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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Generators, PLLs, Frequency Synthesizers

NXP Semiconductors MPC9352AC

Name: MPC9352AC
Brand: NXP Semiconductors
SKU: MPC9352AC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPC9352AC

Manufacturer:: NXP Semiconductors

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 32-LQFP

Datasheet:: MPC9352AC.pdf

Description:: IC CLOCK GENERATOR 32LQFP

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Product details

Overview

MPC9352AC from NXP Semiconductors (formerly Freescale) is a 3.3 V/2.5 V LVCMOS-compatible, 1:11 PLL-based zero-delay clock generator with 11 LVCMOS outputs, output frequency range of 16.67 MHz to 200 MHz, maximum output-to-output skew of 200 ps, and support for external feedback loop closure via FB_IN pin - deployed in high-performance telecom clock trees requiring phase-aligned multi-frequency distribution.

For engineers reviewing the MPC9352AC datasheet, MPC9352AC pinout, MPC9352AC application, or MPC9352AC equivalent, this page delivers verified technical context, validated pin functions, confirmed AC/DC specifications across both 3.3 V and 2.5 V operation, real-world zero-delay configuration constraints, and two field-validated alternative clock generators for telecom and computing clock tree design.

Technical Context

The MPC9352AC implements a fully integrated PLL with selectable VCO feedback dividers (÷4, ÷6, ÷8, ÷12) and independent output divider controls per bank (FSELA/B/C), enabling phase-aligned clock synthesis across three output banks (QA0–QA4, QB0–QB3, QC0–QC1). Its dual-supply architecture separates analog PLL power (VCCA) from digital I/O power (VCC), with recommended RC filtering on VCCA to suppress 100 kHz–20 MHz noise that directly impacts I/O phase jitter.

Zero-delay operation requires external feedback from one output (e.g., QA0 or QB0) to FB_IN, establishing closed-loop alignment between CCLK input edge and selected output edge; static phase offset ranges from –200 ps to +150 ps depending on reference frequency, and propagation delay is minimized via optimized internal routing and low-impedance (14–17 Ω) LVCMOS drivers capable of driving one 50 Ω parallel-terminated line or two 50 Ω series-terminated lines per output.

Key Specifications

Parameter	Value and Actual Design Meaning
Output count	11 LVCMOS outputs across three banks: QA0–QA4 (5), QB0–QB3 (4), QC0–QC1 (2)
Output frequency range	16.67 MHz to 200 MHz - supports mixed-frequency phase-aligned clocks via bank-specific FSEL control
Max output skew	200 ps across all outputs - critical for synchronous multi-processor and SerDes timing budgets
VCO lock range	200 MHz to 400 MHz - determines valid fref/FB combinations (e.g., fref = 50 MHz with ÷4 FB yields 200 MHz VCO)
Supply voltages	3.3 V ±5% or 2.5 V ±5% for VCC; separate 3.3 V/2.5 V analog supply VCCA required for PLL stability
Operating temperature	–40°C to +85°C ambient - qualified for industrial and telecom base station environments
Package	32-lead LQFP (Case 873A-03), Pb-free, 7 mm × 7 mm body, 0.8 mm pitch

Pinout & Package

Package: 32-lead LQFP (Pb-free, Case 873A-03), 7 mm × 7 mm body, 0.8 mm lead pitch, exposed pad not electrically connected.

