Infineon Technologies CY2544QC014T

Overview

CY2544QC014T from Cypress Semiconductor is a quad-PLL programmable clock generator with spread spectrum capability, designed for high-precision timing synthesis in multi-clock domain systems. It delivers nine programmable LVCMOS outputs (3–166 MHz), supports 1.8 V input reference and 2.5/3.0/3.3 V output bank supplies, and integrates Fractional-N PLLs for zero-PPM frequency error-used in PC motherboard clock trees and embedded networking controllers.

For engineers reviewing the CY2544QC014T datasheet, CY2544QC014T pinout, CY2544QC014T application, or CY2544QC014T equivalent, key selection criteria include its four independent PLLs, per-bank voltage-selectable outputs (1.8 V/2.5 V/3.0 V/3.3 V), glitch-free frequency switching via FS pins, spread spectrum modulation (Lexmark/Linear profiles), and 24-pin QFN package compatibility with industrial temperature operation.

Technical Context

The CY2544QC014T implements four fully configurable PLLs-including two spread-spectrum-capable PLLs (PLL3 and PLL4)-with independent feedback dividers and output dividers enabling synthesis of unrelated frequencies from a single 8–48 MHz crystal or 8–166 MHz external reference. Input voltage support is 1.8 V for CLKIN and XIN/EXCLKIN, while VDD operates at 2.5/3.0/3.3 V with internal regulation to 1.8 V core logic.

Output banks are electrically isolated: Bank 1 (CLK1–CLK3) and Bank 2 (CLK4–CLK6) share VDD_CLK_B1/B2 supplies; Bank 3 (CLK7–CLK9) uses VDD_CLK_B3. Each bank supports independent output voltage selection (1.8 V/2.5 V/3.0 V/3.3 V), drive strength programming, and source routing via crossbar switch logic from six available sources (XIN/EXCLKIN, CLKIN, PLL1–PLL4).

Key Specifications

Pinout & Package

24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), thermally enhanced with exposed pad; RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

CY2544QC014T is functionally aligned with two Cypress-programmable alternatives differing in voltage support and spread spectrum implementation.

Compared with CY2548SC-1HT and CY2546QC-1HT, CY2544QC014T uniquely supports both 1.8 V reference inputs and 2.5/3.0/3.3 V VDD, enabling flexible integration in mixed-supply systems while retaining crystal-based timing autonomy and industrial temperature rating.

Availability

CY2544QC014T is available at Aetrix Electronics and suitable for PC motherboard design, industrial PLC development, and embedded networking equipment requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.

Supply support for CY2544QC014T 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 precision timing solutions for industrial, automotive, and consumer markets.

CY2544QC014T belongs to Cypress's programmable clock generator product line, engineered to replace fixed-frequency oscillators and multiple discrete clock ICs in complex digital systems requiring flexible, low-EMI, multi-domain timing.

FAQ

What is the maximum output frequency supported by CY2544QC014T?

CY2544QC014T supports output frequencies from 3 MHz to 166 MHz across all nine clock outputs. This range covers standard interface clocks including PCIe Gen1/Gen2 (100 MHz), USB 2.0 (48 MHz), SATA (150 MHz), and DDR2/DDR3 memory clocks (200–400 MHz divided down). The upper limit is constrained by LVCMOS drive strength and signal integrity at the target load.

Can CY2544QC014T operate without an external crystal?

Yes. CY2544QC014T accepts an external 1.8 V clock signal (8–166 MHz) on the XIN/EXCLKIN pin, bypassing the internal crystal oscillator. When using this mode, the XOUT pin is unused, and the device relies solely on the applied reference clock-ideal for systems with existing low-jitter clock sources or where crystal placement is mechanically constrained.

How does the spread spectrum feature reduce EMI?

CY2544QC014T modulates selected PLL outputs (PLL3/PLL4) using triangular (Lexmark) or sawtooth (Linear) profiles, spreading energy over a narrow bandwidth (±0.125% to ±2.5%). This lowers peak radiated emissions by up to 10–15 dB at fundamental harmonics-verified per FCC Part 15 and CISPR 22-without affecting system timing accuracy or duty cycle stability.

Is OTP programming performed at Aetrix Electronics?

No. CY2544QC014T ships unprogrammed (blank OTP) and requires Cypress-provided programming hardware (e.g., CY3672 Programmer) and software (CyClocksRT) for configuration. Aetrix provides datasheets, reference schematics, and technical coordination with Infineon/Cypress application engineering-but final OTP programming occurs at customer or contract manufacturer sites prior to system assembly.