSS provides the negative reference for the analog
input voltage. Typically, the circuit ground is used.
3.2 Supply Voltage (VDD)
VDD can be used for power supply monitoring or a
voltage level that requires monitoring.
3.3 Reset Output (RST and RST)
There are three types of Reset output pins. These are:
1. Push-Pull active-low Reset
2. Push-Pull active-high Reset
3. Open-Drain active-low Reset, External pull-up
resistor required.
3.3.1 ACTIVE-LOW (RST) - PUSH-PULL
The RST push-pull output remains low while VDD is
below the reset voltage threshold (VTRIP). The time that
the RST pin is held low after the device voltage (VDD)
returns to a high level (> VTRIP) is typically 280 ms.
After the Reset delay timer expires, the RST pin will be
driven to the high state.
3.3.2 ACTIVE-HIGH (RST) - PUSH-PULL
The RST push-pull output remains high while VDD is
below the reset voltage threshold (VTRIP). The time that
the RST pin is held high after the device voltage (VDD)
returns to a high level (> VTRIP) is typically 280 ms.
After the Reset delay timer expires, the RST pin will be
driven to the low state.
3.3.3 ACTIVE-LOW (RST) - OPEN-DRAIN
The RST open-drain output remains low while VDD is
below the reset voltage threshold (VTRIP). The time that
the RST pin is held low after the device voltage (VDD)
returns to a high level (> VTRIP) depends on the Reset
Timeout selected. After the Reset Delay Timer expires,
the RST pin will float.
3.4 Manual Reset Input (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.
DS22035B-page 16
© 2007 Microchip Technology Inc.

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