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參數(shù)資料
| 型號： | MAX6730UTSD2+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO6 |
| 封裝： | SOT-23, 6 PIN |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 244K |
| 代理商： | MAX6730UTSD2+T |
MAX6730–MAX6735
Overdrive, for which reset pulses are not generated.
The graph was produced using falling VCC_ pulses,
starting above VTH and ending below the reset thresh-
old by the magnitude indicated (reset threshold over-
drive). The graph shows the maximum pulse width that
a falling VCC transient typically might have without
causing a reset pulse to be issued. As the amplitude of
the transient increases (i.e., goes further below the
reset threshold), the maximum allowable pulse width
decreases. A 0.1F bypass capacitor mounted close to
VCC_ provides additional transient immunity.
Watchdog Software Considerations
Setting and resetting the watchdog input at different
points in the program rather than “pulsing” the watch-
dog input high-low-high or low-high-low helps the
watchdog timer closely monitor software execution.
This technique avoids a “stuck” loop, in which the
watchdog timer continues to be reset within the loop,
preventing the watchdog from timing out. Figure 6
shows an example flow diagram in which the I/O dri-
ving the watchdog input is set high at the beginning of
the program, set low at the beginning of every subrou-
tine or loop, and then set high again when the program
returns to the beginning. If the program “hangs” in any
subroutine, the I/O continually asserts low (or high),
and the watchdog timer expires, issuing a reset or
interrupt.
Single-/Dual-/Triple-Voltage P Supervisory
Circuits with Independent Watchdog Output
12
______________________________________________________________________________________
START
SET WDI
HIGH
PROGRAM
CODE
RETURN
SUBROUTINE
COMPLETED
HANG IN
SUBROUTINE
SUBROUTINE OR
PROGRAM LOOP
SET WDI LOW
Figure 6. Watchdog Flow Diagram
MAX6730–
MAX6735
VREF
RESET
TIMEOUT
PERIOD
RESET
OUTPUT
DRIVER
WATCHDOG
TIMER
REF
VCC1
VREF / 2
GND
VCC1
MR
VCC1
VCC2
MR
PULLUP
VCC1
VCC2
RSTIN
RST
WDO
WDI
Functional Diagram
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| MAX6731AUTLD3+T | Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output |
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| MAX6731AUTMD2+T | Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output |
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| MAX6731AUTMD4+T | Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6730UTSD3 | 制造商:Maxim Integrated Products 功能描述:SINGLE-VOLTAGE MICROPROCESSOR SUPER - Cut Tape Product |
| MAX6730UTSD3+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX6730UTSD3+T | 功能描述:監(jiān)控電路 Single uPower Supervisor 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(guān):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 |
| MAX6730UTSD3-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(guān):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 |
| MAX6730UTSD4 | 制造商:Maxim Integrated Products 功能描述:SINGLE-VOLTAGE MICROPROCESSOR SUPER - Rail/Tube |
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