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DS1233A-10 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS1233A-10 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 5 page 1 of 5 041002 FEATURES § Automatically restarts microprocessor after power failure § Maintains active-high reset for 350 ms after VCC returns to an in-tolerance condition § Accurate 5%, 10% or 15% microprocessor 5V power supply monitoring § Reduces need for discrete components § Precision temperature-compensated voltage reference and voltage sensor § Low-cost TO-92 package or surface mount SOT-223 package § Internal 5k pull-up resistor § Operating temperature of -40°C to +85°C PIN ASSIGNMENT PIN DESCRIPTION PIN 1 Ground PIN 2 Reset PIN 3 VCC PIN 4 Ground (SOT-223 only) DESCRIPTION The DS1833 EconoReset uses a precision temperature compensated reference and comparator circuit to monitor the status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal power fail signal is generated which forces reset to the active (high) state. When VCC returns to an in- tolerance condition, the reset signal is kept in the active state for approximately 350 ms to allow the power supply and processor to stabilize. OPERATION - POWER MONITOR The DS1833 provides the functions of detecting out-of-tolerance power supply conditions and warning a processor-based system of impending power failure. When VCC is detected as out-of-tolerance, as defined by the tolerance of the part selected, the RST signal is asserted. On power-up, RST is kept active for approximately 350 ms after the power supply has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RST is released. DS1833 5V EconoReset www.maxim-ic.com 1 2 3 1 2 3 BOTTOM VIEW TO-92 PACKAGE See Mech. Drawings Section On Website 2 3 4 TOP VIEW SOT-23 PACKAGE See Mech. Drawings Section On Website 1 DALLAS DS1833 Econo Reset |
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