VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
2.488Gb/s SONET/SDH
STS-48/STM-16 Section Terminator
VSC8151
Table 18: Pin Identification
Signal
Pin
I/O
Level
Pin Description
VEE
VCC
71
72
PWR
GND
+3.3V
TTL
−
PWR
I_RCVCO
NC
73
Ι
−
TTL Reference Input (Set with MXC[1:0])
74
Leave Unconnected
I_RCAIS
NC
75
Ι
PECL
−
PECL Reference Input (Set with MXC[1:0])
Leave Unconnected
76
−
NC
77
−
−
Leave Unconnected
NC
78
−
−
Leave Unconnected
NC
79
−
−
Leave Unconnected
NC
80
−
−
Leave Unconnected
LOS
81
I
TTL
+3.3V
GND
+2.0V
+3.3V
GND
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
GND
TTL
TTL
+3.3V
TTL
TTL
−
Loss of Signal
VCC
82
PWR
PWR
PWR
PWR
PWR
O
VEE
83
VMM
84
VCC
85
VEE
86
RXFRERR
TXFPOUT
RXOHOUT4
RXOHOUT5
RXOHOUT6
RXOHOUT7
RXOHOUT0
RXOHOUT1
VEE
87
Received Frame Error
Transmit Frame Pointer
Received Overhead Bus
Received Overhead Bus
Received Overhead Bus
Received Overhead Bus
Received Overhead Bus
Received Overhead Bus
88
O
89
O
90
O
91
O
92
O
93
O
94
O
95
PWR
O
RXOHOUT2
RXOHOUT3
VCC
96
Received Overhead Bus
Received Overhead Bus
97
O
98
PWR
O
LOF
99
Loss of Frame
CKREFT
NC
100
101
102
103
104
105
106
107
108
O
Output Clock for external AIS CMU (Set with MXC[1:0])
Leave Unconnected
−
TXPOUT15
VCC
O
PECL
+3.3V
PECL
PECL
+3.3V
PECL
−
16 bit PECL output bus
PWR
O
TXPOUT14
TXPOUT13
VCC
16 bit PECL output bus
16 bit PECL output bus
O
PWR
O
TXPOUT12
NC
16 bit PECL output bus
Leave Unconnected
−
G52225-0, Rev. 2.3
8/16/99
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 23
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