Infineon/CYPRESS CY25200K-ZXC010A

The CY25200 is a programmable clock generator with spread spectrum capability. Spread spectrum modulates the output clock frequency over a small range, spreading the energy and reducing the energy peak. This is a powerful technique to reduce EMI in a variety of applications. It uses either an external reference clock or a crystal for an input. It also uses a PLL to generate a spread spectrum output clock that can be a different frequency than the input. Up to six output clocks are available and up to two of them can be REFCLKs (copies of the input clock, without spread). The CY25200 is highly configurable. Programmable variables include the input and output frequencies, spread percentage, center spread or down spread, and control pin functions. The oscillator pin capacitance can also be programmed to match the load capacitance requirement (C_L) of the crystal, eliminating the need for external capacitors. Available features include Output Enable, Power Down, Spread On/Off, Frequency Select, and the option to power some output clocks at 2.5V. The CY25200 is a Spread Spectrum Clock Generator (SSCG) IC used to reduce Electro Magnetic Interference (EMI) found in today’s high speed digital electronic systems. The device uses a proprietary Phase-Locked Loop (PLL) and Spread Spectrum Clock (SSC) technology to synthesize and modulate the frequency of the input clock. By frequency modulating the clock, the measured EMI at the fundamental and harmonic frequencies are reduced. This reduction in radiated energy significantly reduces the cost of complying with regulatory agency requirements (EMC) and improves time to market, without degrading system performance. The CY25200 uses a factory and field-programmable configuration memory array to synthesize output frequency, spread %, crystal load capacitor, clock control pins, PD#, and OE options. The spread % is factory and field-programmed to either center spread or down spread with various spread percentages. The range for center spread is from ±0.25% to ±2.50%. The range for down spread is from -0.5% to -5.0%. The input to the CY25200 is either a crystal or a clock signal. The input frequency range for crystals is 8 to 30 MHz and for clock signals is 8 to 166 MHz. The CY25200 has six clock outputs, SSCLK1 to SSCLK6. The frequency modulated SSCLK outputs are programmed from 3 to 200 MHz. The CY25200 products are available in a 16-pin TSSOP package with a commercial operating temperature range of 0 to 70°C. The CY25200 is programmed at the package level, and must be programmed prior to installation on a circuit board. Field programmable devices are denoted by an “F” in the ordering code, and are blank when shipped. The CY25200 is Flash technology based, which allows it to be reprogrammed up to 100 times. This allows for fast and easy design changes and product updates, and eliminates issues with old and out of date inventory.

• Wide Operating Output (SSCLK) Frequency Range: 3 to 200 MHz
• Programmable Spread Spectrum with Nominal 31.5 kHz modulation Frequency
• Center Spread: ±0.25% to ±2.5%
• Down Spread: -0.5% to -5.0%
• Input Frequency Range: External crystal: 8 to 30 MHz fundamental crystals; External reference: 8 to 166 MHz clock
• Integrated Phase-Locked Loop (PLL)
• Programmable Crystal Load Capacitor Tuning Array
• Low Cycle-to-Cycle Jitter
• 3.3V Operation with 2.5V Output Clock Drive Option
• Spread Spectrum On and Off Function
• Power Down or Output Enable Function
• Output Frequency Select Option
• Field-Programmable
• Package: 16 Pin TSSOP