VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
2.48832Gb/s 16:1 SONET/SDH
Transceiver with Integrated Clock Generator
VSC8140
Table 4: Package Pin Identification - 128 PQFP
Pin #
Name
I/O
Level
GND typ. Negative power supply
Description
72
73
VEE
TXIN8
TXIN7
TXIN6
TXIN5
TXIN4
VCC
—
I
LVPECL
LVPECL
LVPECL
LVPECL
LVPECL
3.3V typ.
LVPECL
LVPECL
Low-speed single-ended data
Low-speed single-ended data
Low-speed single-ended data
Low-speed single-ended data
Low-speed single-ended data
Positive power supply
74
I
75
I
76
I
77
I
78
—
I
79
TXIN3
TXIN2
VEE
Low-speed single-ended data
Low-speed single-ended data
80
I
81
—
I
GND typ. Negative power supply
82
TXIN1
TXIN0
VCC
LVPECL
LVPECL
3.3V typ.
Voltage
Low-speed single-ended data
Low-speed single-ended data (LSB)(2)
83
I
84
—
I
Positive power supply
85
VREFIN
VREFOUT
VCC
Voltage reference for single-ended TXIN VCM or VREFOUT
Voltage reference for single-ended RXOUT (VOH+VOL)/2.
Positive power supply
86
O
—
O
O
—
O
O
—
O
O
—
O
O
—
O
O
—
—
O
O
O
—
O
Voltage
87
3.3V typ.
LVPECL
LVPECL
88
RXOUT0
RXOUT1
VEE
Low-speed single-ended data (LSB)(2)
89
Low-speed single-ended data
90
GND typ. Negative power supply
91
RXOUT2
RXOUT3
VCC
LVPECL
LVPECL
3.3V typ.
LVPECL
LVPECL
3.3V typ.
LVPECL
LVPECL
Low-speed single-ended data
Low-speed single-ended data
Positive power supply
92
93
94
RXOUT4
RXOUT5
VCC
Low-speed single-ended data
Low-speed single-ended data
Positive power supply
95
96
97
RXOUT6
RXOUT7
VEE
Low-speed single-ended data
Low-speed single-ended data
98
99
GND typ. Negative power supply
100
101
102
103
104
105
106
107
108
RXOUT8
RXOUT9
VCC
LVPECL
LVPECL
3.3V typ.
3.3V typ.
LVPECL
LVPECL
LVPECL
3.3V typ.
LVPECL
Low-speed single-ended data
Low-speed single-ended data
Positive power supply
VCC
Positive power supply
RXOUT10
RXOUT11
RXOUT12
VCC
Low-speed single-ended data
Low-speed single-ended data
Low-speed single-ended data
Positive power supply
RXOUT13
Low-speed single-ended data
G52251-0, Rev. 4.0
9/6/00
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 21
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