MAX6873

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 of MAX6873 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) of MAX6873 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 (IN3IN6) 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 of MAX6873 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 of MAX6873 configure each outpu 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 SMBusTM-/I2CTM-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 thin QFN package and operate over the extended -40°C to +85°C temperature range.