DS1621
DS1621 FUNCTIONAL BLOCK DIAGRAM
Figure 1
STATUS REGISTER &
CONTROL LOGIC
SCL
ADDRESS
AND
I/O CONTROL
SDA
TEMPERATURE SENSOR
HIGH TEMP TRIGGER, TH
A0
A1
A2
LOW TEMP TRIGGER, TL
DIGITAL COMPARATOR/LOGIC
T
OUT
TEMPERATURE MEASURING CIRCUITRY
Figure 2
SLOPE ACCUMULATOR
PRESET
COMPARE
LOW TEMPERATURE
COEFFICIENT OSCILLATOR
COUNTER
PRESET
SET/CLEAR
LSB
INC
=0
TEMPERATURE REGISTER
HIGH TEMPERATURE
COEFFICIENT OSCILLATOR
COUNTER
=0
STOP
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