TC1270A MICROCHIP [Microchip Technology], TC1270A Datasheet - Page 23

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

5.0
This section shows application related information that
may be useful for your particular design requirements.
5.1
The TC127XA devices are optimized for fast response
to negative-going changes in V
inordinate amount of electrical noise on V
systems using relays) may require a 0.01 µF or 0.1 µF
bypass capacitor to reduce detection sensitivity. This
capacitor should be installed as close to the TC127XA
as possible to keep the capacitor lead length short.
FIGURE 5-1:
with Bypass Capacitor.
5.2
Figure 5-2
conventional voltage monitoring applications.
FIGURE 5-2:
FIGURE 5-3:
© 2007 Microchip Technology Inc.
Pwr
Sply
+
–
+
– –
APPLICATION INFORMATION
Supply Monitor Noise Sensitivity
Conventional Voltage Monitoring
and
MR
TC127XA
TC127XA
TC127XA
Figure 5-3
V
V
V
V
V
DD
SS
V
DD
SS
DD
Typical Application Circuit
Battery Voltage Monitor.
Power Good Monitor.
SS
RST
RST
show the TC127XA in
RST
RST
DD
. Systems with an
0.1 µF
Power Good
BATLOW
DD
(such as
5.3
Figure 5-4
the TC1270AN for voltage supervisory function when
the PIC microcontroller will be programmed via the
In-Circuit Serial Programming™ (ICSP™) feature.
Additional information is available in TB087, “Using
Voltage Supervisors with PICmicro
Systems which Implement In-Circuit Serial Program-
ming™”, DS91087.
FIGURE 5-4:
for PIC
Feature.
TC1270AN
Note:
Note:
TC1270A/70AN/71A
V
V
®
SS
Using in PIC
ICSP™ Applications
DD
RST
Microcontroller with the ICSP™
shows the typical application circuit for using
This operation can only be done using the
device with the Open-Drain RST pin
(TC1270AN).
It is recommended that the current into the
RST pin be current limited by a 1 kΩ
resistor.
0.1 µF
1 kΩ
Typical Application Circuit
®
Microcontroller,
R
V
PU
DD
/V
PP
Microcontroller
DS22035B-page 23
MCLR
Reset input)
(Active-Low)
®
Microcontroller
V
PIC
V
SS
DD
®