PCA9549 Просмотр технического описания (PDF) - NXP Semiconductors.
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PCA9549 Datasheet PDF : 25 Pages
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NXP Semiconductors
PCA9549
Octal bus switch with individually I2C-bus controlled enables
7.4 Bus transactions
Data is transmitted to the PCA9549 control register using the Write mode as shown in
Figure 12.
slave address
control register
SDA S 1 1 1 0 A2 A1 A0 0 A B7 B6 B5 B4 B3 B2 B1 B0 A P
START condition
R/W acknowledge
from slave
acknowledge
from slave
STOP condition
002aac430
Fig 12. Write control register
Data is read from the PCA9549 using the Read mode as shown in Figure 13.
slave address
control register
last byte
SDA S 1 1 1 0 A2 A1 A0 1 A B7 B6 B5 B4 B3 B2 B1 B0 A P
START condition
Fig 13. Read control register
R/W acknowledge
from slave
no acknowledge
from master
STOP condition
002aac431
8. Limiting values
Table 5. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).[1]
Symbol Parameter
Conditions
Min
Max
Unit
VDD
VI
II
IO
IDD
ISS
Ptot
Tstg
Tamb
supply voltage
input voltage
input current
output current
supply current
ground supply current
total power dissipation
storage temperature
ambient temperature
operating
−0.5
+7.0
V
−0.5
+7.0
V
−20
+20
mA
−25
+25
mA
−100
+100
mA
−100
+100
mA
-
400
mW
−60
+150
°C
−40
+85
°C
[1] The performance capability of a high-performance integrated circuit in conjunction with its thermal
environment can create junction temperatures which are detrimental to reliability. The maximum junction
temperature of this integrated circuit should not exceed 125 °C.
PCA9549_2
Product data sheet
Rev. 02 — 13 July 2009
© NXP B.V. 2009. All rights reserved.
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