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PCA9549

Selection guide

Datasheet

PCA9549
(Product Specification)
13-Jul-09, 25 pages, 140 kB

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PCA9549 - Octal bus switch with individually I2C-bus controlled enables

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 PCA9549 provides eight bits of high speed TTL-compatible bus switching controlled by the I2C-bus. The low ON-state resistance of the switch allows connections to be made with minimal propagation delay. Any individual A to B channel or combination of channels can be selected via the I2C-bus, determined by the contents of the programmable Control register. When the I2C-bus bit is HIGH (logic 1), the switch is on and data can flow from Port A to Port B, or vice versa. When the I2C-bus bit is LOW (logic 0), the switch is open, creating a high-impedance state between the two ports, which stops the data flow.

An active LOW reset input (RESET) allows the PCA9549 to recover from a situation where the I2C-bus is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C-bus state machine and causes all the bits to be open, as does the internal power-on reset function.

Three address pins allow up to eight devices on the same bus.

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Features

  • 8-bit bus switch (CBT)
  • 5 Ohm switch connection between two ports
  • I2C-bus interface logic; compatible with SMBus standards
  • Active LOW RESET input
  • 3 address pins allowing up to 8 devices on the I2C-bus
  • Bit selection via I2C-bus, in any combination
  • Power-up with all bits deselected
  • Low Ron switches
  • 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: SO24, TSSOP24, HVQFN24

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Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
PCA9549BSPCA9549BS,1189352 822 28118Volume productionSOT616-1
(HVQFN24) 		Reel Pack, SMD, 13"Standard Marking
PCA9549DPCA9549D,1129352 822 29112Volume productionSOT137TubeStandard Marking
PCA9549DPCA9549D,1189352 822 29118Volume productionSOT137Reel Pack, SMD, 13"Standard Marking
PCA9549PWPCA9549PW,1129352 822 31112Volume productionSOT355-1
(TSSOP24) 		TubeStandard Marking
PCA9549PWPCA9549PW,1189352 822 31118Volume 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
PCA9549BSPCA9549BS,118PCA9549BS
Always Pb-free
PCA9549DPCA9549D,112PCA9549D
Always Pb-free
PCA9549DPCA9549D,118PCA9549D
Always Pb-free
PCA9549PWPCA9549PW,112PCA9549PW
Always Pb-free
PCA9549PWPCA9549PW,118PCA9549PW
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
PCA9549BS9352 822 28118  PCA9549BS,118  NADIGI-KEY CORPORATION10,300 11/20/2009Buy onlineOrder samples
    NAFUTURE ELECTRONICS137 11/19/2009Buy online 
PCA9549D9352 822 29112  PCA9549D,112  NADIGI-KEY CORPORATION446 11/20/2009Buy onlineOrder samples
PCA9549D9352 822 29118  PCA9549D,118  NADIGI-KEY CORPORATION1,000 11/20/2009Buy onlinenot available
PCA9549PW9352 822 31112  PCA9549PW,112  NADIGI-KEY CORPORATION1,116 11/20/2009Buy onlinenot available
PCA9549PW9352 822 31118  PCA9549PW,118  NAMOUSER ELECTRONICS25 11/20/2009Buy onlineOrder samples
    NAMOUSER ELECTRONICS25 11/20/2009Buy online 
    NAFUTURE ELECTRONICS100 11/19/2009Buy 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
PCA9549BSSOT616-1
(HVQFN24)		-40~854002.3~5.5888yes
PCA9549DSOT137
-40~854002.3~5.5888yes
PCA9549PWSOT355-1
(TSSOP24)		-40~854002.3~5.5888yes


Similar products
PCA9549 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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