
CFMA
AM CERAMIC FILTERS WITH MATCHING COIL
August 2005
 2005 TOKO America, Inc.
All Rights Reserved  
Printed in USA
1
CF-319-CFMA
R-LOG0805A
Dimensions 
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, 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.
Frequency Response
Typical Characteristics
Description
 AM IF filters combining matching coil with 
  CFM2 type in resin case
 Center frequency range: 450 — 470kHz
 Bandwidth at 6dB: 2 — 11kHz
Features
 Can be preset if required
 High selectivity, suited to a wide range of applications
 Low temperature coefficient
 Low spurious response
 Lead-free terminations 
Applications
 AM radio-cassettes, AM stereo application sets
 Wireless data communication equipment 
STANDARD FILTERS SELECTION GUIDE 
Frequency (kHz)
TYPE CFMA (CERASIZER
/Triple-tuned)
TOKO               Center              Bandwidth          Selectivity              Ripple                 Input Level              
         Part              Frequency              at 6dB            at Fo±9KHz       in Pass Band            for 0.6mV            Note
        Number                (kHz)                    (kHz)                    (dB)
(dB)                  Output (dB)              
  ##CFMA-027         450±1.5                5.0 min.              25.0 min.              1.0 max.                 78.5±3.0
  ##CFMA-003         455±2.5                5.0 min.              25.0 min.              1.0 max.                 78.5±3.0
     ##CFMA-050         459±1.5                5.0 min.              25.0 min.              1.0 max.                 78.5±3.0
     ##CFMA-012         460±2.5                5.0 min.              25.0 min.              1.5 max.                 78.5±3.0
     ##CFMA-008         468±2.5                5.0 min.              25.0 min.              1.0 max.                 78.5±3.0
   ##PCFMA-221      450±1.0                9.5 min.              17.0 min.              0.7 max.                 87.0±3.0    For AM stereo  
                                                                                                                                                                            application
Unit: mm
CFMA-027
Test Circuit  
A