DS28EA00U+ Maxim Integrated Products, DS28EA00U+ Datasheet - Page 13

• Manufacturer Part Number: DS28EA00U+
• Description: IC THERMOMETER 1-WIRE 8-USOP
• Manufacturer: Maxim Integrated Products

Specifications of DS28EA00U+

• Function: Thermometer, Thermostat
• Topology: Register Bank, Scratchpad
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 85°C
• Output Type: Digital
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 9a. Control Function Flowchart
N
BUS MASTER Tx CONTROL
DS28EA00 INCREMENTS
BYTE TO SCRATCHPAD
FUNCTION COMMAND
WRITE SCRATCHPAD?
MASTER Tx RESET?
MASTER Tx RESET?
BYTE ADDRESS = 2
MASTER Tx DATA
DS28EA00 SETS
BYTE ADDRESS
ADDRESS = 4?
BYTE
4Eh
Y
N
N
Y
______________________________________________________________________________________
FLOWCHART (FIGURE 11)
TO ROM FUNCTIONS
N
Y
Y
FLOWCHART (FIGURE 11)
FROM ROM FUNCTIONS
1-Wire Digital Thermometer with
DS28EA00 INCREMENTS
READ SCRATCHPAD?
FROM SCRATCHPAD
BYTE ADDRESS = 0
MASTER Tx RESET?
MASTER Tx RESET?
MASTER Rx BYTE
MASTER Rx 8-BIT
DS28EA00 SETS
MASTER Rx "1"s
BYTE ADDRESS
ADDRESS = 7?
CRC OF DATA
BYTE
BEh
Y
N
N
N
Sequence Detect and PIO
N
Y
Y
Y
DS28EA00 STARTS
COPY TO EEPROM
MASTER Rx "0"s
COMPLETED?
COPY
N
Y
COPY SCRATCHPAD?
MASTER Tx RESET?
MASTER Rx "1"s
V
DD
Y
POWERED?
48h
Y
N
SCRATCHPAD DATA TO EEPROM
MASTER ACTIVATES STRONG
MASTER DEACTIVATES
PULLUP FOR t
DS28EA00 COPIES
STRONG PULLUP
MASTER DECISION.
THE MASTER NEEDS TO
KNOW WHETHER V
POWER IS AVAILABLE.
N
N
Y
FROM FIGURE 9b
TO FIGURE 9b
PROG
DD
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