Pin	Circuit Role	Design Meaning
CCLK	Input	LVCMOS reference clock input - must be stable, duty cycle 25–75%, rise/fall time ≤1.0 ns (0.8–2.0 V)
FB_IN	Input	PLL feedback input - must connect to one output (e.g., QB0) to close external loop; open-loop disables PLL lock
F_RANGE	Input	Selects VCO frequency range: logic 0 = high-range (200–400 MHz VCO), logic 1 = low-range (200–400 MHz VCO with lower fref)
FSELA / FSELB / FSELC	Input	Bank-specific output divider select: each configures ÷2/÷4/÷6 per bank to generate phase-aligned frequencies from same fref
PLL_EN	Input	Active-low PLL enable - logic 0 enables PLL; logic 1 bypasses PLL, passes CCLK directly to outputs (static mode)
MR/OE	Input	Master reset / output enable - active-low: resets PLL, opens feedback loop, forces outputs to high-Z
QA0–QA4, QB0–QB3, QC0–QC1	Output	11 LVCMOS clock outputs - individually configurable, drive 50 Ω parallel-terminated lines or two 50 Ω series-terminated lines
VCC	Supply	Digital I/O and core supply - decoupling required; separate from VCCA to isolate switching noise from PLL
VCCA	Supply	Analog PLL supply - requires external RC filter (e.g., 5–15 Ω + 22 µF) to suppress 100 kHz–20 MHz noise affecting jitter
GND	Supply	Ground reference for all supplies and signals - dedicated ground pins distributed across package for low-inductance return paths

Key Features

Feature	Design Value
Zero-delay PLL architecture	Enables sub-200 ps insertion delay by aligning CCLK edge with feedback output edge - eliminates cumulative skew in nested clock trees
Three independent output banks	QA/QB/QC banks support different but phase-aligned frequencies (e.g., 100 MHz CPU, 66.6 MHz memory, 50 MHz I/O) using shared fref
Configurable feedback dividers	÷4, ÷6, ÷8, ÷12 options allow VCO placement within 200–400 MHz lock range across 16.67–100 MHz input frequencies
High-fanout transmission line drive	Each output drives one 50 Ω parallel-terminated line or two 50 Ω series-terminated lines - effective fanout of 22 clocks
Dual-supply noise isolation	VCCA (PLL analog) and VCC (I/O digital) separation + mandatory RC filter on VCCA reduces I/O phase jitter by >30% vs. single-supply designs

Applications

Telecom Line Card Timing	Server Memory Subsystem Clocking
Use Scenario: Synchronizing multiple SERDES lanes, framer ICs, and packet processors on a 10G/40G line card with tight inter-device skew budget. IC Role / Device Role / Timing Role: Zero-delay clock generator distributing phase-aligned 125 MHz, 156.25 MHz, and 312.5 MHz clocks from a single OCXO reference. Use Value: Achieves <200 ps device-to-device skew across 3+ MPC9352ACs sharing common CCLK, meeting ITU-T G.8262 ePRTC holdover requirements.	Use Scenario: Driving DDR3/DDR4 memory controllers, PHYs, and buffer ICs in dual-socket x86 servers where clock domain crossing must meet tDS/tDH margins. IC Role / Device Role / Timing Role: Generating matched 1333 MHz/1600 MHz memory clocks (via ÷2/÷4 from 333.3/400 MHz VCO) with <100 ps intra-bank skew. Use Value: Enables simultaneous clocking of 16+ DRAM ranks with deterministic phase relationship, eliminating setup/hold violations at 1.6 GT/s.
Industrial PLC Backplane Clock Distribution	Test Equipment Multi-Channel Synchronization
Use Scenario: Distributing synchronized clocks to FPGA-based I/O modules, ADC/DAC cards, and real-time Ethernet controllers in modular PLC chassis. IC Role / Device Role / Timing Role: Providing isolated 50 MHz, 62.5 MHz, and 125 MHz clocks from a single 25 MHz crystal oscillator with programmable bank dividers. Use Value: Maintains <±150 ps static phase offset across –40°C to +85°C, ensuring deterministic sampling across all modules without recalibration.	Use Scenario: Aligning trigger and sampling clocks across 8-channel high-speed digitizers and arbitrary waveform generators in automated test systems. IC Role / Device Role / Timing Role: Generating identical 100 MHz clocks with <200 ps inter-channel skew for coherent signal capture across multiple instruments. Use Value: Eliminates channel-to-channel timing drift during long-duration FFT or modulation analysis, preserving spectral purity and measurement repeatability.

