Fiber Optic Products 800-336-2112 ext.279
Specifications and information are subject to change without prior notice.
© Copyright 2000, Litton Systems, Inc.
MSG80027 05/01
540-552-3011 international
540-953-4783 FAX
email: info@litton-ps.com
Multimode
Fiber Optic
Switch
FO4635
The Micro ElectroMechanical System (MEMS)
based multimode switch uses a movable mirror
process to allow light to pass through the switch on
activation or to be blocked/diverted when the switch
is deactivated. This makes the switch particularly
well suited for fail-safe bypass applications.
Switches are available in on/off, 1x2, and 2x2
configurations. There is also a high attenuation
version of the 2x2 switch used for node bypass (i.e.
FDDI) applications.
A standard PCB footprint allows the switch to
be conveniently mounted with control electronics.
The standard switch is equipped with 62.5/
125µm multimode fiber pigtails with no connec-
tors, but a variety of fiber and connector options are
available.
We speak the language of light.TM
For more information about our fiber optic prod-
ucts, contact Litton Poly-Scientific, Fiber Optic
Products, 1213 North Main Street, Blacksburg,
Virginia 24060-3100.
Litton Poly-Scientific
www.litton-ps.com
• FDDI bypass
• Local area network bypass
• Optical routing
• Loopback diagnostic testing
• Ring network protection
• Test access
• Small size 1.25”L X 0.54” W X 0.50” H
• Switching time <10.0 ms
• Low power consumption
• Fail-safe return to bypass mode with power-off
• Printed circuit board mountable
• Switch status, electrical contacts
• Low insertion loss
• High reliability
• High loss option for bypass & loopback testing
• Non-latching
• MEMS based design
APPLICATIONS
FEATURES
800-336-2112 ext.279
• 540-552-3011 • FAX 540-953-4783 • www.litton-ps.com • email: info@litton-ps.com
Litton Poly-Scientific, 1213 North Main Street, Blacksburg, VA 24060-3100
PART NUMBERING
FO4635 –
BASIC PART NUMBER
MULTIMODE FIBER
CODE SIZE INDEX NA
M 62.5/125
µm
GRADED .28
X SPECIAL
Identify Before Sale
Min Typ Max Unit
Environmental Ratings
Operating Temperature Range –30 –– 85 °C
Storage Temperature Range –40 –– 85 °C
Humidity (non-condensing) –– –– 95 %RH
Mechanical Life 1.0 –– –– M CYCLE
Characteristics
Actuation Voltage 4.75 5.0 5.5 V
Actuation Current –– 40 –– mA
Switching Time –– –– 10.0 ms
Loss* 1-3 port –– 0.7 0.8 dB
Loss* 2-4 port –– 0.7 0.8 dB
Loss* 3-4 port –– 0.8 1.0 dB
Loss* 1-2 port –– 0.8 1.0 dB
Loss* 1-2 port (high atten. bypass) 4.5 5.5 6.0 dB
Crosstalk 60 –– –– dB
Status Contacts @ 24VDC –– –– 1.0 A
*Loss without connectors.
DIMENSIONS
INPUT PORTS
CODE QUANTITY
01 1
02 2
* High Attenuation Bypass
WAVELENGTH
CODE λλ
λλ
λ
8 850nm
3 1300nm
X SPECIAL
CONNECTOR
CODE STYLE
NC NONE
FC FC/PC
SC SC/PC
SM SMA
ST ST
XX SPECIAL
PIGTAIL LENGTH
CODE LENGTH
S 1.5 meters
X SPECIAL
OUTPUT PORTS
CODE QUANTITY
01 1
02 2
B2 2HA*
TYPICAL SWITCH CONFIGURATION (2x2)
OPTICAL PATH STATUS CONTACTS
Switch on 1-3, 2-4 Closed
Switch off 1-2, 3-4 Open
SWITCH PIN CONFIGURATION
PIN NUMBER DESCRIPTION
1 +5 VDC
2 Common
3 N.O. Status Contact
4 N.O. Status Contact
5 Not Used
SPECIFICATIONS
