NXP Semiconductors MPC852TCZT100A

Overview

MPC852TCZT100A from Freescale Semiconductor is a PowerPC architecture-based integrated communications controller featuring an MPC8xx 32-bit core operating up to 100 MHz, 66-MHz external bus, 1.8-V core / 3.3-V I/O with 5-V TTL compatibility, and on-chip Fast Ethernet Controller (FEC), CPM, and memory controller - deployed in Ethernet routers, VoIP clients, WiFi access points, and CPE equipment.

For engineers reviewing the MPC852TCZT100A datasheet, MPC852TCZT100A pinout, MPC852TCZT100A application, or MPC852TCZT100A equivalent, key selection considerations include core/bus frequency ratio (2:1 only at 80/100 MHz), 4-Kbyte instruction/data caches with LRU replacement, 32-entry MMU TLBs supporting 4/16/512 KB and 8 MB page sizes, and IEEE 1149.1 JTAG debug interface compliance.

Technical Context

The MPC852TCZT100A implements a single-issue PowerPC-compatible core with branch prediction and conditional prefetch, integrated with a System Integration Unit (SIU) handling reset control, PIT, watchdog, clock synthesis, and IEEE 1149.1 test access, plus a Communications Processor Module (CPM) containing an 8-Kbyte dual-port RAM, eight SDMA channels, and RISC-based serial protocol acceleration for SCCs, SMC, and SPI.

Its memory subsystem supports dynamic bus sizing (8/16/32-bit), 32 address lines, eight programmable DRAM banks with up to 30 wait states, glueless interfacing to DRAM/SRAM/Flash, and boot chip-select configurable for 8-/16-/32-bit memory - while FEC provides full 10-Mbps IEEE 802.3 operation on SCC3/SCC4 with MII interface support.

Key Specifications

Pinout & Package

Package: 256-pin PBGA (Plastic Ball Grid Array), 27 mm × 27 mm, 1.27 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC866PZQ100B and MPC823ZQ100B, the MPC852TCZT100A delivers the most cost-effective balance of 10-Mbps Ethernet integration, memory controller flexibility, and thermal efficiency for space-constrained CPE and VoIP endpoints - without over-specifying for unused features like USB or PCI.

Availability

MPC852TCZT100A is available at Aetrix Electronics and suitable for industrial Ethernet gateways, VoIP terminal controllers, and WiFi access point baseband designs requiring stable component supply and long-term lifecycle support.

Supply support for MPC852TCZT100A 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) was a leading designer of embedded processors and analog/mixed-signal ICs for automotive, industrial, and networking applications.

The MPC852TCZT100A belongs to the PowerQUICC™ family - engineered specifically for cost-sensitive, low-power communications controllers in broadband CPE, VoIP, and industrial Ethernet edge devices.

FAQ

What is the maximum supported external bus speed for the MPC852TCZT100A?

The MPC852TCZT100A supports a maximum external bus speed of 66 MHz. This is fixed regardless of core frequency; at 100 MHz core operation, the device must run in 2:1 bus ratio mode (i.e., 100 MHz core / 66 MHz bus). The hardware specification explicitly prohibits 1:1 operation above 66 MHz, and timing tables in the MPC852TEC Rev. 4 document confirm bus signal validity only up to 66 MHz.

Does the MPC852TCZT100A support 100-Mbps Fast Ethernet?

No, the MPC852TCZT100A does not support 100-Mbps Fast Ethernet. Its integrated Fast Ethernet Controller (FEC) is rated for full 10-Mbps IEEE 802.3 operation only, as confirmed in Section 2 Features ("Ethernet/IEEE 802.3® standard optional on SCC3 and SCC4, supporting full 10-Mbps operation"). The term "Fast Ethernet" in the product name refers to the controller's architectural capability-not physical layer speed-and no 100BASE-TX PHY interface or timing parameters are specified in the MPC852TEC documentation.

What are the mandatory reset configuration requirements for the MPC852TCZT100A?

The MPC852TCZT100A requires SIUMCR[DBGC] = X1 (binary) to be programmed in boot code after reset, and if HRCW is enabled, HRCW[DBGC] must also be set to X1. These settings are mandatory per Table 6 in the MPC852TEC Rev. 4 specification and ensure proper debug controller initialization and stable JTAG interface operation. Failure to configure these bits results in undefined behavior during boundary-scan testing and emulator attachment.

Which pins on the MPC852TCZT100A are 5-V tolerant?

The MPC852TCZT100A has 34 explicitly designated 5-V tolerant pins, including PA[0:3], PA[8:11], PB15, PB[24:25], PB[28:31], PC[4:7], PC[12:13], PC15, PD[3:15], TDI, TDO, TCK, TRST, TMS, MII_TXEN, and MII_MDIO - as listed in Table 5 and Section 9 of the MPC852TEC Rev. 4 document. All other inputs are limited to 3.465 V maximum, and no input may exceed VDDH + 2.5 V under any condition.

What thermal resistance values apply to the MPC852TCZT100A in a four-layer PCB environment?

In a four-layer board (2s2p) with horizontal airflow at 200 ft/min, the MPC852TCZT100A exhibits RθJMA = 29°C/W (junction-to-ambient), RθJB = 24°C/W (junction-to-board), and RθJC = 13°C/W (junction-to-case), per Table 3 of the MPC852TEC Rev. 4 specification. These values assume vias connecting thermal balls to the ground plane and are validated per JEDEC JESD51-6 and JESD51-8 standards.