MAX1619MEE Maxim Integrated Products, MAX1619MEE Datasheet - Page 19

• Manufacturer Part Number: MAX1619MEE
• Description: IC TEMP SENSOR W/ALARM 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1619MEE

• Function: Thermometer, Thermostat
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -55°C ~ 125°C, External Sensor
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Listing 1 gives an untested example of pseudocode for
proportional temperature control of Intel mobile CPUs
through a power-management microcontroller. This
program consists of two main parts: an initialization rou-
tine and an interrupt handler. The initialization routine
checks for SMBus communications problems and sets
up the MAX1619 configuration and conversion rate. The
interrupt handler responds to ALERT signals by reading
the current temperature and setting a CPU clock duty
factor proportional to that temperature. The relationship
between clock duty and temperature is fixed in a look-
up table contained in the microcontroller code.
Listing 1. Pseudocode Example (continued)
Remote/Local Temperature Sensor with Dual-
Clock-Throttling Control for CPUs
Alarm Outputs and SMBus Serial Interface
______________________________________________________________________________________
Programming Example:
Note: Thermal management decisions should be made
based on the latest external temperature obtained from
the MAX1619 rather than the value of the Status Byte.
The MAX1619 responds very quickly to changes in its
environment due to its sensitivity. High and low alarm
conditions can exist at the same time in the Status Byte
due to the MAX1619 correctly reporting environmental
changes around it.
TRANSISTOR COUNT: 11,487
Chip Information
19