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PCA9548A

Selection guide

Datasheet

PCA9548A
(Product Specification)
07-Jul-09, 26 pages, 144 kB

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PCA9548A - 8-channel I2C-bus switch with reset

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

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 5 V tolerant.

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Features

  • 1-of-8 bidirectional translating switches
  • 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, 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
  • 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
  • Three packages offered: SO24, TSSOP24, and HVQFN24

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Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9548ABSPCA9548ABS,1189352 758 14118Volume productionSOT616-1
(HVQFN24) 		Reel Pack, SMD, 13"Standard Marking
PCA9548ADPCA9548AD,1129352 758 15112Volume productionSOT137TubeStandard Marking
PCA9548ADPCA9548AD,1189352 758 15118Volume productionSOT137Reel Pack, SMD, 13"Standard Marking
PCA9548APWPCA9548APW,1129352 758 16112Volume productionSOT355-1
(TSSOP24) 		TubeStandard Marking
PCA9548APWPCA9548APW,1189352 758 16118Volume productionSOT355-1
(TSSOP24) 		Reel Pack, SMD, 13"Standard Marking

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Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
PCA9548ABSPCA9548ABS,118PCA9548ABS
Always Pb-free
PCA9548ADPCA9548AD,112PCA9548AD
week 13, 2005
PCA9548ADPCA9548AD,118PCA9548AD
week 13, 2005
PCA9548APWPCA9548APW,112PCA9548APW
week 13, 2005
PCA9548APWPCA9548APW,118PCA9548APW
week 13, 2005

Quality and reliability disclaimer

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Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCA9548ABS9352 758 14118  PCA9548ABS,118  1.3700NAMOUSER ELECTRONICS5,140 11/20/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION11,591 11/20/2009Buy online 
    NAMOUSER ELECTRONICS5,140 11/20/2009Buy online 
    NAARROW ELECTRONICS6,000 11/19/2009Buy online 
PCA9548AD9352 758 15112  PCA9548AD,112  1.3700NADIGI-KEY CORPORATION222 11/20/2009Buy onlinenot available
    NAAVNET ELECTRONICS MARKETING144 11/19/2009Buy online 
PCA9548AD9352 758 15118  PCA9548AD,118  1.3700      Order samples
PCA9548APW9352 758 16112  PCA9548APW,112  1.3700ASIASACL - Hong Kong/Chinayes157511/20/2009Buy onlinenot available
PCA9548APW9352 758 16118  PCA9548APW,118  1.3700NAMOUSER ELECTRONICS4 11/20/2009Buy onlineOrder samples
    NAMOUSER ELECTRONICS4 11/20/2009Buy online 
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Applications


Related applications
Intelligent washing machine

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Block diagrams/pinning

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Parametrics/similar products

Type numberPackageOperating
temp.(Cel)		I²C-bus(kHz)Operating voltage(VDC)InputsOutputs# of AddressesReset input pin
PCA9548ABSSOT616-1
(HVQFN24)		-40~854002.3~5.5188yes
PCA9548ADSOT137
-40~854002.3~5.5188yes
PCA9548APWSOT355-1
(TSSOP24)		-40~854002.3~5.5188yes


Similar products
PCA9548A links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

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