VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
ATM/SONET/SDH 622/155Mb/s Transceiver
Mux/Demux with Integrated Clock Generation
VSC8116
Signal
Pin
I/O
Level
Pin Description
N/C
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
-
O
I
-
No connection
C1P
ANALOG CMU external capacitor (see Figure 6, and Table 1)
ANALOG CMU external capacitor (see Figure 6, and Table 1)
ANALOG CMU external capacitor (see Figure 6, and Table 1)
ANALOG CMU external capacitor (see Figure 6, and Table 1)
C1N
C2N
C2P
I
O
P
P
P
P
P
P
O
I
VDDA
VSSA
VSS
+3.3V
GND
GND
GND
+3.3V
+3.3V
TTL
TTL
TTL
GND
TTL
TTL
TTL
TTL
TTL
TTL
TTL
-
Analog Power Supply (CRU)
Analog Ground (CRU)
Ground
VSS
Ground
VDD
VDD
+3.3V Power Supply
+3.3V Power Supply
Transmit byte clock out
Transmit input data bit7
Transmit input data bit6
Ground
TXLSCKOUT
TXIN7
TXIN6
VSS
I
P
I
TXIN5
TXIN4
TXIN3
TXIN2
TXIN1
TXIN0
STS12
N/C
Transmit input data bit5
Transmit input data bit4
Transmit input data bit3
Transmit input data bit2
Transmit input data bit1
Transmit input data bit0
155Mb/s or 622Mb/s mode select, refer to table 2
No connection
I
I
I
I
I
I
-
VDD
P
+3.3V
+3.3V Power Supply
Equipment loopback, loops low speed byte wide transmit input
data to receive output bus
EQULOOP
62
I
TTL
Facility loopback, loops high speed receive data and clock
directly to transmit outputs.
FACLOOP
N/C
63
64
I
-
TTL
-
No connection
Page 14
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
G52220-0, Rev 4.1
1/8/00
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
