PCA9547 2 8-channel I C-bus multiplexer with reset Rev. 4 1 April 2014 Product data sheet 1. General description 2 The PCA9547 is an octal bidirectional translating multiplexer controlled by the I C-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 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 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 V pin can be used to DD 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 2 I C-bus interface logic compatible with SMBus standards Active LOW RESET input 2 3 address pins allowing up to 8 devices on the I C-bus 2 Channel selection via I C-bus, one channel at a time Power-up with all channels deselected except Channel 0 which is connected Low R multiplexers 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: SO24, TSSOP24, HVQFN24PCA9547 NXP Semiconductors 2 8-channel I C-bus multiplexer with reset 3. Ordering information Table 1. Ordering information Type number Topside Package marking Name Description Version PCA9547D PCA9547D SO24 plastic small outline package 24 leads body width 7.5 mm SOT137-1 PCA9547PW PCA9547PW TSSOP24 plastic thin shrink small outline package 24 leads body width SOT355-1 4.4 mm PCA9547BS 9547 HVQFN24 plastic thermal enhanced very thin quad flat package no leads SOT616-1 24 terminals body 4 4 0.85 mm 3.1 Ordering options Table 2. Ordering options Type number Orderable part Package Packing method Minimum Temperature range number order quantity PCA9547D PCA9547D,112 SO24 Standard marking 1200 T = 40 C to +85 C amb * ICs tube - DSC bulk pack PCA9547D,118 SO24 Reel 13 Q1/T1 1000 T = 40 C to +85 C amb *Standard mark SMD PCA9547PW PCA9547PW,112 TSSOP24 Standard marking 1575 T = 40 C to +85 C amb * ICs tube - DSC bulk pack PCA9547PW,118 TSSOP24 Reel 13 Q1/T1 2500 T = 40 C to +85 C amb *Standard mark SMD PCA9547BS PCA9547BS,118 HVQFN24 Reel 13 Q1/T1 6000 T = 40 C to +85 C amb *Standard mark SMD PCA9547 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 4 1 April 2014 2 of 30