Infineon Technologies CY2544QC013

Overview

CY2544QC013 from Cypress Semiconductor is a quad-PLL programmable clock generator with spread spectrum capability, designed for precise multi-frequency synthesis in timing-critical systems. It delivers nine programmable LVCMOS clock 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 CY2544QC013 datasheet, CY2544QC013 pinout, CY2544QC013 application, or CY2544QC013 equivalent, key selection criteria include its four independent PLLs, per-bank voltage-selectable outputs (1.8/2.5/3.0/3.3 V), glitch-free frequency switching via FS pins, and Lexmark/Linear spread-spectrum modulation for EMI reduction.

Technical Context

The CY2544QC013 implements four fully integrated PLLs - PLL1–PLL2 for standard synthesis, PLL3–PLL4 with spread-spectrum modulation - enabling simultaneous generation of unrelated frequencies from a single 8–48 MHz crystal or 8–166 MHz external reference. Input compatibility includes 1.8 V LVCMOS CLKIN and XIN/EXCLKIN, while internal regulation derives 1.8 V core logic from 2.5/3.0/3.3 V VDD.

Outputs are grouped into three independently powered banks (Bank1: CLK1–CLK3; Bank2: CLK4–CLK6; Bank3: CLK7–CLK9), each configurable for 1.8/2.5/3.0/3.3 V drive levels. Frequency selection uses three multifunction FS pins (FS0–FS2) to choose among eight preprogrammed PLL configurations, with crossbar routing allowing arbitrary source assignment (XIN, CLKIN, or any PLL) to each output.

Key Specifications

Pinout & Package

Package: 24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), RoHS-compliant, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

CY2544QC013 is part of Cypress's legacy quad-PLL clock generator family; direct functional alternatives include CY2546QC013 and CY2548QC013.

Compared with CY2546QC013 and CY2548QC013, CY2544QC013 uniquely supports both crystal and external clock inputs *and* provides flexible 2.5/3.0/3.3 V main supply with 1.8 V core - making it optimal for general-purpose PC, consumer, and industrial designs requiring maximum configuration flexibility and board-level integration.

Availability

CY2544QC013 is available at Aetrix Electronics and suitable for PC motherboard design, network switch timing subsystems, and industrial PLC backplane applications requiring stable component supply and long-term lifecycle support.

Supply support for CY2544QC013 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 industrial, automotive, and consumer markets.

CY2544QC013 belongs to the CY254x Quad-PLL Clock Generator product line, engineered for high-precision, multi-frequency clock synthesis in complex digital systems where EMI compliance, voltage flexibility, and field-programmable timing are critical.

FAQ

What is the function of the PD#/OE pin (Pin 4) on CY2544QC013?

Pin 4 serves as a dual-function control: configured as PD# (power-down), it is an active-low signal that shuts down the entire device to minimize quiescent current; configured as OE (output enable), it gates all clock outputs synchronously without affecting PLL lock state. Configuration is determined during factory programming and cannot be changed in-circuit.

Can CY2544QC013 generate a 100 MHz clock with spread spectrum from an 8 MHz crystal?

Yes. Using PLL1 or PLL2 (non-SS) or PLL3/PLL4 (SS-enabled), the device synthesizes 100 MHz from 8 MHz via fractional-N division - e.g., 8 MHz × 12.5 = 100 MHz. Spread spectrum can then be applied to that output with center-spread ±0.5% or down-spread –2.0%, as programmed in nonvolatile memory.

How does the CY2544QC013 handle multiple output voltage domains?

It uses three dedicated power pins - VDD_CLK_B1 (pins 3), VDD_CLK_B2 (pin 14), and VDD_CLK_B3 (pin 16) - each supplying one output bank (CLK1–CLK3, CLK4–CLK6, CLK7–CLK9). Each bank's output voltage matches its respective VDD_CLK_Bx supply, enabling concurrent 1.8 V, 2.5 V, and 3.3 V clocks without level shifters.

Is external configuration hardware required to program CY2544QC013 after soldering?

No. CY2544QC013 features one-time programmable (OTP) nonvolatile memory that stores all configuration data - including PLL ratios, spread-spectrum settings, drive strength, and crystal load capacitance - at manufacturing. It operates autonomously at power-up with no external EEPROM, I²C interface, or programming adapter needed.