VITESSE
SEMICONDUCTOR CORPORATION
Datasheet
2.488 Gb/s ATM/SDH/SONET STM-16/STS-48
Mux/Demux and Section Terminator IC Chipset
VSC8025/VSC8026
Table 16: Pin Identification Table
Signal
Pin
I/O
Level
Pin Description
RXCLKOUTC
N/C
D16
E01
E02
E03
E04
E13
E14
E15
E16
O
TTL
Receive parallel data clockout C
No connection (leave open)
Serial loop back data out
Ground
RXSLBOUT+
VCC
O
HSECL
GND
+3.3V
+3.3V
GND
TTL
PWR
PWR
PWR
PWR
O
VTTL
+3.3V power supply
+3.3V power supply
Ground
VTTL
VCC
RXOUTD7
RXOUTD6
Parallel output bus data D
Parallel output bus data D
O
TTL
Serial receive clock termination. If AC coupling, connect
to GND with a decoupling capacitor. If DC coupling,
connect to Vtt directly.
RXCLKREF
F01
N/C
RXSLBOUT-
VTT
F02
F03
F04
F13
F14
F15
F16
No connection (leave open)
Serial loop back data out
-2.0V power supply
O
PWR
PWR
O
HSECL
-2V
VTT
-2V
-2.0V power supply
RXOUTD3
RXOUTD5
RXOUTD4
TTL
TTL
TTL
Parallel output bus data D
Parallel output bus data D
Parallel output bus data D
O
O
Serial receive data termination. If AC coupling, connect
to GND with a decoupling capacitor. If DC coupling,
connect to Vtt directly.
RXSREF
G01
VCC
VTTL
G02
G03
G04
G13
G14
G15
G16
H01
H02
H03
H04
H13
H14
H15
H16
J01
PWR
PWR
PWR
PWR
PWR
PWR
O
GND
+3.3V
GND
GND
+3.3V
GND
TTL
Ground
+3.3V power supply
Ground
VCC
VCC
Ground
VTTL
+3.3V power supply
Ground
VCC
RXOUTD2
RXSCLKIN-
RXSCLKIN+
VCC
Parallel output bus data D
Serial receive clock
Serial receive clock
Ground
I
HSECL
HSECL
GND
-2V
I
PWR
PWR
PWR
PWR
O
VTT
-2.0V power supply
-2.0V power supply
Ground
VTT
-2V
VCC
GND
TTL
RXOUTD1
RXOUTD0
RXSIN+
RXSIN-
Parallel output bus data D
Parallel output bus data D
Serial receive data
Serial receive data
O
TTL
I
HSECL
HSECL
J02
I
G52182-0, Rev. 4.0
1/5/00
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 29
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