TOTX1951(F) FIBER OPTIC TRANSMITTING MODULE TOTX1951(F) GENERAL PURPOSE OPTICAL TRANSMITTING MODULE z Data rateDC to 6Mbs (NRZ code) z Transmission distanceUp to 50m (Using TORX1951(F) and APF) z For JIS F05 Optical Connector z TTL interface z LED is driven by differential circuit. z 650 nm LED 1. Absolute Maximum Ratings (Ta = 25C) 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 Input Voltage VIN -0.5 to VCC + 0.5 V Soldering Temperature Tsol 260 (Note 1) C Note 1: Soldering time 10 seconds (At a distance of 1 mm 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 Input Voltage VIH 2.0 - VCC V Low Level Input Voltage VIL 0 - 0.8 V 1 2012-04-13 TOTX1951(F) 3. Electrical and Optical Characteristics (Ta = 25C, 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 (Note 3) and TORX1951(F) 0.2 - 40 m Using APF and TORX1951(F) Pulse width 165 ns Pulse cycle 330 ns, CL = 10 pF -55 - 55 ns R = 1.2k -15 - -9 dBm - 650 - nm - 25 40 mA Pulse Width Distortion (Note 4) tw Fiber Output Power (Note 5) Pf Center Emission Wavelength c Current Consumption ICC High Level Input Voltage VIH 2.0 - - V Low Level Input Voltage VIL - - 0.8 V High Level Input Current IIH VI=2.7V - - 20 A Low Level Input Current IIL VI=0.4V - - -0.4 mA R = 1.2k Note 2: LED is on when input signal is high level, it is off when low level. The duty factor must be kept 25 to 75%. Note 3: All Plastic fiber (980 / 1000m, NA=0.5) with polished surface. Note 4: Between input of TOTX1951(F) and output of TORX1951(F). Note 5: Measure with a standard optical fiber with fiber optic connectors. Valued by peak. 4. Application Circuit Within 7mm C0.1F R (Note 6) Note 6: Select a resistor value as follows: (With TORX1951(F)) Fiber Optic Connector Type Name F05 type Optical connector APF(980 / 1000m) with polished surface. Transmission Distance (m) Resistor () 0.2 to 40 1.2k 5. Applicable Optical Fiber with Fiber Optic Connectors All Plastic Fiber (980m core / 1000m cladding). NA=0.5. F05 type optical connector with polished surface. 2 2012-04-13 TOTX1951(F) 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 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. (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) 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 sometimes 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. (6) Attaching the fiber optic transmitting module Solder the fixed pin (pins 4 and 5) of the fiber optic transmitting module TOTX1951(F) to the printed circuit board in order to fix it to the board. (7) 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. 3 2012-04-13 TOTX1951(F) (8) Protective cap When the TOTX1951(F) is not in use, attach the protective cap. (9) Supply voltage Use the supply voltage within the operating range (VCC = 5 0.25 V). Make sure that supply voltage does not exceed the absolute maximum rating value of 6 V, even for an instant. (10) Input voltage If a voltage exceeding the absolute maximum rating value (VCC + 0.5 V) is applied to the transmitters' 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. (11) Soldering condition Solder at 260C or less for no more than ten seconds. (12) 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. (13) 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. 4 2012-04-13 TOTX1951(F) 7. Package Outline drawing Unit: mm Pin connection 1.GND 2.Current limiting resistor of LED 3.Vcc 4.Input 5.N.C. 6.N.C 5 2012-04-13 TOTX1951(F) RESTRICTIONS ON PRODUCT USE * Toshiba Corporation, and its subsidiaries and affiliates (collectively "TOSHIBA"), reserve the right to make changes to the information in this document, and related hardware, software and systems (collectively "Product") without notice. * This document and any information herein may not be reproduced without prior written permission from TOSHIBA. Even with TOSHIBA's written permission, reproduction is permissible only if reproduction is without alteration/omission. * Though TOSHIBA works continually to improve Product's quality and reliability, Product can malfunction or fail. Customers are responsible for complying with safety standards and for providing adequate designs and safeguards for their hardware, software and systems which minimize risk and avoid situations in which a malfunction or failure of Product could cause loss of human life, bodily injury or damage to property, including data loss or corruption. Before customers use the Product, create designs including the Product, or incorporate the Product into their own applications, customers must also refer to and comply with (a) the latest versions of all relevant TOSHIBA information, including without limitation, this document, the specifications, the data sheets and application notes for Product and the precautions and conditions set forth in the "TOSHIBA Semiconductor Reliability Handbook" and (b) the instructions for the application with which the Product will be used with or for. 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Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. TOSHIBA assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations. 6 2012-04-13