Sercalo SX Miniature Fiber Optic MEMS Switch, Latching 1x1, 1x2, 2x1 and 2x2
Miniature latching fiber optic MEMS switch in 1x1, 1x2, 2x1 and 2x2 configurations with typically 2 ms switching time and 0.4 dB insertion loss.
- Wavelength range
- 1240 to 1640 nm
- Insertion loss
- 0.4 dB typ., 1.0 dB max
- Crosstalk
- 75 dB typ., 60 dB
- Return loss
- 55 dB typ., 40 dB
Overview
The Sercalo SX series are miniature opto-mechanical switches for fiber optic communication systems and submodules. The switch is available in latching variants with 1x1, 2x1 or 2x2 architecture and can be supplied with single mode, multimode or polarisation-maintaining fiber. The single mode SX switch passes Telcordia GR-1221 qualification and the component is compliant with RoHS requirements 2015/863/EU.
Working principle
The optical switching function is realised by a silicon MEMS chip on which a mirror is moved in and out of the optical path by electrostatic actuation. In the latching variant, a bistable suspension mechanism keeps the last selected state when power is removed. The momentary (non-latching) type, SXNA, is maintained for legacy designs and is not recommended for new designs.
Electrical control
To operate the switch, 5 V and 0 V are applied to pins 1 and 2, which feed an internal DC-DC converter that generates the high voltage for actuator control. CMOS or TTL logic levels on pins 3 and 4 control the electrostatic actuator: setting pin 3 or pin 4 to logic high (5 V) for 20 ms selects the corresponding switch state (cross or bar). At rest, pins 3 and 4 should be pulled to 0 V and must not be left floating.
Key Features
- Latching operation: bistable mechanism keeps the last selected state in power off
- 1x1, 1x2, 2x1 and 2x2 port configurations
- Switching time typically 2 ms (max. 10 ms)
- Insertion loss between 0.4 dB and 1.0 dB
- Miniature housing of 23.2 x 10.1 x 6.0 mm
- TTL or CMOS logic control with integrated DC-DC converter
- Single mode, multimode, bend insensitive or PM fiber
- Meets Telcordia GR-1221 reliability standards
- RoHS compliant (2015/863/EU)
Specifications
| Wavelength range |
1240 to 1640 nm
Min 1240, max 1640
|
|---|---|
| Insertion loss |
0.4 dB typ., 1.0 dB max
Value @ 25 °C, without connectors
|
| Crosstalk |
75 dB typ., 60 dB
Datasheet lists 60 dB in the Max column (limit value)
|
| Return loss |
55 dB typ., 40 dB
Datasheet lists 40 dB in the Max column (limit value)
|
| Polarisation dependent loss | 0.03 dB typ., 0.07 dB max |
| Repeatability |
0.002 dB max
For constant temperature and polarisation
|
| Switching time | 2 ms typ., 10 ms max |
| Durability |
10^9 cycles
Typical
|
|
Wavelength range
50, 62
|
600 – 1700 nm |
|---|---|
|
Insertion loss
50, 62
|
<1.0 dB max
IL @ 1300 nm
|
|
Crosstalk
50, 62
|
>40 dB
CT max
|
|
Return loss
50, 62
|
35 dB
RL max
|
|
Response time
50, 62
|
<20ms |
| Supply voltage Vcc (pin 1) | 3.2 V min, 3.3 or 5 V typ., 5.25 V max |
|---|---|
| Current consumption Icc (pin 1) | 1 mA typ., 45 mA max |
| Logic level low (pins 3, 4) | 0.3 V max |
| Logic level high (pins 3, 4) | 3.0 V min |
| Selection pulse width | 10 ms min, 20 ms typ. |
| Control logic | TTL or CMOS logic |
| Operation temperature | 0 to 70 °C |
|---|---|
| Storage temperature | -40 to 85 °C |
| Size (L x W x H) |
23.2 x 10.1 x 6.0 mm
For single; web page states a footprint of 2 x 10 x 6 mm, datasheet value used
|
| Housing | Aluminum Housing; Plastic Housing (Not recommended for new designs) |
| Reliability |
Telcordia 1221
Single mode switch passes Telcordia GR1221 qualification
|
|---|---|
| RoHS | 2015/863/EU |
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- Protection switching
- Reconfiguration
- Optical subsystems
- Array integration
Options & Accessories
| Option | Description |
|---|---|
| SXLA | Latching switch — Latching switch type, aluminum housing |
| SXNA | Non-latching (momentary) switch — Not recommended for new designs |
| T | Plastic Housing — Packaging option; not recommended for new designs |
| 2x2 | 2x2 variant — 2 inputs, 2 outputs |
| 1x2 | 1x2 variant — 1 input, 2 outputs (no port 4) |
| 1x1 | 1x1 variant — 1 input, 1 output (no ports 4, 2) |
| 9 | SMF28 fiber |
| X | Bend insensitive fiber |
| 50 | MM 50 fiber |
| 62 | MM 62 fiber |
| OM4 | MM50-om4 fiber |
| 9PM | PM15-U40A fiber — Corning Panda fiber |
| N | Loose Tube (0.9 mm) — Sleeve type |
| B | Bare fiber — Sleeve type |
| 10 | Pigtail length 100 cm |
| 03 | Pigtail length 30 cm |
| NC | No connector |
| FP | FC-PC connector |
| FA | FC-APC connector — Also available as FC-APC (narrow key) |
| LP | LC-PC connector |
| LA | LC-APC connector |