DS1621S+T&R Maxim Integrated Products, DS1621S+T&R Datasheet - Page 12
![IC THERMOMETER/STAT DIG 8-SOIC](/photos/1/39/13902/8-soic_21-0042b_sml.jpg)
DS1621S+T&R
Manufacturer Part Number
DS1621S+T&R
Description
IC THERMOMETER/STAT DIG 8-SOIC
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1621S.pdf
(16 pages)
Specifications of DS1621S+T&R
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
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
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
Lead free / RoHS 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.