PCA9548 Philips Semiconductors, PCA9548 Datasheet - Page 2

• Manufacturer Part Number: PCA9548
• Description: 8-channel I2C switch with reset
• Manufacturer: Philips Semiconductors

Philips Semiconductors
FEATURES
ORDERING INFORMATION
Standard packing quantities and other packaging data are available at www.standardproducts.philips.com/packaging.
2004 Sep 30
1-of-8 bi-directional translating switches
I
Active LOW Reset Input
3 address pins allowing up to 8 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: SO24, TSSOP24
8-channel I
2
C interface logic; compatible with SMBus standards
24-Pin Plastic TSSOP
24-Pin Plastic SO
ON
PACKAGES
switches
2
2
C switch with reset
C-bus, in any combination
TEMPERATURE RANGE
–40 C to +85 C
–40 C to +85 C
2
C-bus
2
DESCRIPTION
The PCA9548 is a octal bi-directional translating switch controlled
by the I
downstream pairs, or channels. Any individual SCx/SDx channel or
combination of channels can be selected, determined by the
contents of the programmable Control Register.
An active-LOW reset input allows the PCA9548 to recover from a
situation where one of the downstream I
state. Pulling the RESET pin LOW resets the I2C state machine and
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 PCA9548. This allows the use of different bus
voltages on each 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.
2
C-bus. The SCL/SDA upstream pair fans out to eight
ORDER CODE
PCA9548PW
PCA9548D
2
C-buses is stuck in a LOW
DRAWING NUMBER
SOT137-1
SOT355-1
Product data sheet
PCA9548
DD