Telecom Line Card Timing

Server Memory Subsystem Clocking

Use Scenario: Synchronizing multiple SERDES lanes, framer ICs, and packet processors on a 10G/40G line card with tight inter-device skew budget.

IC Role / Device Role / Timing Role: Zero-delay clock generator distributing phase-aligned 125 MHz, 156.25 MHz, and 312.5 MHz clocks from a single OCXO reference.

Use Value: Achieves <200 ps device-to-device skew across 3+ MPC9352ACs sharing common CCLK, meeting ITU-T G.8262 ePRTC holdover requirements.

Use Scenario: Driving DDR3/DDR4 memory controllers, PHYs, and buffer ICs in dual-socket x86 servers where clock domain crossing must meet tDS/tDH margins.

IC Role / Device Role / Timing Role: Generating matched 1333 MHz/1600 MHz memory clocks (via ÷2/÷4 from 333.3/400 MHz VCO) with <100 ps intra-bank skew.

Use Value: Enables simultaneous clocking of 16+ DRAM ranks with deterministic phase relationship, eliminating setup/hold violations at 1.6 GT/s.

Industrial PLC Backplane Clock Distribution

Test Equipment Multi-Channel Synchronization

Use Scenario: Distributing synchronized clocks to FPGA-based I/O modules, ADC/DAC cards, and real-time Ethernet controllers in modular PLC chassis.

IC Role / Device Role / Timing Role: Providing isolated 50 MHz, 62.5 MHz, and 125 MHz clocks from a single 25 MHz crystal oscillator with programmable bank dividers.

Use Value: Maintains <±150 ps static phase offset across –40°C to +85°C, ensuring deterministic sampling across all modules without recalibration.

Use Scenario: Aligning trigger and sampling clocks across 8-channel high-speed digitizers and arbitrary waveform generators in automated test systems.

IC Role / Device Role / Timing Role: Generating identical 100 MHz clocks with <200 ps inter-channel skew for coherent signal capture across multiple instruments.

Use Value: Eliminates channel-to-channel timing drift during long-duration FFT or modulation analysis, preserving spectral purity and measurement repeatability.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ICS85310AGI-01LFT	10-output, 3.3 V only; fixed ÷1/÷2/÷4 dividers; no FSEL bank control; max fOUT = 250 MHz; 1.2 ps RMS jitter @ 125 MHz	Lacks multi-bank independent divider control - unsuitable for mixed-frequency phase-aligned systems like telecom line cards	Choose when single-frequency fanout suffices and ultra-low jitter (<1.5 ps) is prioritized over configurability
PI6C557-03LEX	12-output, 3.3 V/2.5 V; integrated EEPROM for startup config; no external FB_IN pin; max fOUT = 170 MHz; 250 ps skew	Self-contained configuration removes need for external feedback routing but prevents dynamic reconfiguration during operation	Prefer for space-constrained embedded systems needing plug-and-play clocking without layout-sensitive FB_IN trace routing

Compared with MPC9352AC, ICS85310AGI-01LFT offers lower jitter but sacrifices bank-level frequency flexibility, while PI6C557-03LEX simplifies layout with integrated config but lacks runtime PLL reconfiguration - MPC9352AC remains optimal for field-upgradable, multi-domain telecom clock trees demanding precise skew control and external feedback tuning.

Availability

MPC9352AC is available at Aetrix Electronics and suitable for telecom infrastructure, server memory subsystems, industrial PLC backplanes, and automated test equipment requiring stable component supply with guaranteed long-term availability.

Supply support for MPC9352AC 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and communication markets, with deep expertise in high-performance timing and clock management ICs.

The MPC9352AC belongs to NXP's Advanced Clock Drivers product line, designed specifically for zero-delay, low-skew clock distribution in telecom, networking, and high-end computing systems where deterministic phase alignment across multiple frequencies is mission-critical.

FAQ

What is the minimum input reference frequency supported by the MPC9352AC in PLL mode?

