NXP Semiconductors MPC9352FA

Overview

MPC9352FA from NXP Semiconductors (formerly Freescale) is a 3.3 V/2.5 V LVCMOS 1:11 zero-delay clock generator IC used as a high-precision PLL-based clock tree driver in telecom and computing systems. It delivers 11 LVCMOS outputs with frequencies from 16.67 MHz to 200 MHz, output skew ≤200 ps, and supports configurable division ratios (1, 2, 3, 3÷2, 2÷3, 1÷3, 1÷2) across three independent banks (QA0–4, QB0–3, QC0–1).

For engineers reviewing the MPC9352FA datasheet, MPC9352FA pinout, MPC9352FA application, or MPC9352FA equivalent, this page provides verified functional identity, validated 32-pin LQFP package mapping, confirmed zero-delay PLL architecture, real-world skew/jitter specs (tsk(O) ≤200 ps, tJIT(∅) ≤25 ps), and two field-validated alternative clock generators for telecom clock distribution designs.

Technical Context

The MPC9352FA implements a fully integrated, external-loop PLL with selectable VCO feedback dividers (÷4, ÷6, ÷8, ÷12) and bank-specific output dividers controlled by FSELA/FSELB/FSELC pins. Its dual-supply architecture separates analog PLL power (VCCA) from digital I/O power (VCC), requiring an external RC filter on VCCA to suppress 100 kHz–20 MHz noise that directly impacts I/O phase jitter.

Zero-delay operation is achieved by routing one output (e.g., QA4 or QB0) back to FB_IN, closing the external feedback loop; propagation delay t(∅) is statically trimmed to –200 ps to +150 ps depending on input frequency, enabling sub-200 ps insertion delay in nested clock trees. All 11 outputs drive 50 Ω parallel-terminated lines or up to two 50 Ω series-terminated lines per output, delivering effective fanout of 22.

Key Specifications

Pinout & Package

Package: 32-lead LQFP (Case 873A-03), 7 mm × 7 mm body, 0.8 mm pitch, exposed pad not present. Pin 1 index located at top-left corner with notch marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ICS853S111AGI and PI6C557-03LEX, the MPC9352FA uniquely supports external zero-delay feedback, triple-bank independent division, and dual-supply noise isolation-making it the only option among the three qualified for telecom base station clock trees demanding <25 ps phase jitter and <200 ps inter-output skew.

Availability

MPC9352FA is available at Aetrix Electronics and suitable for telecom infrastructure, server motherboard design, and high-speed test equipment requiring stable component supply, long-lifecycle support, and guaranteed Pb-free compliance.

Supply support for MPC9352FA 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 communications markets, with deep heritage in timing and clock management IP from its Freescale acquisition.

The MPC9352FA belongs to NXP's Advanced Clock Drivers product line, designed specifically for high-performance, low-skew clock distribution in telecom base stations, enterprise switches, and computing platforms requiring zero-delay PLL operation and multi-frequency phase alignment.

FAQ

What is the maximum output frequency supported by the MPC9352FA?

The MPC9352FA supports a maximum output frequency of 200 MHz, achievable when configured with ÷2 output division and VCO operating in the 200–400 MHz lock range. This occurs with F_RANGE = 0 and appropriate FSEL settings (e.g., FSELA = 1, FSELB = 0, FSELC = 0 yielding QA outputs at 2× fref). The device maintains ≤200 ps output skew and ≤100 ps cycle-to-cycle jitter even at 200 MHz, as verified in Table 6 AC Characteristics under VCC = 3.3 V conditions.

How does the MPC9352FA achieve zero-delay operation?

The MPC9352FA achieves zero-delay operation by closing an external PLL feedback loop: one output (e.g., QB0 or QA4) is routed back to the FB_IN pin. The internal PLL aligns the rising edge of that feedback signal with the CCLK input edge, resulting in near-zero net insertion delay. Static phase offset t(∅) is trimmed to –200 ps to +150 ps, and combined with ≤200 ps output skew, yields effective insertion delay <395 ps (at ±3σ) - verified in Application Information section "Using the MPC9352 in Zero-Delay Applications".

Why does the MPC9352FA require separate VCCA and VCC supplies?

The MPC9352FA uses separate VCCA (analog PLL supply) and VCC (digital I/O supply) to isolate sensitive PLL circuitry from digital switching noise. Noise on VCCA directly increases I/O phase jitter (tJIT(∅)), as confirmed in Power Supply Filtering section. The datasheet mandates an external RC filter (5–15 Ω + 22 µF) on VCCA to attenuate 100 kHz–20 MHz noise by >40 dB - a requirement absent in single-supply clock generators like PI6C557-03LEX, making MPC9352FA uniquely suited for jitter-critical telecom applications.

Can the MPC9352FA drive multiple transmission lines per output?

Yes, each MPC9352FA output can drive up to two 50 Ω series-terminated transmission lines due to its low 14–17 Ω output impedance. This capability is explicitly documented in Functional Description ("each output can drive up to two series terminated transmission lines") and Figure 10/11. Simulations show only 43 ps delay delta between single- and dual-line loading, preserving tight skew. Driving two lines doubles effective fanout to 22 without violating AC specs - a key advantage over fixed-fanout alternatives.

What is the purpose of the F_RANGE pin on the MPC9352FA?

The F_RANGE pin selects the VCO feedback divider ratio group: logic 0 enables ÷4/÷6 feedback (for 50–100 MHz CCLK inputs), logic 1 enables ÷8/÷12 feedback (for 16.67–50 MHz inputs). This ensures the VCO operates within its specified 200–400 MHz lock range regardless of reference frequency. Table 9 and Table 10 confirm F_RANGE determines valid fref ranges and corresponding output configurations - incorrect F_RANGE setting causes loss of PLL lock, triggering MR/OE reset requirement per Table 2.