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L10881 Datasheet Preview

L10881 Datasheet

Red LED

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L10881 pdf
Red LED for optical link
L10881
RC-LED for 156 Mbps POF communications
The L10881 is designed for high-speed POF (plastic optical ber) communications. The device is molded into miniature plastic
package with lens, allowing easy and efcient coupling to a POF.
Features
Red RC-LED for POF data link
Peak emission wavelength: 650 nm
(suitable for POF communications)
High-speed response: fc=70 MHz Typ.
High output power: Po=-2 dBm (IF=20 mA, φ1 mm, POF)
Designed to be used with the S7727
Applications
Plastic optical ber communications (FA, ofce machine,
home automation, LAN)
Data transmission in locations subject to high
electromagnetic noise
Absolute maximum ratings (Ta=25 °C)
Parameter
Symbol
Value
Forward current
IF
50 *1
Power dissipation
Pmax
130 *2
Operating temperature
Topr
0 to 60
Storage temperature
Tstg
-40 to +85
Soldering
- 230 °C, 5 s, at least 1.5 mm away from package surface
*1: Decreases at a rate of 0.57 mA/°C
*2: Power dissipation decreases at a rate of 1.7 mW/°C above Ta=25 °C
Forward current vs. ambient temperature
60
50
40
30
20
10
0
-10 0 10 20 30 40 50 60 70
Ambient temperature (°C)
KLEDB0340EA
Unit
mA
mW
°C
°C
-
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HAMAMATSU
HAMAMATSU

L10881 Datasheet Preview

L10881 Datasheet

Red LED

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L10881 pdf
Red LED for optical link
L10881
Electrical and optical characteristics (Ta=25 °C)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Forward voltage
VF IF=20 mA
- 1.9 2.4 V
Peak emission wavelength
Spectral half width (FWHM)
Fiber coupled optical power
λp IF=20 mA
Δλ IF=20 mA
Po *3
640 650 665 nm
- - 25 nm
-4.5
-2
+0.5
dBm
Pulse distortion
Cut-off frequency
ΔT *3
fc IF=20 mA ±1 mAp-p
-2.5
60
-
70
2.5 ns
- MHz
*3: Measured with the recommended driver circuit shown below.
Recommended driver circuit
Vcc Icc
0.1 mF
0.1 µF R2
SIGNAL INPUT
1 14 74ACT08
23
7
R1
C1
1 L10881(X)
2
3
4
KLEDC0047EA
Input is a pseudo-random bi-phase signal at 156 Mbps (NZR signal conversion).
Average value (duty ratio 50 %) measured by using a plastic ber of φ1 mm. SI-POF and NA=0.5 (GH4001 made by Mitsubishi Rayon).
Vcc=5.0 V, R1=100 Ω, R2=300 kΩ, C1=20 pF
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 ber is aligned with the center of the lens on the package. The distance between the ber end and the lens is 0.1 mm.
· When using optical bers with small core diameter, the ber-coupled optical output power may vary.
Emission spectrum
(Typ. Ta=25 °C, IF=20 mA)
120
100
80
60
40
20
0
600
620 640 660 680
Wavelength (nm)
700
KLEDB0321EA
Forward current vs. forward voltage
(Typ. Ta=25 °C, IF=20 mA)
50
40
30
20
10
0
0 0.5 1.0 1.5 2.0 2.5 3.0
Forward voltage (V)
KLEDB0322EA
2


Part Number L10881
Description Red LED
Maker HAMAMATSU
Total Page 3 Pages
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L10881 pdf
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