VITESSE

SEMICONDUCTOR CORPORATION

Data Sheet

VSC830

2.7Gb/s Asynchronous

Dual 2x2 Crosspoint Switch

2.7Gb/s Asynchronous

Page 8

G52192-0, Rev 4.0

05/23/01

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

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

Internet: www.vitesse.com

Table 10: Pin Identification

Signal Name

Pin(s)

Function

Description

1, 5, 7, 11, 12,

16, 28, 40, 44

Positive Supply

Global supply for chip

34, 35

Negative Supply

For channel output 1A. Must always be powered on.

32, 33

Negative Supply

For output 2A. Connect to VCC to power-off.

23, 24

Negative Supply

For output 1B. Connect to VCC to power-off.

21, 22

Negative Supply

For output 2B. Connect to VCC to power-off.

38

Positive Supply

Output driver supply for channel 1A

29

Positive Supply

Output driver supply for channel 2A

27

Positive Supply

Output driver supply for channel 1B

18

Positive Supply

Output driver supply for channel 2B

TERM_ENABLE_A

39

Termination Enable

Input termination enable for the “A” switch.

Normally low (VEE). Connect to VCC to enable

internal 100 ohm termination between AxA+ inputs.

TERM_ENABLE_B

17

Termination Enable

Input termination enable for the “B” switch.

Normally low (VEE). Connect to VCC to enable

internal 100

Ω termination between AxA+ inputs.

PEMODE

6

Control

PECL/TTL interface control

A1A±

41, 42

PECL Input

Channel 1A differential signal input

S1A

43

PECL/TTL Input

Channel 1A input selector

Y1A±

37, 36

PECL Output

Channel 1A differential output

A2A±

3, 4

PECL Input

Channel 2A differential signal input

S2A

2

PECL/TTL Input

Channel 2A input selector

Y2A±

31, 30

PECL Output

Channel 2A differential output

A1B±

8, 9

PECL Input

Channel 1B differential signal input

S1B

10

PECL/TTL Input

Channel 1B input selector

Y1B±

26, 25

PECL Output

Channel 1B differential output

A2B±

14, 15

PECL Input

Channel 2B differential signal input

S2B

13

PECL/TTL Input

Channel 2B input selector

Y2B±

20, 19

PECL Output

Channel 2B differential output