Low Power Reset Circuit

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  • STM181x devices are low power reset devices used to monitor power supplies for microcontrollers. They perform a single function: asserting a reset signal whenever VCCsupply voltage drops below a preset value and keeping it asserted until VCChas risen above the preset threshold for a minimum period of time (trec). They provide excellent circuit reliability without additional external components when used with +3.0 V / +3.3 V (STM1815–STM1818), and +5 V (STM1810–STM1813) power supply systems.

    A precision voltage reference and comparator monitors the VCCinput for an out-of-tolerance condition. When an invalid VCCcondition occurs, the reset output (RST) is forced low (or high in the case of RST) and remains asserted for trecafter VCCrises above the reset threshold. The STM1813/1818 also keep reset asserted for trecafter the output is momentarily pulled to ground by an external push-button switch.
    The STM1812 and STM1817 have an active-high, push-pull output. The STM1810 and STM1815 (push-pull) and STM1811, STM1813, STM1816, and STM1818 (open-drain) have an active-low RSToutput. The open-drain devices (STM1811 / STM1813 / STM1816 / STM1818) also have an internal pull-up resistor to VCC. The STM1813 and STM1818 feature a debounced manual reset feature that asserts a reset if the RSTpin is pulled low for more than 1.5 μs. When used to initiate manual reset, RSTdebounces signals from devices such as mechanical switches. For devices with this feature, the release of the external switch triggers the reset period.
    The STM181x devices are guaranteed to output the correct logic state for VCCdown to 1.0 V (0 °C to +105 °C). They also provide a reset comparator designed to ignore fast transients on VCC.
    Reset thresholds are available between +2.55 V and +4.62 V. These small, low power devices are ideal for use in portable equipment. All are available in the space-saving 3-pin SOT23 package, and are specified from –40 °C to +105 °C.

    主要特性

    • Precision monitoring of 3 V, 3.3 V, and 5 V supply voltages
    • Four output configurations:
      • Push-pull, active-high (STM1812,1817)
      • Push-pull, active-low (STM1810,1815)
      • Open-drain, active-low (STM1811,1816)
      • Open-drain, active-low with push-button detect (STM1813,1818)
    • Reset pulse width - 100 ms (min.)
    • Low supply current - 4 μA (typ.)
    • Guaranteed assertion down to VCC= 1.0 V (0 °C to 105 °C)
    • Factory-trimmed reset thresholds of 2.55 V, 2.88 V, 3.06 V, 4.37 V, and 4.62 V (typ.)
    • Power supply transient immunity
    • Push-button/manual reset detect (STM1813/1818)
    • Operating temperature: –40 °C to 105 °C
    • ± 2.5% reset threshold accuracy:(–40 °C to 105 °C)
    • Available in the SOT23-3 package
    • Fully compatible with DS181x and MXD181x products.

样片和购买

产品型号
封装
包装类型
Voltage Reset 1 (V) (typ)
Voltage Reset 2 (V) (typ)
温度(ºC) 供货状态
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min
max
STM1815SWX7F SOT23 Tape And Reel 2.88 - -40 105
批量生产
0.35
更多信息

数量:

1000

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

查看供货情况

Distributor availability ofSTM1815SWX7F

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DIGIKEY WORLDWIDE 4838 1 Order Now
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代理商库存报告日期: 2019-10-04

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代理商库存报告日期: 2019-10-04

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STM1815RWX7F SOT23 Tape And Reel 2.55 - -40 105
批量生产
0.35
更多信息

数量:

1000

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

查看供货情况

Distributor availability ofSTM1815RWX7F

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 410 1 Order Now

代理商库存报告日期: 2019-10-04

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DIGIKEY

库存

410

Min.Order

1

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代理商库存报告日期: 2019-10-04

立即购买
STM1815TWX7F SOT23 Tape And Reel 3.06 - -40 105
批量生产
0.35
更多信息

数量:

1000

ECCN (US):

EAR99

Country of Origin:

MALAYSIA

查看供货情况

Distributor availability ofSTM1815TWX7F

代理商名称
地区 库存 最小订购量 Third party link
Newark Element14 AMERICA 750 0 Order Now
MOUSER WORLDWIDE 1500 1 Order Now
Farnell Element14 EUROPE 1647 1 Order Now

代理商库存报告日期: 2019-10-04

代理商名称

Newark Element14

库存

750

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

1500

Min.Order

1

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WORLDWIDE Order Now

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库存

1647

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EUROPE Order Now

代理商库存报告日期: 2019-10-04

立即购买

STM1815SWX7F

封装

SOT23

包装类型

Tape And Reel

单价(US$)

0.35*

Distributor availability ofSTM1815SWX7F

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 4838 1 Order Now
RS COMPONENTS EUROPE 920 1 Order Now
FUTURE WORLDWIDE 5700 1 Order Now
Newark Element14 AMERICA 750 0 Order Now
MOUSER WORLDWIDE 3996 1 Order Now
Farnell Element14 EUROPE 1911 1 Order Now

代理商库存报告日期: 2019-10-04

代理商名称

DIGIKEY

库存

4838

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

920

Min.Order

1

地区

EUROPE Order Now

FUTURE

库存

5700

Min.Order

1

地区

WORLDWIDE Order Now

Newark Element14

库存

750

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

3996

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1911

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-10-04

Voltage Reset 1 (V) (typ)

2.88

Voltage Reset 2 (V) (typ)

-

Operating Temperature (°C)

(min)

-40

(max)

105

供货状态

批量生产

单价(US$)

0.35

数量

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

STM1815RWX7F

封装

SOT23

包装类型

Tape And Reel

单价(US$)

0.35*

Distributor availability ofSTM1815RWX7F

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 410 1 Order Now

代理商库存报告日期: 2019-10-04

代理商名称

DIGIKEY

库存

410

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-10-04

Voltage Reset 1 (V) (typ)

2.55

Voltage Reset 2 (V) (typ)

-

Operating Temperature (°C)

(min)

-40

(max)

105

供货状态

批量生产

单价(US$)

0.35

数量

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

STM1815TWX7F

封装

SOT23

包装类型

Tape And Reel

单价(US$)

0.35*

Distributor availability ofSTM1815TWX7F

代理商名称
地区 库存 最小订购量 Third party link
Newark Element14 AMERICA 750 0 Order Now
MOUSER WORLDWIDE 1500 1 Order Now
Farnell Element14 EUROPE 1647 1 Order Now

代理商库存报告日期: 2019-10-04

代理商名称

Newark Element14

库存

750

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

1500

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1647

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-10-04

Voltage Reset 1 (V) (typ)

3.06

Voltage Reset 2 (V) (typ)

-

Operating Temperature (°C)

(min)

-40

(max)

105

供货状态

批量生产

单价(US$)

0.35

数量

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商

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产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
STM1815RWX7F
批量生产
SOT23 工业 Ecopack3
STM1815SWX7F
批量生产
SOT23 工业 Ecopack3
STM1815TWX7F
批量生产
SOT23 工业 Ecopack3

STM1815RWX7F

Package:

SOT23

Material Declaration**:

Marketing Status

批量生产

Package

SOT23

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM1815SWX7F

Package:

SOT23

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SOT23

Grade

Industrial

RoHS Compliance Grade

Ecopack3

STM1815TWX7F

Package:

SOT23

Material Declaration**:

Marketing Status

批量生产

Package

SOT23

Grade

Industrial

RoHS Compliance Grade

Ecopack3

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.