VSC7104
Datasheet
Downloaded by pm_virendrakumar@yahoo.com on July 3, 2007 from Vitesse.com
6.5 Gbps Quad Signal Conditioner
Features
• 6.5 Gigabit per second (Gbps) Non-Return-to-Zero
(NRZ) data bandwidth
• User-programmable input signal equalization
• User-programmable output pre-emphasis
• 2.5 V or 3.3 V CMOS/TTL control inputs
• Differential Common-Mode Logic (CML) data
output driver
• On-chip input and output terminations
• Single 2.5 V power supply, 3.3 V optional control
pins
• 900 mW typical power
• High-performance 69-pin CBGA package
Applications
• Wideband signal clean-up device
• Line driver or receiver
• Backplane driver or receiver
• Cable driver or receiver
General Description
The VSC7104 is a quad signal conditioner designed for use in broadband data stream applications. It features an
asynchronous design that allows the user to use it in applications calling for the simultaneous transmission of different
data rates (up to 6.5 Gbps) on different signal channels. A high degree of signal integrity is provided because of the
device’s use of fully differential signal paths.
Each of the inputs on the VSC7104 connects directly to one of its corresponding outputs. All signal paths are unregistered
and fully asynchronous; there are no restrictions on the phase, frequency, or signal pattern of any input.
Data inputs are terminated on-die using 100 ohm resistors between true and complement with a common connection to an
internal bias source for AC-coupling. Each high-speed output also incorporates on-die terminations to provide maximum
signal integrity.
The device also features Vitesse’s innovative programmable Input Signal Equalization (ISE). This allows the user to
compensate for varying trace lengths on the printed circuit board by enabling a discrete implementing any of three,
discrete levels of conditioning. Similar compensation is available for outputs using a user-set pre-emphasis of the output.
Pre-emphasis adds a fixed overshoot or undershoot to the output waveform.
VMDS-10059 Revision 4.2
February 27, 2007
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SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • E-mail: webmaster@vitesse.com
Internet: www.vitesse.com
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