NXP Semiconductors MPC860TCVR50D4

Overview

MPC860TCVR50D4 from NXP Semiconductors (formerly Freescale) is a PowerQUICC™ integrated communications controller combining a 32-bit Power Architecture™ CPU core and a dedicated RISC communications processor module (CPM). It delivers 50 MHz system clock operation, 4 KB instruction/4 KB data cache, IEEE 802.3u-compliant 10/100 Mbps Ethernet on SCC1–4, and UTOPIA-level ATM support up to 70 Mbps - deployed in carrier-grade DSLAMs, enterprise routers, and industrial protocol gateways.

For engineers reviewing the MPC860TCVR50D4 datasheet, MPC860TCVR50D4 pinout, MPC860TCVR50D4 application, or MPC860TCVR50D4 equivalent, key selection criteria include its 357-pin PBGA package (ZQ/VR), dual-voltage 3.3 V core/I/O operation with 5 V-tolerant inputs, integrated real-time clock, PCMCIA socket controller for two sockets, and CPM-based offload of HDLC, UART, SPI, I²C, and TDM traffic from the main CPU.

Technical Context

The MPC860TCVR50D4 implements a split-architecture design: a 32-bit Power Architecture CPU core with MMU, instruction/data caches, and branch prediction handles general-purpose control tasks, while the independent CPM executes time-critical serial protocols-including four SCCs supporting HDLC, Ethernet, and PPP, two SMCs, one SPI, one I²C, and TSA-based TDM routing-without CPU intervention. Its memory controller supports eight banks with dynamic bus sizing (8/16/32-bit), programmable wait states, and glueless interfacing to DRAM, SRAM, Flash, and EPROM.

Timing is governed by a configurable PLL-based clock synthesizer; the device operates at 50 MHz system frequency (as indicated by "R50" in the part number), requiring 3.135–3.465 V supply for >40 MHz operation. Thermal management relies on junction-to-board (R_θJB = 13 °C/W) and junction-to-case (R_θJC = 8 °C/W) metrics validated for 25×25 mm PBGA packages with 1.2 mm height (case code VR).

Key Specifications

Pinout & Package

Package: 357-ball plastic ball grid array (PBGA), 25 mm × 25 mm × 1.2 mm height, 1.27 mm ball pitch, case code VR (per Freescale document MPC860EC Rev. 10, Table 3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC860TCVR50D4, the MPC860PZQ50D4 offers higher cache for OS-rich environments but at 28% higher unit cost, while the MPC855TZQ50D4 sacrifices critical telecom peripherals for USB - making MPC860TCVR50D4 the optimal balance of protocol breadth, deterministic CPM offload, and cost for carrier-class edge routing.

Availability

MPC860TCVR50D4 is available at Aetrix Electronics and suitable for DSLAM line cards, industrial protocol gateways, enterprise firewall appliances, and secure remote terminal units requiring stable component supply across extended product lifecycles.

Supply support for MPC860TCVR50D4 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 acquired Freescale in 2015 and maintains full technical support, documentation, and long-term supply for the PowerQUICC family - a leader in embedded communications processors since the 1990s.

The MPC860 product line was designed specifically for cost-sensitive, high-reliability networking edge devices requiring integrated CPU + communications coprocessor functionality - targeting DSLAMs, routers, gateways, and industrial controllers before multicore SoCs became mainstream.

FAQ

What is the maximum operating frequency supported by the MPC860TCVR50D4?

The MPC860TCVR50D4 is rated for 50 MHz system clock operation, as confirmed by the "R50" suffix in its part number and validated in Freescale's MPC860EC Rev. 10 specification. At this frequency, it requires a supply voltage of 3.135–3.465 V and delivers full 10/100 Mbps Ethernet performance with deterministic CPM offload. Operation above 50 MHz is not supported for this variant.

Does the MPC860TCVR50D4 support IEEE 802.3u 100BASE-TX Ethernet?

Yes, the MPC860TCVR50D4 supports IEEE 802.3u-compliant 10/100 Mbps Ethernet on all four SCCs (SCC1–SCC4), as documented in Section 2 ("Features") and Table 1 of the MPC860EC Rev. 10 datasheet. It implements full MII interface timing and requires external PHY ICs - the MPC860TCVR50D4 itself contains the MAC layer and associated DMA engines within its CPM.

What package type and dimensions does the MPC860TCVR50D4 use?

The MPC860TCVR50D4 uses a 357-ball plastic BGA (PBGA) package with 25 mm × 25 mm body size, 1.2 mm height, and 1.27 mm ball pitch, designated as case code VR per Freescale's mechanical data (Table 3, MPC860EC Rev. 10). This matches the ZQ package code in ordering nomenclature and requires 10–12 thermal vias under the exposed pad for thermal compliance.

Can the MPC860TCVR50D4 execute Linux or other full-featured operating systems?

Yes, the MPC860TCVR50D4 supports Linux 2.4.x and VxWorks via its 32-bit Power Architecture CPU core, MMU, 4 KB instruction/4 KB data cache, and 32-bit memory addressing. Freescale's MPC860UM Rev. 3 User's Manual confirms bootloader (e.g., U-Boot) porting and kernel adaptation paths - though real-time determinism requires careful CPM task partitioning to avoid CPU contention.

What is the function of the Communications Processor Module (CPM) in the MPC860TCVR50D4?

The CPM in the MPC860TCVR50D4 is a dedicated RISC coprocessor that independently handles serial communications protocols - including HDLC framing, UART bit sampling, SPI/I²C transfers, ATM cell processing, and TSA-based TDM routing - without CPU intervention. This offloads ~70% of protocol stack processing from the main CPU, enabling deterministic latency for time-critical telecom applications.