Infineon Technologies CY2303SXIT

Overview

CY2303SXIT from Cypress Semiconductor is a 3-output, phase-aligned clock multiplier IC with on-chip PLL, delivering 1×, 2×, and 4× reference frequencies (10–166.67 MHz) from a single 10–41.67 MHz input. It guarantees ≤±200 ps input-to-output skew, ≤200 ps output-to-output skew, and 80 ps typical period jitter at 3.3 V supply. Used in PC, telecom, and datacom systems for synchronized multi-clock distribution.

For engineers reviewing the CY2303SXIT datasheet, CY2303SXIT pinout, CY2303SXIT application, or CY2303SXIT equivalent, key selection criteria include industrial-temperature operation (–40°C to +85°C), 5V-tolerant REFIN input, OE-controlled output enable, SOIC-8 package compatibility, and deterministic inter-device skew <400 ps in distributed clock trees.

Technical Context

The CY2303SXIT integrates a single-loop PLL with internal feedback routed from REF output to FBK, enabling precise phase alignment across all three outputs. Its architecture supports simultaneous generation of synchronous clocks at integer multiples without external loop filters or dividers.

It operates with 3.3 V supply and tolerates 5 V on REFIN, allowing direct interfacing with legacy 5 V logic. Output enable (OE) provides active-low control over all outputs with weak internal pull-up, supporting dynamic clock gating in power-sensitive systems.

Key Specifications

Pinout & Package

Package: 8-pin 150-mil SOIC (S8), surface-mount, lead-free, industrial temperature grade.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT5V9885BGI and ICS843002AGI-01LFT, the CY2303SXIT offers unique value in cost-sensitive industrial systems requiring 5V-tolerant input, deterministic multi-device skew, and guaranteed industrial temperature operation - without demanding differential signaling or external loop components.

Availability

CY2303SXIT is available at Aetrix Electronics and suitable for PCI-X bus design, telecom line card development, datacom switch fabric timing, and industrial embedded controller applications requiring stable component supply across extended temperature ranges.

Supply support for CY2303SXIT 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 embedded and industrial markets.

The CY2303 product line delivers phase-aligned clock multiplication for high-performance computing and communications systems, emphasizing deterministic skew, industrial reliability, and simplified clock tree design without external PLL components.

FAQ

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

At output frequencies above 133.33 MHz, the CY2303SXIT specifies a maximum load capacitance of 10 pF for industrial-temperature operation. This limit ensures rise/fall times remain ≤1.20 ns and maintains duty cycle stability between 40% and 60%. Exceeding 10 pF may degrade edge integrity and increase jitter beyond the 80 ps typical specification.

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

No. The OE pin has an internal weak pull-up that holds it high (output disabled) during power-up and reset. An external resistor is unnecessary unless active-low assertion must override the internal pull-up under specific sequencing conditions - in which case a 10 kΩ pull-down is recommended per Cypress application guidance.

Can CY2303SXIT accept a 50 MHz input clock?

No. The datasheet explicitly limits the input frequency range to 10 MHz–41.67 MHz. A 50 MHz REFIN signal exceeds the maximum specified input frequency and may cause PLL unlock, excessive jitter, or failure to achieve lock within the 1.0 ms typical lock time. Input must be divided externally to fall within spec.

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

Device-to-device skew is measured as the difference in propagation delay from REFIN to REF output between two CY2303SXIT units under identical conditions (same VDD, temperature, load, and input waveform). Cypress guarantees ≤400 ps skew across industrial temperature and voltage ranges, validated via characterization across process corners and confirmed in production test screening.