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Pericom Semiconductor

PI4MSD5V9545B Datasheet Preview

PI4MSD5V9545B Datasheet

4 Channel I2C bus Switch

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PI4MSD5V9545B/45C
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4 Channel I2C bus Switch with Interrupt Logic and Reset
Features
1-of-4 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 PI4MSD5V9545B is a quad 1-of-4 bidirectional
translating switch, controlled via the I2C bus. The
SCL/SDA upstream pair fans out to four SCx/SDx
downstream pairs, or channels.
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-
Any individual SCx/SDx channel or combination of
channels can be selected, determined by the contents of
the programmable control register. Four interrupt inputs,
INT0 to INT3, one for each of the downstream pairs, are
provided. One interrupt output, INT, acts as an AND of
the four interrupt inputs.
An active LOW reset input allows the PI4MSD5V-
9545B to recover from a situation where one of the
downstream buses is stuck in a LOW state. Pulling the
RESET pin LOW resets the I2C bus state machine and
causes all the channels to be deselected as does the
A114, and 1000 V CDM per JESD22-C101
Latch-up testing is done to JEDEC Standard
internal power-on reset function.
The pass gates of the switches are constructed such
JESD78 which exceeds 100 mA
Packages offered: TSSOP-20L
that the VCC pin can be used to limit the maximum high
voltage which will be passed by the PI4MSD5V9545B.
This allows the use of different bus voltages on each pair,
so that 1.2V,1.8 V or 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
Pin Configuration
are 5 V tolerant.
The PI4MSD5V9545B and PI4MSD5V9545C are
identical except for the fixed portion of the slave address.
TSSOP20
2015-07-0039
PT0536-3 8/18/15
1




Pericom Semiconductor

PI4MSD5V9545B Datasheet Preview

PI4MSD5V9545B Datasheet

4 Channel I2C bus Switch

No Preview Available !

PI4MSD5V9545B/45C
4 Channel I2C bus Switch
with Interrupt Logic and Reset
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Pin Description
Pin No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin Name
A0
A1
RESET
INT0
SD0
SC0
INT1
SD1
SC1
GND
INT2
SD2
SC2
INT3
SD3
SC3
INT
SCL
SDA
VCC
Type
Input
Input
Input
Input
I/O
I/O
Input
I/O
I/O
Ground
Input
I/O
I/O
Input
I/O
I/O
Output
I/O
I/O
Power
Description
address input 0
address input 1
active LOW reset pin
active LOW interrupt input 0
serial data 0
serial clock 0
active LOW interrupt input 1
serial data 1
serial clock 1
supply ground
active LOW interrupt input 2
serial data 2
serial clock 2
active LOW interrupt input 3
serial data 3
serial clock 3
active LOW interrupt output
serial clock line
serial data line
Supply Power
2015-07-0039
PT0536-3 8/18/15
2


Part Number PI4MSD5V9545B
Description 4 Channel I2C bus Switch
Maker Pericom Semiconductor
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PI4MSD5V9545B Datasheet PDF






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