Infineon Technologies CY2545QC010

Overview

CY2545QC010 from Cypress Semiconductor is a quad-PLL programmable spread spectrum clock generator in 24-pin QFN package, supporting 8 independent clock outputs (CLK1–CLK8), I²C configuration, and fractional-N synthesis for precise nonstandard frequency generation. It operates with 2.5 V/3.0 V/3.3 V core supply and offers bank-specific output voltages (1.8 V to 3.3 V) across three output banks, targeting EMI-sensitive PC and networking timing systems.

For engineers reviewing the CY2545QC010 datasheet, CY2545QC010 pinout, CY2545QC010 application, or CY2545QC010 equivalent, key selection criteria include its four independent PLLs, glitch-free frequency switching via FS pin, dual-spread-spectrum profiles (Lexmark/Linear), I²C programmability, and multi-voltage bank architecture enabling mixed-voltage system clock distribution.

Technical Context

The CY2545QC010 integrates four fully independent PLLs-two with spread spectrum (PLL3/PLL4) and two without-each configurable via I²C to generate frequencies from 3 MHz to 166 MHz. Input reference options include an 8–48 MHz crystal (XIN/EXCLKIN) or 8–166 MHz external clock (CLKIN/RST), with internal regulation from 2.5–3.3 V VDD to 1.8 V core logic.

Its crossbar switch enables arbitrary routing of six clock sources (XIN, CLKIN, PLL1–PLL4) to eight outputs, while banked power supplies (VDD_CLK_B1/B2/B3) allow simultaneous 1.8 V, 2.5 V, 3.0 V, and 3.3 V outputs. Spread spectrum modulation supports center-spread (±0.125% to ±2.5%) or down-spread (–0.25% to –5.0%) with selectable Lexmark or Linear profiles.

Key Specifications

Pinout & Package

24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pinout validated per Cypress Document 001-13196 Rev. *I (CY2545 variant).

Key Features

Applications

Equivalent & Alternatives

Cypress CY2545QC010 has documented alternatives offering comparable quad-PLL architecture and I²C programmability.

Compared with IDT 5P49V5901A and Si5351A, CY2545QC010 uniquely delivers eight glitch-free outputs, dual-spread-spectrum profiles, nonvolatile configuration, and true multi-bank voltage support - making it optimal for production-grade PC, networking, and industrial timing systems requiring EMI compliance and field reprogrammability.

Availability

CY2545QC010 is available at Aetrix Electronics and suitable for PC motherboard design, enterprise networking equipment, industrial embedded controllers, and consumer multimedia systems requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for CY2545QC010 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 U.S.-based semiconductor company specializing in programmable system-on-chip (PSoC), memory, and high-performance timing solutions for industrial, automotive, and computing markets.

CY2545QC010 belongs to Cypress's programmable clock generator product line, designed specifically for EMI-sensitive, multi-clock-domain systems requiring flexible, field-updatable, and low-jitter timing with minimal board space and BOM count.

FAQ

What is the maximum output frequency supported by CY2545QC010?

The CY2545QC010 supports output frequencies from 3 MHz to 166 MHz across all eight clock outputs. This range covers standard interface clocks including PCIe Gen1–Gen3 (100 MHz), Gigabit Ethernet (125 MHz), SATA (150 MHz), and DDR3/4 memory interfaces (up to 1600 MT/s). Frequency accuracy is maintained within ±0.1 ppm using fractional-N synthesis.

Does CY2545QC010 require an external crystal?

Yes - CY2545QC010 requires an external 8–48 MHz crystal connected between XIN (Pin 24) and XOUT (Pin 23) for primary reference. Alternatively, it accepts an 8–166 MHz external clock on CLKIN/RST (Pin 21), but EXCLKIN (Pin 24) must still be terminated per datasheet AC specifications to ensure stable operation.

How does the glitch-free frequency switching work?

Glitch-free switching uses output dividers (not PLL relock) to transition between two pre-programmed frequency configurations stored in nonvolatile memory. When the FS pin (CLK3/FS, Pin 10) toggles, the device synchronously updates output dividers on the next clock edge - eliminating runt pulses, metastability, or phase discontinuity. No PLL relock delay occurs.

Can CY2545QC010 generate different output voltages simultaneously?

Yes - CY2545QC010 supports three independent output voltage banks: Bank1 (CLK1/CLK2) powered by VDD_CLK_B1 (Pin 3), Bank2 (CLK3–CLK5) by VDD_CLK_B2 (Pin 14), and Bank3 (CLK6–CLK8) by VDD_CLK_B3 (Pin 16). Each bank accepts 1.8 V, 2.5 V, 3.0 V, or 3.3 V, enabling concurrent 1.8 V, 2.5 V, and 3.3 V clocks on a single chip.