Fiber Optic Transmitter
Features
1.Uni-directional data transmission using plastic fiber
2.Signal transmission speed
:MAX. 8 Mbps (NRZ signal)
3.Operating voltage :4.75 to 5.25 V
4.TTL and high speed C-MOS LOGIC IC compatible
MOF-T3K5
Outline Dimensions
Recommended drilling as viewd from the soldering face
NOTES:
Tolerance is ±0.3mm unless otherwise noted.
Absolute Maximum Ratings
Parameter
Supply voltage
Input voltage
Operating temperature
Storage temperature
Soldering temperature
*1
*1 For 5s (2 times or less)
@TA=25
o
C
Symbol
V
cc
V
in
T
opr
T
stg
T
sol
Rating
-0.5 to + 7.0
-0.5 to Vcc +0.5
-20 to +70
-30 to +80
260
Unit
V
V
C
o
C
o
C
o
REV : A1
Unity Opto Technology Co., Ltd.
09/11/2001
1/4
Fiber Optic Transmitter
MOF-T3K5
Recommended Operating Conditions
Parameter
Operating supply voltage
Operating transfer rate
Symbol
V
cc
T
MIN.
4.75
---
TYP.
5.0
---
MAX.
5.25
8
Unit
V
Mbps
Electro-Optical Characteristics
Parameter
Peak emission wavelength
Optical power output coupling with fiber
Dissipation current
High level input voltage
Low level input voltage
Low
→High
delay time
High
→Low
delay time
Pulse width distortion
Symbol
λ
p
P
c
I
cc
V
iH
V
iL
t
pLH
t
pHL
∆
tw
Conditions
Refer to Fig. 1
Refer to Fig. 2
Refer to Fig. 2
Refer to Fig. 2
Refer to Fig. 3
Refer to Fig. 3
Refer to Fig. 3
MIN.
630
-21
---
2.1
---
---
---
-25
TYP.
660
-18
8
---
---
120
120
---
MAX.
690
-15
13
V
cc
0.8
---
---
+25
Unit
nm
dBm
mA
V
V
ns
ns
ns
REV : A1
Unity Opto Technology Co., Ltd.
09/11/2001
2/4
Fiber Optic Transmitter
MOF-T3K5
Fig. 1 Measuring Method of Optical Output Coupling with Fiber
Standard optical fiber cable
MOF-T3K5
Unit to be measured
V
in
V
CC
Optical power meter
GND
The optical power meter must be calibrated
to have the wavelength sensitivity of 660 nm.
( 0dBm=1mW )
D
V
CC
Notes (1)Vcc=5.0V (State of operating)
(2)To bundle up the standard fiber optic cable, make it into a loop with the diameter D=10cm or more.
Fig. 2 Measuring Method of Intput Voltage and Supply Current
Standard optical fiber cable
MOF-T3K5
Unit to be measured
V
in
V
CC
GND
The optical power meter must be calibrated
to have the wavelength sensitivity of 660 nm.
( 0dBm=1mW )
V
in
I
cc
V
CC
Input conditions and judgement method
Conditions
V
in
=2.1V or more
V
in
=0.8V or less
Note: V
cc
=5.0V (State of operating)
Judgement method
-21dBm<=Pc<=-15dBm, Icc=13mA or less
Pc<=-36dBm, Icc=13mA or less
REV : A1
Unity Opto Technology Co., Ltd.
09/11/2001
3/4
Fiber Optic Transmitter
MOF-T3K5
Fig.3 Measuring Method of Pulse Response
Standard optical fiber cable
MOF-T3K5
Unit to be measured
V
CC
V
in
GND
Standard receiver
Output signal
Oscilloscope
V
CC
CH1
CH2
Input
Input signal
1
1
0
0
50%
4Mbps biphase
PRBS signal
Standard receiver output
t
PLH
t
PHL
50%
Test item
Test item
Low
→High
pulse delay time
High
→Low
pulse delay time
Pulse width distortion
Symbol
Test condition
t
PLH
Refer to the above prescriptions
t
PHL
Refer to the above prescriptions
∆tw ∆tw=t
PHL
- t
PLH
Notes
(1) The waveform write time shall be 4 seconds. But do not allow the waveform to be distorted by increasing the brightness too much.
(2 ) Vcc=5.0 V (State of operating)
(3) The probe for the oscilloscope must be more than 1M and less than 10pF.
REV : A1
Unity Opto Technology Co., Ltd.
09/11/2001
4/4
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