VITESSE

SEMICONDUCTOR CORPORATION

G52293-0, Rev 2.3

Page 5

05/07/01

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

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

Internet: www.vitesse.com

Advance Product Information

VSC7124

Quad Port Bypass Circuit

Package Pin Descriptions

Figure 3: Pin Diagram

Table 1: Pin Identifications

Pin #

Name

Description

4, 3, 41, 40

35, 34, 28, 27

10, 9

I1+, I1-, I2+, I2-

I3+, I3-, I4+, I4-

I0+, I 0-

Ix+/Ix- is the serial input to PBCx.

15, 16,

17, 18

14

SEL1, SEL2

SEL3, SEL4

SEL0

INPUT - TTL

Port Bypass Mux SELect lines. A HIGH selects Ix. A LOW selects the

output of the previous internal device.

7, 6, 44, 43

38, 37, 31, 30

24, 25

O1+, O1-, O2+, O2-

O3+, O3-, O4+, O4-

O0+, O0-

OUTPUT - Differential

Ox+/Ox- is the serial output from PBCx.

2, 21, 32

VDD

Digital Logic Power Supply.

5

42

36

29

26

VDDP1

VDDP2

VDDP3

VDDP4

VDDP0

Power Supply (3.3V) for O1+/-. If unused, connect to VSS.

Power Supply (3.3V) for O2+/-. If unused, connect to VSS.

Power Supply (3.3V) for O3+/-. If unused, connect to VSS.

Power Supply (3.3V) for O4+/-. If unused, connect to VSS.

Power Supply (3.3V) for O0+/-. If unused, connect to VSS

12, 13, 20, 22, 23

N/C

Not Connected

1, 8, 11, 19, 33, 39

VSS

Ground

VSS

I0+

VSS

N/C

O0+

O4+

O0-

VDDP1

O1-

O1+

I4-

VDD

VSS

I0-

VDDP0

I4+

VDDP4

O4-

VDD

I1+

I1-

VSC7124

VSS

1

3

5

7

9

11

33

31

29

27

25

23

13

15

17

19

21

43

41

39

37

35