Analog Devices Inc./Maxim Integrated

The LTC2904/LTC2905 are dual supply monitors intended for systems with two supply voltages. The dual supply monitors have a common reset output with delay (200ms for the LTC2904 and adjustable using an external capacitor for the LTC2905). This product provides a precise, space-conscious and micropower solution for supply monitoring.The LTC2904/LTC2905 feature a tight 1.5% threshold accuracy over the whole operating temperature range, and glitch immunity to ensure reliable reset operation without false triggering. The open drainRSToutput is guaranteed to be in the correct state for inputs down to 1V.The LTC2904/LTC2905 also feature three programming input pins, which program the threshold and tolerance level without requiring any external components. These three programming pins provide a total of 27 different voltage level and tolerance combinations, eliminating the need to have different parts for development and implementation of different systems with different voltage levels requiring monitoring function.ApplicationsDesktop and Notebook ComputersHandheld DevicesNetwork ServersCore, I/O Monitor

The LTC2906/LTC2907 are dual supply monitors intended for systems with multiple supply voltages. The dual supply monitors have a common reset output with delay (200ms for the LTC2906 and adjustable using an external capacitor for the LTC2907). These products provide a precise, space-conscious and micropower solution for supply monitoring.The LTC2906/LTC2907 feature a tight 1.5% threshold accuracy over the whole operating temperature range and glitch immunity to ensure reliable reset operation without false triggering. The open drain RST output state is guaranteed to be in the correct state for V1 and/or VCCdown to 1V.The LTC2906/LTC2907 also feature one adjustable input with a nominal threshold level at 0.5V, another input with three possible input threshold levels, and three supply tolerances for possible margining. These features provide versatility for any kind of system requiring dual supply monitors. Two three-state input pins program the threshold and tolerance level without requiring any external components.ApplicationsDesktop and Notebook ComputersHandheld DevicesNetwork ServersCore, I/O Monitor

The LTC2912 voltage monitor is designed to detect power supply undervoltage and overvoltage events. The VL and VH monitor inputs include filtering to reject brief glitches, thereby ensuring reliable reset operation without false or noisy triggering. An adjustable timer defines the duration of the overvoltage and undervoltage reset outputs which function independently. While the LTC2912 operates directly from 2.3V to 6V supplies, an internal VCCshunt regulator coupled with low supply current demand allows operation from higher voltages such as 12V, 24V or 48V.Three output configurations are available: the LTC2912‑1 has a latch control for theOVoutput; the LTC2912-2 has anOVandUVoutput disable feature for margining applications; the LTC2912-3 is identical to the LTC2912-1 but with a noninverting,OVoutput.The LTC2912 provides a precise, versatile, space-conscious micropower solution for voltage monitoring.ApplicationsDesktop and Notebook ComputersNetwork ServersCore, I/O Voltage Monitors