MEMS SWITCHES mSC 1xN

Sercalo's fiber optic 1xN and 2xN switches are bidirectional opto-mechanical switches based on a coaxial design where a single MEMS mirror redirects light from a common fiber to one of N ports. The MEMS technology results in low insertion loss and low cross-talk between channels while keeping a constant switching performance over life.

The switch is available in several different variants to simplify integration in existing systems and reduce development cost. The miniature packages withstands rugged environments and is well suited for direct mounting on printed circuit boards. The hermetically sealed MEMS and the laser welded fiber collimator guarantee broad temperature range and superior long-term stability. No epoxy is present in the optical path.

The component is compliant to Telcordia 1221 reliability standards and RoHS requirements 2015/863/EU.

FEATURES

• Low insertion loss
• Reliable
• UART, I2C/SMBus and parallel interface
• Ethernet interface available on request
• RoHS compliant

APPLICATIONS

• Telecom
• Instrumentation
• Test and measurement

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DESCRIPTION

Sercalo's fiber optic 1xN and 2xN switches are bidirectional opto-mechanical switches based on a coaxial design where a single MEMS mirror redirects light from a common fiber to one of N ports. The MEMS technology results in low insertion loss and low cross-talk between channels while keeping a constant switching performance over life.

The switch is available in several different variants to simplify integration in existing systems and reduce development cost. The miniature packages withstands rugged environments and is well suited for direct mounting on printed circuit boards.

The hermetically sealed MEMS and the laser welded fiber collimator guarantee broad temperature range and superior long-term stability. No epoxy is present in the optical path.

The component is compliant to Telcordia 1221 reliability standards and RoHS requirements 2015/863/EU.

Sercalo’s COAXIAL TYPE 1xN switch is non-latching: at power-off it breaks the optical connection and routing of the common port is not defined. The component is bidirectional, the common port can be used as input or output. The PM Panda version is offered up to 1x4 ports.

The switch is available in four different variants:

SC: standard size – ribbon fibers
mSC: miniature size – small driver board: 7x40 mm
rSC: compatible with industry pin-out, 900 µm sleeved fibers and connectors
bcSC: bare optical component

TECHNICAL SPECIFICATIONS

 UnitMinTypMax
Optical Specifications        
Wavelength range nm 1250   1670
Insertion loss up to 1x41  dB   0.4 1.0
Insertion loss up to 1x161  dB   0.8 1.2
Insertion loss up to 1x241 dB   1.0 1.5
Insertion loss up to 1x361 dB   1.2 2.0
Crosstalk  dB 50  60  
Polarization dependent loss  dB     0.1
Return loss  dB 50  55   
Wavelength dependent loss (one band)  dB     0.2
Wavelength dependent loss (1250–1670 nm)  dB   0.5  1.0
Temperature dependent loss  dB     0.2
Maximum optical power level2 mW     500
Switching time ms   5 10
Cycle rate Hz   10 50
Repeatability3 dB     0.01
Durability cycles No wear out
Optical Specifications (PM fiber - up to 1x4)  
Polarization extinction ratio dB 20    
Electrical Specifications (SC, mSC, rSC)  
Supply voltage V 4.75 5 5.25
Power consumption, normal mode mW     150
Power consumption, standby mW   40  
UART speed baud 9600   115200
SMBus/I2C bus speed kbps     400
Input logic level low V   0 0.6
Input logic level high V 2.4 5  
Output logic level low V   0 0.6
Output logic level high V 2.6 3.3  
Reset inactive voltage4 V 2.4 5 0.9
Reset active voltage V   0  
Reset pulse duration μs 15    
Electrical Specifications (bcSC)  
Driving voltage V 0    
Driving voltage damage threshold V     45
Electrostatic discharge tolerance5 V     50
Package  
Operating temperature ˚C -10   70
Storage temperature ˚C -40   85
Operation humidity (non condensing) % r.h.     95
Pigtail length cm     100
DimensionsSC mm 40 x 21 x 7
mSC mm 40 x 7 x 7.5
rSC mm 68 x 30 x 9
bcSC mm ∅ 6 x 35
RoHS Compliance 2015/863/EU (no exceptions)

1 Values at 25 ˚C at 1550 nm, without connectors. For operation over several bands 1250 to 1670 add 0.5 dB.
2 It is recommended to turn off the laser during switch transients when switching optical power above 100 mW.
3For constant temperature and polarization.
4Through onboard pull-up resistor.
5The bare optical component is not protected against ESD.

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  Rue des Draizes 5,
     CH 2000 Neuchâtel
     Switzerland
  + 41 32 732 15 20
  + 41 32 732 15 29
  info@sercalo.com

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