NXP Semiconductors MPC8260ACVVMIBB

Overview

MPC8260ACVVMIBB from Freescale Semiconductor is a PowerQUICC™ II integrated communications processor featuring a dual-issue EC603e-derived G2 core (up to 300 MHz), a dedicated 32-bit communications processor module (CPM), and integrated memory controller supporting SDRAM, SRAM, and Flash. It delivers concurrent high-speed packet processing via three Fast Communications Controllers (FCCs), four Serial Communications Controllers (SCCs), two Serial Management Controllers (SMCs), SPI, I²C, and eight TDM interfaces - deployed in carrier-grade DSLAMs, enterprise routers, and telecom access gateways.

For engineers reviewing the MPC8260ACVVMIBB datasheet, MPC8260ACVVMIBB pinout, MPC8260ACVVMIBB application, or MPC8260ACVVMIBB equivalent, key selection criteria include its 480-pin TBGA package, 1.7–2.2 V core supply range, 3.135–3.465 V I/O supply, dual PLL architecture enabling independent G2 core and CPM clocking, and support for IEEE 1149.1 JTAG debug and PCI bridge functionality (in select variants).

Technical Context

The MPC8260ACVVMIBB implements a split-architecture design: the 60x-bus-connected G2 core handles general-purpose control and protocol stack execution, while the autonomous CPM offloads real-time serial communications tasks using microcode-driven RISC firmware. Its memory subsystem includes a 12-bank controller with glueless support for page-mode SDRAM and configurable parity/ECC protection on 64-bit data paths.

Hardware acceleration is distributed across multiple domains: FCCs support MII-based 10/100 Mbps Ethernet and UTOPIA-level ATM SAR at 155 Mbps; SCCs handle HDLC, UART, and BISYNC; TC-layer hardware (on MPC8264/MPC8266) enables IMA sub-rate ATM cell processing - though MPC8260ACVVMIBB lacks TC-layer and PCI bridge blocks per family documentation.

Key Specifications

Pinout & Package

Package: 480-pin Thin Ball Grid Array (TBGA), 27 mm × 27 mm, 1.27 mm ball pitch, JEDEC MO-205 standard. Thermal resistance θJA = 83 °C/W (4-layer board, 1 m/s airflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC8260ACVVMIBB, MPC8272CZQHBB extends ATM capabilities with hardware TC-layer and higher clock rates, while MPC8360EVRAGDB abandons CPM entirely for a modern e300-based architecture with cryptographic acceleration - making MPC8260ACVVMIBB optimal for maintaining legacy CPM-based firmware investments.

Availability

MPC8260ACVVMIBB is available at Aetrix Electronics and suitable for DSLAM line cards, enterprise router control planes, TDM voice gateways, and industrial protocol converters requiring stable component supply across extended product lifecycles.

Supply support for MPC8260ACVVMIBB 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) pioneered PowerQUICC processors for embedded networking, emphasizing hardware-accelerated communications offload and real-time determinism.

The MPC8260ACVVMIBB belongs to the PowerQUICC II family, designed specifically for carrier-class access equipment requiring concurrent high-speed serial protocol handling and deterministic packet forwarding without host CPU intervention.

FAQ

What is the maximum operating frequency of the MPC8260ACVVMIBB core?

The MPC8260ACVVMIBB supports a maximum G2 core frequency of 300 MHz, achievable with a 1.9–2.2 V core supply and appropriate thermal management. At this speed, it delivers approximately 1.90 Dhrystone MIPS/MHz performance. The actual operational frequency depends on voltage scaling and junction temperature - for example, 233 MHz operation requires ≥1.9 V VDD, while 200 MHz allows down to 1.7 V.

Does the MPC8260ACVVMIBB include an integrated PCI bridge?

No, the MPC8260ACVVMIBB does not include an integrated PCI bridge. According to Freescale's MPC8260AEC Rev. 2.0 documentation, the 60x-to-PCI bridge is exclusive to the MPC8265 and MPC8266 variants. The MPC8260ACVVMIBB retains the full 60x bus and local bus interfaces but lacks PCI host/peripheral logic, configuration registers, and DMA channels associated with the bridge function.

What package type and thermal characteristics apply to the MPC8260ACVVMIBB?

The MPC8260ACVVMIBB uses a 480-pin TBGA package (27 mm × 27 mm, 1.27 mm pitch). Its thermal resistance is θJA = 83 °C/W under 1 m/s airflow on a four-layer PCB - significantly lower than the 131 °C/W value for natural convection on a single-layer board. Junction temperature must remain ≤105 °C, requiring heatsinking when power dissipation exceeds 3 W at 70 °C ambient.

How does the CPM in the MPC8260ACVVMIBB differ from the main G2 core?

The CPM in the MPC8260ACVVMIBB is a fully autonomous 32-bit RISC microcontroller with 32-Kbyte dual-port RAM, dedicated instruction ROM, and serial peripherals (FCCs, SCCs, SMCs). Unlike the G2 core, it executes microcode rather than PowerPC instructions, handles time-critical serial protocols independently, and shares no cache or TLB resources - enabling true hardware offload of Ethernet, HDLC, and TDM processing without G2 core intervention.

Which communication interfaces are supported by the MPC8260ACVVMIBB's serial controllers?

The MPC8260ACVVMIBB supports MII-based 10/100 Mbps Ethernet via three FCCs; HDLC, UART, BISYNC, and transparent modes via four SCCs; BRI/GCI management via two SMCs; plus SPI, I²C, and up to eight TDM interfaces. All serial controllers operate from independent baud rate generators and support both internal and external clocking modes with programmable timing offsets per Freescale's AC timing specs (e.g., sp36a/sp37a for FCC outputs).