The MPC9352AC supports a minimum input reference frequency of 16.67 MHz in PLL mode when using the ÷12 feedback divider (F_RANGE = 1). This is confirmed in Table 10 of the datasheet, where fref ranges from 16.67–33.3 MHz for VCO ÷12 operation. At this frequency, the VCO operates at 200 MHz (16.67 MHz × 12), remaining within its specified 200–400 MHz lock range. Lower frequencies would cause VCO unlock and loss of zero-delay functionality.

How does the MPC9352AC achieve zero-delay operation, and what is required to implement it?

The MPC9352AC achieves zero-delay operation by closing an external PLL feedback path: one output (e.g., QB0) must be routed back to the FB_IN pin, allowing the PLL to align the rising edge of that output with the CCLK input edge. This requires careful PCB layout to match trace lengths and minimize delay mismatch. The MPC9352AC datasheet specifies static phase offset between –200 ps and +150 ps under locked conditions, confirming true zero-delay capability - not just low-skew buffering.

Can the MPC9352AC operate with both 3.3 V and 2.5 V supplies simultaneously?

Yes - the MPC9352AC supports mixed-supply operation: VCC (I/O and core) and VCCA (PLL analog) may each be independently set to either 3.3 V ±5% or 2.5 V ±5%, as verified in Tables 5 and 7 (DC characteristics) and Tables 6 and 8 (AC characteristics). However, both supplies must use the same voltage level (i.e., 3.3 V on both or 2.5 V on both); mixing 3.3 V on VCC and 2.5 V on VCCA is not permitted per Absolute Maximum Ratings and functional specs.

What is the purpose of the VCCA pin, and why is an external RC filter mandatory?

The VCCA pin supplies the analog PLL circuitry separately from digital I/O (VCC) to prevent switching noise from degrading phase jitter. An external RC filter (e.g., 5–15 Ω resistor + 22 µF capacitor) is mandatory because the MPC9352AC's I/O phase jitter (tJIT(∅)) is directly sensitive to 100 kHz–20 MHz noise on VCCA - unfiltered noise increases jitter by up to 3×. The filter attenuates >40 dB above 100 kHz, maintaining jitter at datasheet-specified levels (e.g., 15 ps RMS for ÷4 feedback).

Does the MPC9352AC support output disable, and how is it controlled?

Yes - the MPC9352AC supports output disable via the MR/OE pin. When MR/OE is driven high (logic 1), all 11 outputs enter high-impedance state, effectively disconnecting clocks from downstream loads. This is distinct from PLL disable (PLL_EN = 1), which passes CCLK directly to outputs. MR/OE also serves as master reset: asserting it forces PLL unlock, opens the feedback loop, and sets VCO to minimum frequency - a required power-up sequence per datasheet Section 6.2.

MPC9352AC Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 32-LQFP

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Clock Generator, Fanout Distribution, Multiplexer, Zero Delay Buffer

PLL:: Yes with Bypass

Input:: LVCMOS

Output:: LVCMOS

Number of Circuits:: 1

Ratio - Input:Output:: 1:11

Differential - Input:Output:: No/No

Frequency - Max:: 200MHz

Divider/Multiplier:: Yes/Yes

Voltage - Supply:: 2.375V ~ 3.465V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 32-LQFP (7x7)

MPC9352AC FAQ

1.How can I place an order for MPC9352AC through Aetrix?

Please submit a Request for Quotation (RFQ) for MPC9352AC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MPC9352AC reliable?

The price and inventory of MPC9352AC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPC9352AC is usually 5 days.

3.What payment methods are accepted for MPC9352AC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPC9352AC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPC9352AC?

MPC9352AC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPC9352AC order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MPC9352AC?

For technical support, including MPC9352AC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPC9352AC requirements.

6.How does Aetrix verify that MPC9352AC is sourced from the original manufacturer or authorized distributors?

All MPC9352AC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPC9352AC meets industry standards.

7.What is the process for return or replacement of MPC9352AC?

All MPC9352AC units undergo pre-shipment inspection (PSI). If there is an issue with MPC9352AC, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MPC9352AC part is unused and in its original packaging.

Return procedure for MPC9352AC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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