VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Data Sheet

VSC7937

Single Supply 2.5Gb/s Voltage Driver

Page 2

G52200-0, Rev 3.0

03/05/01

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

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

Internet: www.vitesse.com

Electrical Characteristics

Table 1: High-Speed Inputs and ECL Outputs

Table 2: DC Characteristics

Symbol

Parameter

Min

Typ

Max

Units

Conditions

Single-Ended Input Voltage Swing

300

—

1500

mVp-p

Differential Input Common-Mode Range

-2.3

—

-1.3

V

ECL Output HIGH Voltage

-1200

——

mV

50

Ω to -2.0V

ECL Output LOW Voltage

——

-1600

mV

50

Ω to -2.0V

On-Chip Terminations

35

—

65

Ω

Maximum Peak Current

(1)

60

——

mA

VIP = VSS + 1.4V

VIB1 = -5.2V

VIB2 = -5.2V

DIN = LOW

Maximum Peak Current

——

4mA

VIP = -4.1V

VIB1 = -5.2V

VIB2 = -5.2V

DIN = HIGH

Rise and Fall Times

——

100

ps

20% to 80%

Output Voltage

——

-3.0

V

VIP = -4.1V

VIB1 = -5.2V

VIB2 = -5.2V

DIN = LOW

Set-up Time - Data to CLK

20

50

—

ps

Hold Time

—

50

90

ps

Symbol

Parameter

Min

Typ

Max

Units

Conditions

Power Supply Voltage

-5.5

-5.2

-4.75

V

Maximum Bias Current

30

——

mA

VIB1, 2 = VSS + 1.8V

VIP = -5.2V

Duty-Cycle Control Voltage

—

3V

V

HIGH Level Input Voltage

-1.15

-0.9

-0.8

V

LOW Level Input Voltage

—

-1.7

-1.45

V

VIB1, VIB2

BIAS Control Voltage

—

+1.8

V

VIP

Modulation Control Voltage

—

+1.4

V