NXP Semiconductors MC7448VU1000LD

Overview

MC7448VU1000LD from Freescale Semiconductor is a 1000 MHz PowerPC G4 RISC microprocessor with integrated 1-Mbyte unified L2 cache, IEEE 754-compliant double-precision FPU, and AltiVec SIMD engine. It implements the PowerPC instruction set v1.0 on 90 nm CMOS SOI technology and targets high-performance networking and computing systems requiring deterministic real-time processing, media acceleration, and cache-coherent multiprocessing.

For engineers reviewing the MC7448VU1000LD datasheet, MC7448VU1000LD pinout, MC7448VU1000LD application, or MC7448VU1000LD equivalent, key selection criteria include its 1000 MHz core frequency at 1.15 V, support for dynamic frequency switching (DFS) divide-by-two/four modes, 360-ball ceramic BGA package, and hardware-enforced MESI cache coherency for multi-CPU designs.

Technical Context

The MC7448VU1000LD employs a seven-stage superscalar pipeline with out-of-order issue for AltiVec instructions and in-order execution for scalar units. Its architecture includes three independent issue queues (FIQ, VIQ, GIQ), 16-entry completion queue, and dual MMUs with 128-entry two-way set-associative TLBs supporting 52-bit virtual addressing.

Memory subsystem features include separate 32-Kbyte eight-way set-associative L1 instruction and data caches with PLRU replacement, physically indexed tags, and hardware MESI coherency; plus an on-die 1-Mbyte eight-way unified L2 cache with ECC-capable data storage and parity-protected tags.

Key Specifications

Pinout & Package

MC7448VU1000LD is housed in a surface-mount 360-ball ceramic ball grid array (HCTE) package with 1.27 mm pitch, designed for high-thermal-conductivity mounting and signal integrity in dense server/router PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC7448VU1000LD, MPC7447AVU1000LD trades L2 ECC and DFS for lower cost and power, while MPC7448VU1420LD offers higher frequency headroom within identical thermal and pinout constraints-enabling scalable performance across product tiers without redesign.

Availability

MC7448VU1000LD is available at Aetrix Electronics and suitable for network infrastructure, industrial control, and legacy system modernization requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MC7448VU1000LD 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) was a leading designer of Power Architecture™ microprocessors for high-performance embedded computing and networking.

The MPC7448 product line was developed to deliver G4-class compute density and AltiVec acceleration for carrier-grade routers, media gateways, and real-time industrial controllers.

FAQ

What is the core voltage requirement for MC7448VU1000LD?

The MC7448VU1000LD requires a nominal core supply voltage of 1.15 V ±50 mV at 1000 MHz operation. This value is specified in Table 4 of the MPC7448EC Rev. 4 datasheet and must be maintained within tolerance during all active modes including DFS transitions. Deviation beyond ±50 mV risks timing violations or functional failure. The MC7448VU1000LD does not support voltage derating as earlier revisions did.

Does MC7448VU1000LD support JTAG debugging?

Yes, MC7448VU1000LD includes full IEEE Std. 1149.1 JTAG boundary-scan capability via dedicated TCK, TMS, TDI, TDO, and TRST pins. This enables in-circuit debugging, flash programming, and structural test without requiring additional debug interfaces. The JTAG logic remains active in Nap mode, allowing debug access even when instruction fetching is halted.

How does the L2 cache ECC work on MC7448VU1000LD?

The MC7448VU1000LD implements 64-bit ECC protection on its 1-Mbyte L2 data array, providing single-bit error correction and double-bit error detection. ECC is enabled by default and cannot be disabled in hardware. Parity protection is applied separately to L2 cache tags. Error injection capability allows validation of system-level error recovery routines during development.

Is MC7448VU1000LD pin-compatible with MPC7447A?

Yes, MC7448VU1000LD is mechanically and electrically pin-compatible with MPC7447A in the same 360-ball BGA package. However, BVSEL pin behavior differs for 1.8 V mode: MC7448VU1000LD uses a different encoding than MPC7447A, requiring board-level configuration adjustment if migrating from older devices.

What thermal resistance values apply to MC7448VU1000LD?

For MC7448VU1000LD in its 360-ball ceramic BGA package, junction-to-ambient thermal resistance is 26°C/W (natural convection, single-layer board) and 16°C/W (200 ft/min airflow, four-layer board). Junction-to-board resistance is 11°C/W. These values are measured per JEDEC standards and define minimum heatsink requirements to maintain ≤105°C junction temperature under full-power operation.