DS1705

3.3V及5.0V MicroMonitor


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说明

The DS1705/DS1706 3.3- or 5.0-Volt MicroMonitor monitors three vital conditions for a microprocessor: power supply, software execution, and external override. A precision temperature compensated reference and comparator circuit monitor the status of VCC at the device and at an upstream point for maximum protection. When the sense input detects an out-of-tolerance condition a non-maskable interrupt is generated. As the voltage at the device degrades, an internal power fail signal is generated which forces the reset to an active state. When VCC returns to an in-tolerance condition, the reset signal is kept in the active state for a minimum of 130ms to allow the power supply and processor to stabilize.

The second function the DS1705/DS1706 performs is pushbutton reset control. The DS1705/DS1706 debounces the pushbutton input and guarantees an active reset pulse width of 130ms minimum.

The third function is a watchdog timer. The DS1705/DS1706 has an internal timer that forces the WDO signal to the active state if the strobe input is not driven low prior to time-out.
DS1705、DS1706:原理框图 DS1705、DS1706:原理框图 放大+

关键特性

  • Halts and restarts an out-of-control microprocessor
  • Holds microprocessor in check during power transients
  • Automatically restarts microprocessor after power failure
  • Monitors pushbutton for external override
  • Accurate 5%, 10% or 20% resets for 3.3V systems and 5% or 10% resets for 5.0V systems
  • Eliminates the need for discrete components
  • 3.3V 20% tolerance for use with 3.0V systems
  • Pin-compatible with the MAXIM MAX705/MAX706 in 8-pin DIP, 8-pin SO, and µSOP
  • 8-pin DIP, 8-pin SO and 8-pin µSOP packages
  • Industrial temperature range -40°C to +85°C
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureWatchdog TimeoutSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
DS1705 3.3 to 5.5
Active Low
Push-Pull
85ms to 300msInput/Output (WDI/WDO)1s to 2s
Adjustable Reset Input
Manual Reset
Power Fail Comparator/Low Battery Detect
2.560
PDIP/8
SOIC (N)/8
UMAX/8
$3.28 @1k
DS1706 3.3 to 5.5
Active Low
Push-Pull
60
PDIP/8
SOIC (N)/8
UMAX/8
$1.77 @1k
DS1706L 3.3 to 5.5
Active High
Push-Pull
60
SOIC(N)/8
$1.77 @1k
DS1706P 2.5 to 3.3
Active High
Push-Pull
50
SOIC(N)/8
$3.90 @1k
DS1706R 2.5 to 3.3
Active Low
Push-Pull
50
SOIC(N)/8
$3.90 @1k
DS1706S 2.5 to 3.3
Active Low
Push-Pull
50
SOIC(N)/8
$3.89 @1k
DS1706T 2.5 to 3.3
Active Low
Push-Pull
50
SOIC(N)/8
$4.12 @1k
查看所有Supervisors (1 Monitored Voltage) (261)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

CAD Symbols and Footprints

  • DS1705EPA
  • DS1705EPA+
  • DS1705ESA
  • DS1705ESA+
  • DS1705ESA+T&R
  • DS1705ESA/T&R
  • DS1705EUA
  • DS1705EUA+
  • DS1705EUA+T&R
  • DS1705EUA/T&R
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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