NXP Semiconductors MC7448HX1400NC

Overview

MC7448HX1400NC from Freescale Semiconductor is a 1420 MHz PowerPC G4 RISC microprocessor built on 90 nm CMOS SOI technology, featuring a 32-Kbyte L1 instruction cache, 32-Kbyte L1 data cache, and 1-Mbyte unified L2 cache with ECC support. It implements the PowerPC instruction set architecture v1.0 and integrates an AltiVec SIMD unit, dual-precision FPU, and hardware-enforced MESI coherency - deployed in high-performance networking and computing systems requiring deterministic real-time throughput.

For engineers reviewing the MC7448HX1400NC datasheet, MC7448HX1400NC pinout, MC7448HX1400NC application, or MC7448HX1400NC equivalent, key selection criteria include its 1420 MHz core frequency at 1.20 V VDD, dynamic frequency switching (DFS) support for power scaling, 360-ball ceramic BGA (HCTE) package, and compatibility with MPX/60x bus protocols in embedded telecom infrastructure and industrial control platforms.

Technical Context

The MC7448HX1400NC implements a seven-stage superscalar pipeline with up to three instructions plus one branch dispatched per cycle, supported by 12-entry instruction queue and 16-entry completion queue. Its execution resources include four integer units, five-stage IEEE 754-compliant FPU, four vector units (VIU1, VIU2, VFPU, VPU), and separate instruction/data MMUs with 128-entry two-way TLBs.

Memory subsystem features include physically indexed L1 caches with PLRU replacement, 256-bit L1/L2 bus interface, L2 cache configurable for write-back/write-through with parity on tags and ECC on data, and hardware-accelerated cache coherency supporting multiprocessor configurations via load/store-with-reservation instructions.

Key Specifications

Pinout & Package

The MC7448HX1400NC is housed in a surface-mount 360-ball ceramic ball grid array (HCTE) package with 1.27 mm pitch, designed for high-reliability industrial and telecom applications requiring thermal stability and long-term solder joint integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC7447AHX1333NC and MPC7448HX1600NC, the MC7448HX1400NC uniquely balances ECC-protected L2 capacity, DFS-enabled power adaptability, and 1420 MHz throughput - making it optimal for telecom edge nodes where uptime, thermal headroom, and deterministic latency converge.

Availability

MC7448HX1400NC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and secure gateway applications requiring stable component supply across extended product lifecycles.

Supply support for MC7448HX1400NC 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 engineered for high-reliability, high-throughput computing in carrier-class networking equipment and real-time control systems - emphasizing thermal robustness, ECC resilience, and Power Architecture™ binary compatibility.

FAQ

What is the maximum operating junction temperature for the MC7448HX1400NC?

The MC7448HX1400NC has a maximum die-junction temperature (Tj) of 105°C under recommended operating conditions. This limit is defined in Table 4 of the MPC7448EC Rev. 4 datasheet and applies across all speed grades. Thermal design must ensure RθJA and board-level airflow maintain Tj ≤ 105°C during Full-Power Mode–Thermal operation, especially when DFS is disabled. The integrated thermal diode provides real-time monitoring to prevent exceeding this threshold.

Does the MC7448HX1400NC support pin-compatible migration from the MPC7447A series?

The MC7448HX1400NC uses the same 360-ball HCTE package and identical pinout as the MPC7447A, enabling direct PCB reuse. However, BVSEL[0:1] configuration for 1.8 V I/O mode differs - the MC7448HX1400NC requires 00, whereas MPC7447A used 11. For 2.5 V mode (BVSEL=01 or 11), pin compatibility is fully preserved. No changes to power delivery or clock circuitry are needed beyond adjusting VDD to 1.20 V.

What bus protocols does the MC7448HX1400NC natively support?

The MC7448HX1400NC supports the MPX bus protocol as its primary system interface and a defined subset of the 60x bus protocol for backward compatibility with legacy PowerPC memory controllers and peripherals. It does not support PCI Express, RapidIO, or HyperTransport. System designers must implement MPX-compliant arbitration, snoop filtering, and cache coherency logic - documented in Section 9 of the MPC7448EC specification.

How is L2 cache ECC configured and enabled on the MC7448HX1400NC?

L2 cache ECC on the MC7448HX1400NC is enabled via the L2CFG register's ECCEN bit (bit 31) and requires initialization during boot firmware execution. Once enabled, 64-bit ECC protects all L2 data transfers; single-bit errors are corrected transparently, and double-bit errors trigger machine check exceptions. ECC status is monitored through L2ERRSTAT register flags. The feature is hardware-mandatory - no software bypass or disable mechanism exists after power-on reset.

Can the MC7448HX1400NC operate in little-endian mode for peripheral interfacing?

Yes, the MC7448HX1400NC supports both big-endian and little-endian modes at runtime via the MSR[LE] bit, with full architectural compliance including misaligned little-endian accesses. This enables seamless interfacing with little-endian peripherals such as PCIe root complexes or ARM-based companion processors without byte-swapping overhead. Endianness is controlled per-instruction stream and can be toggled dynamically during context switches.