In addition, how to distinguish the position of the active crystal oscillator? As we mentioned above, the silk screen of the active crystal oscillator is usually distinguished by dots. The position of the silk screen point is the foot 1
Article source: http://Responsible editor: Guo Hua popularity: 9 publication time: 2014-10-31 14:13 [large, medium and small]
Nowadays, the advancement of electronic technology has made the plug-in crystal oscillator used in the past large-scale use, which has been replaced by a small, thin and thin patch crystal oscillator. Plug-in crystals, which are well known in the past, are generally 2-pin, but the patch crystals are different. Let's clarify the specifications of the patch crystal.
The patch crystal of 1, 2 feet must be a passive crystal.
The 2, 4 pin patch crystal may be a passive crystal oscillator, or it may be an active crystal oscillator.
3, the chip crystal above four feet must be the active crystal oscillator 4, the active crystal oscillator itself has a point 5 on the lower left foot, the common patch crystal oscillator specifications are 2.5*2.0mm, 3.2*2.5mm, 5.0*3.2mm , 6.0*3.5mm, 5.0*7.0mm
2-pin passive patch crystal oscillators are usually more common in ceramic surfaces. Of course, there are also metal surfaces, but in general, metal-based surfaces are mostly four-legged passive patch crystals.
When we use a patch crystal, we usually encounter the following situation. The four-leg patch crystal does not know how to distinguish the pin. In the case of a passive crystal in the case of four feet, only two feet are function feet, and the other two feet are suspended and do not need to be accessed. We call it 1 foot, 2 feet, 3 feet, 4 feet. Under normal circumstances, how to distinguish who is 1 foot and who is 2 feet. Here is a story to everyone.
Four-legged passive patch crystal oscillator, crystal oscillator manufacturers in order to make it easier for everyone to distinguish the pin. There is usually a gap in the foot, and the number in the clockwise direction is 1, 2, 3, and 4. The passive crystal pins 1 and 3 are grounded, and the 2 and 4 pins are non-functional. The following picture can be referred to.
In addition, how to distinguish the position of the active crystal oscillator? As we mentioned above, the silk screen of the active crystal oscillator is usually distinguished by dots. The position of the silk screen point is the foot 1, turned over and clockwise, the direction of the foot is clear.
The active crystal oscillator can be further divided into the following types: 1. Quartz oscillator. Most of the KDS crystal oscillator models start with DSO 2, the temperature compensation oscillator. Most of the KDS crystal oscillator models start with DSB, and the NDK crystal oscillator starts with NT. 3, voltage controlled oscillator. Most of the KDS crystal oscillator models start with DSV, and most of the NDK crystal oscillators start with NV. 4, voltage-controlled temperature-compensated oscillator. Most of the KDS crystal models start with DSA.
The above is the technical information for the specification of the patch crystal, if you need to collect our page. Next time will bring more exciting content to everyone.
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