Infineon Technologies CY22050KFZXCT

Overview

CY22050KFZXCT from Cypress Semiconductor is a flash-programmable, single-PLL clock generator in 16-pin TSSOP, delivering up to six low-jitter outputs (8 kHz–200 MHz at 3.3 V) with programmable VDDL (2.5 V/3.3 V), 8–30 MHz crystal or 1–133 MHz driven reference input, and field-reprogrammability up to 100 times - used in networking and telecom timing subsystems.

For engineers reviewing the CY22050KFZXCT datasheet, CY22050KFZXCT pinout, CY22050KFZXCT application, or CY22050KFZXCT equivalent, key selection criteria include output voltage flexibility (2.5 V/3.3 V), PLL-based jitter control, crosspoint switch matrix routing, and JEDEC-file-based field programming via CyberClocks software.

Technical Context

The CY22050KFZXCT integrates a single analog PLL with programmable P/Q dividers and dual divider banks (Bank 1: /2, /3, /4, /DIV1N; Bank 2: /2, /4, /DIV2N), enabling precise frequency synthesis from either the PLL output or direct reference bypass. Its crosspoint switch matrix routes any of seven frequency sources-including REF, DIV1N, DIV2N, and fixed /2-/4-to each of six outputs.

It supports dual supply domains: AVDD/VDD = 3.3 V for core/analog circuitry and VDDL = 2.5 V or 3.3 V for four LCLK outputs, while CLK5/CLK6 are fixed at 3.3 V. Input load capacitance is digitally configurable via 8-bit register to match crystal CL (10–20 pF), eliminating external capacitors.

Key Specifications

Pinout & Package

16-pin TSSOP (JEDEC MO-153AC), 4.4 mm × 5.0 mm body, 0.65 mm pitch, exposed pad optional. Pin 1 marked by dot or bevelled corner.

Key Features

Applications

Equivalent & Alternatives

Cypress CY22050KFZXCT has two verified drop-in alternatives with documented functional trade-offs in industrial-grade clock generation applications.

Compared with IDT 5V41065APFGI and ON Semi NB3N3020BDR2G, CY22050KFZXCT uniquely balances field programmability, dual-voltage outputs, and crosspoint routing - making it optimal for prototyping, multi-scheme validation, and mixed-voltage system integration where configuration agility matters more than absolute jitter minimums.

Availability

CY22050KFZXCT is available at Aetrix Electronics and suitable for telecom infrastructure, industrial Ethernet switches, optical transceivers, and network-attached storage controllers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CY22050KFZXCT 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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable system-on-chip (PSoC), memory, and timing solutions for industrial, automotive, and communications markets.

The CY22050 belongs to Cypress's CyberClocks family of flash-programmable clock generators - designed specifically for applications demanding post-silicon frequency customization, mixed-voltage timing distribution, and rapid hardware iteration without board redesign.

FAQ

Can CY22050KFZXCT generate non-integer frequency ratios like 125.001 MHz?

Yes - the CY22050KFZXCT achieves fractional synthesis through integer-N PLL architecture with programmable P/Q dividers and post-dividers. For example, a 25 MHz crystal with P=50, Q=1, and /2 post-divider yields exactly 125 MHz. Non-integer values such as 125.001 MHz require external VCXO or higher-resolution synthesizers; CY22050 does not support fractional-N or delta-sigma modulation.

What is the maximum capacitive load supported on LCLK outputs?

The CY22050KFZXCT specifies a maximum load capacitance of 15 pF for both 2.5 V and 3.3 V operation, per the Recommended Operating Conditions table. Exceeding this value increases edge slew time and degrades jitter performance. Layout best practices include minimizing trace length, avoiding stubs, and using series termination if driving >15 pF loads.

Is XOUT required when using an external clock on XIN?

No - XOUT must be left floating when XIN is driven by an external clock source (1–133 MHz). The internal oscillator circuit is disabled in driven-clock mode, and connecting XOUT to any node may cause signal reflection or loading that affects input integrity. This requirement is explicitly stated in the Pin Definitions table on page 3 of the datasheet.

Does CY22050KFZXCT support spread-spectrum clocking (SSC)?

No - the CY22050KFZXCT does not implement spread-spectrum modulation. Its PLL is optimized for low-phase-noise, fixed-frequency synthesis. Spread-spectrum capability requires dedicated SSC control circuitry (e.g., modulated charge pump or VCO tuning), which is absent in this device. For EMI reduction, Cypress recommends proper PCB layout, power rail decoupling, and output load minimization instead.