MAX6689EP34+

The MAX6689EP34+ belongs to MAX6689 which precision multichannel temperature sensor monitors its own temperature and the temperatures of up to six external diode-connected transistors. When the measured temperature of a channel exceeds the respective threshold, a status bit is set in one of the status registers. All temperature channels of MAX6689EP34+ have programmable alert thresholds. Channels 1, 4, 5, and 6 also have programmable overtemperature thresholds. Two open-drain outputs, OVERT and ALERT, assert corresponding to these bits in the status register. The MAX6689 is specified for an operating temperature range of -40°C to +125°C and is available in 20-pin QSOP and TSSOP packages. The 2-wire serial interface of MAX6689EP34+ supports the standard system management bus (SMBusTM)protocols: write byte, read byte, send byte, and receive byte for reading the temperature data and programming the alarm thresholds.

The features of MAX6689EP34+ can be summarized as (1)six thermal-diode inputs; (2)local temperature sensor; (3)1°C remote temperature accuracy (+60°C to +100°C); (4)temperature monitoring begins at POR for failsafe system protection; (5)ALERT and OVERT outputs for interrupts, throttling, and shutdown; (6)STBY input for hardware standby mode; (7)small, 20-pin QSOP and TSSOP packages; (8)2-wire smbus interface.

The absolute maximum ratings of MAX6689EP34+ are (1)VCC, SCK, SDA, ALERT, OVERT, STBY to GND: -0.3V to +6V; (2)DXP_ to GND: -0.3V to (VCC + 0.3V); (3)DXN_ to GND: -0.3V to +0.8V; (4)SDA, ALERT, OVERT current: -1mA to +50mA; (5)DXN current: ±1mA; (6)continuous power dissipation (TA = +70°C)20-pin QSOP (derate 9.1mW/°C above +70°C): 727.3mW / 20-pin TSSOP (derate 11.0mW/°C above +70°C): 879.1mW; (7)ESD protection (all pins, human body model): ±2000V; (8)operating temperature range: -40°C to +125°C; (9)junction temperature: +150°C; (10)storage temperature range: -60°C to +150°C; (11)lead temperature (soldering, 10s): +300°C.