MAX6884/MAX6885 19-3594 Rev 0 2/05 EEPROM-Programmable, Hex Power-Supply Supervisory Circuits General Description Features The MAX6884/MAX6885 EEPROM-configurable, multi- 6 Configurable Input Voltage Detectors voltage power-supply supervisors monitor six voltage- Programmable Thresholds 0.5V to 3.05V detector inputs, one auxiliary input, and one watchdog (in 10mV Increments) or 1V to 5.8V (in 20mV input, and feature three programmable outputs for highly Increments) configurable power-supply monitoring applications. Primary UV and Secondary UV/OV Thresholds Manual reset and margin disable inputs offer additional flexibility. One Configurable Watchdog Timer from 6.25ms to 102.4s Each voltage-detector input offers a programmable pri- mary undervoltage and secondary undervoltage/over- Configurable RESET, UV/OV, and WDO Outputs voltage threshold. Voltage-detector inputs IN1IN6 Three Programmable Outputs monitor voltages from 1V to 5.8V in 20mV increments or Open-Drain or Weak Pullup RESET, UV/OV, 0.5V to 3.05V in 10mV increments. and WDO Programmable outputs RESET, UV/OV, and WDO pro- Active-Low Output Logic vide system resets/interrupts. Programmable output Timing Delays from 25s to 1600ms options include open-drain or weak pullup. Program- mable timing delay blocks configure each output to Margining Disable and Manual Reset Controls wait between 25s and 1600ms after their respective Internal 1.25V Reference or External Reference assertion-causing conditions have been cleared. A fault Input register logs condition-causing events (undervoltage, overvoltage, manual reset, etc.). 10-Bit Internal ADC Samples the Input Voltage An internal 10-bit, 1% accurate ADC (MAX6884 only) Detectors, V and Auxiliary Input CC converts the voltages at IN1IN6, AUXIN, and V CC 512-Bit User EEPROM through a multiplexer that automatically sequences Endurance: 100,000 Erase/Write Cycles 2 through all inputs every 200ms. An SMBus/I C-com- Data Retention: 10 Years patible serial data interface programs and communi- 2 cates with the configuration EEPROM, configuration SMBus/I C-Compatible Serial registers, internal 512-bit user EEPROM, and reads the Configuration/Communication Interface ADC registers (MAX6884 only) and fault registers. 1% Threshold Accuracy The MAX6884/MAX6885 are available in a 5mm x 5mm x 0.8mm 20-pin thin QFN package and operate over the extended temperature range (-40C to +85C). Ordering Information Applications PKG PART TEMP RANGE PIN-PACKAGE CODE Telecommunications/Central-Office Systems Networking Systems MAX6884ETP -40C to +85C 20 Thin QFN T2055-5 Servers/Workstations MAX6885ETP -40C to +85C 20 Thin QFN T2055-5 Base Stations Storage Equipment Pin Configurations and Typical Operating Circuit appear at Multimicroprocessor/Voltage Systems end of data sheet. Selector Guide VOLTAGE- PROGRAMMABLE PART INTERNAL ADC REFERENCE INPUT AUXILIARY INPUT DETECTOR INPUTS OUTPUTS MAX6884ETP 6 Yes 3 Yes Yes MAX6885ETP 6 No 3 No No 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 Power-Supply Supervisory Circuits ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Maximum Junction Temperature .....................................+150C IN1IN6, V , RESET, UV/OV, WDO........................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C CC WDI, MR, MARGIN, SDA, SCL, A0...........................-0.3V to +6V Storage Temperature Range .............................-65C to +150C AUXIN, DBP, REFIN .................................................-0.3V to +3V Lead Temperature (soldering, 10s) .................................+300C Input/Output Current (all pins)..........................................20mA Continuous Power Dissipation (T = +70C) A 20-Pin (5mm x 5mm) Thin QFN (derate 21.3mW/C above +70C).............................1702mW 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 V or V = 2.7V to 5.8V, AUXIN = WDI = GND, MARGIN = MR = DBP, T = -40C to +85C, unless otherwise noted. Typical IN1 IN4 CC A values are at T = +25C.) (Notes 1, 2, 3) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Voltage on either one of IN1IN4 or V to CC Operating Voltage Range 2.7 5.8 V guarantee the device is fully operational Minimum voltage on one of IN1IN4 or V CC Undervoltage Lockout V 2.5 V UVLO to guarantee device is EEPROM configured Digital Bypass Voltage V No load 2.48 2.55 2.67 V DBP V = 5.8V, IN2IN6 = GND, no load 0.9 1.2 mA IN1 Supply Current I CC Writing to configuration registers or 1.1 1.5 mA EEPROM, no load V V (in 20mV increments) 1.0 5.8 IN1 IN6 V V (in 10mV increments) 0.50 3.05 IN1 IN6 Threshold Range V V TH V V (Inputs high impedance IN1 IN6 0.167 1.017 in 3.3mV increments) V = 2.5V to 5.8V IN -1 +1 % (20mV increments) V = 1V to 2.5V IN -25 +25 mV T = +25C to (20mV increments) A +85C, (V falling) IN V = 1.25V to 3.05V IN -1 +1 % (10mV increments) V = 0.5V to 1.25V IN -12.5 +12.5 mV (10mV increments) IN1IN6 Threshold Accuracy V = 2.5V to 5.8V IN -1.5 +1.5 % (20mV increments) V = 1V to 2.5V IN -25 +25 mV T = -40C to (20mV increments) A +85C, (V falling) IN V = 1.25V to 3.05V IN -1.5 +1.5 % (10mV increments) V = 0.5V to 1.25V IN -12.5 +12.5 mV (10mV increments) 2 MAX6884/MAX6885