VITESSE
SEMICONDUCTOR CORPORATION
Datasheet
2.488 Gb/s ATM/SDH/SONET STM-16/STS-48
VSC8025/VSC8026
Mux/Demux and Section Terminator IC Chipset
Table 9: Pin Identification Table
Signal
Pin
I/O
Level
Pin Description
N/C
VCC
C04
C05
C06
C07
C08
C09
C10
C11
C12
C13
C14
C15
C16
D01
D02
D03
D04
D05
D06
D07
D08
D09
D10
D11
D12
D13
D14
D15
D16
E01
E02
E03
E04
E13
E14
E15
E16
F01
No Connection (tie to 0V or leave open)
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
I
GND
-2V
Ground
VTT
-2.0V power supply
+3.3V power supply
-2.0V power supply
-2.0V power supply
+3.3 V power supply
-2.0V power supply
Ground
VTTL
VTT
+3.3V
-2V
VTT
-2V
VTTL
VTT
+3.3V
-2V
VCC
GND
TTL
TTL
TTL
GND
TTL
TXIND3
TXIND1
TXINC6
VCC
Parallel input bus data D
Parallel input bus data D
Parallel input bus data C
Ground
I
I
PWR
I
DISB1GEN
N/C
Disable B1 generation (active high)
No Connection (tie to 0V or leave open)
Ground
VGND
N/C
PWR
GND
No Connection (tie to 0V or leave open)
No Connection (tie to 0V or leave open)
Ground
N/C
VCC
PWR
PWR
PWR
PWR
PWR
PWR
I
GND
GND
GND
GND
GND
GND
TTL
VCC
Ground
VCC
Ground
VCC
Ground
VCC
Ground
VCC
Ground
TXIND2
TXIND0
VCC
Parallel input bus data D
Parallel input bus data D
Ground
I
TTL
PWR
I
GND
TTL
TXINC4
TXINC3
TXPCLKIN-
N/C
Parallel input bus data C
Parallel input bus data C
Transmit parallel clock in
No Connection (tie to 0V or leave open)
Ground
I
TTL
I
ECL
VCC
PWR
PWR
PWR
PWR
I
GND
+3.3V
+3.3V
GND
TTL
VTTL
VTTL
VCC
+3.3V power supply
+3.3V power supply
Ground
TXINC1
TXFPINC
N/C
Parallel input bus data C
Transmit frame pulse in (active high)
No Connection (tie to 0V or leave open)
I
TTL
Page 14
VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
G52182-0, Rev. 4.0
1/5/00
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
