1. scope the s aw 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 s uch as tv and so on. 2.construction 2.1 dimension and materials type: BF43A1M 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.character istics standard atmospheric conditions unless otherwise specified , the standard rang of atmospheric conditions for making measurements and tests is as follows; ambient temperature : 15c to 35c 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. - 10c ~ +60c storage temperature rang storage temperature rang is the rang of ambient temperatu res at which the filter can be stored without damage. conditions are as specified elsewhere in these specifications. - 40c ~ +70c reference temperature +25c
3.1 maximum rating dc voltage vdc 12 v between any terminals ac voltage v pp 10 v between any terminals 3.2 electrical characteristics source impedance zs=50 ohm load impedance z l =2k ohm//3pf t a =25c item freq min typ max center frequency fo - 43.75 - mhz insertion attenuation reference level 43.81mhz 13.0 15.0 17.0 db b3db - 6.0 - mhz pass bandwidth b30db - 7.6 - mhz 41.28mhz - 1.3 0.2 1.7 db 46.34mhz - 1.2 0.3 1.8 db 40.81mhz 1.0 2.5 4.0 db 46.81mhz 1.3 2.8 4.3 db 40.31mhz 8.0 12.0 - db 47.31mhz 8.0 13.0 - db 39.81mhz 36.0 45 - db relative attenuation 47.81mhz 36.0 45 - db 35.06~39.81mhz 33.0 40 db sidelobe 47.81~55.06mhz 33.0 38 db temperature coefficient - 72 ppm/k 3.3 environmental performance characteristics item test condition allowable change of absolute l evel at center frequency(db) high temperature test 70c 1000h < 1.0 low temperature test - 40c 1000h < 1.0 h umidity test 40c 90- 95% 1000h < 1.0 thermal shock - 20c==25c==80c 20 cycle 30m 10m 30m < 1.0 solder temperature test sold temp.260c for 10 sec. < 1.0 soldering immerse the pins melt solder at 260c+5/- 0c 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 <1.0
3 directions 2 h each 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 level at center frequency(db) surge test between any two electrode <1.0 3.6 frequency response
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