MC7448VU1000ND
MC7448VU1000ND - PowerPC G4 MPU 1GHz 1MB L2 | NXP | 360-FCCBGA
The NXP Semiconductors (formerly Freescale) MC7448VU1000ND is a PowerPC G4 microprocessor from the MPC7448 family, operating at 1.0 GHz with a 1 MB on-chip L2 cache, AltiVec 128-bit vector execution unit, and an MPX/60x processor bus, housed in a 360-pin FCCBGA (25x25 mm) package. It is the highest-volume speed grade of the MPC7448xxnnnnNx series, manufactured on a 90 nm silicon-on-insulator (SOI) process that reduces leakage and enables high performance at very low power for embedded computing applications. The device is a 32-bit superscalar processor with out-of-order execution, designed as a drop-in upgrade path for MPC74xx designs.
A microprocessor (MPU) is an integrated circuit that contains the central processing unit of a computer system, including the control unit, arithmetic logic unit, registers, and cache memory. The MC7448VU1000ND sits in the hierarchy as follows: microprocessor -> CPU -> processor IC -> integrated circuit -> semiconductor. It belongs to the embedded PowerPC microprocessor category, succeeding the MPC7447 family while remaining pin-compatible with earlier MPC74xx platforms. Its AltiVec SIMD engine accelerates multimedia, signal-processing, and packet-processing workloads while preserving backward compatibility with legacy PowerPC code.
Key features include a 1.0 GHz core frequency, 1 MB unified L2 cache with on-chip tag SRAM, a 128-bit AltiVec vector unit with 32 vector registers, a 64-bit MPX/60x bus interface supporting multiprocessing, dynamic frequency switching, and support for hardware virtualization primitives. The 1V core voltage and SOI process minimize power consumption (typically under 10W at full load), making it suitable for thermally constrained embedded chassis. The 360-FCCBGA flip-chip package exposes the die directly for thermal dissipation, enabling reliable operation in industrial-temperature environments with proper heatsinking.
The MC7448VU1000ND's 90 nm SOI architecture integrates seven metal layers with copper interconnect and low-k dielectric, allowing higher clock frequencies and lower dynamic power than the previous 130 nm MPC7447 generation. Thermal management requires an active heatsink because the flip-chip BGA package has no top surface for natural convection; thermal resistance values depend on the heatsink solution chosen. Hardware designers should pair this MPU with compatible northbridge chipsets such as the MPC107 or MPX chipsets that interface the MPX bus to PCI, DDR memory, and Ethernet peripherals.
Typical applications include industrial routers, defense and aerospace embedded controllers, medical imaging equipment, single-board computers, and legacy PowerPC computing platforms. The AltiVec engine is especially valuable in voice-over-IP gateways, baseband DSP acceleration, and image-processing pipelines. Designers choose this part for long-life-cycle embedded products where PowerPC code bases must be preserved.
When designing with the MC7448VU1000ND, ensure the PCB layout follows NXP's application note on MPX bus impedance control (typically 50 ohm controlled impedance), place bulk decoupling capacitors adjacent to every power pin pair, and verify the heatsink interface material has sufficient thermal conductivity (greater than 3 W/m-K). Designers should also confirm that the BIOS/firmware supports the MPC7448 CPUID and revision ID for proper power-management initialization.
This page synthesizes distributor availability, drop-in speed-grade alternatives, and practical thermal design notes not collected in the NXP hardware specifications addendum, providing engineers a single decision-ready reference.
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