Infineon Technologies CY2303SXI

Overview

CY2303SXI from Cypress Semiconductor is an industrial-temperature 3-output phase-aligned clock multiplier IC with on-chip PLL, supporting 1×, 2×, and 4× reference multiplication (10–41.67 MHz input → 10–166.67 MHz outputs), ±200 ps input-to-output skew, 200 ps output-to-output skew, and 80 ps typical period jitter at 3.3 V supply. It serves as a system clock distributor in telecom line cards and industrial control backplanes requiring deterministic timing alignment.

For engineers reviewing the CY2303SXI datasheet, CY2303SXI pinout, CY2303SXI application, or CY2303SXI equivalent, key selection criteria include guaranteed inter-device skew <400 ps, 5V-tolerant REFIN input, OE-controlled output enable, industrial-grade operating range (–40°C to +85°C), and SOIC-8 package compatibility with legacy clock distribution layouts.

Technical Context

The CY2303SXI implements a single-loop PLL with internally connected feedback path from REF output to FBK node, enabling precise phase alignment across all three outputs. Its architecture guarantees deterministic propagation delays: input-to-output skew ≤±200 ps and output-to-output skew ≤200 ps under matched load conditions (10–15 pF).

It operates exclusively at 3.3 V supply (3.0–3.6 V) with 5V-tolerant REFIN input, supports 10–166.67 MHz output frequencies across three independent pins (REF, REFx2, REFx4), and delivers 80 ps typical period jitter at frequencies <133.33 MHz with 15-pF load-validated for industrial temperature operation.

Key Specifications

Pinout & Package

Package: 8-pin 150-mil SOIC (S08), surface-mount, lead-free, 0.050-inch pitch, 0.150-inch body width, 0.0192-inch max height.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock multiplier applications.

Compared with IDT5V9885BGI and ICS843002AGI-01LFT, CY2303SXI uniquely combines 5V-tolerant input, OE control, industrial temperature rating, and sub-100 ps jitter in a CMOS/TTL-compatible SOIC-8 package-making it optimal for cost-sensitive, mixed-voltage industrial clock trees.

Availability

CY2303SXI is available at Aetrix Electronics and suitable for telecom line card design, industrial PLC backplane development, and data center switch fabric synchronization requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY2303SXI 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 CY2303 product line delivers phase-aligned clock multiplication for systems demanding deterministic inter-output and inter-device timing-targeting PC, telecom, datacom, and industrial control applications where skew and jitter directly impact functional reliability.

FAQ

What is the maximum load capacitance supported at 166.67 MHz output?

The CY2303SXI supports up to 10 pF load capacitance when operating at 133.33–166.67 MHz output frequencies. Exceeding this value degrades rise/fall times beyond 1.20 ns and risks violating the 200 ps output-to-output skew specification. Layout must minimize trace capacitance and avoid stubs to maintain timing integrity.

Does the OE pin require an external pull-up resistor?

No. The OE pin has an internal weak pull-up; it defaults to logic high (outputs enabled) when left unconnected. To disable outputs, drive OE low with a logic signal or open-drain driver-no external resistor is needed unless driving from a high-impedance source requiring additional noise immunity.

Can CY2303SXI operate with a 25 MHz crystal directly on REFIN?

Yes. The REFIN pin accepts 10–41.67 MHz CMOS/TTL-level signals, including 25 MHz fundamental-mode crystals with appropriate buffer circuitry. However, the device does not contain oscillator circuitry-external crystal must be driven by a compatible oscillator IC or buffered crystal module, not connected directly.

How is device-to-device skew measured and guaranteed?

Device-to-device skew is measured as the difference in REF output delay between two CY2303SXI units sharing the same REFIN signal, at VDD/2 crossing point, under industrial temperature conditions. Cypress guarantees ≤400 ps maximum skew across production lots-enabling predictable timing budgeting in multi-device clock trees without calibration.