VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Data Sheet

VSC7928

SONET/SDH 3.2Gb/s Laser Diode Driver

Page 6

G52246-0, Rev 3.0

04/05/01

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

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

Internet: www.vitesse.com

Figure 6: Control Signals VIP and VIB

Figure 7: Simplified Output Structure

30 mA

60 mA

I (MIB)

I (MIP)

VIP

VIB

VSS + 1.5 Volts (Typical)

VSS + 1.5 Volts (Typical)

Typical Bias Current v.s. Bias Voltage

Typical Modulation Current v.s. Modulation Voltage

X

X

X

X

X

X

NIOUT

IOUT

X

IBIAS

OUTPUT

DIFF

PAIR

VIB

MIB

MIP

VIP