MPC9230FN

Overview

The MPC9230 is a low voltage PECL clock synthesizer designed for high-performance telecom, networking, and computing applications. It generates synthesized clock outputs ranging from 50 MHz to 800 MHz using differential LVPECL signals. The device features an internal crystal oscillator or supports an external reference input, with a VCO operating between 800 MHz and 1600 MHz. It utilizes a fully integrated PLL and offers both serial 3-wire and parallel programming interfaces for configuring the feedback (M) and post-divider (N) counters. Powered by a single 3.3 V supply, it employs SiGe technology and includes separate power domains for digital logic and the analog PLL to minimize noise-induced jitter.

Feature Summary

• Synthesized output frequencies from 50 MHz to 800 MHz with differential LVPECL outputs
• Internal crystal oscillator supporting 10–20 MHz inputs or alternative LVCMOS compatible reference clock input
• Dual configuration options via serial 3-wire interface and parallel M/N inputs
• Separate VCC_PLL and VCC power supplies to isolate analog PLL noise from digital switching

Applications

• High-performance telecommunications systems
• Networking equipment requiring precise clock generation
• Computing applications demanding low-jitter clock signals

Procurement Notes

Verify package suffixes against ordering requirements: FN denotes 32-lead LQFP, FA denotes 32-lead LQFP Pb-free, EI denotes 28-lead PLCC, and AC denotes 28-lead PLCC Pb-free. Confirm ambient temperature range specifications, as VCO frequency limits differ between -40°C to +85°C and 0°C to +70°C. Ensure compatibility with existing board layouts regarding pin functions and power supply filtering requirements.

Selection Notes

Select the appropriate package based on board space constraints; the 28-lead PLCC and 32-lead LQFP are available in standard and Pb-free variants. Consider the operating temperature range when determining maximum output frequency capabilities, as the 800 MHz limit applies only up to 70°C. Ensure the chosen crystal matches the series resonance requirement and specified shunt capacitance (5–7 pF) for optimal oscillator performance.

Part Context

The MPC9230 is part of Freescale Semiconductor's advanced clock driver and synthesizer portfolio, utilizing SiGe technology for high-speed performance. It serves as a direct pin-and-function compatible replacement for the MC12430, allowing for straightforward upgrades in existing designs requiring enhanced clock synthesis capabilities within the same form factor.

Replacement Considerations

The MPC9230 is pin and function compatible with the MC12430. When substituting, verify that the application design accommodates the specific power supply filtering recommendations for the VCC_PLL pin to maintain jitter specifications.