DS1721S Maxim Integrated Products, DS1721S Datasheet - Page 12
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DS1721S
Manufacturer Part Number
DS1721S
Description
IC THERMOMETER/STAT DIG HP 8SOIC
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1721STR.pdf
(17 pages)
Specifications of DS1721S
Function
Thermometer, Thermostat
Topology
ADC, Comparator, Register Bank
Sensor Type
Internal
Sensing Temperature
-55°C ~ 125°C
Output Type
I²C™/SMBus™
Output Alarm
Yes
Output Fan
Yes
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
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DS1721S
Manufacturer:
DALLAS
Quantity:
5 510
Company:
Part Number:
DS1721S
Manufacturer:
INF
Quantity:
5 510
Part Number:
DS1721S
Manufacturer:
DALLAS
Quantity:
20 000
Company:
Part Number:
DS1721S+
Manufacturer:
Maxim
Quantity:
4 050
Part Number:
DS1721S+
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
DS1721S+T
Manufacturer:
DS
Quantity:
20 000
Part Number:
DS1721S+T&R
Manufacturer:
MAXIM/美信
Quantity:
20 000
SAMPLE COMMAND SEQUENCE Table 5
Example: After power-up, initiates a temperature conversion, bus master reads temperature
BUS MASTER
MODE
RX
RX
RX
RX
RX
RX
RX
TX
TX
TX
TX
TX
TX
TX
TX
TX
DS1721
MODE
RX
RX
RX
RX
RX
RX
RX
RX
RX
TX
TX
TX
TX
TX
TX
TX
DATA (MSB
<1 data byte>
<1 data byte>
<address, 0>
<address, 0>
<address, 1>
FIRST)
START
START
START
ACK
ACK
ACK
ACK
ACK
ACK
AAh
51h
12 of 17
COMMENTS
Bus Master initiates a START condition
Bus Master sends DS1721 address; R/
DS1721 generates acknowledge bit
Bus Master sends start convert T protocol
DS1721 generates acknowledge bit
Bus Master initiates a repeated START condition
Bus Master sends DS1721 address; R/
DS1721 generates acknowledge bit
Bus Master sends read temperature protocol
DS1721 generates acknowledge bit
Bus Master initiates a repeated START condition
Bus Master sends DS1721 address; R/
DS1721 generates acknowledge bit
DS1721 transmits MSB of temperature
Bus Master generates acknowledge bit
DS1721 transmits LSB of temperature
W
W
W
= 0
= 0
=1