VITESSE

SEMICONDUCTOR CORPORATION

Advance Product Information

VSC7959

3.125Gb/s CML Limiting Amplifier with LOS Detect

Page 2

G52358-0, Rev 2.0

02/09/01

© 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: DC Specifications

NOTE: (1) See Figure 5 for supply current measurement setup.

Table 2: DC Specifications

NOTES: (1) Deterministic jitter measured peak-to-peak with K28.5 pattern. (2) Random jitter measured with minimum input.

Symbol

Parameter

Min

Typ

Max

Units

Conditions

Power Supply Voltage

3.135

5.5

V

31

mA

35

mA

38

mA

43

m

Α

Power Supply Current when

21

mA

25

mA

Power Supply Current when

24

mA

28

mA

Squelch Input Current

0

400

µA

PSSR

Power Supply Rejection Ratio

20

30

dB

f < 2MHz

Symbol

Parameter

Min

Typ

Max

Units

Conditions

Data Rate

3.125

Gb/s

Input Voltage Range

10

1200

mV

Peak-to-peak

Deterministic Jitter

25

ps

See Note 1

Random Jitter

8

ps

See Note 2, RMS

Rise and Fall Times

55

100

ps

20% to 80%

Input Referred Noise

230

µV

RMS, IN+ to IN-

Differential Input Resistance

100

Ω

IN+ to IN-

Low Frequency Cutoff

2MHz

2kHz

Output Signal When Squelched

20

mV

Output AC-coupled

CML Output Voltage

550

1200

mV

1100

1800

mV

20

mV

Squelched

Output Resistance

100

Ω

Single-ended