TLK6002 Datasheet, PDF (24/96 Pages) Texas Instruments – Dual Channel 0.47Gbps to 6.25Gbps Multi-Rate Transceiver

TLK6002
SLLSE34 – MAY 2010
www.ti.com
Data In
Sync Reset
Figure 2-6. 7-Degree Polynomial Scrambler
Data Out
2.10 Power Down Mode
The TLK6002 can be put in power down either through device input pins or through MDIO control register
(1.15). PD_TRXA_N: Active low, powers down channel A. PD_TRXB_N: Active low, powers down channel
B.
The MDIO management serial interface remains operational when in register based power down mode
(1.15 asserted for both channels), but status bits may not be valid since the clocks are disabled. The serial
outputs and parallel output interface signals are high impedance when in power down mode. See the
detailed per pin description for behavior of each device I/O signal during pin based and register based
power down.
2.11 Parallel to Serial (Transmit):
In the transmit direction, the device accepts parallel input data on the TDA_[19:0] and TDB_[19:0] input
pins and converts the data into an optionally scrambled 8b/10b encoded serial stream on the TXAP/N and
TXBP/N serial output pins.
2.12 Serial to Parallel (Receive)
Serial data is received on the RXAP/N and RXBP/N pins, and optionally descrambled and 8b/10b
decoded and converted to parallel output data pins RDA_[19:0] and RDB_[19:0]. The interpolator and
clock recovery circuit will lock to the data stream if the incoming serial rate is within ±200 PPM of the
reference clock for the channel. The recovered byte clock is used to retime and deserialize the input data
stream, and is always synchronous with the parallel output data.
2.13 High Speed CML Output
The high speed data output driver is implemented using Current Mode Logic (CML) with integrated pull up
resistors, requiring no external components. The transmit outputs must be AC coupled.
TXAP
TXAN
TRANSMITTER
50 W Transmission Line
50 W Transmission Line
MEDIA
RXAP
50 W
50 W
GND
0.8* VDDT
RXAN
RECEIVER
Figure 2-7. Example of High Speed I/O AC Coupled Mode (Channel A is shown).
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Description
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