MAX6889/MAX6890/MAX6891 19-3595 Rev 1 9/08 EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors General Description Features The MAX6889/MAX6890/MAX6891 EEPROM-config- Eight (MAX6889), Six (MAX6890), or Four urable, multivoltage supply sequencers/supervisors (MAX6891) Configurable Input Voltage Detectors monitor several voltage detector inputs and general- High-Voltage Input (1.25V to 7.625V or purpose logic inputs and feature programmable out- 2.5V to 13.2V) puts for highly configurable power-supply sequencing Six (MAX6889), Five (MAX6890), or Three applications. The MAX6889 features eight voltage (MAX6891) Voltage Inputs (0.5V to 3.05V or detector inputs and ten programmable outputs. The 1V to 5.5V) MAX6890 features six voltage detector inputs and eight Additional (MAX6889) High-Voltage Input programmable outputs, while the MAX6891 features (1.25V to 7.625V or 2.5V to 15.25V) four voltage detector inputs and five programmable outputs. Manual reset and margin disable inputs offer Four (MAX6889/MAX6890) or Three (MAX6891) additional flexibility. General-Purpose Logic Inputs All voltage detectors offer a configurable threshold for Configurable Watchdog Timer undervoltage detection. High-voltage input IN1 monitors Ten (MAX6889), Eight (MAX6890), or Five voltages from 2.5V to 13.2V in 50mV increments, or from 1.25V to 7.625V in 25mV increments. Inputs IN2IN7 (MAX6891) Programmable Outputs monitor voltages from 1V to 5.5V in 20mV increments or Active-High, Active-Low, Open Drain, Weak from 0.5V to 3.05V in 10mV increments. High-voltage Pullup input IN8 monitors voltages from 2.5V to 15.25V in 50mV Timing Delays from 25s to 1600ms increments, or from 1.25V to 7.625V in 25mV increments. Margining Disable and Manual Reset Controls Programmable output stages control power-supply sequencing or system resets/interrupts. Programmable 512-Bit Internal User EEPROM output options include: active-high, active-low, open Endurance: 100,000 Erase/Write Cycles drain, and weak pullup. Programmable timing delay Data Retention: 10 Years blocks configure each output to wait between 25s and 2 I C/SMBus-Compatible Serial 1600ms before deasserting. Configuration/Communication Interface The MAX6889/MAX6890/MAX6891 feature a watchdog timer for added flexibility. Program the watchdog timer 1% Threshold Accuracy to assert one or more programmable outputs. The initial and normal watchdog timeout periods are indepen- dently programmable from 6.25ms to 102.4s. Ordering Information 2 An SMBus/I C-compatible, 2-wire serial data inter- PART TEMP RANGE PIN-PACKAGE face programs and communicates with the configura- MAX6889ETJ -40C to +85C 32 Thin QFN-EP* tion EEPROM, the configuration registers, and the internal 512-bit user EEPROM. MAX6890ETI -40C to +85C 28 Thin QFN-EP* The MAX6889/MAX6890/MAX6891 are available in MAX6891ETP -40C to +85C 20 Thin QFN-EP* 5mm x 5mm x 0.8mm thin QFN packages and are *EP = Exposed pad. specified to operate over the extended temperature range (-40C to +85C). Applications Telecommunication/Central Office Systems Networking Systems Pin Configurations and Typical Operating Circuit appear at end of data sheet. Servers/Workstations Base Stations Storage Equipment Multi-Microprocessor/Voltage Systems SMBus is a trademark of Intel Corp. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLEEEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) 28-Pin Thin QFN (derate 21.3mW/C IN2IN7, V , SDA, SCL, A0, A1, GPI above +70C)..............................................................1702mW CC MR, MARGIN.........................................................-0.3V to +6V 32-Pin Thin QFN (derate 21.3mW/C IN1, PO .................................................................-0.3V to +14V above +70C)..............................................................1702mW IN8..........................................................................-0.3V to +20V Operating Temperature Range ...........................-40C to +85C DBP ..........................................................................-0.3V to +3V Maximum Junction Temperature .....................................+150C Input/Output Current (all pins)..........................................20mA Storage Temperature Range .............................-65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A 20-Pin 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 = 6.5V to 13.2V, V V = 2.7V to 5.5V, V = 10V, GPI = GND, MARGIN = MR = DBP, T = -40C to +85C, unless other- IN1 IN2 IN7 IN8 A wise noted. Typical values are at T = +25C.) (Notes 1, 2, 3) A PARAMETER SYMB O L CONDITIONS MINTYPMAXUNITS Voltage on IN1 to ensure the device is fully V 4.0 13.2 IN1 operational, IN2IN8 = GND Operating Voltage Range V Voltage on any one of IN2IN5 or V to CC (Note 4) 2.7 5.5 ensure the device is fully operational, IN1 = GND Minimum voltage on IN1 to guarantee that IN1 Supply Voltage (Note 4) V 6.5 V IN1P the device is powered through IN1 Minimum voltage on one of IN2IN5 to Undervoltage Lockout V guarantee the device is EEPROM 2.5 V UVLO configured Digital Bypass Voltage V No load 2.48 2.55 2.67 V DBP V = 13.2V, IN2IN8 = GND, no load 1 1.2 mA IN1 Supply Current I CC Writing to configuration registers or 1.1 1.5 mA EEPROM, no load V (50mV increments) 2.5 13.2 IN1 V (25mV increments) 1.25 7.625 IN1 V V (20mV increments) 1.0 5.5 IN2 IN7 V V (10mV increments) 0.50 3.05 IN2 IN7 Threshold Voltage Range V V TH V (50mV increments) 2.50 15.25 IN8 V (25mV increments) 1.250 7.625 IN8 V V (high-Z mode in 3.3mV IN2 IN8 0.167 1.017 increments) 2 MAX6889/MAX6890/MAX6891