NXP Semiconductors MPC860TZQ50D4R2

Overview

MPC860TZQ50D4R2 from NXP (formerly Freescale) is a PowerQUICC™ integrated communications controller combining a 32-bit Power Architecture™ CPU core and a RISC-based 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 MPC860TZQ50D4R2 datasheet, MPC860TZQ50D4R2 pinout, MPC860TZQ50D4R2 application, or MPC860TZQ50D4R2 equivalent, key selection criteria include its 357-pin PBGA ZQ package, dual-voltage 3.3 V core/I/O with 5 V-tolerant inputs, CPM offload capability for HDLC/PPP/UART protocols, and thermal design constraints requiring junction-to-board resistance (RθJB = 13 °C/W) management under 95 °C max Tj.

Technical Context

The MPC860TZQ50D4R2 implements a superscalar Power Architecture™ CPU core with MMU, 32 GPRs, and branch prediction, paired with an enhanced MC68360-derived CPM supporting eight serial DMA channels and four SCCs. Its memory controller supports eight banks with programmable wait states, DRAM/SRAM/Flash glueless interfacing, and boot-selectable 8/16/32-bit width.

It integrates IEEE 1149.1 JTAG debug, real-time clock, periodic interrupt timer, software watchdog, and clock synthesizer within the System Integration Unit (SIU). The CPM handles time-critical communications tasks - including HDLC, UART, IrDA, and ATM cell processing - freeing the CPU for application-layer processing in embedded networking systems.

Key Specifications

Pinout & Package

357-pin Plastic Ball Grid Array (PBGA), ZQ package per case number 5058 (1103D-02), 25 mm × 25 mm body, 1.27 mm ball pitch, 1.2 mm package height. Thermal balls (GND) arranged in perimeter and center array for board-level heat conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC860TZQ50D4R2, MPC860PZP50D4 offers higher cache but inferior thermal performance in forced-air environments, while MPC855TVR50B trades UTOPIA for PCI expandability - making the original optimal for cost-sensitive, thermally managed UTOPIA ATM deployments.

Availability

MPC860TZQ50D4R2 is available at Aetrix Electronics and suitable for DSLAM line cards, industrial protocol gateways, enterprise branch routers, and secure RTUs requiring stable component supply across extended product lifecycles.

Supply support for MPC860TZQ50D4R2 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with heritage in Freescale's Power Architecture and communications processor IP.

The MPC860TZQ50D4R2 belongs to the PowerQUICC™ family - designed specifically for embedded networking applications demanding integrated CPU+CPM processing, hardware-accelerated protocol offload, and long-term industrial availability.

FAQ

What is the maximum operating frequency of the MPC860TZQ50D4R2?

The MPC860TZQ50D4R2 is rated for a maximum system clock frequency of 50 MHz, as confirmed by Freescale's Hardware Specifications Rev. 10. This frequency governs both the CPU core and CPM operation, and all AC timing parameters - including bus setup/hold times and CLKOUT jitter - are validated at this speed. Operating above 50 MHz violates the device's maximum tolerated ratings and may cause functional failure or accelerated wear. The MPC860TZQ50D4R2 does not support overclocking or binning beyond its specified 50 MHz rating.

Does the MPC860TZQ50D4R2 support IEEE 802.3u 100 Mbps Ethernet?

Yes, the MPC860TZQ50D4R2 supports full IEEE 802.3u-compliant 10/100 Mbps Ethernet on its four Serial Communication Controllers (SCC1–SCC4), as documented in Section 2 Features and Table 1 of the MPC860 Hardware Specifications. This capability requires external PHY devices and proper MII interface routing. The CPM handles MAC-layer functions including CRC generation/checking, frame alignment, and pause frame processing - offloading the CPU and enabling wire-speed forwarding at 100 Mbps with appropriate buffer allocation.

What package type and pin count does the MPC860TZQ50D4R2 use?

The MPC860TZQ50D4R2 uses a 357-pin Plastic Ball Grid Array (PBGA) package with ZQ designation (case number 5058, 1103D-02), measuring 25 mm × 25 mm with 1.27 mm ball pitch and 1.2 mm height. This package features thermal balls connected to ground for board-level heat dissipation and is distinct from the ZP variant (5050, 0.9 mm height). The pinout is fully documented in the MPC860 Hardware Specifications Appendix A and matches the standard MPC860 family layout - confirming compatibility with existing PowerQUICC socket designs.

Can the MPC860TZQ50D4R2 operate with a 5 V input supply?

No, the MPC860TZQ50D4R2 requires a 3.3 V nominal supply (VDDH/VDDL = 3.135–3.465 V at >40 MHz) and is not rated for 5 V operation. However, most I/O pins - excluding EXTAL and EXTCLK - tolerate input voltages up to 5.5 V (VIH = 2.0–5.5 V), enabling direct interfacing with 5 V logic without level shifters. The EXTAL and EXTCLK pins accept only 0.7×VDDH to VDDH+0.3 V, mandating 3.3 V-compatible clock sources. Applying 5 V to VDDH/VDDL will permanently damage the device.

What debugging interfaces are available on the MPC860TZQ50D4R2?

The MPC860TZQ50D4R2 includes IEEE 1149.1 (JTAG) Test Access Port for boundary-scan testing and on-chip emulation, plus eight hardware watchpoint comparators - four for instruction address, two for data address, and two for data value - supporting precise breakpoint triggering. These features are accessible via standard JTAG debug probes (e.g., Lauterbach TRACE32 or Segger J-Link) and enable non-intrusive real-time debugging, memory inspection, and register tracing without halting CPU execution, essential for validating time-critical communications firmware on the MPC860TZQ50D4R2.