Overview

Features and Benefits

  • Six (MAX6870) or Four (MAX6871) Configurable Input Voltage Detectors
    • One High Voltage Input (+1.25V to +7.625V or +2.5V to +13.2V Thresholds)
    • One Bipolar Voltage Input (±1.25V to ±7.625V or ±2.5V to ±15.25V Thresholds)
    • Four (MAX6870) or Two (MAX6871) Positive Voltage Inputs (+0.5V to +3.05V or +1V to +5.5V Thresholds)
  • Four General-Purpose Logic Inputs
  • Two Configurable Watchdog Timers
  • Eight (MAX6870) or Five (MAX6871) Programmable Outputs
    • Active-High, Active-Low, Open-Drain, Weak Pullup, Push-Pull, Charge-Pump
    • Timing Delays from 25µs to 1600ms
  • 10-Bit Internal ADC Monitors the Input Voltage Detectors and Two Auxiliary Inputs
  • Margining Disable and Manual Reset Controls
  • Internal 1.25V Reference or External Reference Input
  • 4kb Internal User EEPROM
    • Endurance: 100,000 Erase/Write Cycles
    • Data Retention: 10 Years
  • I²C/SMBus-Compatible Serial Configuration/Communication Interface
  • ±1% Threshold Accuracy

Product Details

The MAX6870/MAX6871 EEPROM-configurable, multivoltage supply sequencers/supervisors monitor several voltage detector inputs, two auxiliary inputs, and four general-purpose logic inputs. The MAX6870/MAX6871 feature programmable outputs for highly configurable power-supply sequencing applications. The MAX6870 features six voltage detector inputs and eight programmable outputs, while the MAX6871 features four voltage detector inputs and five programmable outputs. Manual reset and margin disable inputs offer additional flexibility.

All voltage detectors offer two configurable thresholds for undervoltage/overvoltage or dual undervoltage detection. One high voltage input (IN1) provides detector threshold voltages from +2.5V to +13.2V in 50mV increments, or from +1.25V to +7.625V in 25mV increments. A bipolar input (IN2) provides detector threshold voltages from ±2.5V to ±15.25V in 50mV increments, or from ±1.25V to ±7.625V in 25mV increments. Positive inputs (IN3–IN6) provide detector threshold voltages from +1V to +5.5V in 20mV increments, or from +0.5V to +3.05V in 10mV increments.

Programmable output stages control power-supply sequencing or system resets/interrupts. Programmable output options include: active-high, active-low, opendrain, weak pullup, push-pull, and charge pump. Programmable timing delay blocks configure each output to wait between 25µs and 1600ms before deasserting. A fault register logs the condition that caused each output to assert (undervoltage, overvoltage, manual reset, etc.).

An internal 10-bit ADC monitors the voltage detector inputs, and two auxiliary inputs through a multiplexer that automatically sequences through all inputs every 200ms. A SMBus™-/I²C-compatible, serial data interface programs and communicates with the configuration EEPROM, the configuration registers, the internal 4kb user EEPROM, the ADC registers, and the fault registers of the MAX6870/MAX6871.

The MAX6870/MAX6871 are available in a 7mm x 7mm x 0.8mm 32-pin thin QFN package and operate over the extended -40°C to +85°C temperature range.

Applications

  • Base Stations
  • Multimicroprocessor/Voltage Systems
  • Networking Systems
  • Servers and Workstations
  • Storage Equipment
  • Telecommunication/Central Office Systems

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

Tools & Simulations

Product Recommendations

MAX6870 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Sample & Buy


Ordering FAQs


See our Ordering FAQs for answers to questions about online orders, payment options and more.

 

Buy Now Pricing


(**) Displayed Buy Now Price and Price Range is based on small quantity orders.

 

List Pricing


(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

 

Lead Times


Please see the latest communication from our CCO regarding lead times.

 

Sampling


Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


Price Table Help