PCA9542A 2 2-channel I C-bus multiplexer and interrupt logic Rev. 5.1 15 July 2015 Product data sheet 1. General description 2 The PCA9542A is a 1-of-2 bidirectional translating multiplexer, controlled via the I C-bus. The SCL/SDA upstream pair fans out to two SCx/SDx downstream pairs, or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register. Two interrupt inputs, INT0 and INT1, one for each of the SCx/SDx downstream pairs, are provided. One interrupt output, INT, which acts as an AND of the two interrupt inputs, is provided. 2 A power-on reset function puts the registers in their default state and initializes the I C-bus state machine with no channels selected. The pass gates of the multiplexer are constructed such that the V pin can be used to DD limit the maximum high voltage which will be passed by the PCA9542A. 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. 2. Features and benefits 1-of-2 bidirectional translating multiplexer 2 I C-bus interface logic compatible with SMBus 2 active LOW interrupt inputs (INT0, INT1) Active LOW interrupt output (INT) 2 3 address pins allowing up to 8 devices on the I C-bus 2 Channel selection via I C-bus Powers up with all multiplexer 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 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: SO14, TSSOP14PCA9542A NXP Semiconductors 2 2-channel I C-bus multiplexer and interrupt logic 3. Ordering information Table 1. Ordering information Type number Topside Package marking Name Description Version PCA9542AD PCA9542AD SO14 plastic small outline package 14 leads body width 3.9 mm SOT108-1 PCA9542APW PA9542A 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 range part number order quantity PCA9542AD PCA9542AD,112 SO14 Standard marking 1140 T = 40 C to +85 C amb *ICs tube - DSC bulk pack PCA9542AD,118 SO14 Reel 13 Q1/T1 2500 T = 40 C to +85 C amb *Standard mark SMD PCA9542APW PCA9542APW,112 TSSOP14 Standard marking 2400 T = 40 C to +85 C amb *ICs tube - DSC bulk pack PCA9542APW,118 TSSOP14 Reel 13 Q1/T1 2500 T = 40 C to +85 C amb *Standard mark SMD PCA9542A All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 5.1 15 July 2015 2 of 27