NXP Semiconductors MPC8540VT667LC

Overview

MPC8540VT667LC from NXP (formerly Freescale) is a PowerQUICC™ III integrated host processor featuring a 667 MHz e500 Power Architecture™ core, 256 KB configurable L2 cache/SRAM, dual 10/100/1000 Mbps TSEC Ethernet controllers, DDR-1 SDRAM controller (64-bit, 333 MHz), PCI/PCI-X (64-bit, 133 MHz), RapidIO (8-bit, 500 MHz), and OCeaN packet switch - deployed in carrier-grade networking line cards and telecom infrastructure.

For engineers reviewing the MPC8540VT667LC datasheet, MPC8540VT667LC pinout, MPC8540VT667LC application, or MPC8540VT667LC equivalent, key selection criteria include its 667 MHz core frequency, 783-pin FC-PBGA package, DDR-1 memory interface timing compliance, dual TSEC gigabit Ethernet support with RGMII/TBI, and Power Architecture Book E instruction set compatibility for real-time embedded control.

Technical Context

The MPC8540VT667LC implements a fully static 1.2 V core (VDD) with 2.5 V DDR I/O (GVDD), 3.3 V peripheral I/O (OVDD), and 3.3/2.5 V Ethernet I/O (LVDD), supporting doze/nap/sleep power states. Its e500 core includes 32 KB L1 instruction and 32 KB L1 data caches with parity, MMU optimized for embedded OS use, and performance monitor facility with eight 32-bit event counters.

System-level integration includes a 256 KB L2 resource configurable as full cache, full SRAM, or split mode with full ECC on 64-bit boundaries; DDR-1 controller with four banks, page-mode support, auto-refresh, and CKE-based power management; and dual TSECs compliant with IEEE 802.3z/ab/ac standards and backward-compatible buffer descriptor programming versus MPC8260/MPC860T.

Key Specifications

Pinout & Package

Package: 783-pin FC-PBGA (27 mm × 27 mm, 1.0 mm ball pitch), thermally enhanced with exposed die paddle. Pinout defined across 14 functional groups including DDR address/data/control, TSEC MDIO/MII/GMII signals, PCI/PCI-X AD/C/BE#, RapidIO differential pairs (RIO_TXP/N, RIO_RXP/N), JTAG TCK/TMS/TDI/TDO, and dedicated reset (HRESET, SRESET) and clock inputs (SYSCLK, EC_GTX_CLK125, RIO_TX_CLK_IN).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC8548ECV667LB, MPC8540VT667LC omits security acceleration but reduces power and cost; compared with P1022NSEALFHB, it retains RapidIO and PCI-X compatibility while offering proven qualification for telecom temperature and reliability requirements.

Availability

MPC8540VT667LC is available at Aetrix Electronics and suitable for wireless infrastructure, carrier Ethernet, and industrial protocol gateway applications requiring stable component supply across extended product lifecycles.

Supply support for MPC8540VT667LC 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 networking markets, formed from the spin-off of Freescale Semiconductor in 2015.

The MPC8540VT667LC belongs to the PowerQUICC™ III family, designed specifically for high-performance, integrated control-plane processing in networking and telecommunications infrastructure where deterministic latency, multi-interface concurrency, and long-term availability are critical.

FAQ

What is the maximum DDR-1 SDRAM data rate supported by the MPC8540VT667LC?

The MPC8540VT667LC supports a maximum DDR-1 SDRAM data rate of 333 MHz (166 MHz clock, double-data-rate), delivering up to 2.7 GB/s peak bandwidth on its 64-bit interface. This is confirmed in Section 6 of the MPC8540 Hardware Specifications Rev. 4.1, which specifies programmable timing for DDR-1 only - DDR2 or DDR3 are not supported. The MPC8540VT667LC requires 2.5 V GVDD and precise MVREF = GVDD/2 alignment for reliable operation at this rate.

Does the MPC8540VT667LC support PCI Express?

No, the MPC8540VT667LC does not support PCI Express. It implements a PCI 2.2 and PCI-X 1.0 compliant controller with 64-bit bus width and up to 133 MHz operation, as documented in Section 12 of the MPC8540 Hardware Specifications. PCI Express capability was introduced in later NXP families such as QorIQ P-series; the MPC8540VT667LC's PCI-X interface is electrically and protocol-incompatible with PCIe slots or endpoints.

What boot sources are supported by the MPC8540VT667LC at power-on reset?

The MPC8540VT667LC supports booting from serial ROM via its I2C interface using the integrated boot sequencer, as described in Section 1.1 and Chapter 19 of the reference manual. It also supports local bus boot from NOR flash or EPROM using the default boot ROM chip select (CS0), configurable for 8-, 16-, or 32-bit width. JTAG-based debug download is available post-reset but is not a primary boot method. The MPC8540VT667LC does not support NAND flash or SD card boot natively.

Is the MPC8540VT667LC pin-compatible with other MPC854x variants like MPC8547 or MPC8548?

The MPC8540VT667LC shares the same 783-pin FC-PBGA package and core pinout with MPC8547 and MPC8548, enabling mechanical compatibility. However, electrical and functional differences exist: MPC8547 lacks RapidIO and OCeaN; MPC8548 adds SEC and SerDes. Signal mapping for unused pins differs, and power sequencing requirements vary slightly. While PCB layout reuse is possible, full pin-for-pin functionality is not guaranteed - the MPC8540VT667LC must be validated independently for each target application.

What is the thermal design power (TDP) of the MPC8540VT667LC at 667 MHz operation?

At 667 MHz core frequency, the MPC8540VT667LC has a typical VDD power dissipation of 5.9 W and maximum of 8.7 W, per Table 4 in the Hardware Specifications Rev. 4.1. Adding estimated I/O power (DDR: 0.73 W, PCI-X: 0.25 W, TSEC: 40 mW × 2, etc.) yields a total system power of approximately 7.5–10.5 W. This requires a heatsink with ≤ 12°C/W junction-to-ambient thermal resistance under 105°C max junction temperature conditions, as specified in Section 16.