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PCA9542A

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Datasheet

PCA9542A
(Product Specification)
15-Jun-09, 22 pages, 122 kB

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PCA9542A - 2-channel I2C-bus multiplexer and interrupt logic

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 PCA9542A 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. Two interrupt inputs, INT0 and INT1, one for each of the SCx/SDx downstream pairs, are provided. One interrupt output, INT, which acts as an AND of the two interrupt inputs, is provided.

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 which will be passed by the PCA9542A. 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 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-2 bidirectional translating multiplexer
  • I2C-bus interface logic; compatible with SMBus
  • 2 active LOW interrupt inputs (INT0, INT1)
  • Active LOW interrupt output (INT)
  • 3 address pins allowing up to 8 devices on the I2C-bus
  • Channel selection via I2C-bus
  • Powers 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 JESD22-A115 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Packages offered: SO14, TSSOP14

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Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9542ADPCA9542AD,1129352 758 01112Volume productionSOT108TubeStandard Marking
PCA9542ADPCA9542AD,1189352 758 01118Volume productionSOT108Reel Pack, SMD, 13"Standard Marking
PCA9542APWPCA9542APW,1129352 758 02112Volume productionSOT402-1
(TSSOP14) 		TubeStandard Marking
PCA9542APWPCA9542APW,1189352 758 02118Volume productionSOT402-1
(TSSOP14) 		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
PCA9542ADPCA9542AD,112PCA9542AD
week 13, 2005
PCA9542ADPCA9542AD,118PCA9542AD
week 13, 2005
PCA9542APWPCA9542APW,112PCA9542APW
week 13, 2005
PCA9542APWPCA9542APW,118PCA9542APW
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
PCA9542AD9352 758 01112  PCA9542AD,112  0.9600      not available
PCA9542AD9352 758 01118  PCA9542AD,118  0.9600NADIGI-KEY CORPORATION3,436 11/7/2009Buy onlineOrder samples
    NAMOUSER ELECTRONICS2,245 11/7/2009Buy online 
    NAFUTURE ELECTRONICS200 11/7/2009Buy online 
PCA9542APW9352 758 02112  PCA9542APW,112  0.9600NAARROW ELECTRONICS538 11/6/2009Buy onlinenot available
    NAMOUSER ELECTRONICS1,757 11/7/2009Buy online 
    NAFUTURE ELECTRONICS1,980 11/7/2009Buy online 
    NAAVNET ELECTRONICS MARKETING1,385 11/7/2009Buy online 
PCA9542APW9352 758 02118  PCA9542APW,118  0.9600NADIGI-KEY CORPORATION3,608 11/7/2009Buy onlineOrder samples
    NAMOUSER ELECTRONICS2,232 11/7/2009Buy online 
    NAFUTURE ELECTRONICS2,500 11/7/2009Buy online 
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Block diagrams/pinning

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Parametrics/similar products

Type numberPackageINTERRUPTOperating
temp.(Cel)		I²C-bus(kHz)Operating voltage(VDC)InputsOutputs# of Addresses
PCA9542ADSOT108
2-1-40~854002.3~5.5128
PCA9542APWSOT402-1
(TSSOP14)		2-1-40~854002.3~5.5128
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