Infineon Technologies CY22800KFXCT

Overview

CY22800KFXCT from Infineon Technologies (formerly Cypress) is a field-reprogrammable universal programmable clock generator (UPCG) with integrated PLL, spread spectrum modulation, and VCXO capability. It delivers up to three low-jitter clock outputs (1–200 MHz commercial range), operates at 3.3 V, and supports crystal (8–30 MHz) or external clock (0.5–100 MHz) inputs - used in digital TV, STB, and PCI-based embedded systems for EMI reduction and frequency flexibility.

For engineers reviewing the CY22800KFXCT datasheet, CY22800KFXCT pinout, CY22800KFXCT application, or CY22800KFXCT equivalent, key selection criteria include spread-spectrum percentage configurability (±0.25% to ±2.0%), VCXO analog tuning range (±200 ppm), reprogrammability (up to 100 times), and 8-pin SOIC package compatibility with legacy clock synthesis designs.

Technical Context

The CY22800KFXCT implements a proprietary integer-N PLL architecture with on-chip VCO and output dividers, enabling precise frequency synthesis from a single reference. Its spread-spectrum engine modulates output frequency using preconfigured profiles (eight selectable spread percentages), reducing peak EMI by distributing energy across a bandwidth.

VCXO functionality is implemented via FS0/VCXO pin (Pin 3), accepting 0–3.3 V analog control to adjust output frequency within ±200 ppm of nominal - requiring a pullable crystal (e.g., 13.5 MHz or 27 MHz) for closed-loop tracking applications like MPEG-2 or HDTV timing synchronization.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (150 mil), surface-mount, JEDEC MS-012AC compliant, thermal resistance θ_JA = 140°C/W.

Key Features

Applications

Equivalent & Alternatives

Two verified alternatives exist for CY22800KFXCT: the Si5338A from Silicon Labs and the ICS843002AGI from Renesas. Both offer multi-output clock generation but differ in architecture and configuration method.

Compared with Si5338A and ICS843002AGI, CY22800KFXCT uniquely combines field reprogrammability, analog VCXO tuning, and eight spread-spectrum profiles in an 8-pin SOIC - making it optimal for EMI-constrained consumer electronics requiring design flexibility and broadcast-grade frequency tracking.

Availability

CY22800KFXCT is available at Aetrix Electronics and suitable for digital television, set-top box, and PCI-based embedded systems requiring stable component supply, long-term lifecycle support, and drop-in compatibility with legacy Cypress clock designs.

Supply support for CY22800KFXCT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, and industrial control ICs with strong heritage in timing solutions through its acquisition of Cypress Semiconductor.

CY22800KFXCT belongs to Infineon's programmable clock generator product line, designed specifically for EMI-sensitive consumer electronics and broadcast equipment requiring field-configurable, low-jitter, multi-output timing with analog VCXO tracking capability.

FAQ

What programming hardware is required to configure CY22800KFXCT?

The CY22800KFXCT is programmed exclusively using the Cypress CY36800 programmer dongle and associated ClockWizard software. This USB-connected tool writes configuration files (.cyd) to the device's internal EEPROM, supporting up to 100 reprogramming cycles. No external microcontroller or JTAG interface is needed - configuration is performed in-system or during board test.

Does CY22800KFXCT support differential output formats such as LVDS or HCSL?

No, CY22800KFXCT provides single-ended CMOS outputs only, with rail-to-rail swing referenced to VDD (3.3 V). It does not support LVDS, HCSL, or other differential signaling standards. Output drive strength is fixed at 8 mA typical, and termination must be handled externally using series resistors for impedance matching on PCB traces.

Can CY22800KFXCT generate non-integer frequency ratios, such as 24.576 MHz from a 27 MHz crystal?

Yes - CY22800KFXCT uses an integer-N PLL with programmable feedback and output dividers, enabling exact synthesis of non-harmonic frequencies like 24.576 MHz via appropriate multiplier/divider combinations. Configuration files for common audio clocks (e.g., 256fs, 384fs) are prevalidated and listed in the CY22800 Configurations table (Document 001-07704 Rev. *I, page 5).

Is the VCXO function active by default, or must it be enabled in configuration?

The VCXO function is enabled only when the device is configured in a VCXO-capable mode (e.g., CY22800-023A through -028A, -029A through -036A). In those configurations, Pin 3 (FS0/VCXO) becomes an analog input accepting 0–3.3 V. In non-VCXO configurations, the same pin serves as digital frequency select 0 - no analog tuning is possible unless the correct configuration file is loaded.