Infineon Technologies CY24488ZXCT

Overview

CY24488ZXCT from Infineon Technologies (formerly Cypress) is a quad-PLL clock generator with two-wire serial interface, designed for multi-domain timing synthesis in digital video/audio systems. It delivers three independent programmable output frequencies (4.9152–148.5 MHz), buffered reference output, and analog VCXO tuning (±120 ppm typical pull range) using a 27 MHz crystal or input clock. Key applications include HDMI audio clocks (25.175 MHz), video pixel clocks (74.25/148.5 MHz), USB (48 MHz), and Ethernet (25 MHz).

For engineers reviewing the CY24488ZXCT datasheet, CY24488ZXCT pinout, CY24488ZXCT application, or CY24488ZXCT equivalent, this page provides verified technical context, validated pin functions, confirmed output frequency configurations per application domain, and real-world selection guidance for digital set-top box, DTV, and multimedia SoC timing subsystems.

Technical Context

The CY24488ZXCT integrates four independent PLLs-three synthesizing primary outputs (CLKC/D/E) and one dedicated to VCXO control-with fully configurable dividers/multiplexers enabling unrelated frequency generation. Its two-wire serial interface (SCLK/SDAT) supports volatile register programming for output enable/disable, drive strength (2-level), VCXO on/off, and crystal load capacitance selection (10.7–14 pF).

It operates at 3.3 V with dual output supply domains (VDD1 for CLKC; VDD2 for CLKD/E/F/G), supports both pullable (VCXO mode) and non-pullable crystals, and defaults to CLKG outputting 27 MHz at power-on-requiring serial reconfiguration for all other outputs.

Key Specifications

Pinout & Package

16-pin TSSOP package (JEDEC MO-153AC), 0.65 mm pitch, body size 4.4 mm × 5.0 mm, 1.2 mm max height. Thermal pad not included; standard reflow profile applies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY22388ZXC and ICS843002AGLFT, the CY24488ZXCT uniquely balances consumer-targeted frequency coverage (HDMI/USB/audio), analog VCXO tunability, and volatile serial reprogrammability-making it optimal for DTV and multimedia SoC timing where field updates and ppm-level tuning matter.

Availability

CY24488ZXCT is available at Aetrix Electronics and suitable for digital television, HDMI audio/video synchronization, and USB 2.0 peripheral clocking requiring stable component supply across extended product lifecycles.

Supply support for CY24488ZXCT 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, automotive microcontrollers, and timing solutions.

The CY24488ZXCT belongs to Infineon's legacy Cypress timing portfolio, engineered specifically for multi-standard consumer electronics requiring flexible, low-jitter clock synthesis from a single 27 MHz reference.

FAQ

What is the default power-on behavior of the CY24488ZXCT?

At power-up, only CLKG outputs a buffered 27 MHz reference clock; all other outputs (CLKC–CLKF) are disabled and drive low. Serial programming via SCLK/SDAT is mandatory to configure frequencies, enable outputs, or adjust VCXO settings-no factory-programmed non-volatile memory is present.

Can the CY24488ZXCT generate 100 MHz and 148.5 MHz simultaneously?

Yes. CLKE supports 100 MHz for processor clocks (register address 13H–15H = 07 26 30 DE), and CLKD supports 148.5 MHz for video pixel clocks (12H = 2C, 53H = B2). Both derive from independent PLLs sharing the same 27 MHz reference, enabling truly unrelated frequency synthesis without jitter coupling.

How is VCXO functionality disabled safely?

To disable VCXO, tie VIN (Pin 4) to AVDD (3.3 V), then program register 0x17 bits [1:0] = '00' (per Table 1, "Crystal, VCXO off" mode). This disables analog tuning while preserving full PLL synthesis capability-no crystal pullability constraints apply in this configuration.

Does the CY24488ZXCT support 2.5 V output signaling?

Yes. The output buffers support 2.5 V operation when VDD1 and VDD2 are supplied at 2.5 V instead of 3.3 V. This is explicitly documented in the "DC Parameters" section (page 15) and requires matching PCB termination-no register configuration is needed beyond proper supply voltage routing.