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VSC7969YD2 Datasheet

  • VSC7969YD2

  • 3.125Gb/s Integrated Transimpedance and Limiting Amplifier w...

  • 14頁

  • VITESSE

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VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7969
Features
鈥?Integrated
TIA and Limiting Amplifier
鈥?Low Power Consumption for SFF Applications
鈥?TO Package-Compatible Layout
鈥?On-Chip Signal Detect
鈥?On-Chip Linear Photocurrent Monitor
鈥?Single 3.3V Supply
鈥?5V Supply Operation via Wirebond Option
鈥?Compatible with PIN or Avalanche Detectors
鈥?Packages: 16-Pin TSSOP, TO-46, Bare Die
3.125Gb/s Integrated Transimpedance
and Limiting Amplifier with Signal Detect
Applications
鈥?2.488Gb/s, 3.125Gb/s SONET OC-48/
SDH STM-16
鈥?2.125Gb/s Fibre Channel
鈥?2.5Gb/s or 3.125Gb/s Ethernet Applications with
8B/10B Overhead
鈥?SFF Transceivers
General Description
The VSC7969 is a 3.125Gb/s transimpedance amplifier IC with a built-in limiting amplifier, a signal detect
feature and a photocurrent monitor. The VSC7969 does not require any external electrical components in the
construction of a high performance optical receiver such as for SONET/SDH applications. The analog output is
a differential signal with a minimum amplitude of 200mVp-p (single-ended). The VSC7969 operates with a sin-
gle power supply with a maximum power dissipation of 300mW. A PIN photodiode or APD can be connected
and separately biased to provide optimal performance.
The VSC7969 provides filtered bias for MSM and PIN photodetectors; applications using an APD photode-
tector must supply bias separately. The VSC7969 also provides a photocurrent monitor whose output is linearly
proportional to the input photocurrent.
The VSC7969 can operate from a single +3.3V supply or a +5V or -5.2V supply. The VSC7969 is offered
in die form and in a 16-pin plastic thin-shrink small outline package (TSSOP-16). A fully tested TO-46 outline
packaged receiver with a photodetector is also available.
Block Diagram
VCCS
Filter
+3.3V
Regulator
+5V
+3.3V
VCCD
GND
Dual power supply pins are
provided for +5V or +3.3V
operation. Only one power
supply pin should be connected.
50鈩?/div>
In
50鈩?/div>
VOUTP
VOUTN
Signal
Detect
Outputs need to
be AC-coupled
0.1碌F
0.1碌F
SD_OUT
SD_ADJ
VSC7969
Monitor
IMON
G52355-0, Rev 2.0
02/09/01
漏
VITESSE
SEMICONDUCTOR CORPORATION
鈥?741 Calle Plano 鈥?Camarillo, CA 93012
Tel: (800) VITESSE 鈥?FAX: (805) 987-5896 鈥?Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 1

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