MAXIM MAX6683AUB+

Features The MAX6683 system supervisor monitors multiple power-supply voltages, including its own, and also features an on-board temperature sensor. The MAX6683 converts voltages to an 8-bit code and temperatures to an 11-bit (10-bit-plus-sign) code using an analog-todigital converter (ADC). A multiplexer automatically sequences through the voltage and temperature measurements. The digitized signals are then stored in registers and compared to the over/underthreshold limits programmed over the SMBus/I2C-compatible 2- wire serial interface.

When a temperature measurement exceeds the programmed threshold, or when an input voltage falls outside the programmed voltage limits, the MAX6683 generates a latched interrupt output ALERT. Three interrupt modes are available for temperature excursions. These are default mode, one-time interrupt mode, and comparator mode. The ALERT output is cleared, except for temperature interrupts generated in comparator mode, by reading the Interrupt Status register (Table 5). The ALERT output can also be masked by writing to the appropriate bits in the Interrupt Mask register (Table 6) or by setting bit 1 of the Configuration register (Table 4) to zero. The MAX6683 SMBus/ I2C - compatible interface also responds to the SMB alert response address.

The MAX6683 is a voltage and temperature monitor designed to communicate through an SMBus/ I2C interface with an external microcontroller (μC). A μC with no built-in I2C or SMBus capabilities can generate SMBus serial commands by “bit-banging” general-purpose input-output (GPIO) pins.

• Monitors Local Temperature
• Monitors Three External Voltages (1.8V, 2.5V, 5V Nominal)
• Monitors VCC (3.3V Nominal)
• User-Programmable Voltage and Temperature Thresholds
• Alert Function with Ability to Respond to SMB Alert Response Address
• +2.7V to +5.5V Supply Range
• -40℃ to +125℃ Temperature Range
• 60Hz or 50Hz Line-Frequency Rejection
• Tiny 10-Pin µMAX Package
• MAX6683EVKIT Available

• Workstations
• Servers
• Networking
• Telecommunications