obsolescence notice this product is obsolete. this information is available for your convenience only. for more information on zarlink?s obsolete products and replacement product lists, please visit http://products.zarlink.com/obsolete_products/
the SP4633 4 64 prescaler is one of gps range of high speed dividers for consumer frequency synthesis and measurement systems. it has a low supply current, giving reduced dissipation and operating temperatures in an 8-pin plastic dil package. spurious radiation has been reduced from all stages. the SP4633 incorporates a two-stage preamplifier which gives good low frequency sensitivity and prevents self-oscillation. features n does not self oscillate n low supply current n low radiation n input wideband amplifier n high input sensitivity n high input impedance n balanced ecl outputs n electrostatic protection ? ? esd precautions must be observed SP4633 1ghz 4 4 64 non self oscillating prescaler fig 1. pin connections - top view dp8 3058-2.2 fig. 2 SP4633 block diagram input 1 5v 1 2 3 4 8 7 6 5 0v ? output ? SP4633 1k v cc 1k differential input 2 3 output 0v 7 6 8 4 500 500 ? 2k 2k ? 4 64 1 7v 25v p-p 2 55 c to 1 150 c 0 c to 1 80 c absolute maximum ratings supply voltage, v cc input voltage storage temperature operating temperature range ordering information SP4633 na dp
2 SP4633 electrical characteristics these characteristics are guaranteed over the following conditions (unless otherwise stated): t amb = 0 c to 1 70 c, v cc = 45v to 55v (test circuit see fig. 3) 1 2 3 4 8 7 6 5 1n 1 5v 1n 180 hybrid coupler 180 01 m output 180 100n 100n 15p 15p ? 50 a 50 w signal generator b c d 50 w sampling scope 0v SP4633 fig. 3 test circuit 1 2 3 4 8 7 6 5 12p 1 5v 1n 180 01 m output 180 100n 100n 15p 15p ? 0v 100p 1 turn 1n uhf input vhf input ? from 50 w source fig. 4 application circuit SP4633 characteristic supply current, i cc input sensitivity 50mhz to 400mhz 600mhz 800mhz 1000mhz input overload input impedance output voltage, no load output voltage with load as fig. 3 output impedance output imbalance conditions value typ. max. min. units 45 5 75 10 15 ma mv mv mv mv mv w pf v p-p v p-p v v k w k w v 8 2,3 2,3 2,3 6 7 6 7 6 7 6,7 300 08 08 055 055 32 15 2 3 5 50 2 05 05 01 pin v cc = 1 5v rms sinewave (50 w system) 50mhz to 1ghz operating frequency see fig. 6 f in = 1ghz, v cc = 1 5v ? ? ? note the difference between the maximum input sensitivity and minimum overload voltage is the guaranteed dynamic range. input signal levels should be maintained within these limits at all frequencies.
3 SP4633 18 16 14 12 10 8 6 4 2 0 0 200 400 600 800 1000 120 0 frequency (mhz) v in (mv rms into 50 w ) typical device specification limit fig. 5 typical input sensitivity j 2 j 1 j 0.5 j 0.2 0 2 j 0.2 2 j 0.5 2 j 1 2 j 2 1 0.5 0.2 j 5 2 j 5 2 5 1000 200 60 400 600 800 fig. 6 typical input impedance (frequencies in mhz) s 11 z o = 50 w
4 SP4633 headquarters operations gec plessey semiconductors cheney manor, swindon, wiltshire sn2 2qw, united kingdom. tel: (0793) 518000 fax: (0793) 518411 gec plessey semiconductors p.o. box 660017 1500 green hills road, scotts valley, california 95067-0017, united states of america. tel: (408) 438 2900 fax: (408) 438 5576 customer service centres france & benelux les ulis cedex tel: (1) 64 46 23 45 tx: 602858f fax : (1) 64 46 06 07 germany munich tel: (089) 3609 06-0 tx: 523980 fax : (089) 3609 06-55 italy milan tel: (02) 66040867 fax: (02) 66040993 japan tokyo tel: (03) 3296-0281 fax: (03) 3296-0228 north america integrated circuits and microwave products scotts valley, usa tel (408) 438 2900 fax: (408) 438 7023. hybrid products, farmingdale, usa tel (516) 293 8686 fax: (516) 293 0061. south east asia singapore tel: (65) 3827708 fax: (65) 3828872 sweden stockholm, tel: 46 8 702 97 70 fax: 46 8 640 47 36 united kingdom & scandinavia swindon tel: (0793) 518510 tx: 444410 fax : (0793) 518582 these are supported by agents and distributors in major countries world-wide. gec plessey semiconductors 1993 publication no. ds3058 issue no. 2.2 may 1996 this publication is issued to provide information only which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. no warranty or guarantee express or implied is made regard ing the capability, performance or suitability of any product or service. the company reserves the right to alter without prior knowledge the specification, design or price of any product or service. information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. it is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. these products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. all products and materials are sold and services provided subject to the company's conditions of sale, w hich are available on request.
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