MB88151APNF-G-400-JNE1

Clock Generators, PLLs, Frequency Synthesizers Overview

The CY88151A is a spread spectrum clock generator designed for EMI reduction. It attenuates radiation noise peaks by periodically modulating the oscillation frequency via an internal modulator. The device supports input frequencies from 16.6 MHz to 33.4 MHz with multiplication ratios of 1 or 2, yielding output ranges of 16.6–33.4 MHz or 33.2–66.8 MHz respectively. Modulation rates include ±0.5%, ±1.5% (center spread) and -1.0%, -3.0% (down spread). It features a built-in oscillation circuit for 16.6–33.4 MHz, cycle-cycle jitter under 100 ps, and operates on a 3.3 V ± 0.3 V supply within -40°C to +85°C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Provides center and down spread modulation profiles to reduce electromagnetic interference.
• Integrates an internal oscillator circuit eliminating external crystal requirements for supported frequencies.
• Utilizes a glitchless IDAC for precise modulation control.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Clock generation for PCI Express Gen 1 applications
• Ethernet interface clock sources
• General embedded systems requiring EMI mitigation

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific suffix codes against the manufacturer's ordering information to confirm package type, tape-and-reel configuration, and factory origin. Ensure the selected multiplier variant matches the required output frequency range for the target application design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the -100 suffix for multiply-by-1 operation or -200 for multiply-by-2 operation based on the desired output frequency. Configure SEL0 and SEL1 pins to set the required modulation rate and spread type. Ensure the ENS pin is managed correctly to enable or disable spreading as needed.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the CY88151A family of spread spectrum clock generators. It serves as a successor to the MB88151A series, maintaining functional compatibility while updating branding and documentation standards under Cypress Semiconductor and its subsequent corporate transitions.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The MB88151A is the direct predecessor part number. Verify that the legacy MB88151A variants match the required multiplication ratio and package style before substitution.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How is the modulation type determined?

The modulation type (center or down spread) and rate are configured using the logic levels on the SEL0 and SEL1 pins.

What is the maximum cycle-cycle jitter?

The cycle-cycle jitter is specified as less than 100 ps for both the -100 and -200 variants under typical conditions.

Can the device operate without an external resonator?

Yes, the device includes an internal oscillation circuit capable of generating frequencies between 16.6 MHz and 33.4 MHz.