Ceramic Filter,Trap,Discriminator

For more than two decades, piezo technology has been instrumental in the proliferation of solid state electronics. A view of the future reveals that even greater expectations will be placed on piezoelectric material in the area of new applications and for more stringent performance criteria in current products. Traditionally, nearly all low and high-end AM / FM commercial radios use piezo band-pass devices. However, applications are also found in cordless telephones, cellular systems, 2-way communications, and the television industry.

As a world leader in the development of piezo technology, Direct Electronics had been able to develop specialized piezo materials which when combined with an advance design have resulted in a complete line of practical, inexpensive piezo devices for entertainment and communications applications.

CERAMIC FILTER, TRAP, DISCRIMINATOR- Download Entire Piezoelectric Catalogue.

Ceramic Filter - FM Series

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(LT10.7M) for FM Receiver
Direct LT10.7M series are monolithic devices which utilize the energy-trapped thickness vibration-mode. This principle of operation is based upon the fact that an excellent resonating element with low spurious vibration can be obtained by adhering to certain theoretical parameters of design. These parameters include the physical dimensions of the peizo element, the electrode pattern, and the associated mass loading effect of the electrodes. (Compatible to Murata SFE10M7 FM-IF)
LT10.7M Series - PDF
(LT10.7M A10) Low Insertion Loss
The LT10.7M offers three series: LT10.7M for FM Receiver (Compatible Murata SFELF10M7), LT10.7M A10 Insertion Loss 2.5±2.0 db ~ 4.5±2.0 db (Compatible Murata SFELF10M7 A10), and LT10.7M Wide Band-width 950 kHz at 20dB/Narrow Band-width 95 kHz at 20dB (Compatible Murata SFELF10M7 DBS Receiver).
LT10.7M A10 Series - PDF
(LT10.7M) Wide/Narrow Band-Width
LT10.7M Narrow Band-width series features stable low spurious and temperature characteristics. This series is suitable for European car-audio or AM up conversion use that needs narrow band characteristics are stable. LT10.7M Wide Band-width series are specified to make up conventional filters which wider band characteristics not obtained.
LT10.7M Series - PDF
(LTCA/CV10.7M) Surface Mount
SMD LTCA/CV10.7M for AM (Compatible to Murata filter SFECV10M7) has been made smaller, thinner and in a chip configuration for surface mounting. The dimensions of LTCA/CV10.7M chip filter is small as 7.0±0.3 x 3.0±0.3 mm with low profile 1.5±0.2 mm. Insertion Loss max(dB) is from 3.0 db ~ 10 db, Spurious Attenuation (9~12 MHz) min(dB) 30 db ~ 35 db with Input/Output Impedance: 330Ω. Various bandwidths are available. Select a suitable type in accordance with the desired selectivity.
LTCA/CV10.7M Series - PDF
(LTCS10.7M) Surface Mount
Direct LTCS10.7M chip filter for FM-receiver utilizes the latest piezoelectric ceramic technology enabling the most cost-effective designs. The LTCS10.7M constructs with piezoelectric element which is connected in the sandwich shape by ceramics substrate. With a small mounting area (3.45±0.2 x 3.1±0.2 mm) and super thin profile (1.4 mm max.) enables flexible PCB design. Products conform to the RoHS directive.
LTCS10.7M Series - PDF

Ceramic Filter - TV/VCR Stage

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(LT MB) for 2 Channel Multi-Sound TV
Direct ceramic (LT MB) filters are a high selectivity filter for 2 channel multi-sound TV. Features with frequency adjustment-free, high performance and durability, and high selectivity. (Compatible to Murata Filter SFE MB series)
LT MB Series - PDF
(LTS MCB/MDB) Low Spurious
Direct ceramic low spurious for TV/VCR stage (LTS MCB/MDB) filters use thickness shear vibration mode and is compatible Murata SFSH MCB/MDB. Features with excellent spurious characteristics within Video Signal Band, and 3 types bandwidths prepared to respond customer requests. LTS MCB/MDB is suitable for Multiplex Sound TV in America.
LTS MCB/MDB Series - PDF
(LTT MA) High-Selectivity
Direct high-selectivity filters for TV/VCR stage (LTT MA) series is 4 element devices that offer more selectivity than the conventional LT series (Murata SFE). The improved spurious suppression of these filters eliminates the need for cascading multiple filtering devices; therefore, it is possible to design a more compact circuit board configuration.
LTT MA Series - PDF

