SFH551/1
SFH551/1V
Semiconductor group page1 from 4 13.09.96
Integrated Photo Detector Receiver for Plastic Fiber
Plastic Connector Housing
Preliminary Data
Features
• Bipolar IC with open-collector output
• Digital output, TTL compatible
• Sensitive in visible and near IR range
• Low switching threshold
• Transfer rate ≤5 Mbitls
• 2,2 mm aperture holds standard 1000 micron plastic fiber
• No fiber stripping required
• Molded microlens for efficient coupling
Plastic Connector Housing
• Mounting screw attached to the connector
• Interference-free transmission from light-tight housing
• Transmitter and receiver can be flexibly positioned
• No cross talk
• Auto insertable and wave solderable
• Supplied in tubes
Applications
• Household electronics
• Power electronics
• Optical networks
• Medical instruments
• Automotive electronics
Type Ordering Code
SFH 551/1-1 Q62702P3180
SFH 551/1-2 Q62702P3218
SFH 551/1-1V Q62702P3181
SFH 551/1-2V Q62702P3219
SFH551/1
SFH551/1V
Semiconductor group page2 from 4 13.09.96
Block Diagram
Vcc
Data
Gnd
A bypass capacitor (100nF) near the device (distance≤3cm) is necessary between
ground and VCC.
Description
The SFH551/1V is a transimpedance amplifier with digital TTL open collector output
stage and integrated photodiode. The active area of the detector in connection with
the molded microlens gives an efficient coupling from the end of a plastic fiber.
The receiver is fully DC coupled and therefore no line code is needed.
The SFH551/1V includes a Schmitt trigger function to provide stable output states
over the whole dynamic range. With noise free Vcc and GND no undefined output
signal is possible
SFH551/1 must not be used without shielding the ambient light, because ambient
light causes malfunction when reaching the threshold level, noise or complete
switching the output. Interference free transmission is possible by using the
SFH551/1V with the black plastic connector housing.
Maximum Ratings
Parameter Symbol Values Unit
Operating Temperature Range TOP -40 to +85 °C
Storage Temperature Range TSTG -55 to +100 °C
Soldering Temperature
(2mm from case bottom t≤5s) TS260 °C
Supply Voltage Range without Damage VCC -0,5 to 15 V
Minimum Supply Voltage for Function VCCmin 4V
Minimum Pullup Resistance
(VCC =5V) Routmin 330 Ω
Output Voltage V0-0,5 to 15 V
Output Current I050 mA
Power Dissipation (output) P0100 mW
SFH551/1
SFH551/1V
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Characteristics (TA = 25°C, VCC = 4,75 to 5,25 V)
Parameter Symbol Values Unit
Maximum Photosensitivity Wavelength λSmax 700 nm
Photosensitivity Spectral Range
(S=80% Smax)λ600 to 780 nm
SFH 551/1-1 Optical threshold power (λ
=660nm) ΦINth ≤ 6
≤ - 22
µW
dBm
SFH 551/1-2 Optical threshold power (λ
=660nm) ΦINth ≤ 10
≤ -20
µW
dBm
Maximum optical power (λ=660nm)
maximum value of tpLH at maximum power !
ΦINL 1000
0
µW
dBm
Optical power for output high without errors
(λ=660nm)
ΦINH ≤0,1
≤ -40
µW
dBm
Propagation delay (optical input to electrical
output, with fast optical pulse) tPHL
tPLH
< 100
< 250
ns
ns
Current Consumption (without output current) Icc 4 mA
SFH551/1
SFH551/1V
Semiconductor group page4 from 4 13.09.96
Packages Outlines (dimensions in mm, unless otherwise specified)
SFH 551/1
SFH 551/1V
