TLK2208B Datasheet, PDF (8/40 Pages) Texas Instruments – 8-PORT GIGABIT ETHERNET TRANCSEIVER

TLK2208B
8ĆPORT GIGABIT ETHERNET TRANSCEIVER
SLLS578D − AUGUST 2003 − REVISED SEPTEMBER 2006
SIGNAL
RDBA9
RDDC[7:0]
RDDC8
RDDC9
RDFE[7:0]
RDFE8
LOCATION
P2
P3, R3, T2,
U2, U1, T1,
R2, R1
U3
T3
T7, U7, T6,
U6, T5, U5,
T4, U4
U8
TYPE
DESCRIPTION
LVCMOS
output
Receive data 9, channels A and B. The parallel data is clocked out of the transceiver on the rising and
falling edges of the receive clock. In multiplexed channel mode, when CODE = low, this terminal is the
10th bit of a 10-bit word received.
In nibble interface mode, when CODE = low, this terminal is the 5th and 10th bits of a 10-bit word received
on channel B.
This terminal is internally series-terminated-to provide direct connection to a 50-Ω transmission line.
LVCMOS Receive data channels C and D. The parallel data is clocked out of the transceiver on the rising and
output falling edges of the receive clock.
In multiplexed channel mode, data for channel D is aligned to the rising edge of RCLK and data for
channel C is aligned to the falling edge of RCLK (see Figure 6 for clarity).
In nibble mode, data is output least-significant nibble first, aligned to the falling edge of the receive clock,
followed by the most-significant nibble aligned to the rising edge. Channel C is output on RDDC[4:0]
and channel D is output on RDDC[9:5]. When CODE = high, RDDC3 acts as the K-flag bit for channel
C on the rising edge of RCLK.
These terminals are internally series-terminated to provide direct connection to a 50-Ω transmission
line.
LVCMOS
output
Receive data/K-flag, channels C and D. The parallel data is clocked out of the transceiver on the rising
and falling edges of the receive clock.
In multiplexed channel mode, when CODE = low, this terminal is the 9th bit of a 10-bit word received.
When CODE = high, this terminal acts as the K-flag bit. When RDDC8 = high, this terminal indicates
that the data on RDDC[7:0] is a K-character.
In nibble interface mode, when CODE = low, this terminal is the 4th and 9th bits of a 10-bit word received
on channel D. When CODE = high, this terminal acts as the 4th bit on the falling edge and as the K-flag
bit on the rising edge for channel D. When RDDC8 = high, this terminal indicates that the data on
RDDC[7:0], output on the rising and falling edges of the receive clock, is a K-character.
This terminal is internally series-terminated to provide direct connection to a 50-Ω transmission line.
LVCMOS
output
Receive data 9, channels C and D. The parallel data is clocked out of the transceiver on the rising and
falling edges of the receive clock. In multiplexed channel mode, when CODE = low, this terminal is the
10th bit of a 10-bit word received.
In nibble interface mode, when CODE = low, this terminal is the 5th and 10th bits of a 10-bit word received
on channel D.
This terminal is internally series-terminated to provide direct connection to a 50-Ω transmission line.
LVCMOS Receive data channels E and F. The parallel data is clocked out of the transceiver on the rising and
output falling edges of the receive clock.
In multiplexed channel mode, data for channel F is aligned to the rising edge of RCLK and data for
channel E is aligned to the falling edge of RCLK (see Figure 6 for clarity).
In nibble mode, data is output least-significant nibble first, aligned to the falling edge of the receive clock,
followed by the most-significant nibble aligned to the rising edge. Channel E is output on RDFE[4:0] and
channel F is output on RDFE[9:5]. When CODE = high, RDFE3 acts as the K-flag bit for channel E on
the rising edge of RCLK.
These terminals are internally series-terminated to provide direct connection to a 50-Ω transmission
line.
LVCMOS
output
Receive data/K-flag, channels E and F. The parallel data is clocked out of the transceiver on the rising
and falling edges of the receive clock.
In multiplexed channel mode, when CODE = low, this terminal is the 9th bit of a 10-bit word received.
When CODE = high, this terminal acts as the K-flag bit. When RDFE8 = high, this terminal indicates
that the data on RDFE[7:0] is a K-character.
In nibble interface mode, when CODE = low, this terminal is the 4th and 9th bits of a 10-bit word received
on channel F. When CODE = high, this terminal acts as the 4th bit on the falling edge and as the K-flag
bit on the rising edge for channel F. When RDFE8 = high, this terminal indicates that the data on
RDFE[7:0], output on the rising and falling edges of the receive clock, is a K-character.
This terminal is internally series terminated to provide direct connection to a 50-Ω transmission line.
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