PCA9547 | NXP Semiconductors

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Eight-Channel I²C-Bus Multiplexer with Reset

PCA9547 Active

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 controller 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 controller 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.

Block Diagram

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PCA9547

PCA9547 Block Diagram

PCA9547BS, PCA9547D, PCA9547PW

PCA9547BS, PCA9547D, PCA9547PW

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Features

Key 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 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

Buy/Parametrics

3 results

Include 0 NRND

Part

Show description

Order

CAD Model

Interrupt

Operating Temperature (°C)

Reset input pin

Operating voltage (VDC)

Inputs

Outputs

No of Addresses

I2C-bus (kHz)

PCA9547BS
Data Sheet

yes

-40~85

yes

2.3~5.5

1

8

8

400

PCA9547D
Data Sheet

yes

-40~85

yes

2.3~5.5

1

8

8

400

PCA9547PW
Data Sheet

yes

-40~85

yes

2.3~5.5

1

8

8

400

N true 0 PSPPCA9547en 12 Application Note Application Note t789 1 Brochure Brochure t518 1 Data Sheet Data Sheet t520 1 Fact Sheet Fact Sheet t523 1 Package Information Package Information t790 3 Packing Information Packing Information t935 3 User Guide User Guide t792 2 en_US en_US en Data Sheet Data Sheet 1 1 4.0 English 1442060639620719095721 PSP 256.3 KB None None documents None 1442060639620719095721 /docs/en/data-sheet/PCA9547.pdf 256269 /docs/en/data-sheet/PCA9547.pdf PCA9547 documents N N 2014-04-01 8-channel I2C-bus multiplexer with reset /docs/en/data-sheet/PCA9547.pdf /docs/en/data-sheet/PCA9547.pdf Data Sheet N 980000996212993340 2023-08-24 pdf N en Apr 1, 2014 980000996212993340 Data Sheet Y N 8-channel I2C-bus multiplexer with reset Application Note Application Note 1 2 1.0 English Level shifting techniques in I2C-bus design 1442089228752700755238 PSP 53.7 KB Registration without Disclaimer None documents Extended 1442089228752700755238 /secured/assets/documents/en/application-note/AN10441.pdf 53707 /secured/assets/documents/en/application-note/AN10441.pdf AN10441 documents Y N 2016-07-11 AN10441, Level Shifting Techniques in I²C-Bus Design - Application Note /webapp/Download?colCode=AN10441 /secured/assets/documents/en/application-note/AN10441.pdf Application Note N 645036621402383989 2024-07-12 pdf Y en Jun 20, 2007 645036621402383989 Application Note Y N AN10441, Level Shifting Techniques in I²C-Bus Design - Application Note User Guide User Guide 2 3 6.0 Japanese 1442125286808710770774ja PSP 751.0 KB None None documents None 1442125286808710770774 /docs/ja/user-guide/UM10204.pdf 750958 /docs/ja/user-guide/UM10204.pdf UM10204 documents N N 2016-07-12 I2C-bus specification and user manual /docs/ja/user-guide/UM10204.pdf /docs/ja/user-guide/UM10204.pdf User Guide N 132339537837198660 2024-10-24 ja Apr 28, 2014 132339537837198660 User Guide Y N I2C-bus specification and user manual 7.0 English NXP Semiconductors developed a simple bidirectional 2-wire bus for efficient inter-IC control. This bus is called the Inter-IC or I2C-bus. Only two bus lines are required: a serial data line (SDA) and a serial clock line (SCL). Serial, 8-bit oriented, bidirectional data transfers can be made at up to 100 kbit/s in the Standard-mode, up to 400 kbit/s in the Fast-mode, up to 1 Mbit/s in the Fast-mode Plus (Fm+), or up to 3.4 Mbit/s in the High-speed mode. 1442125286808710770774 PSP 751.0 KB None None documents None 1442125286808710770774 /docs/en/user-guide/UM10204.pdf 750958 /docs/en/user-guide/UM10204.pdf UM10204 documents N N 2016-07-12 I2C-bus specification and user manual /docs/en/user-guide/UM10204.pdf /docs/en/user-guide/UM10204.pdf User Guide N 132339537837198660 2024-10-24 pdf N en Oct 1, 2021 132339537837198660 User Guide Y N I2C-bus specification and user manual 4 1.0 English 1442125429801702674389 PSP 749.6 KB Registration without Disclaimer