NXP Semiconductors MPC870CZT133

Overview

MPC870CZT133 from Freescale Semiconductor is a 32-bit Power Architecture™ microprocessor with integrated communications processor module (CPM), dual 10/100 Mbps Fast Ethernet controllers, USB 2.0 interface, and 8-Kbyte instruction/data caches - operating at 133 MHz core frequency in 2:1 bus mode, 1.8-V core / 3.3-V I/O supply, and packaged in 256-pin PBGA for embedded networking control applications.

For engineers reviewing the MPC870CZT133 datasheet, MPC870CZT133 pinout, MPC870CZT133 application, or MPC870CZT133 equivalent, key selection criteria include its dual-FEC support, CPM-based serial channel offload capability, 133-MHz PowerQUICC™ core performance, and lack of on-chip security engine - distinguishing it from the MPC875 variant.

Technical Context

The MPC870CZT133 integrates an MPC8xx core with MMU, two-way set-associative 8-Kbyte instruction and data caches, and a dedicated 32-bit RISC CPM for autonomous serial protocol handling (HDLC, UART, IrDA, BISYNC). Its system integration unit provides clock synthesis, JTAG debug, PIT, and software watchdog functions.

It supports 32-bit external bus operation up to 80 MHz (1:1 mode) or 133 MHz core with 66.5 MHz bus (2:1 mode), features four baud-rate generators, eight memory banks with DRAM/SRAM/Flash glueless interface, and dual MII/RMII-capable FECs - but omits the TSA, PCMCIA, and security engine found in MPC875.

Key Specifications

Pinout & Package

The MPC870CZT133 is housed in a 256-ball PBGA package (17 mm × 17 mm, 1.27 mm pitch) with perimeter I/O ball layout optimized for high-speed signal integrity and thermal dissipation via internal thermal vias to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC875CZT133, MPC870CZT133 removes security and TDM functionality to reduce cost and power, making it optimal for pure Ethernet/serial gateway use; versus MPC885CZQ133, it offers proven maturity and simpler migration from legacy MPC860 designs but lacks DDR2 and PCI.

Availability

MPC870CZT133 is available at Aetrix Electronics and suitable for industrial Ethernet gateways, DSL/cable modem control units, network-attached storage controllers, and secure remote terminal units requiring stable component supply across extended product lifecycles.

Supply support for MPC870CZT133 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 processors, analog, and connectivity solutions for automotive, industrial, and networking markets.

The MPC870CZT133 belongs to the PowerQUICC™ family - designed specifically for cost-sensitive, low-power communications processors in edge networking equipment where integrated FEC, CPM offload, and deterministic real-time response are critical.

FAQ

What is the maximum operating junction temperature for MPC870CZT133?

The MPC870CZT133 has a maximum junction temperature (TJ) of 95 °C for standard-grade operation, as specified in Table 3 of the hardware specifications. This limit applies under natural convection cooling on a single-layer board; derating is required above ambient temperatures of 0 °C. Thermal design must ensure TJ remains ≤95 °C during sustained 133-MHz operation with dual FEC active, using RθJA = 43 °C/W as baseline. MPC870CZT133 thermal performance is validated per JEDEC JESD51-2 standards.

Does MPC870CZT133 support 1:1 bus mode at 133 MHz?

No, MPC870CZT133 does not support 1:1 bus mode at 133 MHz. Per Section 2 Features, the 133-MHz core frequency is only valid in 2:1 bus mode (i.e., 66.5 MHz bus clock). The 1:1 mode is limited to 66 MHz or 80 MHz core frequencies. Attempting 133 MHz in 1:1 mode violates timing specifications and may cause bus arbitration failures or data corruption. MPC870CZT133's bus interface is explicitly rated for max 80 MHz in 1:1 configuration.

Is MPC870CZT133 pin-compatible with MPC875CZT133?

Yes, MPC870CZT133 and MPC875CZT133 share identical 256-ball PBGA mechanical packaging, pinout, and power sequencing requirements. All signal, power, and ground ball assignments match per Table 16 (Mechanical Data and Ordering Information) in the hardware spec. However, MPC875CZT133 activates additional functions on shared pins (e.g., TSA and security engine signals), so PCBs designed for MPC870CZT133 can accept MPC875CZT133 without modification, but not vice versa if those features are routed.

What USB modes does MPC870CZT133 support in hardware?

MPC870CZT133 supports USB 2.0 full-speed (12 Mbps) and low-speed (1.5 Mbps) operation in both function endpoint and host controller roles. As a function, it implements control/bulk/interrupt/isochronous endpoints with CRC16/5, NRZI encoding, and automatic retransmission. As a host, it supports all transfer types but restricts low-speed operation to external hub configurations. MPC870CZT133 USB compliance is verified per USB 2.0 specification sections 7–9, with no OTG support.

How is cache coherency maintained between instruction and data caches in MPC870CZT133?

MPC870CZT133 maintains cache coherency for both instruction and data caches on 128-bit (4-word) cache blocks using physical addressing and a least-recently-used (LRU) replacement algorithm. Coherency is enforced automatically by hardware during cache line fills, writebacks, and invalidations - no software cache maintenance instructions are required for normal operation. Each cache is lockable per block, and MPC870CZT133 implements separate 32-entry fully associative TLBs for instruction and data translation.