1. scope the series saw filter 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: VSF45A1M 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 tem perature : 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 s torage temperature 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. - 40c ~ +70c reference temperature +25c 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 =25c item freq min typ max center frequency (center between 3db points) fo - 43.56 - mhz insertion attenuation reference level 43.56mhz 13.4 15.4 17.4 db 45.81mhz - 1.2 0.3 1.8 db 46.56mhz 2.9 4.4 5.9 db 42.23mhz - 1.7 - 0.2 1.3 db 41.31mhz - 1.7 - 0.2 1.3 db 39.81mhz 33.0 42.0 db 47.31mhz 32.0 42.0 db relative attenuation 51.31mhz 40.0 48.0 db 35.06~39.81mhz 31.0 db sidelobe 47.81~55.06mhz 34.0 db temperature coefficient - 72 ppm/k 3.3 environmental performance characteristics item test condition allowable change of absolute level 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) vi bration test 600- 3300rpm amplitude 1.5mm 3 directions 2 h each <1.0 drop test on ma ple 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 w eigh 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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