NXP Semiconductors MPC603RRX300LC

Overview

MPC603RRX300LC from Freescale Semiconductor (formerly Motorola) is a 32-bit PowerPC 603e RISC microprocessor with 300 MHz CPU frequency, 2.5 V ±5% core supply, and operation over 0°C to 105°C junction temperature. It implements a five-stage pipeline, on-chip 8 KB instruction and 8 KB data cache, and supports hardware/software coherency protocols in multiprocessor systems.

For engineers reviewing the MPC603RRX300LC datasheet, MPC603RRX300LC pinout, MPC603RRX300LC application, or MPC603RRX300LC equivalent, key selection criteria include thermal operating range, cache coherency behavior under snoop sequences, dcbz broadcast handling, and errata mitigation for lwarx/stwcx live-lock and touch-load address corruption.

Technical Context

The MPC603RRX300LC implements a superscalar, five-stage integer pipeline with dual-issue capability and integrated MMU. It supports both software-managed and hardware-snooped cache coherency, requiring explicit handling of dcbi broadcast timing and dcbz retry behavior per documented errata.

Its memory subsystem includes separate 8 KB instruction and 8 KB data caches, write-through or copy-back modes, and support for BAT- and PTE-based memory space attributes including global/non-global marking to control dcbz broadcast behavior.

Key Specifications

Pinout & Package

This device uses a 255-pin Ceramic Ball Grid Array (CBGA) package with 1.27 mm pitch and 27 × 27 mm body size. Pin assignment follows the standard MPC603e BGA footprint defined in MPC603REC/D.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RISC microprocessor applications.

Compared with MPC603RRX266LC and MPC603RRX300TC, the MPC603RRX300LC delivers highest clock speed within the commercial temperature grade, offering optimal performance-per-watt for indoor industrial and networking equipment where ambient stays above 0°C.

Availability

MPC603RRX300LC is available at Aetrix Electronics and suitable for embedded network routers, industrial motion controllers, and legacy workstation upgrades requiring stable component supply and long-term obsolescence management.

Supply support for MPC603RRX300LC 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

Freescale Semiconductor (now part of NXP) was a leading designer of embedded processors, digital signal processors, and analog/mixed-signal ICs for automotive, industrial, and networking markets.

The MPC603e family was developed as a low-power, high-performance 32-bit RISC microprocessor line targeting cost-sensitive embedded systems requiring PowerPC architecture compatibility and thermal efficiency.

FAQ

What is the maximum junction temperature specification for MPC603RRX300LC?

The MPC603RRX300LC is rated for a junction temperature range of 0°C to 105°C. This defines the allowable silicon die temperature during operation and dictates heatsink thermal resistance and airflow requirements. Exceeding 105°C risks timing violations and accelerated electromigration. The MPC603RRX300LC must be thermally managed using validated PCB layout practices, including thermal vias under the CBGA body and copper pour on adjacent layers.

Does MPC603RRX300LC support hardware cache coherency?

Yes, the MPC603RRX300LC supports hardware cache coherency via bus snooping protocols. It implements snoop response logic for copyback and write-through cache lines, enabling multiprocessor systems to maintain consistent data across local caches. However, designers must implement errata mitigations-such as disabling dcbz broadcast in global memory regions-to prevent indefinite snoop retries, as documented in the PID7v-603e specification for MPC603RRX300LC.

Is MPC603RRX300LC pin-compatible with earlier MPC603r revisions?

Yes, the MPC603RRX300LC uses the same 255-pin CBGA package and pinout as prior MPC603r revisions, including MPC603RRX266LC and MPC603RRX200LC. No PCB redesign is required for upgrade. All signal assignments, power/ground ball locations, and thermal pad configuration match the MPC603REC/D hardware specification, making MPC603RRX300LC a direct drop-in replacement where thermal and voltage compliance are maintained.

What errata apply specifically to MPC603RRX300LC?

The MPC603RRX300LC inherits all errata from PID7v-603e Revision 2.1, including: (1) dcbi broadcasting wrong address during snoop copyback windows; (2) lwarx/stwcx live-lock under bus address pipelining; (3) dcbt issuing random addresses after MMU exceptions; (4) write-thru + dcbz + snoop causing cache incoherency; and (5) dcbz broadcast retrying snoop accesses indefinitely. These are documented in the official Freescale specification for MPC603RRX300LC and require firmware-level workarounds.

What is the core supply voltage requirement for MPC603RRX300LC?

The MPC603RRX300LC requires a tightly regulated 2.5 V ±5% (2.375 V to 2.625 V) core supply on VDD_CORE pins. Deviation beyond this range may cause instruction corruption or pipeline stalls. The MPC603RRX300LC draws peak current exceeding 3 A during burst execution, necessitating low-ESR ceramic decoupling capacitors placed within 5 mm of each VDD_CORE ball and a dedicated 2.5 V regulator with <10 mV ripple.