TODX298
FIBER OPTIC TRANSCEIVING MODULE
TODX298
FIBER OPTIC TRANSCEIVING
MODULE WITH ANALOG OUTPUT
TO MONITOR OPTICAL FLUX FOR
DUPLEX DIGITAL SIGNAL
TRANSMISSION
l
Data rate: DC to 8 Mb / s (NRZ code)
l
Transmission distance: Up to 1000 m
l
TTL interface
l
LED is driven by Differential cuicuit.
l
ATC (Automatic Threshold Control) circuit is
used for stabilized output at wide range of
optical power level.
l
No need to change a resistor according to
transmission distance.
Unit: mm
1. Maximum Ratings
(Ta = 25°C)
Characteristics
Storage Temperature
Operating Temperature
Supply Voltage
Input Voltage
High Level Output Current
Low Level Output Current
Soldering Temperature
Symbol
T
stg
T
opr
V
CC
V
IN
I
OH
I
OL
T
sol
Ratings
−40
to 85
−40
to 85
−0.5
to 7
−0.5
to V
CC
+ 0.5
−1
20
260 (Note 1)
Unit
°C
°C
V
V
mA
mA
°C
Note 1: Soldering time
≤
3 s (More than 1 mm apart from the package).
Handling precaution: The LEDs used in this product contain GaAs (Gallium Arsenide).
Care must be taken to protect the safety of people and the environment when scrapping or
terminal processing.
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TODX298
2. Recommended Operating Conditions
Characteristics
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Load Resistance
Load Capacity
(Note 2)
(Note 2)
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
Min
4.75
2.0
0
―
―
―
―
Typ.
5.0
―
―
―
―
10
10
Max
5.25
V
CC
0.8
−60
1.2
―
―
Unit
V
V
V
µA
mA
kΩ
pF
Note 2: Load of analog output.
3. Electrical and Optical Characteristics
(Ta = 25°C, V
CC
= 5 V)
Characteristics
Data Rate
Transmission Distance
Pulse Width Distortion
Fiber Output Power
Maximum Receivable Power
Minimum Receivable Power
Current Consumption
(Note 5)
(Note 6)
(Note 7)
(Note 7)
∆tw
P
f
P
MAX
P
MIN
I
CC
Symbol
Test Condition
NRZ Code
Using PCF
Pulse width 125 ns
Pulse cycle 250 ns
C
L
= 10 pF
R = 1.2
Ω
8 Mb / s, Using PCF
8 Mb / s, Using PCF
R = 1.2 kΩ
P
IN
=
−14
dBm
Analog Output Voltage
(Note 8)
V
OA
P
IN
=
−29
dBm
P
IN
=
−∞
dBm
High Level Input Voltage
Low Level Input Voltage
High Level Output Voltage
Low Level Output Voltage
V
IH
V
IL
V
OH
V
OL
(Note 4)
(Note 4)
(Note 3)
(Note 4)
Min
DC
0.2
−42
−20
−14
―
―
3.4
1.3
1.0
2.0
―
4.6
―
Typ.
―
―
―
―
―
―
75
3.8
1.5
1.3
―
―
―
―
Max
8
1000
42
−14
―
−29
90
4.5
2.0
―
―
0.8
―
0.5
Unit
Mb / s
m
ns
dBm
dBm
dBm
mA
V
V
V
V
V
V
V
Note 3: 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 4: Plastic cladding silica fiber (200 / 300 µm).
Note 5: Between input of TODX298 and digital output of TODX298.
Note 6: Measure with a standard optical fiber with fiber optic connectors. Valued by peak.
−9
Note 7: BER
≤
10 , Valued by peak.
Note 8: When input signal DC.
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TODX298
4. Example of Typical Characteristics
Note 9: There give characteristic examples, and its values are not guaranteed.
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TODX298
Note 9: There give characteristic examples, and its values are not guaranteed.
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TODX298
Note 9: There give characteristic examples, and its values are not guaranteed.
5
2001-07-26
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