Ceramic Filter - Communication

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(LT455/450 U/W) G.D.T. Characteristics
Direct ceramic (LT455/450 U/W) filters for communication are 4-element and 6-element devices connected in ladder form. These highly selective filters are designed to address the G.D.T. characteristics required in digital communications. The excellent G.D.T. characteristics allow these filters to be utilized in areas such as the mobile cellular markets as well as a variety of stereo applications. (Also available in 450kHz version.)
LT 455/450 U/W Series - PDF
(LTC455/450) Surface Mountable
Direct ceramic (LTC455/450) chip filters for communication (Compatible to Murata CFUCG series) comprises small, high performance, thin (4.0mm) consisting of 4 ceramic elements. Their innovative construction is perfect for shrinking mobile communication products such as pocket pagers and cellular phones. The surface mount LTC455/450 U/W series for AM use is one of the most recommendable intermediate filters, having such distinctive features as high selectivity, high stability and adjustment-free operation. Additionally its easy matching with IC helps create an easy circuit design.
LTC 455/450 Series - PDF
(LTM455/450) Miniature Versions
Ceramic (LTM455/450) Filters for Communication (Compatible to Murata Filter CFUM/WM 455/450 Series) are miniaturized versions of the Murata CFU/CFWS lines. These compact, highly selective characteristics are recommended for use in applications ranging from two-way radio to auxiliary filters in high class transceivers.
LTM 455/450 Series - PDF
(MLT) Miniature for AM
Ceramic (MLT) Miniature Filter for AM (Compatible to Murata Filter PFB Series) is one of the most recommendable intermediate filter, having such distinctive features as high selectivity, high stability and adjustment-free operation. Additionally its easy matching with IC helps create an easy circuit design such as applications in Electric synthesized tuners, HiFi audio systems, AM stereo demodulations, One-chip non-adjustment IC's, and even smaller, thinner set structure to cope with these diversifying for AM receiver.
LT Miniature Series - PDF
(LTA) for Radio Cassette Recorder
Ceramic (LT465A) Filter for Radio-Cassette Recorder are designed to address the needs of standard radio cassette recorder requirements. Recommend for use in low cost products where economically, efficient designs are critical. The nominal frequency tolerance is ±2KHz.
LT465A Series - PDF
(LTB) Shrinking Mobile Communication
Ceramic (LTB) Filter for Communication comprises small, high performance. Their innovative construction is perfect for shrinking mobile communication products such as pocket pagers and cellular phones.
LTB Series - PDF
(LTP) for Standard AM Filtering
Ceramic (LTP) filter for AM (Compatible to Murata Filter SFU450/455kHz ) are designed to address the needs of standard AM filtering requirements. These filters are recommended for use in low cost products where economically, efficient designs are critical.
LTP Series - PDF
(LTZ) for AM
Ceramic (LTZ) Filter AM (Compatible to Murata Filter SFZ Series) are designed to address the needs of standard AM filtering requirements. With dimensions (7.0 x 9.0 x 6.5mm), and Insertion Loss 7db, the (LTZ) series is composition of 2 elements direct coupling. Center Frequency (fo) is available in a range of 450kHz ~ 470kHz. The nominal frequency tolerance is ±2kHz.
LTZ Series - PDF
(LZU) Search-Stop Signal Detection
Ceramic (LZU) Filter 450 kHz Search-Stop Signal Detection (Compatible to Murata Filter BFU Series) are specifically designed for signal detection circuitry used in applications such as that found in the search-stop functions of electronically tuned radios. The LZU series are narrow bandwidth filters. This filter is used in the application which detects the carrier peak with a narrow bandwidth amplifier, or an electronic tuner as a stop signal detector.
LZU Series - PDF

