850nm Fast Ethernet
Transceiver in 1 x 7 SMD
Package
OPF5020
Features
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Small Form Factor surface mount package
MT-RJ Receptacle
Low cost 850 nm LED design
Link distance up to 300m at 125Mbps
Fully complies with the 100BASE-SX Fast
Ethernet Standard (TIA-785)
Single +5V power supply
Technical Data
Description
Optek’s OPF5020 is a 125Mbps SFF transceiver for use in
data communications applications. It utilizes a MT-RJ dual
fiber receptacle which features a small size and intuitive latch-
ing mechanism design which allows for higher density imple-
mentations and easier end-user installation.
The transmitter is an 850 nm GaAlAs LED, configured for
optimum transceiver performance when used in conjunction
with a low-side driver. The coupling efficiency of the LED and
optical system allows the device to be used at low current
levels, reducing power consumption and increasing system
reliability.
The receiver consists of a high speed PIN photodiode coupled
to a low noise transimpedance amplifier. The receiver output
is a low impedance analog source. The analog representa-
tion of the received optical input can be easily converted to
PECL or TTL levels by external circuitry to be used in digital
modes up to 125Mbps, NRZ.
Combining the OPF5020 with commercially available LED
driver and post amplifier circuits results in a physical layer
medium dependent (PMD) sub-layer for communication be-
tween nodes of a fiber network. Optek
Application Bulletin
217
presents an example PMD design with typical receiver
sensitivity of –30dBm at a BER of 2.5 x 10
-10
, operating full
duplex with either a 2
23
-1 or worst case FDDI data pattern.
The OPF5020 has been fully tested in accordance with Bell-
core 468. See
Application Bulletin 219
for full details.
Absolute Maximum Ratings
Storage Temperature Range
Operating Temperature Range
Soldering Temperature (Soldering Iron)
Soldering Temperature (Vapor Phase Reflow)
-40 to +85 °C
0 to +70 °C
260 °C for 10 Seconds
235 °C for 30 Seconds
Transmitter
Forward Input Current (DC)
Reverse Input Voltage
100 mA
3.5 V
Receiver
Supply Voltage Range
Output Current
-0.5 to 6V
25mA
Notes:
1.
All transmitters are subjected to 100% burn-in testing. Test condi-
tions are 96 hours at 60 mA continuous current and 85°C ambient
temperature.
This component is susceptible to damage from electrostatic dis-
charge (ESD). Normal electronic component handling precautions
should be observed during handling and assembly of this compo-
nent to avoid damage or performance degradation.
Safety Information:
•
Class 1 Laser Product (850nm Light Emitting Diode)
2.
3.
•
TUV certified to EN60825-1:1994+A11+A2 and IEC
60950:1999/ EN60950:2000
Optek Technology, Inc.
1215 West Crosby Road
Carrollton, Texas 75006
(972) 323-2200
www.optekinc.com
OPTEK [ OPTEK TECHNOLOGIES ]
