MAX6634MSA+T Maxim Integrated Products, MAX6634MSA+T Datasheet - Page 6
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MAX6634MSA+T
Manufacturer Part Number
MAX6634MSA+T
Description
IC TEMP SENSOR SMBUS 8-SOIC
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6633MSA.pdf
(16 pages)
Specifications of MAX6634MSA+T
Function
Temp Monitoring System (Sensor)
Topology
ADC, Register Bank
Sensor Type
Internal
Sensing Temperature
-55°C ~ 150°C
Output Type
I²C™/SMBus™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-55°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Full Temp Accuracy
+/- 2.5 C
Digital Output - Bus Interface
Serial (3-Wire, I2C)
Digital Output - Number Of Bits
12 bit + Sign
Maximum Operating Temperature
+ 150 C
Minimum Operating Temperature
- 55 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
12-Bit Plus Sign Temperature Sensors with
SMBus/I
Figure 1. SMBus Protocols
Figure 2. SMBus Write Timing Diagram
6
S
S
S = Start condition
P = Stop condition
Write Word Format
Read Word Format
Write Byte Format
Read Byte Format
_______________________________________________________________________________________
S
S
SMBCLK
SMBDATA
Slave Address: equivalent
to chip-select line
Slave Address:
equivalent to chip-
select line
ADDRESS
ADDRESS
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
7 bits
Slave Address:
equivalent
to chip-select line of a 3-
wire interface
Slave Address:
equivalent to chip-select
line of a
3-wire interface
ADDRESS
ADDRESS
t
SU:STA
7 bits
7 bits
A
WR
WR
t
HD:STA
2
C-Compatible Serial Interface
t
LOW
Shaded = Slave transmission
/// = Not acknowledged
ACK
ACK
WR
WR
B
t
HIGH
Command Byte:
selects register you
are reading from
Command Byte:
selects register you
are reading from
COMMAND
COMMAND
8 bits
8 bits
ACK
ACK
t
SU:DAT
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
Command Byte:
selects register you
are writing to
COMMAND
ACK
ACK
Command Byte: selects
register you are writing to
8 bits
COMMAND
D
8 bits
S
S
ACK
E
Slave Address: repeated due to
change in data-flow direction
Slave Address: repeated
due to change in data-flow
direction
ADDRESS
ADDRESS
F
7 bits
7 bits
Data Bytes: data goes into the
register set by the command
byte
ACK
t
HD:DAT
DATA
(MSB)
8 bits
G
RD
RD
Data Byte: data goes into the register set by the
command byte
ACK
ACK
DATA
8 bits
H
ACK
J = ACKNOWLEDGE CLOCKED INTO MASTER
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION, DATA EXECUTED BY SLAVE
M = NEW START CONDITION
DATA
8 bits
(LSB)
DATA
(MSB)
Data Bytes: reads from the
register set by the command
byte
8 bits
I
Data Byte: reads from the
register set by the command
byte
ACK
J K
DATA
8 bits
ACK
ACK
DATA
8 bits
(LSB)
///
t
SU:STO
L
P
///
t
BUF
P
M
P
P