features ?? bipolar ic with open-collector output ?? digital output, full ttl compatible ?? sensitive in visible and near ir range ?? transfer rate 5mbd ?? low switching threshold ?? 2.2mm aperture holds standard 980/1000/2200m plastic fi bers ?? no fi ber stripping required ?? molded microlens for effi cient coupling plastic direct fiber connector housing (v-housing) ?? locking screw attached to the connector ?? interference-free transmission by the light-tight housing ?? transmitter and receiver can be positioned fl exibly ?? no cross talk ?? auto insertable and wave solderable ?? supplied in tubes applications ? household electronics ? power electronics ? optical networks application literature an # description 5342 general information about the sfh series with selection guide and recommendations regarding system planning and mounting 5341 information about basic and special circuits for transmitter and receiver of the sfh series description the sfh551/1-1 receiver is a transimpedance amplifi er with an integrated photodiode and ttl open-collector output stage. the active area of this detector combined with the molded microlens gives an effi cient coupling from the end of the polymer optical fi ber. this receiver enables data rates up to 5 mbd and works with the avago sfh757 transmitter diode. the sfh551/1-1 is fully dc coupled and therefore no line code is needed. the internal schmitt trigger ensures stable output states over the whole dynamic range. if light with intensity above the threshold level is coupled into the sfh551/1-1, the electrical output will be logical low and vice versa. with noisefree vcc and gnd, an undefi ned output signal is not possible. nevertheless, the sfh551/1-1 must not be used without shielding from ambient light. if ambient light could reach the threshold level, the sfh551/1-1v component should be chosen. the plastic connector housing of the sfh v-series shields the ambient light perfectly. sfh series components are optimized for easy coupling. no fi ber stripping is required; just insert the cut fi ber into the selected sfh component. ordering information sfh551/1-1 and sfh551/1-1v receiver with digital output stage for polymer optical fiber applications data sheet sfh551/1-1 sfh551/1-1v type ordering code sfh551/1-1 sp000063860 sfh551/1-1v SP000063855
2 package dimensions sfh551/1-1 sfh551/1-1v figure 1. equivalent circuit diagram (simplifi ed) dimensions in mm dimensions in mm r pullup gnd data-out v cc sfh551/1-1 the transparent plastic package has an aperture where a 2.2 mm fi ber end can be inserted. this coupling method is very easy and extremely cost-eff ective. sfh551/1-1v the v-housing allows easy coupling of unconnectorized 2.2 mm polymer optical fi ber by an axial locking screw. the sfh551/1-1 receiver is a transimpedance amplifi er with a ttl open-collector output stage, therefore a pull-up resistor of at least 330 is necessary (see figure 1). to minimize interference a bypass capacitor (100 nf) must be placed near (distance 3 cm) the sfh551/1-1 ports. in critical applications a shorter distance is better. functionality the sfh551/1-1 photodiode is silicon based and directly connected to a transimpedance amplifi er that works as a pre-amplifi er. a diff erential amplifi er is connected in series and works as a post-amplifi er. its output is passed to the internal schmitt trigger that drives a bipolar npn transistor. the data-out signal is from the collector of this bipolar transistor. surface not flat 24.5 a 0.5 view from a 1.5 0.55 0.5 vcc gnd data 5.3 12.2 0.55 ? 2.275 8.6 7.65 4.6 ? 4.625 2.54 2.54 locking screw 24.0 13.5 3.5 spacing 0.5 ? 0.6 sfh551/1-1 component 9.0 data 0.55 8.8 4.8 0.5 vcc gnd data 2.54 5.08 7.62
