125 Megabaud Versatile Link
The Versatile Fiber Optic
Connection
Technical Data
Features
• Data Transmission at Signal
Rates of 1 to 125 MBd over
Distances of 100 Meters
• Compatible with Inexpensive, Easily Terminated
Plastic Optical Fiber, and
with Large Core Silica Fiber
• High Voltage Isolation
• Transmitter and Receiver
Application Circuit Schematics and Recommended
Board Layouts Available
• Interlocking Feature for
Single Channel or Duplex
Links, in a Vertical or
Horizontal Mount
Configuration
Applications
• Intra-System Links: Boardto-Board, Rack-to-Rack
• Telecommunications
Switching Systems
• Computer-to-Peripheral
Data Links, PC Bus
Extension
• Industrial Control
• Proprietary LANs
• Digitized Video
• Medical Instruments
HFBR-0507 Series
HFBR-15X7 Transmitters
HFBR-25X6 Receivers
• Reduction of Lightning and
Voltage Transient
Susceptibility
Description
The 125 MBd Versatile Link
(HFBR-0507 Series) is the most
cost-effective fiber-optic solution
for transmission of 125 MBd data
over 100 meters. The data link
consists of a 650 nm LED
transmitter, HFBR-15X7, and a
PIN/preamp receiver, HFBR25X6. These can be used with
low-cost plastic or silica fiber.
One mm diameter plastic fiber
provides the lowest cost solution
for distances under 25 meters.
The lower attenuation of silica
fiber allows data transmission
over longer distance, for a small
difference in cost. These components can be used for high speed
data links without the problems
common with copper wire
solutions, at a competitive cost.
The HFBR-15X7 transmitter is a
high power 650 nm LED in a low
cost plastic housing designed to
efficiently couple power into 1
mm diameter plastic optical fiber
HCS® is a registered trademark of Spectran Corporation.
and 200 µm Hard Clad Silica
(HCS®) fiber. With the recommended drive circuit, the LED
operates at speeds from 1-125
MBd. The HFBR-25X6 is a high
bandwidth analog receiver containing a PIN photodiode and
internal transimpedance amplifier.
With the recommended application circuit for 125 MBd
operation, the performance of the
complete data link is specified for
of 0-25 meters with plastic fiber
and 0-100 meters with 200 µm
HCS® fiber. A wide variety of
other digitizing circuits can be
combined with the HFBR-0507
Series to optimize performance
and cost at higher and lower data
rates.
