Crystal Requirements for EZ-USB® HX2LP™ and HX2VL™ – KBA88957

Version: **

 

Question: What are the crystal requirements for EZ-USB® HX2LP™ (CY7C65620/CY7C65632/CY7C65640) and HX2VL™ (CY7C65632/CY7C65634/CY7C65642)?

 

Answer:

Here are the crystal requirements for CY7C65620/CY7C65630/CY7C65640B:

Frequency: 24 MHz
Operating Mode: Fundamental mode, parallel resonant
Frequency Stability: ±500 ppm
Series Resistance: ≤60 ohms
Load Capacitance: 12 pF
Drive Level: 500 μW

External load capacitors should be 12 pF. Frequently ±100 ppm crystals are recommended to use to improve the signal quality of the eye diagram.

Here are the crystal requirements for CY7C65632/CY7C65634/CY7C65642:

Frequency: 12 MHz
Operating Mode: Fundamental mode, parallel resonant
Frequency Stability: ±500 ppm
Load Capacitance: 20 pF
Drive Level: 600 μW

External load capacitors should be 20 pF. Frequently ±100 ppm crystals are recommended to use to improve the signal quality of the eye diagram.