CERAMIC FILTERS MULTI-ELEMENT, RESIN MOLDED, HIGHLY SELECTIVE CFU/CFWS 455KHz The CFU 455 line of ceramic filters are 4-element devices connected in ladder form while the CFWS 455 line of ceramic filters contain 6-elements. These compact, highly selective filters are recommended for use in applications ranging from two-way radio to auxiliary filters in high class transceivers. (Also available in 450KHz version.) SPECIFICATIONS CFU 455KHz . . : Attenuation : . Nominal Center 6dB Bandwidth 40dB Bandwidth Ripple Insertion Loss Input/Output Part Number Frequency (KHz) (KHz) min. (KHz) max. wae) min (dB) max. KHz (dB) max. Impedance (Q) *CFU455B2 455 +2 +15 +30 27 3 (455 + 10) 4 1500 *CFU455C2 455 +2 +12.5 +24 27 4 (455 + 8) 4 1500 *CFU455D2 455 +15 +10 +20 27 (455 + 7) 4 1500 *CFU455E2 455 + 1.5 +75 +15 27 5 (455 + 5) 6 1500 *CFU455F2 455+ 1.5 +6 +125 27 .5 (455 + 4) 6 2000 *CFU455G2 455 + 1 +45 +10 25 5 (455 + 3.0) 6 2000 *CFU455H2 455 +1 +3 +9 25 8 (455 + 2.0) 6 2000 *CFU45512 455 +1 +2 +75 25 2 (455 + 1.5) 6 2000 CFU455HT 455 + 1 +3 +9 35 3 (455 + 2) 6 2000 CFU4551T 455 +1 +2 +75 35 2 (455 + 1.5) 6 2000 DIMENSIONS: mm CIRCUIT CHARACTERISTICS (8.0205: 20 +05 | fs ~ 0 y T Ry 1 30H | CFU CFU 8.0+05 1.5 max OU fe g .o ae, 4 ] \ \-455He = , C8201 Ft fy $.S.G. R, S99 [A53E2 ] \ | 4.0 : 0.5 | _ Rg RE 3 40 | ~] A 0.2 we a Voltmeter 5 N * I \ A\ WA 2.740.306 201 2 50h y 0.8+0.3 =e 0. 8 4 2. 7 Rg+R,=R,=Input/Output impedance 60 vi y V / tah ovo 1=INPUT 70 4. 3 0.3 Sealing JF 4 * Le 2-GROUND 420 440 460 480 500 lem] | 3-1.0D.. - Frequency (KHz) 3.3405 1.2405 SPECIFICATIONS CFWS 455KHz . . . Attenuation . . Nominal Center 6dB Bandwidth 40dB Bandwidth Ripple Insertion Loss Input/Output Part Number Frequency (KHz) (KHz) min. (KHz) max. rig) min (dB) max. KHz (dB) max. Impedance (Q) *CFWS455B 455 +15 +30 35 3 (455 + 10) 4 1500 *CFWS455C 455 412.5 +24 35 3 (455 + 8) 4 1500 *CFWS455D 455 +10 +20 35 3 (455 + 7) 4 1500 *CFWS455E 455 +75 +15 35 3 (455 + 5.0) 6 1500 *CFWS455F 455 +6 #12.5 35 3 (455 + 4} 6 2000 *CFWS455G 455 +4.5 +10 35 2 (455 + 3) 6 2000 CFWS455HT 455 +3 +9 60 2 (455 + 2) 6 2000 CFWS455IT 455 +2 +75 60 2 (455 + 1.5) 7 2000 DIMENSIONS: mm CIRCUIT CHARACTERISTICS }# 11.0+0.5-+| |70+0.5b+- 5 r x r 7.5205 sre 0 10 jCEWS ff \. cews 20hcews 02 -| | = 35205 [] | * SSG. & 30) 455E FUT ALA oo Re ge T 2640.3 0.6 RE 2 \ oe +08 4 Voltmeter & 50 S 2.9203 [re mF ri 2205 29 2328 Rg+R,=Ro=Input & Output Impedance * 60 Q V \ fA /| Sealing | a beta te. 4132] 1=INPUT 70 NV V ef Ee 43 #98 5 4.3 2,3,4=GROUND 420 440 460 480 500 I *5-1.00.,/ 20 S=OUTPUT Frequency (KHz) 2a20skee 20203 : * Available as standard through authorized Murata Electronics Distributors. *Note: For safety purposes, connect the output of filters to the IF amplifier through a DC blocking capacitor. Avoid applying a direct current to the output of ceramic filters. 29