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MAX16043TG Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX16043TG Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 15 page Dual-/Triple-/Quad-Voltage, Capacitor- Adjustable, Sequencing/Supervisory Circuits _______________________________________________________________________________________ 7 Pin Description (continued) PIN MAX16041 MAX16042 MAX16043 NAME FUNCTION 11 14 17 OUT1 Output 1. When the voltage at IN1 is below its threshold or EN1 goes low, OUT1 goes low. 12 15 18 RESET Active-Low Reset Output. RESET asserts low when any of the monitored voltages (IN_) falls below its respective threshold, any EN_ goes low, or MR is asserted. RESET remains asserted for the reset timeout period after all of the monitored voltages exceed their respective threshold, all EN_ are high, all OUT_ are high, and MR is deasserted. 13 16 19 MR Active-Low Manual Reset Input. Pull MR low to assert RESET low. RESET remains low for the reset timeout period after MR is deasserted (as long as all OUT_ are high). 14 17 20 CRESET Capacitor-Adjustable Reset Delay Input. Connect an external capacitor from CRESET to GND to set the reset timeout period or connect to VCC for the default 140ms minimum reset timeout period. Leave CRESET open for internal propagation delay. — — 21 CDLY4 Capacitor-Adjustable Delay Input 4. Connect an external capacitor from CDLY4 to GND to set the IN4 to OUT4 (and EN4 to OUT4) delay period. Leave CDLY4 open for internal propagation delay. — 18 22 CDLY3 Capacitor-Adjustable Delay Input 3. Connect an external capacitor from CDLY3 to GND to set the IN3 to OUT3 (and EN3 to OUT3) delay period. Leave CDLY3 open for internal propagation delay. 15 19 23 CDLY2 Capacitor-Adjustable Delay Input 2. Connect an external capacitor from CDLY2 to GND to set the IN2 to OUT2 (and EN2 to OUT2) delay period. Leave CDLY2 open for internal propagation delay. 16 20 24 CDLY1 Capacitor-Adjustable Delay Input 1. Connect an external capacitor from CDLY1 to GND to set the IN1 to OUT1 (and EN1 to OUT1) delay period. Leave CDLY1 open for internal propagation delay. —— — EP Exposed Pad. EP is internally connected to GND. Connect EP to the ground plane. Detailed Description The MAX16041/MAX16042/MAX16043 are low-voltage, accurate, dual-/triple-/quad-voltage microprocessor (µP) supervisors in a small TQFN package. These devices provide supervisory and sequencing functions for complex multivoltage systems. The MAX16041 mon- itors two voltages, the MAX16042 monitors three volt- ages, and the MAX16043 monitors four voltages. The MAX16041/MAX16042/MAX16043 offer indepen- dent outputs and enable functions for each monitored voltage. This configuration allows the device to operate as four separate supervisory circuits or be daisy-chained together to allow controlled sequencing of power supplies during power-up initialization. When all of the monitored voltages exceed their respective thresholds, an inde- pendent reset output deasserts to allow the system processor to operate. These devices offer enormous flexibility as there are nine threshold options that are selected through two threshold-select logic inputs. Each monitor circuit also offers an independent enable input to allow both digital and analog control of each monitor output. A tolerance select input allows these devices to be used in systems requiring 5% or 10% power-supply tolerances. In addi- tion, the time delays and reset timeout can be adjusted using small capacitors. There is also a fixed 140ms minimum reset timeout feature. |
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