S2036
Open Fiber Control
Product Brief
PB2029_v1.00_11/11/05
Overview
The OFC system is an open fiber link
detection and laser control system speci-
fied in ANSI XT311 Fibre Channel
physical standard. It is used as a safety
interlock for point-to-point optical fiber
links that use semiconductor laser
diodes as the optical source. The major
reason for implementing OFC is that the
optical power levels required to obtain
the desired level of system performance
in Fibre Channel exceeds the Class 1
limits defined by national and interna-
tional laser safety standards, if the
optical fiber link between two optical
ports is disconnected, such as would
occur with an opened connector or a cut
fiber. It is extremely important that
requirements for Class 1 classification
are met, due to the potential for cus-
tomer exposure to laser radiation.
Since it is only when an optical link is
opened that a user can be exposed to
laser radiation, implementing OFC
allows Class 1 classification require-
ments to be met, since it can detect
when the link has been disrupted and
can shut down the laser or reduce the
optical power level. The S2036 complies
fully with the OFC specifications and
Class 1 requirements.
Refer to the ANSI Fibre Channel stan-
d a r d d o c u m e n t f o r d e ta i l s o f O F C
operation.
AMCC Suggested Interface Devices
S2042/S2043
High Performance Serial Digital
Interface Circuit
GLM Compliant Serial Interface
Circuit
–
At a Glance
–
S2036
General Features
• Implements redundant safety
interlock for laser-based fiber
optic systems
• Functionally compliant with ANSI
XT311 Fibre Channel physical
standard
• Enables Class 1 safety
compliance for FDA, ANSI, and
IEC guidelines
• Operates with the AMCC S2042/
S2043, and S2044/S2045 Fibre
Channel Chipsets at 265.625,
531.25, and 1062.5 Mbit/s
• On-chip ring oscillator
• Ultra low power operation
• 28-pin SOIC package with Green/
RoHS compliant lead free option
• PECL Interface
Description
The S2036 is designed specifically to
implement the Fibre Channel Open Fiber
Control (OFC) system, a redundant
safety interlock feature for laser-based
fiber optic systems. It is functionally
compliant with the ANSI XT311 Fibre
Channel
physical
standard
and
implements the OFC system defined by
that standard, to detect when the optical
link has been disrupted and shut down
the laser or reduce the optical power
level. The S2036 employs effectively
redundant paths, each of which can
independently turn off the laser.
The chip meets the requirements of
Class 1 safety limits defined by FDA,
ANSI, and IEC. It is fully compatible with
AMCC's S2042/S2043 and S2044/
S2045 Fibre Channel chipsets at
265.625, 531.25, and 1062.5 Mbit/s
operation.
It
features
low-power
operation and a 28-pin SOIC package.
Figure 1,
System Block Diagram,
shows
a typical network application.
Applications
• Laser-based fiber optic systems
• Medical and laboratory
instrumentation
• High-speed data and
telecommunications
-Supercomputer
-Frame buffer
-Mainframe
-Switched networks
-Broadcast
-Mass storage/RAID
-Workstations
S2044/S2045
S2042
or S2044
TX
S2036
Open Fiber
Control (OFC)
Optical
TX
Optical
RX
S2043
or S2045
RX
S2036
Open Fiber
Control (OFC)
S2043
or S2045
RX
Optical
RX
Optical
TX
S2042
or S2044
TX
Figure 1. System Block Diagram
Empowering Intelligent Optical Networks
1
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
