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| 型号： | MAX6706ARKA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/12页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU LV SOT23-8 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 高有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 2.63V，可调 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 带卷 (TR) |
Low-Voltage, SOT23 μP Supervisors with Power-
Fail In/Out, Manual Reset, and Watchdog Timer
Standard- vs. A-Version Comparison
The MAX6701/MAX6702/MAX6703/MAX6705/MAX6706/
MAX6707s ’ WDO latches low when one of the following
events occurs:
? The watchdog timer times out (1.6s, typ).
? V CC , RST_IN1, or RST_IN2 is below its reset threshold.
? MR is pulled low.
? WDO only deasserts with a valid WDI transition.
TheMAX6701(A)/MAX6702(A)/MAX6703(A)/MAX6705(A)/
MAX6706(A)/MAX6707(A)s ’ WDO asserts when either
V CC , RST_IN1, or RST_IN2 is below its reset threshold.
WDO deasserts without a timeout delay when the
undervoltage situation has expired. WDO is latched low
when the watchdog timer elapses without seeing a WDI
transition. WDO deasserts with a valid WDI transition
OR by pulling MR low.
See Figures 4 and 5 for standard-version timing. See
Figures 6 and 7 for A-version timing.
Watchdog Timer
The MAX6701 – MAX6707 watchdog circuit monitors the
μP ’ s activity. If the μP does not toggle the WDI within 1.6s,
WDO goes low. When RESET is asserted, the watchdog
timer stays cleared and does not count. As soon as reset
is released, the timer starts counting. WDO deasserts
after a valid transition is detected at WDI. Pulses as short
as 50ns can be detected.
Typically, WDO is connected to the NMI input of a μP.
When V CC , RST_IN1, or RST_IN2 drop below the reset
threshold, WDO goes low whether or not the watchdog
timer has timed out. Normally this would trigger an NMI,
but RESET goes low simultaneously, and thus overrides
the NMI.
The MAX6704 watchdog circuit does not have an inde-
pendent watchdog output ( WDO ). If the μP does not
toggle the watchdog input within 1.6s, the MAX6704
asserts a reset output pulse for the reset timeout period.
Manual Reset
The manual reset input ( MR ) allows reset to be trig-
gered by a pushbutton switch. The switch is effectively
debounced by the reset pulse width. MR is CMOS logic
compatible, so it can be driven by an external logic
line. MR can be used to force a watchdog timeout to
generate a reset pulse in the MAX6701(A)/MAX6702(A)/
MAX6703(A)/MAX6705(A)/MAX6706(A)/MAX6707(A) by
connecting WDO to MR .
Power-Fail Comparator
The uncommitted power-fail comparator can be used
for various purposes because its noninverting input and
output are externally available. The inverting input is
internally connected to a 0.62V reference. To build an
early warning circuit for power failure, connect the PFI
pin to a voltage-divider (see the Typical Operating
Circuit ). Choose the voltage-divider ratio so that the
voltage at PFI falls below 0.62V just before the regulator
drops out. Use PFO to interrupt the μP so it can prepare
for an orderly power-down. The low-input current at this
pin allows for large resistor values in the divider.
WDI
t WDI
+5V
0V
t WD
t WD
V CC
V TH
V TH
t RP
t RP
+5V
+5V
WDO
0V
RESET
0V
+5V
RESET
0V
RESET EXTERNALLY
TRIGGERED BY MR
t RP
MR
+5V
0V
+5V
t MD
(RESET)
0V
+5V
t MR
+5V
MR
0V
WDO
0V
( ) ARE FOR MAX6702/MAX6706 ONLY.
Figure 6. MAX6701(A)/MAX6702(A)/MAX6703(A)/MAX6705(A)/
Figure 5. MAX6701/MAX6702/MAX6703/MAX6705/MAX6706/
MAX6707 Watchdog
MAX6706(A)/MAX6707(A) RESET, MR, and WDO Timing with
WDI Three-Stated
8
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|---|---|
| MAX6706ASKA | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
| MAX6706ASKA+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.93V 12UA 8PIN SOT-23 - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX6706ASKA+T | 功能描述:监控电路 Single uPower Supervisor 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 |
| MAX6706ASKA-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 |
| MAX6706ATKA | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
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