PCA9555 Status: ACTIVE

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers

      
         
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See Also

  • TCA9555 - The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent.  It is an enhanced version of the PCA9555 with an extended supply voltage range and performance enhancements related to Power-On Reset and Interrupt.

Datasheet

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 PCA9555
No. of Outputs2  
Interrupt OutputYes  
RatingCatalog  
fSCLK(Max)(MHz)400  
VCC(Min)(V)2.3  
VCC(Max)(V)5.5  
Pin/Package24SOIC, 24TSSOP, 24SSOP, 24SSOP/QSOP, 24TVSOP, 24VQFN  
Operating Temp Range(Celsius)-40 to 85  
Max Frequency(kHz)400  
I2C Address0100 xxx  
# of I/Os16  
Vcc range(V)2.3 to 5.5  
Configuration RegistersYes  
5V Tolerant I/OYes  
Push–Pull I/O TypeYes  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • PCA9535: Remote 16-Bit I2C and SMBus, Low-Power I/O Expander With Interrupt Output and Config Registers
  • PCA9548A: 8-Channel I2C Switch With Reset
  • PCF8575: Remote 16-Bit I2C and SMBus I/O Expander with Interrupt Output
  • TPS73601: Single Output LDO, 400mA, Adj.(1.2 to 5.5V), Cap free, Low Noise, Reverse Current Protection
  • REF5050: Low Noise, Very Low Drift, Precision VOLTAGE REFERENCE
  • TPS61165: High Brightness White LED Driver in 2mm x 2mm QFN Package

More Related Products

Product Information

Features

  • Low Standby-Current Consumption of1 µA Max
  • I2C to Parallel Port Expander
  • Open-Drain Active-Low Interrupt Output
  • 5-V Tolerant I/O Ports
  • Compatible With Most Microcontrollers
  • 400-kHz Fast I2C Bus
  • Address by Three Hardware Address Pins for Use of up to Eight Devices
  • Polarity Inversion Register
  • Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

DESCRIPTION/ORDERING INFORMATION

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].

The PCA9555 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low operation) registers. At power on, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.

The system master can reset the PCA9555 in the event of a timeout or other improper operation by utilizing the power-on reset feature, which puts the registers in their default state and initializes the I2C/SMBus state machine.

The PCA9555 open-drain interrupt (INT) output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed.

INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the PCA9555 can remain a simple slave device.

The device outputs (latched) have high-current drive capability for directly driving LEDs.

Although pin-to-pin and I2C-address is compatible with the PCF8575, software changes are required due to the enhancements.

The PCA9555 is identical to the PCA9535, except for the inclusion of the internal I/O pullup resistor, which pulls the I/O to a default high when configured as an input and undriven.

Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address and allow up to eight devices to share the same I2C bus or SMBus. The fixed I2C address of the PCA9555 is the same as the PCF8575, PCF8575C, and PCF8574, allowing up to eight of these devices in any combination to share the same I2C bus or SMBus.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
PCA9555DBACTIVE-40 to 851.30 | 1kuSSOP (DB) | 24 View 60 | TUBE  Download CAD Format for this FootprintPurchase Samples
PCA9555DBG4ACTIVE-40 to 851.30 | 1kuSSOP (DB) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCA9555DBQRACTIVE-40 to 851.20 | 1kuSSOP/QSOP (DBQ) | 24 View 2500 | LARGE T&R  Download CAD Format for this Footprint
PCA9555DBQRG4ACTIVE-40 to 851.20 | 1kuSSOP/QSOP (DBQ) | 24 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCA9555DBRACTIVE-40 to 851.20 | 1kuSSOP (DB) | 24 View 2000 | LARGE T&R  Download CAD Format for this Footprint
PCA9555DBRG4ACTIVE-40 to 851.20 | 1kuSSOP (DB) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCA9555DGVRACTIVE-40 to 851.20 | 1kuTVSOP (DGV) | 24  2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCA9555DGVRG4ACTIVE-40 to 851.20 | 1kuTVSOP (DGV) | 24  2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCA9555DWACTIVE-40 to 851.30 | 1kuSOIC (DW) | 24 View 25 | TUBE  Download CAD Format for this FootprintPurchase Samples
PCA9555DWG4ACTIVE-40 to 851.30 | 1kuSOIC (DW) | 24 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCA9555DWRACTIVE-40 to 851.20 | 1kuSOIC (DW) | 24 View 2000 | LARGE T&R  Download CAD Format for this Footprint
PCA9555DWRG4ACTIVE-40 to 851.20 | 1kuSOIC (DW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCA9555PWACTIVE-40 to 851.30 | 1kuTSSOP (PW) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCA9555PWE4ACTIVE-40 to 851.30 | 1kuTSSOP (PW) | 24 View 60 | TUBE  Download CAD Format for this FootprintPurchase Samples
PCA9555PWG4ACTIVE-40 to 851.30 | 1kuTSSOP (PW) | 24 View 60 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
PCA9555PWRACTIVE-40 to 851.20 | 1kuTSSOP (PW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCA9555PWRE4ACTIVE-40 to 851.20 | 1kuTSSOP (PW) | 24 View 2000 | LARGE T&R  Download CAD Format for this Footprint
PCA9555PWRG4ACTIVE-40 to 851.20 | 1kuTSSOP (PW) | 24 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
PCA9555RGERACTIVE-40 to 851.20 | 1kuVQFN (RGE) | 24 View 3000 | LARGE T&R  
PCA9555RGERG4ACTIVE-40 to 851.20 | 1kuVQFN (RGE) | 24 View 3000 | LARGE T&R Download CAD Format for this Symbol 

