SLK2511B
www.ti.com
SLLS763B–JANUARY 2007–REVISED MARCH 2007
DETAILED DESCRIPTION
The SLK2511B is designed to support OC-48/24/12. The operating data speed can be configured through the
RSEL0 and RSEL1 pins as indicated in Table 2.
Table 2. Data Rate Select
SERIAL DATA RATE
OC-48:2.488 Gb/s
RSEL0
RSEL1
PARALLEL LVDS DATA RATE
622.08 Mbps
TXCLK/RXCLK
622.08 MHz
311.04 MHz
155.52 MHz
38.88 MHz
0
1
0
1
0
0
1
1
OC-24:1.244 Gb/s
OC-12:622 Mb/s
OC-3:155 Mb/s
311.04 Mbps
155.52 Mbps
38.88 Mbp
The user can also enable the autorate detection circuitry through the AUTO_DETECT pin. The device
automatically detects the OC-N of the data line rate and generates two bits of output to indicate the data rate to
other devices in the system. When using AUTO_DETECT, RSEL0 and RSEL1 need to be set to 00 or be
unconnected.
Table 3. Data Rate Reporting Under Autorate Detection Mode
SERIAL DATA RATE
OC-48:2.488 Gb/s
OC-24:1.244 Gb/s
OC-12:622 Mb/s
RATEOUT0
RATEOUT1
PARALLEL LVDS DATA RATE
622.08 Mbps
TXCLK/RXCLK
622.08 MHz
311.04 MHz
155.52 MHz
38.88 MHz
0
1
0
1
0
0
1
1
311.04 Mbps
155.52 Mbps
OC-3:155 Mb/s
38.88 Mbp
The SLK2511B has four operational modes controlled by two configuration pins. These operational modes are
listed in Table 4. When the device is put in a certain mode, unused circuit blocks are powered down to conserve
the system power.a
While the transceiver mode, transmit only mode, and receive only mode are straightforward, the repeater mode
of operation is shown in Figure 4. The receive serial data is recovered by the extracted clock and it is then sent
back out on the transmit serial outputs. The data eye is open both vertically and horizontally in this process. In
the repeater mode, the user can select to turn on the RX demux function through the RX_MONITOR pin and
allow the parallel data to be presented. This feature enables the repeater device not only to repeat but also to
listen in.
Table 4. Operational Modes
MODE
CONFIG0
CONFIG1
DESCRIPTION
Full duplex transceiver mode
1
2
3
4
0
0
1
1
0
1
0
1
Transmit only mode
Receive only mode
Repeater mode
6
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