PI4MSD5V9540B Datasheet, PDF (1/12 Pages) Pericom Semiconductor Corporation – 2 Channel I2C bus Multiplexer

PI4MSD5V9540B
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
2 Channel I2C bus Multiplexer
Features
 1-of-2 bidirectional translating multiplexer
 I2C-bus interface logic
 Operating power supply voltage:1.65 V to 5.5 V
 Allows voltage level translation between 1.2V,
Description
The PI4MSD5V9540B is a 1-of-2 bidirectional
translating multiplexer, controlled via the I2C bus
The SCL/SDA upstream pair fans out to two
SCx/SDx downstream pairs, or channels. Only one
1.8V,2.5 V, 3.3 V and 5 V buses
 Low standby current
 Low Ron switches
 Channel selection via I2C bus
 Power-up with all multiplexer channels deselected
 Capacitance isolation when channel disabled
 No glitch on power-up
 Supports hot insertion
 5 V tolerant inputs
 0 Hz to 400 kHz clock frequency
 ESD protection exceeds 8000 V HBM per JESD22-
SCx/SDx channel is selected at a time, determined
by the contents of the programmable control register.
A power-on reset function puts the registers in their
default state and initializes the I2C bus state machine
with no channels selected.
The pass gates of the multiplexer are constructed
such that the VCC pin can be used to limit the maximum
high voltage that is passed by the PI4MSD5V9540B.
This allows the use of different bus voltages on each
SCx/SDx pair, so that1.2V, 1.8 V, 2.5 V or 3.3 V parts
can communicate with 5 V parts without any additional
A114, and 1000 V CDM per JESD22-C101
 Latch-up testing is done to JEDEC Standard
protection. External pull-up resistors can pull the bus up
to the desired voltage level for this channel. All I/O pins
JESD78 which exceeds 100 mA
 Packages offered: SOIC-8W,MSOP-
are 5 V tolerant.
8U,TDFN2x3-8ZE
Pin Configuration
MSOP
SOIC
TDFN
Pin Description
Pin No Pin Name Type
1
SCL
I/O
2
SDA
I/O
3
VCC
Power
4
SD0
I/O
5
SC0
I/O
6
GND
GND
7
SD1
I/O
8
SC1
I/O
Description
serial clock line
serial data line
supply voltage
serial data 0
serial clock 0
supply ground
serial data 1
serial clock 1
2015-07-0032
PT0522-4 08/18/15
1