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Vitesse Semiconductor
Vitesse Semiconductor

VSC7983 Datasheet Preview

VSC7983 Datasheet

11.3Gb/s Eml Driver

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VSC7983
Datasheet
11.2 Gbps Electroabsorption Modulator Driver
FEATURES
APPLICATIONS
5 V or –5.2 V power supply operation
Selectable data retiming
AC-coupled inputs
Internally-stabilized modulation and bias outputs
Excellent output return loss
300 mV differential data input sensitivity
Programmable output data eye crossing point
SONET OC-192 and SDH STM-64 transmission
systems up to 11.2 Gbps
10 GbE modules
VSR modules
Fiber optic transponder and transceiver modules
SONET/SDH test equipment
GENERAL DESCRIPTION
The VSC7983 device is a 11.2 Gbps electroabsorption modulator driver for SONET/SDH and 10 GbE applications.
The device provides selectable data retiming to improve jitter performance and controls for output bias voltage,
modulation voltage, and duty cycle. Internal operational amplifiers preclude the need for additional off-chip circuitry.
The unique architecture of the VSC7983 device provides excellent output impedance which improves the match
between the driver and load, further reducing output jitter. The VSC7983 device is available in a 32-pin
MicroLeadFrame™ (MLF) package, a high performance 32-pin metal-glass QFP package, or in die form.
Block Diagram
DATA
50
50
DATAN
VCC
VCC
Retimer
DCC
50
50
OUT
OUTN
CLK
CLKN
CSEL
PW
PWN
VMOD
VOFS
G52394 Revision 4.2
April 26, 2005
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • E-mail: prodinfo@vitesse.com
Internet: www.vitesse.com
1 of 22



Vitesse Semiconductor
Vitesse Semiconductor

VSC7983 Datasheet Preview

VSC7983 Datasheet

11.3Gb/s Eml Driver

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VSC7983 pdf
www.DataVSShCee7t948U3.com
Datasheet
REVISION HISTORY
This section describes the changes that have been implemented in this document. The changes are listed by revision,
starting with the most current publication.
Revision 4.2
Revision 4.2 of this datasheet was published on April 26, 2005. In revision 4.2 of the document, the package drawing
for VSC7983CD was updated to include pre-dipped and solder-dipped specifications. For more information, see
“Package Drawing for VSC7983CD‚’’ page 20.
FUNCTIONAL DESCRIPTION
The advantages of the VSC7983 device are its excellent output match, data retiming, internal stabilization of offset
and modulation, and small package size. The VSC7983 device provides up to 3 V of output modulation swing and
1 V of voltage offset (or bias). The output compliance (the lowest achievable level of output swing) is better than
3.4 V for VCC – VEE > 4.9 V power supply.
The VSC7983 device has been characterized at 4.75 V to verify operation over power supply variations in 5 V
systems. This reduction in power supply only affects the output voltage compliance and modulation limits. The
reduced output voltage compliance (VOC) is 3.3 V for modulation voltages (VOM) of up to 2.8 V. The VSC7983
device is capable of moving the crossing point from the top to the bottom of the output eye. Specifications are
guaranteed over all conditions for crossing points from 25% to 80%. For a crossing point from 25% to 85% the
modulation voltage (VOM) limit is reduced to 2.8 V. See Table 2 for these limitations.
The VSC7983 device inputs are to be AC-coupled and the outputs are to be DC-coupled. Information on AC-coupling
the outputs is available. For assistance with this and other configurations, please contact your local Vitesse sales
representative. Evaluation boards for all configurations and detailed supplemental information are also available.
Power Consumption
The VSC7983 device consumes 277 mA typical from a –5.2 V power supply and 300 mA maximum with a 2.5 V
output swing and 1 V offset voltage. The following equation provides an estimation of worst-case power dissipation:
PD = 5.5 V • (180 mA + VOM/25)
(EQ 1)
VCC
Output Bias Voltage (VBIAS)
Output Compliance Voltage (VOC)
Output HIGH Voltage (VOH)
Output Modulation Voltage (VOM)
Output LOW Voltage (VOL)
Figure 1. Output Voltage Range Specifications
2 of 22
G52394 Revision 4.2
April 26, 2005


Part Number VSC7983
Description 11.3Gb/s Eml Driver
Maker Vitesse Semiconductor
Total Page 22 Pages
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