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PCA9540B

Selection guide

Datasheet

PCA9540B
(Product Specification)
03-Sep-09, 22 pages, 121 kB

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PCA9540B - 2-channel I2C-bus multiplexer

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 PCA9540B is a 1-of-2 bidirectional translating multiplexer, controlled via the I2C-bus. The SCL/SDA upstream pair fans out to two SCx/SDx downstream pairs, or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register.

A power-on reset function puts the registers in their default state and initializes the I2C-bus state machine with no channels selected.

The pass gates of the multiplexer are constructed such that the VDD pin can be used to limit the maximum high voltage that will be passed by the PCA9540B. This allows the use of different bus voltages on each SCx/SDx 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 can pull the bus up to the desired voltage level for this channel. All I/O pins are 5 V tolerant.

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Features

  • 1-of-2 bidirectional translating multiplexer
  • I2C-bus interface logic; compatible with SMBus standards
  • Channel selection via I2C-bus
  • Power up with all multiplexer 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 JESD2-A115 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Packages offered: SO8, TSSOP8, XSON8U

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Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9540BDPCA9540BD,1129352 760 35112Volume productionSOT96TubeStandard Marking
PCA9540BDPCA9540BD,1189352 760 35118Volume productionSOT96Reel Pack, SMD, 13"Standard Marking
PCA9540BDPPCA9540BDP,1189352 760 36118Volume productionSOT505Reel Pack, SMD, 13"Standard Marking
PCA9540BDP/GPCA9540BDP/G,1189352 809 89118Volume productionSOT505Reel Pack, SMD, 13"Standard Marking
PCA9540BGDPCA9540BGD,1259352 901 65125Volume productionSOT996-2
(XSON8U) 		Reel Pack, Reverse, ReverseStandard Marking

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Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
PCA9540BDPCA9540BD,112PCA9540BD
week 5, 2005
PCA9540BDPCA9540BD,118PCA9540BD
week 5, 2005
PCA9540BDPPCA9540BDP,118PCA9540BDP
week 12, 2005
PCA9540BDP/GPCA9540BDP/G,118PCA9540BDP_G
Always Pb-free
PCA9540BGDPCA9540BGD,125PCA9540BGD
Always Pb-free

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
PCA9540BD9352 760 35112  PCA9540BD,112  0.8900NAARROW ELECTRONICS2,067 11/19/2009Buy onlinenot available
    NADIGI-KEY CORPORATION232 11/20/2009Buy online 
    NAFUTURE ELECTRONICS990 11/19/2009Buy online 
    NAAVNET ELECTRONICS MARKETING475 11/19/2009Buy online 
PCA9540BD9352 760 35118  PCA9540BD,118  0.8900NAARROW ELECTRONICS2,067 11/19/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION2,242 11/20/2009Buy online 
    NAFUTURE ELECTRONICS2,500 11/19/2009Buy online 
PCA9540BDP9352 760 36118  PCA9540BDP,118  0.8900NAFUTURE ELECTRONICS610 11/19/2009Buy onlineOrder samples
    NAAVNET ELECTRONICS MARKETING2,070 11/19/2009Buy online 
PCA9540BDP/G9352 809 89118  PCA9540BDP/G,118        Order samples
PCA9540BGD9352 901 65125  PCA9540BGD,125        Order samples
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Applications


Related applications
Intelligent washing machine

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Parametrics/similar products

Type numberPackageOperating
temp.(Cel)		I²C-bus(kHz)Operating voltage(VDC)InputsOutputs# of Addresses
PCA9540BDSOT96
-40~854002.3~5.5121
PCA9540BDPSOT505
-40~854002.3~5.5121
PCA9540BDP/GSOT505
-40~854002.3~5.5121


Similar products
PCA9540B 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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