PCA9543 Philips Semiconductors, PCA9543 Datasheet - Page 2

• Manufacturer Part Number: PCA9543
• Description: 2-channel I2C switch with interrupt logic and reset
• Manufacturer: Philips Semiconductors

Philips Semiconductors
FEATURES
DESCRIPTION
The PCA9543 is a bi-directional translating switch, controlled by the
I
pairs, or channels. Any individual SCx/SDx channels or combination
of channels can be selected, determined by the contents of the
programmable control register. Two interrupt inputs, INT0 to INT3,
one for each of the downstream pairs, are provided. One interrupt
output INT, which acts as an AND of the two interrupt inputs, is
provided.
An active-LOW reset input allows the PCA9543 to recover from a
situation where one of the downstream I
state. Pulling the RESET pin LOW resets the I
causes all the channels to be deselected, as does the internal power
on reset function.
The pass gates of the switches are constructed such that the V
pin can be used to limit the maximum high voltage which will be
passed by the PCA9543. 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.
ORDERING INFORMATION
Standard packing quantities and other packaging data are available at www.standardproducts.philips.com/packaging.
2
2004 Oct 01
C-bus. The SCL/SDA upstream pair fans out to two downstream
1-of-2 bi-directional translating switches
I
2 Active LOW Interrupt Inputs
Active LOW Interrupt Output
Active LOW Reset Input
2 address pins allowing up to 4 devices on the I
Channel selection via I
Power up with all switch 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 kHz to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
150 V MM per JESD22-A115 and 1000 V 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 standards
14-Pin Plastic TSSOP
14-Pin Plastic SO
ON
PACKAGES
switches
2
2
C switch with interrupt logic and reset
C-bus, in any combination
2
C-buses is stuck in a LOW
TEMPERATURE RANGE
2
C state machine and
–40 C to +85 C
–40 C to +85 C
2
C-bus
DD
2
PIN CONFIGURATION
PIN DESCRIPTION
NUMBER
PIN
10
12
13
14
11
1
2
3
4
5
6
7
8
9
ORDER CODE
PCA9543PW
PCA9543D
SYMBOL
RESET
RESET
INT0
INT1
SD0
SC0
SD1
SC1
SCL
SDA
V
V
INT
A0
A1
Figure 1. Pin configuration
DD
INT0
SS
SD0
SC0
V
A1
SS
A0
1
2
3
4
5
6
7
Address input 0
Address input 1
Active LOW reset input
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
SW00803
14
13
12
10
11
9
8
DRAWING NUMBER
FUNCTION
V
SDA
SCL
INT
SC1
SD1
INT1
DD
SOT108-1
SOT402-1
Product data sheet
PCA9543