pca9542a NXP Semiconductors, pca9542a Datasheet - Page 2

• Manufacturer Part Number: pca9542a
• Description: Pca9542a 2-channel I2c Multiplexer And Interrupt Logic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
DESCRIPTION
The PCA9542A is a 1-of-2 bi-directional translating multiplexer,
controlled via the I
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, INT0 and INT1,
one for each of the SCx/SDx downstream pairs, are provided. One
interrupt output, INT, which acts as an AND of the two interrupt
inputs, is provided.
A power-on reset function puts the registers in their default state and
initializes the I
ORDERING INFORMATION
Standard packing quantities and other packaging data is available at www.standardproducts.philips.com/packaging.
2004 Sep 29
1-of-2 bi-directional translating multiplexer
I
2 Active Low Interrupt Inputs
Active Low Interrupt Output
3 address pins allowing up to 8 devices on the I
Channel selection via I
Power up with all multiplexer channels deselected
Low Rds
Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and
5 V buses
No glitch on power-up
Supports hot insertion
Low stand-by current
Operating power supply voltage range of 2.3 V to 5.5 V
5 V tolerant Inputs
0 to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000V per JESD22-C101
Latchup testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
Packages offered: SO14, TSSOP14
2-channel I
2
C interface logic; compatible with SMBus
14-Pin Plastic TSSOP
14-Pin Plastic SO
PACKAGES
ON
2
switches
C state machine with no channels selected.
2
C-bus. The SCL/SDA upstream pair fans out to
2
2
C multiplexer and interrupt logic
C-bus
TEMPERATURE RANGE
–40 C to +85 C
–40 C to +85 C
2
C-bus
ORDER CODE
PCA9542APW
PCA9542AD
2
The pass gates of the multiplexer are constructed such that the V
pin can be used to limit the maximum high voltage which will be
passed by the PCA9542A. This allows the use of different bus
voltages on each SCx/SDx pair, so that 1.8 V, 2.5 V, or 3.3 V parts
can communicate with 5 V parts without any additional protection.
External pull-up resistors pull the bus up to the desired voltage level
for each channel. All I/O pins are 5 V tolerant.
PIN CONFIGURATION
PIN DESCRIPTION
NUMBER
PIN
10
12
13
14
11
1
2
3
4
5
6
7
8
9
SYMBOL
TOPSIDE MARK
INT0
INT1
SD0
SC0
SD1
SC1
SCL
SDA
V
V
INT
PCA9542AD
A0
A1
A2
Figure 1. Pin configuration
DD
INT0
SS
PA9542A
SD0
SC0
V
A1
A2
SS
A0
1
2
3
4
5
6
7
Address input 0
Address input 1
Address input 2
Active LOW interrupt input 0
Serial data 0
Serial clock 0
Supply ground
Active LOW interrupt input 1
Serial data 1
Serial clock 1
Active LOW interrupt output
Serial clock line
Serial data line
Supply voltage
SW00475
14
13
12
10
11
9
8
FUNCTION
DRAWING NUMBER
V
SDA
SCL
INT
SC1
SD1
INT1
PCA9542A
DD
SOT108-1
SOT402-1
Product data sheet
DD