MAX6663AEE+ Maxim Integrated Products, MAX6663AEE+ Datasheet - Page 7

• Manufacturer Part Number: MAX6663AEE+
• Description: IC TEMP MON FAN CNTRL 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6663AEE+

• Function: Fan Control, Temp Monitor
• Topology: ADC, Multiplexer, Register Bank, Tachometer
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Full Temp Accuracy: +/- 1 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 11 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. SMBus Protocols
Figure 2. SMBus Write Timing Diagram
Write Byte Format
Read Byte Format
Send Byte Format
S = Start condition
P = Stop condition
SMBCLK
SMBDATA
S
S
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
E = SLAVE PULLS SMBDATA LINE LOW
S
ADDRESS
Slave Address: equiva-
lent to chip-select line
ADDRESS
7 bits
t
SU:STA
7 bits
Slave Address: equiva-
lent to chip-select line of
a 3-wire interface
ADDRESS
A
t
7 bits
HD:STA
_______________________________________________________________________________________
WR
Shaded = Slave transmission
/ / / = Not acknowledged
t
LOW
WR
ACK
B
t
HIGH
ACK
WR
Data Byte: writes data to the
register commanded by the
last read byte or write byte
transmission
COMMAND
8 bits
t
Command Byte: selects
which register you are
reading from
SU:DAT
COMMAND
C
8 bits
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO SLAVE
H = LSB OF DATA CLOCKED INTO SLAVE
I = MASTER PULLS DATA LINE LOW
ACK
ACK
D
Command Byte: selects which
register you are writing to
ACK
Temperature Monitors and
COMMAND
P
8 bits
E
F
S
Receive Byte Format
t
HD:DAT
S
Slave Address: repeated
due to change in data-
flow direction
ADDRESS
PWM Fan Controllers
7 bits
G
ADDRESS
ACK
7 bits
Data Byte: data goes into the register
set by the co mma nd byte ( to se t
thresholds, configuration masks, and
sampling rate)
RD
H
DATA
8 bits
RD
J = ACKNOWLEDGE CLOCKED INTO SLAVE
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION, DATA EXECUTED BY SLAVE
M = NEW START CONDITION
ACK
I
ACK
J
Data Byte: reads from
the register set by the
command byte
Data Byte: reads data from
the register commanded
by the last read byte or
write byte transmission;
also used for SMBus alert
response return address
K
DATA
8 bits
DATA
8 bits
ACK
t
SU:STO
/ / /
/ / /
L
t
BUF
P
M
P
P
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