NXP Semiconductors MPC8260ACZUMIBB

Overview

MPC8260ACZUMIBB from NXP Semiconductors (formerly Freescale) is a PowerQUICC™ II integrated communications processor featuring a dual-issue EC603e-based G2 core operating up to 300 MHz, a dedicated 32-bit communications processor module (CPM), and support for 10/100-Mbps Ethernet via three FCCs, ATM over UTOPIA, HDLC, TDM, and PCI bridge functionality. It targets carrier-grade edge routers, VoIP gateways, and telecom access equipment requiring deterministic real-time protocol handling.

For engineers reviewing the MPC8260ACZUMIBB datasheet, MPC8260ACZUMIBB pinout, MPC8260ACZUMIBB application, or MPC8260ACZUMIBB equivalent, key selection considerations include its 480-pin TBGA package, dual PLL architecture enabling independent core/CPM clocking, 32-Kbyte dual-port RAM for CPM–core data exchange, IEEE 1149.1 JTAG debug interface, and support for SDRAM, Flash, and SRAM via a 12-bank memory controller.

Technical Context

The MPC8260ACZUMIBB implements a split-architecture design: the 32-bit PowerPC G2 core handles general-purpose control and packet classification, while the autonomous CPM offloads time-critical serial communications tasks-including MII, UTOPIA, SCC, SMC, SPI, and I²C-via microcode-executed firmware. Its 60x bus operates at up to 266 MHz with 64-bit data width and supports burst transfers, ECC/parity, and multi-master arbitration.

Thermal management relies on a 4-layer PCB layout with dedicated VDD/VDDH/VCCSYN power planes, four 0.1 µF bypass capacitors per side, and θJA = 83 °C/W (1 m/s airflow, 4-layer board). Power dissipation ranges from 1.2 W (133 MHz CPM / 200 MHz CPU) to 3.1 W (200 MHz CPM / 300 MHz CPU) at 1.9–2.2 V core supply, with junction temperature limited to 105 °C.

Key Specifications

Pinout & Package

The MPC8260ACZUMIBB is housed in a 480-ball thin quad flat no-lead (TBGA) package with 27 mm × 27 mm body size and 1.0 mm ball pitch. Thermal resistance is θJA = 83 °C/W (1 m/s airflow, 4-layer board) and θJB = 4 °C/W, requiring thermal vias under the exposed die pad for production deployment.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated communications processor applications.

Compared with MPC8260ACZUMIBB, MPC8272CZUMIBB delivers 33% higher core performance and built-in crypto, while MPC8360EVRAGDB abandons CPM for scalable software-defined networking - making MPC8260ACZUMIBB optimal for cost-sensitive, hardware-accelerated telecom edge nodes where TDM/ATM interoperability is mandatory.

Availability

MPC8260ACZUMIBB is available at Aetrix Electronics and suitable for carrier-grade edge routers, VoIP media gateways, and DSLAM line cards requiring stable component supply across extended product lifecycles.

Supply support for MPC8260ACZUMIBB 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communications markets, with roots in Freescale's PowerQUICC lineage.

The MPC8260ACZUMIBB belongs to the PowerQUICC™ II family, designed specifically for deterministic, low-latency communications processing in telecom infrastructure - combining a PowerPC core with a dedicated RISC communications coprocessor to eliminate host-CPU bottlenecks in protocol handling.

FAQ

What is the maximum supported CPU frequency for the MPC8260ACZUMIBB?

The MPC8260ACZUMIBB supports a maximum G2 core frequency of 300 MHz, achievable with a 1.9–2.2 V core supply voltage and proper thermal management. At this speed, it delivers approximately 1.90 Dhrystone MIPS/MHz and meets all AC timing specifications under 105 °C junction temperature limits. The MPC8260ACZUMIBB datasheet specifies that frequencies ≥233 MHz require VDD ≥1.9 V to ensure stable operation.

Does the MPC8260ACZUMIBB include an integrated PCI bridge?

No, the MPC8260ACZUMIBB does not include an integrated PCI bridge. That feature is exclusive to the MPC8265 and MPC8266 variants within the same PowerQUICC II family. The MPC8260ACZUMIBB provides a 64-bit 60x bus and 32-bit local bus for memory and peripheral interfacing but lacks PCI host/peripheral capability - requiring external PCI interface ICs if PCI connectivity is needed.

How is the communications processor module (CPM) clocked relative to the G2 core on the MPC8260ACZUMIBB?

The MPC8260ACZUMIBB uses two independent PLLs: one for the G2 core and another for the CPM. This allows asynchronous operation - for example, the CPM can run at 200 MHz to sustain full-rate Ethernet and ATM traffic while the G2 core operates at 150 MHz for control-plane tasks. The CPM clock multiplier supports ratios of 2:1 to 6:1 relative to the bus clock, enabling precise frequency tuning without affecting core timing.

What package type and thermal characteristics apply to the MPC8260ACZUMIBB?

The MPC8260ACZUMIBB uses a 480-ball TBGA package (27 mm × 27 mm, 1.0 mm pitch) with θJA = 83 °C/W under 1 m/s airflow on a 4-layer PCB. Its θJB = 4 °C/W indicates efficient heat transfer to the PCB, necessitating thermal vias beneath the exposed die pad. Junction temperature must remain ≤105 °C, requiring heatsinking for sustained 300 MHz operation in ambient temperatures above 55 °C.

Which serial interfaces are hardware-accelerated by the CPM in the MPC8260ACZUMIBB?

The CPM in the MPC8260ACZUMIBB hardware-accelerates three Fast Communications Controllers (FCCs) for 10/100-Mbps Ethernet (MII), ATM (UTOPIA), and HDLC; four Serial Communications Controllers (SCCs) for UART, HDLC, BISYNC, and transparent modes; two Serial Management Controllers (SMCs) for GCI/TDM management; plus SPI, I²C, and eight TDM ports - all executing protocol framing, CRC, and bit-level processing autonomously without G2 core intervention.