Ceramic Devices

Hy-Q International supply a wide range of through-hole and surface mount Ceramic Devices

Through Hole Ceramic Resonators

Surface Mount Ceramic Resonators

Through Hole Ceramic Filters

Surface Mount Ceramic Filters

Ceramic Discriminators

Through Hole Ceramic Resonators

Resonator SeriesFrequency (MHz)DimensionsComplianceDatasheet (PDF)
ZTB Series190 kHz ~ 1.25 MHz13.5 x 14.7 x 3.8
ZTT Series2.0 ~ 40.010 x 12 x 5.0
ZTA Series2.0 ~ 40.010 x 12 x5.0
NOTE: These products are nearing end of life. Please contact our Sales Department

Surface Mount Ceramic Resonators

Resonator SeriesFrequency (MHz)DimensionsComplianceDatasheet (PDF)
ZTTCC2.0 ~ 50.07.4 x 3.4 x 1.8
ZTTCS2.0 ~ 50.04.7 x 4.1 x 1.6
ZTTCV2.0 ~ 50.03.7 x 3.1 x 1.2
ZTACC2.0 ~ 50.07.4 x 3.4 x 1.8
ZTACS2.0 ~ 50.04.7 x 4.1 x 1.6
ZTACV2.0 ~ 50.03.7 x 3.1 x 1.2

Through Hole Ceramic Filters

Filter SeriesFrequency (MHz)DimensionsComplianceDatasheet (PDF)
LTW33-450 Series450 kHz11.0 x 8.0 x 7.0
LTW33-455 Series455 kHz11.0 x 8.0 x 7.0
LTU 450xx 2 Series450 kHz8.0 x 7.0 x 8.0
LTU 455xx 2 Series455 kHz8.0 x 7.0 x 8.0
LTM 450xx U Series450 kHz6.5 x 6.5 x 6.3
LTM 455xx U Series455 kHz6.5 x 6.5 x 6.3
LTM 450xx W Series450 kHz9.5 x 6.4 x 6.3
LTM 455xx W Series455 kHz9.5 x 6.4 x 6.3
LTS 450xx W Series450 kHz11.0 x 7.0 x 7.5
LTS 455xx W Series455 kHz11.0 x 7.0 x 7.5

Surface Mount Ceramic Filters

Filter SeriesFrequency (MHz)DimensionsComplianceDatasheet (PDF)
LTUCG450 Series450 kHz6.0 x 6.5 x 4.0
LTUCG455 Series455 kHz6.0 x 6.5 x 4.0
LTUCS450 Series450 kHz5.6 x 6.5 x 3.0
LTUCS455 Series455 kHz5.6 x 6.5 x 3.0
LTUPC450_A Series450 kHz6.0 x 7.3 x 4.0
LTUPC455_A Series455 kHz6.0 x 7.3 x 4.0
LTUPC450_B Series450 kHz7.0 x 7.5 x 5.0
LTUPC455_B Series455 kHz7.0 x 7.5 x 5.0
LTWC450 Series450 kHz11.6 x 6.6 x 3.0
LTWC455 Series455 kHz11.6 x 6.6 x 3.0
LTCV10.7 Series10.77.0 x 3.0 x 1.5
LTCS10.7 Series10.73.45 x 3.1 x 1.4

Ceramic Discriminators

Discriminator SeriesFrequency (kHz)DimensionsComplianceDatasheet (PDF)
JTBM455CxxPlease contact our Sales Department for specifications and availability
Detailed information is also available by downloading our Ceramic Devices Product Guide
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Overview of Ceramic Devices

Ceramic Resonators

A Ceramic Resonator is sometimes referred to as a dielectric resonator. They are commonly used for timing devices which create a clock signal. This type of signal oscillates between a high and low state using a piece of piezoelectric ceramic, connected to two or more electrodes. A resonator can have a built in capacitor to help save space on a printed circuit board.

When connected in an electronic oscillating circuit, a ceramic resonator will vibrate, generating an oscillating signal with a specific frequency. Like the similar crystal oscillator, they’re used to generate a clock signal to control the timing in oscillating circuits.

The ceramic resonator utilizes a frequency within the electrical component but unlike the quartz crystal which has a frequency tolerance of 10~30 PPM , a ceramic resonator carries a 0.5% or 5,000 PPM frequency tolerance which is generally used in microprocessor applications where absolute stability is not important.

The properties and components of Ceramic Resonators make them particularly useful in a broad range of applications. They are mainly used as a source of a clock signal for microprocessors. Ceramic Resonators are ideal for applications where the precision of the frequency may not be so critical, such as microprocessors.
They’re also commonly used in:

• Communications equipment
• Automotive electronics
• TVs
• Medical/healthcare equipment
• Telephones
• Toys
• Personal computing
• VCR
• Household appliances
• Radios

Ceramic Filters

Ceramic filters are widely used in IF and RF band-pass filter applications for radio receivers and transmitters.

These RF & IF ceramic filters are low cost, generally easy to use and in many ways ideal for a host of applications where the performance and specification of a crystal filter is not needed.

RF & IF ceramic band-pass filters are manufactured from ceramics that exhibit the piezoelectric effect. These filters are available for lower frequencies, with centre frequencies typically being at 455kHz and frequencies of 10.7 MHz which is a standard IF for many FM broadcast receivers.

Having a lower Q level than quartz, the ceramic RF & IF filters have bandwidths that are typically measured between 0.05 and 20% of the operating frequency.

Ceramic Discriminators

The discriminator functions to convert the change of the frequency into audio frequency, an unique system of detection only used for FM broadcasting. The detection of FM wave is made through the circuit in which the relation between the frequency and the output voltage is linear. FM wave detection methods as known as ratio detection, Foster-Seeley detection, quadrature detection, differential peak detection, etc.

FM Wave Detection Methods
Ratio Detection

Ratio detection is the most popular method in use at present. The impedance characteristic of a ceramic resonator is designed into the circuit, then a coil as a detector is unnecessary. The fact is that adjustment is eliminated.

Quadrature Detection
This detection method was originally developed as a sound detector for TV sets, but recently it has become popular in the consumer market (FM tuners, car radios, etc.). The Quadrature Detection Method utilizes the phase characteristic.

An FM signal is supplied directly to one side of the multiplier’s input with an IC to the other side of the multiplier’s input an FM-IF signal, which is passed through the phase shifting circuit mainly composed of a tank circuit tuned to FM-IF, is applied. By taking advantage of the phase characteristic of the ceramic resonator as a discriminator, we can eliminate adjustment of the FM-IF circuit.

Differential Peak Detection
This detection method was developed by RCA as a sound detector for TV sets. The method has the following features.
– Can output at high levels.
– Can function with only 1 synchronous coil.
Non-linearities of synchronous characteristics compensate each other by applying rectified intermediate frequency voltage, as a result, linearity can be obtained.

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