PCA9543AD

2-channel I2C-bus switch with interrupt logic and reset

Generaldescription ThePCA9543A/43B/43Cisabidirectionaltranslatingswitch,controlledbytheI2C-bus. TheSCL/SDAupstreampairfansouttotwodownstreampairs,orchannels. Features ■1-of-2bidirectionaltranslatingswitches ■I2C-businterfacelogic;compatiblewithSMBusstanda

ETC

PCA9543AD

2-channel I2C-bus switch with interrupt logic and reset; 1-of-2 bidirectional translating switches\nI2C-bus interface logic; compatible with SMBus standards\n2 active LOW interrupt inputs\nActive LOW interrupt output\nActive LOW reset input\n2 address pins allowing up to 4 devices on the I2C-bus\nAlternate address versions A and B allow up to a total of 12 devices on the bus for larger systems or to resolve address conflicts\nChannel selection via I2C-bus, in any combination\nPower-up with all switch channels deselected\nLow Ron switches\nAllows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses\nNo glitch on power-up\nSupports hot insertion\nLow standby current\nOperating power supply voltage range of 2.3 V to 5.5 V\n5 V tolerant inputs\n0 Hz to 400 kHz clock frequency\nESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM perJESD22-C101\nLatch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA\nPackages offered: SO14, TSSOP14\n;

The PCA9543A/43B is a bidirectional translating switch, controlled by the I2C-bus. The SCL/SDA upstream pair fans out to two downstream pairs, or channels. Any individual SCx/SDx channels or combination of channels can be selected, determined by the contents of the programmable control register. Two interrupt inputs, INT0 and INT1, one for each of the downstream pairs, are provided. One interrupt output, INT, which acts as an AND of the two interrupt inputs, is provided.\nAn active LOW reset input allows the PCA9543X 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 function.\nThe pass gates of the switches are constructed such that the VDD pin can be used to limit the maximum high voltage which will be passed by the PCA9543X. This allows the use of different bus voltages on each SCx/SDx 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.\nThe PCA9543A and PCA9543B are identical except for the fixed portion of the slave address.\n

恩XP

PCA9543AD

TWO-CHANNEL I2C-BUS SWITCH WITH INTERRUPT LOGIC AND RESET

PCA9543AD

2-channel I2C-bus switch with interrupt logic and reset

ETC

PCA9543AD

I2C Demonstration Board 2005-1 Quick Start Guide

PHI

PCA9543AD

Package：14-SOIC（0.154"，3.90mm 寬）；包裝：卷帶（TR）剪切帶（CT）Digi-Reel? 得捷定制卷帶 類別：集成電路（IC） 專用 描述：IC INTERFACE SPECIALIZED 14SOIC

PCA9543ADG4

TWO-CHANNEL I2C-BUS SWITCH WITH INTERRUPT LOGIC AND RESET

PCA9543ADR

TWO-CHANNEL I2C-BUS SWITCH WITH INTERRUPT LOGIC AND RESET

PCA9543ADRG4

TWO-CHANNEL I2C-BUS SWITCH WITH INTERRUPT LOGIC AND RESET

PCA9543ADR

Package：14-SOIC（0.154"，3.90mm 寬）；包裝：卷帶（TR）剪切帶（CT）Digi-Reel? 得捷定制卷帶 類別：集成電路（IC） 專用 描述：IC INTERFACE SPECIALIZED 14SOIC