CY2545, CY2547: Quad PLL Programmable Spread Spectrum Clock Generator with Serial I2C Interface | 赛普拉斯半导体
CY2545, CY2547: Quad PLL Programmable Spread Spectrum Clock Generator with Serial I2C Interface
最近更新:
2017 年 11 月 14 日
版本:
*I
Quad PLL Programmable Spread Spectrum Clock Generator with Serial I2C Interface
特性
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Four fully integrated phase locked loops (PLLs)
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Input frequency range
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External crystal: 8 to 48 MHz
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External reference: 8 to 166 MHz clock
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Wide operating output frequency range
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3 to 166 MHz
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Serial programmable over 2-wire I2C interface
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Programmable spread spectrum with center and down spread option and Lexmark and Linear modulation profiles
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VDD supply voltage options:
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2.5V, 3.0V, and 3.3V for CY2545
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如需更多信息,请参阅 PDF 文档
概述
Four Configurable PLLs
The CY2545 and CY2547 have four I2C programmable PLLs available to generate output frequencies ranging from 3 to 166 MHz. The advantage of having four PLLs is that a single device generates up to four independent frequencies from a single crystal. Two sets of frequencies for each PLL can be programmed. This enables in system frequency switching using multifunction frequency select pin, FS.