PI4MSD5V9547数据手册集成电路（IC）的信号开关多路复用器解码器规格书PDF

描述 Description

The PI4MSD5V9547 is an octal bidirectional translating multiplexer controlled by the I²C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels.Only one SCx/SDx channel can be selected at a time, determined by the contents of the programmable control register. The device powers up with Channel 0 connected, allowing immediate communication between the master and downstream devices on that channel.An active LOW reset input allows the PI4MSD5V9547 to recover from a situation where one of the downstream I²C-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 internal Power-On Reset (POR) function.The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage which is passed by the PI4MSD5V9547. 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 5V 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.

特性 Features

1-of-8 bidirectional translating multiplexer
I²C-bus interface logic
Operating power supply voltage from 1.65V to 5.5V
Allows voltage level translation between 1.2V, 1.8V, 2.5V, 3.3V and 5V buses
Low standby current
Low Ron switches
Active LOW reset input
Channel selection via I2C bus
Power-up with one channel on
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-24L,TQFN-24ZD