TC1270AMAVRCTR datasheet(14/42 Pages) MICROCHIP

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TC1270A/70AN/71A

DS20002035F-page 14

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3.0

PIN DESCRIPTIONS

Descriptions of the pins are listed in Table 3-1.

TABLE 3-1:

PINOUT DESCRIPTION

Pin Number

Sym.

Standard Function

TC1270A

(Push-Pull,

active-low)

TC1270AN

(Open-Drain,

active-low)

TC1271A

(Push-Pull,

active-high)

Type

Buffer /

Driver

151

VSS

—

Power Ground

—

—RST

Push-

Pull

Reset output (Push-Pull), active-low

H = VDD > VTRIP, Reset pin is inactive

(after Reset Delay Timer completes)

L = VDD < VTRIP, Reset pin is active

Goes active (Low) if one of these conditions

occurs:

If VDD falls below the selected Reset

voltage threshold.

If the MR pin is forced low.

During power-up.

—

—4

—

—RST

Open-

Drain

Reset output (Open-Drain), active-low

Float = VDD > VTRIP, Reset pin is inactive

(after Reset Delay Timer completes)

L = VDD < VTRIP, Reset pin is active

Goes active (Low) if one of these conditions

occurs:

If VDD falls below the selected Reset

voltage threshold.

If the MR pin is forced low.

During power-up.

—

RST

Push-

Pull

Reset output (Push-Pull), active-high

H = VDD < VTRIP, Reset pin is active

L = VDD > VTRIP, Reset pin is inactive

(after Reset Delay Timer completes)

Goes active (High) if one of these conditions

occurs:

If VDD falls below the selected Reset

voltage threshold.

If the MR pin is forced low.

During power-up.

Note 1: The MR pin has an internal weak pull-up (18.5 k

 typical).

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