PCA9548A

8-channel I²C-bus switch with reset


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The PCA9548A is an octal bidirectional translating switch controlled via the I²C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register.

An active LOW reset input allows the PCA9548A 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.

The 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 PCA9548A. This allows the use of different bus voltages on each pair, so that 1.8 V or 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 6 V tolerant.

Features and benefits

  • 1-of-8 bidirectional translating switches
  • I²C-bus interface logic; compatible with SMBus standards
  • Active LOW reset input
  • Three address pins allowing up to eight devices on the I²C-bus
  • Channel selection via I²C-bus, in any combination
  • Power-up with all switch channels deselected
  • Low Ron switches
  • 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
  • 6 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
  • Three packages offered: SO24, TSSOP24, and HVQFN24
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Parametric search

Show functional diagram

Block diagram: PCA9548ABS, PCA9548AD, PCA9548APW
Block diagram: PCA9548ABS, PCA9548AD, PCA9548APW

Parametrics of this product

Type numberPackage versionInterruptOperating Temperature (Cel)Reset input pinOperating voltage (VDC)InputsOutputsNo of AddressesI2C-bus (kHz)
PCA9548ABSSOT616-1yes-40~85yes2.3~5.5188400
PCA9548ADSOT137-1yes-40~85yes2.3~5.5188400
PCA9548APWSOT355-1yes-40~85yes2.3~5.5188400

Package

Type numberPackageOutline versionReflow-/Wave solderingPackingProduct statusMarkingOrderable part number, (Ordering code (12NC))
PCA9548ABSHVQFN24
(SOT616-1)
sot616-1_posot616-1_fr
Reel Pack, SMD, 13", Q2/T3Active548APCA9548ABSHP
( 9352 758 14128 )
Reel Pack, SMD, 13" Q1/T1Active548APCA9548ABS,118
( 9352 758 14118 )
PCA9548ADSO24
(SOT137-1)
sot137-1_posot137-1_fr
SO-SOJ-WAVE
Reel Pack, SMD, 13" Q1/T1ActivePCA9548ADPCA9548AD,118
( 9352 758 15118 )
Bulk PackActivePCA9548ADPCA9548AD,112
( 9352 758 15112 )
PCA9548APWTSSOP24
(SOT355-1)
sot355-1_posot355-1_fr
SSOP-TSSOP-VSO-WAVE
Reel Pack, SMD, 13" Q1/T1ActivePCA9548APCA9548APW,118
( 9352 758 16118 )
Bulk PackActivePCA9548APCA9548APW,112
( 9352 758 16112 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFR (FIT)MTBF (hour)MSLMSL LF
PCA9548ABSPCA9548ABSHPPCA9548ABSAlways Pb-free0.02.05E811
PCA9548ABSPCA9548ABS,118PCA9548ABSAlways Pb-free0.02.05E811
PCA9548ADPCA9548AD,118PCA9548ADweek 13, 20050.02.05E811
PCA9548ADPCA9548AD,112PCA9548ADweek 13, 20050.02.05E811
PCA9548APWPCA9548APW,118PCA9548APWweek 13, 20050.02.05E811
PCA9548APWPCA9548APW,112PCA9548APWweek 13, 20050.02.05E811
Quality and reliability disclaimer

Quality and reliability disclaimer

Important Legal Notice on the product/generic quality information, No Warranty

NXP Semiconductors is providing this data for your convenience only. Please note however that NO WARRANTY, REPRESENTATION, GUARANTEE OR LEGALLY BINDING PRODUCT DESCRIPTION is provided by publishing this informational data, nor does NXP Semiconductors acknowledge or accept any liability related thereto. The documentation and data on NXP Semiconductors products can be found in the data sheets as officially published by NXP Semiconductors. For all purchase of products from NXP Semiconductors the NXP Semiconductors' General Terms and Conditions of Commercial Sale will apply.

