PCA9543A/43B 2 2-channel I C-bus switch with interrupt logic and reset Rev. 8 3 April 2014 Product data sheet 1. General description 2 The PCA9543A/43B is a bidirectional translating switch, controlled by the I C-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. An active LOW reset input allows the PCA9543X to recover from a situation where one of 2 the downstream I C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets 2 the I C-bus state machine and causes all the channels to be deselected, as does the internal power-on reset function. The pass gates of the switches are constructed such that the V pin can be used to limit DD 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. The PCA9543A and PCA9543B are identical except for the fixed portion of the slave address. 2. Features and benefits 1-of-2 bidirectional translating switches 2 I C-bus interface logic compatible with SMBus standards 2 active LOW interrupt inputs Active LOW interrupt output Active LOW reset input 2 2 address pins allowing up to 4 devices on the I C-bus Alternate address versions A and B allow up to a total of 12 devices on the bus for larger systems or to resolve address conflicts 2 Channel selection via I C-bus, in any combination Power-up with all switch channels deselected Low R switches on 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 VPCA9543A/43B NXP Semiconductors 2 2-channel I C-bus switch with interrupt logic and reset 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: SO14, TSSOP14 3. Ordering information Table 1. Ordering information Type number Topside Package marking Name Description Version PCA9543AD PCA9543A SO14 plastic small outline package 14 leads body width 3.9 mm SOT108-1 PCA9543APW PA9543A TSSOP14 plastic thin shrink small outline package 14 leads SOT402-1 body width 4.4 mm PCA9543BPW PA9543B TSSOP14 plastic thin shrink small outline package 14 leads SOT402-1 body width 4.4 mm 3.1 Ordering options Table 2. Ordering options Type number Orderable Package Packing method Minimum Temperature part number order quantity PCA9543AD PCA9543AD,112 SO14 Standard marking 1140 T = 40 Cto+85 C amb * ICs tube - DSC bulk pack PCA9543AD,118 SO14 Reel 13 Q1/T1 2500 T = 40 Cto+85 C amb *standard mark SMD PCA9543APW PCA9543APW,112 TSSOP14 Standard marking 2400 T = 40 Cto+85 C amb * ICs tube - DSC bulk pack PCA9543APW,118 TSSOP14 Reel 13 Q1/T1 2500 T = 40 Cto+85 C amb *standard mark SMD PCA9543BPW PCA9543BPW,118 TSSOP14 Reel 13 Q1/T1 2500 T = 40 Cto+85 C amb *standard mark SMD PCA9543A 43B All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 8 3 April 2014 2 of 28