NXP Semiconductors MC7447AVU1000LB

Overview

MC7447AVU1000LB from Freescale Semiconductor is a 32-bit PowerPC G4 RISC microprocessor with 512-Kbyte unified L2 cache, 32-Kbyte L1 instruction and data caches, and AltiVec™ SIMD engine. It operates at 1000 MHz core frequency with 1.3 V ±50 mV core supply and supports MPX/60x bus protocols for high-performance networking and embedded computing systems.

For engineers reviewing the MC7447AVU1000LB datasheet, MC7447AVU1000LB pinout, MC7447AVU1000LB application, or MC7447AVU1000LB equivalent, key selection considerations include dynamic frequency switching (DFS), integrated temperature diode, 360-ball ceramic BGA package, IEEE 754-compliant FPU, and hardware-enforced MESI cache coherency for multiprocessor designs.

Technical Context

The MC7447AVU1000LB implements a seven-stage superscalar pipeline with up to 16 in-flight instructions, three independent issue queues (FIQ, VIQ, GIQ), and eleven execution units including four integer units, five-stage FPU, and four vector units. Its memory subsystem features dual MMUs with 128-entry two-way TLBs, 52-bit virtual addressing, and hardware/software-reloadable page tables.

It integrates dynamic frequency switching (DFS) for software-controlled halving of core clock, three low-power states (Nap, Sleep, Deep Sleep), JTAG/COP debug interface, performance monitor unit, and on-die thermal diode. The processor supports both big- and little-endian operation and includes parity protection on L1/L2 caches and system bus.

Key Specifications

Pinout & Package

MC7447AVU1000LB 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. Thermal resistance is RθJC < 0.1°C/W and RθJA = 26°C/W (natural convection, 1s board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC7447AEC1267B and MPC7445EC1000B, MC7447AVU1000LB uniquely balances 1000 MHz deterministic performance, 512-Kbyte L2 capacity, and DFS-enabled thermal adaptability-making it optimal for space-constrained telecom modules requiring stable long-term operation at 1000 MHz without derating.

Availability

MC7447AVU1000LB is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and avionics systems requiring stable component supply, long-lifecycle support, and RoHS-compliant ceramic packaging.

Supply support for MC7447AVU1000LB 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 embedded processors, analog, and connectivity solutions for automotive, industrial, and networking markets.

The MPC7447A product line targets high-reliability computing applications demanding deterministic real-time performance, hardware cache coherency, and integrated thermal/power management-specifically for telecom control planes and ruggedized industrial controllers.

FAQ

What is the maximum operating junction temperature for MC7447AVU1000LB?

The MC7447AVU1000LB has a maximum rated die-junction temperature of 105°C under recommended operating conditions. This limit applies during full-power operation at 1000 MHz and 1.3 V core supply. Operation beyond this temperature risks timing violations and accelerated electromigration; thermal design must ensure RθJA ≤ 26°C/W with natural convection on a single-layer board per Freescale's characterization data for MC7447AVU1000LB.

Does MC7447AVU1000LB support both 1.8 V and 2.5 V I/O interfaces?

Yes, MC7447AVU1000LB supports dual I/O voltage modes via the BVSEL pin. When BVSEL is driven low at HRESET negation, the processor configures for 1.8 V ±5% OVDD operation; when BVSEL is tied to HRESET or high, it configures for 2.5 V ±5% OVDD. Input thresholds and output drive strength automatically adapt, but OVDD must match the selected mode-mixing voltages violates MC7447AVU1000LB's absolute maximum ratings.

How does Dynamic Frequency Switching (DFS) function in MC7447AVU1000LB?

In MC7447AVU1000LB, DFS is a software-controlled feature that halves the core clock from 1000 MHz to 500 MHz without resetting the processor. It is activated by writing to the HID0 register's DFS bit, triggering immediate PLL reconfiguration. The transition preserves register state and cache contents, enabling seamless thermal throttling. DFS is not available on MPC7445 variants, making it a key differentiator of MC7447AVU1000LB for thermally constrained deployments.

What package type and ball count does MC7447AVU1000LB use?

MC7447AVU1000LB uses a 360-ball ceramic ball grid array (HCTE) package with 1.27 mm pitch and RoHS-compliant finish. This package provides superior thermal conductivity (RθJC < 0.1°C/W) and mechanical stability for vibration-prone environments. Pin compatibility is maintained across the MPC7447A family-including MC7447AVU1000LB, MPC7447AEC1267B, and MPC7445EC1000B-enabling drop-in upgrades within the same footprint.

Is MC7447AVU1000LB compatible with the MPC7447 reference design?

Yes, MC7447AVU1000LB is a footprint-compatible, drop-in replacement for MPC7447 in existing designs, provided the core power supply is 1.3 V. Freescale explicitly states this compatibility in the hardware specifications document. Key enhancements-DFS and the temperature diode-require no PCB changes but enable new thermal management capabilities in MC7447AVU1000LB that were absent in the base MPC7447.