- 您现在的位置：买卖IC网 > PDF目录180534 > MAX6710 (Maxim Integrated Products, Inc.) Low-Voltage.High-Accuracy.Triple/Quad Voltage µ.P Supervisory Circuits in SOT Package PDF资料下载
参数资料
| 型号： | MAX6710 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Voltage.High-Accuracy.Triple/Quad Voltage µ.P Supervisory Circuits in SOT Package |
| 中文描述： | 低电压、高精度、三/四路电压、微处理器监控电路，SOT封装 |
| 文件页数： | 11/12页 |
| 文件大小： | 206K |
| 代理商： | MAX6710 |
MAX6701–08/MAX6701A–03A/05A–07A
Low-Voltage, SOT23 P Supervisors with Power-
Fail In/Out, Manual Reset, and Watchdog Timer
8
_______________________________________________________________________________________
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).
VCC, 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
VCC, 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
P’s activity. If the P 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 P.
When VCC, 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 P 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 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 P so it can prepare for an
orderly power-down. The low-input current at this pin
allows for large resistor values in the divider.
tWD
+5V
0V
WDI
+5V
0V
WDO
+5V
0V
RESET
+5V
0V
(RESET)
tRP
RESET EXTERNALLY
TRIGGERED BY MR
+5V
0V
MR
( ) ARE FOR MAX6702/MAX6706 ONLY.
tWDI
tRP
+5V
0V
RESET
WDO
+5V
0V
MR
tMR
+5V
0V
VCC
VTH
tMD
Figure 5. MAX6701/MAX6702/MAX6703/MAX6705/MAX6706/
MAX6707 Watchdog
Figure 6. MAX6701(A)/MAX6702(A)/MAX6703(A)/MAX6705(A)/
MAX6706(A)/MAX6707(A) RESET, MR, and WDO Timing with
WDI Three-Stated
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6710AUT | Analog IC |
| MAX6710BUT | Analog IC |
| MAX6710CUT | Analog IC |
| MAX6710DUT | Analog IC |
| MAX6710EUT | Analog IC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6710AUT | 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE HIGH-ACCURACY QUAD-VO - Cut Tape Product |
| MAX6710AUT+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.38V/2.93V/2.19V/ADJV 6PIN SOT-23 - Rail/Tube |
| MAX6710AUT+T | 功能描述:监控电路 Quad 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 |
| MAX6710AUT-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 |
| MAX6710BUT | 制造商:Maxim from Components Direct 功能描述:MAXIM MAX6710BUT PROCESSOR SUPERVISORS - Tape and Reel 制造商:Maxim Integrated Products 功能描述:LOW-VOLTAGE HIGH-ACCURACY QUAD-VO - Rail/Tube 制造商:Maxim 功能描述:Maxim MAX6710BUT Processor Supervisors |
发布紧急采购，3分钟左右您将得到回复。