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PDF ( 数据手册 , 数据表 ) L8045

零件编号 L8045
描述 Red LED
制造商 Hamamatsu
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L8045 数据手册, 描述, 功能
LED
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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
l High-speed data transmission even under poor environmental
conditions with high noise
s Absolute m axim um ratings (Ta=25 °C)
Parameter
Symbol
Value
Forward current
IF
40
Reverse voltage
VR
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
VF IF=20 mA
- 1.9 2.3 V
Reverse current
IR VR=5 V
- - 10 µA
Peak wavelength
λp IF=20 mA
- 650 - nm
Spectral half width (FW HM)
Fiber-coupled optical output
∆λ IF=20 mA
Po *2
- 20
-13 -
- nm
-8 dBm
Rise time at pulse drive
tr *2 20 to 80 %
- - 8 ns
Fall time at pulse drive
tf *2 80 to 20 %
- - 8 ns
Pulse distortion
T *2
-3 - +1 ns
Jitter
tj *2
- - 3 ns
*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 ,
R2=2.2 k, R3=22 , C1=35 pF)
Vcc
Icc
SIGNAL INPUT
4.7 mF
1 14 74ACT08
23
7
R1
C1
0.1 mF R2
L8045
1
R3 2
3
4
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.
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