NXP Semiconductors MPC8540CPX667JC

Overview

MPC8540CPX667JC from Freescale Semiconductor is a PowerQUICC™ III integrated host processor featuring a 667 MHz e500 core, 256 KB on-chip L2 cache/SRAM configurable as full cache, full SRAM, or split mode, DDR-1 SDRAM controller supporting up to 333 MHz data rate and 4 GB total capacity, dual three-speed (10/100/1000 Mbps) TSEC Ethernet controllers compliant with IEEE 802.3z/ab/ac/u, and PCI-X 64-bit interface operating at 133 MHz - deployed in carrier-grade wireless base stations and telecom line cards.

For engineers reviewing the MPC8540CPX667JC datasheet, MPC8540CPX667JC pinout, MPC8540CPX667JC application, or MPC8540CPX667JC equivalent, key selection criteria include e500 core frequency stability at 667 MHz, DDR-1 timing compliance under 2.5-V SSTL2 I/O, RapidIO 8-bit DDR interface latency, PCI-X 133 MHz agent/host coherency support, and thermal derating above 85°C ambient in dense packet-processing systems.

Technical Context

The MPC8540CPX667JC implements the Book E–enhanced Power Architecture e500 core with 32 KB L1 instruction and 32 KB L1 data caches (parity-protected), MMU optimized for embedded real-time OS environments, and performance monitor facility with eight 32-bit counters tracking up to 512 event types. Its OCeaN crossbar switch fabric routes traffic between TSECs, RapidIO, PCI-X, and DDR interfaces with priority-based packet reordering and starvation avoidance.

DDR SDRAM control uses programmable timing with full ECC on 64-bit boundaries, page-mode support (up to 16 open pages), and auto-refresh capability; the 256 KB L2 resource supports stashing from external masters and configurable locking per cache line or SRAM region. The RapidIO interface operates at 500 MHz data rate using LVDS signaling, with CRC-protected 256-byte packets and atomic increment/decrement/set/clear operations.

Key Specifications

Pinout & Package

Package: 783-pin Fine-Pitch Ceramic Ball Grid Array (FC-PBGA), 27 mm × 27 mm, 1.0 mm ball pitch, RoHS-compliant. Thermal pad on underside requires solder paste stencil aperture matching IPC-7351B standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated communications processor applications.

Compared with MPC8540CPX667JC, MPC8548CZQ667C adds security acceleration but removes RapidIO, while P1022NSN2HFB offers higher core performance and DDR3 but abandons RapidIO entirely - making MPC8540CPX667JC uniquely suited for cost-sensitive, RapidIO-dependent telecom infrastructure upgrades.

Availability

MPC8540CPX667JC is available at Aetrix Electronics and suitable for wireless infrastructure, carrier Ethernet aggregation, and telecom line card applications requiring stable component supply across extended product lifecycles.

Supply support for MPC8540CPX667JC 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) designed high-performance Power Architecture processors for networking, telecom, and industrial control applications before its 2015 acquisition.

The MPC8540CPX667JC belongs to the PowerQUICC™ III family, engineered specifically for carrier-grade communications infrastructure requiring integrated processing, high-speed interconnects, and deterministic real-time behavior.

FAQ

What is the maximum DDR-1 data rate supported by the MPC8540CPX667JC?

The MPC8540CPX667JC supports DDR-1 SDRAM at up to 333 MHz data rate (166 MHz clock), delivering 5.3 GB/s peak bandwidth across its 64-bit interface. This is confirmed in Section 6 of the Hardware Specifications document, which specifies programmable timing for DDR-1 operation with full ECC and page-mode support. The MPC8540CPX667JC achieves this rate using 2.5-V SSTL2 I/O signaling and requires MVREF = GVDD/2 ±2% for stable operation.

Does the MPC8540CPX667JC support PCI Express?

No, the MPC8540CPX667JC does not support PCI Express. It implements PCI 2.2 and PCI-X 1.0 interfaces only, with 64-bit operation up to 133 MHz. PCI Express capability was introduced in later NXP QorIQ families such as P1/P2 series. The MPC8540CPX667JC's PCI-X controller supports dual-address-cycle (DAC) transactions and memory prefetching but lacks PCIe's serial point-to-point topology, transaction layer, or configuration space extensions.

What package type and pin count does the MPC8540CPX667JC use?

The MPC8540CPX667JC uses a 783-pin Fine-Pitch Ceramic Ball Grid Array (FC-PBGA) package measuring 27 mm × 27 mm with 1.0 mm ball pitch. This is explicitly stated in Section 14 ("Package and Pin Listings") of the Hardware Specifications document. The FC-PBGA construction provides thermal reliability for sustained operation at 105°C junction temperature in telecom equipment.

Can the MPC8540CPX667JC operate with DDR2 or DDR3 memory?

No, the MPC8540CPX667JC supports DDR-1 SDRAM only. Its DDR controller is electrically and logically designed for DDR-1 timing parameters, 2.5-V SSTL2 signaling, and specific command encoding (e.g., ACTIVATE/PRECHARGE). DDR2 and DDR3 require different voltage levels (1.8 V and 1.5 V), termination schemes (SSTL18/SSTL15), and protocol states not implemented in the MPC8540CPX667JC's memory controller hardware.

What is the function of the OCeaN switch fabric in the MPC8540CPX667JC?

The OCeaN (On-Chip Ethernet and Networking) switch fabric is a four-port crossbar packet switch that arbitrates and routes traffic between the TSECs, RapidIO, PCI-X, and DDR interfaces. It implements priority-based packet reordering, starvation avoidance algorithms, and payload buffering up to 256 bytes - enabling concurrent high-bandwidth transfers without bus contention. This is detailed in Section 1.1 ("Key Features") of the Hardware Specifications document.