DS1620 Maxim Integrated Products, DS1620 Datasheet - Page 9

• Manufacturer Part Number: DS1620
• Description: IC THERMOMETER/STAT DIG 8-DIP
• Manufacturer: Maxim Integrated Products

Specifications of DS1620

• Function: Thermometer, Thermostat
• Topology: Comparator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: Digital
• 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 (3-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

FUNCTION EXAMPLE
Example: CPU sets up DS1620 for continuous conversion and thermostatic function.
READ DATA TRANSFER Figure 4
CPU MODE
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
RX
TX
TX
RX
TX
TX
TX
DS1620 MODE
(3-WIRE)
RX
RX
RX
RX
RX
RX
RX
RX
RX
RX
TX
RX
RX
TX
RX
RX
RX
DATA (LSB FIRST)
Toggle
Toggle
Toggle
Toggle
Toggle
Drop
0050h
0014h
0050h
0014h
0Ch
A1h
A2h
EEh
00h
01h
02h
RST
RST
RST
RST
RST
RST
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CPU issues Write Config command
CPU sets DS1620 up for continuous
conversion
CPU issues Reset to DS1620
CPU issues Write TH command
CPU sends data for TH limit of +40˚C
CPU issues Reset to DS1620
CPU issues Write TL command
CPU sends data for TL limit of +10˚C
CPU issues Reset to DS1620
CPU issues Read TH command
DS1620 sends back stored value of TH for
CPU to verify
CPU issues Reset to DS1620
CPU issues Read TL command
DS1620 sends back stored value of TL for
CPU to verify
CPU issues Reset to DS1620
CPU issues Start Convert T command
CPU issues Reset to DS1620
COMMENTS