MAX6651EEE Maxim Integrated Products, MAX6651EEE Datasheet - Page 7

• Manufacturer Part Number: MAX6651EEE
• Description: IC REG/MONITOR FAN-SPEED 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6651EEE

• Applications: Fan Controller, Brushless (BLDC)
• Number Of Outputs: 1
• Voltage - Load: 0.3 V ~ 5.2 V
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Operating Supply Voltage: 3 V to 5.5 V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q1113225

Figure 2a. SMBus Protocol: Write Byte Format
Figure 2b. SMBus Protocol: Read Byte Format
Figure 2c. SMBus Protocol: Receive Byte Format
S = Start condition
P = Stop condition
S
S
S
S
Slave Address
Slave Address
Slave Address.
Repeated due to
change in data-flow
direction
Slave Address
ADDRESS
ADDRESS
ADDRESS
ADDRESS
7 bits
7 bits
7 bits
7 bits
_______________________________________________________________________________________
Shaded = Slave transmission
ACK = Acknowledged = 0
A = Not acknowledged = 1
with SMBus/I
WR
WR
RD
RD
0
0
1
1
Fan-Speed Regulators and Monitors
ACK
ACK
ACK
ACK
Data byte: Reads from
the register set by the
command byte.
Data byte: Reads data
from the register com-
manded by the last
read-byte or write-byte
transmission; also
used for SMBus alert
response return address.
Command byte: Selects
which register you are
writing to.
Command byte: Selects
which register you are
reading from.
COMMAND
COMMAND
WR = Write = 0
RD = Read =1
DATA
DATA
8 bits
8 bits
8 bits
8 bits
2
C-Compatible Interface
ACK
ACK
A
A
Data byte: Data goes into
the register set by the
command byte (to set
thresholds, configuration
masks, and sampling rate).
P
P
DATA
8 bits
ACK
P
7