TRx I/ O Definition (Cont’d.)
Name
Pin Type
Signal
RX[0]
RX[1]
RX[2]
RX[3]
RX[4]
RX[5]
RX[6]
RX[7]
RX[8]
RX[9]
45
44
43
41
40
39
38
36
35
34
O-TTL
Data Outputs: One 10 bit data byte. RX[0] is the first bit received. RX[0] is the least
significant bit. When there is a loss of input signal at DINB and RXSEL is high, these
outputs are held static at logic 1. Refer to SIG_DET (pin 26) pin definition for more
details.
RXCAP0
RXCAP1
48
49
C
Loop Filter Capacitor: A loop filter capacitor for the internal PLL must be connected
across the RXCAP0 and RXCAP1 pins. (typical value = 0.1 μF)
TX[0]
TX[1]
TX[2]
TX[3]
TX[4]
TX[5]
TX[6]
TX[7]
TX[8]
TX[9]
2
3
4
5
6
7
8
9
I-TTL
Data Inputs: One 10 bit, 8B/10B encoded data byte. TX[0] is the first bit transmitted. TX[0] is
the least significant bit.
10
11
TXCAP0
TXCAP1
17
16
C
Loop Filter Capacitor: A loop filter capacitor must be connected across the TXCAP1 and
pins (typical value=0.1 μF).
SIG_DET
26
O-TTL
Signal Detect: Indicates a loss of signal on the high-speed differential inputs, DINB, as in
the case where the transmission cable becomes disconnected.
If DIN>=200 mV peak-to-peak, SIG_DET=logic 1.
If DIN<200 mV and DIN>50 mV, SIG_DET=undefined.
If DIN<=50 mV, SIG_DET=logic 0.
V _RX
28
58
S
S
S
S
Logic Power Supply: Normally 3.3 volts. Used for internal receiver PECL logic. It should
be isolated from the noisy TTL supply as well as possible.
CC
V _RXA
CC
50
Analog Power Supply: Normally 3.3 volts. Used to provide a clean supply line for the PLL
and high speed analog cells.
V _RXHS
CC
54
High Speed Supply: Normally 3.3 volts. Used only for the high speed receiver cell
(HS_IN). Noise on this line should be minimized for best operation.
V _RXTTL 29
CC
TTL Power Supply: Normally 3.3 volts. Used for all TTL receiver output buffer cells.
37
42
V _TX
20
S
S
S
Logic Power Supply: Normally 3.3 volts. Used for internal transmitter PECL logic. Also
used for all transmitter TTL input buffer cells.
CC
V _TXA
CC
18
Analog Power Supply: Normally 3.3 volts. Used to provide a clean supply line for the PLL and
high speed analog cells.
V _TXECL 61
CC
High Speed ECL Supply: Normally 3.3 volts. Used only for the last stage of the high speed
transmitter output cell (HS_OUT) as shown in Figure 10. Due to high current transi-tions, this
V
CC
should be well bypassed to a ground plane.
V _TXHS
CC
64
S
High Speed Supply: Normally 3.3 volts. Used by the transmitter side for the high speed
circuitry. Noise on this line should be minimized for best operation.
14
PMC-Sierra, Inc. - Not Recommended for New Designs
PMC [ PMC-SIERRA, INC ]
