HDMP-1636 Datasheet, PDF (13/15 Pages) Agilent(Hewlett-Packard) – Gigabit Ethernet Transceiver Chip

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 O-TTL Data Outputs: One 10 bit data byte. RX[0] is the first bit received.
44
RX[0] is the least significant bit.
43
41
40
39
38
36
35
34
RXCAP0
48
RXCAP1
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 I-TTL Data Inputs: One 10 bit, 8B/10B-encoded data byte. TX[0] is the first
3
bit transmitted. TX[0] is the least significant bit.
4
6
7
8
9
11
12
13
TXCAP1
16
TXCAP0
17
C Loop Filter Capacitor: A loop filter capacitor must be connected across
the TXCAP1 and TXCAP0 pins (typical value = 0.1 µF).
V_CC_RX
23
28
57
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.
V_CC_RXA
50
S Analog Power Supply: Normally 3.3 volts. Used to provide a clean
supply line for the PLL and high-speed analog cells.
V_CC_RXHS 53
55
S 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_CC_RXTTL 29
37
42
S TTL Power Supply: Normally 3.3 volts. Used for all TTL receiver output
buffer cells.
V_CC_TX
20
59
S Logic Power Supply: Normally 3.3 volts. Used for internal transmitter PECL
logic. It should be isolated from the noisy TTL supply as well as possible.
V_CC_TXA
18
S Analog Power Supply: Normally 3.3 volts. Used to provide a clean
supply line for the PLL and high-speed analog cells.
V_CC_TXECL 60
S 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 transitions, this V_CC should be well
bypassed to a ground plane.
V_CC_TXHS 63
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.
V_CC_TXTTL 5
10
S TTL Power Supply: Normally 3.3 volts. Used for all TTL
transmitter input buffer cells.
723