AMIS-30585 Ver la hoja de datos (PDF) - ON Semiconductor

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AMIS-30585

S-FSK PLC Modem

ON Semiconductor 

AMIS-30585

Figure 5: Placement of the Capacitors and Crystal with Clock Signal Generated Internally

The crystal is a classical parallel resonance crystal of 24MHz. The values of the capacitors CX are given by the manufacturer of the

crystal. Typical value is 30pF. The crystal has to fulfill impedance characteristics specified in the AMIS-30585 data sheet. As an

oscillator is sensitive and precise, it is advised to put the crystal as close as possible on the board.

7.10 Pin 14: XOUT

XOUT is the analog output pin of the oscillator. When the clock signal is provided from an external generator, this output must be

floating. When working with a crystal, this pin cannot be used directly as clock output because no additional loading is allowed on the

pin (limited voltage swing).

7.11 Pin 15: VSS

VSS is the digital ground supply pin. This pin must be decoupled from the digital supply by a 100nF ±10 percent ceramic capacitor. It is

advised to put this capacitance as close as possible on the PCB.

7.12 Pin 16: VDD

VDD is the 3.3V digital supply pin. This pin must be connected to VSS by a decoupling capacitor (C_DEC) as explained for the pin 15.

Figure 6: Placement of Decoupling Capacitor

Rev. 2 | Page 8 of 23 | www.onsemi.com

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