VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
2.5Gb/s SONET-Compatible
8-Bit MUX/DEMUX Chipset
VSC8021/VSC8022
Table 7: VSC8021 Pin Identifications
Pin #
Signal Name
I/O
Level Type
Description
Parallel Data Bit 7, Complement
1
2
3
4
5
6
D7N
D8
I
ECL
ECL
ECL
0V
I
I
Parallel Data Bit 8, True
Parallel Data Bit 8, Complement
Ground
D8N
VCC
NC
Pwr
No Connection
RCLKN
O
Pwr
O
ECL
-2.0V
ECL
Independent CLK Divide-by-8 Clock, Complement
Power Supply for Internal Reference Generation and Low Power
Logic
7
VTT
8
RCLK
NC
Independent CLK Divide-by-8 Clock, True
No Connection
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
VCC
NC
Pwr
0V
Ground
No Connection
NC
No Connection
NC
No Connection
NC
No Connection
NC
No Connection
NC
No Connection
CLKI
VCC
CLKIN
CON
CO
I
Pwr
I
HS
0V
High-Speed Clock, True
Ground
HS
High-Speed Clock, Complement
High-Speed Clock, Complement
High-Speed Clock, True
High-Speed Serial Data Output, True
Power Supply for High-Speed Logic
High-Speed Data, Complement
No Connection
O
HS
O
HS
DO
O
HS
VEE(1)
DON
NC
Pwr
O
-5.2V
OHS
NC
No Connection
NC
No Connection
SYNC
ERR
VCC
CLK8N
CLK8
I
O
ECL
ECL
0V
Error Correction
Error Detection
Pwr
O
Ground
ECL
ECL
Phase-Adjustable CLK Divide-by-8 Clock, Complement
Phase-Adjustable CLK Divide-by-8 Clock, True
O
G52028-0, Rev 4.1
05/25/01
Page 11
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