TLK2701 Datasheet, PDF (1/21 Pages) Texas Instruments – 1.6 TO 2.7 GBPS TRANSCEIVER

TLK2701
1.6 TO 2.7 GBPS TRANSCEIVER
D 1.6 to 2.7 Gigabits Per Second (Gbps)
Serializer/Deserializer
D Hot-Plug Protection
D High-Performance 64-Pin VQFP Thermally
Enhanced Package (PowerPAD)
D 2.5-V Power Supply for Low Power
Operation
D Programmable Voltage Output Swing on
Serial Output
D Interfaces to Backplane, Copper Cables, or
Optical Converters
D On-Chip 8-Bit/10-Bit Encoding/Decoding,
Comma Detect
SLLS429B – AUGUST 2000 – REVISED MAY 2002
D On-Chip PLL Provides Clock Synthesis
From Low-Speed Reference
D Receiver Differential Input Thresholds
200 mV Minimum
D Low Power: < 500 mW
D 3 V Tolerance on Parallel Data Input Signals
D 16-Bit Parallel TTL Compatible Data
Interface
D Ideal for High-Speed Backplane
Interconnect and Point-to-Point Data Link
D Industrial Temperature Range (–40°C to
85°C)
D Loss of Signal (LOS) Detection
description
The TLK2701 is a member of the transceiver family of multigigabit transceivers, intended for use in
ultrahigh-speed bidirectional point-to-point data transmission systems. The TLK2701 supports an effective
serial interface speed of 1.6 Gbps to 2.7 Gbps, providing up to 2.16 Gbps of data bandwidth.
The primary application of this chip is to provide very 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.
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 current solutions, as well as scalability for higher data rate in the future.
The TLK2701 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 2.7 Gbps.
The transmitter latches 16-bit parallel data at a rate based on the supplied reference clock (GTX_CLK). The
16-bit parallel data is internally encoded into 20 bits using an 8-bit/10-bit (8B/10B) encoding format. The
resulting 20-bit word is then transmitted differentially at 20 times the reference clock (GTX_CLK) rate. The
receiver section performs the serial-to-parallel conversion on the input data, synchronizing the resulting 20-bit
wide parallel data to the extracted reference clock (RX_CLK). It then decodes the 20 bit wide data using
8-bit/10-bit decoding format resulting in 16 bits of parallel data at the receive data terminals (RXD0-15). The
outcome is an effective data payload of 1.28 Gbps to 2.16 Gbps (16 bits data x the GTX_CLK frequency).
The TLK2701 is housed in a high performance, thermally enhanced, 64-pin VQFP PowerPAD package. Use
of the PowerPAD package does not require any special considerations except to note that the PowerPAD, which
is an exposed die pad on the bottom of the device, is a metallic thermal and electrical conductor. It is
recommended that the TLK2701 PowerPAD be soldered to the thermal land on the board. All ac performance
specifications in this data sheet are measured with the PowerPAD soldered to the test board.
The TLK2701 provides an internal loopback capability for self-test purposes. Serial data from the serializer is
passed directly to the deserializer, allowing the protocol device a functional self-check of the physical interface.
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.
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  2002, Texas Instruments Incorporated
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