Infineon Technologies CY29352AXI

Overview

CY29352AXI from Infineon Technologies (formerly Cypress) is a 2.5 V or 3.3 V, 200 MHz PLL-based zero-delay clock buffer with 11 LVCMOS outputs, ±2% max duty cycle variation, 125 ps max output-output skew within bank, and industrial temperature range (–40 °C to +85 °C). It supports split 2.5 V/3.3 V output banks and operates in PLL bypass mode for static clock distribution in high-speed memory and processor interfaces.

For engineers reviewing the CY29352AXI datasheet, CY29352AXI pinout, CY29352AXI application, or CY29352AXI equivalent, key selection criteria include output bank voltage partitioning, VCO frequency range (200–500 MHz), feedback divider configuration (×2/×4/×6/×8/×12), PLL bypass capability, and 32-pin TQFP package compatibility with MPC9352/MPC952.

Technical Context

The CY29352AXI integrates a phase-locked loop with a VCO operating between 200 MHz and 500 MHz, enabling output frequencies from 16.67 MHz to 200 MHz via programmable feedback dividers (×2, ×4, ×6, ×8, ×12) and output dividers per bank (A: ÷4/÷6; B: ÷4/÷2; C: ÷2/÷4). Its three independent output banks support mixed-voltage operation with dedicated VDDQA/VDDQB/VDDQC supplies.

It features LVCMOS-compatible REFCLK and FB_IN inputs, MR/OE# for global output enable/disable, PLL_EN# for full PLL bypass, and SEL(A:C)/VCO_SEL for frequency configuration. The device maintains static timing in bypass mode and achieves ≤175 ps bank-to-bank skew when outputs share voltage and frequency.

Key Specifications

Pinout & Package

Package: 32-pin 1.4 mm thin quad flat pack (TQFP), RoHS-compliant, 0.8 mm pitch, body size 7 mm × 7 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar zero-delay clock buffer applications.

Compared with MPC9352 and ICS853S01I, CY29352AXI uniquely combines pin compatibility with enhanced skew performance, Spread Aware® EMI reduction, and true static bypass mode - making it optimal for upgrading industrial and networking clock trees where deterministic latency and mixed-voltage support are mandatory.

Availability

CY29352AXI is available at Aetrix Electronics and suitable for DDR3 memory subsystems, multi-core processor reference distribution, network switch fabric timing, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY29352AXI 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, sensing, connectivity, and security solutions for automotive, industrial, and IoT applications.

CY29352AXI belongs to Infineon's high-performance clock buffer product line, engineered specifically for low-skew, multi-voltage clock distribution in industrial and communications infrastructure where reliability, thermal robustness, and long-term supply continuity are essential.

FAQ

What is the minimum input frequency supported in PLL bypass mode?

In PLL bypass mode (PLL_EN# = HIGH), the CY29352AXI accepts input frequencies from DC up to 200 MHz. The minimum input frequency specification does not apply in this mode because the reference clock feeds directly to the output dividers without PLL involvement - enabling use with very low-frequency control signals or gated clocks.

Can CY29352AXI generate non-integer frequency ratios like 3:2 or 2:3?

Yes. By configuring the VCO and feedback dividers (e.g., VCO_SEL=0, feedback ÷4) and selecting appropriate output dividers (e.g., Bank A ÷6, Bank B ÷4), the device achieves exact 3:2 (150 MHz out / 100 MHz in) and 2:3 (66.67 MHz out / 100 MHz in) ratios. These are explicitly listed in the Function Table and validated across the full operating temperature range.

How is power supply decoupling implemented for optimal high-frequency performance?

Each VDD/VDDQA/VDDQB/VDDQC/AVDD pin requires a 0.1 µF ceramic capacitor placed within 0.2 inches of the pin. AVDD and VDD must be at least equal to or higher than the output bank supply voltages. This layout prevents high-frequency noise coupling into the PLL and ensures stable VCO operation up to 500 MHz.

Is CY29352AXI compatible with 1.8 V logic interfaces?

No. CY29352AXI supports only 2.5 V and 3.3 V LVCMOS I/O levels. Its VIH/VIL thresholds, output drive strength, and internal regulator design are specified exclusively for those rails. Connecting to 1.8 V systems requires external level-shifting circuitry or a different buffer family such as Infineon's 1.8 V–capable clock devices.