NXP Semiconductors MPC603RRX266LC

Overview

MPC603RRX266LC from Freescale Semiconductor is a 266 MHz PowerPC 603e RISC microprocessor implemented in 0.29 µm CMOS, featuring a 2.5 V core supply, 3.3 V I/O supply, 16-Kbyte instruction and data caches, five execution units (IU, FPU, BPU, LSU, SRU), and four power-saving modes (doze, nap, sleep, dynamic idle). It targets embedded control and communications systems requiring low-power 32-bit processing with full PowerPC architecture compliance.

For engineers reviewing the MPC603RRX266LC datasheet, MPC603RRX266LC pinout, MPC603RRX266LC application, or MPC603RRX266LC equivalent, key selection criteria include its 266 MHz core frequency at 2.5 V, CBGA-255 package, 32-bit address/64-bit data bus support, IEEE 754-compliant FPU, and JTAG boundary-scan debug capability.

Technical Context

The MPC603RRX266LC implements the PowerPC 603e architecture with superscalar execution-capable of issuing and retiring up to three instructions per clock while executing five in parallel. Its five independent execution units (integer, floating-point, branch, load/store, system register) enable single-cycle integer execution and pipelined FPU operations for single-precision multiply-add every cycle.

It integrates physically addressed, four-way set-associative 16-Kbyte instruction and data caches with LRU replacement, dual 64-entry two-way set-associative TLBs (ITLB/DTLB), and four-entry IBAT/DBAT arrays supporting block translation. The on-chip PLL supports configurable clock multipliers (2:1 to 6:1) and internal 2.5/3.3-V power domains with dynamic functional-unit power gating.

Key Specifications

Pinout & Package

The MPC603RRX266LC is housed in a 255-ball Ceramic Ball Grid Array (CBGA) package with 21 mm × 21 mm footprint, 1.27 mm ball pitch, and 2.45–3.00 mm height. It shares identical pinout with the PBGA variant but is rated for 266 MHz operation (PBGA limited to 200 MHz).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC603E and MPC8245, the MPC603RRX266LC offers superior power efficiency at 266 MHz due to its 0.29 µm process and dynamic idle mode, while retaining full backward compatibility with PowerPC 603e software-making it optimal for thermally constrained upgrades of legacy 603-based platforms.

Availability

MPC603RRX266LC is available at Aetrix Electronics and suitable for industrial motion controllers, telecom line cards, avionics display processors, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for MPC603RRX266LC 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 Semiconductors) is a fabless semiconductor company specializing in embedded processing, analog, and connectivity solutions for automotive, industrial, and networking markets.

The MPC603RRX266LC belongs to the PowerPC 603e family-designed specifically for cost-sensitive, low-power 32-bit embedded applications where deterministic real-time performance and long-term availability outweigh raw computational throughput.

FAQ

What is the maximum guaranteed operating frequency of the MPC603RRX266LC?

The MPC603RRX266LC is factory-sorted and tested to operate reliably at a maximum core frequency of 266 MHz under specified conditions: Vdd = 2.5 ± 5% V, OVdd = 3.3 ± 5% V, and die-junction temperature ≤ 105 °C. This rating is validated per Table 7 in the PID7t-603e Hardware Specifications document, with SYSCLK input at 75 MHz and PLL_CFG[0–3] configured for 3.5:1 multiplication.

Does the MPC603RRX266LC support JTAG boundary-scan debugging?

Yes, the MPC603RRX266LC fully supports IEEE 1149.1 JTAG boundary-scan via dedicated pins (TCK, TMS, TDI, TDO, TRST). As documented in Section 4.3 and Figure 5–8 of the hardware specifications, it operates up to 16 MHz TCK frequency and provides complete pin-level visibility for in-circuit test and emulation-critical for validating complex PCB interconnects in safety-critical MPC603RRX266LC deployments.

What power-saving modes are implemented in the MPC603RRX266LC?

The MPC603RRX266LC implements four distinct power-saving modes: doze (reduces clock distribution power), nap (gates core clocks while preserving state), sleep (shuts down PLL and most logic), and dynamic idle (automatically powers down unused execution units). Per Table 6, sleep mode draws just 90 mW at 266 MHz-enabling fanless operation in sealed industrial enclosures where thermal management is constrained.

Is the MPC603RRX266LC pin-compatible with other PowerPC 603e variants?

The MPC603RRX266LC uses the same 255-ball CBGA package and identical pinout as all PID7t-603e derivatives-including MPC603R and XPC603P-per Table 11 and Figure 9. However, it is not pin-compatible with earlier PID6-603e (MPC603E) due to differing core voltage requirements (2.5 V vs. 3.3 V) and incompatible PLL_CFG signal interpretations, necessitating board-level voltage rail changes.

What memory management features does the MPC603RRX266LC provide?

The MPC603RRX266LC integrates dual 64-entry, two-way set-associative TLBs (ITLB/DTLB) and four-entry IBAT/DBAT arrays for block address translation. These enable demand-paged virtual memory with 4-Kbyte pages, variable block sizes (128 Kbyte to 256 Mbyte), and 256-Mbyte segment addressing-all compliant with the PowerPC architecture specification and validated in the MPC603RRX266LC's MMU implementation per Section 3 of the hardware spec.