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Numéro de sérieMAX6889
CategoriePower Management => Voltage References
DescriptionEEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors
The MAX6889/MAX6890/MAX6891 EEPROM-configurable, multivoltage supply sequencers/supervisors monitor several voltage detector inputs and general-purpose logic inputs and feature programmable outputs for highly configurable power-supply sequencing applications. The MAX6889 features eight voltage detector inputs and ten programmable outputs. The MAX6890 features six voltage detector inputs and eight programmable outputs, while the MAX6891 features four voltage detector inputs and five programmable outputs. Manual reset and margin disable inputs offer additional flexibility.
SociétéMaxim Integrated Products
DatasheetTélécharger MAX6889 datasheet
 
 
  • Description courte

  • o Eight (MAX6889), Six (MAX6890), or Four (MAX6891) Configurable Input Voltage Detectors High-Voltage Input to 13.2V) Six (MAX6889), Five (MAX6890), or Three (MAX6891) Voltage Inputs to 5.5V) Additional (MAX6889) High-Voltage Input 15.25V) o Four (MAX6889/MAX6890) or Three (MAX6891) General-Purpose Logic Inputs o Configurable Watchdog Timer o Ten (MAX6889), Eight (MAX6890), or Five (MAX6891) Programmable Outputs Active-High, Active-Low, Open Drain, Weak Pullup Timing Delays from 1600ms o Margining Disable and Manual Reset Controls o 512-Bit Internal User EEPROM Endurance: 100,000 Erase/Write Cycles Data Retention: 10 Years o I2C/SMBus-Compatible Serial Configuration/Communication Interface o ±1% Threshold Accuracy

    The MAX6889/MAX6890/MAX6891 EEPROM-configurable, multivoltage supply sequencers/supervisors monitor several voltage detector inputs and generalpurpose logic inputs and feature programmable outputs for highly configurable power-supply sequencing applications. The MAX6889 features eight voltage detector inputs and ten programmable outputs. The MAX6890 features six voltage detector inputs and eight programmable outputs, while the MAX6891 features four voltage detector inputs and five programmable outputs. Manual reset and margin disable inputs offer additional flexibility. All voltage detectors offer a configurable threshold for undervoltage detection. High-voltage input IN1 monitors voltages from in 50mV increments, or from in 25mV increments. Inputs IN2­IN7 monitor voltages from in 20mV increments or from in 10mV increments. High-voltage input IN8 monitors voltages from in 50mV increments, or from in 25mV increments. Programmable output stages control power-supply sequencing or system resets/interrupts. Programmable output options include: active-high, active-low, open drain, and weak pullup. Programmable timing delay blocks configure each output to wait between 25µs and 1600ms before deasserting. The MAX6889/MAX6890/MAX6891 feature a watchdog timer for added flexibility. Program the watchdog timer to assert one or more programmable outputs. The initial and normal watchdog timeout periods are independently programmable from SMBusTM/I2C-compatible, 2-wire serial data interface programs and communicates with the configuration EEPROM, the configuration registers, and the internal 512-bit user EEPROM. The MAX6889/MAX6890/MAX6891 are available x 0.8mm thin QFN packages and are specified to operate over the extended temperature range to +85°C).

    PART MAX6890ETI MAX6891ETP TEMP RANGE to +85°C PIN-PACKAGE 32 Thin QFN-EP* 28 Thin QFN-EP* 20 Thin QFN-EP*

    Applications

    Telecommunication/Central Office Systems Networking Systems Servers/Workstations Base Stations Storage Equipment Multi-Microprocessor/Voltage Systems

    Pin Configurations and Typical Operating Circuit appear at end of data sheet.

    For pricing, delivery, and ordering information, please contact Maxim Direct 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

    (All voltages referenced to GND.) IN2­IN7, VCC, SDA, SCL, A0, A1, GPI_ MR, to +3V Input/Output Current (all pins)..........................................±20mA Continuous Power Dissipation (TA +70°C) 20-Pin Thin QFN (derate 21.3mW/°C above +70°C)..............................................................1702mW 28-Pin Thin QFN (derate 21.3mW/°C above +70°C)..............................................................1702mW 32-Pin Thin QFN (derate 21.3mW/°C above +70°C)..............................................................1702mW Operating Temperature to +85°C Maximum Junction Temperature.....................................+150°C Storage Temperature to +150°C Lead Temperature (soldering, 10s).................................+300°C

    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.

    = 10V, GPI_ = GND, MARGIN MR = DBP, to +85°C, unless otherwise noted. Typical values are = +25°C.) (Notes 2, 3)

    PARAMETER SYMBOL VIN1 Operating Voltage Range (Note 4) CONDITIONS Voltage IN1 to ensure the device is fully operational, IN2­IN8 = GND Voltage on any one IN2­IN5 or VCC to ensure the device is fully operational, IN1 = GND VIN1P Minimum voltage IN1 to guarantee that the device is powered through IN1 Minimum voltage on one IN2­IN5 to guarantee the device is EEPROM configured No load IN2­IN8 = GND, no load Supply Current ICC Writing to configuration registers or EEPROM, no load VIN1 (50mV increments) VIN1 (25mV increments) VIN2­VIN7 (20mV increments) Threshold Voltage Range VTH VIN2­VIN7 (10mV increments) VIN8 (50mV increments) VIN8 (25mV increments) VIN2­VIN8 (high-Z mode in 3.3mV increments) MIN 4.0 TYP MAX 2.7 5.5 UNITS

    = 10V, GPI_ = GND, MARGIN MR = DBP, to +85°C, unless otherwise noted. Typical values are = +25°C.) (Notes 2, 3)

    PARAMETER SYMBOL CONDITIONS VIN_ 5.5V (20mV increments) to +85°C (VIN_ falling) VIN_ 2.5V (20mV increments) VIN_ 3.05V (10mV increments) VIN_ 1.25V (10mV increments) VIN_ 5.5V (20mV increments) to +85°C (VIN_ falling) VIN_ 2.5V (20mV increments) VIN_ 3.05V (10mV increments) VIN_ 1.25V (10mV increments) VIN_ to 15.25V for IN8) (50mV increments) to +85°C (VIN_ falling) VIN_ 6.25V (50mV increments) VIN_ 7.625V (25mV increments) VIN_ 3.125V (25mV increments) IN1/IN8 Threshold Accuracy VIN_ to 15.25V for IN8) (50mV increments) to +85°C (VIN_ falling) VIN_ 6.25V (50mV increments) VIN_ 7.625V (25mV increments) VIN_ 3.125V (25mV increments) IN_ Threshold Accuracy Threshold Hysteresis VTH-HYST IN_ 0.6V in high-Z mode (VIN_ falling) to 85°C MIN TYP MAX UNITS % mV