lfc/lfcm am ceramic filters august 2005 1 ? 2005 toko america, inc. all rights reserved printed in usa cf-317-lfc/m r-log0805a dimensions standard filters selection guide type lfc/lfcm toko center * bandwidth bandwidth attenuation insertion input/output part frequency at 6 db at 40 db fo 100 khz loss impedance number (khz) (khz) (khz) (db) (db) (k ) lfc alfc455h 4551.0 3.0 min. 9.0 min. 25.0 max. 6.0 max. 2.0 alfc455g 4551.0 4.5 min. 10.0 min. 25.0 max. 6.0 max. 2.0 alfc455f 4551.0 6.0 min. 12.5 min. 27.0 max. 6.0 max. 2.0 ALFC455E 4551.0 7.5 min. 15.0 min. 27.0 max. 6.0 max. 1.5 blfc455d 4552.0 10.0 min. 20.0 min. 27.0 max. 4.0 max. 1.5 blfc455c 4552.0 12.5 min. 24.0 min. 27.0 max. 4.0 max. 1.5 blfc455b 4552.0 15.0 min. 30.0 min. 27.0 max. 4.0 max. 1.5 lfcm alfcm455h 4551.0 3.0 min. 9.0 min. 25.0 max 6.0 max. 2.0 alfcm455g 4551.0 4.5 min. 10.0 min. 25.0 max 6.0 max. 2.0 alfcm455f 4551.0 6.0 min. 12.5 min. 27.0 max 6.0 max. 2.0 alfcm455e 4551.0 7.5 min. 15.0 min. 27.0 max 6.0 max. 1.5 blfcm455d 4552.0 10.0 min. 20.0 min. 27.0 max 4.0 max. 1.5 blfcm455c 4552.0 12.5 min. 24.0 min. 27.0 max 4.0 max. 1.5 blfcm455b 4552.0 15.0 min. 30.0 min. 27.0 max 4.0 max. 1.5 * for 450khz, substitute 450 for 455 in part number. description ? am ceramic flters are connected in a ladder structure and are available as either 4/6 element devices ? bandwidths from 6 to 30 khz features ? 450, 455 khz, (460khz and 486khz by special request) ? high selectivity ? compact package ? version with group delay variations specifed also available ? lead-free terminations applications ? am radio cassettes, am stereo sets ? cordless telephones, pagers ? two-way radios lfc lfcm unit: mm unit: mm
lfc/lfcm am ceramic filters august 2005 2 ? 2005 toko america, inc. all rights reserved printed in usa cf-317-lfc/m r-log0805a toko america, inc. 1250 feehanville drive, mount prospect, illinois 60056 tel: (847) 297-0070 fax: (847) 699-7864 web: http:// www.tokoam.com the information furnished by toko, inc. is believed to be accurate and reliable. however, toko reserves the right to make changes or improvements in the design, specifcation or manufacture of its products without further notice. toko does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. no license is granted by implication or otherwise under any patent or patent rights of toko, inc. frequency response lfc / lfcm (4 element) 415 attenuation (db) 425 435 445 455 465 475 485 100 80 60 495 40 20 0 frequency (khz) c e h bandwidth rank: c = 12.5khz e = 7.5khz h = 3khz z = rg + r1 =r2 e.v. 1 2 3 sg. 50 ? e1 r1 r2 e2 rg z = rg + r1 =r2 e.v. 1 2 3 sg. e1 r1 r2 e2 4 50 ? rg 1. c includes test circuit capacitance. 2. r 1 , r 2 : input-output impedance cs: stray capacitance (less than 50pf, including ev) lfc test circuit lfcm test circuit test circuit test conditions
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