Infineon Technologies CY2XF24LXI702T

Overview

CY2XF24LXI702T from Cypress Semiconductor is a high-performance, I²C-programmable LVPECL crystal oscillator (XO) with integrated PLL, delivering differential clock outputs from 50 MHz to 690 MHz. It supports four independently programmable frequency words, <1 ps typical RMS phase jitter (12 kHz–20 MHz offset), and operates at 2.5 V or 3.3 V supply. Used for frequency margining in high-speed SerDes and memory interface validation.

For engineers reviewing the CY2XF24LXI702T datasheet, CY2XF24LXI702T pinout, CY2XF24LXI702T application, or CY2XF24LXI702T equivalent, key selection criteria include I²C-configurable multi-frequency switching, LVPECL output drive capability, RMS phase jitter performance below 1 ps, factory- or field-programmable configuration, and industrial-grade temperature operation up to 85°C.

Technical Context

The CY2XF24LXI702T implements a proprietary low-noise PLL architecture locked to an internal AT-cut quartz crystal, synthesizing output frequencies with 1 ppm resolution. Its I²C interface (7-bit address 0x69, 100 kbps max) enables dynamic selection among four preloaded frequency words stored in volatile memory.

Each frequency word occupies six contiguous registers (e.g., 0x10–0x15), and a dedicated select byte (0x40, bits [1:0]) determines active output. Frequency transitions are non-glitch-free and require PLL relock time; the device does not retain configuration across power cycles.

Key Specifications

Pinout & Package

6-pin leadless chip carrier (LCC) package, 5.0 × 3.2 mm footprint, RoHS-compliant, with exposed pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable LVPECL oscillator applications.

Compared with Si5338A-B-GM and ICS8430I-01LFT, the CY2XF24LXI702T uniquely balances single-LVPECL-output simplicity, field-programmable frequency margining, and industrial temperature support in a compact 6-pin LCC-making it optimal for targeted high-speed validation where configurability and footprint matter.

Availability

CY2XF24LXI702T is available at Aetrix Electronics and suitable for high-speed memory validation, SerDes margin testing, and industrial PLC timing requiring stable component supply and guaranteed long-term availability.

Supply support for CY2XF24LXI702T 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 CY2XF24 product line delivers high-stability, I²C-configurable clock generators optimized for frequency margining in high-speed digital systems-targeting design validation, manufacturing test, and industrial timing infrastructure.

FAQ

What is the default output frequency for CY2XF24LXI702T?

The CY2XF24LXI702T is factory-configured with a default output frequency of 702 MHz. This value is loaded into Frequency Word 0 (registers 0x10–0x15) and selected at power-on via the default value (00) in the Select Byte (0x40, bits [1:0]). The device retains this configuration until modified via I²C.

Does CY2XF24LXI702T retain its configuration after power cycling?

No. All frequency word and select byte configurations are stored in volatile memory. Upon power removal, the device resets to its factory-programmed state-specifically, Frequency Word 0 (702 MHz) is reloaded and selected. Persistent configuration requires external nonvolatile storage and host-initiated reprogramming at boot.

Can CY2XF24LXI702T generate frequencies in the 521–529 MHz or 596–617 MHz bands?

No. The CY2XF24LXI702T's PLL architecture has two forbidden frequency bands: 521–529 MHz and 596–617 MHz. Attempting to program values within these ranges results in undefined output behavior or failure to lock. These gaps are documented in the datasheet and enforced by CyClockWizard™ software.

What termination is required for the LVPECL outputs?

CY2XF24LXI702T's LVPECL outputs (CLK/CLK#) require AC-coupled 50 Ω termination to VDD − 2 V. For a 3.3 V supply, this means terminating each output to 1.3 V; for 2.5 V, terminate to 0.5 V. DC-coupled termination is not supported. Proper termination ensures signal integrity, minimizes reflections, and maintains specified jitter performance.