DS18S20+ Maxim Integrated Products, DS18S20+ Datasheet - Page 17

• Manufacturer Part Number: DS18S20+
• Description: Board Mount Temperature Sensors PARASITE POW DIG THERMOMETER 1-WR
• Manufacturer: Maxim Integrated Products

Specifications of DS18S20+

• Temperature Threshold: Programmable
• Full Temp Accuracy: +/- 0.5 C
• Package / Case: TO-92
• Digital Output - Bus Interface: 1-Wire
• Digital Output - Number Of Bits: 9 bit
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Output Type: Digital
• Supply Current: 1.5 mA
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 0.5°C
• Temperature Sensing Range: -55°C To +125°C
• Supply Voltage Range: 3V To 5.5V
• Resolution (bits): 9bit
• Rohs Compliant: Yes
• Dc: 08+
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 15. DS18S20 Function Commands Flowchart
MASTER T
COMMAND
FUNCTION
MASTER
R
DS18S20 BEGINS
X
TEMPERATURE
N
CONVERTING
N
“1s”
CONVERSION
MASTER
DEVICE
R
Y
X
X
POWER SUPPLY
?
“0s”
POWERED
PARASITE
READ
B4h
?
?
Y
N
N
TEMPERATURE
MASTER
R
MASTER
Y
CONVERT
PARASITE
R
X
POWER
X
“0s”
“1s”
44h
?
?
Y
STRONG PULLUP ON DQ
Y
DS18S20 CONVERTS
N
MASTER ENABLES
MASTER DISABLES
STRONG PULLUP
TEMPERATURE
N
RECALL FROM E
MASTER BEGINS DATA
BUSY RECALLING
RECALL E
MASTER
DEVICE
R
SEQUENCE (FIGURE 14) FOR
Y
RETURN TO INITIALIZATION
DATA
B8h
X
?
?
“0s”
NEXT TRANSACTION
Y
2
2
PROM
17 of 23
N
MASTER
R
X
“1s”
PROGRESS
Y
MASTER
COPY IN
R
X
N
MASTER R
N
?
“0s”
MASTER R
FROM SCRATCHPAD
SCRATCHPAD
HAVE 8 BYTES
N
BEEN READ
CRC BYTE
T
MASTER
X
READ
X
RESET
BEh
SCRATCHPAD
X
?
?
?
SCRATCHPAD
N
DATA BYTE
N
Y
Y
PARASITE
POWER
MASTER
COPY
R
48h
X
?
?
“1s”
Y
Y
SCRATCHPAD TO EEPROM
STRONG PULL-UP ON DQ
N
DATA COPIED FROM
Y
MASTER DISABLES
MASTER ENABLES
STRONG PULLUP
N
MASTER T
MASTER T
TO SCRATCHPAD
TO SCRATCHPAD
SCRATCHPAD
WRITE
4Eh
?
X
X
DS18S20
T
T
Y
L
H
BYTE
BYTE