TODX295A - Toshiba - Product.Network

TODX295A(F)

2007-03-10

FIBER OPTIC TRANSCEIVING MODULE

TODX295A(F)

GENERAL-PURPOSE OPTICAL

TRANSCEIVING MODULE

z Data rate: DC to 10 Mb / s (NRZ code)

z Transmission distance: Up to 50 m

z TTL interface

z LED is driven by Differential circuit.

z ATC (Automatic Threshold Control) circuit is

used for stabilized output at wide range of

optical power level.

z 650nm LED

z ＲｏＨＳ Compliant

1. Absolute Maximum Ratings (Ta = 25°C)

Characteristics Symbol Rating Unit

Storage Temperature Tstg −40 to 85 °C

Operating Temperature Topr −40 to 85 °C

Supply Voltage VCC −0.5 to 7 V

Input Voltage VIN −0.5 to VCC + 0.5 V

Low Level Output Current IOL 20 mA

High Level Output Current IOH −1 mA

Soldering Temperature Tsol 260 (Note 1) °C

Note 1: Soldering time ≤ 10 s (More than 1 mm apart from the package).

Unit: mm

ＨＯＴ－００１８

TODX295A(F)

2007-03-10

2. Operating Ranges

Characteristics Symbol Min Typ. Max Unit

Supply Voltage VCC 4.75 5.0 5.25 V

High Level Input Voltage VIH 2.0 ― V

CC V

Low Level Input Voltage VIL 0 ― 0.8 V

High Level Output Current IOH ― ― −150 µA

Low Level Output Current IOL ― ― 1.6 mA

3. Electrical and Optical Characteristics (Ta = 25°C, VCC = 5 V)

Characteristics Symbol Test Condition Min Typ. Max Unit

Data Rate NRZ Code(Note 2) DC ― 10 Mb / s

Transmission Distance Using APF (Note 3) and TODX295A(F) 0.2 ― 50 m

Pulse Width Distortion (Note 4) ∆tw

Using APF and TODX295A(F)

Pulse width 100 ns

Pulse cycle 200 ns, CL = 10 pF

−30 ― 30 ns

Fiber Output Power Pf APF 1 m, R = 1.2 kΩ (Note 5) −11 ― −6 dBm

Peak Emission Wavelength λp ― 650 ― nm

Maximum Receivable Power (Note 6) PMAX DC to 10 Mb / s, Using APF −14 ― ― dBm

Minimum Receivable Power (Note 6) PMIN DC to 10 Mb / s, Using APF ― ― −27 dBm

Current Consumption ICC R = 1.2 kΩ ― 47 80 mA

High Level Input Voltage VIH 2.0 ― ― V

Low Level Input Voltage VIL ― ― 0.8 V

High Level Input Current IIH ― ― 20 µA

Low Level Input Current IIL ― ― −0.4 mA

High Level Output Voltage VOH 2.7 ― ― V

Low Level Output Voltage VOL ― ― 0.4 V

Note 2: LED is on when input signal is high level, it is off when low level.

High level output when optical flux is received. Low level output when it is not received.

The duty factor must be kept 25 to 75%.

Note 3: All Plastic Fiber (980 / 1000 µm) with polished surface.

Note 4: Between input of TODX295A(F) and output of TODX295A(F).

Note 5: Measure with a standard optical fiber with fiber optic connectors. Valued by peak.

Note 6: BER ≤ 10−9, Valued by peak.

TODX295A(F)

2007-03-10

4. Application Circuit

Note 7: Select a resistor value as follows:

Fiber Optic Connector

Type Name

Transmission

Distance

(m)

Resistor

(Ω)

0.2 to 15 30 k

15 to 30 15 k

F07 type Optical

Connector with

Polished Surface. 30 to 50 3.9 k

5 Applicable Optical Fiber with Fiber Optic Connectors

All Plastic fiber (980um core/1000um cladding),NA=0.5

F07 type Optical Connector with Polished Surface.

6. Precautions during use

(1) Absolute maximum rating

The maximum ratings are the limit values which must not be exceeded during operation of device. None of

these rating value must not be exceeded. If the maximum rating value is exceeded, the characteristics of

devices may never be restored properly. In extreme cases, the device may be permanently damages.

(2) Operating Range

The operating range is the range of conditions necessary for the device to operate as specified in

individual technical datasheets and databooks. Care must be exercised in the design of the equipment.

If a device is used under conditions that do not exceed absolute maximum ratings but exceed the

operating range, the specifications related to device operation and electrical characteristics may not be

met, resulting in a decrease in reliability.

If greater reliability is required, derate the device’s operating ranges for voltage, current, power and

temperature before use.

0.1uF

(

)

TODX295A(F)

2007-03-10

(3) Lifetime of light emitters

If an optical module is used for a long period of time, degeneration in the characteristics will mostly be due

to a lowering of the fiber output power (Pf). This is caused by the degradation of the optical output of the

LEDs used as the light source. The cause of degradation of the optical output of the LEDs may be defects

in wafer crystallization or mold resin stress. The detailed causes are, however, not clear.

The lifetime of light emitters is greatly influenced by the operating conditions and the environment in which

it is used as well as by the lifetime characteristics unique to the device type. Thus, when a light emitting

device and its operating conditions determined, Toshiba recommend that lifetime characteristics be

checked.

Depending on the environment conditions, Toshiba recommend that maintenance such as regular checks

of the amount of optical output in accordance with the condition of operating environment.

