PCA9542 데이터 시트보기 (PDF) - Philips Electronics
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PCA9542 Datasheet PDF : 10 Pages
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Philips Semiconductors
2-channel I2C multiplexer and interrupt controller
Product specification
PCA9542
FEATURES
• 1-of-2 bi-directional translating multiplexer
• Channel selection via I2C bus
• Operating supply voltage 2.5 to 3.6 V
• Operating temperature range 0°C to 70°C
• Power-up with all multiplexer channels deselected
• 3 address pins, allowing up to 8 devices on the I2C bus
• Low on resistance
DESCRIPTION
The PCA9542 is a 1-of-2 bi-directional translating multiplexer,
controlled via the I2C bus. The SCL/SDA upstream pair fans out to
two SCx/SDx downstream pairs, or channels. Only one SCx/SDx
channel is selected at a time, determined by the contents of the
programmable control register. Two interrupt inputs, one for each of
the SCx/SDx downstream pair, are provided. One interrupt output,
which acts as an AND of the two interrupt inputs, is provided. All I/O
pins are 5 V tolerant.
The pass gates of the multiplexer are constructed such that the VDD
pin can be used to limit the maximum high voltage which will be
passed by the PCA9542. This allows the use of different bus
voltages on each SCx/SDx pair, so that 3.3 V parts can
communicate with 5 V parts without any additional protection.
External pull-up resistors can pull the bus up to the desired voltage
level for this channel.
ORDERING INFORMATION
PACKAGES
14-Pin Plastic TSSOP
TEMPERATURE RANGE
0°C to +70°C
PIN CONFIGURATION
A0 1
A1 2
A2 3
INT0 4
SD0 5
SC0 6
VSS 7
14 VDD
13 SDA
12 SCL
11 INT
10 SC1
9 SD1
8 INT1
SW00475
PIN DESCRIPTION
PIN
NUMBER
SYMBOL
1
A0
2
A1
3
A2
4
INT0
5
SD0
6
SC0
7
VSS
8
INT1
9
SD1
10
SC1
11
INT
12
SCL
13
SDA
14
VDD
FUNCTION
Address input 0
Address input 1
Address input 2
Interrupt input 0
Serial data 0
Serial clock 0
Supply ground
Interrupt input 1
Serial data 1
Serial clock 1
Interrupt output
Serial clock line
Serial data line
Supply voltage
ORDER CODE
PCA9542PW DH
DRAWING NUMBER
SOT402-1
1999 Oct 07
2
853–2177 22486
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