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Pericom Semiconductor

PI4MSD5V9544A Datasheet Preview

PI4MSD5V9544A Datasheet

4 Channel I2C bus Multiplexer

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PI4MSD5V9544A
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4 Channel I2C bus Multiplexer with interrupt logic
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,
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-
A114, and 1000 V CDM per JESD22-C101
Latch-up testing is done to JEDEC Standard
JESD78 which exceeds 100 mA
Packages offered: TSSOP-20L
Only one SCx/SDx channel is selected at a time,
determined by the contents of the programmable control
register. Four interrupt inputs, INT0 to INT3, one for
each of the SCx/SDx downstream pairs, are provided.
One interrupt output, INT, which acts as an AND of the
four interrupt inputs, is provided.
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 which will
be passed by the PI4MSD5V9544A. This allows the use
of different bus voltages on each SCx/SDx pair, so that
1.2V,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 Description
Description
The PI4MSD5V9544A is a 1-of-4 bidirectional
translating multiplexer, controlled via the I2C bus.
The SCL/SDA upstream pair fans out to four
SCx/SDx downstream pairs, or channels.
Pin Configuration
TSSOP20
Pin
No
Pin
Name
Type
Description
1 A0 Input address input 0
2 A1 Input address input 1
3 A2 Input address input 2
4 INT0 Input active LOW interrupt input 0
5 SD0 I/O serial data 0
6 SC0 I/O serial clock 0
7 INT1 Input active LOW interrupt input 1
8 SD1 I/O serial data 1
9 SC1 I/O serial clock 1
10 GND Ground supply ground
11 INT2 Input active LOW interrupt input 2
12 SD2 I/O serial data 2
13 SC2 I/O serial clock 2
14 INT3 Input active LOW interrupt input 3
15 SD3 I/O serial data 3
16 SC3 I/O serial clock 3
17 INT Output active LOW interrupt output
18 SCL I/O serial clock line
19 SDA I/O serial data line
20 VCC Power Power supply
2015-07-0035
PT0525-4 8/18/15
1




Pericom Semiconductor

PI4MSD5V9544A Datasheet Preview

PI4MSD5V9544A Datasheet

4 Channel I2C bus Multiplexer

No Preview Available !

PI4MSD5V9544A
4 Channel I2C/SMBus Multiplexer
with Interrupt Logic
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Block Diagram
Figure 1: Block Diagram
Maximum Ratings
Storage Temperature .................................................55°C to +125°C
Supply Voltage port B .................................................0.5V to +6.0V
Supply Voltage port A ................................................0.5V to +6.0V
DC Input Voltage ....................................................... 0.5V to +6.0V
Control Input Voltage (EN).................................. 0.5V to +6.0V
Total power dissipation (1).......................................................100mW
Input current(EN,VCCA,VCCB,GND).....................................50mA
ESD: HBM Mode .....................................................................8000V
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Recommended operation conditions
Symbol
Parameter
VCC
VEN
VIO
Δt /ΔV
VCCA Positive DC Supply Voltage
Enable Control Pin Voltage
I/O Pin Voltage
Input transition rise or fall time
TA Operating Temperature Range
Min Typ Max Unit
1.65 -
5.5 V
GND
-
5.5 V
GND
-
5.5 V
- - 10 ns/V
40 - +85 °C
2015-07-0035
PT0525-4 8/18/15
2


Part Number PI4MSD5V9544A
Description 4 Channel I2C bus Multiplexer
Maker Pericom Semiconductor
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