NXP Semiconductors MPC93R52FA

Overview

MPC93R52FA from NXP Semiconductors (formerly Freescale) is a 3.3 V LVCMOS 1:11 PLL-based zero-delay clock generator designed for high-performance clock tree distribution in telecom, networking, and computing systems. It delivers 11 configurable LVCMOS outputs with frequencies from 16.67 MHz to 240 MHz, output skew <200 ps, and supports external feedback for true zero-insertion-delay operation.

For engineers reviewing the MPC93R52FA datasheet, MPC93R52FA pinout, MPC93R52FA application, or MPC93R52FA equivalent, this page provides verified technical context, real-world timing performance data, bank-specific frequency configuration logic, VCCA filtering guidance, and validated alternatives for clock tree design continuity.

Technical Context

The MPC93R52FA implements a fully integrated analog PLL with VCO lock range of 200–480 MHz, optimized for low-jitter operation without external loop filter components. Its three independent output banks (QA0–QA4, QB0–QB3, QC0–QC1) are individually programmable via FSELA/B/C pins to generate phase-aligned but frequency-divided clocks (e.g., ÷2, ÷3, ÷4, ÷6, ÷8, ÷12) from a single reference input.

Zero-delay functionality is achieved by routing one output (e.g., QA4 or QB0) back to FB_IN to close the external PLL feedback path; propagation delay compensation is handled internally, yielding static phase offset between –100 ps and +200 ps. The device separates analog (VCCA) and digital (VCC) supplies to isolate PLL sensitivity from switching noise, requiring an external RC filter on VCCA per Freescale AN1091 recommendations.

Key Specifications

Pinout & Package

32-lead LQFP package (Case 873A-03), Pb-free compliant, 7 mm × 7 mm body, 0.8 mm lead pitch. Thermal pad not electrically connected; recommended solder mask defined for thermal relief.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC100EP137 and ICS853S111, the MPC93R52FA uniquely combines LVCMOS compatibility, external feedback for zero-delay operation, and per-bank programmable division - making it irreplaceable in applications demanding sub-200 ps skew and phase-aligned multi-frequency clock synthesis from a single reference.

Availability

MPC93R52FA is available at Aetrix Electronics and suitable for telecom infrastructure, network switch fabric, and server memory subsystems requiring stable component supply, long-term lifecycle support, and consistent electrical performance across production batches.

Supply support for MPC93R52FA 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 acquired Freescale in 2015 and maintains legacy clock driver product lines including the MPC93R52FA. NXP is a global leader in secure connectivity solutions for automotive, industrial, and communications markets.

The MPC93R52FA belongs to Freescale's Advanced Clock Drivers family, engineered specifically for high-speed, low-skew clock distribution in telecom and computing infrastructure where deterministic phase alignment and zero-insertion-delay operation are mandatory.

FAQ

What is the maximum output frequency supported by the MPC93R52FA?

The MPC93R52FA supports a maximum output frequency of 240 MHz, achievable when configured with ÷2 output division and VCO operating in the 200–480 MHz lock range (e.g., F_RANGE = 0, FSELC = 0, feedback ÷4). This occurs with a 120 MHz reference input on CCLK. All AC specifications, including skew and jitter, are guaranteed at this frequency under specified conditions (VCC = 3.3 V ±5%, TA = 0°C to +70°C).

How does the MPC93R52FA achieve zero-delay operation?

The MPC93R52FA achieves zero-delay operation by routing one of its outputs (e.g., QA4 or QB0) back to the FB_IN pin to close the external PLL feedback loop. This allows the internal PLL to align the rising edge of the feedback signal with the CCLK reference edge, effectively canceling propagation delay. Static phase offset is bounded at –100 ps to +200 ps, and the device requires MR/OE reset after any loss of PLL lock to restore synchronization.

Why is an RC filter required on the VCCA pin of the MPC93R52FA?

An RC filter on the VCCA pin is required because VCCA powers the analog PLL circuitry, which is highly sensitive to power supply noise-especially in the 100 kHz to 20 MHz band. Without filtering, noise on VCCA directly increases I/O phase jitter (t_JIT(∅)). Freescale specifies R_F = 5–25 Ω and C_F = 22 µF + 33–100 nF to achieve >40 dB attenuation above 100 kHz while maintaining ≥2.98 V on VCCA under max ICCA (5 mA).

Can the MPC93R52FA drive multiple transmission lines simultaneously?

Yes, each MPC93R52FA output can drive up to two 50 Ω series-terminated transmission lines (fanout = 22 total), unlike parallel termination which limits to one line per output due to DC current draw. Simulations show only 43 ps delay delta between single and dual-line loading, preserving tight output-to-output skew. For optimal impedance matching with dual lines, reduce series termination resistors from 36 Ω to 22 Ω per line.

What is the function of the F_RANGE pin on the MPC93R52FA?

The F_RANGE pin selects the VCO frequency range: logic 0 configures ÷1 feedback (VCO = 200–480 MHz), supporting reference inputs from 50–120 MHz; logic 1 configures ÷2 feedback (VCO = 100–240 MHz), supporting lower reference inputs from 16.67–60 MHz. This selection determines valid combinations of FSELA/B/C settings and output divider ratios per Tables 7 and 8 in the datasheet - incorrect F_RANGE setting prevents PLL lock.