PCA9542AD,112 NXP Semiconductors, PCA9542AD,112 Datasheet - Page 9

• Manufacturer Part Number: PCA9542AD,112
• Description: IC I2C MUX 2CH 14SOIC
• Manufacturer: NXP Semiconductors

Specifications of PCA9542AD,112

• Applications: 2-Channel I²C Multiplexer
• Interface: I²C
• Voltage - Supply: 2.3 V ~ 5.5 V
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935275801112; PCA9542AD; PCA9542AD

NXP Semiconductors
8. Application design-in information
PCA9542A_4
Product data sheet
7.5 Bus transactions
Fig 11. Write control register
Fig 12. Read control register
Fig 13. Typical application
SDA
SDA
(1) If the device generating the interrupt has an open-drain output structure or can be 3-stated,
I
2
START condition
START condition
C-bus/SMBus master
a pull-up resistor is required.
If the device generating the interrupt has a totem pole output structure and cannot be 3-stated,
a pull-up resistor is not required.
The interrupt inputs should not be left floating.
V
S
S
DD
= 2.7 V to 5.5 V
1
1
SDA
SCL
1
1
slave address
slave address
1
1
Rev. 04 — 15 June 2009
0
0
A2
A2
A1
A1
A0
A0
SDA
SCL
INT
A2
A1
A0
V
2-channel I
SS
R/W
R/W
PCA9542A
0
1
V
DD
A
A
acknowledge
from slave
acknowledge
from slave
= 3.3 V
002aae306
X
X
INT0
INT1
2
SD0
SC0
SD1
SC1
C-bus multiplexer and interrupt logic
X
X
INT
X
1
control register
control register
INT
X
0
X
X
(1)
(1)
PCA9542A
B2
B2
no acknowledge
B1
acknowledge
B1
© NXP B.V. 2009. All rights reserved.
V = 2.7 V to 5.5 V
V = 2.7 V to 5.5 V
from master
channel 0
channel 1
from slave
STOP condition
STOP condition
B0
B0
last byte
002aae299
002aae305
NA
A
P
P
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