MAX6690MEE+T Maxim Integrated Products, MAX6690MEE+T Datasheet - Page 10

• Manufacturer Part Number: MAX6690MEE+T
• Description: IC TEMP SENSOR SMBUS 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6690MEE+T

• Function: Thermometer, Thermostat
• Topology: ADC, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -55°C ~ 125°C, External Sensor
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Full Temp Accuracy: +/- 5 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 7 bit + Sign
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MAX6690MEE+T; MAX6690MEE+TTR

Figure 3. SMBus Protocols
Figure 5. SMBus Read Timing Diagram
Figure 4. SMBus Write Timing Diagram
2°C Accurate Remote/Local Temperature
Sensor with SMBus Serial Interface
Write Byte Format
Read Byte Format
Send Byte Format
S = Start condition
P = Stop condition
10
SMBCLK
SMBDATA
S
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
ADDRESS
Slave Address: equiva-
lent to chip-select line
t
ADDRESS
SMBCLK
SMBDATA
SU:STA
7 bits
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
7 bits
Slave Address: equiva-
lent to chip-select line of
a 3-wire interface
A
t
HD:STA
ADDRESS
t
7 bits
SU:STA
t
LOW
WR
A
Shaded = Slave transmission
/// = Not acknowledged
t
HD:STA
B
WR
t
HIGH
ACK
t
LOW
B
ACK
WR
t
t
HIGH
SU:DAT
Command Byte: sends com-
mand with no data, usually
used for one-shot command
COMMAND
C
8 bits
Command Byte: selects
which register you are
reading from
COMMAND
E = SLAVE PULLS SMBDATA LINE LOW
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO MASTER
H = LSB OF DATA CLOCKED INTO MASTER
t
SU:DAT
8 bits
ACK
C
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO SLAVE
H = LSB OF DATA CLOCKED INTO SLAVE
I = SLAVE PULLS SMBDATA LINE LOW
D
ACK
Command Byte: selects which
register you are writing to
D
E
ACK
F
COMMAND
P
8 bits
E
F
S
G
Receive Byte Format
t
HD:DAT
S
Slave Address: repeated
due to change in data-
flow direction
ADDRESS
G
7 bits
ADDRESS
ACK
I = MASTER PULLS DATA LINE LOW
J = ACKNOWLEDGE CLOCKED INTO SLAVE
K = ACKNOWLEDGE CLEAR PULSE
7 bits
H
H
Data Byte: data goes into the register
set by the command byte (to set
thresholds, configuration masks, and
sampling rate)
RD
J = ACKNOWLEDGE CLOCKED INTO MASTER
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION, DATA EXECUTED BY SLAVE
M = NEW START CONDITION
I
DATA
RD
8 bits
I
J
ACK
J K
ACK
K
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
DATA
8 bits
DATA
8 bits
J = STOP CONDITION, DATA
K = NEW START CONDITION
ACK
t
SU:STO
EXECUTED BY SLAVE
t
L
SU:STO
t
BUF
M
L
///
///
t
BUF
M
P
1
P
P