DS1621 Maxim Integrated Products, DS1621 Datasheet - Page 12

• Manufacturer Part Number: DS1621
• Description: IC THERMOMETER/STAT DIG 8-DIP
• Manufacturer: Maxim Integrated Products

Specifications of DS1621

• Function: Thermometer, Thermostat
• Topology: ADC (Sigma Delta), Comparator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Full Temp Accuracy: +/- 2 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 12 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MEMORY FUNCTION EXAMPLE
Example: Bus master sets up DS1621 for continuous conversion and thermostatic function.
BUS MASTER
MODE
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
DS1621
MODE
RX
RX
TX
RX
TX
RX
TX
RX
RX
TX
RX
TX
RX
TX
RX
TX
RX
RX
TX
RX
TX
RX
TX
RX
TX
RX
RX
TX
RX
TX
RX
DATA (MSB
<address,0>
<address,0>
<address,0>
<address,0>
FIRST)
START
START
START
START
STOP
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACh
A1h
A2h
0Ah
EEh
02h
28h
00h
00h
Bus Master initiates a START condition.
Bus Master sends DS1621 address; R/
DS1621 generates acknowledge bit.
Bus Master sends Access Config command protocol.
DS1621 generates acknowledge bit.
Bus Master sets up DS1621 for output polarity active
high, continuous conversion.
DS1621 generates acknowledge bit.
Bus Master generates a repeated START condition.
Bus Master sends DS1621 address; R/
DS1621 generates acknowledge bit.
Bus Master sends Access TH command.
DS1621 generates acknowledge bit.
Bus Master sends first byte of data for TH limit of
+40°C.
DS1621 generates acknowledge bit.
Bus Master sends second byte of data for TH limit of
+40°C.
DS1621 generates acknowledge bit.
Bus Master generates a repeated START condition.
Bus Master sends DS1621 address; R/
DS1621 generates acknowledge bit.
Bus Master sends Access TL command.
DS1621 generates acknowledge bit.
Bus Master sends first byte of data for TL limit of
+10°C.
DS1621 generates acknowledge bit.
Bus Master sends second byte of data for TL limit of
+10°C.
DS1621 generates acknowledge bit.
Bus Master generates a repeated START condition.
Bus Master sends DS1621 address; R/
DS1621 generates acknowledge bit.
Bus Master sends Start Convert T command protocol.
DS1621 generates acknowledge bit.
Bus Master initiates STOP condition.
12 of 16
COMMENTS
W
W
W
W
= 0.
= 0.
= 0.
= 0.