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TRF7900A Status: NRND

Wireless 27MHz Dual receiver


      
         
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Alert Icon   NRND: This product is not recommended for new designs. However, the device, tool, or software continues to be in production to support existing customers. TI does not recommend using this part in a new design. TI encourages designers to consider alternative products for new designs.

Replaced By:

  • CC2500 The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 

Product Information

Features

  • 23 Discrete Components Intgrated into One Chip
    • Only External Components are Bypass and Filter Capacitors, and One Crystal
  • RF Tuner, Mixer, Transistors, Passives, Coils, and Ceramic Filter Functionality All on One Chip
  • Integrated Phase Locked Loop
  • 8 User-Selectable Frequencies
    • Each Channel (Mouse and Keyboard) Can Independently Select Any of the Available Frequencies
  • Internally Generated 6-MHz Clock to Drive USB Microcontroller
  • High Data Throughput Rate
    • 5-kHz Square Wave Simultaneously per Channel
    • 10 kbps Miller Encoded Data
  • I2C Control Interface
  • Received Signal Strength Indicator
  • 5-V Supply
  • Available in 28-Pin TSSOP (PW) Pacakge
  • APPLICATIONS
    • 27-MHz Wireless Mouse and Keyboard Systems
    • Human Interface Devices
    • Wireless Control
    • Remote Control Toys
    • Wireless Headset
    • Remote instrumentation

Description

The TRF7900 is a dual integrated RF transceiver designed for human-interface devices (HID). Operating at 27 MHz, it integrates multiple components (PLL, RF mixer, simulated SAW filter, tuning circuit, and miscellaneous passive components) to provide frequency selection from 8 discrete channels. This integration lowers component, manufacturing and system costs.

The TRF7900 simplifies system design by reducing system component count and manual circuit tuning. By integrating the PLL, SAW filter, and RF mixer, the TRF7900 eliminates the manual tuning of RLC circuits required in traditional implementations.

The receiver also generates 8 frequencies that can be programmatically selected via the I2C interface bus for both the mouse channel and/or the keyboard channel. Another 6-MHz clock is internally generated to clock the USB microcontroller; this enables a single crystal to be used to supply the clock needs for the receiver channels and the microcontroller.

The optimized receiver design enables simultaneous reception on both parallel channels up to 5 kHz (10 kbps Miller encoding) per channel. A receive strength signal indicator register can be read via the I2C bus to determine the signal strength. Correlating the RSSI reading to the packet error rate enables the controller to diagnose the signal and understand the user condition.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierFootprintsSamples
TRF7900APWNRND-40 to 852.50 | 1kuTSSOP (PW) | 28 View 50 | TUBE Download CAD Format for this FootprintNot Available
TRF7900APWG4NRND-40 to 852.50 | 1kuTSSOP (PW) | 28 View 50 | TUBE Download CAD Format for this FootprintNot Available
TRF7900APWRNRND-40 to 852.25 | 1kuTSSOP (PW) | 28 View 2000 | LARGE T&R Download CAD Format for this FootprintNot Available
TRF7900APWRG4NRND-40 to 852.25 | 1kuTSSOP (PW) | 28 View 2000 | LARGE T&R Download CAD Format for this FootprintNot Available

* 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 9:51 AM GMT, 06 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 4 WeeksTRF7900APW
AmericasNewark 185
WorldwideDigiKey 472
TI Lead Time*: 4 WeeksTRF7900APWG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksTRF7900APWR
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksTRF7900APWRG4
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
TRF7900APW  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TRF7900APWG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TRF7900APWR  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TRF7900APWRG4  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 TRF7900A Help

Datasheet

Tools & Software

NamePart # Company Tool / Software Type
RF Transceiver Power Consumption CalculatorRF-POWERCALCTexas InstrumentsCalculation Utilities

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