STM1810 _ ST 代理商WOSENDONGLI 代理意法STM1810

STM1810 低功耗复位电路

STM181x devices are low power reset devices used to monitor power supplies for microcontrollers. They perform a single function: asserting a reset signal whenever VCC supply voltage drops below a preset value and keeping it asserted until VCC has 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 VCC input for an out-of-tolerance condition. When an invalid VCC condition occurs, the reset output (RST) is forced low (or highin the case of RST) and remains asserted for trec after VCC rises above the reset threshold. The STM1813/1818 also keep reset asserted for trec after 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 RST output. 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 RST pin is pulled low for more than 1.5 μs. When used to initiate manual reset, RST debounces 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 VCC down 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. Figure 4 shows a typical hardware hookup for STM181x devices to a Microcontroller.

STM1810 订购型号

Ordering Model	Package	RoHS Compliance Grade	Marketing Status	Voltage Reset 1(VRST1)	Operating Temperature	Operating Temperature
				typ	min	max
				V	°C	°C
STM1810LWX7F	SOT 23 3 LDS	Ecopack2	Active	4.62	-40	105
STM1810MWX7F	SOT 23 3 LDS	Ecopack2	Active	4.37	-40	105

STM1810 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.

STM1810 低功耗复位电路

STM1810 订购型号

STM1810 特性:

STM1810 技术支持与电子电路设计开发资源下载