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  1. scope the saw filter series have broad line up products meeting all broadcast standard including ntsc,pal and secam systems. these filters are composed of two interdigital transducers on a single -crystal. piezoelectrical chip. they are used in electronic equipments such as tv and so on. 2.construction 2.1 dimension and materials type : BF46A1M 0: year(0,1,2,3,4,5,6,7,8,9) b:product in this quarter(a:1~3,b:4~6,c:7~9,d:10~12)
2.2. circuit construction, measurement circuit 3.characteristics standard atmospheric conditions unless otherwise specified , the standard rang of atmospheric conditions for making measurements and tests is as follows; ambient temperature : 15?? to 35?? relative humidity : 25% to 85% air pressure : 86kpa to 106kpa operating temperature rang operating temperature rang is the rang of ambient temperatures in which the filter can be operated continuously. - 10?? ~ +60?? storage tempera ture rang storage temperature rang is the rang of ambient temperatures at which the filter can be stored without damage. conditions are as specified elsewhere in these specifications. - 40?? ~ +70?? reference temperature +25?? 3.1 maximum rating dc voltage vdc 12 v between any terminals ac voltage vpp 10 v between any terminals
3.2 electrical characteristics source impedance zs=50|? load impedance z l =2k|?//3pf t a =25?? item freq min typ max center frequency (center between 3db points) fo - 46.59 - mhz insertion attenuation reference level 46.66mhz 12.3 14.3 16.3 db b 3db - 6.0 - mhz pass bandwidth b 30db - 7.6 - mhz 44.13mhz - 1.2 0.3 1.8 db 49.19mhz - 1.0 0.5 2.0 db 43.66mhz 0.9 2.7 4.5 db relative attenuation 49.66mhz 1.2 3.0 4.8 db 35.07~42.66mhz 35.0 42.0 - db sidelobe 52.66~55.07mhz 35.0 40.0 - db temperature coefficient - 72 ppm/k 3.3 environmental performance characteristics item test condition allowable change of absolut e level at center frequency(db) high temperature test 70?? 1000h < 1.0 low temperature test - 40?? 1000h < 1.0 h umidity test 40?? 90- 95% 1000h < 1.0 thermal shock - 20??==25??==80?? 20 cycle 30m 10m 30m < 1.0 solder temperature test sold temp.260?? for 10 sec. < 1.0 soldering immerse the pins melt solder at 260??+5/- 0?? for 5 sec. more then 95% of total area of the pins should be covered with solder 3.4 mechanical test item test condition allowable change of absolute level at center frequency(db) vibration test 600- 3300rpm amplitude 1.5mm 3 directions 2 h each <1.0 drop test on maple plate from 1 m high 3 times <1.0 lead pull test pull with 1 kg force for 30 seconds <1.0
lead bend test 90 o bending with 500g weigh 2 times <1.0 3.5 voltage discharge test item test condition allowable change of absolute leve l at center frequency(db) surge test between any two electrode <1.0 3.6 frequency response



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