- 您现在的位置：买卖IC网 > PDF目录297483 > STM707M6E (STMICROELECTRONICS) 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 PDF资料下载
参数资料
| 型号： | STM707M6E |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件页数： | 4/32页 |
| 文件大小： | 832K |
| 代理商： | STM707M6E |
第1页第2页第3页当前第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
Operation
STM705, STM706, STM707, STM708, STM813L
Doc ID 10520 Rev 9
3.4
Watchdog output (STM705/706/813L)
When VCC drops below the reset threshold, WDO will go low even if the watchdog timer has
not yet timed out. However, unlike the reset output, WDO goes high as soon as VCC
exceeds the reset threshold. WDO may be used to generate a reset pulse by connecting it
to the MR input.
3.5
Power-fail input/output
The power-fail input (PFI) is compared to an internal reference voltage (independent from
the VRST comparator). If PFI is less than the power-fail threshold (VPFI), the power-fail
output (PFO) will go low. This function is intended for use as an undervoltage detector to
signal a failing power supply. Typically PFI is connected through an external voltage divider
(see Figure 9) to either the unregulated DC input (if it is available) or the regulated output of
the VCC regulator. The voltage divider can be set up such that the voltage at PFI falls below
VPFI several milliseconds before the regulated VCC input to the STM705/706/707/708/ 813L
or the microprocessor drops below the minimum operating voltage.
If the comparator is unused, PFI should be connected to VSS and PFO left unconnected.
PFO may be connected to MR on the STM703/704/818 so that a low voltage on PFI will
generate a reset output.
3.6
Ensuring a valid reset output down to VCC = 0 V
When VCC falls below 1 V, the state of the RST output can no longer be guaranteed, and
becomes essentially an open circuit. If a high value pulldown resistor is added to the RST
pin, the output will be held low during this condition. A resistor value of approximately
100 k
Ω will be large enough to not load the output under operating conditions, but still
sufficient to pull RST to ground during this low voltage condition (see Figure 10).
Figure 10.
Reset output valid to ground circuit
AI08835
STMXXX
RST
R1
相关PDF资料 |
PDF描述 |
|---|---|
| STO50U043306FREQ1 | TCVCXO, CLOCK, 10 MHz - 20 MHz, HCMOS OUTPUT |
| STPR1520DF | 15 A, 200 V, SILICON, RECTIFIER DIODE, TO-220AC |
| STPR1610CT | 8 A, 100 V, SILICON, RECTIFIER DIODE, TO-220AB |
| STPR506D | 5 A, 600 V, SILICON, RECTIFIER DIODE, TO-220AC |
| STPS20100CG-1 | 10 A, 100 V, SILICON, RECTIFIER DIODE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| STM707M6F | 功能描述:监控电路 4.63V Reset Suprvsr 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 |
| STM708 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V Supervisor |
| STM708ADS6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5 V supervisor |
| STM708ADS6F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5 V supervisor |
| STM708AM6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5 V supervisor |
发布紧急采购，3分钟左右您将得到回复。