TORX1951(F) - Toshiba America Electronic Components, Inc.

TORX1951(F)

2012-04-13

FIBER OPTIC RECEIVING MODULE

TORX1951(F)

GENERAL-PURPOSE OPTICAL RECEIVING MODULE

z Data rate: DC to 6 Mb / s (NRZ code)

z Transmission distance: Up to 40 m (Using TOTX1951(F) and APF)

z For JIS F05 Optical Connector

z TTL Interface

z ATC (Automatic Threshold Control) circuit is used for stabilized output at a wide range of optical power level.

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 6 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).

Using continuously heavy loads (e.g. the application of high temperature/current/voltage and the significant

change in temperature , etc) may cause this product to decrease in the reliability significantly even if the

operating conditions (i.e. operating temperature/ current/ voltage, etc.) are within the absolute maximum ratings.

Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook

(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test report and

estimated failure rate, etc).

2. Operating Ranges

Characteristics Symbol Min Typ. Max Unit

Supply Voltage VCC 4.75 5.0 5.25 V

High Level Output Current IOH - - −150 μA

Low Level Output Current IOL - - 2.0 mA

TORX1951(F)

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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 - 6 Mb / s

Transmission Distance

Using APF and TOTX1951(F) (Note3),

DC to 6 Mb/s

0.2 - 40 m

Pulse Width Distortion (Note4) Δtw

Using APF and TOTX1951(F),

Pulse width 165 ns

Pulse cycle 330 ns, CL = 10 pF

−55 - 55 ns

Maximum Receivable Power (Note 5) PMAX DC to 6 Mb / s, Using APF − 9 - - dBm

Minimum Receivable Power (Note 5) PMIN DC to 6 Mb / s, Using APF - - −27 dBm

Current Consumption ICC - 9 20 mA

High Level Output Voltage VOH Vcc=4.75V 3.5 4.0 - V

Low Level Output Voltage VOL Vcc=5.25V - 0.1 0.4 V

Note 2: 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 / 1000μm) with polished surface.

Note 4: Between input of TOTX1951(F) and output of TORX1951(F).

Note 5: BER ≤ 10−9, Valued by peak.

4. Application Circuit

5. Applicable Optical Fiber with Fiber Optic Connectors

All Plastic Fiber (980μm / 1000μm cladding ), NA=0.5

F05 type optical connector with polished surface.

TORX1951(F)

2012-04-13

6. Precautions during use

(1) Absolute maximum rating

The absolute 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 absolute maximum rating value is exceeded, the

characteristics of devices may never be recovered 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.

(3) Soldering

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

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

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

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

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

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

may be flux residue or flux removal after soldering is not recommended. Toshiba recommends that

soldering be performed without the optical module mounted on the board. Then, after the board is cleaned,

solder the optical module manually. Do not perform any further cleaning.

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 case, check the reliability.

(4) Noise resistance

Where the fiber optic receiving module case uses conductive resin, shield by connecting the reinforcing pin

at a front end of the module to GND. When using this optical module, connect the pin to SIGNAL−GND.

Where the fiber optic receiving module case has a resistance of several tens of ohms, take care that the

case does not contact power line of other circuits.

It is believed that the use of optical transfer devices improve the noise resistance. In principle, optical fiber

is not affected by noise. However, especially receiving module which handle signals whose level is

extremely small, are comparatively more susceptible to noise.

TOSLINK improves noise resistance using a conductive case. However, the current of the signal output

from the photodiode of the optic receiving module is extremely small. Thus, depending on the usage

environment, shielding the case is not sufficient for noise resistance.

When using TOSLINK, Toshiba recommends that you test using the actual device and check the noise

resistance.

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

supply used is high, further reinforce the filter.

When locating the optical module in an area susceptible to radiated noise, increase shielding by covering

the optical module and the power line filter using a metallic cover.

(5) Vibration and shock

This module is resin−molded construction with wire fixed by resin. This structure is relatively sound against

vibration or shock, In actual equipment, there are some cases where vibration, shock, and stress is applied

to soldered parts or connected parts, resulting in line cut. Attention must be paid to the design of the

mechanism for applications which are subject to large amounts of vibration.

(6) Fixing fiber optical receiving module

Solder the fixed pin (pins 5 and 6) of fiber optic receiving module TORX1951(F) to the printed circuit board

to fix the module to the board.

TORX1951(F)

2012-04-13

(7) Shielding and wiring pattern of fiber optic receiving modules

To shield, connect the fixed pins (pins 5 and 6) of fiber optic receiving module TORX1951(F) to the GND.

Where the fiber optic receiving 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.

(8) Solvent

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

solvent in the optical connector ports. If solvent is inadvertently poured there, clean with cotton tips.

(9) Protective cap

When the fiber optic receiving module TORX1951(F) is not in use, use the protective cap.

(10) Supply voltage

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

does not exceed the absolute maximum rating value of 6 V, even instantaneously.

(11) Output

When the receiver output is at low level and connected to the power supply, or when the output is at high

level and connected to GND, the internal IC may be destroyed.

(12) Soldering condition

Solder at 260°C or less within ten seconds.

(13) Incidence of a photo Flash

If strong light such as a photo flash is incident on an optical module, a transmission error may occur.

Be careful to avoid such situations.

(14) Precaution on waste

When discarding devices and packing materials, follow procedures stipulated by local regulations in order

to protect the environment against contamination.

TORX1951(F)

2012-04-13

7. Package Outline drawing

Unit: mm

Pin connection

1.Output

2.GND1

3.Vcc

4.GND2

5.Case

6.Case

TORX1951(F)

2012-04-13

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