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PCA9547D,112 PDF预览

PCA9547D,112

更新时间: 2024-09-19 05:20:31
品牌 Logo 应用领域
恩智浦 - NXP PC
页数 文件大小 规格书
30页 250K
描述
PCA9547 - 8-channel I2C-bus multiplexer with reset SOP 24-Pin

PCA9547D,112 数据手册

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PCA9547  
8-channel I2C-bus multiplexer with reset  
Rev. 4 — 1 April 2014  
Product data sheet  
1. General description  
The PCA9547 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 PCA9547 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 causing all the channels to be deselected, except Channel 0 so  
that the master can regain control of the bus.  
The pass gates of the multiplexers are constructed such that the VDD pin can be used to  
limit the maximum high voltage which will be passed by the PCA9547. 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. Features and benefits  
1-of-8 bidirectional translating multiplexer  
I2C-bus interface logic; compatible with SMBus standards  
Active LOW RESET input  
3 address pins allowing up to 8 devices on the I2C-bus  
Channel selection via I2C-bus, one channel at a time  
Power-up with all channels deselected except Channel 0 which is connected  
Low Ron multiplexers  
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 standby current  
Operating power supply voltage range of 2.3 V to 5.5 V  
5 V tolerant inputs  
0 Hz to 400 kHz clock frequency  
ESD protection exceeds 2000 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: SO24, TSSOP24, HVQFN24  

PCA9547D,112 替代型号

型号 品牌 替代类型 描述 数据表
PCA9547D,118 NXP

完全替代

PCA9547 - 8-channel I2C-bus multiplexer with reset SOP 24-Pin

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