TC1270A MICROCHIP [Microchip Technology], TC1270A Datasheet - Page 20

• Manufacturer Part Number: TC1270A
• Description: Voltage Supervisor with Manual Reset Input
• Manufacturer: MICROCHIP [Microchip Technology]

TC1270A/70AN/71A
4.2.3
As the device powers-down/brown-outs, the V
from a voltage above the devices trip point (V
device will trip at a voltage between the maximum trip
point (V
(V
below this voltage, the RST/RST pin will be forced to
the active state.
TABLE 4-3:
FIGURE 4-8:
DS22035B-page 20
TC1270A
TC1271A
Note 1:
TRIP(MIN)
Device
TRIP(MAX)
). Once the device voltage (V
The RST/RST pin will be driven inactive after the Reset Delay Timer (t
POWER-DOWN/BROWN-OUTS
V
RST
(with V
DD
RESET PIN STATES
(1)
) and the minimum trip point
DD
RST
V
DD
Falling)
Note 1:
V
State of RST Pin when:
t
TRIP
< V
—
RD
Operation as determined by the V
L
TRIP
1V
The TC1270AN requires an external pull-up resistor.
V
DD
< 1V is outside the
device specifications
> V
TRIP
DD
—
H
DD
) goes
TRIP
). The
falls
(1)
(with V
V
DD
DD
State of RST Pin when:
< V
—
Figure 4-8
determined by the V
from the normal operating point, the device “enters”
reset by crossing the V
V
rises, the device “exits” reset by crossing the V
age (below or at V
been detected, the Reset Delay Timer (t
Once the t
inactive.
Table 4-3
H
Rising)
TRIP(MAX)
V
TRIP
TRIP
TRIP
.
shows the state of the RST or RST pins.
RST
V
shows the waveform of the RST pin as
and V
DD
t
RST
time completes, the Reset pin is driven
> V
—
L
TRIP(MIN)
RST
TRIP(MAX)
t
TRIP
RD
DD
) times out.
voltage. As the V
(1)
© 2007 Microchip Technology Inc.
). Then when V
). After the “exit” state has
TRIP
Push-Pull
Push-Pull
Output Driver
t
voltage (between
RST
DD
voltage falls
RST
DD
TRIP
) starts.
voltage
volt-