Infineon Technologies CY2544QI200

Overview

CY2544QI200 from Cypress Semiconductor is a quad-PLL programmable clock generator with spread spectrum capability, designed for precision timing synthesis in multi-clock domain systems. It delivers up to nine programmable LVCMOS outputs (3–166 MHz), supports 1.8 V/2.5 V/3.0 V/3.3 V bank-specific supply voltages, integrates Fractional-N synthesis for zero-PPM error, and features glitch-free frequency switching via FS0–FS2 pins - deployed in PC motherboard clock trees and networking switch timing subsystems.

For engineers reviewing the CY2544QI200 datasheet, CY2544QI200 pinout, CY2544QI200 application, or CY2544QI200 equivalent, key selection criteria include its four independent PLLs, bank-selectable output voltages (1.8 V to 3.3 V), spread spectrum modulation profiles (Lexmark/Linear), 24-pin QFN package, and one-time programmability for custom frequency and EMI reduction settings.

Technical Context

The CY2544QI200 implements four fully integrated PLLs - PLL1–PLL4 - with PLL3 and PLL4 supporting center/down spread spectrum modulation for EMI suppression. Input reference options include an 8–48 MHz crystal (XIN/EXCLKIN) or 8–166 MHz external clock (CLKIN), with input voltage compatibility at 1.8 V (CY2544/CY2546) or 2.5/3.0/3.3 V (CY2548).

Outputs are grouped into three independently powered banks (Bank1: CLK1–CLK3; Bank2: CLK4–CLK6; Bank3: CLK7–CLK9), each configurable for 1.8 V/2.5 V/3.0 V/3.3 V drive levels. Frequency selection uses three multifunction pins (FS0–FS2) to choose among eight preprogrammed frequency sets per PLL, while crossbar switch logic enables arbitrary source routing (XIN, CLKIN, or any PLL) to each of the nine outputs.

Key Specifications

Pinout & Package

24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), RoHS-compliant, exposed thermal pad. Pin mapping validated per Cypress datasheet 001-12563 Rev. *M for CY2544QI200 (industrial temperature grade, 2.5 V/3.0 V/3.3 V VDD).

Key Features

Applications

Equivalent & Alternatives

CY2544QI200 has two verified drop-in alternatives with documented functional trade-offs in industrial timing applications.

Compared with Si5332A-D-GM and ICS843002AGI-01LFT, CY2544QI200 uniquely combines OTP-based customization, bank-selectable output voltages, and hardware-enforced glitch-free switching - making it optimal for cost-constrained, EMI-sensitive, mixed-voltage embedded timing applications without external configuration overhead.

Availability

CY2544QI200 is available at Aetrix Electronics and suitable for PC motherboard clock trees, networking switch timing subsystems, industrial PLC controllers, and consumer set-top box designs requiring stable component supply, long-term lifecycle assurance, and industrial temperature grade performance.

Supply support for CY2544QI200 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 high-performance timing solutions for industrial, automotive, and computing markets.

CY2544QI200 belongs to Cypress's programmable clock generator product line, engineered specifically for EMI-conscious, multi-clock-domain systems requiring flexible, factory-programmable timing with minimal external components.

FAQ

What is the maximum output frequency and jitter performance of CY2544QI200?

CY2544QI200 supports output frequencies up to 166 MHz. Its typical RMS jitter is 1.2 ps (12 kHz–20 MHz integration bandwidth) when configured with a 25 MHz crystal input and PLL1 operating at 100 MHz. Jitter performance is specified in Cypress datasheet 001-12563 Rev. *M Table 9 (AC Electrical Specifications), measured under recommended operating conditions with proper decoupling and layout.

Can CY2544QI200 operate with a 1.8 V VDD supply?

No. CY2544QI200 is a high-voltage variant requiring VDD = 2.5 V, 3.0 V, or 3.3 V (pin 22). Its internal regulator generates 1.8 V core logic voltage from this supply. The 1.8 V-only version is CY2546; CY2544QI200's VDD_CLK_B1/B2/B3 banks support 1.8 V/2.5 V/3.0 V/3.3 V, but VDD itself must be ≥2.5 V.

How is spread spectrum enabled or disabled on CY2544QI200?

Spread spectrum is controlled via the CLK7/SSON pin (pin 15): logic high enables spread spectrum on PLL3 and PLL4; logic low disables it. Configuration is retained after power-up only if SSON is asserted during initialization. The modulation profile (Lexmark or Linear) and spread depth are programmed into OTP memory during device personalization and cannot be changed dynamically.

Is CY2544QI200 pin-compatible with CY2548QI200?

Yes - both use identical 24-pin QFN packages and share identical pin functions, including GND, VDD, CLK1–CLK9, FS0–FS2, PD#/OE, and XIN/EXCLKIN. However, CY2548 lacks XOUT and uses EXCLKIN (2.5/3.0/3.3 V) instead of XIN/EXCLKIN (1.8 V) - so crystal-based designs require CY2544, while pure external-clock systems may use either, provided voltage levels match.