MAX6654MEE+

MAX6654MEE+ is a precise digital thermometer that reports the temperature of both a remote P-N junction and its own die. The remote junction can be a diode-connected transistor typically a low-cost, easily mounted 2N3904 NPN type or 2N3906 PNP type that replaces conventional thermistors or thermocouples. Remote accuracy is ±1°C for multiple transistor manufacturers, with no calibration needed. The remote junction can also be a common-collector PNP, such as a substrate PNP of a microprocessor (µP). The 2-wire serial interface accepts standard system management bus (SMBus), write byte, read byte, send byte, and receive byte commands to program the alarm thresholds and to read temperature data. It is used in applications such as desktop computers, notebook computers, servers, thin clients, workstations, test and measurement, and multichip modules.

• Dual channel: measures remote and local temperature
• Programmable under/overtemperature alarms
• I²C™-compatible/SMBus interface, no calibration required
• Line regulation is 0.2°C typical at (VCC = +3V to +5.5V, TA = -55°C to +125°C)
• Supply voltage range from +3.0V to +5.5V
• Standby current is 90mV typical at (SMBus static, VCC = +3V to +5.5V, TA = -55°C to +125°C)
• Operating current is 1mA maximum at (VCC = +3V to +5.5V, TA = -55°C to +125°C)
• Conversion time is +125ms typical at (VCC = +3V to +5.5V, TA = -55°C to +125°C)
• Operating temperature range from -55°C to +125°C
• 16-pin QSOP package

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