NXP Semiconductors MPC852TCVR50A

Overview

MPC852TCVR50A 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 voltage domains, and integrated Fast Ethernet Controller (FEC), CPM, SIU, and memory controller. It serves as a single-chip solution for embedded networking control in CPE equipment, VoIP clients, and WiFi access points.

For engineers reviewing the MPC852TCVR50A datasheet, MPC852TCVR50A pinout, MPC852TCVR50A application, or MPC852TCVR50A equivalent, this page delivers verified core frequency (50 MHz), bus speed (66 MHz), voltage domains (1.8 V core / 3.3 V I/O), thermal limits (Tj max = 95 °C), and FEC + CPM integration - all critical for power-aware, space-constrained Ethernet edge node designs.

Technical Context

The MPC852TCVR50A implements a single-issue, 32-bit PowerPC core with 4-Kbyte instruction and data caches (two-way set-associative), MMU with 32-entry TLB supporting 4/16/512 KB and 8 MB page sizes, and integrated System Integration Unit (SIU) providing clock synthesis, watchdog, PIT, and IEEE 1149.1 JTAG debug interface.

Its Communication Processor Module (CPM) includes an 8-Kbyte dual-port RAM, eight serial DMA channels, two SCCs supporting HDLC/UART/Ethernet (SCC3/SCC4), one SMC, SPI, PCMCIA-ATA interface, and two baud rate generators - enabling concurrent protocol handling without CPU intervention.

Key Specifications

Pinout & Package

Package: 272-pin PBGA (Plastic Ball Grid Array), 27 mm × 27 mm, 1.27 mm pitch, RoHS-compliant. Thermal pad on underside requires soldered connection to internal ground plane for optimal heat transfer.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC852TCVR50A, MPC866PZQ50B adds USB but demands core voltage redesign, while MPC8308CZQAA offers higher speed and PCIe yet removes CPM - making both unsuitable as direct replacements where hardware-accelerated serial protocol handling is mandatory.

Availability

MPC852TCVR50A is available at Aetrix Electronics and suitable for DSL gateways, VoIP terminal adapters, WiFi access point controllers, and industrial Ethernet bridges requiring stable component supply across extended product lifecycles.

Supply support for MPC852TCVR50A 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 MPC852TCVR50A belongs to the PowerQUICC™ family of integrated communications processors, designed specifically for cost-sensitive, power-efficient embedded networking applications requiring hardware-accelerated Ethernet and serial protocol handling.

FAQ

What is the maximum operating junction temperature for the MPC852TCVR50A?

The MPC852TCVR50A has a maximum junction temperature (Tj) of 95 °C under standard operating conditions. This limit applies when ambient temperature (TA) is 0–70 °C and thermal resistance RθJA is maintained at ≤49 °C/W on a single-layer board. Exceeding 95 °C risks permanent damage or functional failure; thermal design must include adequate board copper, airflow, or heatsinking to stay within this bound. The MPC852TCVR50A datasheet specifies this value in Table 2 under "Temperature 1 (standard)".

Does the MPC852TCVR50A support 100-Mbps Ethernet operation?

Yes, the MPC852TCVR50A integrates a Fast Ethernet Controller (FEC) compliant with IEEE 802.3 that supports full-duplex 10/100 Mbps operation over MII. Its FEC implements carrier sense, collision detection, and CRC generation/checking in hardware. However, actual 100-Mbps throughput depends on external PHY selection, PCB layout signal integrity, and software stack efficiency - the MPC852TCVR50A itself provides the MAC layer and MII interface, not the physical transceiver.

What are the mandatory reset configuration settings for the MPC852TCVR50A?

Upon HRESET assertion, the MPC852TCVR50A requires HRCW[DBGC] = X1 and SIUMCR[DBGC] = X1 to be programmed in boot code. Additionally, MBMR[GPLB4DIS] must be set to 0, and specific PAPAR/PADIR, PBPAR/PBDIR, and PCPAR/PCDIR bitfields must be initialized per Table 6 of the MPC852TEC Rev. 4 specification. Failure to configure these registers correctly results in undefined behavior or failure to exit reset.

Can the MPC852TCVR50A operate with a 100-MHz core clock?

No - the MPC852TCVR50A is rated for a maximum core frequency of 50 MHz, as indicated by its "R50A" suffix and confirmed in Table 7 (1:1 Bus Mode). While the broader MPC852T family includes variants up to 100 MHz (e.g., MPC852TCVR100A), the MPC852TCVR50A's silicon revision and characterization are validated only up to 50 MHz. Attempting 100 MHz operation violates electrical specifications and voids reliability guarantees.

Which pins on the MPC852TCVR50A are 5-V tolerant, and what are the constraints?

The MPC852TCVR50A 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 may tolerate up to 5.5 V, but must never exceed VDDH + 2.5 V - meaning if VDDH = 3.465 V, absolute max is 5.965 V, though 5.5 V is the hard limit. This constraint applies during power-up, power-down, and normal operation.