Infineon Technologies CY2304SXI-2T

Overview

CY2304SXI-2T from Infineon Technologies (formerly Cypress) is a 3.3 V industrial-grade zero delay clock buffer with on-chip PLL, four low-skew LVCMOS outputs (2 banks × 2), 10–133 MHz operating range, <200 ps output-to-output skew, and 90 ps typical cycle-to-cycle jitter at 66 MHz/15 pF. It distributes synchronized clocks in telecom backplanes and industrial control systems where deterministic timing alignment is critical.

For engineers reviewing the CY2304SXI-2T datasheet, CY2304SXI-2T pinout, CY2304SXI-2T application, or CY2304SXI-2T equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), FBK-driven zero-delay configuration, bank-selectable 1×/2× frequency modes, and guaranteed device-to-device skew <500 ps across multiple buffers.

Technical Context

The CY2304SXI-2T implements a fully integrated PLL-based zero-delay architecture where the REF input drives a phase detector, and the FBK pin closes the loop using one of the four outputs. Its dual-bank output structure supports independent frequency scaling: Bank A outputs match REF when FBK is sourced from Bank B (yielding 2×REF on Bank A), or vice versa.

Skew control relies on matched capacitive loading across all outputs-including the feedback source-to achieve sub-250 ps REF-to-output delay and <200 ps intra-bank skew. Power-down mode disables the PLL and three-states all outputs, drawing <25 μA at 0 MHz REF.

Key Specifications

Pinout & Package

Package: 8-pin 150-mil SOIC (Small Outline Integrated Circuit), surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

Two validated alternatives exist for CY2304SXI-2T, differing in frequency range, skew performance, and industrial qualification.

Compared with IDT 8T49N241 and ON Semi NB3N3020B, the CY2304SXI-2T uniquely delivers guaranteed industrial temperature operation, sub-200 ps intra-bank skew, and true zero-delay configurability via internal PLL feedback-making it irreplaceable in deterministic, multi-device clock trees requiring field-deployable robustness.

Availability

CY2304SXI-2T is available at Aetrix Electronics and suitable for telecom line cards, industrial PLC backplanes, medical imaging subsystems, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY2304SXI-2T 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, sensing, connectivity, and security solutions for industrial, automotive, and communications markets.

The CY2304 product line was originally developed by Cypress Semiconductor and continues under Infineon as part of its high-performance timing portfolio, targeting deterministic clock distribution in mission-critical infrastructure where zero-delay alignment and multi-device synchronization are essential.

FAQ

What is the maximum load capacitance supported at 133 MHz?

The CY2304SXI-2T supports up to 15 pF load capacitance at frequencies from 100 MHz to 133 MHz. Exceeding this value degrades rise/fall times and increases jitter beyond specification-verified in switching characteristics tables for both -1 and -2 variants under 15 pF test conditions.

How does the FBK pin determine output frequency in CY2304SXI-2T?

When FBK is driven from Bank A, Bank B outputs run at REF/2; when FBK is driven from Bank B, Bank A outputs run at 2×REF. This behavior is fixed by internal logic and confirmed in the "Available Configurations" table of the datasheet-no external resistors or strapping pins are involved.

Is the REF input truly 5 V tolerant, and what protection is provided?

Yes, the REF pin is rated for –0.5 V to +7.0 V DC input voltage per Absolute Maximum Ratings, with internal clamping diodes to VDD and GND. It tolerates 5 V TTL/CMOS signals directly without level-shifting, verified across industrial temperature and voltage corners in Electrical Characteristics testing.

Can CY2304SXI-2T operate with unequal capacitive loads on different outputs?

Yes-but unequal loading introduces deterministic input-output delay offset per Figure 2 in the datasheet. For zero delay, all outputs (including FBK source) must be equally loaded. Unequal loads are permissible only when intentional delay tuning is required, and skew will increase proportionally.