MXD1812:Low-Power µP Reset Circuits in 3-Pin SC70/SOT23

The MXD1810–MXD1813/MXD1815–MXD1818 family of microprocessor (µP) reset circuits monitor power supplies in µP and digital systems. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +2.5V/+3.0V/+3.3V (MXD1815–MXD1818), and +5V (MXD1810–MXD1813) systems. These circuits assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping reset asserted for at least 100ms after VCC rises above the reset threshold. The MXD1813/MXD1818 also keep reset asserted for at least 100ms after the output is momentarily pulled to GND by an external push-button switch. The MXD1812/MXD1817 have an active-high push-pull RESET output. The MXD1810/MXD1815 (push-pull) and MXD1811/MXD1813/MXD1816/MD1818 (open-drain) have an active-low RESET output. The open-drain devices (MXD1811/MXD1813/MXD1816/MXD1818) have an internal pullup resistor to VCC. The MXD1813/MXD1818 feature a debounced manual reset feature that asserts a reset if the active-low RESET pin is pulled low for more than 1.5µs. When used to initiate manual reset, active-low RESET debounces signals from devices such as mechanical switches. For devices with this feature, the release of the external switch triggers the reset period. The MXD1810–MXD1813/MXD1815–MXD1818 are guaranteed to output the correct logic state for VCC down to +1V. These ICs provide a reset comparator designed to ignore fast transients on VCC. Reset thresholds are available between +2.18V and +4.62V. These small, low-power (4µA) devices are ideal for use in portable equipment. All are available in space-saving 3-pin SC70 and SOT23 packages, and are specified from -40°C to +105°C.

Key Features
  • Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power-Supply Voltages
    • Available in Four Reset Output Configurations
    • Factory-Set Reset Threshold Voltages: 2.18V, 2.31V, 2.55V, 2.88V, 3.06V, 4.12V, 4.37V, 4.62V
    • ±2.5% Reset Threshold Accuracy Over Temperature
    • Fixed Reset Timeout Period: 100ms (min)
    • Guaranteed RESET/active-low RESET Valid to VCC = +1V
    • Debounced Manual Reset Detect (MXD1813/MXD1818)
    • Power-Supply Transient Immunity
    • No External Components
    • Low Power Consumption (4µA)
    • Pin Compatible with DS181_ Products (SOT23)
    • 3-Pin SC70 and SOT23 Packages
MXD1810, MXD1811, MXD1812, MXD1813, MXD1815, MXD1816, MXD1817, MXD1818: Pin Configuration
MXD1810, MXD1811, MXD1812, MXD1813, MXD1815, MXD1816, MXD1817, MXD1818: Pin Configuration
Applications/Uses
  • Computers and Controllers
  • Critical µP and µC Monitoring
  • Intelligent Instruments
  • Portable Battery-Powered Equipment
  • Printers
  • Set-Top Boxes
DataSheet
titleDownload file
MXD1810-MXD1818 Data SheetMXD1810-MXD1818.pdf
Parametrics
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MXD18103.3 to 5.5Active Low
Push-Pull
85ms to 300msNo Watchdog-1.510SC-70/3
SOT/3
$2.04 @1k
MXD18113.3 to 5.5Active Low
Open Drain
-SC-70/3
SOT/3
$1.16 @1k
MXD18123.3 to 5.5Active High
Push-Pull
-SC-70/3
SOT/3
$1.16 @1k
MXD18133.3 to 5.5Active Low
Open Drain
Manual ResetSC-70/3
SOT/3
$1.15 @1k
MXD18151.8 to 2.5
2.5 to 3.3
Active Low
Push-Pull
-SC-70/3
SOT/3
$1.18 @1k
MXD18161.8 to 2.5
2.5 to 3.3
Active Low
Open Drain
-SC-70/3
SOT/3
$1.16 @1k
MXD18171.8 to 2.5
2.5 to 3.3
Active High
Push-Pull
-SC-70/3
SOT/3
$2.04 @1k
MXD18181.8 to 2.5
2.5 to 3.3
Active Low
Open Drain
Manual ResetSC-70/3
SOT/3
$1.16 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MXD1812UR41+TActiveSOT,;3 pin;8 mm²-40°C to +85°CLead Free
MXD1812UR41-TNo Longer AvailableMXD1812UR41+TSOT,;3 pin;8 mm²-40°C to +85°CNo
MXD1812UR44+TActiveSOT,;3 pin;8 mm²-40°C to +85°CLead Free
MXD1812UR44-TNo Longer AvailableMXD1812UR44+TSOT,;3 pin;8 mm²-40°C to +85°CNo
MXD1812UR46+ActiveSOT,;3 pin;8 mm²-40°C to +85°CLead Free
MXD1812UR46+TActiveSOT,;3 pin;8 mm²-40°C to +85°CLead Free
MXD1812UR46-TNo Longer AvailableMXD1812UR46+TSOT,;3 pin;8 mm²-40°C to +85°CNo
MXD1812XR41+TActiveSC-70,;3 pin;5.3 mm²-40°C to +85°CLead Free
MXD1812XR41-TNo Longer AvailableMXD1812XR41+TSC-70,;3 pin;5.3 mm²-40°C to +85°CNo
MXD1812XR44+TActiveSC-70,;3 pin;5.3 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MXD1812XR44-TNo Longer AvailableMXD1812XR44+TSC-70,;3 pin;5.3 mm²-40°C to +85°CNo
MXD1812XR46+TActiveSC-70,;3 pin;5.3 mm²-40°C to +85°CLead Free
MXD1812XR46-TNo Longer AvailableMXD1812XR46+TSC-70,;3 pin;5.3 mm²-40°C to +85°CNo
MXD1810-MXD1818.pdf MXD1818
引脚配置 MXD1818