MEMS -1×N Optical Switch

MEMS -1×N Optical Switch
Features
Fast switching speed and long life
Low loss, high reliability
Modular design, small size
TTL interface, easy to control

Technical indicators

serial number	parameter	unit	index	Remark
1	Working wavelength	nm	1250~1700
2	Test wavelength	nm	1310&1550	customizable
3	Fiber Type		single/multimode
4	aisle		32	2-32 channels can be customized
5	Insertion loss	dB	≤1.0
6	return loss	dB	≥50
7	repeatability	dB	≤±0.02
8	crosstalk	dB	≤-50
9	switching time	ms	≤15
10	switch life	Second-rate	≥109
11	Maximum input optical power	mW	500
12	Operating temperature	℃	-5~+75
13	storage temperature	℃	-40~+85℃
14	Power Requirements	V	DC 5V

Electrical Characteristics
1×N MEMS Optical Switch Electrical Characteristics Table

serial number	parameter	unit	minimum	typical	maximum
1	Supply voltage (VCC)	VDC	4.5	5	5.5
2	Digital I/O logic high level (VIH, VOH)	VDC	2.0	3.3	3.8
3	Digital I/O logic low level (VIL, VOL)	VDC	0	0.5	0.8
4	Power consumption (@5.0V)	mW	-	-	600

Note: There are some differences between different modules, please refer to the actual power consumption.

Instructions for use
Outline Drawing and Installation Instructions
The external dimension of the MEMS optical switch module is 68 mm×30 mm×13 mm. Taking a 1×4 optical switch as an example, the external dimensions are shown in Figure 2 (other models only differ in the number of fibers):


When installing the MEMS optical switch module, the optical fiber must not be bent excessively (refer to Figure 3), so as not to affect the performance index.


Pin Definition

pin number	pin definition	pin type	level	Function Description
1	NC	/	/	/
2	VCC	Power IN	/	DC +5V Positive input of power supply, maximum current 120mA
3	/STROBE	IN	LVTTL	TTL mode: valid on falling edge
4	GND	Power IN		power ground
5	D0	IN	LVTTL	TTL mode: data bit D0 input
6	NC	/	/	Reserved interface, no electrical connection
7	NC	/	/	Reserved interface, no electrical connection
8	NC	/	/	Reserved interface, no electrical connection
9	D2	IN	LVTTL	TTL mode: data bit D2 input
10	D4	IN	LVTTL	TTL mode: data bit D4 input
11	GND	Power IN		power ground
12	D1	IN	LVTTL	TTL mode: data bit D1 input
13	D3	IN	LVTTL	TTL mode: data bit D2 input
14	/RESET	IN	LVTTL	Reset, active low, pulse width ≥ 0.5ms

Note: LVTTL is 3.3V LVTTL; STROBE (pin 3)
Only used in TTL mode, D0~D4 can change the level when it is high, and a falling edge pulse will make the optical switch switch to the corresponding channel.
RESET (14 pins)
A falling edge pulse switches the optical switch to the reset state, and the optical path is channel 1.

Instructions
1) The MEMS optical switch module has a control circuit interface, which is connected to an external control circuit through a direct outlet. The interface pins are defined as shown in Table 3. After the optical switch is started, it is initialized to the reset state, and the optical path is channel 1.
2) After the optical switch module is powered off, the optical path cannot be maintained on the original channel.
3) The MEMS optical switch module has an input and output fiber bundle, and the fiber diameter is φ0.9mm. The input fiber (public fiber) is marked with 0, and the output fiber is marked with 1, 2, 3, and 4 respectively, indicating 4 corresponding output fibers.
4) MEMS optical switch module control mode: TTL parallel digital I/O control.

LVTTL parallel digital I/O control
LVTTL control can only be used for optical switches with 5 LVTTL control pins (D0, D1, D2, D3, D4), up to 32 channels. The corresponding relationship between the level of the LVTTL control pin and the channel is shown in Table 4. When using, the LVTTL control pin should be configured according to the actual number of optical paths of the optical switch.

aisle	D4	D3	D2	D1	D0
1	0	0	0	0	0
2	0	0	0	0	1
3	0	0	0	1	0
. . .	. . .	. . .	. . .	. . .	. . .
23	1	0	1	1	0
24	1	0	1	1	1

The logic control diagram is as follows


Precautions and maintenance
In order to avoid damage to the MEMS optical switch module, please read the following rules carefully before use:
1) Please use alcohol cotton to clean the fiber end face of the connector before use, and wear a dust cap when not in use to prevent dust or other dirt from contaminating or damaging the fiber end face. Damage or contamination of the fiber end face will affect the performance of the MEMS optical switch.
2) It is strictly forbidden to pull, fold or twist the optical fiber to avoid damage to the optical fiber.
3) For the detailed pin definitions of the control interface, refer to Table 3 above to ensure that the wiring is correct. After confirming that the connection is correct, power on again. Note: The working voltage of the MEMS optical switch module cannot exceed the rated voltage, and the power supply and ground cannot be reversed, otherwise the module will be damaged.
4) When the external circuit needs to be changed, please turn off the power first, and then disconnect the control line of the module.
5) When the MEMS optical switch module has optical signal input, do not look directly at the fiber end face. Laser radiation is invisible but can cause damage to the human eye!
6) This device should be fireproof and shockproof, and avoid storing and working in an excessively humid environment.
7) This device is a precision optical device and should not be disassembled without authorization to avoid damage.
8) The product is used under the specified conditions and will not pollute the atmosphere, water and land. The packaging does not contain hazardous waste and can be safely disposed of by the user.
9) The parts and components replaced by product maintenance shall be brought back by the maintenance personnel of our unit for disposal according to regulations. When the product is discarded or scrapped, the user shall dispose of it in accordance with environmental protection regulations.