© VITESSE SEMICONDUCTOR CORPORATION

Page 9

11/9/99

741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896

VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Datasheet

VSC8166

2.488 Gbit/sec

1:16 SONET/SDH Demux with Clock Recovery

G52252-0, Rev. 3.0

Package Pin Descriptions

Table 3: Package Pin Identification

Pin #

Name

I/O

Level

Description

1NC

—

—

No connect, leave unconnected

2

NC

—

—

No connect, leave unconnected

3

CLKREF

I/O

0V or 1.3V

Reference clock input termination voltage. 1.3V for DC coupling,

otherwise 0V.

4

VCC

—

3.3V typ.

Positive power supply pin

5

VEE_CMU

—

GND typ.

Negative power supply for CMU

6

VEE_CMU

—

GND typ.

Negative power supply for CMU

7

VEE_CMU

—

GND typ.

Negative power supply for CMU

8

VCC_CMU

—

3.3V typ.

Positive power supply for CMU

9

REFCLK+

I

LVPECL

Reference clock input, true.

10

REFCLK-

I

LVPECL

Reference clock input, complement.

11

VCC_CMU

—

3.3V typ.

Positive power supply for CMU

12

VCC

—

3.3V typ.

Positive power supply pin

13

DI+

I

LVPECL

High speed data input, true

14

DI-

I

LVPECL

High speed data input, complement

15

VEE

—

GND typ.

Negative power supply pin

16

VEE

—

GND typ.

Negative power supply pin

17

VEE

—

GND typ.

Negative power supply pin

18

VCC

—

3.3V typ.

Positive power supply pin

19

HSDREF

I

0V or 1.3V

High speed data input termination voltage reference. 1.3V for DC

coupling, otherwise 0V.

20

NC

—

—

No connect, leave unconnected

21

VCC

—

3.3V typ.

Positive power supply pin

22

NC

—

—

No connect, leave unconnected

23

VCC

—

3.3V typ.

Positive power supply pin

24

VCC

—

3.3V typ.

Positive power supply pin

25

VCC

—

3.3V typ.

Positive power supply pin

26

VEE

—

GND typ.

Negative power supply pin

27

VEE

—

GND typ.

Negative power supply pin

28

VEE

—

GND typ.

Negative power supply pin

29

VEE

—

GND typ.

Negative power supply pin

30

VEE

—

GND typ.

Negative power supply pin

31

NC

—

—

No connect, leave unconnected

32

NC

—

—

No connect, leave unconnected

33

NC

—

—

No connect, leave unconnected

34

NC

—

—

No connect, leave unconnected