Infineon Technologies CY28411ZXCT

Overview

CY28411ZXCT from Cypress Semiconductor is a clock generator IC compliant with Intel® CK410M specification, designed for Intel Alviso chipset platforms and Pentium-M CPU systems. It delivers differential 100-MHz SRC clocks, fixed 96-MHz dot clock, 48-MHz USB clock, 33-MHz PCI clock, and 14.318-MHz reference clock-all from a single 3.3V supply in a 56-pin SSOP/TSSOP package.

For engineers reviewing the CY28411ZXCT datasheet, CY28411ZXCT pinout, CY28411ZXCT application, or CY28411ZXCT equivalent, key selection criteria include I²C programmability, selectable CPU frequency modes (100/133 MHz), Lexmark spread-spectrum EMI reduction, differential output drive capability, and VTT_PWRGD#-synchronized configuration latching.

Technical Context

The CY28411ZXCT integrates two PLLs: PLL1 locks to the 14.318-MHz crystal input (XIN/XOUT) to generate core timing, while PLL2 synthesizes multiple output frequencies-including CPU, SRC, PCI, and USB clocks-with independent enable/disable control via I²C registers. All differential outputs (CPUT/CPUC, SRCT/SRCC, DOT96T/DOT96C, SRC4_SATAT/SRC4_SATAC) support LVDS-compatible swing and termination.

Frequency selection is determined by FS_A/FS_B/FS_C logic levels sampled once at VTT_PWRGD# assertion, enabling stable boot-time configuration without runtime reconfiguration. The device supports synchronous stop/start of clock outputs via CPU_STP# and PCI_STP# inputs, with configurable Hi-Z or driven behavior during power-down states per register-controlled drive modes.

Key Specifications

Pinout & Package

Package: 56-pin SSOP (0.209" body width) and TSSOP (0.244" body width), RoHS-compliant, moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock generator applications.

Compared with IDT 87010AGLFT and ICS952002AF, the CY28411ZXCT uniquely provides Intel CK410M-compliant 96-MHz differential dot clock and Lexmark EMI profile-critical for notebook platforms where display timing and radiated emissions are tightly constrained.

Availability

CY28411ZXCT is available at Aetrix Electronics and suitable for Intel Pentium-M notebook platforms, SATA host controller timing, embedded graphics subsystems, and USB 2.0 peripheral hubs requiring stable component supply across long-lifecycle industrial and commercial programs.

Supply support for CY28411ZXCT 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 Corporation is a U.S.-based semiconductor company specializing in high-performance timing, memory, and programmable logic solutions for computing and communications markets.

The CY28411 belongs to Cypress's CK410M-compliant clock generator product line, engineered specifically to meet Intel's Alviso chipset timing architecture and EMI requirements for mobile computing platforms.

FAQ

What crystal specifications are required for CY28411ZXCT?

The CY28411ZXCT requires a 14.31818 MHz parallel-resonant AT-cut crystal with 20 pF load capacitance, maximum 0.1 mW drive level, and ±35 ppm initial tolerance. Series-resonant crystals must not be substituted, as they cause frequency error exceeding specification due to incorrect loading.

How is CPU frequency selected on CY28411ZXCT?

CPU frequency (100 MHz or 133 MHz) is selected by applying logic levels to FS_A, FS_B, and FS_C prior to VTT_PWRGD# assertion. The device samples these pins once at VTT_PWRGD# low-to-high transition and locks the configuration; subsequent changes have no effect unless reset.

Can all differential outputs be disabled independently?

Yes-each differential output (CPUT/CPUC, SRCT/SRCC, DOT96T/DOT96C, SRC4_SATAT/SRC4_SATAC) has dedicated enable bits in I²C registers (Bytes 0–2). For example, CPUT0/CPUC0 is controlled by Bit 1 of Control Register 1, allowing per-output power gating.

Does CY28411ZXCT support spread spectrum on all clock outputs?

No-spread spectrum is applied only to CPU and SRC clock outputs (CPUT/CPUC and SRCT/SRCC) using the Lexmark profile. Dot clock (DOT96), USB_48, PCI, and REF outputs operate at fixed frequency without modulation.