(4) Soldering

Optical modules are comprised of internal semiconductor devices. However, in principle, optical modules

are optical components. During soldering, ensure that flux does not contact with the emitting surface or the

detecting surface. Also ensure that proper flux removal is conducted after soldering.

Some optical modules come with a protective cap. The protective cap is used to avoid malfunction when

the optical module is not in use. Note that it is not dust or waterproof.

As mentioned before, optical modules are optical components. Thus, in principle, soldering where there

may be flux residue and flux removal after soldering is not recommended. Toshiba recommend that

soldering be performed without the optical module mounted on the board. Then, after the board has been

cleaned, the optical module should be soldered on to the board manually.

If the optical module cannot be soldered manually, use non−halogen (chlorine−free) flux and make sure,

without cleaning, there is no residue such as chlorine. This is one of the ways to eliminate the effects of

flux. In such a cases, be sure to check the devices’ reliability.

(5) Noise resistance

It is believed that the use of optical transfer devices improve noise resistance. In theory, optical fiber is not

affected by noise at all. However, receiving modules which handle signals whose level is extremely small,

are susceptible to noise.

TOSLINK improve noise resistance to use a conductive case. However, the current signal output by the

optical receiving modules’ photodiode is extremely small. Thus, in some environments, shielding the case

may not achieve sufficient noise resistance.

First systems which incorporate TOSLINK, Toshiba recommend testing using the actual device to check its

noise resistance.

Use a simple noise filter on TOSLINK fiber optic transceiving module’s power line. If the ripple in the power

supply used is significant, reinforce the filter.

The optical module is to be used in an area which is susceptible to radiated noise, increase the shielding

by covering the optical module and the power line filter with a metallic cover.

(6) Vibration and shock

This module is plastic sealed and has its wire fixed by resin. This structure is relatively resistant to vibration

and shock. In actual equipment, there are sometime cases in which vibration, shock, or stress is applied to

soldered parts or connected parts, resulting in lines cut. A care must be taken in the design of equipment

which will be subject to high levels of vibration.

(7) Fixing fiber optical transceiving module

Solder the fixed pin (pins 9 and 10) of fiber optic transceiving module TODX295A(F) to the printed circuit

board to fix the module to the board.

(8) Shielding and wiring pattern of fiber optic transceiving modules

To shield, connect the fixed pins (pins 9 and 10) of fiber optic transceiving module TODX295A(F) to the

GND.

Where the fiber optic transceiving module uses conductive resin, be careful that the case does not touch

wiring (including land).

To improve noise resistance, shield the optical module and the power line filter using a metallic cover.

TODX295A(F)

2007-03-10

(9) Solvent

When using solvent for flux removal, do not use a high acid or high alkali solvent. Be careful not to pour

solvent in to the optical connector ports. If solvent is inadvertently poured in to them, clean it off using

cotton tips.

(10) Protective cap

When the TODX295A(F) is not in use, attach the protective cap.

(11) Supply voltage

Use the supply voltage within the operating condition (VCC = 5 ± 0.25 V). Make sure that supply voltage

does not exceed the absolute maximum rating value of 7 V, even for an instant.

(12) Input voltage

If a voltage exceeding the absolute maximum rating value (VCC + 0.5 V) is applied to the transmitter input,

the internal IC may suffer damage. If there is a possibility that excessive voltage due to surges may be

added to the input terminal, insert a protective circuit.

(13) Output

If the receiver output is at low and is connected to the power supply, or if the output is high and is

connected to GND, the internal IC may be destroyed.

(14) Soldering condition

Solder at 260°C or less for no more than ten seconds.

(15) Precautions when disposing of devices and packing materials.

When disposing devices and packing materials, follow the procedures stipulated by local regulations in

order to protect the environment against contamination.

Compound semiconductors such as GaAs are used as LED materials in this module. When devices are

disposed of, worker safety and protection of the environment must be taken into account.

(16) Precautions during use

Toshiba is continually working to improve the quality and the reliability of their products. Nevertheless,

semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and their

vulnerability to physical stress. It is the responsibility of the buyer, when utilizing Toshiba products, to

observe standards of safety, and to avoid situations in which the malfunction or failure of a Toshiba

product could cause loss of human life, bodily injury or damage to property.

When developing equipment, please ensure that Toshiba products are used within the specified operating

ranges set forth in the most recent product specifications. Also, please keep in mind the precautions and

conditions set forth in the Toshiba Semiconductor Reliability Handbook.

TODX295A(F)

2007-03-10

• The information contained herein is subject to change without notice.

• TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor

devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical

stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of

safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of

such TOSHIBA products could cause loss of human life, bodily injury or damage to property.

In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as

set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and

conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability

Handbook” etc..

• The TOSHIBA products listed in this document are intended for usage in general electronics applications

(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,

etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires

extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or

bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or

spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,

medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this

document shall be made at the customer’s own risk.

• The information contained herein is presented only as a guide for the applications of our products. No

responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which

may result from its use. No license is granted by implication or otherwise under any patent or patent rights of

TOSHIBA or others.

• GaAs(Gallium Arsenide) is used in this product. The dust or vapor is harmful to the human body. Do not break,

cut, crush or dissolve chemically.

• Please use this product in compliance with all applicable laws and regulations that regulate the inclusion or use of

controlled substance. TOSHIBA assumes no liability for damage or losses occurring as a result of noncompliance

with applicable laws and regulations.

RESTRICTIONS ON PRODUCT USE