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TLK2541PFPR Datasheet(PDF) 1 Page - Texas Instruments |
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TLK2541PFPR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 26 page TLK2541 www.ti.com SLLS779B – JANUARY 2008 – REVISED APRIL 2008 1 TO 2.6 GBPS TRANSCEIVER Check for Samples: TLK2541 1 FEATURES • Receiver Differential Input Thresholds 200 mV Minimum 2 • 1 to 2.6 Gigabits Per Second (Gbps) Serializer/Deserializer • 3 V Tolerance on Parallel Data Input Signals • Independent Transmit/Receive Channels for • Selectable 10 or 20 bit Parallel TTL Compatible Asynchronous Data Rate Operation Data Interface • Fast Relock at 1.25 Gbps and 2.5 Gbps for • Industrial Temperature Range –40°C to 85°C EPON OLT Applications • Integrated 50- Ω Termination Resistors on RX • Hot-Plug Protection • Transmit FIFO Decouples Transmit Clock • High-Performance 80-Pin TQFP Package (PFP) From Reference Clock • 2.5-V Power Supply for Low Power Operation APPLICATIONS • Programmable Preemphasis Levels on Serial • Next Generation EPON OLT Systems Output • Ideal for use with EPON OLT MAC Solutions • Interfaces to Backplane, Copper Cables, or such as TK3723 from Teknovus Optical Converters • Gigabit Ethernet and Fibre Channel Links • On-Chip 8-bit/10-bit Encoding/Decoding • On-Chip PLL Provides Clock Synthesis From Low-Speed Reference DESCRIPTION The TLK2541 is a member of the WizardLink transceiver family of multigigabit transceivers, intended for use in high-speed bidirectional point-to-point data transmission systems. The TLK2541 supports an effective serial interface speed of 1 Gbps to 1.3 Gbps or 2 to 2.6 Gbps, providing over 2 Gbps of data bandwidth. The primary application of this chip is to provide high-speed I/O data channels for point-to-point baseband data transmission over controlled impedance media of approximately 50 Ω. The transmission media can be printed-circuit board, copper cables, or fiber-optic cable. The maximum rate and distance of data transfer is dependent upon the attenuation characteristics of the media and the noise coupling to the environment. The TLK2541 allows for independent transmit and receive data rate operation for applications that need asymmetrical data rates such as Passive Optical Networking. This device can also be used to replace parallel data transmission architectures by providing a reduction in the number of traces, connector terminals, and transmit/receive terminals. Parallel data loaded into the transmitter is delivered to the receiver over a serial channel, which can be a coaxial copper cable, a controlled impedance backplane, or an optical link. It is then reconstructed into its original parallel format. It offers significant power and cost savings over parallel solutions, as well as scalability for higher data rates. At full rate, the TLK2541 performs data conversion parallel-to-serial and serial-to-parallel. The clock extraction functions as a physical layer interface device. The serial transceiver interface operates at a maximum speed of 2.6 Gbps. The transmitter latches 20 parallel data at a rate based on the supplied transmit clock (TX_CLK).. The 20-bit word is then transmitted differentially at 20 times the reference clock (REFCLK) rate. The receiver section performs the serial-to-parallel conversion on the input data, synchronizing the resulting 20-bit wide parallel data to the recovered clock (RX_CLK). It then outputs the 20 bit recovered word on the receive data terminals RXD[0:19]. If the internal 8B/10B coding and decoding logic is enabled, 16 bits of data and two bits of control are latched on TX_CLK and the data is encoded into a 20 bit data word to be serialized. Likewise the 20 bit received data word is decoded into a 16 bit data word plus two bits of decode status. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 PowerPAD is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. © 2008, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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