Infineon Technologies CY29352AXIT

Overview

CY29352AXIT 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), used in high-speed memory subsystems and FPGA clock distribution.

For engineers reviewing the CY29352AXIT datasheet, CY29352AXIT pinout, CY29352AXIT application, or CY29352AXIT equivalent, key selection criteria include input/output voltage flexibility (2.5 V/3.3 V), programmable output division ratios (1:1 to 3:1), split supply domains per output bank, PLL bypass mode for static operation, and TQFP-32 package compatibility with MPC9352/MPC952.

Technical Context

The CY29352AXIT integrates a voltage-controlled oscillator (VCO) operating between 200 MHz and 500 MHz, supporting input frequencies from 16.67 MHz to 200 MHz via configurable feedback dividers (×2, ×4, ×6, ×8, ×12). Its three independent output banks (A: 5 outputs, B: 4, C: 2) use dedicated dividers-bank A divides by 4/6, B by 4/2, C by 2/4-enabling seven discrete output-to-input frequency ratios including 1:1, 2:1, 3:2, and 1:3.

It features dual-mode operation: normal PLL mode with external feedback (FB_IN tied to an output) and static bypass mode (PLL_EN# = HIGH), where REFCLK directly drives output dividers without PLL lock constraints. Each output drives one 50 Ω parallel-terminated line or two 50 Ω series-terminated lines, achieving effective fanout of 1:22.

Key Specifications

Pinout & Package

32-pin 1.4 mm thin quad flat pack (TQFP) with exposed pad; pin-compatible with MPC9352 and MPC952; requires 0.1 µF bypass capacitors within 0.2" of each VDD pin.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC9352 and PI6C20400, CY29352AXIT uniquely combines programmable division, Spread Aware®, and triple-voltage-bank flexibility - making it suitable for complex clock trees requiring both synthesis and distribution, unlike the fixed-ratio MPC9352 or fanout-only PI6C20400.

Availability

CY29352AXIT is available at Aetrix Electronics and suitable for DDR2 memory subsystems, FPGA clock distribution, industrial PLC backplanes, and network switch PHY timing requiring stable component supply and long-term industrial lifecycle support.

Supply support for CY29352AXIT 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 markets.

The CY29352AXIT belongs to Infineon's high-performance clock buffer product line, designed specifically for low-skew, multi-voltage clock distribution in memory-intensive and FPGA-based systems demanding deterministic timing and industrial reliability.

FAQ

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

In PLL bypass mode (PLL_EN# = HIGH), the CY29352AXIT accepts DC to 200 MHz input frequencies - the minimum input frequency specification does not apply. This allows static clock distribution without PLL lock constraints, supporting configuration clocks or low-frequency control signals.

How does the split VDD architecture improve system design?

The independent VDDQA, VDDQB, and VDDQC supplies let designers drive 2.5 V and 3.3 V loads simultaneously from a single device - eliminating external level shifters, reducing PCB layer count, and avoiding timing mismatches caused by discrete translation components in high-speed clock paths.

Can FB_IN be connected to any output, or are there restrictions?

FB_IN must be connected to an output sharing the same voltage rail as REFCLK (e.g., if REFCLK is 3.3 V, FB_IN must connect to a 3.3 V output). It cannot cross voltage domains, and the selected output must be enabled and configured to match the intended feedback division ratio per the Frequency Table.

What is the purpose of Spread Aware® technology in this device?

Spread Aware® adjusts the PLL loop bandwidth dynamically to accommodate spread-spectrum clocking (SSC) inputs - maintaining lock stability and minimizing output jitter even when the reference clock has intentional frequency modulation for EMI reduction, which is critical in dense PCB layouts and FCC/CE-compliant systems.