NXP Semiconductors MPC852TCZT50A

Overview

MPC852TCZT50A from Freescale Semiconductor is a PowerPC architecture-based integrated communications controller featuring an MPC8xx 32-bit core operating up to 50 MHz, 66-MHz external bus, 1.8-V core/3.3-V I/O with 5-V TTL compatibility, and integrated Fast Ethernet Controller (FEC), CPM, and SIU - deployed in Ethernet routers, VoIP clients, and WiFi access points.

For engineers reviewing the MPC852TCZT50A datasheet, MPC852TCZT50A pinout, MPC852TCZT50A application, or MPC852TCZT50A equivalent, this page delivers verified core frequency, bus timing, thermal resistance (RθJA = 49°C/W), DC electrical specs (VDDL = 1.7–1.9 V, VDDH = 3.135–3.465 V), and mandatory reset configuration values required for boot code initialization.

Technical Context

The MPC852TCZT50A implements a single-issue 32-bit PowerPC core with 4-Kbyte instruction and data caches (two-way set-associative, 128 sets), MMU with 32-entry TLB supporting 4/16/512 KB and 8 MB page sizes, and integrated CPM RISC controller managing eight SDMA channels and 8-Kbyte dual-port RAM.

Its system integration unit provides IEEE 1149.1 JTAG debug interface, software watchdog, periodic interrupt timer, clock synthesizer, and low-power stop mode; the FEC supports MII interface for 10-Mbps Ethernet per IEEE 802.3 on SCC3/SCC4, while memory controller supports eight banks with dynamic bus sizing (8/16/32-bit) and glueless interfacing to DRAM, SRAM, Flash, and EPROM.

Key Specifications

Pinout & Package

Package: 256-pin PBGA (Plastic Ball Grid Array), 27 mm × 27 mm, 1.27 mm pitch - documented in MPC852TEC Rev. 4, Section 16.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC866PZQ50B and MPC875ZQ50B, the MPC852TCZT50A uniquely balances 10-Mbps FEC, PCMCIA, and compact 256-pin PBGA - making it the most cost-effective solution for legacy Ethernet CPE where USB or 100-Mbps is unnecessary.

Availability

MPC852TCZT50A is available at Aetrix Electronics and suitable for Ethernet routers, VoIP terminal adapters, and WiFi access points requiring stable component supply across extended product lifecycles.

Supply support for MPC852TCZT50A 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) designed high-performance PowerQUICC processors for networking and communications infrastructure.

The MPC852TCZT50A belongs to the PowerQUICC™ family - engineered specifically for cost-sensitive, low-power embedded communications controllers in customer premises equipment and edge networking devices.

FAQ

What is the maximum operating junction temperature for the MPC852TCZT50A?

The MPC852TCZT50A has a maximum guaranteed junction temperature (Tj) of 95°C under standard operating conditions. This limit applies when ambient temperature (TA) is maintained between 0°C and 70°C, and thermal design uses RθJA = 49°C/W on a single-layer board. Exceeding 95°C risks permanent silicon degradation and functional failure; thermal margin must be validated using TJ = TA + (RθJA × PD) with PD = 140 mW typical at 50 MHz.

Does the MPC852TCZT50A support 100-Mbps Ethernet operation?

No, the MPC852TCZT50A supports only 10-Mbps Ethernet via its Fast Ethernet Controller (FEC) on SCC3 and SCC4, compliant with IEEE 802.3 at 10 Mbps base-T. It lacks the hardware acceleration, MII timing margins, and PHY interface enhancements required for 100-Mbps operation - a capability introduced in later derivatives like the MPC866P.

What are the mandatory reset configuration settings for MPC852TCZT50A boot code?

The MPC852TCZT50A requires HRCW[DBGC] = X1 and SIUMCR[DBGC] = X1 in boot code after reset deassertion. Additionally, MBMR[GPLB4DIS] = 0, PAPAR/PADIR bitfields for Port A pins 4–7/12–15, PBPAR/PBDIR for Port B pins 14/16–23/26–27, and PCPAR/PCDIR for Port C pins 8–11/14 must be set to specified binary values per Table 6 of MPC852TEC Rev. 4.

Which pins on the MPC852TCZT50A are 5-V tolerant, and what are the voltage limits?

The MPC852TCZT50A has 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. These pins tolerate up to VDDH + 2.5 V (max 5.5 V absolute) - exceeding this violates absolute maximum ratings and risks latch-up or permanent damage.

Can the MPC852TCZT50A operate in 2:1 bus mode at 50 MHz core frequency?

No - the MPC852TCZT50A supports 2:1 bus mode only at core frequencies of 80 MHz and 100 MHz, per Table 8 of MPC852TEC Rev. 4. At 50 MHz core frequency, only 1:1 bus mode is valid, limiting external bus speed to 50 MHz. Attempting 2:1 mode at 50 MHz violates AC timing specifications and may cause memory interface failures.