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

  TI Inventory Status Reported Distributor Inventory
PCA9555DBAs of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 10 Weeks AmericasArrow 480
 DigiKey  Available
 Mouser Electronics 63
 Newark 141
 Rochester Electronics 300
 EuropeAvnet-SILICA 420
PCA9555DBG4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 10 Weeks AmericasDigiKey  Available
PCA9555DBQRAs of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 7 Weeks AmericasArrow >1k
 Avnet >1k
 DigiKey 443
 Mouser Electronics >1k
 AsiaWPI >1k
PCA9555DBQRG4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 7 Weeks AmericasDigiKey  Available
PCA9555DBRAs of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 10 Weeks AmericasArrow >1k
 DigiKey >1k
 Mouser Electronics 845
 Newark >1k
 Rochester Electronics >1k
 AsiaWPI >1k
 Wintech >1k
 EuropeAvnet-SILICA >1k
PCA9555DBRG4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 10 Weeks AmericasDigiKey  Available
PCA9555DGVRAs of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasArrow >1k
 DigiKey >1k
 Mouser Electronics >1k
 AsiaWPI >1k
PCA9555DGVRG4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasDigiKey  Available
PCA9555DWAs of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 5 Weeks AmericasArrow 616
 DigiKey  Available
 Mouser Electronics 199
 Newark 50
 Rochester Electronics 175
 EuropeAvnet-SILICA 400
PCA9555DWG4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 5 Weeks AmericasDigiKey  Available
PCA9555DWRAs of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 5 Weeks AmericasArrow >1k
 DigiKey 494
 Newark >1k
 AsiaWPI >1k
 EuropeAvnet-SILICA >1k
PCA9555DWRG4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 5 Weeks AmericasDigiKey  Available
PCA9555PWAs of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 11 Weeks AmericasAvnet 56
 DigiKey  Available
 Mouser Electronics 143
 Newark 50
 EuropeAvnet-SILICA 710
PCA9555PWE4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 11 Weeks AmericasAvnet >1k
 DigiKey  Available
 Mouser Electronics 51
PCA9555PWG4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 11 Weeks AmericasDigiKey  Available
PCA9555PWRAs of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 10 Weeks AmericasDigiKey >1k
 Mouser Electronics >1k
 Newark >1k
 AsiaWPI 752
 EuropeAvnet-SILICA >1k
PCA9555PWRE4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 10 Weeks AmericasDigiKey  Available
PCA9555PWRG4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 10 Weeks AmericasDigiKey  Available
PCA9555RGERAs of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 10 Weeks AmericasArrow >1k
 Avnet >1k
 DigiKey 391
 Mouser Electronics >1k
 Newark >1k
 Rochester Electronics >1k
 AsiaWPI 931
 EuropeAvnet-SILICA >1k
PCA9555RGERG4As of 11:08 AM GMT, 03 Jul 2009As of 11:08 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 10 Weeks AmericasDigiKey  Available
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** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
PCA9555DB RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555DBG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555DBQR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
PCA9555DBQRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
PCA9555DBR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555DBRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555DGVR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555DGVRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555DW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555DWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555DWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555DWRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555PW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555PWE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555PWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555PWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555PWRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555PWRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
PCA9555RGER RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
PCA9555RGERG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for PCA9555 Help

Datasheet

Application Notes

Selection Guides

Part # Name Product Family Comments
TCA9555   Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers     The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent.  It is an enhanced version of the PCA9555 with an extended supply voltage range and performance enhancements related to Power-On Reset and Interrupt.  
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