CY25245PVC Cypress Semiconductor Corporation., CY25245PVC Datasheet
CY25245PVC
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CY25245PVC Summary of contents
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Features • Cypress PREMIS™ SMARTSPREAD™ family offering • Generates an electromagnetic interference (EMI) optimized clocking signal at the output • Selectable output frequency range • Single 1.25%, 2.5%, 5%, or 10% down or center spread output • Integrated loop filter ...
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Pin Definitions Pin Name Pin No. Pin Type SSOUT 15 O Output Modulated Frequency. Frequency modulated copy of the input clock (SSON# asserted). REFOUT 20 O Non-modulated Output. This pin provides a copy of the reference frequency. This output will ...
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Table 2. Modulation Width Selection Table EMI Reduction Modulation Setting MW2 Minimum EMI Control Suggested Setting Alternate Setting Maximum EMI reduction Overview The CY25245 product is one of a series of devices in the Cypress PREMIS family. The PREMIS family ...
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Spread Spectrum Frequency Timing Generator The device generates a clock that is frequency modulated in order to increase the bandwidth that it occupies. By increasing the bandwidth of the fundamental and its harmonics, the ampli- tudes of the radiated electromagnetic ...
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Serial Data Interface The CY25245 features a two-pin, serial data interface that can be used to configure internal register settings that control particular device functions. Upon power-up, the CY25245 initializes with default register settings, therefore the use of this serial ...
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Table 5. Data Bytes 0–7 Serial Configuration Map Affected Pin Bit(s) Pin No. Pin Name Data Byte 0 7 – – (Reserved) 6 – – (Reserved) 5 – – (Reserved) 4 – – (Reserved) 3 – – (Reserved) 2 – ...
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Table 5. Data Bytes 0–7 Serial Configuration Map (continued) Affected Pin Bit(s) Pin No. Pin Name 1 10 SSON# Spread Spectrum 0 4 MW0 LSB of Modulation Width Selection Data Byte MW2 MSB of Modulation Width Selection ...
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Absolute Maximum Ratings Stresses greater than those listed in this table may cause permanent damage to the device. These represent a stress rating only. Operation of the device at these or any other condi- Parameter Voltage on ...
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... OD t Input Duty Cycle ID t Jitter, Cycle-to-cycle JCYC Ordering Information Ordering Code CY25245PVC 20-pin Plastic SSOP CY25245PVCT 20-pin Plastic SSOP —Tape and Reel Lead-free CY25245OXC 20-pin Plastic SSOP CY25245OXCT 20-pin Plastic SSOP —Tape and Reel Layout Example +3.3V Supply FB µF 0.005 µF ...
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... Package Drawing and Dimension 20-pin (5.3 mm) Shrunk Small Outline Package O20 PREMIS and SMARTSPREAD are trademarks of Cypress Semiconductor Corporation. All product and company names men- tioned in this document are the trademarks of their respective holders. Document #: 38-07124 Rev. *B © Cypress Semiconductor Corporation, 2005. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product ...
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Document History Page Document Title: CY25245 Frequency-multiplying, Peak-reducing EMI Solution Document Number: 38-07124 Issue REV. ECN NO. Date ** 109865 11/13/01 *A 122550 01/08/03 *B 318273 See ECN Document #: 38-07124 Rev. *B Orig. of Change Description of Change IKA ...