參數(shù)資料
型號(hào)： TC1271ARVCTTR
元件分類(lèi)： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
封裝： LEAD FREE, PLASTIC, SOT-23, 5 PIN
文件頁(yè)數(shù)： 18/48頁(yè)
文件大?。?/td> 541K
代理商： TC1271ARVCTTR
2007-2011 Microchip Technology Inc.
DS22035D-page 25
TC1270A/70AN/71A
5.0
APPLICATION INFORMATION
This section presents application-related information
that may be useful for your particular design require-
ments.
5.1
Supply Monitor Noise Sensitivity
The TC127XA devices are optimized for fast responses
to negative-going changes in VDD. A system with an
inordinate amount of electrical noise on VDD (such as a
system using relays) may require a 0.01 F or 0.1 F
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:
Typical Application Circuit
with Bypass Capacitor.
5.2
Conventional Voltage Monitoring
Figure 5-2 and Figure 5-3 show the TC127XA in
conventional voltage monitoring applications.
FIGURE 5-2:
Battery Voltage Monitor.
FIGURE 5-3:
Power Good Monitor.
5.3
Using in PIC Microcontroller,
ICSP Applications
Figure 5-4 shows the typical application circuit for using
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 the Microchip
Technical Brief TB087, “Using Voltage Supervisors with
PICmicro Microcontroller Systems which Implement
In-Circuit Serial Programming” (DS91087).
FIGURE 5-4:
Typical Application Circuit
for PIC Microcontroller with the ICSP Feature.
TC127XA
VDD
RST
VSS
0.1 F
RST
MR
VDD
RST
VSS
BATLOW
TC127XA
+
–
VDD
RST
VSS
Power Good
TC127XA
+
–
Pwr
Sply
Note:
This operation can only be done using the
device that has an Open-Drain RST pin
(TC1270AN).
Note:
It is recommended that the current into the
RST pin is current that is limited by a 1 k
resistor.
TC1270AN
VDD
VDD/VPP
VDD
RST
MCLR
Reset input)
(Active-Low)
VSS
PIC
Microcontroller
RPU
0.1 F
1k
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TC1271ASBVRCTR 制造商:MICROCHIP 制造商全稱(chēng):Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input
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