1. scope this specification is applied to the ceramics filter used for am receiver . am ?? 2 . model name ?? 3. dimensions ? part name customer?s part number drawing no. ?? ??? ?? SFU455B gg-076 a unit : mm f c f b d g h a 7.0 0.3 b 9.0 0.3 c 5.0 1.0 d 0.9 0.1 f 2.5 0.2 g 0.15 0.03 h 3.6 0.3 (1) (2) (3) (1). input (2). ground (3). output sfu 455b e e 0.7 0.1 SFU455B ceramics filter
5. electrical characteristics ? note: 1. center frequency shall be define as the center value of the band at 3 db. 2. temperature coefficient of center frequency is based on the center frequency at 25 . item requirements ? ? 5-1 center frequency (fo) 462 2.0khz ?? 5-2 3 db bandwidth 10 3 khz 3db ? 5-3 slecetivity f0-9khz 6 db min ( ?) f0+9khz 4 db min 5-4 insertion loss 5.0 db max ? (at minimum loss point) 5-5 passband ripple 0 db ? 5-6 stop band attenuation 9 db min 5-7 withstanding voltage dc 50v ( ?? ) 5-8 temperature coefficient of center frequency 1.5khz max (-20~+80 ) 5-9 input/output impedance 3.0 k () SFU455B ceramics filter
4 test circuit ? parts shall be measured under a condition (temp.:3~35 . hum.:45~85%) unless any necessity to measure under a standard condition (temp.:20 + 2 . humi.:65 + 5%) is occurred. ?? 3-35? 45~85% ????? 20 + 2 ? 65 + 5% ? ? r1=r2=3.0k r g =r3=50 ( 1 ) ( 2 ) ( 3 ) ( 1 ) . in p ut ( 2 ) . ground ( 3 ) . out p ut r1 r g r2 rf volt meter s. s. g r3 SFU455B ceramics filter
6. physical and environmental characteristics ?? test item condition of test requirements ? ? 6-1 lead strength applied to vertical weight 1kg along with ?? the direction of lead without any shock no mechanical lead pulling for 5-10sec. damage and the ? 10 ??? 5-10 . measured val u es lead bending filter lead shall be subjected to withstand shall meet item against 90 bending its stem.this opration 5. shall be done toward both diretion. ( ?? 90 ?? ? 5 ? . 6-2 solderability dip the terminals of the filter no closer the solder s hall ?? than 1.5mm into a soldering bath(230+ 5) be for coat at for 5+ 1 sec . least 95% of the (refer to mil-std-202e-208c) terminal surface 1.5mm ??(230+ 5) 5+ 1 ?? 95% ) 6-3 vibration filter shall be measured after being ( ) applied vibration as below ??? no visible damage vibration freq: 10-55hz and the measured (? ) value shall meet amplitude : 1.5 mm table 1 ? ( ???? directions : 3 axial directions ? 3 time : 1 hour/each direction ?? 1 ?/ 6-4 random drop filter shall be measured after 3 times ? random dropping from the height of m. concrete floor. 3 ?????? 6-5 resistance to filter immersing the terminals up to 1.5 the measured soldering heat mm to filter?s body in soldering bath value shall meet ?? (350 + 10 ) for 3 sec., filter shall be table 1. measure after being placed in natural ( ? 1) condition for 1 hour. (350+ 10)?? 1.5mm ? 3 ?? 1 ?? SFU455B ceramics filter
6. physical and environmental characteristics ? ?? after test item condition of test requirements ? ? 6-7 humidity after being placed in a chamber (humi, ?? :90-95% rh temp.:40 + 2 ) for 100 hours filter shall be measured after placed in natural condition for 1 hour ( ? 90-95% ? 40 + 2 100 ? ? 1 ?? 6-8 life test after being placed in a chamber 85+ 2 high for 100 hours ,filter shall be temperature) measured after being placed in natural condition for 1 hour. ? 85+ 2 100 ?? 1 ?? 6-9 life test placed in a chamber (temp:-55+ 2 ) for the measured (low 100 hours,filter shall be measured placed value shall meet temperature) in natural condition for 1 hour . table 1. ( ?-552 100 ?? 1 ?? 1 ?? after temperature cycling of -55 (30 6 6-10 thermal shock minutes ) to +85 ( 30 minutes ) was ( ?? ) performed 5 times with a transfer time15 min filter shall be measured after being placed in natural condition for 1 hour. ?-5530 ?+8530 ?? 5 151, ? 1 ?? SFU455B ceramics filter
6. physical and environmental characteristics ? ?? item limit value ? ? center frequency + 1.0 kh z max ?? 3 db bandwidth + 1.0 khz max 3db ? insertion loss + 5.0 db max ? note: the limits in the above table are referenced to the initial measurements. ???? 7. notice ?? 7.1 ceremic filter should be stored in storeroom .and the surrouding atmosphere is acidless,alkali-free and no other harmful impurity. ( ????? .) 7.2 the package for ceramic filter should be avoid the hit by rain and snow,also the mechanical damage. ( ???????) 7.3 this specification limits the quality of the component as a single unit .please make sure that the component is evaluated and confirmed the drawing when it is mounted to your product. ??????????. table 1 ( 1) SFU455B ceramics filter
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