3 technical data absolute maximum ratings parameter symbol min typ max unit notes figure operating temperature range t c -40 +85 c storage temperature range t stg -40 +100 c supply voltage range without damage v cc -0.5 15 v soldering temperature (2mm from case bottom, t5s) t s +260 c minimum supply voltage for function v cc min 4v minimum pullup resistance (vcc=5.0v) r outmin 330 1 output voltage v o -0.5 15 v output current i c 50 ma power dissipation (output) p o 100 mw electrostatic discharge voltage capability esd 2000 v 1 electrostatic discharge voltage capability esd 400 v 2 notes: 1. esd capability for all pins hbm(human body model) according jesd22-a114 2. esd capability for all pins mm (machine model) according jesd22-a115 package v-housing color sfh v-series components are color coded just like other avago fi ber optic components. the sfh757v transmitter has a white colored housing; the sfh250v and sfh551/1- 1v receiver components have a black colored housing. this prevents mistakes while making connections. product designation and date of manufacture are printed on the housing. package v-housing mounting pins sfh v-series components have two pins that are electri- cally isolated from the inner circuit. the pins are only designed for mounting the v-housing to the pcb surface. this helps increase stability, which is needed during fi xing the fi ber end by the axial locking screw. the retention force between the soldered mounting pins and the v-housing of the sfh component is about 20 n (with a vertical exertion of force). this is an approximate value. package v-housing axial locking screw components of the sfh v-series are equipped with an axial locking screw for easy coupling to the unconnec- torized 2.2 mm polymer optical fi ber. the force that is necessary to pull a jammed fi ber out of the v-housing is typically 50 n (with a torque of 15 cnm for tightening the locking screw). this is an approximate value that is very dependent on the fi ber and torque combination. package v-housing mounting pins package v-housing axial locking screw
4 characteristics (t a = -40c to +85c; vcc = 4.75v to 5.25v) unless otherwise specifi ed parameter symbol min typ* max unit notes figure maximum photosensitivity wavelength ? smax 700 nm photosensitivity spectral range (s=80% of smax) ? s 600 780 nm mean pof overdrive limit: maximum input ( ? = 650 nm) p in(max) 252 -6 1000 0 w dbm(mean) 5, 7, 8 4 peak pof sensitivity limit: minimum input for logic 0 ( ? = 650 nm) p in(l) 20 -17 6.3 -22 w dbm 4, 5 peak pof off state limit: maximum input for logic 1 ( ? = 650 nm) p in(h) 0.1 -40 w dbm 4, 5 propagation delay (input: pattern 1010, 5mbd) (optical input to electrical output) t phl t plh 120 270 ns ns 1, 6 1, 6 2,3,4 2,3,4 output voltage at logic 1 v oh vcc-0.6 vcc-0.3 v 3 output voltage at logic 0 v ol 0.2 0.6 v 3 switching times (input: pattern 1010, 5mbd) output rise time (10% - 90%) output fall time (90% - 10%) tr tf 14 4 30 15 ns ns 2, 3, 6 2, 3, 6 current consumption (input: pattern 1010, 5mbd) icc 8 14 20 ma 3, 6 current consumption (logic1, light off) icch 1.5 3.5 6.5 ma 3 current consumption (logic0, light on) iccl 13 17.5 23 ma 3 * typical value = mean value at ta=25c and vcc=5. 0v notes: 1. pwsfh_output = pwopt_input + (tplh C tphl); pw = pulse width 2. switching times increase with temperature 3. measured with recommended rpullup = 330 (see figure 1) 4. sensitivity increase with temperature 5. value dbm =10*log(value measured / 1mw) 6. limits valid for optical input power from -20dbm(mean) to -9dbm(mean) 7. dbm(peak) = dbm(mean) + 3db 8. pwd 170ns; input: pattern 1010, 5mbd pw*sfh_output = pw*opt_input + (tplh C tphl) pwd*= (tplh C tphl) *pw=pulse width, *pwd=pulse width distortion t phl t plh v ol v oh pw opt_input pw sfh_output optical input output sfh551/1-1 light off light on figure 2. typical corresponding optical input to electrical output signal
0 50 100 150 200 250 -28-26-24-22-20-18-16-14-12-10 -8 -6 propagation delay in ns optical input power in dbm (mean value) propagation delay t phl -40c t phl 25c t phl 85c -20 0 20 40 60 80 100 120 140 160 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 pulse width distortion in ns optical input power in dbm (mean value) pulse width distortion pwd at -40c pwd at 25c pwd at 85c t plh -40c t plh 25c t plh 85c figure 3. typical propagation delay, measured with pattern 1010 at 5 mbd figure 4. typical pulse width distortion, measured with pattern 1010 at 5 mbd for product information and a complete list of distributors, please go to our web site: www.avagotech.com avago, avago technologies, and the a logo are trademarks of avago technologies in the united states and other countries. data subject to change. copyright ? 2005-2011 avago technologies. all rights reserved. obsoletes av01-0713en av02-3033en - october 25, 2011
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