Infineon Technologies CY2510ZXC-1T

Overview

CY2510ZXC-1T from Cypress Semiconductor is an eleven-output Spread Aware™ zero-delay buffer IC designed for DDR SDRAM DIMM clock distribution. It operates at 3.3 V, supports 40–140 MHz output frequencies, delivers <100 ps cycle-to-cycle jitter and <100 ps output-to-output skew, and integrates 25 Ω series damping resistors on all eleven LVCMOS/LVTTL outputs for direct PCB trace driving in memory modules.

For engineers reviewing the CY2510ZXC-1T datasheet, CY2510ZXC-1T pinout, CY2510ZXC-1T application, or CY2510ZXC-1T equivalent, key selection criteria include spread-spectrum timing compatibility, feedback-based zero-delay synchronization, eleven-output drive capability with single OE control, and TSSOP-24 packaging for high-density DIMM layouts.

Technical Context

The CY2510ZXC-1T implements a PLL-based zero-delay architecture with external feedback (FBIN/FBOUT) to align output edges precisely with the reference CLK input. Its Spread Aware™ design preserves input spread-spectrum modulation to prevent tracking skew in EMI-sensitive PC133 and DDR systems.

All eleven outputs (Q0–Q9, FBOUT) are LVCMOS/LVTTL-compatible, each with integrated 25 Ω series termination. A single OE pin controls all outputs simultaneously, enabling synchronous shutdown for EMI and power reduction in idle DIMM states.

Key Specifications

Pinout & Package

Package: 24-pin thin shrink small outline package (TSSOP), lead-free, commercial temperature range (0 °C to +70 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT 5V2310APGI and ON Semi NB3N502DG, the CY2510ZXC-1T uniquely combines eleven outputs, on-die 25 Ω termination, Spread Aware™ SSFTG compatibility, and external feedback for trace-matched zero-delay-making it the only option qualified for PC133-compliant DIMMs with EMI-reduced motherboards.

Availability

CY2510ZXC-1T is available at Aetrix Electronics and suitable for PC133 SDRAM DIMMs, DDR memory modules, server memory subsystems, and industrial embedded memory boards requiring stable component supply and long-term obsolescence management.

Supply support for CY2510ZXC-1T 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 U.S.-based semiconductor company specializing in timing, memory, and programmable solutions for computing and communications infrastructure.

The CY2509/10 product line was engineered specifically for high-speed memory module clock distribution, emphasizing spread-spectrum compatibility, ultra-low skew, and integrated termination to simplify DIMM design and ensure JEDEC timing compliance.

FAQ

What is the purpose of the FBIN and FBOUT pins?

FBIN and FBOUT form an external feedback loop essential for zero-delay operation. FBOUT connects directly to FBIN via a PCB trace matched in length to the output traces. This allows the internal PLL to lock the output phase to the reference CLK, ensuring all outputs arrive at their destinations simultaneously with the original clock edge-critical for DIMM timing budgets.

Can CY2510ZXC-1T be used with non-spread-spectrum clock sources?

Yes. The Spread Aware™ feature is transparent to non-spread-spectrum inputs: the device functions as a standard zero-delay buffer with identical jitter, skew, and drive performance. No configuration or external components are needed-the circuit automatically adapts to the presence or absence of spread-spectrum modulation on the CLK input.

Why does CY2510ZXC-1T have separate AVDD and VDD pins?

AVDD powers the analog PLL and feedback circuitry, while VDD supplies digital output drivers. Separating these rails-combined with recommended ferrite bead filtering on AVDD-reduces coupling of digital switching noise into the sensitive analog timing path, maintaining the specified <100 ps cycle-to-cycle jitter performance across temperature and load conditions.

Is the CY2510ZXC-1T pin-compatible with CY2509ZXC-1T?

No. Although both use TSSOP-24 packages, CY2510ZXC-1T has eleven outputs (Q0–Q9 + FBOUT) and one OE pin, while CY2509ZXC-1T provides ten outputs (Q0–Q8 + FBOUT) and two independent OE pins (OE0:4 and OE5:8). Pin assignments differ significantly-especially for OE and Q9-making them functionally and physically incompatible without PCB redesign.