NXP Semiconductors MC7448VS1400NC

Overview

MC7448VS1400NC from Freescale Semiconductor is a 1420 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 SOI CMOS, targeting high-performance networking and computing systems requiring deterministic real-time processing, multimedia acceleration, and hardware-enforced cache coherency.

For engineers reviewing the MC7448VS1400NC datasheet, MC7448VS1400NC pinout, MC7448VS1400NC application, or MC7448VS1400NC equivalent, key selection criteria include its 1420 MHz core frequency at 1.20 V, 32-Kbyte L1 I/D caches, dynamic frequency switching (DFS) support, thermal diode integration, and compatibility with MPX/60x bus protocols in embedded control and signal processing platforms.

Technical Context

The MC7448VS1400NC employs a seven-stage superscalar pipeline with out-of-order issue for AltiVec instructions and in-order execution for scalar units. Its memory subsystem includes dual MMUs with 128-entry 2-way TLBs, 52-bit virtual addressing, and hardware MESI coherency for multiprocessor environments.

It integrates eleven execution units: four integer units (three identical SFX + one misc), five-stage IEEE 754 FPU, four vector units (VIU1/VIU2/VFPU/VPU), and a branch processing unit with 128-entry BTIC and 2048-entry BHT-enabling up to three instructions plus a branch dispatched per cycle and 16 concurrent in-flight instructions.

Key Specifications

Pinout & Package

MC7448VS1400NC is housed in a surface-mount 360-pin ceramic ball grid array (HCTE) package with 27 mm × 27 mm footprint and 1.27 mm pitch. The package supports JEDEC-standard thermal resistance (RθJA = 26°C/W on 1s board) and provides dedicated power/ground ball arrays for low-noise core and I/O domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC7447A and MPC7450, MC7448VS1400NC uniquely balances proven G4 architecture maturity with production-ready thermal/power features-making it optimal for sustaining engineering of deployed networking and industrial systems where reliability, ECC, and DFS are mandatory but full requalification is prohibitive.

Availability

MC7448VS1400NC is available at Aetrix Electronics and suitable for wireless infrastructure, industrial automation, secure networking, and avionics applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for MC7448VS1400NC 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, connectivity, and analog solutions for automotive, industrial, and networking markets.

The MPC7448 product line was designed specifically for high-throughput, low-latency embedded computing in telecom infrastructure and real-time control systems-leveraging Power Architecture to deliver deterministic performance with hardware-enforced reliability features.

FAQ

What is the maximum operating temperature for MC7448VS1400NC?

The MC7448VS1400NC has a specified die-junction temperature range of 0°C to 105°C under recommended operating conditions. This limit applies during full-power operation at 1420 MHz and 1.20 V core voltage. Thermal design must ensure RθJA remains ≤26°C/W on single-layer boards or ≤16°C/W on four-layer boards with 200 ft/min airflow to stay within this envelope. The integrated thermal diode provides real-time monitoring to prevent exceeding the 105°C threshold.

Does MC7448VS1400NC support little-endian mode?

Yes, MC7448VS1400NC supports both big-endian and little-endian operation modes, including misaligned little-endian accesses. Endianness is controlled dynamically via the MSR[LE] bit in the Machine State Register and can be switched per-instruction stream using the bswap instruction. This capability enables binary compatibility with legacy PowerPC software while supporting modern toolchains targeting little-endian Linux distributions.

What bus protocols does MC7448VS1400NC implement?

MC7448VS1400NC implements the MPX bus protocol as its primary system interface and supports a defined subset of the 60x bus protocol for backward compatibility with existing PowerPC memory controllers and peripherals. It does not support PCI Express, RapidIO, or HyperTransport. The MPX interface provides 64-bit data width, 36-bit physical addressing, and cache-coherent snoop transactions required for symmetric multiprocessing configurations.

How is dynamic frequency switching (DFS) enabled on MC7448VS1400NC?

DFS on MC7448VS1400NC is enabled by writing to the HID0 register's DFSE bit (bit 29) and setting the appropriate DFS ratio bits (DFSS[1:0]) to select ÷2 or ÷4 division. The transition occurs synchronously with the next instruction boundary and preserves all architectural state-including cache lines, TLB entries, and register contents. No external clock source change is required; the internal PLL automatically adjusts its feedback divider to achieve the new core frequency while maintaining lock stability.

Is MC7448VS1400NC pin-compatible with earlier MPC7447 variants?

No, MC7448VS1400NC is not pin-compatible with MPC7447 or MPC7447A despite sharing the same 360-ball HCTE package footprint. Key differences include relocated BVSEL[0:1] pins for I/O voltage mode selection, modified power sequencing requirements for AVDD filtering, and additional thermal diode output (THERM) pin. PCB layout must follow the MC7448-specific pin assignment table (Section 6 of MPC7448EC Rev. 4) to ensure functional correctness.