TLK4015 Datasheet, PDF (1/24 Pages) Texas Instruments – QUAD 0.6 TO 1.5 Gbps TRANSCEIVER

TLK4015
QUAD 0.6 to 1.5 Gbps TRANSCEIVER
D Hot Plug Protection
D Quad 0.6 to 1.5 Gigabits Per Second (Gbps)
Serializer/Deserializer
D Independent Channel Operation
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 Rated for Industrial Temperature Range
D On-Chip 8-Bit/10-Bit (8b/10b)
Encoding/Decoding, Comma Alignment,
and Link Synchronization
SLLS541 – DECEMBER 2002
D On-Chip PLL Provides Clock Synthesis
From Low-Speed Reference
D Receiver Differential Input Thresholds
200 mV Minimum
D Typical Power: 1 W
D Loss-of-Signal (LOS) Detection
D Ideal for High-Speed Backplane
Interconnect and Point-to-Point Data Link
D Small Footprint 19×19-mm 289-Ball PBGA
Package
description
The TLK4015 is a four-channel multigigabit transceiver used in ultrahigh-speed bidirectional point-to-point data
transmission systems. The four channels in the TLK4015 are configured as four separate links. The TLK4015
supports an effective serial interface speed of 0.6 Gbps to 1.5 Gbps per channel, providing up to 1.2 Gbps of
data bandwidth per channel.
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 from 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. 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 rates in the future.
The TLK4015 performs parallel-to-serial and serial-to-parallel data conversion. The clock extraction functions
as a physical layer interface device. The serial transceiver interface operates at a maximum speed of 1.5 Gbps.
Each 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 RDx[0–15]). The outcome is
an effective data payload of 480 Mbps to 1.2 Gbps (16 bits data × the GTx_CLK frequency) per channel.
The TLK4015 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.
The TLK4015 is designed to be hot-plug capable. An on-chip power-on reset circuit holds the Rx_CLK low
during power up. This circuit also holds the parallel side output signal terminals as well as DOUTTxP and
DOUTTxN in a high-impedance state during power up.
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.
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.
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Copyright  2002, Texas Instruments Incorporated
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