Infineon Technologies CY23S02SXI-1

Overview

CY23S02SXI-1 from Cypress Semiconductor is a Spread Aware™ zero-delay buffer and frequency multiplier IC with two LVCMOS outputs, 3.3 V/5 V dual-supply support, 20–133 MHz output frequency range, 90 ps typical jitter on OUT2, and 65 ps typical output-to-output skew. It implements external feedback for precise phase alignment in clock distribution networks requiring synchronization with spread-spectrum reference signals.

For engineers reviewing the CY23S02SXI-1 datasheet, CY23S02SXI-1 pinout, CY23S02SXI-1 application, or CY23S02SXI-1 equivalent, key selection criteria include Spread Spectrum Timing (SST) pass-through capability, configurable multiplication ratios (REF, 2×REF, 4×REF, 8×REF, 16×REF), external feedback path flexibility, and industrial temperature operation (–40 °C to +85 °C).

Technical Context

The CY23S02SXI-1 integrates a PLL-based architecture with external feedback via FBIN to achieve zero-delay clock distribution while preserving spread-spectrum modulation from the reference input (IN). Its Spread Aware™ design avoids filtering SSFTG content, eliminating tracking skew in EMI-sensitive systems.

It supports eight configuration modes via FS0/FS1 pins to generate independent multiplication factors on OUT1 and OUT2 - e.g., OUT1 = 4×REF / OUT2 = 2×REF - with deterministic phase relationships: connecting OUT2 to FBIN ensures rising-edge alignment between OUT2 and IN.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (150 mil), JEDEC MS-012AC compliant, body width 3.9 mm, lead pitch 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar zero-delay buffer and frequency multiplier applications.

Compared with IDT 8T49N241 and ON Semi NB3N502, the CY23S02SXI-1 uniquely combines external feedback-driven zero-delay operation, Spread Aware™ SSFTG compatibility, and user-configurable dual-output multiplication - making it the only option for industrial clock trees requiring both EMI compliance and board-level phase tuning.

Availability

CY23S02SXI-1 is available at Aetrix Electronics and suitable for industrial motor control, FPGA-based data acquisition, EMI-sensitive networking equipment, and multi-processor synchronization requiring stable component supply and long-term lifecycle support.

Supply support for CY23S02SXI-1 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) designs high-performance timing, memory, and programmable logic solutions for industrial, automotive, and communications markets.

The CY23S02 product line delivers Spread Aware™ zero-delay clock buffers targeting EMI-constrained systems needing precise phase alignment without sacrificing spread-spectrum benefits.

FAQ

What is the purpose of the FBIN pin, and how must it be connected?

The FBIN pin receives external feedback from either OUT1 or OUT2 to close the internal PLL loop. For guaranteed 0° phase alignment between OUT2 and IN, connect OUT2 to FBIN. Trace length from OUT2 to FBIN must match the longest trace from OUT1/OUT2 to their respective loads to achieve true zero-delay operation.

Can CY23S02SXI-1 operate with a spread-spectrum clock input?

Yes - its Spread Aware™ architecture preserves spread-spectrum modulation from the IN pin through to both outputs. Unlike conventional zero-delay buffers, it does not filter or attenuate the modulation sidebands, preventing tracking skew that causes timing violations in synchronized multi-chip systems.

How do FS0 and FS1 pins determine output frequencies?

FS0 and FS1 are binary-coded function select inputs that configure eight distinct multiplication modes. For example, FS0=0/FS1=1 sets OUT1 = REF and OUT2 = REF/2, while FS0=1/FS1=1 sets OUT1 = 16×REF and OUT2 = 8×REF. All combinations are defined in the Configuration Options table of the datasheet.

Is CY23S02SXI-1 pin-compatible with legacy Cypress devices?

Yes - it is a pin-compatible upgrade of the Cypress W42C70-01, addressing known issues including spread-spectrum tracking skew and improved jitter performance. No PCB redesign is required when migrating from W42C70-01 to CY23S02SXI-1 in existing industrial or networking hardware.