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参数资料
| 型号： | MAX6344ZUT-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | Analog IC |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封装： | MINIATURE, SOT-23, 6 PIN |
| 文件页数： | 7/8页 |
| 文件大小： | 548K |
| 代理商： | MAX6344ZUT-T |
Note that this method does not work with the open-drain
output of the MAX6343. The resistor value used is not
critical, but it must be large enough not to load the reset
output when VCC is above the reset threshold. For most
applications, 100k
is adequate.
Monitoring Two Supplies
Monitor another voltage by connecting a resistor-divider
to PFI as shown in Figure 7. The threshold voltage will
then be given by:
VTH(PFI) = 1.25[(R1 + R2) / R2]
where VTH(PFI) is the threshold at which the monitored
voltage will trip PFO.
A good rule of thumb for selecting the resistors is to
choose R2 between 250k
and 500k and solve for R1.
Connect PFO to MR in applications that require reset to
assert when the second voltage falls below its threshold.
Monitoring a Negative Voltage
Connect the circuit as shown in Figure 8 to use the
power-fail comparator to monitor a negative supply rail.
PFO stays low when V- is good. When V- rises to cause
PFI to be above +1.25V, PFO goes high. By adding the
resistors and transistor as shown, a high PFO triggers
reset. As long as PFO remains high, the MAX6342/
MAX6343/MAX6344 will keep reset asserted. Note that
the accuracy of this circuit depends on the PFI thresh-
old tolerance, the VCC line voltage, and the resistors.
Also, ensure that the voltage at PFI remains above
GND.
Interfacing to Ps with
Bidirectional Reset Pins
MAX6342–MAX6345
6-Pin P Reset Circuit with
Power-Fail Comparator
_______________________________________________________________________________________
7
VCC
R1
R2
V+
GND
( ) ARE FOR MAX6344 ONLY.
TO
P
PFI
MR
PFO
RESET
(RESET)
MAX6342
MAX6343
MAX6344
Figure 7. Monitoring Two Supplies
VCC
R1
R2
V-
GND
( ) ARE FOR MAX6344 ONLY.
VCC - 1.25V = 1.25V - VTRIP
100k
100k
PFI
MR
PFO
RESET
(RESET)
MAX6342
MAX6343
MAX6344
VTRIP < 0
Figure 8. Monitoring a Negative Voltage
VCC
GND
BUFFERED RESET TO
OTHER SYSTEM
COMPONENTS
4.7k
RESET
MAX6342
MAX6345
VCC
GND
P
RESET
Figure 9. Interfacing to Ps with Bidirectional Reset I/O
SOT Top Marks
PART
SOT TOP
MARK
PART
SOT TOP
MARK
MAX6342LUT-T
AACP
MAX6344LUT-T
AADQ
MAX6342MUT-T
AACQ
MAX6344MUT-T
AADR
MAX6342TUT-T
AACR
MAX6344TUT-T
AADS
MAX6342SUT-T
AACS
MAX6344SUT-T
AADT
MAX6342RUT-T
AACT
MAX6344RUT-T
AADU
MAX6342ZUT-T
AACU
MAX6344ZUT-T
AADV
MAX6343LUT-T
AACV
MAX6345LUT-T
AADW
MAX6343MUT-T
AACW
MAX6345MUT-T
AADX
MAX6343TUT-T
AACX
MAX6345TUT-T
AADY
MAX6343SUT-T
AACY
MAX6345SUT-T
AADZ
MAX6343RUT-T
AACZ
MAX6345RUT-T
AAEA
MAX6343ZUT-T
AADA
MAX6345ZUT-T
AAEB
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6345 | 6-Pin µ.P Reset Circuit with Power-Fail Comparator |
| MAX6345LUT-T | Analog IC |
| MAX6345MUT-T | Analog IC |
| MAX6345RUT-T | Analog IC |
| MAX6345SUT-T | Analog IC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6345LTUK | 制造商:Maxim Integrated Products 功能描述:6 PINS THNSOT PKG - Tape and Reel |
| MAX6345LUT | 制造商:Maxim Integrated Products 功能描述:6 PINS THNSOT PKG - Cut Tape Product |
| MAX6345LUT+ | 制造商:Maxim from Components Direct 功能描述:MAXIM MAX6345LUT+, SUPERVISORS - Tape and Reel 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.63V 30UA 6PIN SOT-23 - Rail/Tube 制造商:Maxim 功能描述:Maxim MAX6345LUT+, Microprocessor Supervisory Circuit 4.63V Reset Threshold 1.0V-5.5V 6-pin SOT23 |
| MAX6345LUT+T | 功能描述:监控电路 6-Pin uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6345LUT-T | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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