MAX1619MEE Maxim Integrated Products, MAX1619MEE Datasheet - Page 19
MAX1619MEE
Manufacturer Part Number
MAX1619MEE
Description
IC TEMP SENSOR W/ALARM 16-QSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX1619MEE.pdf
(20 pages)
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
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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