STM1816RWX7F STMicroelectronics, STM1816RWX7F Datasheet - Page 5

• Manufacturer Part Number: STM1816RWX7F
• Description: IC RESET CIRCUIT 2.55V OD SOT-23
• Manufacturer: STMicroelectronics
• Type: Simple Reset/Power-On Resetr

Specifications of STM1816RWX7F

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: 100 ms Minimum
• Voltage - Threshold: 2.55V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-3
• Monitored Voltage: 3 V or 3.3 V or 5 V
• Undervoltage Threshold: 2.47 V
• Overvoltage Threshold: 2.64 V
• Manual Reset: Resettable
• Watchdog: No
• Battery Backup Switching: No
• Power-up Reset Delay (typ): 2 us
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1 V
• Supply Current (typ): 4 uA
• Maximum Power Dissipation: 320 mW
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 105 C
• Chip Enable Signals: No
• Minimum Operating Temperature: - 40 C
• Output Type: Open Collector / Drain
• Power Fail Detection: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4970-2

STM1810/1811/1812/1813/1815/1816/1817/1818
1
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 V
supply voltage drops below a preset value and keeping it asserted until V
the preset threshold for a minimum period of time (t
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 V
condition. When an invalid V
(or high in the case of RST) and remains asserted for t
threshold. The STM1813/1818 also keep reset asserted for t
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 V
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 V
1.0 V (0 °C to +105 °C). They also provide a reset comparator designed to ignore fast
transients on V
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.
1. For STM1812, STM1817.
Logic diagram
CC
.
CC
Doc ID11464 Rev 8
condition occurs, the reset output (RST) is forced low
rec
CC
). They provide excellent circuit
rec
. The STM1813 and STM1818
after V
CC
rec
input for an out-of-tolerance
after the output is
CC
rises above the reset
CC
has risen above
CC
down to
Description
CC
5/25