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All trademarks are the property of their respective owners. Description
The TLK1221 gigabit Ethernet transceiver provides for high-speed full-duplex point-to-point data transmissions. These devices are based on the timing requirements of the 10-bit interface specification by the IEEE 802.3 Gigabit Ethernet specification. The TLK1221 supports data rates from 0.6 Gbps through 1.3 Gbps. The primary application of these devices is to provide building blocks for point-to-point baseband data transmission over controlled-impedance media of 50 The TLK1221 performs the data serialization, deserialization, and clock extraction functions for a physical layer interface device. The transceiver operates at 1.25 Gbps (typical), providing up to 1 Gbps of data bandwidth over a copper or optical media interface. This device supports the defined 10-bit interface (TBI). In the TBI mode, the serializer/deserializer (SERDES) accepts 10-bit wide 8b/10b parallel encoded data bytes. The parallel data bytes are serialized and transmitted differentially at PECL-compatible voltage levels. The SERDES extracts clock information from the input serial stream and deserializes the data, outputting a parallel 10-bit data byte. A comprehensive series of built-in tests is provided for self-test purposes, including loopback and pseudorandom binary sequence (PRBS) generation and verification. The TLK1221 is housed in a high-performance, thermally enhanced, 40-pin QFN package. Use of this package does not require any special considerations except to note that the pad, which is an exposed die pad on the bottom of the device, is a metallic thermal and electrical conductor. It is required that the TLK1221 pad be soldered to the thermal land on the board as it serves as the main ground connection for the device. The TLK1221 is characterized for operation from –40°C to 85°C. This device uses a 2.5-V supply. The I/O section is 3.3-V compatible. With the 2.5-V supply, the chipset is very power-efficient, dissipating less than 200 mW typical power when operating at 1.25 Gbps. The TLK1221 is designed to be hot-plug capable. A power-on reset causes RBC0, RBC1, the parallel output signal terminals, TXP, and TXN to be held in the high-impedance state. |
| Price | Packaging | CAD Design Tools | Samples | ||||
| Device | Status | Price | Quantity | Package | Pins | Top Side Marking | Package QTY | Package Carrier | Symbols | Samples |
| TLK1221RHAR | ACTIVE | 3.25 | 1ku | QFN (RHA) | 40 | View | 2500 | LARGE T&R | Purchase Samples | |
| TLK1221RHARG4 | ACTIVE | 3.25 | 1ku | QFN (RHA) | 40 | View | 2500 | LARGE T&R | Purchase Samples | |
| TLK1221RHAT | ACTIVE | 3.60 | 1ku | QFN (RHA) | 40 | View | 250 | SMALL T&R | ||
| TLK1221RHATG4 | ACTIVE | 3.60 | 1ku | QFN (RHA) | 40 | View | 250 | SMALL 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.
| Reported Distributor Inventory as of 10:23 AM GMT, 06 Nov 2009 | |||
| Region | Company | In Stock | Purchase |
| TI Lead Time*: 20 WeeksTLK1221RHAR | |||
| None Reported View Distributors | |||
| TI Lead Time*: 20 WeeksTLK1221RHARG4 | |||
| None Reported View Distributors | |||
| TI Lead Time*: 8 WeeksTLK1221RHAT | |||
| Americas | Arrow | 250 | |
| Asia | Farnell Asia | 14 | |
| Europe | Farnell | 14 | |
| Worldwide | Mouser Electronics | 16 | |
| TI Lead Time*: 8 WeeksTLK1221RHATG4 | |||
| None Reported View 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.
| Product Content | DPPM / MTBF / FIT Rate | ||||
| Device | Eco Plan* | Lead / Ball Finish | MSL Rating / Peak Reflow | Details | Details |
TLK1221RHAR  | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-3-260C-168 HR | View | View |
| TLK1221RHARG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-3-260C-168 HR | View | View |
| TLK1221RHAT | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-3-260C-168 HR | View | View |
| TLK1221RHATG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-3-260C-168 HR | View | View |
* 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.
Most useful technical documents for TLK1221 
| Name | Part # | Company | Tool / Software Type |
| TLK1221EVM Evaluation Module | TLK1221EVM | Texas Instruments | Development Boards/EVMs |
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. The transmission media can be printed-circuit board traces, copper cables or fiber-optical media. The ultimate rate and distance of data transfer is dependent upon the attenuation characteristics of the media and the noise coupling to the environment.