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STM1816SWX7F

Supervisor Open Drain or Open Collector 1 Channel SOT-23-3

Manufacturer:

STMicroelectronics
Mfr.Part #:

STM1816SWX7F
Datasheet:

STM1816SWX7F Datasheet (PDF)
Programmabe:

Not Verified
Type:

Simple Reset/Power-On Reset
Number of Voltages Monitored:

1
Voltage - Threshold:

2.88V
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STM1816SWX7F General Description

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-lowRSToutput. 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 theRSTpin 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.

Key Features

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-buttondetect (STM1813,1818)
Reset pulse width - 100 ms (min.)
Low supply current - 4 μA (typ.)
Guaranteed assertion down to V_CC= 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.

Specifications

Programmabe	Not Verified	Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1	Voltage - Threshold	2.88V
Output	Open Drain or Open Collector	Reset	Active Low
Reset Timeout	100ms Minimum	Operating Temperature	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount	Base Product Number	STM1816