2002. 12. 23 1/2 saw filter technical data KF448BU specifications for saw filter revision no : 0 band pass filters for the receiving rf circuits of transceiver, keyless high stability and reliability with good performance and no adjustment. wide and sharp pass band characteristics. low insertion loss and deep stop band attenuation for interference. terminating impedance : 150 //0pf maximum ratings a b d e f c g 1.15 0.12 1.50 typ. 3.0 0.1 3.0 0.1 0.60 typ. 0.85 typ. 1.20 typ. dim millimeters function ground signal signal 1 pin no 3 6 4 2 5 sc-33 + _ + _ + _ a b c 6 5 4 3 d g g e f 2 1 electrical characteristics item symbol rating unit input signal level is max 0 dbm dc permissive voltage v dc +10 v operating temperature range t opr -30 +80 storage temperature range t stg -40 +85 items symbol test condition min. typ. max. unit nominal center frequency fo - - 448 - mhz bandwidth bw 3db - f o 1.0 - - mhz insertion loss il pass f o 1.0mhz - 2.0 4.0 db ripple level a rip f o 1.0mhz - 1.0 2.0 db f o -44.8 f o -40.8mhz 50 - - db f o +40.8 f o +44.8mhz 45 - - db input/output impedance z i (z o ) - - 150 //0pf - - k e n marking (sc-33) lot no.
2002. 12. 23 2/2 KF448BU revision no : 0 r s rr r l det ssg det ssg rr s r l i z 2 : input 1 , 3 , 4 , 6 : ground 5 : output z o i z z o r 6 5 4 3 2 1 r s , r l : 50 (internal impedance of source and load) r : 0 z i (z o )=r s (r l )+r measurement circuit r s , r l : 50 (internal impedance of source and load) r : 100 z i (z o )=r s (r l )+r reference level test circuit test circuit
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