sx8744emstrt Semtech Corporation, sx8744emstrt Datasheet - Page 14

• Manufacturer Part Number: sx8744emstrt
• Description: Precision Diode Digital Temperature For Up To 3 External Sensors
• Manufacturer: Semtech Corporation

A different ideality factor causes a change in the slope of the linear
equation V
Gain and offset can be adjusted with the registers RegExtGain and
RegExtOffset to compensate for small variations in n. Large power
transistors must not be used.
5. Power-Up Sequence and Standby Mode
At power-up, the device is in one-shot mode waiting for an SMBUS command to start conversion. The measurement
interval and the alarm thresholds will default to a set value at power-up but may be reconfigured to different values with
SMBUS command.
Between temperature measurements, to decrease power consumption, the chip will shut down into its low-power standby
state with most functions disabled.
6. Serial Interface
6.1. Register Write - Combined Format
6.2. Register Write - Direct Format
ACS Revision 2.91/February 2010
©2010 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
Write to single register (combined format)
SA
Write to single register (direct format)
6
SA6
SA
5
Slave address 0x4C
BE
SA5
SA
4
Slave address 0x4C
=f(T).
SA
3
SA4
SA
2
SA3
SA
1
SA2
SA
0
R/
W
SA1
SA0
RA
Part Number
7
MMBT3906
R/W
RA
6
RA
5
Register Address
RA
4
Table 5 Recommended device
RA7
RA
3
RA6
RA
2
RA
1
RA5
Manufacturer
RA
Register Address
0
RA4
Fairchild
Page 14
RA3
SA
6
RA2
SX8733/SX8743/SX8744
SA
5
Precision Diode Digital Temperature
Slave address 0x4C
RA1
SA
4
RA0
SA
3
SA
2
For Up To 3 External Sensors
Package
SOT23-3
T
SA
1
nfact
WD7 WD6 WD5 WD4 WD3 WD2 WD1 WD0
SA
0
R/
W
=


-------------- - 1
n
WD
n
actual
7
Write Data
nom
WD
6
WD
5
–
Write Data
WD
4


www.semtech.com
WD
DATASHEET
3
T
WD
2
D
WD
+
1
273.15
WD
0