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S2-LP 데이터시트(PDF) 13 Page - STMicroelectronics |
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S2-LP 데이터시트(HTML) 13 Page - STMicroelectronics |
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13 / 90 page ![]() S2-LP Typical application diagram and pin description DocID029944 Rev 1 13/90 Components SMPS ON SMPS OFF Description L3, L5, L6 X X RX balun/matching inductors XTAL X X Crystal 3.1 Pin diagram Figure 4: Pin diagram, 4 mm x 4 mm QFN24 package 3.2 Pin description Table 3: Pinout N. Pin name Pin type Description 1 VDD SMPS Power 1.8 V to 3.6 V analog power supply for SMPS only. 2 SMPS1 Analog out 1.1 V to 1.8 V SMPS regulator output to be externally filtered. 3 SMPS2 Analog in 1.1 V to 1.8 V SMPS voltage input after LC filtering applied to SMPS1 output. 4 XOUT Analog out Crystal oscillator output. Connect to an external crystal or leave floating if driving the XIN pin with an external clock source. 5 XIN Analog in Crystal oscillator input. Connect to an external crystal or to an external clock source. If using an external clock source, DC coupling with a minimum 0.2 VDC level is recommended and minimum AC amplitude of 400 mVpp (however, the instantaneous level at input cannot exceed the 0 – 1.4 V range). |
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