VSC7937 Datasheet, PDF (1/14 Pages) Vitesse Semiconductor Corporation – Single Supply 2.5Gb/s Voltage Driver

VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7937
Single Supply 2.5Gb/s Voltage Driver
Features
• Typical Rise Times of 100ps
• High-Speed Operation
(Up to 2.5Gb/s NRZ Data)
• 3V Output Voltage Compliance
• Single-Ended or Differential Input Operation
• Single Power Supply: +5V or -5.2V
• Direct Access to Modulation and Bias FETs
• On-Die MUX for Clocked or Unclocked
Applications
• On-Chip 50Ω Input Clock and Data Termination
Applications
• SONET/SDH @ 622Mb/s, 1.244Gb/s, 2.488Gb/s
• Full-Speed Fibre Channel (1.062Gb/s)
General Description
The VSC7937 is a single -5.2V supply, 2.5Gb/s voltage driver with direct access to the output modulation
and bias FETs. The output stage can drive 60mA into 50Ω with adequate output voltage compliance. Output
bias and modulation currents are set by external components allowing precision monitoring and setting of the
output voltage levels.
VSC7937 Block Diagram
NOUT OUT
I_NOUT
DIN
DINTERM*
NDIN
CLK
CLKTERM*
NCLK
50 Ω^**
50 Ω^**
50 Ω^**
50 Ω^**
*Terminated to Off-chip Capacitor
**On Die Components
M
DQ
U
X
VIP
VIB2
SELSEL
IBIAS2
IMOD
IBIAS1
MIB2
MIP
MIB1
VIB1
G52200-0, Rev 3.0
03/05/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: [phone] • Email: [e-mail]
Internet: www.vitesse.com
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