1394b Dongles for Long-Distance Over Coaxial Cable
Extend 1394b Links up to 60m with Power Over Cable
Summary
Microchip’s EQCO-FW7501 and EQCO-FW5001 are two
extender solutions for the FireWire® serial bus, operating
over 75Ω and 50Ω coaxial cables respectively.
Each unit contains a 1394b transceiver (EQCO875SC-HS
or EQCO850SC-HS) that support full-duplex FireWire 800
(S800) data transfer rates (1.0 Gbit/s) over a single coax
cable. The transceiver includes an adaptive equalizer that
supports a cable length of up to 60m.
In addition to this long-distance, full-duplex data
transmission, these devices allow power to be transmitted
simultaneously from the host side to a target—such as
camera or hard drive—over the coax cable.
The Microchip coaxial extenders fully support
IEEE 1394b standards.
Implementation
Our 1394b Over Coax dongles make it easy to implement
long-distance FireWire-based applications. By taking
advantage of coaxial cable’s secure shielding, our
1394b dongles can even be used in electrically noisy
enviornments such as factories.
The EQCO-FW7501 supports up to 60 meters of 75Ω
coaxial cable; the EQCO-FW5001 supports up to 30m of
50Ω coaxial cable. In both cases, they operate at a data-
rate of up to 1.0 Gbit/s (S800).
The dongles give users the flexibility to determine the
best cable lengths for their applications. The transceiver
contains an equalizer that is fully adaptive that adjusts to
a variety of cable lengths as well as age and environmental
conditions like temperature, without any need for
programming. The dongles have a standard 1394b 9-pin
connector on one end and a 75Ω BNC or 50Ω SMA
connector on the opposite end.
These dongles are ideal for laboratory and industrial
applications, such as machine vision and factory
automation, where robust cabling is required. They can
also be used with high-flex, small-diameter coaxial cable
with rotating joints, if necessary, for applications where
multiple rotations are required.
Information subject to change. The Microchip name and logo and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. All other trademarks
mentioned herein are property of their respective companies. © 2014, Microchip Technology Incorporated. All Rights Reserved. Printed in the U.S.A. 2/14
DS00001674A
Visit our web site for additional product information and to locate your local sales office.
Microchip Technology Inc. • 2355 W. Chandler Blvd. • Chandler, AZ 85224-6199
www.microchip.com
Technical Specifications
IEEE 1394b Interface
Connector 9-Pin 1394b
Coax Interface/Cable
EQCO-FW5001: 50Ω
EQCO-FW7501: 75Ω
50Ω rated SMA
75Ω rated BNC
Power Over Cable
Max. Voltage 32V (1394b Bus voltage)
Max. Current 1.0A (limited by coax dongle linear power supply)
Max. Transmitted Power 32W (before cable losses)
Power Supply to Remote Device
Voltage Available Vin (bus voltage) −1V-Coax DC drop (varies with cable type/length)
Environmental
Operating Temperature 0°C to +50°C
Relative Humidity Up to 85% non-condensing
Storage Temperature −20°C to +70°C
Performance Specifications
Performance by Product and Cable Type
(All cable information at S800/1.0 Gbit/s data-rate) EQCO-FW7501 (75Ω) EQCO-FW5001 (50Ω)
RG174 50Ω/2.8 mm dia – 15 meters/49 feet
RTK 50Ω/2.8 mm dia – 25 meters/81 feet
RG58 50Ω/5 mm dia – 30 meters/67.5 feet
RG179 75Ω 20 meters/65 feet –
RG59 75Ω 40 meters/130 feet –
RG6 75Ω/5 mm 60 meters/195 feet –
