PCA9546A All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 6 — 30 April 2014 10 of 30
NXP Semiconductors
PCA9546A
4-channel I
2
C-bus switch with reset
7.5 Bus transactions
Data is transmitted to the PCA9546A control register using the Write mode as shown in
Figure 12
.
Data is read from PCA9546A using the Read mode as shown in Figure 13.
Fig 12. Write control register
Fig 13. Read control register
002aab196
XXXXB3B2B1B01 1 0 A2 A1 A0 0 AS 1 A P
slave address
START condition R/W acknowledge
from slave
acknowledge
from slave
control register
SDA
STOP condition
002aab197
XXXXB3B2B1B01 1 0 A2 A1 A0 1 AS 1 NA P
slave address
START condition R/W acknowledge
from slave
no acknowledge
from master
control register
SDA
STOP condition
last byte
PCA9546A All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 6 — 30 April 2014 11 of 30
NXP Semiconductors
PCA9546A
4-channel I
2
C-bus switch with reset
8. Application design-in information
Fig 14. Typical application
PCA9546A
SD0
SC0
A1
A0
V
SS
SDA
SCL
RESET
V
DD
= 3.3 V
V
DD
= 2.7 V to 5.5 V
I
2
C/SMBus master
002aab198
SDA
SCL
channel 0
V = 2.7 V to 5.5 V
SD1
SC1
channel 1
V = 2.7 V to 5.5 V
SD2
SC2
channel 2
V = 2.7 V to 5.5 V
SD3
SC3
channel 3
V = 2.7 V to 5.5 V
A2
PCA9546A All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 6 — 30 April 2014 12 of 30
NXP Semiconductors
PCA9546A
4-channel I
2
C-bus switch with reset
9. Limiting values
[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.
10. Thermal characteristics
Table 5. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Voltages are referenced to V
SS
(ground = 0 V)
[1]
.
Symbol Parameter Conditions Min Max Unit
V
DD
supply voltage 0.5 +7.0 V
V
I
input voltage 0.5 +7.0 V
I
I
input current - 20 mA
I
O
output current - 25 mA
I
DD
supply current - 100 mA
I
SS
ground supply current - 100 mA
P
tot
total power dissipation - 400 mW
T
j(max)
maximum junction temperature
[1]
-125C
T
stg
storage temperature 60 +150 C
T
amb
ambient temperature operating 40 +85 C
Table 6. Thermal characteristics
Symbol Parameter Conditions Typ Unit
R
th(j-a)
thermal resistance from junction
to ambient
HVQFN16 package 40 C/W
SO16 package 115 C/W
TSSOP16 package 160 C/W

PCA9546AD,112

Mfr. #:
Manufacturer:
NXP Semiconductors
Description:
Multiplexer Switch ICs 4CH I2C SWTCH W/REST
Lifecycle:
New from this manufacturer.
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