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參數(shù)資料
| 型號： | MAX6323CUT46-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Analog IC |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO6 |
| 封裝： | ROHS COMPLIANT, SOT-23, 6 PIN |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 168K |
| 代理商： | MAX6323CUT46-T |
Interfacing to Ps with
Bidirectional Reset Pins
Since the RESET output on the MAX6324 is open-drain,
this device easily interfaces with Ps that have bidirec-
tional reset pins, such as the Motorola 68HC11.
Connecting the P supervisor’s RESET output directly
to the microcontroller’s (C’s) RESET pin with a single
pullup resistor allows either device to assert reset
(Figure 7).
MAX6324 Open-Drain
RESET Output
Allows Use with Multiple Supplies
Generally, the pullup resistor connected to the
MAX6324 will connect to the supply voltage that is
being monitored at the IC’s VCC pin. However, some
systems may use the open-drain output to level-shift
from the monitored supply to reset circuitry powered by
some other supply (Figure 8). Keep in mind that as the
MAX6324’s VCC decreases below +1.2V, so does the
IC’s ability to sink current at RESET. Also, with any pull-
up resistor, RESET will be pulled high as VCC decays
toward 0. The voltage where this occurs depends on
the pullup resistor value and the voltage to which it is
connected.
Watchdog Software Considerations
To help the watchdog timer monitor software execution
more closely, set and reset the watchdog input at dif-
ferent points in the program, rather than “pulsing” the
watchdog input high-low-high or low-high-low. This
technique avoids a “stuck” loop in which the watchdog
time would continue to be reset within the loop, keeping
the watchdog from timing out.
Figure 9 shows an example of a flow diagram where
the I/O driving the watchdog input is set high at the
beginning of the program, set low at the beginning of
every subroutine or loop, then set high again when the
program returns to the beginning. If the program should
“hang” in any subroutine, the problem would be quickly
corrected, since the I/O is continually set low and the
watchdog time is allowed to time out, causing a reset or
interrupt to be issued.
MAX6323/MAX6324
P Supervisory Circuits with Windowed
(Min/Max) Watchdog and Manual Reset
_______________________________________________________________________________________
9
MAX6323
GND
VCC
RESET
R1
100k
Figure 6. RESET Valid to VCC = Ground Circuit
MAX6324
GND
VCC
P
RESET
INPUT
Figure 7. Interfacing to Ps with Bidirectional Reset Pins
MAX6324
GND
VCC
+3.3V
+5.0V
VCC
5V SYSTEM
RESET
INPUT
RPULLUP
Figure 8. MAX6324 Open-Drain RESET Output Allows Use with
Multiple Supplies
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| MAX6323GUT23-T | Analog IC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6323DUT23 | 制造商:Maxim Integrated Products 功能描述:UP SUPERVISORY CIRCUIT WITH WINDOWE - Cut Tape Product |
| MAX6323DUT23+T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6323DUT23-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6323DUT26 | 制造商:Maxim Integrated Products 功能描述:UP SUPERVISORY CIRCUIT WITH WINDOWE - Cut Tape Product |
| MAX6323DUT26+T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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