L7140-10 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – Red LED/Photo IC for optical link

LED/PHOTO IC
Red LED/Photo IC for optical link
L7140-10/S7141-10
For 50 Mbps optical link
Features
L7140-10
l Peak emission wavelength: 650 nm
l High output power
l High-speed response
Applications
l Data transmission in FA or OA applications subject to large
amounts of electro magnetic noise
l High-speed, short distance data transmission
l Burst data transmission
S7141-10
l DC to 50 Mbps data transmission
l Miniature size due to monolithic IC structure
l Designed to be used with L7140-10
l Digital output
l Inversion logic
I Absolute maximum ratings (Ta=25 °C)
Parameter
Symbol
Value
Unit
L7140-10
Reverse voltage
Forward current
V4
I.
5
V
40
mA
S7141-10
Power supply
Output current
Vcc
Ioh
-0.5 to +7
10
V
mA
Power dissipation *
P
250
mW
Operating temperature
Topr
-10 to +70
°C
Storage temperature
Tstg
-40 to +85
°C
Soldering
-
230 °C, 5 s, at least 1.5 mm away from package surface
-
*1: Derate power dissipation at a rate of 1.75m W /°C above Ta=25 °C
I Electrical and optical characteristics (L7140-10) (Ta=25 °C)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Data rate
f, Driven by recommended circuit
DC
-
50
Forward voltage
V. I.=20 mA
-
1.9
2.3
Reverse current
I4
V4=5 V
-
-
10
Fiber coupled optical power
Po
I.=10 mA *
I.=20 mA *
-10
-
-
-7
-
-
Peak wavelength
lp I.=20 mA
-
650
-
Spectral half width (FW HM)
Dl I.=20 mA
-
20
-
Rise time at pulse drive
tr
I.=20 mA, driven by recommended circuit *^!
-
-
8
Fall time at pulse drive
tf
I.=20 mA, driven by recommended circuit *^!
-
-
8
*2: Output from a 1 meter long plastic fiber (GH4001 made by Mitsubishi Rayon) set close to the molded lens.
*3: Output optical waveform is defined by the waveform shown below.
I Drive circuit example
I Output optical waveform
definition
I L7140-10 output optical
waveform example
(R1=300 Ω, R2=750 Ω, C1=77 pF)
Vcc
0.1 mF
0.1 mF R2
Unit
Mbps
V
µA
dBm
nm
nm
ns
ns
80 %
20 %
SIGNAL INPUT
1 14 ^74ACT08 R1
2
3
7
C1
1 ^L7140-10
2
3
4
tr
tf
KLEDC0015EB
5 ns/div.
KLEDC0019EA
* This is merely an example of drive circuit and not for actual large-
volume production purposes.
KLEDC0014EB