TCM811 datasheet(6/16 Pages) MICROCHIP

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TCM811/TCM812

DS21615C-page 6

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) (TCM811)

RESET output remains low while VDD is below the

Reset voltage threshold (VTRIP). Once the device

voltage (VDD) 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) (TCM812)

RESET output remains high while VDD is below the

Reset voltage threshold (VTRIP). Once the device

voltage (VDD) 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 (VDD)

VDD can be used for power supply monitoring or a

voltage level that requires monitoring.

Pin No.

Symbol

Description

GND

Ground

RESET

(TCM811)

RESET push-pull output remains low while VDD is below the reset voltage

threshold, and for at least 140 ms (min.) after VDD rises above reset threshold

RESET

(TCM812)

Reset push-pull output remains high while VDD is below the reset voltage threshold,

and for at least 140 ms (min.) after VDD rises above reset threshold

Manual Reset input generates a Reset when MR is below VIL

4VDD

Supply voltage

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