Infineon Technologies CY23EP05SXC-1HT

Overview

CY23EP05SXC-1HT from Cypress Semiconductor is a 2.5 V or 3.3 V zero-delay clock buffer IC with five low-skew LVCMOS outputs, integrated PLL, and adjustable input-output delay via CLKOUT loading. It operates from 10 MHz to 220 MHz (3.3 V high-drive), delivers 30 ps typical output-output skew, 22 ps typical cycle-to-cycle jitter, and supports industrial temperature range (–40 °C to +85 °C). Used in FPGA clock distribution and high-speed serial interface timing.

For engineers reviewing the CY23EP05SXC-1HT datasheet, CY23EP05SXC-1HT pinout, CY23EP05SXC-1HT application, or CY23EP05SXC-1HT equivalent, key selection criteria include zero-delay PLL architecture, 5-output skew control, supply voltage flexibility (2.5 V/3.3 V), high-drive vs standard-drive variants, and SOIC-8 thermal performance under loaded conditions.

Technical Context

The CY23EP05SXC-1HT implements an on-chip PLL with internal feedback routed from the CLKOUT pin, enabling true zero input-output propagation delay when all outputs-including CLKOUT-are identically loaded. Its closed-loop bandwidth is 1–1.5 MHz at 3.3 V and 0.8 MHz at 2.5 V.

It features weak pull-downs on REF and all output pins, power-down mode activation below ~2 MHz REF frequency (<25 µA IDD), and configurable drive strength: high-drive version (-1H) achieves faster rise/fall times (e.g., 0.5 ns at 3.3 V, CL = 15 pF, >133.3 MHz) versus standard drive.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (150-mil), surface-mount, JEDEC MS-012AC compliant, θ_JA = 145 °C/W.

Key Features

Applications

Equivalent & Alternatives

Two verified alternatives exist for CY23EP05SXC-1HT with documented functional and parametric differences.

Compared with IDT 8T49N241 and ON Semi NB3N502, CY23EP05SXC-1HT uniquely combines zero-delay PLL architecture, industrial temperature rating, and user-adjustable delay-making it optimal for deterministic timing in FPGA, DDR, and PCIe systems where phase alignment is critical.

Availability

CY23EP05SXC-1HT is available at Aetrix Electronics and suitable for FPGA clock fanout, PCIe reference clock distribution, and industrial Ethernet PHY synchronization requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY23EP05SXC-1HT 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.

CY23EP05 belongs to Cypress's zero-delay buffer product line, engineered specifically for deterministic clock distribution in high-speed digital systems where phase coherence and low jitter are mandatory.

FAQ

What is the function of the CLKOUT pin beyond being an output?

The CLKOUT pin provides the internal PLL feedback signal; its external loading directly controls the input-to-output propagation delay. Matching its total load (5 pF internal + external) to that of other outputs achieves zero delay. Adjusting CLKOUT load shifts delay across all outputs uniformly, enabling board-level timing calibration without hardware changes.

Does CY23EP05SXC-1HT support 5 V tolerant inputs?

No. The device is strictly rated for 2.5 V or 3.3 V operation. Inputs exceed 3.6 V (3.3 V supply) or 2.7 V (2.5 V supply) violate absolute maximum ratings and may cause permanent damage. External level-shifting is required if driven from 5 V logic sources.

How does the -1H suffix affect performance compared to standard -1?

The -1H variant offers higher drive strength: rise/fall times improve by up to 40% (e.g., 0.5 ns vs. 0.6 ns at 3.3 V, >133.3 MHz, CL = 15 pF), enabling cleaner edges into heavier capacitive loads. It also extends max frequency to 220 MHz at 3.3 V versus 167 MHz for -1, with identical pinout and logic behavior.

Can CY23EP05SXC-1HT operate with mixed 2.5 V and 3.3 V supplies on the same board?

No. VDD is a single-supply pin; the device must be powered exclusively at either 2.5 V or 3.3 V. It does not support dual-supply operation or I/O voltage translation. System-level voltage domain isolation is required if interfacing with both 2.5 V and 3.3 V logic families.