VITESSE

SEMICONDUCTOR CORPORATION

G52028-0, Rev 4.1

Page 11

05/25/01

© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012

Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com

Internet: www.vitesse.com

Data Sheet

VSC8021/VSC8022

8-Bit MUX/DEMUX Chipset

2.5Gb/s SONET-Compatible

Table 7: VSC8021 Pin Identifications

Pin #

Signal Name

I/O

Level Type

Description

1

D7N

I

ECL

Parallel Data Bit 7, Complement

2

D8

I

ECL

Parallel Data Bit 8, True

3

D8N

I

ECL

Parallel Data Bit 8, Complement

4VCC

Pwr

0V

Ground

5

NC

No Connection

6

RCLKN

O

ECL

Independent CLK Divide-by-8 Clock, Complement

7VTT

Pwr

-2.0V

Power Supply for Internal Reference Generation and Low Power

Logic

8

RCLK

O

ECL

Independent CLK Divide-by-8 Clock, True

9

NC

No Connection

10

VCC

Pwr

0V

Ground

11

NC

No Connection

12

NC

No Connection

13

NC

No Connection

14

NC

No Connection

15

NC

No Connection

16

NC

No Connection

17

CLKI

I

HS

High-Speed Clock, True

18

VCC

Pwr

0V

Ground

19

CLKIN

I

HS

High-Speed Clock, Complement

20

CON

O

HS

High-Speed Clock, Complement

21

CO

O

HS

High-Speed Clock, True

22

DO

O

HS

High-Speed Serial Data Output, True

23

Pwr

-5.2V

Power Supply for High-Speed Logic

24

DON

O

OHS

High-Speed Data, Complement

25

NC

No Connection

26

NC

No Connection

27

NC

No Connection

28

SYNC

I

ECL

Error Correction

29

ERR

O

ECL

Error Detection

30

VCC

Pwr

0V

Ground

31

CLK8N

O

ECL

Phase-Adjustable CLK Divide-by-8 Clock, Complement

32

CLK8

O

ECL

Phase-Adjustable CLK Divide-by-8 Clock, True