BLFC455C

LFC/LFCM AM CERAMIC FILTERS Description • AM Ceramic filters are connected in a ladder structure and are available as either 4/6 element devices • Bandwidths from 6 to 30 kHz Dimensions Features • 450, 455 kHz, (460kHz and 486kHz by special request) • High selectivity • Compact package • Version with group delay variations specified also available • Lead-free terminations LFC Unit: mm Applications • AM radio cassettes, AM stereo sets • Cordless telephones, pagers • Two-way radios LFCM Unit: mm STANDARD FILTERS SELECTION GUIDE TYPE LFC/LFCM TOKO Part Number LFC ALFC455H ALFC455G ALFC455F ALFC455E BLFC455D BLFC455C BLFC455B LFCM ALFCM455H ALFCM455G ALFCM455F ALFCM455E BLFCM455D BLFCM455C BLFCM455B Center * Frequency (kHz) 455±1.0 455±1.0 455±1.0 455±1.0 455±2.0 455±2.0 455±2.0 455±1.0 455±1.0 455±1.0 455±1.0 455±2.0 455±2.0 455±2.0 Bandwidth at 6 dB (kHz) ±3.0 min. ±4.5 min. ±6.0 min. ±7.5 min. ±10.0 min. ±12.5 min. ±15.0 min. ±3.0 min. ±4.5 min. ±6.0 min. ±7.5 min. ±10.0 min. ±12.5 min. ±15.0 min. Bandwidth at 40 dB (kHz) ±9.0 min. ±10.0 min. ±12.5 min. ±15.0 min. ±20.0 min. ±24.0 min. ±30.0 min. ±9.0 min. ±10.0 min. ±12.5 min. ±15.0 min. ±20.0 min. ±24.0 min. ±30.0 min. Attenuation fo ± 100 KHz (dB) 25.0 max. 25.0 max. 27.0 max. 27.0 max. 27.0 max. 27.0 max. 27.0 max. 25.0 max 25.0 max 27.0 max 27.0 max 27.0 max 27.0 max 27.0 max Insertion Loss (dB) 6.0 max. 6.0 max. 6.0 max. 6.0 max. 4.0 max. 4.0 max. 4.0 max. 6.0 max. 6.0 max. 6.0 max. 6.0 max. 4.0 max. 4.0 max. 4.0 max. Input/Output Impedance (kΩ) 2.0 2.0 2.0 1.5 1.5 1.5 1.5 2.0 2.0 2.0 1.5 1.5 1.5 1.5 * For 450kHz, substitute 450 for 455 in part number. August 2005 © 2005 TOKO America, Inc. All Rights Reserved Printed in USA CF-317-LFC/M R-LOG0805A 1 LFC/LFCM AM CERAMIC FILTERS Frequency Response LFC / LFCM (4 element) 0 20 Attenuation (dB) 40 60 80 C E H Bandwidth Rank: C = ±12.5kHz E = ±7.5kHz H = ±3kHz 100 415 425 435 445 455 465 475 485 495 Frequency (kHz) Test Circuit Test Conditions 1. C includes test circuit capacitance. 2. R1, R2: Input-output impedance Cs: Stray capacitance (less than 50pF, including EV) LFC Test circuit R1 50Ω SG. Rg E1 1 3 2 R2 E2 E.V. Z = Rg + R1 =R2 LFCM Test circuit R1 50Ω SG. Rg 1 2 3 E1 4 R2 E2 E.V. Z = Rg + R1 =R2 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, specification 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. TOKO America, Inc. 1250 Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 Web: http://www.tokoam.com August 2005 © 2005 TOKO America, Inc. All Rights Reserved Printed in USA CF-317-LFC/M R-LOG0805A 2