Analog Devices Inc./Maxim Integrated

The MXD1210 nonvolatile RAM controller is a very low-power CMOS circuit that converts standard (volatile) CMOS RAM into nonvolatile memory. It also continually monitors the power supply to provide RAM write protection when power to the RAM is in a marginal (out-of-tolerance) condition. When the power supply begins to fail, the RAM is write protected, and the device switches to battery-backup mode.ApplicationsµP-Controlled SystemsComputers: Desktop, Workstation, ServerEmbedded Systems

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 VCCsupply voltage declines below a preset threshold, keeping reset asserted for at least 100ms after VCCrises 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 VCCdown 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.ApplicationsComputers and ControllersCritical µP and µC MonitoringIntelligent InstrumentsPortable Battery-Powered EquipmentPrintersSet-Top Boxes

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 VCCsupply voltage declines below a preset threshold, keeping reset asserted for at least 100ms after VCCrises 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 VCCdown 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.ApplicationsComputers and ControllersCritical µP and µC MonitoringIntelligent InstrumentsPortable Battery-Powered EquipmentPrintersSet-Top Boxes

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 VCCsupply voltage declines below a preset threshold, keeping reset asserted for at least 100ms after VCCrises 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 VCCdown 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.ApplicationsComputers and ControllersCritical µP and µC MonitoringIntelligent InstrumentsPortable Battery-Powered EquipmentPrintersSet-Top Boxes