DescriptionThe MAX6622 is specified for a -40°C to +125°C operating temperature range and is available in a 16-pin TSSOP package. The MAX6622 precision multichannel temperature sensor monitors its own temperature and the temperatures of up to four 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. Two open-drain outputs, OVERT and ALERT, assert corresponding to these bits in the status register. All temperature channels have programmable alert thresholds. Channels 1 and 4 also have programmable overtemperature thresholds. The 2-wire serial interface of MAX6622 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 MAX6622 can be summarized as (1)four 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, 16-pin TSSOP package; (8)2-wire SMBus interface; (9)penryn CPU-compatible; (10)pinand register-compatible with MAX6602.
The absolute maximum ratings of MAX6622 are (1)VCC, SMBCLK, SMBDATA, ALERT, OVERT, STBY to GND: -0.3V to +6V; (2)DXP_ to GND: -0.3V to (VCC + 0.3V); (3)DXN2, DXN3, DXN4 to GND: -0.3V to +0.8V; (4)SMBDATA, ALERT, OVERT current: -1mA to +50mA; (5)DXN current: ±1mA; (6)continuous power dissipation (TA = +70°C)16-Pin TSSOP (derate 11.1mW/°C above +70°C): 888.9mW; (7)junction-to-case thermal resistance (JC)16-pin TSSOP: 27°C/W; (8)junction-to-ambient thermal resistance (JA)(Note A)16-pin TSSOP: 90°C/W; (9)ESD protection (all pins, human body model): ±2000V; (10)operating temperature range: -40°C to +125°C; (11)junction temperature: +150°C; (12)storage temperature range: -60°C to +150°C; (13)lead temperature (soldering, 10s): +300°C.
MAX6622 Data Sheet
