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MAX6843UKD_-T Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX6843UKD_-T Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 9 page Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors 4 _______________________________________________________________________________________ Pin Description Typical Operating Characteristics (continued) (VCC = 1.5V, TA = +25°C, unless otherwise noted.) NORMALIZED VCC RESET THRESHOLD vs. TEMPERATURE TEMPERATURE ( °C) 60 40 20 0 -20 0.990 0.995 1.000 1.005 1.010 1.015 0.985 -40 80 VTH = 0.833V NORMALIZED RESET IN THRESHOLD vs. TEMPERATURE TEMPERATURE ( °C) 60 40 20 0 -20 0.990 0.995 1.000 1.005 1.010 1.015 0.985 -40 80 POWER-UP/POWER-DOWN CHARACTERISTICS (MAX6843AUKD3) MAX6841-45 toc06 200ms/div VCC 1V/div RESET 1V/div PIN MAX6841 MAX6842 MAX6843 MAX6845 MAX6844 NAME FUNCTION 1 —— Push-Pull (MAX6841) or Open-Drain (MAX6842) Active-Low Reset Output. RESET changes from high to low when VCC drops below the selected reset threshold or MR is pulled low. RESET remains low for the reset timeout period after VCC exceeds the device reset threshold and MR is released high. — 1 — RESET Push-Pull (MAX6843) or Open-Drain (MAX6845) Active-Low Reset Output. RESET changes from high to low when RESET IN drops below the 187.4mV reset threshold (referenced to VCC) or MR is pulled low. RESET remains low for the reset timeout period after RESET IN exceeds the reset threshold and MR is released high. 2 2 2 GND Ground 3 —— Push-Pull Active-High Reset Output. RESET changes from low to high when VCC input drops below the selected reset threshold or MR is pulled low. RESET remains high for the reset timeout period after VCC exceeds the device reset threshold and MR is released high. —— 1 RESET Push-Pull Active-High Reset Output. RESET changes from low to high when the RESET IN input drops below the 187.4mV reset threshold (referenced to VCC). RESET remains high for the reset timeout period after RESET IN exceeds the reset threshold. — 3 3 RESET IN Adjustable Reset Input. High-impedance input for reset comparator. Connect this pin to an external resistive-divider network to set the reset threshold voltage; the typical threshold is 187.4mV (referenced to VCC). The MAX6843/MAX6844/ MAX6845 assert a reset signal when the VCC to RESET IN differential falls below its threshold voltage. 44 4 MR Active-Low Manual Reset Input. Internal 20k Ω pullup to VCC. Pull low to force a reset. Reset remains active as long as MR is low and for the reset timeout period after MR goes high. Leave unconnected or connect to VCC if unused. 55 5 VCC Supply Voltage. Monitored supply for the MAX6841/MAX6842. |
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