PORT BYPASS CIRCUIT FOR FIBRE CHANNEL AND GIGABIT ETHERNET
S2057
Table 2. Pin Assignment and Descriptions
Pin Name
Level
I/O
Pin#
7, 6
4, 3
Description
INP
INN
Diff.
LVPECL
I
I
Differential inputs from the downstream PBC port.
DDIP
DDIN
Diff.
LVPECL
Disk Drive Input. Serial input from the local transmitter on PBC
port 1.
A Low selects the "BYPASS" mode causing the output of the
previous port to propagate to the next port or OUT. When High,
this signal selects "NORMAL" mode which routes the previous
port to the local output, DDO and routes the local input, DDI to
the next port or OUT.
SEL
TTL
I
11
DDOP
DDON
Diff.
LVPECL
Disk Drive Output. Serial output driving the local receiver
corresponding to PBC port 1.
O
O
19, 18
15, 14
OUTP
OUTN
Diff.
LVPECL
Serial output driving the upstream PBC port.
Power Supply. 3.3V nominal.
1, 2, 10,
12, 17, 20
VCC
GND
+3.3V
GND
Ground. Ground pins are phyisically attached to the die
mounting surface, and are an important part of the thermal path.
For best thermal performance, all ground pins should be
connected to a ground plane, using multiple vias if possible.
5, 8, 9,
13, 16
4
August 8, 2000 / Revision C
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
