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PCA9546A

Selection guide

Datasheet

PCA9546A
(Product Specification)
02-Jul-09, 25 pages, 140 kB

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PCA9546A - 4-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 PCA9546A is a quad bidirectional translating switch controlled via the I2C-bus. The SCL/SDA upstream pair fans out to four 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 PCA9546A 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 (POR) 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 PCA9546A. 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.

Features

  • 1-of-4 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: SO16, TSSOP16, and HVQFN16

Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9546ABSPCA9546ABS,1189352 758 11118Volume productionSOT629-1
(HVQFN16)
Reel Pack, SMD, 13"Standard Marking
PCA9546ADPCA9546AD,1129352 758 12112Volume productionSOT109TubeStandard Marking
PCA9546ADPCA9546AD,1189352 758 12118Volume productionSOT109Reel Pack, SMD, 13"Standard Marking
PCA9546APWPCA9546APW,1129352 758 13112Volume productionSOT403-1
(TSSOP16)
TubeStandard Marking
PCA9546APWPCA9546APW,1189352 758 13118Volume productionSOT403-1
(TSSOP16)
Reel Pack, SMD, 13"Standard Marking

Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
PCA9546ABSPCA9546ABS,118PCA9546ABS
Always Pb-free
PCA9546ADPCA9546AD,112PCA9546AD
week 13, 2005
PCA9546ADPCA9546AD,118PCA9546AD
week 13, 2005
PCA9546APWPCA9546APW,112PCA9546APW
week 13, 2005
PCA9546APWPCA9546APW,118PCA9546APW
week 13, 2005

Quality and reliability disclaimer

Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCA9546ABS9352 758 11118  PCA9546ABS,118  1.0000NAMOUSER ELECTRONICS4,094 11/20/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION17,504 11/20/2009Buy online 
    NAMOUSER ELECTRONICS4,094 11/20/2009Buy online 
    ASIAWPI18,000600011/19/2009Buy online 
PCA9546AD9352 758 12112  PCA9546AD,112  1.0000NAARROW ELECTRONICS285 11/19/2009Buy onlinenot available
PCA9546AD9352 758 12118  PCA9546AD,118  1.0000NAMOUSER ELECTRONICS47 11/20/2009Buy onlineOrder samples
    NAARROW ELECTRONICS285 11/19/2009Buy online 
    NAMOUSER ELECTRONICS47 11/20/2009Buy online 
PCA9546APW9352 758 13112  PCA9546APW,112  1.0000NAARROW ELECTRONICS188 11/19/2009Buy onlinenot available
    NAFUTURE ELECTRONICS1,769 11/19/2009Buy online 
    NAAVNET ELECTRONICS MARKETING78 11/19/2009Buy online 
PCA9546APW9352 758 13118  PCA9546APW,118  0.9800NAMOUSER ELECTRONICS1,097 11/20/2009Buy onlineOrder samples
    NAARROW ELECTRONICS188 11/19/2009Buy online 
    NAAVNET ELECTRONICS MARKETING39 11/19/2009Buy online 
    NADIGI-KEY CORPORATION2,443 11/20/2009Buy online 
    NAMOUSER ELECTRONICS1,097 11/20/2009Buy online 
    ASIAWPI25,000250011/19/2009Buy online 

Applications


Related applications
Intelligent washing machine

Block diagrams/pinning

Parametrics/similar products

Type numberPackageOperating
temp.(Cel)
I²C-bus(kHz)Operating voltage(VDC)InputsOutputs# of AddressesReset input pin
PCA9546ABSSOT629-1
(HVQFN16)
-40~854002.3~5.5148yes
PCA9546ADSOT109
-40~854002.3~5.5148yes
PCA9546APWSOT403-1
(TSSOP16)
-40~854002.3~5.5148yes


Similar products
PCA9546A 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.