LED
Red LED for optical link
L8045
Emitter for 50 Mbps optical link
L8045 is optical communication devices designed for POF (Plastic Optical Fiber) data links. L8045 is a highly reliable, high-
power LED that emits red light with a peak at 650 nm optimized for POF. A mini-lens is molded on the package for efficient coupling
to a POF. When used with our recommended driver circuit, a 50 Mbps transmitter can be configured at low cost.
Features
Applications
l
Peak wavelength: 650 nm
l
High reliability
l
High output
l
Designed to be used with S8046 or S7141-10
s
Absolute m axim um ratings (Ta=25 °C)
l
High-speed data transmission even under poor environmental
conditions with high noise
Parameter
Symbol
Value
Forward current
I
F
40
Reverse voltage
V
R
5
Power dissipation *
1
Pmax
250
Operating temperature
Topr
-40 to +85
Storage temperature
Tstg
-40 to +85
Soldering
-
230 °C, 5 s, at least 1.8 mm away from package surface
*1: Derate power dissipation at a rate of -1.75 mW /°C above Ta=25
°C
Unit
mA
V
mW
°C
°C
-
s
Electrical and optical characteristics (Ta=25 °C)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Data rate
fD
NRZ
DC
-
50
Mbps
Forward voltage
V
F
I
F
=20 mA
-
1.9
2.3
V
Reverse current
I
R
V
R
=5 V
-
-
10
µA
Peak wavelength
I
F
=20 mA
-
650
-
nm
λp
Spectral half width (FW HM)
I
F
=20 mA
-
20
-
nm
∆λ
Fiber-coupled optical output
Po
*
2
-13
-
-8
dBm
Rise time at pulse drive
tr
*
2
20 to 80 %
-
-
8
ns
2
Fall time at pulse drive
tf
* 80 to 20 %
-
-
8
ns
*
2
Pulse distortion
-3
-
+1
ns
∆T
Jitter
*
2
-
-
3
ns
∆tj
*2: Input is a pseudo-random bi-phase signal at 50 Mbps.
Average value (duty ratio 50 %) measured by using a plastic fiber of
φ1
mm. SI-POF and NA=0.5 (GH4001 made by
Mitsubishi Rayon).
Measured with the recommended driver circuit shown below. (Measurement conditions: Vcc=4.5 to 5.5 V, R1=750
Ω
,
R2=2.2 kΩ, R3=22
Ω,
C1=35 pF)
Vcc
Icc
4.7
m
F
1 14 74ACT08
3
2
7
R3
C1
R1
1
2
3
4
L8045
0.1
m
F
R2
SIGNAL INPUT
KLEDC0018EB
Note:
· A bypass capacitor (0.1 µF) and another capacitor (4.7 µF) are connected between Vcc and GND at a position within 3 mm from
the lead.
· The center of the optical fiber is aligned with the center of the lens on the package. The distance between the fiber end and the
lens is 0.1 mm.
1
Red LED for optical link
s
Dimensional outline (unit: mm)
5.2 ± 0.3
(INCLUDING BURR)
5.0
1.77
0.97
0.69
L8045
4.5 ± 0.3
(INCLUDING BURR)
1.4
10˚
4.3
1.8
10˚
(0.9)
0.25
CATHODE
CATHODE
ANODE
CATHODE
Tolerance unless otherwise
noted: ±0.1, ±0.2˚
Shaded area indicates burr.
Values in parentheses indicate
reference value.
KLEDA0086EA
0.5
0.4
(1.5)
(2.15)
1.27 1.27 1.27
(SPECIFIED AT THE LEAD OUT)
(0.9)
10˚
(0.9)
10˚
5.0
6.6 ± 0.4
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2007 Hamamatsu Photonics K.K.
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Higashi-ku, Hamamatsu City, 435-8558 Japan, Telephone: (81) 053-434-3311, Fax: (81) 053-434-5184, www.hamamatsu.com
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: (1) 908-231-0960, Fax: (1) 908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 08152-3750, Fax: (49) 08152-2658
France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741
4.3
2
Cat. No. KLED1049E01
Apr. 2007 DN
Industrial Control Electronics
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