SP000063852 Broadcom

SFH551/1-1 and SFH551/1-1V Receiver with Digital Output Stage for Polymer Optical Fiber Applications Data Sheet Description Features The SFH551/1-1 receiver is a transimpedance amplifi er Bipolar IC with open-collector output with an integrated photodiode and TTL open-collector Digital output, full TTL compatible output stage. The active area of this detector combined Sensitive in visible and near IR range with the molded microlens gives an effi cient coupling from the end of the polymer optical fi ber. This receiver Transfer rate 5MBd enables data rates up to 5 MBd and works with the Avago Low switching threshold SFH757 transmitter diode. 2.2mm aperture holds standard 980/1000/2200m The SFH551/1-1 is fully DC coupled and therefore no plastic fi bers line code is needed. The internal Schmitt trigger ensures No fi ber stripping required stable output states over the whole dynamic range. If Molded microlens for effi cient coupling light with intensity above the threshold level is coupled into the SFH551/1-1, the electrical output will be logical low and vice versa. Plastic Direct Fiber Connector housing (V-housing) With noisefree Vcc and GND, an undefi ned output signal Locking screw attached to the connector is not possible. Nevertheless, the SFH551/1-1 must not Interference-free transmission by the light-tight be used without shielding from ambient light. If ambient housing light could reach the threshold level, the SFH551/1-1V component should be chosen. The plastic connector Transmitter and receiver can be positioned fl exibly housing of the SFH V-series shields the ambient light No cross talk perfectly. Auto insertable and wave solderable SFH series components are optimized for easy coupling. Supplied in tubes No fi ber stripping is required just insert the cut fi ber into the selected SFH component. Applications Ordering Information Household electronics Power electronics Optical networks Application Literature AN Description 5342 General information about the SFH series SFH551/1-1 SFH551/1-1V with Selection Guide and recommendations regarding System Planning and Mounting Type Ordering Code 5341 Information about Basic and Special Circuits for SFH551/1-1 SP000063860 Transmitter and Receiver of the SFH series SFH551/1-1V SP000063855SFH551/1-1 Functionality The transparent plastic package has an aperture where a The SFH551/1-1 photodiode is silicon based and directly 2.2 mm fi ber end can be inserted. This coupling method connected to a transimpedance amplifi er that works as is very easy and extremely cost-eff ective. a pre-amplifi er. A diff erential amplifi er is connected in series and works as a post-amplifi er. Its output is passed SFH551/1-1V to the internal Schmitt trigger that drives a bipolar NPN transistor. The data-out signal is from the collector of this The V-housing allows easy coupling of unconnectorized bipolar transistor. 2.2 mm polymer optical fi ber by an axial locking screw. The SFH551/1-1 receiver is a transimpedance amplifi er V CC with a TTL open-collector output stage, therefore a pull-up resistor of at least 330 is necessary (see Figure R pullup 1). To minimize interference a bypass capacitor (100 nF) Data-out must be placed near (distance 3 cm) the SFH551/1-1 ports. In critical applications a shorter distance is better. GND Figure 1. Equivalent circuit diagram (simplifi ed) Package Dimensions SFH551/1-1 view from A 8.6 surface not flat 0.5 7.65 4.6 A 1.5 5.3 24.5 12.2 Dimensions in mm SFH551/1-1V 24.0 9.0 13.5 DATA SFH551/1-1 component 0.55 0.5 0.6 locking screw 0.5 Vcc GND DATA 2.54 7.62 spacing 5.08 Dimensions in mm 2 3.5 Vcc GND DATA 0.5 0.55 0.55 4.625 2.275 4.8 8.8 2.54 2.54