January 26, 2022

32.768K passive chip crystal oscillator practical knowledge

Introduction: With the development of semiconductor integration technology, the degree of integration of ICs is getting higher and higher, and the use of components on the surface of circuit boards is decreasing. The crystal in the circuit board is still one of the obvious electronic components that we have seen. The increase in the functions of various electronic devices, the high speed, low power consumption of semiconductor devices (low voltage drive), the miniaturization of electronic modules, and the increase in the number of interfaces, It is bound to cause electromagnetic interference in the electronic circuit. In order for the electronic circuit to work normally and stably, it is necessary to increase the external components to eliminate the electromagnetic noise and ensure the normal operation of the circuit. This has increased the demand for passive components.

32.768K passive chip crystal oscillator practical knowledge

The 32.768K crystal is a frequency commonly used in circuit boards. The clock module chip is placed inside the clock display electronic product. On this small clock module, there is a 32.768K crystal that determines the time and speed. The speed of time depends on our 32.768K crystal, so more often, professionals will call it a clock crystal. In a deeper sense, the parameters of the crystal oscillator are not only the frequency we see, but also the load capacitance, operating temperature, and of course, for the time display function, the more important is its own accuracy, which is the accuracy error. The size of the precision error at this time determines the source of the time error. If the precision error in the clock crystal is greater, the time error is greater, and vice versa.

With the development of semiconductor integration technology, the degree of integration of ICs is getting higher and higher, and the use of components on the surface of circuit boards is decreasing. The crystal in the circuit board is still one of the obvious electronic components that we have seen. The increase in the functions of various electronic devices, the high speed, low power consumption of semiconductor devices (low voltage drive), the miniaturization of electronic modules, and the increase in the number of interfaces, It is bound to cause electromagnetic interference in the electronic circuit. In order for the electronic circuit to work normally and stably, it is necessary to increase the external components to eliminate the electromagnetic noise and ensure the normal operation of the circuit. This has increased the demand for passive components. At the same time, while the control circuit board space is minimized, the external passive components also have strict requirements on the size. Ruitai Electronics is a professional crystal oscillator supplier. The company has many years of sales experience and market experience. During the customer research, we will provide all the related crystal information and market prospects for free, helping customers to choose more suitable for themselves Crystal oscillator solution. Therefore, there are many about 32.768K passive chip crystal oscillator package, this article, if you can easily collect future crystal oscillator selection reference Oh.

The 32.768K passive chip crystal oscillator package is composed of well-known crystal brands of well-known crystal brands and domestic crystal oscillator manufacturers. The package is roughly divided into 8 types, among which there are many large-size chip crystal oscillator packages. Currently, Ruitai offers cost-effective packages and The miniaturization of the package has two key points and the focus of the packaging that will be phased out. The 32.768K passive chip crystal reference package is released:

1, cost-effective 32.768K chip crystal oscillator package

The 3.2*1.5*0.8mm crystal oscillator package is the biggest demand for the clock crystal oscillator of the current clock module, namely, we call it 3215 SMD crystal, compared to the commonly used clock crystal package 7.0*1.5*1.4mm, not only on the space board. Half of the space is reduced, there is no significant difference in the price, the only difference is that the 3215 SMD crystal is soldered on two feet, and the 7015 SMD crystal is a four-legged solder. If you want to replace the crystal package, consider the foot. Bit design! There are roughly the following brands that can meet the 3.2*1.5*0.8mm SMD crystal package.

1 Epson Crystal: FC-135

2 Citizen Crystal: CM315

3 Seiko Jingzhen: SC-32S

4 Kyocera Crystal: ST3215SB

5KDS Crystal: DST310S

6 Dahe Jingzhen:TFX-02S

7NDK Crystal: NX3215SA

8TXC Crystal: 9HT10

9 Xi Hua Jingzhen: SF-3215

10 Taiyi Jingzhen: XD-3215

2, miniaturized 32.768K chip crystal oscillator package

2.0*1.2*0.3mm crystal oscillator package (abbreviated as 2012 SMD crystal oscillator) is the popular 3215 SMD crystal oscillator. At the same time, a small, ultra-thin chip crystal oscillator has rapidly emerged. The thickness is smaller than the 3215 SMD. Nearly 1/3, so customers with strict requirements on the thickness of passive components in the circuit board, this 2012 SMD crystal is a good choice. The crystal brands that satisfy this package are:

1 Epson Crystal: FC-12M/FC-12D

2 Citizen Crystal: CM2012H

3 Seiko Jingzhen: SC-20S

4 Kyocera Crystal: ST2012SB

5KDS Crystal: DST210AL

6 Dahe Jingzhen:TFX-03

7NDK Crystal: NX2012SA

8TXC Crystal: 9HT11

9 Xihua Crystal: SF-2012L

10 Taiyi Jingzhen: XD-2012

The 1.6*1.0*0.45mm crystal oscillator package (abbreviated as the 1610 SMD crystal oscillator), although the SMD crystal oscillator has a smaller body shape, the liquidity on the market is not as extensive as the 3215 SMD crystal oscillator and the 2012 SMT crystal oscillator. The crystal models that satisfy this package are:

1 Epson Crystal: FC1610AN

2 Seiko Jingzhen: SC-16S

3KDS crystal: DST1610AL/DST1610

4NDK Crystal: NX1610SA

5TXC Crystal: 9HT12

6 Xihua Crystal: SF-1610L

3, the crystal package that will be eliminated

10.41*4.06*3.6mm, 8.0*3.8*2.54mm, 7.1*3.3*1.5mm, 4.9*1.8*0.8mm, 4.2*1.5*0.8mm. In short, most of the crystal packages on the 3215 SMD package are about to be eliminated. Therefore, everyone in the crystal design selection phase of the crystal market must be clear to understand, in order to avoid follow-up to undergo a second design revision such as all trouble.

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