VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7937
Features
• Typical Rise Times of 100ps • High-Speed O...
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7937
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
Single Supply 2.5Gb/s Voltage Driver
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
INOUT
DIN 50 Ω** DINTERM* 50 Ω** NDIN
D Q
M U X
IBIAS1 IMOD
IBIAS2 VIP
CLK 50 Ω** CLKTERM* NCLK MIB2 SEL SEL MIP MIB1 50 Ω** VIB2 VIB1
*Terminated to Off-chip Capacitor **On Die Components
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:
[email protected] Internet: www.vitesse.com
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VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
Single Supply 2.5Gb/s Voltage Driver
VSC7937
Electrical Characteristics
Table 1: High-Speed I...