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Documentation for this product

File nameTitleTypeFormatDate
PCA9548A8-channel I2C-bus switch with resetData sheetpdf2014-03-31
AN10441Level shifting techniques in I2C-bus designApplication notepdf2007-06-20
AN262PCA954X FAMILY OF I²C / SMBus MULTIPLEXERS and SWITCHESApplication notepdf2004-10-01
75016529Add design fl exibility with multi-channel I2C/SMBus muxes and switches; NXP 2-, 4-, and 8-channel I2C/SMBus muxes and switches PCA954xBrochurepdf2008-07-01
PCA9548AExpert mode sample code PCA9548A Design supporttxt2014-12-10
75017540NXP I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns Leafletpdf2014-08-01
UM10204I2C-bus specification and user manualUser manualpdf2014-04-28
UM10206I2C Demonstration Board 2005-1 Quick Start GuideUser manualpdf2006-06-12
SOT137-1_118SO24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packingpdf2013-04-12
SO-SOJ-WAVEFootprint for wave solderingWave solderingpdf2009-10-08
sot137-1_poplastic small outline package; 24 leads; body width 7.5 mmOutline drawingpdf2009-10-08
sot137-1_frFootprint for reflow soldering SOT137-1Reflow solderingpdf2010-01-15
SOT355-1_118TSSOP24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packingpdf2013-04-15
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave solderingpdf2009-10-08
sot355-1_frFootprint for reflow soldering SOT355-1Reflow solderingpdf2009-10-08
sot355-1_poplastic thin shrink small outline package; 24 leads; body width 4.4 mmOutline drawingpdf2009-10-08
SOT616-1_115HVQFN24; Reel pack; SMD, 7" Q1/T1 Standard product orientation Orderable part number ending ,115 or X Ordering code (12NC) ending 115Packingpdf2013-04-23
SOT616-1_118HVQFN24; reel pack; standard product orientation; 12NC ending 118Packingpdf2014-01-16
SOT616-1_128HVQFN24; Reel pack; SMD, 13", Q2/T3 Turned product orientation Orderable part number ending ,128 or HP Ordering code (12NC) ending 128Packingpdf2014-07-16
sot616-1_poplastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mmOutline drawingpdf2002-10-21
sot616-1_frFootprint for reflow soldering SOT616-1Reflow solderingpdf2009-10-08

Ordering & availability

Type numberOrdering code (12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCA9548ABS9352 758 14128PCA9548ABSHP       
PCA9548ABS9352 758 14118PCA9548ABS,118NADigiKey14,670112/19/2014Buy online 
   NAAvnet Express4,998112/19/2014Buy online 
   GLOBALArrow Electronics3,186119/12/2014Buy online 
   NAMouser Electronics36512/20/14Buy online 
PCA9548AD9352 758 15118PCA9548AD,118ASIAChip One Stop96912/19/2014Buy online 
   NAMouser Electronics44212/20/14Buy online 
PCA9548AD9352 758 15112PCA9548AD,112GLOBALArrow Electronics1,383119/12/2014Buy onlineNot available
   NADigiKey994112/19/2014Buy online 
   NAMouser Electronics60212/20/14Buy online 
   NAAvnet Express273112/19/2014Buy online 
   EUAvnet Express1203012/19/2014Buy online 
PCA9548APW9352 758 16118PCA9548APW,118GLOBALArrow Electronics97,500250019/12/2014Buy online 
   ASIAWPI12,500250012/21/2014Buy online 
   NAMouser Electronics4,52212/20/14Buy online 
   NADigiKey2,197112/19/2014Buy online 
   EUFarnell Europe1,003119/12/2014Buy online 
   ASIAChip One Stop35912/19/2014Buy online 
   ASIAElement 1444119/12/2014Buy online 
PCA9548APW9352 758 16112PCA9548APW,112GLOBALArrow Electronics5,4816319/12/2014Buy onlineNot available
   NAFuture Electronics4,486112/20/2014Buy online 
   NAAvnet Express3,607112/19/2014Buy online 
   NAMouser Electronics1,90812/20/14Buy online 
   NADigiKey1,331112/19/2014Buy online 
   EUFarnell Europe1,003119/12/2014Buy online 
   ASIAWPI630157512/21/2014Buy online 
   NANewark element14181157513/12/2014Buy online 
   ASIAElement 1444119/12/2014Buy online 

Sample

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Technical support

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Models

TitleTypeDate
Expert mode sample code PCA9548A Design support2014-12-10

Frequently asked questions and Community discussions

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{"subtitle":"8-channel I²C-bus switch with reset","category":["Interface and connectivity","I²C","I²C multiplexers/switches",""],"basictype":["PCA9548ABS","PCA9548AD","PCA9548APW","PCA9548A"]}

Demo boards

OM13495OM13495

Surface Mount to DIP Evaluation Board OM13495

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