TODX297A(F)
FIBER OPTIC TRANSCEIVING MODULE
TODX297A(F)
GENERAL-PURPOSE OPTICAL
TRANSCEIVING MODULE
Data rate: DC to 6 Mb / s (NRZ code)
Transmission distance: Up to 40 m
TTL interface
LED is driven by Differential circuit.
ATC (Automatic Threshold Control) circuit is
used for stabilized output at wide range of
optical power level.
No need to change a resistor according to
transmission distance.
650 nm LED
Ｒ½ＨＳ
Compliant
Unit: mm
1. Absolute Maximum Ratings
(Ta = 25°C)
Characteristics
Storage Temperature
Operating Temperature
Supply Voltage
Input Voltage
Low Level Output Current
High Level Output Current
Soldering Temperature
Symbol
T
stg
T
opr
V
CC
V
IN
I
OL
I
OH
T
sol
Rating
−40
to 85
−40
to 85
−0.5
to 7
−0.5
to V
CC
+ 0.5
20
−1
260 (Note 1)
Unit
°C
°C
V
V
mA
mA
°C
Note 1: Soldering time
≤
10 s (More than 1 mm apart from the package).
ＨＯＴ－００１９
1
2007-03-10
TODX297A(F)
2. Operating Ranges
Characteristics
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
Min
4.75
2.0
0
―
―
Typ.
5.0
―
―
―
―
Max
5.25
V
CC
0.8
−60
1.2
Unit
V
V
V
µA
mA
3. Electrical and Optical Characteristics
(Ta = 25°C, V
CC
= 5 V)
Characteristics
Data Rate
Transmission Distance
Symbol
Test Condition
NRZ Code (Note 2)
Using APF (Note 3) and
TODX297A(F)
∆tw
P
f
λ
p
(Note 6)
(Note 6)
P
MAX
P
MIN
I
CC
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
DC to 6 Mb / s, Using APF (Note 3)
DC to 6 Mb / s, Using APF (Note 3)
R = 5.6 kΩ
Using TODX297A(F)
Pulse width 165 ns
Pulse cycle 330 ns, C
L
= 10 pF
APF 1 m, R =5.6 kΩ (Note 5)
Min
DC
0.2
Typ.
―
―
Max
6
40
Unit
Mb / s
m
Pulse Width Distortion (Note 4)
Fiber Output Power
Peak Emission Wavelength
Maximum Receivable Power
Minimum Receivable Power
Current Consumption
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
High Level Output Voltage
Low Level Output Voltage
−55
−15
―
−9
―
―
2.0
―
―
―
4.6
―
―
―
650
―
―
35
―
―
―
―
―
―
55
−9
―
―
−28
65
―
0.8
20
−0.4
―
0.5
ns
dBm
nm
dBm
dBm
mA
V
V
µA
mA
V
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.
Note 3: All Plastic Fiber (980 / 1000 µm).
Note 4: Between input of TODX297A(F) and output of TODX297A(F).
Note 5: Measure with a standard optical fiber with fiber optic connectors. Valued by peak.
−9
Note 6: BER
≤
10 , Valued by peak.
2
2007-03-10
TODX297A(F)
4. Application Circuit
5.6k
Ω
0.1uF
Fiber Optic Connector
Type Name
F07 type Optical
Connector with
Polished Surface.
Transmission Distance
(m)
Resistor
(Ω)
0.2 to 40
5.6 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 absolite 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.
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.
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.
(2)
(3)
3
2007-03-10
TODX297A(F)
(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.
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.
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.
Fixing fiber optical transceiving module
Solder the fixed pin (pins 9 and 10) of fiber optic transceiving module TODX297A(F) to the printed circuit
board to fix the module to the board.
Shielding and wiring pattern of fiber optic transceiving modules
To shield, connect the fixed pins (pins 9 and 10) of fiber optic transceiving module TODX297A(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.
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.
Protective cap
When the TODX297A(F) is not in use, attach the protective cap.
Supply voltage
Use the supply voltage within the operating condition (V
CC
= 5 ± 0.25 V). Make sure that supply voltage does not exceed
the absolute maximum rating value of 7 V, even for an instant.
(5)
(6)
(7)
(8)
(9)
(10)
(11)
4
2007-03-10
TODX297A(F)
(12)
Input voltage
If a voltage exceeding the absolute maximum rating value (V
CC
+ 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.
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.
Soldering condition
(13)
(14)
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.
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.
(16)
RESTRICTIONS ON PRODUCT USE
•
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.
5
2007-03-10
京公网安备 11010802033920号
EEWORLD
