MPC9229AC

Overview

The MPC9229AC is a 400 MHz low voltage PECL clock synthesizer IC manufactured by NXP USA Inc. (formerly Motorola/Freescale). It utilizes a fully integrated PLL with an on-chip crystal oscillator to generate differential LVPECL output signals ranging from 25 MHz to 400 MHz. The device operates on a single 3.3V supply and features separate power domains for the core logic/output drivers (VCC) and the internal PLL (VCC_PLL) to minimize noise-induced jitter. Configuration is supported via both parallel inputs for power-up settings and a serial 3-wire interface for dynamic programming.

Feature Summary

• Generates synthesized clock outputs from 25 MHz to 400 MHz using a fully integrated PLL and on-chip crystal oscillator.
• Provides differential LVPECL output signals capable of driving transmission lines terminated to VCC - 2.0 V.
• Supports dual configuration methods: parallel inputs for immediate power-up frequency setting and a serial 3-wire interface for runtime adjustments.
• Features isolated analog power supply (VCC_PLL) to reduce digital switching noise impact on phase-locked loop performance.

Applications

• High-performance telecom equipment requiring precise clock generation.
• Networking infrastructure devices demanding low-jitter timing solutions.
• Computing systems utilizing mid-range to high-performance processors.

Procurement Notes

Verify the specific suffix 'AC' against the manufacturer's current product status, as original documentation references Motorola and Freescale branding. Confirm that the component meets the required ambient temperature range of 0°C to +70°C for the intended application environment. Ensure compatibility with the specified 32-LQFP or 28-PLCC packaging options available for this part number.

Selection Notes

Select the MPC9229AC when a 3.3V compatible, low-voltage PECL clock source is required for frequencies up to 400 MHz. The device is suitable for designs needing minimal frequency overshoot and support for both static parallel configuration at startup and dynamic serial reprogramming. Consider the separate VCC_PLL pin requirement for proper power supply filtering to maintain specified jitter performance.

Part Context

This component belongs to the Motorola/Freescale MPC9229 family of clock synthesizers. It is functionally and pin-compatible with the MC12429. The technology platform utilizes SiGe processes to achieve high-speed operation and low jitter characteristics typical of telecommunications-grade timing solutions from the early 2000s.

Replacement Considerations

The MPC9229AC is pin and function compatible with the MC12429. Verify if other members of the MPC9229 series with different package suffixes (e.g., FN for PLCC) meet the mechanical footprint requirements.