LP5912-3.3DRVR_CSD87330Q3D Introduction

Among them, 42 150mm fabs and 24 200mm fabs were closed, while the number of closed 300mm fabs accounted for only 10% of the total. The details are shown in the figure below. According to IC Insights statistics, in the past 10 years (2009-2018), all 11-ball semiconductor manufacturers closed or rebuilt a total of 97 fabs. .

The TI BAW oscillator is an electronic oscillator circuit that utilizes the piezoelectric effect to generate a stable electronic signal through the mechanical resonance of a vibrating miniature acoustic resonator (BAW). This precise high-frequency signal provides a clock and timing reference for electronic systems.

LP5912-3.3DRVR_CSD87330Q3D

TPS74801DRCR

The most basic structure of the BAW filter is that two metal electrodes sandwich a piezoelectric film (the thickness of the Quartz substrate is 2um at 2GHz), and the acoustic wave oscillates in the piezoelectric film to form a standing wave.

In this case, BAW resonator technology offers TI a huge advantage by eliminating the need for external components mounted on the PCB. Today, timing often requires a quartz crystal. "Everyone uses quartz crystals for clocks," Solis said.

SN74HCS74QPWRQ1 BQ27200EVM TPD8F003DQDR LMC6082AIN/NOPB.

TPS22919DCKR CSD23381F4 CSD23280F3 LM76002RNPR LM76002RNPT.

LP5912-3.3DRVR_CSD87330Q3D

SN75LBC176DR

TPS65400RGZR TPS65400RGZT TPS92515QDGQRQ1 TPS92515QDGQTQ1 TPS560430XFDBVT.

BQ24311DSGR TIC10024QDCPRQ1 TL331IDBVR TL331IDBVT TPS63070RNMT.

UCC28063DR LM536003QDSXRQ1 UCC2892DR MSP430FR2111IPW16R UCC21520QDWRQ1.

TPS63060DSCR TPS63030DSKR TPS63060DSCT TPS63070RNMR TPS630701RNMR.

LP5912-3.3DRVR_CSD87330Q3D

There are also different structures where sound waves propagate as transverse waves. In the above-mentioned BAW-SMR and FBAR?filter diagrams, sound waves propagate in the form of longitudinal waves, that is, the direction of particle vibration and the direction of wave propagation are parallel.

The typical basic structure is shown in the figure (a) above, with the piezoelectric layer sandwiched between the upper and lower metal electrodes, the corresponding mBVD equivalent circuit is shown in the figure (b) above, and the corresponding impedance is shown in the figure (c) above. It can be seen that there are two resonance frequencies, series (fs) and parallel (fp). The working principle is as shown below.

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