NXP Semiconductors MC7448HX1000NC

Overview

MC7448HX1000NC from Freescale Semiconductor is a 1000 MHz PowerPC G4 RISC microprocessor with integrated 1-Mbyte unified L2 cache, double-precision FPU, and AltiVec SIMD engine. It implements the PowerPC instruction set v1.0 on 90 nm SOI CMOS, supports MPX/60x bus protocols, and targets high-performance networking and computing systems requiring deterministic real-time processing and hardware-accelerated media workloads.

For engineers reviewing the MC7448HX1000NC datasheet, MC7448HX1000NC pinout, MC7448HX1000NC application, or MC7448HX1000NC equivalent, key selection criteria include its 1000 MHz core frequency at 1.15 V, dynamic frequency switching (DFS) support, ECC-enabled L2 cache, thermal diode integration, and compatibility with 1.5 V / 1.8 V / 2.5 V I/O voltage modes.

Technical Context

The MC7448HX1000NC features a seven-stage superscalar pipeline with up to three instructions plus one branch dispatched per cycle, 16-entry completion queue, and out-of-order issue for AltiVec instructions. Its memory subsystem includes separate 32-Kbyte 8-way L1 instruction and data caches with MESI coherency, and an on-die 1-Mbyte 8-way unified L2 cache supporting ECC or parity on data and parity on tags.

It integrates dual MMUs (128-entry 2-way TLBs), JTAG/COP debug interface, hardware-enforced cache coherency, load/store reservation for atomic operations, and DFS enabling core frequency halving or quartering. Thermal management includes a calibrated on-die temperature diode and instruction cache throttling.

Key Specifications

Pinout & Package

MC7448HX1000NC uses a 360-ball ceramic BGA (HCTE package) with 1.27 mm pitch, designed for high-density, thermally demanding embedded computing applications. Ball grid layout follows JEDEC MO-205AC standard with defined power/ground distribution and signal integrity zones.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC7447AHX1000N and MPC7448HX1420NC, MC7448HX1000NC uniquely balances ECC-protected L2 cache, DFS power scaling, and 1000 MHz deterministic performance-making it optimal for thermally constrained, safety-aware networking systems where reliability outweighs peak clock speed.

Availability

MC7448HX1000NC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and avionics applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical designs.

Supply support for MC7448HX1000NC 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 for high-reliability, high-throughput embedded computing in carrier-grade networking equipment and real-time control systems, emphasizing thermal resilience, hardware-assisted virtualization, and deterministic interrupt latency.

FAQ

What is the core voltage requirement for stable operation of the MC7448HX1000NC?

The MC7448HX1000NC requires a nominal core supply voltage of 1.15 V ± 50 mV for stable operation at its rated 1000 MHz frequency. This specification is validated per Table 4 of the MPC7448EC Rev. 4 datasheet and must be maintained under all load conditions, including transient current spikes during AltiVec-intensive workloads. Deviations outside this range may cause timing violations or functional failure.

Does the MC7448HX1000NC support dynamic frequency switching (DFS)?

Yes, the MC7448HX1000NC supports dynamic frequency switching (DFS) in both divide-by-2 and divide-by-4 modes, allowing software-controlled reduction of core frequency to 500 MHz or 250 MHz. This feature is implemented in hardware and documented in Section 2.7 of the MPC7448EC Rev. 4 specification, enabling power savings in low-traffic operational states without firmware modification.

What L2 cache error protection does the MC7448HX1000NC provide?

The MC7448HX1000NC provides configurable error protection for its 1-Mbyte L2 cache: ECC (64-bit) or parity can be enabled on L2 data, and parity is always active on L2 tags. This capability is confirmed in Section 2.5 and Table 1 of the MPC7448EC Rev. 4 document and is essential for applications requiring high data integrity, such as telecom control plane processing.

Which I/O voltage modes are supported by the MC7448HX1000NC?

The MC7448HX1000NC supports three I/O voltage modes: 1.5 V, 1.8 V, and 2.5 V. The selected mode is determined by BVSEL[0:1] pin states sampled at HRESET negation, as specified in Table 3 of the MPC7448EC Rev. 4 datasheet. The 1.5 V mode maintains pin compatibility with earlier MPC7447A designs, while 2.5 V mode matches legacy 60x bus systems.

Is the MC7448HX1000NC pin-compatible with other MPC7448 speed grades?

Yes, the MC7448HX1000NC is pin-compatible with all other MPC7448 speed grades (e.g., MC7448HX1420NC, MC7448HX1600NC) sharing the same 360-ball HCTE ceramic BGA package. Mechanical and electrical pinouts-including power, ground, signal, and thermal pad assignments-are identical across speed variants, enabling drop-in replacement in validated PCB layouts.