None documents Extended 1442125429801702674389 /secured/assets/documents/en/user-guide/UM10528.pdf 749626 /secured/assets/documents/en/user-guide/UM10528.pdf UM10528 documents Y N 2012-02-06 PCA9632 demonstration board OM13269 /webapp/Download?colCode=UM10528 /secured/assets/documents/en/user-guide/UM10528.pdf User Guide N 132339537837198660 2025-02-10 pdf Y en Feb 6, 2012 132339537837198660 User Guide Y N PCA9632 demonstration board OM13269 Brochure Brochure 1 5 1.0 English 1442124653171725284460 PSP 656.7 KB None None documents None 1442124653171725284460 /docs/en/brochure/75016529.pdf 656663 /docs/en/brochure/75016529.pdf 75016529 documents N N 2011-09-12 Add design fl exibility with multi-channel I2C/SMBus muxes and switches; NXP 2-, 4-, and 8-channel I2C/SMBus muxes and switches PCA954x /docs/en/brochure/75016529.pdf /docs/en/brochure/75016529.pdf Brochure N 712453003803778552 2024-08-21 pdf N en Apr 8, 2018 712453003803778552 Brochure Y N Add design fl exibility with multi-channel I2C/SMBus muxes and switches; NXP 2-, 4-, and 8-channel I2C/SMBus muxes and switches PCA954x Fact Sheet Fact Sheet 1 6 1 English 1557513331449729197888 PSP 436.6 KB None None documents None 1557513331449729197888 /docs/en/fact-sheet/PCA9xx-FactSheet.pdf 436600 /docs/en/fact-sheet/PCA9xx-FactSheet.pdf PCA9XX-FACTSHEET documents N N 2019-05-10 PCA9XX FactSheet /docs/en/fact-sheet/PCA9xx-FactSheet.pdf /docs/en/fact-sheet/PCA9xx-FactSheet.pdf Fact Sheet N 736675474163315314 2022-12-07 pdf N en May 10, 2019 736675474163315314 Fact Sheet Y N PCA9XX FactSheet Package Information Package Information 3 7 1.0 English 1455079389558702995033 PSP 206.7 KB None None documents None 1455079389558702995033 /docs/en/package-information/SOT616-1.pdf 206724 /docs/en/package-information/SOT616-1.pdf SOT616-1 documents N N 2016-02-12 plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mm /docs/en/package-information/SOT616-1.pdf /docs/en/package-information/SOT616-1.pdf Package Information N 302435339416912908 2024-10-21 pdf N en Feb 8, 2016 302435339416912908 Package Information Y N plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mm 8 1.0 English 1455079690215710569313 PSP 361.8 KB None None documents None 1455079690215710569313 /docs/en/package-information/SOT355-1.pdf 361766 /docs/en/package-information/SOT355-1.pdf SOT355-1 documents N N 2016-02-12 plastic thin shrink small outline package; 24 leads; body width 4.4 mm /docs/en/package-information/SOT355-1.pdf /docs/en/package-information/SOT355-1.pdf Package Information N 302435339416912908 2024-10-21 pdf N en Feb 8, 2016 302435339416912908 Package Information Y N plastic thin shrink small outline package; 24 leads; body width 4.4 mm 9 1.0 English 1455078741406708822210 PSP 388.2 KB None None documents None 1455078741406708822210 /docs/en/package-information/SOT137-1.pdf 388157 /docs/en/package-information/SOT137-1.pdf SOT137-1 documents N N 2016-02-12 plastic small outline package; 24 leads; body width 7.5 mm /docs/en/package-information/SOT137-1.pdf /docs/en/package-information/SOT137-1.pdf Package Information N 302435339416912908 2024-10-21 pdf N en Feb 8, 2016 302435339416912908 Package Information Y N plastic small outline package; 24 leads; body width 7.5 mm Packing Information Packing Information 3 10 1.0 English 1442131573152735317266 PSP 200.6 KB None None documents None 1442131573152735317266 /docs/en/packing/SOT616-1_118.pdf 200576 /docs/en/packing/SOT616-1_118.pdf SOT616-1_118 documents N N 2014-01-16 HVQFN24; reel pack; standard product orientation; 12NC ending 118 /docs/en/packing/SOT616-1_118.pdf /docs/en/packing/SOT616-1_118.pdf Packing Information N 145666923842250347 2024-10-21 pdf N en Jan 16, 2014 145666923842250347 Packing Information Y N HVQFN24; reel pack; standard product orientation; 12NC ending 118 11 4.1 English 1442131174599718070838 PSP 232.1 KB None None documents None 1442131174599718070838 /docs/en/packing/SOT355-1_118.pdf 232140 /docs/en/packing/SOT355-1_118.pdf SOT355-1_118 documents N N 2013-04-17 TSSOP24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118 /docs/en/packing/SOT355-1_118.pdf /docs/en/packing/SOT355-1_118.pdf Packing Information N 145666923842250347 2024-10-21 pdf N en Apr 15, 2013 145666923842250347 Packing Information Y N TSSOP24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118 12 4.0 English 1442131585399728249079 PSP 240.7 KB None None documents None 1442131585399728249079 /docs/en/packing/SOT137-1_118.pdf 240736 /docs/en/packing/SOT137-1_118.pdf SOT137-1_118 documents N N 2013-04-17 SO24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118 /docs/en/packing/SOT137-1_118.pdf /docs/en/packing/SOT137-1_118.pdf Packing Information N 145666923842250347 2024-10-21 pdf N en Apr 12, 2013 145666923842250347 Packing Information Y N SO24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118 false 0 PCA9547 downloads en true 1 Y PSP Y Y Application Note 1 /secured/assets/documents/en/application-note/AN10441.pdf 2016-07-11 1442089228752700755238 PSP 2 Jun 20, 2007 Application Note Level shifting techniques in I2C-bus design Registration without Disclaimer /secured/assets/documents/en/application-note/AN10441.pdf English documents 53707 None 645036621402383989 2024-07-12 Y /webapp/Download?colCode=AN10441 AN10441, Level Shifting Techniques in I²C-Bus Design - Application Note /secured/assets/documents/en/application-note/AN10441.pdf documents 645036621402383989 Application Note N en Extended Y pdf 1.0 Y N AN10441, Level Shifting Techniques in I²C-Bus Design - Application Note 53.7 KB AN10441 N 1442089228752700755238 Brochure 1 /docs/en/brochure/75016529.pdf 2011-09-12 1442124653171725284460 PSP 5 Apr 8, 2018 Brochure None /docs/en/brochure/75016529.pdf English documents 656663 None 712453003803778552 2024-08-21 N /docs/en/brochure/75016529.pdf Add design fl exibility with multi-channel I2C/SMBus muxes and switches; NXP 2-, 4-, and 8-channel I2C/SMBus muxes and switches PCA954x /docs/en/brochure/75016529.pdf documents 712453003803778552 Brochure N en None Y pdf 1.0 N N Add design fl exibility with multi-channel I2C/SMBus muxes and switches; NXP 2-, 4-, and 8-channel I2C/SMBus muxes and switches PCA954x 656.7 KB 75016529 N 1442124653171725284460 Data Sheet 1 /docs/en/data-sheet/PCA9547.pdf 2014-04-01 1442060639620719095721 PSP 1 Apr 1, 2014 Data Sheet None /docs/en/data-sheet/PCA9547.pdf English documents 256269 None 980000996212993340 2023-08-24 N /docs/en/data-sheet/PCA9547.pdf 8-channel I2C-bus multiplexer with reset /docs/en/data-sheet/PCA9547.pdf documents 980000996212993340 Data Sheet N en None Y pdf 4.0 N N 8-channel I2C-bus multiplexer with reset 256.3 KB PCA9547 N 1442060639620719095721 Fact Sheet 1 /docs/en/fact-sheet/PCA9xx-FactSheet.pdf 2019-05-10 1557513331449729197888 PSP 6 May 10, 2019 Fact Sheet None /docs/en/fact-sheet/PCA9xx-FactSheet.pdf English documents 436600 None 736675474163315314 2022-12-07 N /docs/en/fact-sheet/PCA9xx-FactSheet.pdf PCA9XX FactSheet /docs/en/fact-sheet/PCA9xx-FactSheet.pdf documents 736675474163315314 Fact Sheet N en None Y pdf 1 N N PCA9XX FactSheet 436.6 KB PCA9XX-FACTSHEET N 1557513331449729197888 Package Information 3 /docs/en/package-information/SOT616-1.pdf 2016-02-12 1455079389558702995033 PSP 7 Feb 8, 2016 Package Information None /docs/en/package-information/SOT616-1.pdf English documents 206724 None 302435339416912908 2024-10-21 N /docs/en/package-information/SOT616-1.pdf plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mm /docs/en/package-information/SOT616-1.pdf documents 302435339416912908 Package Information N en None Y pdf 1.0 N N plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mm 206.7 KB SOT616-1 N 1455079389558702995033 /docs/en/package-information/SOT355-1.pdf 2016-02-12 1455079690215710569313 PSP 8 Feb 8, 2016 Package Information None /docs/en/package-information/SOT355-1.pdf English documents 361766 None 302435339416912908 2024-10-21 N /docs/en/package-information/SOT355-1.pdf plastic thin shrink small outline package; 24 leads; body width 4.4 mm /docs/en/package-information/SOT355-1.pdf documents 302435339416912908 Package Information N en None Y pdf 1.0 N N plastic thin shrink small outline package; 24 leads; body width 4.4 mm 361.8 KB SOT355-1 N 1455079690215710569313 /docs/en/package-information/SOT137-1.pdf 2016-02-12 1455078741406708822210 PSP 9 Feb 8, 2016 Package Information None /docs/en/package-information/SOT137-1.pdf English documents 388157 None 302435339416912908 2024-10-21 N /docs/en/package-information/SOT137-1.pdf plastic small outline package; 24 leads; body width 7.5 mm /docs/en/package-information/SOT137-1.pdf documents 302435339416912908 Package Information N en None Y pdf 1.0 N N plastic small outline package; 24 leads; body width 7.5 mm 388.2 KB SOT137-1 N 1455078741406708822210 Packing Information 3 /docs/en/packing/SOT616-1_118.pdf 2014-01-16 1442131573152735317266 PSP 10 Jan 16, 2014 Packing Information None /docs/en/packing/SOT616-1_118.pdf English documents 200576 None 145666923842250347 2024-10-21 N /docs/en/packing/SOT616-1_118.pdf HVQFN24; reel pack; standard product orientation; 12NC ending 118 /docs/en/packing/SOT616-1_118.pdf documents 145666923842250347 Packing Information N en None Y pdf 1.0 N N HVQFN24; reel pack; standard product orientation; 12NC ending 118 200.6 KB SOT616-1_118 N 1442131573152735317266 /docs/en/packing/SOT355-1_118.pdf 2013-04-17 1442131174599718070838 PSP 11 Apr 15, 2013 Packing Information None /docs/en/packing/SOT355-1_118.pdf English documents 232140 None 145666923842250347 2024-10-21 N /docs/en/packing/SOT355-1_118.pdf TSSOP24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118 /docs/en/packing/SOT355-1_118.pdf documents 145666923842250347 Packing Information N en None Y pdf 4.1 N N TSSOP24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118 232.1 KB SOT355-1_118 N 1442131174599718070838 /docs/en/packing/SOT137-1_118.pdf 2013-04-17 1442131585399728249079 PSP 12 Apr 12, 2013 Packing Information None /docs/en/packing/SOT137-1_118.pdf English documents 240736 None 145666923842250347 2024-10-21 N /docs/en/packing/SOT137-1_118.pdf SO24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118 /docs/en/packing/SOT137-1_118.pdf documents 145666923842250347 Packing Information N en None Y pdf 4.0 N N SO24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118 240.7 KB SOT137-1_118 N 1442131585399728249079 User Guide 2 /docs/en/user-guide/UM10204.pdf 2016-07-12 1442125286808710770774 PSP 3 Oct 1, 2021 User Guide NXP Semiconductors developed a simple bidirectional 2-wire bus for efficient inter-IC control. This bus is called the Inter-IC or I2C-bus. Only two bus lines are required: a serial data line (SDA) and a serial clock line (SCL). Serial, 8-bit oriented, bidirectional data transfers can be made at up to 100 kbit/s in the Standard-mode, up to 400 kbit/s in the Fast-mode, up to 1 Mbit/s in the Fast-mode Plus (Fm+), or up to 3.4 Mbit/s in the High-speed mode. None /docs/en/user-guide/UM10204.pdf English documents 750958 None 132339537837198660 2024-10-24 N /docs/en/user-guide/UM10204.pdf I2C-bus specification and user manual /docs/en/user-guide/UM10204.pdf documents 132339537837198660 User Guide N en None Y pdf 7.0 N N I2C-bus specification and user manual 751.0 KB UM10204 N 1442125286808710770774 /secured/assets/documents/en/user-guide/UM10528.pdf 2012-02-06 1442125429801702674389 PSP 4 Feb 6, 2012 User Guide Registration without Disclaimer /secured/assets/documents/en/user-guide/UM10528.pdf English documents 749626 None 132339537837198660 2025-02-10 Y /webapp/Download?colCode=UM10528 PCA9632 demonstration board OM13269 /secured/assets/documents/en/user-guide/UM10528.pdf documents 132339537837198660 User Guide N en Extended Y pdf 1.0 Y N PCA9632 demonstration board OM13269 749.6 KB UM10528 N 1442125429801702674389 true Y Products

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