"Big head" has its own big use - the past life of the 49U crystal

Introduction: The 49U crystal oscillator is the earliest mass production of DIP quartz crystal elements in the domestic market. It appears to be exceptionally lonely in today's small, thin, thin film market. Take a look at the dimensions and physical dimensions of the SMD3225. Compared with the map, you can see the difference between the two.

49U DIP crystal oscillator can produce a wide range of frequency coverage, and its commonly used frequency point covers the 1.000MHz --- 70.000MHz this interval, especially in the low frequency band 1.000MHz-6.000MHz, many packaged quartz crystal can not be produced. In addition to being bulky and requiring manual welding, it has all the features of his quartz crystals. Because its own characteristics run counter to the current trend, it has gradually been eliminated and replaced. But also because of its own characteristics, its market demand has been eroded, but it has not been completely replaced.

The following two examples illustrate its use:

49U 49.430MHz crystal has been used in large electronic toys. Because of its high frequency accuracy, small frequency temperature deviation, and small resistance, it has been loved by users for many years.

49.430M crystal

The 49U 1.8432MHz crystal is the lower frequency in quartz crystal components and is generally only available in the 49U crystal. This product is used by Northeast users in instrumentation, remote control. Having weathered the extreme cold weather in the winter in the north, it still works well.

49U 1.8432M

The 49U crystal is a “bulk” in the quartz crystal family. Although it has been out of favor for a long time in the market, it has not disappeared. The reason is that compared to

The "big head" product, "big head" has its own large-scale use, and has always been a soft spot for users in large-scale communications equipment medical equipment electric remote control products. Some low-frequency and high-frequency frequencies, and only this big product can be the only one.

Any product has its advantages and disadvantages. What package size crystal oscillator product is chosen is a difficult problem for designers. In the current situation where domestic manufacturing industry is struggling, the factory is cost-conscious and only cost-effective is the product's survival. The king.

Source: Hengyi (Hong Kong) Enterprise Co., Ltd.