PCA9547

8-channel I2C-bus multiplexer with reset


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Product description

The PCA9547 is an octal bidirectional translating multiplexer controlled by the I2C-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 the downstream I2C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C-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 VDD pin can be used to 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.

Features

  • 1-of-8 bidirectional translating multiplexer
  • I2C-bus interface logic; compatible with SMBus standards
  • Active LOW RESET input
  • 3 address pins allowing up to 8 devices on the I2C-bus
  • Channel selection via I2C-bus, one channel at a time
  • Power-up with all channels deselected except Channel 0 which is connected
  • Low Ron multiplexers
  • 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, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Packages offered: SO24, TSSOP24, HVQFN24
All information on this product information page is subject to the subsequent disclaimers:
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Show functional diagram

Block diagram: PCA9547BS, PCA9547D, PCA9547PW
Block diagram: PCA9547BS, PCA9547D, PCA9547PW
Block diagram: PCA9547BS, PCA9547D, PCA9547PW
Block diagram: PCA9547BS, PCA9547D, PCA9547PW

Products / Packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9547BSPCA9547BS,1189352 807 87118Volume productionSOT616-1
(HVQFN24) 		Reel Pack, SMD, 13"Standard Marking
PCA9547DPCA9547D,1129352 807 88112Volume productionSOT137-1
(SO24) 		TubeStandard Marking
PCA9547DPCA9547D,1189352 807 88118Volume productionSOT137-1
(SO24) 		Reel Pack, SMD, 13"Standard Marking
PCA9547PWPCA9547PW,1129352 807 89112Volume productionSOT355-1
(TSSOP24) 		TubeStandard Marking
PCA9547PWPCA9547PW,1189352 807 89118Volume productionSOT355-1
(TSSOP24) 		Reel Pack, SMD, 13"Standard Marking

Parametrics of this product

Type numberPackageInputsOutputsOperating voltage(VDC)I²C-bus(kHz)Operating
temp.(Cel)		# of AddressesReset input pin
PCA9547BSSOT616-1
(HVQFN24)		182.3~5.5400-40~858yes
PCA9547DSOT137-1
(SO24)		182.3~5.5400-40~858yes
PCA9547PWSOT355-1
(TSSOP24)		182.3~5.5400-40~858yes

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
PCA9547BSPCA9547BS,118PCA9547BSAlways Pb-free11
PCA9547DPCA9547D,112PCA9547DAlways Pb-freenullnull11
PCA9547DPCA9547D,118PCA9547DAlways Pb-freenullnull11
PCA9547PWPCA9547PW,112PCA9547PWAlways Pb-free11
PCA9547PWPCA9547PW,118PCA9547PWAlways Pb-free11
Quality and reliability disclaimer

Quality and reliability disclaimer

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Documentation for this product

TypeFormatTitleDate
Data sheetpdf8-channel I2C-bus multiplexer with reset (v.3.0)2009-07-10
Application notepdfLevel shifting techniques in I2C-bus design (v.1.0)2007-06-20
Application notepdfA guide to designing for ESD and EMC (v.2.0)2010-01-22
BrochurepdfAdd design fl exibility with multi-channel I2C/SMBus muxes and switches; NXP 2-, 4-, and 8-channel I2C/SMBus muxes and switches PCA954x (v.1.0)2008-07-01
LeafletpdfI2C Selection Guide 2H 2011 (v.1.0)2011-09-29
User manualpdfI2C-bus specification and user manual (v.3.0)2007-06-26
User manualpdfI2C Demonstration Board 2005-1 Quick Start Guide (v.1.0)2006-06-13

Ordering & availability

Type numberOrdering code(12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCA9547BS9352 807 87118PCA9547BS,118NADIGI-KEY CORPORATION12,9102/7/2012Buy online 
   NAMOUSER ELECTRONICS4,3052/7/2012Buy online 
   NAMOUSER ELECTRONICS4,3052/7/2012Buy online 
   ASIAWPI900600002/07/2012Buy online 
   NAAVNET ELECTRONICS MARKETING1002/7/2012Buy online 
   NAFUTURE ELECTRONICS182/6/2012Buy online 
   JAPANCHIP ONE STOPyes02/08/2012Buy online 
PCA9547D9352 807 88112PCA9547D,112NAWPG AMERICAS INC.1,2002/7/2012Buy onlinenot available
   ASIAWPI1,200120002/07/2012Buy online 
   NADIGI-KEY CORPORATION8042/7/2012Buy online 
   NAARROW ELECTRONICS6792/6/2012Buy online 
   NAFUTURE ELECTRONICS2872/6/2012Buy online 
   EUARROW EUROPE902/3/2012Buy online 
   NAAVNET ELECTRONICS MARKETING682/7/2012Buy online 
   JAPANCHIP ONE STOPno02/08/2012Buy online 
PCA9547D9352 807 88118PCA9547D,118NAARROW ELECTRONICS1,0002/6/2012Buy online 
   NAAVNET ELECTRONICS MARKETING1752/7/2012Buy online 
   JAPANCHIP ONE STOPno02/08/2012Buy online 
PCA9547PW9352 807 89112PCA9547PW,112NAFUTURE ELECTRONICS3,0292/6/2012Buy onlinenot available
   NADIGI-KEY CORPORATION1,7542/7/2012Buy online 
   NAWPG AMERICAS INC.1,5752/7/2012Buy online 
   ASIAWPI1,575157502/07/2012Buy online 
   NAARROW ELECTRONICS9392/6/2012Buy online 
   NAAVNET ELECTRONICS MARKETING6982/7/2012Buy online 
   NAMOUSER ELECTRONICS1452/7/2012Buy online 
   NAMOUSER ELECTRONICS1452/7/2012Buy online 
   EUFARNELL1122/7/2012Buy online 
   ASELEMENT14 APAC1122/7/2012Buy online 
   JAPANCHIP ONE STOPyes02/08/2012Buy online 
PCA9547PW9352 807 89118PCA9547PW,118ASIAWPI5,000250002/07/2012Buy online 
   NAMOUSER ELECTRONICS2,0122/7/2012Buy online 
   NAMOUSER ELECTRONICS2,0122/7/2012Buy online 
   NAAVNET ELECTRONICS MARKETING1,7722/7/2012Buy online 
   EUFARNELL1122/7/2012Buy online 
   ASELEMENT14 APAC1122/7/2012Buy online 
   JAPANCHIP ONE STOPyes02/08/2012Buy online 

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