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TC1270LERCTR Folha de dados(PDF) 5 Page - Microchip Technology |
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TC1270LERCTR Folha de dados(HTML) 5 Page - Microchip Technology |
5 / 14 page © 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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