MAXIM MAX6615AEE+T

The MAX6615/MAX6616 monitor two temperature channels, either the internal die temperature and the temperature of an external thermistor, or the temperatures of two external thermistors. The temperature data controls a PWM output signal to adjust the speed of a cooling fan, thereby minimizing noise when the system is running cool, but providing maximum cooling when power dissipation increases. The fans’ tachometer output signals are monitored by the MAX6615/MAX6616 to detect fan failure. If a fan failure is detected, the FAN_FAIL output is asserted. The 2-wire serial interface accepts standard system management bus (SMBus) write byte, read byte, send byte, and receive byte commands to read the temperature data and program the alarm thresholds. The programmable alarm output can be used to generate interrupts, throttle signals, or overtemperature shutdown signals. The MAX6616 features six GPIOs to provide additional flexibility. All of the GPIOs power-up as inputs, with the exception of GPIO0, which powers up as either an input or an output as determined by connecting the PRESET pin to ground or VCC. The MAX6616 is available in a 24-pin QSOP package, while the MAX6615 is available in a 16-pin QSOP package. Both devices operate from a single-supply voltage range of 3.0V to 5.5V, have operating temperature ranges of -40℃ to +125℃, and consume just 500μA of supply current.

The MAX6615/MAX6616 accurately monitor two temperature channels, either the internal die temperature and the temperature of an external thermistor, or the temperatures of two external thermistors. They report temperature values in digital form using a 2-wire SMBus/I2C-compatible serial interface. The MAX6615/ MAX6616 operate from a supply voltage range of 3.0V to 5.5V and consume 500μA (typ) of supply current. The temperature data controls the duty cycles of two PWM output signals that are used to adjust the speed of a cooling fan. They also feature an overtemperature alarm output to generate interr

• Two Thermistor Inputs
• Two Open-Drain PWM Outputs for Fan-Speed Control
• Local Temperature Sensor
• Six GPIOs (MAX6616)
• Programmable Fan-Control Characteristics
• Controlled PWM Rate-of-Change Ensures Unobtrusive Fan-Speed Adjustments
• Fail-Safe System Protection
• OT Output for Throttling or Shutdown
• Nine Different Pin-Programmable SMBus Addresses
• 16-Pin and 24-Pin QSOP Packages

• Desktop Computers
• Servers
• Power Supplies
• Networking Equipment
• Workstations