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TCA4311 Status: ACTIVE

Hot Swappable 2-Wire Bus Buffers


      
         
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 TCA4311
fSCLK(Max)(MHz)400  
VCC(Min)(V)2.7  
VCC(Max)(V)5.5  
Pin/Package8MSOP, 8SOIC  
Max Frequency(kHz)400  
Vcc range(V)2.7 to 5.5  
Channel Width2  
Master Side I2C Bus Capacitance Supported(pF)400  
Slave Side I2C Bus Capacitance Supported(pF)400  
5V Tolerant I/OYes  
Open–Drain I/O TypeYes  
Enable PinYes  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • PCA9515A: Dual Bidirectional I2C Bus and SMBus Repeater
  • SN74LVC1G14: Single Schmitt-Trigger Inverter
  • CD74HC4051: High Speed CMOS 8-Channel Analog Multiplexer/Demultiplexer
  • LM358: Dual Operational Amplifiers

Product Information

Features

  • Operating Power-Supply Voltage Range of 2.7-V to 5.5-V
  • Supports Bidirectional Data Transfer of I2C Bus Signals
  • SDA and SCL Lines Are Buffered Which Increases Fanout
  • 1-V Precharge on All SDA and SCL Lines Prevents
    Corruption During Live Board Insertion and Removal From Backplane
  • SDA and SCL Input Lines Are Isolated From Outputs
  • Accommodates Standard Mode and Fast Mode I2C Devices
  • Applications Include Hot Board Insertion and Bus Extension
  • Low ICC Chip Disable of <1 µA
  • READY Open-Drain Output
  • Supports Clock Stretching, Arbitration, and Synchronization
  • Powered-Off High-Impedance I2C Pins
  • Open-Drain I2C Pins
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 8000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

CompactPCI is a trademark of PCI Industrial Computer Manufacturers Group.

DESCRIPTION/ORDERING INFORMATION

The TCA4311 is a hot swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock busses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.

When the I2C bus is idle, the TCA4311 can be put into shutdown mode by setting the EN pin low. When EN is high, the TCA4311 resumes normal operation. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. When READY is high, the SDAIN and SCLIN are connected to SDAOUT and SCLOUT. When the two sides are disconnected, READY is low.

Both the backplane and card may be powered with supply voltages ranging from 2.7 V to 5.5 V, with no restrictions on which supply voltage is higher.

The TCA4311 has standard open-drain I/Os. The size of the pullup resistors to the I/Os depends on the system, but each side of this buffer must have a pullup resistor. The device is designed to work with Standard Mode and Fast Mode I2C devices in addition to SMBus devices. Standard Mode I2C devices only specify 3 mA in a generic I2C system where Standard Mode devices and multiple masters are possible. Under certain conditions, high termination currents can be used.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSamples
TCA4311DACTIVE-40 to 851.55 | 1kuSOIC (D) | 8 View 75 | TUBEPurchase Samples
TCA4311DG4ACTIVE-40 to 851.55 | 1kuSOIC (D) | 8 View 75 | TUBEPurchase Samples
TCA4311DGKRACTIVE-40 to 851.45 | 1kuMSOP (DGK) | 8 View 2500 | LARGE T&R
TCA4311DGKRG4ACTIVE-40 to 851.45 | 1kuMSOP (DGK) | 8 View 2500 | LARGE T&R
TCA4311DRACTIVE-40 to 851.45 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R
TCA4311DRG4ACTIVE-40 to 851.45 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R

* 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

Reported Distributor Inventory as of 10:48 AM GMT, 26 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 18 WeeksTCA4311D
AmericasNewark 215
AsiaFarnell Asia 102
WPI 38
EuropeAvnet-SILICA >1k
Farnell 102
WorldwideDigiKey  Available
TI Lead Time*: 18 WeeksTCA4311DG4
WorldwideDigiKey  Available
TI Lead Time*: 18 WeeksTCA4311DGKR
AmericasArrow >1k
AsiaWPI >1k
EuropeAvnet-SILICA >1k
WorldwideDigiKey 750
Mouser Electronics >1k
TI Lead Time*: 18 WeeksTCA4311DGKRG4
WorldwideDigiKey  Available
TI Lead Time*: 18 WeeksTCA4311DR
AmericasArrow >1k
EuropeAvnet-SILICA >1k
WorldwideDigiKey 953
Mouser Electronics >1k
TI Lead Time*: 18 WeeksTCA4311DRG4
WorldwideDigiKey  Available
View all Distributors  

** 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
TCA4311D RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TCA4311DG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TCA4311DGKR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TCA4311DGKRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TCA4311DR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TCA4311DRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView

* 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 TCA4311 Help

Datasheet

Simulation Models

Customers Who Evaluated This Product Also Evaluated...
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CD74HC4051 High Speed CMOS 8-Channel Analog Multiplexer/Demultiplexer SIGNAL SWITCHES-ANALOG SWITCHES AND MULTIPLEXERS (less than or equal to 5V) TI customers also evaluated this product.
LM358 Dual Operational Amplifiers OPERATIONAL AMPLIFIER-STANDARD LINEAR AMPLIFIER TI customers also evaluated this product.
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