Page 1
Fiber Optic Transmitter
MOF-T3K4
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
Outline Dimensions
Recommended drilling as viewd from the soldering face
Absolute Maximum Ratings
Parameter
Supply voltage
Input voltage
Operating temperature
Storage temperature
Soldering temperature
*1 For 5s (2 times or less)
Unity Opto Technology Co., Ltd.
NOTES:
Tolerance is ±0.3mm unless otherwise noted.
A
=25
o
C
@ T
Symbol Rating Unit
V
cc
V
in
T
opr
T
stg
*1
T
sol
-0.5 to + 7.0 V
-0.5 to Vcc +0.5 V
-20 to +70
-40 to +70
260
o
o
o
C
C
C
REV : A2
09/20/2001
1/4
Page 2
Fiber Optic Transmitter
MOF-T3K4
Recommended Operating Conditions
Electro-Optical Characteristics
Parameter
MIN.
TYP.
MAX.
Unit
Pulse width distortion
∆
-25
---
+25
ns
REV : A2
09/20/2001
Parameter Symbol MIN. TYP. MAX. Unit
Operating supply voltage V
Operating transfer rate T --- --- 8 Mbps
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
cc
Symbol Conditions
λ
p
P
c
I
cc
V
iH
V
iL
t
pLH
t
pHL
tw
4.75 5.0 5.25 V
Refer to Fig. 1 -21 -18 -15 dBm
Refer to Fig. 2 --- 8 13 mA
Refer to Fig. 2 2.1 --- Vcc V
Refer to Fig. 2 --- --- 0.8 V
Refer to Fig. 3 --- 120 --- ns
Refer to Fig. 3 --- 120 --- ns
Refer to Fig. 3
630 660 690 nm
Unity Opto Technology Co., Ltd.
2/4
Page 3
Fiber Optic Transmitter
MOF-T3K4
Fig. 1 Measuring Method of Optical Output Coupling with Fiber
Fig. 2 Measuring Method of Intput Voltage and Supply Current
Input conditions and judgement method
09/202/2001
Conditions
REV : A2
Vin=0.8V or less
Pc<=-36dBm, Icc=13mA or less
D
Standard optical fiber cable
MOF-T3K4
Optical power meter
Unit to be measured
V
V
in
CC
GND
The optical power meter must be calibrated
to have the wavelength sensitivity of 660 nm.
( 0dBm=1mW )
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.
Standard optical fiber cable
MOF-T3K4
Unit to be measured
V
V
in
CC
GND
The optical power meter must be calibrated
to have the wavelength sensitivity of 660 nm.
( 0dBm=1mW )
V
I
in
cc
V
CC
Judgement method
Vin=2.1V or more
Note: Vcc=5.0V (State of operating)
-21dBm<=Pc<=-15dBm, Icc=13mA or less
Unity Opto Technology Co., Ltd.
3/4
Page 4
Fiber Optic Transmitter
MOF-T3K4
Fig.3 Measuring Method of Pulse Response
Standard optical fiber cable
Test item
∆tw∆
09/20/2001
Test condition
Unit to be measured
MOF-T3K4
V
CC
GND
V
in
Standard receiver
Output signal
Input
1 1 0 0
4 Mbps biphase
PRBS signal
V
CC
Standard receiver output
Oscilloscope
CH1
CH2
Input signal
t
PLH
50%
t
PHL
50%
Test item Symbol
Low →High pulse delay time
High →Low pulse delay time
Pulse width distortion
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 (State of operating)
(3) The probe for the oscilloscope must be more than 1M and less than 10pF.
Unity Opto Technology Co., Ltd.
t
Refer to the above prescriptions
PLH
t
Refer to the above prescriptions
PHL
tw=t
PHL
- t
PLH
4/4
REV : A2
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