MAX6870/MAX6871 19-3384 Rev 1 9/04 EEPROM-Programmable Hex/Quad Power-Supply Sequencers/Supervisors with ADC General Description Features The MAX6870/MAX6871 EEPROM-configurable, multi- Six (MAX6870) or Four (MAX6871) Configurable voltage supply sequencers/supervisors monitor several Input Voltage Detectors voltage detector inputs, two auxiliary inputs, and four One High Voltage Input (+1.25V to +7.625V or general-purpose logic inputs. The MAX6870/MAX6871 +2.5V to +13.2V Thresholds) feature programmable outputs for highly configurable One Bipolar Voltage Input (1.25V to 7.625V power-supply sequencing applications. The MAX6870 or 2.5V to 15.25V Thresholds) features six voltage detector inputs and eight program- Four (MAX6870) or Two (MAX6871) Positive mable outputs, while the MAX6871 features four voltage Voltage Inputs (+0.5V to +3.05V or +1V to detector inputs and five programmable outputs. Manual +5.5V Thresholds) reset and margin disable inputs offer additional flexibility. Four General-Purpose Logic Inputs All voltage detectors offer two configurable thresholds Two Configurable Watchdog Timers for undervoltage/overvoltage or dual undervoltage Eight (MAX6870) or Five (MAX6871) detection. One high voltage input (IN1) provides detec- Programmable Outputs tor threshold voltages from +2.5V to +13.2V in 50mV Active-High, Active-Low, Open-Drain, Weak increments, or from +1.25V to +7.625V in 25mV incre- Pullup, Push-Pull, Charge-Pump ments. A bipolar input (IN2) provides detector threshold Timing Delays from 25s to 1600ms voltages from 2.5V to 15.25V in 50mV increments, or from 1.25V to 7.625V in 25mV increments. Positive 10-Bit Internal ADC Monitors the Input Voltage inputs (IN3IN6) provide detector threshold voltages Detectors and Two Auxiliary Inputs from +1V to +5.5V in 20mV increments, or from +0.5V Margining Disable and Manual Reset Controls to +3.05V in 10mV increments. Internal 1.25V Reference or External Reference Programmable output stages control power-supply Input sequencing or system resets/interrupts. Programmable 4kb Internal User EEPROM output options include: active-high, active-low, open- Endurance: 100,000 Erase/Write Cycles drain, weak pullup, push-pull, and charge pump. Data Retention: 10 Years Programmable timing delay blocks configure each output 2 to wait between 25s and 1600ms before deasserting. A I C/SMBus-Compatible Serial fault register logs the condition that caused each output Configuration/Communication Interface to assert (undervoltage, overvoltage, manual reset, etc.). 1% Threshold Accuracy An internal 10-bit ADC monitors the voltage detector inputs, and two auxiliary inputs through a multiplexer that automatically sequences through all inputs every TM 2 T 200ms. A SMBus -/I C -compatible, serial data inter- face programs and communicates with the configuration Ordering Information EEPROM, the configuration registers, the internal 4kb user EEPROM, the ADC registers, and the fault registers PIN- PKG PART TEMP RANGE of the MAX6870/MAX6871. PACKAGE CODE The MAX6870/MAX6871 are available in a 7mm x 7mm MAX6870ETJ -40C to +85C 32 Thin QFN T3277-2 x 0.8mm 32-pin thin QFN package and operate over MAX6871ETJ -40C to +85C 32 Thin QFN T3277-2 the extended -40C to +85C temperature range. Applications Telecommunications/Central Office Systems Networking Systems SMBus is a trademark of Intel Corp. Servers/Workstations Basestations Storage Equipment Multimicroprocessor/Voltage Systems Pin Configurations, Typical Operating Circuit, and Selector Guide appear at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLEEEPROM-Programmable Hex/Quad Power-Supply Sequencers/Supervisors with ADC ABSOLUTE MAXIMUM RATINGS All Voltages referenced to GND Continuous Power Dissipation (T = +70C) A IN3IN6, ABP, SDA, SCL, A0, A1, 32-Pin 7mm x 7mm Thin QFN GPI1GPI4, MR, MARGIN, PO5PO8 (derate 33.3mW/C above +70C).............................2667mW (MAX6870), PO3/PO4/PO5 (MAX6871)............-0.3V to +6V Operating Temperature Range ...........................-40C to +85C IN1, PO1PO4 (MAX6870), PO1/PO2 (MAX6871)....-0.3V to +14V Maximum Junction Temperature .....................................+150C IN2...........................................................................-20V to +20V Storage Temperature Range .............................-65C to +150C DBP, AUXIN1, AUXIN2, REFIN.................................-0.3V to +3V Lead Temperature (soldering, 10s) .................................+300C Input/Output Current (all pins)..........................................20mA Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +6.5V to +13.2V, V = +10V, V to V = +2.7V to +5.5V, AUXIN = GPI = GND, MARGIN = MR = DBP, T = -40Cto IN1 IN2 IN3 IN6 A +85C, unless otherwise noted. Typical values are at T = +25C.) (Notes 1 and 2) A PARAMETER SYMB O L CONDITIONS MIN TYP MAX UNITS Voltage on IN1 to ensure the device is fully V 4.0 13.2 IN1 operational, IN3 to IN6 = GND Operating Voltage Range V (Note 3) V to Voltage on any one of IN3 to IN6 to ensure IN3 2.7 5.5 V the device is fully operational, IN1 = GND IN6 IN1 Supply Voltage Minimum voltage on IN1 to guarantee that the V 6.5 V IN1P (Note 3) device is powered through IN1 Minimum voltage on one of IN3 to IN6 to Undervoltage Lockout V 2.5 V UVLO guarantee the device is EEPROM configured. V = +13.2V, IN2 to IN6 = GND, no load 1.2 1.5 IN1 Supply Current I mA CC Writing to configuration registers or EEPROM, 1.3 2 no load V (50mV increments) 2.5 13.2 IN1 V (25mV increments) 1.250 7.625 IN1 V (50mV increments) 2.50 15.25 IN2 Threshold Range V V TH V (25mV increments) 1.250 7.625 IN2 V to V (20mV increments) 1.0 5.5 IN3 IN6 V to V (10mV increments) 0.50 3.05 IN3 IN6 T = +25C-1.0 +1.0 IN1 to IN6 positive, A V falling IN T = -40C to +85C -1.5 +1.5 A % T = +25C-1.5 +1.5 -15.25V V -5V, A IN2 Threshold Accuracy V falling IN2 T = -40C to +85C -2 +2 A T = +25C -75 +75 -5V V 0, V A IN2 IN2 mV falling T = -40C to +85C -100 +100 A Threshold Hysteresis V 0.3 % V TH-HYST TH Reset Threshold Temperature ppm/ V /C 10 TH Coefficient C Threshold-Voltage Differential V DNL -1 +1 LSB TH Nonlinearity 2 MAX6870/MAX6871