DS28EA00U+ Maxim Integrated Products, DS28EA00U+ Datasheet - Page 20

• 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

1-Wire Digital Thermometer with
Sequence Detect and PIO
Figure 11a. ROM Functions Flowchart
20
______________________________________________________________________________________
FUNCTION COMMAND
BUS MASTER Tx ROM
SERIAL NUMBER
FAMILY CODE
DS28EA00 Tx
DS28EA00 Tx
DS28EA00 Tx
COMMAND?
READ ROM
CRC BYTE
(6 BYTES)
(1 BYTE)
33h
Y
FROM CONTROL FUNCTIONS
FLOWCHART (FIGURE 9)
N
MASTER Tx BIT 63
MASTER Tx BIT 0
MASTER Tx BIT 1
BIT 63 MATCH?
BIT 0 MATCH?
BIT 1 MATCH?
MATCH ROM
COMMAND?
55h
Y
Y
Y
Y
TO CONTROL FUNCTIONS
FLOWCHART (FIGURE 9)
PRESENCE PULSE
BUS MASTER Tx
RESET PULSE?
RESET PULSE
DS28EA00 Tx
N
N
N
Y
N
OD
N
N
N
DS28EA00 Tx BIT 63
DS28EA00 Tx BIT 63
DS28EA00 Tx BIT 0
DS28EA00 Tx BIT 0
DS28EA00 Tx BIT 1
DS28EA00 Tx BIT 1
MASTER Tx BIT 63
MASTER Tx BIT 0
MASTER Tx BIT 1
BIT 63 MATCH?
BIT 0 MATCH?
BIT 1 MATCH?
SEARCH ROM
COMMAND?
N
F0h
Y
Y
Y
Y
OD = 0
N
N
N
N
N
CONDITIONAL SEARCH
DS28EA00 Tx BIT 63
DS28EA00 Tx BIT 63
DS28EA00 Tx BIT 0
DS28EA00 Tx BIT 0
DS28EA00 Tx BIT 1
DS28EA00 Tx BIT 1
MASTER Tx BIT 63
MASTER Tx BIT 0
MASTER Tx BIT 1
BIT 63 MATCH?
TEMPERATURE
BIT 0 MATCH?
BIT 1 MATCH?
COMMAND?
ALARM?
ECh
Y
Y
Y
Y
Y
N
FROM FIGURE 11b
FROM FIGURE 11b
TO FIGURE 11b
TO FIGURE 11b