VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
2.488Gb/s SONET/SDH
STS-48/STM-16 Section Terminator
VSC8151
Package Pin Descriptions
Table 18: Pin Identification
Signal
Pin
I/O
Level
Pin Description
VREF
VCC
1
2
3
4
5
6
7
PWR
PWR
PWR
PWR
−
+1.98V
+3.3V
GND
+2.0V
−
ECL Input reference. No connect if RXPIN[15:0] is not used.
VEE
VMM
NC
Leave Unconnected
CKREFP
CKREFN
Ο
PECL
PECL
Output Clock for external AIS CMU (true)
Output Clock for external AIS CMU (complement)
Ο
VTERM
(RXSCLKIN)
8
Ι
0 -> 3.3V
High Speed Clock Input Termination Voltage (Demux)
VCC
VCC
9
PWR
PWR
PWR
PWR
PWR
O
+3.3V
+3.3V
GND
10
11
12
13
14
15
16
VEE
VEE
GND
VCC
+3.3V
HSECL
+3.3V
HSECL
TXSOUT -
VCC
Serial Data Output (Differential)
2.5Gb/s PECL Output Driver Supply Pin
Serial Data Output (Differential)
PWR
O
TXSOUT +
GND /
+3.3V
Serial data output power down (tie to VCC to power down, GND
otherwise)
DOPWR
17
Ι
VCC
18
19
20
21
PWR
Ο
+3.3V
HSECL
HSECL
+3.3V
2.5Gb/s PECL Output Driver Supply Pin
Serial Clock Output, true
TXSCLKOUT-
TXSCLKOUT+
VCC
Ο
Serial Clock Output, complementary
PWR
GND /
+3.3V
Serial clock output power down (tie to VCC to power down, GND
otherwise)
CLKOPWR
22
Ι
VCC
23
24
25
26
27
28
29
30
PWR
+3.3V
HSECL
HSECL
GND
−
2.5Gb/s PECL Output Driver Supply Pin
Serial Clock Input for Demux, true
RXSCLKIN +
RXSCLKIN -
VEE
I
I
Serial Clock Input For Demux, complement
PWR
TXSCLKIN-
TXSCLKIN+
RXSIN +
−
−
I
Serial Clock Input for Mux, complement
Serial Clock Input for Mux, true
Serial Data Input (Differential)
Serial Data Input (Differential)
−
HSECL
HSECL
RXSIN -
I
VTERM
(TXSCLKIN)
31
32
Ι
Ι
0 -> 3.3V
0 -> 3.3V
High Speed Clock Input Termination Voltage (for Mux)
High Speed Data Input Termination Voltage
VTERM
(RXSIN)
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 21
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