DS620U+ Maxim Integrated Products, DS620U+ Datasheet - Page 13

• Manufacturer Part Number: DS620U+
• Description: IC THERMOMETER/STAT DIG 8MSOP
• Manufacturer: Maxim Integrated Products

Specifications of DS620U+

• Function: Thermometer, Thermostat
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 1.7 V ~ 3.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP Exposed Pad, 8-HMSOP, 8-eMSOP
• Temperature Threshold: Programmable
• Full Temp Accuracy: +/- 0.5 C
• Digital Output - Bus Interface: 2-Wire, SMBus
• Digital Output - Number Of Bits: 10 bit to 13 bit
• Supply Voltage (max): 3.5 V
• Supply Voltage (min): 1.7 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Supply Current: 800 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

COPYING TO EEPROM COMMAND SEQUENCE
Data is written to DS620 and then copied from SRAM to EEPROM
MASTER
MODE
BUS
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
DS620
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
<address, 0>
<address, 0>
<address, 0>
<address, 0>
xxxxxxx0b
FIRST)
START
START
START
START
<data>
<data>
<data>
<data>
DATA
(MSB
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACK
ACh
ACh
A4h
51h
Bus master initiates a START condition.
Bus master sends DS620 address, R/W = 0.
DS620 generates acknowledge bit.
Bus master sends the address location of the first byte
of data to be written. (In this case the first byte of user
EEPROM).
DS620 generates acknowledge.
Bus master sends one byte of data to the SRAM
location for EEPROM address A4h.
DS620 generates acknowledge.
Bus master sends one byte of data to the SRAM
location for EEPROM for address A5h.
DS620 generates acknowledge.
Bus master sends one byte of data to the SRAM
location for EEPROM for address A6h.
DS620 generates acknowledge.
Bus master sends one byte of data to the SRAM
location for EEPROM for address A7h.
DS620 generates acknowledge.
Bus master generates a repeated start condition.
Bus master sends DS620 address, R/W = 0.
DS620 generates acknowledge.
Bus master sends the address location of the MSb of
the configuration register (contains the 1SHOT bit).
This writes to the SRAM location corresponding the
EEPROM location. NOTE: Sequence numbers 17
through 23 need to be done only if DS620 is in 1SHOT
mode: 1SHOT = 1.
DS620 generates acknowledge.
Bus master writes to the configuration register putting
the DS620 in continuous conversion mode: 1SHOT =
0.
DS620 generates acknowledge.
Bus master generates a repeated start condition.
Bus master sends DS620 address, R/W = 0.
DS620 generates acknowledge
Master sends START CONVERT command to DS620
to start temperature conversions.
DS620 generates acknowledge bit and begins
conversions.
Bus master generates a repeated start condition.
Bus master sends DS620 address, R/W = 0.
DS620 generates acknowledge.
Bus master sends the address location of the MSb of
the configuration register (contains the 1SHOT bit).
This writes to the SRAM location corresponding the
EEPROM location. NOTE: command sequence
numbers 29 through 34 need only be done if a return to
1SHOT mode operation is needed.
13 of 15
COMMENTS
SEQUENCE
NUMBER
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
1
2
3
4
5
6
7
8
9