STM1810/1811/1812/1813/1815/1816/1817/1818

Description

Doc ID11464 Rev 8

5/25

1

Description

STM181x devices are low power reset devices used to monitor power supplies for

reliability without additional external components when used with +3.0 V / +3.3 V

(STM1815–STM1818), and +5 V (STM1810–STM1813) power supply systems.

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 /

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.

1.0 V (0 °C to +105 °C). They also provide a reset comparator designed to ignore fast

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 1.

Logic diagram

1.

For STM1812, STM1817.