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MAX6872：EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors with Charge-Pump Outputs

The MAX6872/MAX6873 EEPROM-configurable, multivoltage supply sequencers/supervisors monitor several voltage detector inputs and four general-purpose logic inputs. The MAX6872/MAX6873 feature programmable outputs for highly configurable power-supply sequencing applications. The MAX6872 features six voltage detector inputs and eight programmable outputs, while the MAX6873 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, open drain, 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 SMBus™-/I²C-compatible, serial data interface programs and communicates with the configuration EEPROM, the configuration registers, the internal 4kb user EEPROM, and the fault registers of the MAX6872/MAX6873. The MAX6872/MAX6873 are available in a 7mm x 7mm x 0.8mm, 32-pin TQFN package and operate over the extended -40°C to +85°C temperature range.

Key Features Six (MAX6872) or Four (MAX6873) 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 (MAX6872) or Two (MAX6873) Positive Voltage Inputs (+0.5V to +3.05V or +1V to +5.5V Thresholds) Four General-Purpose Logic Inputs Two Configurable Watchdog Timers Eight (MAX6872) or Five (MAX6873) Programmable Outputs Active-High, Active-Low, Open Drain, Weak Pullup, Push-Pull, Charge-Pump Timing Delays from 25µs to 1600ms Margining Disable and Manual Reset Controls 4kb Internal User EEPROM Endurance: 100,000 Erase/Write Cycles Data Retention: 10 Years I²C/SMBus-Compatible Serial Configuration/Communication Interface ±1% Threshold Accuracy

MAX6872, MAX6873: Typical Operating Circuit Applications/Uses Multimicroprocessor/Voltage Systems Networking Systems Servers and Workstations Storage Equipment Telecommunication/Central Office Systems Wireless Base Stations

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