NXP Semiconductors MPC860SRVR50D4R2

Overview

MPC860SRVR50D4R2 from Freescale Semiconductor is a PowerQUICC™ integrated communications controller combining a 32-bit Power Architecture™ CPU core, communications processor module (CPM), and system integration unit (SIU) in a single PBGA357 package. It delivers up to 50 MHz CPU operation, supports four serial communications controllers (SCCs), 10/100 Mbps Ethernet, ATM over UTOPIA, and features 4 KB instruction/4 KB data cache, real-time clock, and PCMCIA socket controller for embedded networking applications.

For engineers reviewing the MPC860SRVR50D4R2 datasheet, MPC860SRVR50D4R2 pinout, MPC860SRVR50D4R2 application, or MPC860SRVR50D4R2 equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and timing specifications, and application-specific design guidance for industrial gateways, DSLAMs, and telecom edge devices requiring deterministic real-time communication processing.

Technical Context

The MPC860SRVR50D4R2 implements a dual-core architecture: a 32-bit Power Architecture™ CPU with MMU, instruction/data caches, and branch prediction; and a RISC-based CPM handling protocol offload for HDLC, UART, I²C, SPI, and FEC. Its SIU integrates clock synthesis, watchdog, PIT, RTC, and IEEE 1149.1 JTAG debug support.

It supports dynamic bus sizing (8/16/32-bit), 32 address lines, up to 80 MHz CPU frequency (configured at 50 MHz for this variant), and memory controller with eight banks, programmable wait states, and glueless interface to DRAM, SRAM, Flash, and EPROM. The CPM includes 8 KB dual-port RAM, 16 SDMA channels, and four BRGs tied to SCC/SMC peripherals.

Key Specifications

Pinout & Package

Package: PBGA357 (ZQ/VR code), 25 mm × 25 mm body, 1.27 mm ball pitch, 0.9 mm mold compound thickness. Requires controlled-impedance PCB layout with dedicated power/ground planes and ≤0.5-inch capacitor lead length for each VDD/GND pair.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC860SRVR50D4R2, the MPC860T offers higher ATM bandwidth but removes PCMCIA support, while the MPC860DP increases cache size and memory management capability at the expense of integrated peripherals - making MPC860SRVR50D4R2 optimal for balanced telecom gateway designs requiring both protocol flexibility and local expansion.

Availability

MPC860SRVR50D4R2 is available at Aetrix Electronics and suitable for DSLAM line cards, industrial protocol gateways, telecom edge routers, and secure remote terminal units requiring stable component supply across extended product lifecycles.

Supply support for MPC860SRVR50D4R2 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 MPC860 PowerQUICC family was designed to integrate CPU, communications peripherals, and system control logic into a single chip for cost-sensitive, high-reliability telecom infrastructure - targeting DSLAMs, routers, and protocol converters where deterministic real-time performance is critical.

FAQ

What is the maximum operating frequency of the MPC860SRVR50D4R2?

The MPC860SRVR50D4R2 is factory-configured and specified for a maximum CPU frequency of 50 MHz. While the underlying MPC860 architecture supports up to 80 MHz, this specific variant (indicated by 'R50' in the part number) is binned and tested to operate reliably at 50 MHz under industrial temperature conditions (–40°C to +95°C junction). Exceeding this frequency may cause timing violations in the CPM or memory controller.

Does the MPC860SRVR50D4R2 include an integrated Ethernet MAC?

Yes, the MPC860SRVR50D4R2 includes a fully compliant IEEE 802.3u 10/100 Mbps Ethernet MAC with MII interface. It supports full-duplex operation, auto-negotiation, and hardware CRC generation/checking. The MII signals (MII_TXD[0:3], MII_TX_EN, MII_TX_ER, MII_RX_DV, MII_RX_ER, MII_RX_CLK, MII_COL, MII_CRS, MII_MDC, MII_MDIO) are routed to dedicated pins and require controlled-impedance PCB traces.

What package type and pin count does the MPC860SRVR50D4R2 use?

The MPC860SRVR50D4R2 uses a 357-ball plastic ball grid array (PBGA) package with ZQ/VR package code (case number 5058), measuring 25 mm × 25 mm with 1.27 mm ball pitch. This matches the mechanical dimensions and solder mask layout of other MPC860 variants in the ZQ/VR family, enabling drop-in replacement within the same package footprint.

Can the MPC860SRVR50D4R2 support ATM over UTOPIA interface?

Yes, the MPC860SRVR50D4R2 supports ATM over UTOPIA Level 1 interface, including cell-level handshake, multi-PHY support (up to four physical layer devices), and compatibility with 25/51/155 Mbps framers. Its ATM pace control (APC) scheduler enables hardware-assisted CBR and UBR traffic shaping, delivering verified cell processing throughput of 50–70 Mbps at 50 MHz system clock.

What is the function of the CPM in the MPC860SRVR50D4R2?

The Communications Processor Module (CPM) in the MPC860SRVR50D4R2 is a dedicated RISC co-processor that offloads protocol processing from the main CPU. It manages all four SCCs, two SMCs, SPI, I²C, FEC, and TSA functions - handling HDLC framing, CRC calculation, UART baud-rate generation, and ATM cell assembly/disassembly - thereby reducing CPU interrupt load by up to 60% in high-throughput networking applications.