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参数资料
| 型号： | MAX6728KAVDD2-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | Dual/Triple Ultra-Low-Voltage SOT23 µ.P Supervisory Circuits |
| 中文描述： | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO6 |
| 封装： | ROHS COMPLIANT, MO-178AB, SOT-23, 6 PIN |
| 文件页数： | 4/28页 |
| 文件大小： | 334K |
| 代理商： | MAX6728KAVDD2-T |
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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
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6728KAVDD3-T | Dual/Triple Ultra-Low-Voltage SOT23 µ.P Supervisory Circuits |
| MAX6728KAWED4-T | Analog IC |
| MAX6728KAWED5-T | Dual/Triple Ultra-Low-Voltage SOT23 µ.P Supervisory Circuits |
| MAX6728KAWED6-T | Analog IC |
| MAX6728KAWGD1-T | Dual/Triple Ultra-Low-Voltage SOT23 µ.P Supervisory Circuits |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6728KAVDD3 | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
| MAX6728KAVDD3+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6728KAVDD3+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 |
| MAX6728KAVDD3-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 |
| MAX6728KAVDD4-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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