Data Sheet

VSC8122

Multi-Rate SONET/SDH

Clock and Data Recovery IC

VITESSE

SEMICONDUCTOR CORPORATION

Page 10

G52228-0, Rev 4.1

01/05/01

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

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

Internet: www.vitesse.com

NOTE:

(1) No connect (NC) pins must be left unconnected, or floating. Connecting any of these pins to either the positive or neg-

ative power supply rails may cause improper operation or failure of the device, or in extreme cases, cause permanent

damage to the device.

35

VCC

I

+3.3V typ.

Positive power supply

36

VEE

I

GND typ.

Negative power supply

37

VCC

I

+3.3V typ.

Positive power supply

38

DO-

O

HS

High-speed data output, complement.

39

DO+

O

HS

High-speed data output, true

40

VCC

I

+3.3V typ.

Positive power supply

41

VEE

I

GND typ.

Negative power supply

42

VCC

I

+3.3V typ.

Positive power supply

43

VEE

I

GND typ.

Negative power supply

44

REFCK1-

I

LVPECL

Reference clock 1 input, complement

45

REFCK1+

I

LVPECL

Reference clock 1 input, true

46

REFCK0-

I

LCPECL

Reference clock 0 input, complement

47

REFCK0+

I

LVPECL

Reference clock 0 input, true

48

VEE

I

GND typ.

GND power supply

49

VCC

I

+3.3V typ.

Positive power supply

50

REF_SEL[0]

I

—

Reference clock rate select pin 0

51

REF_SEL[1]

I

—

Reference clock rate select pin 1

52

VCC

I

+3.3V typ.

Positive power supply

53

VEE

I

GND typ.

Negative power supply

54

VEE

I

GND typ.

Negative power supply

55

VCC

I

+3.3V typ.

Positive power supply

56

DI-

I

HS

High-speed data input, complement

57

DI+

I

HS

High-speed data input, true

58

VCC

I

+3.3V typ.

Positive power supply

59

VTERM

I

0V->3.3V

High-speed data input termination voltage (may be connected

to ground through a series AC-coupling capacitor)

60

VEE

I

GND typ.

Negative power supply

61

VCC

I

+3.3V typ.

Positive power supply

62

NC

——

No connect, leave unconnected

63

VCC

I

+3.3V typ.

Positive power supply

64

NC

——

Pin #

Name

I/O

Level

Description