DS1629S/T&R Maxim Integrated Products, DS1629S/T&R Datasheet - Page 19

• Manufacturer Part Number: DS1629S/T&R
• Description: IC THERM/RTC/CALENDAR DIG 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of DS1629S/T&R

• Function: Thermometer, Thermostat
• Topology: ADC, Comparator, Oscillator, 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: 9 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Sample Command Sequence Table 10
Example: Assuming the DS1629 is configured such that the clock is running and the thermometer is
converting, read the current time and temperature. Also read the status of the alarm flags.
BUS MASTER
MODE
RX
RX
RX
RX
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
TX
TX
TX
TX
TX
•
DS1629
MODE
RX
RX
TX
RX
TX
RX
RX
TX
TX
RX
TX
RX
RX
RX
TX
RX
TX
RX
TX
RX
RX
TX
TX
RX
TX
RX
TX
RX
RX
RX
TX
RX
TX
RX
TX
TX
RX
TX
RX
RX
•
DATA (MSB
<data byte>
<data byte>
<data byte>
<data byte>
<data byte>
<data byte>
<data byte>
FIRST)
START
START
START
START
START
NACK
NACK
NACK
STOP
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
AAh
ACh
C0h
9Eh
9Eh
9Eh
9Fh
01h
9Fh
9Fh
•
19 of 22
Bus Master initiates a START condition
Bus Master sends DS1629 address; R/
DS1629 generates acknowledge bit
Bus Master sends read temperature protocol
DS1629 generates acknowledge bit
Bus Master initiates a Repeated START condition
Bus Master sends DS1629 address; R/
DS1629 generates acknowledge bit
DS1629 generates MSB of temperature
Bus Master generates acknowledge bit
DS1629 generates LSB of temperature
Master generates no-acknowledge bit
Bus Master initiates a repeated START condition
Bus Master sends DS1629 address; R/
DS1629 generates acknowledge bit
Bus Master sends access clock protocol
DS1629 generates acknowledge bit
Bus Master set clock register address to “minutes”
DS1629 generates acknowledge bit
Bus Master initiates a Repeated START condition
Bus Master sends DS1629 address; R/
DS1629 generates acknowledge bit
DS1629 generates minutes
DS1629 generates hours and clock mode
DS1629 generates year
Master generates no-acknowledge bit
Bus Master initiates a repeated START condition
Bus Master sends DS1629 address; R/
DS1629 generates acknowledge bit
Bus Master sends access configuration protocol
DS1629 generates acknowledge bit
Bus Master sends DS1629 address; R/
DS1629 generates acknowledge bit
DS1629 generates MSB of configuration register
Master generates acknowledge bit
DS1629 generates LSB of configuration register
(flags)
Master generates no-acknowledge bit
Bus Master initiates STOP condition
Bus Mastergenerates acknowledge bit
Bus Master generates acknowledge bit
COMMENTS
•
W
W
W
W
W
W
= 0
= 1
= 0
= 1
= 0
= 1