CY25701FJXC

Overview

The CY25701FJXC is a programmable high-frequency crystal oscillator with spread spectrum (SSXO) and no-spread spectrum (XO) options. It operates at 3.3V with an output frequency range of 10–166 MHz. The device integrates a PLL for frequency synthesis and modulation, featuring a nominal 31.5-kHz modulation frequency. Spread percentages are configurable from ±0.25% to ±2.0% (center) or –0.5% to –4.0% (down). Typical cycle-to-cycle jitter is 85 ps at 133 MHz. It is housed in a 4-pin Plastic JE SMD package with an operating temperature range of –20°C to 70°C.

Feature Summary

• Programmable output frequency from 10 to 166 MHz using internal PLL
• Configurable spread spectrum: Center (±0.25% to ±2.0%) or Down (–0.5% to –4.0%)
• Integrated phase-locked loop with 31.5 kHz typical modulation frequency
• Output Enable function with asynchronous control

Applications

• PC systems for EMI reduction
• Consumer electronics requiring EMC compliance
• Networking applications

Procurement Notes

Verify the specific programming suffix assigned by Cypress after submitting frequency and spread percentage requirements. Confirm the package type matches the design, as the FJXC suffix indicates field-programmed units in the 4-lead Plastic JE SMD package. Ensure the operating temperature range of –20°C to 70°C aligns with system constraints.

Selection Notes

Select based on required output frequency within the 10–166 MHz range and desired spread spectrum profile. Choose center spread for symmetrical deviation or down spread for maximum peak frequency reduction. Verify load capacitance requirements (max 15 pF) and ensure supply voltage stability between 3.0V and 3.6V.

Part Context

This component belongs to the CY25701 series of programmable clock generators. The 'FJXC' suffix specifically denotes units programmed in the field by Cypress distributors, distinguishing them from factory-programmed variants. It replaces older ceramic packages with the 4-lead Plastic JE SMD form factor.

Replacement Considerations

Direct substitutes require matching the 4-pin JE SMD package and 3.3V operation. Verify that alternative oscillators support similar spread spectrum capabilities if EMI reduction is critical. Check compatibility with existing programming tools like the CY3672 kit for configuration.