一、Characteristics
433.920 MHz SAW resonator (referred to as R433 resonator or SAW resonator) parameters -- the center frequency is 433.920 MHz; The frequency tolerance is ±75KHz; Package form is 3225, small insertion loss (≤1.2dB), high precision, temperature (working temperature: -25℃--+60℃; Storage temperature: -45℃--+85℃) Good characteristics, high integration, easy welding, good weldability, light weight, high stability, simple installation, small size, cheap price and so on.
R433 surface acoustic wave resonator plays a good role in suppressing high order harmonics, image information, transmission leakage signal and various parasitic clutter interference of electronic information equipment. R433 surface acoustic wave resonator can filter amplitude-frequency and phase-frequency characteristics with any desired accuracy, which is difficult to complete with other filters. The biggest drawback of the R433 surface acoustic wave resonator is that the bandwidth is too narrow (tens of KHZ), resulting in extremely slow download speeds.
R433 surface acoustic wave resonator
| Item | Minimum | Typical | Maximum | Unit |
| Center Frequency | 433.845 | 433.920 | 433.995 | MHz |
| Insertion Loss | - | 1.3 | 2.0 | dB |
| Quality Factor | Unloaded Q | - | 8848 | - | - |
| 50Ω Loaded Q | - | 1230 | - | - |
| Absolute Value during the First Year | - | ≤10 | - | ppm/y |
| DC Insulation Resistance between Any Two Pins | 1.0 | - | - | MΩ |
RF Equivalent RLC Model | Motional Resistance | - | 16.1 | 23 | Ω |
| Motional Inductance | - | 52.398 | - | µH |
| Motional Capacitance | - | 2.567 | - | fF |
| Pin 1 to Pin 2 Static Capacitance | - | 1.9 | - | pF |
| Typical | -40 | - | +85 | ℃ |
| Package style | SMD 3225 |
二、Package Dimension
Package Dimension
| Pin | Configuration |
| 1 | Input / Output |
| 3 | Output / Input |
| 2、4 | Case Ground |
三、Typical Frequency Response
Typical Frequency Response
四、Application & attention
◆ The center frequency of the R433 surface acoustic wave resonator (433.920MHz) is in a 50Ω test system, and the insertion loss of the resonator is measured to be 1.2dB at the test temperature of +25 ° C ±2 °C.
◆ Frequency aging refers to the change in the center frequency (433.920MHz) over time and is measured at +65 ° C (or above) for long periods of time. Typically, the degree of aging is highest in the first year after production and gradually decreases in subsequent years.
◆Target temperature refers to the temperature measured from the lowest frequency 433.845MHz to 433.920MHz and then to the highest frequency 433.950MHz。
◆ The nominal frequency at any temperature can be calculated by :f = f0 [1-FTC (T0-TC)*2].
R433 resonators are widely used in wireless alarms, remote control, smart door locks, wireless transmitter modules, wireless smart socket, wireless doorbell, wireless communication systems and remote transmitters. When used, the product should be stored in the ambient temperature of -10℃~40℃, the relative humidity is not more than 80%, the surrounding environment is not acidic, alkaline and other harmful gases in the warehouse. The welding temperature should not be too high, and the time should not be too long. If reflow welding is used, the reference temperature provided by the manufacturer is recommended, and wave crest welding is not recommended. Do not soak when cleaning, it is recommended to wipe with alcohol.
The company customized SMD SAW resonators, R433 sound meter resonators, R315 sound meter resonators, R320 sound meter resonators, SMD sound meter resonators for wireless emission modules, and various frequencies, various package sizes of the sound surface resonators.