Ceramic Discriminators

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JTCV10.7M Chip Series
Direct JTCV10.7M For FM are resonated devices that offer adjustment free audio detection in both wide and narrow bandwidths. Direct takes advantages of chip ceramic discriminators which convert the changes in frequency into an audio signal via the various detection methods based on impedance or phase characteristics of piezoelectrics technology. The incorporation of piezoelectrics technology allows the product's function and feature set to be easily configured via surface mount installation.
Download JTCV10.7M Series PDF
JT10.7M Series - For FM
Direct JT10.7M For FM (Compatible to Murata Discriminator CDA 10.7) are resonated devices that offer adjustment free audio detection in both wide and narrow bandwidths. Discriminator can be customed designs and tighter tolerances available on request. Application of specific designs also available including different piezo band-pass devices and Q specifications adjusted to frequency requirements.
Download JT10.7M Series PDF
JTC Surface Mount Series - for Communication
Direct JTC for Communication (Compatible to Murata Discriminator CDBC) consists of wide band piezoelectric resonator. It is ideal for mobile communication equipments due to its small size and light weight. Direct chip discriminator JTC series is a central player in providing small low-cost low-power semiconductors to aid the deployment of communication products. The incorporation of piezoelectrics technology allows the product's function and feature set to be easily configured via surface mount installation.
Download JTC Series PDF
JTM Series - for Communication
Direct JTM for Communication (Compatible to Murata Discriminator CDB/CDBC/CDBM) consists of wide band piezoelectric resonator. It is ideal for mobile communication equipment due to its small size and light weight. Direct JTM including features with small in size and lightweight, realize non-adjustment in detection circuit, high sensitivity and stability, wide range of standard products are available for various ICs, operating temperature range: -20°C to +80°C and storage temperature range: -40°C to +85°C.
Download JTM Series PDF

Ceramic Trap For TV/VCR Stage

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(XT MB) Trap for TV/VCR Stage
Trap for TV/VCR Stage (Compatible to Murata Trap Filter TPS MB Series) are band reject type used for video and sound IF attenuation. Direct's Trap is employing piezoelectric technology's mechanical resonance, it is almost unaffected by the surrounding circuits, and its characteristics do not deviate when it is implanted in the printed circuit and no adjustment is required.
XT MB PDF
(XT MW) Ceramic Double Trap
XT MW Series (Compatible to Murata Trap Filter TPWA Series) consist of 2 wafers with 2 trap frequencies. Recommended for Multi standard set. Features with good performance of attenuation and space saving with 3-terminal type. Sound trap for TV set is one of the famous example of B. E. F. In TV set, video signal is used in picture amplitude circuit after video signal detection block, ceramic resonator is insert here and trap circuit is formed in order to eliminate sound signal involved in video signal.
XT MW PDF
(XT MT) Ceramic Triple Trap
XT MT Series (Compatible to Murata Trap Filter TPT Series ) consist of 3 wafers with 3 trap frequencies. Recommended for Multi standard sets. The characteristic of a three-terminal ceramic trap equals two two-terminal ceramic trap. Three-terminal ceramic trap has a monolith structure formed from 2 ceramic resonators.
XT MT PDF
(XT MJ) Trap for Chrominance Carrier
Trap for Chrominance Carrier (Compatible to Murata Trap Filter TPS MJ Series) are band reject device used for video and sound IF attenuation. Utilize Direct special piezoelectric materials, Direct's trap has a high Q compared with IFT and a high selectivity is obtained. It also has a remarkable frequency temperature coefficient, high selectivity and high stability.
XT MJ PDF