NXP Semiconductors KMC7448VU1400ND

Overview

KMC7448VU1400ND from Freescale Semiconductor is a 1420 MHz PowerPC G4 RISC microprocessor with integrated 1-Mbyte unified L2 cache, 32-Kbyte L1 instruction and data caches, and AltiVec SIMD engine. It implements the PowerPC v1.0 ISA on 90 nm SOI CMOS, targeting high-performance networking and computing systems requiring deterministic real-time processing, floating-point computation, and multimedia acceleration.

For engineers reviewing the KMC7448VU1400ND datasheet, KMC7448VU1400ND pinout, KMC7448VU1400ND application, or KMC7448VU1400ND equivalent, this page delivers verified electrical specs, thermal resistance values, DFS power management modes, bus voltage configuration (1.5 V/1.8 V/2.5 V), and L2 ECC support - all critical for embedded system integration, thermal design, and long-lifecycle board qualification.

Technical Context

The KMC7448VU1400ND features a seven-stage superscalar pipeline with out-of-order issue for AltiVec instructions, dual integer units (IU1a/b/c and IU2), five-stage IEEE 754-compliant FPU, and four vector units (VIU1, VIU2, VFPU, VPU). Its memory subsystem supports MPX and subset 60x bus protocols, with hardware-enforced MESI coherency for multiprocessor systems.

It integrates separate instruction and data MMUs with 128-entry 2-way TLBs, 8 IBATs/DBATs, and 52-bit virtual addressing. Thermal control includes a calibrated on-die temperature diode and three low-power states (Nap, Sleep, Deep Sleep), plus dynamic frequency switching (DFS) to halve or quarter core frequency under software control.

Key Specifications

Pinout & Package

Package: 360-ball ceramic BGA (HCTE), 27 mm × 27 mm, 1.27 mm pitch. Pinout validated per Freescale MPC7448EC Rev. 4, Sections 6–7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC7447AVU1400B, KMC7448VU1400ND adds L2 ECC and DFS for mission-critical reliability; compared with MPC7457VU1400B, it offers proven lifecycle stability and lower thermal envelope at the cost of cache capacity and FPU enhancements.

Availability

KMC7448VU1400ND is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and medical imaging systems requiring stable component supply, long-term obsolescence management, and traceable sourcing from authorized channels.

Supply support for KMC7448VU1400ND 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, thermally constrained networking and computing systems where deterministic real-time performance, floating-point capability, and long-lifecycle support are mandatory.

FAQ

What is the core supply voltage requirement for KMC7448VU1400ND?

KMC7448VU1400ND requires a nominal core supply voltage of 1.20 V ±50 mV at its rated 1420 MHz frequency. This value is specified in Table 4 of the MPC7448EC Rev. 4 datasheet and must be maintained within tolerance during full-power operation. Deviation beyond ±50 mV risks timing violations or functional failure. The KMC7448VU1400ND does not support voltage derating - unlike earlier MPC7447 variants, its VDD is fixed per speed grade.

Does KMC7448VU1400ND support pin-compatible migration from MPC7447A?

KMC7448VU1400ND shares the same 360-ball HCTE BGA package and pinout as MPC7447A, enabling mechanical compatibility. However, the BVSEL[0:1] pin configuration for 1.8 V I/O mode is incompatible - KMC7448VU1400ND uses 00 while MPC7447A uses 10. Therefore, board-level redesign is required for 1.8 V systems. For 2.5 V mode (BVSEL=01/11), pin compatibility is fully preserved.

What thermal management features are implemented in KMC7448VU1400ND?

KMC7448VU1400ND integrates three hardware thermal management features: a calibrated on-die temperature diode for real-time junction monitoring, Dynamic Frequency Switching (DFS) to reduce core clock by 2× or 4× under thermal stress, and three low-power states (Nap, Sleep, Deep Sleep) that progressively disable clocks and power domains. These features allow system designers to meet JEDEC JESD51-2 thermal limits without external sensors or complex firmware.

Is L2 cache ECC mandatory or configurable on KMC7448VU1400ND?

L2 cache ECC on KMC7448VU1400ND is configurable via system software - it can be enabled or disabled per memory page or block using the L2 cache control registers. When enabled, it provides single-bit error correction and double-bit error detection on 1-Mbyte unified L2 data. ECC is not applied to L2 tag parity, which remains byte-wide. This configurability allows trade-offs between reliability and performance in non-critical applications.

What bus protocols does KMC7448VU1400ND support for main memory interfacing?

KMC7448VU1400ND supports the MPX bus protocol as its primary system interface and a subset of the 60x bus protocol for backward compatibility with legacy PowerPC peripherals. It does not support PCI Express, DDR SDRAM native controllers, or AMBA AXI. Memory mapping requires external northbridge or custom logic to translate MPX transactions to DRAM or SRAM interfaces, as the KMC7448VU1400ND lacks integrated memory controller.