NXP Semiconductors MPC853TVR66A

Overview

MPC853TVR66A from Freescale Semiconductor is a PowerPC architecture-based integrated communications controller featuring an MPC8xx core, 1.8-V core/3.3-V I/O operation, 66-MHz external bus support, 4-Kbyte instruction and data caches, and integrated Fast Ethernet Controller (FEC). It serves as a single-chip solution for embedded networking control in CPE equipment, Ethernet routers, VoIP clients, and Wi-Fi access points.

For engineers reviewing the MPC853TVR66A datasheet, MPC853TVR66A pinout, MPC853TVR66A application, or MPC853TVR66A equivalent, this page delivers verified technical context, validated package mapping, confirmed timing and power specifications, and real-world Ethernet control use cases - all grounded in Freescale's MPC853T Hardware Specification Rev. 1 (2004).

Technical Context

The MPC853TVR66A integrates three major modules on a 32-bit internal bus: an MPC8xx core (up to 100 MHz), a System Integration Unit (SIU) with clock synthesizer and IEEE 1149.1 JTAG interface, and a Communications Processor Module (CPM) with 8-Kbyte dual-port RAM and eight serial DMA channels. Its memory controller supports eight banks with programmable wait states and glueless interfacing to DRAM, SRAM, Flash, and EPROM.

It implements PowerPC architecture compliance with MMUs (32-entry TLB), branch prediction, and physically addressed caches. The FEC supports 10-Mbps Ethernet/IEEE 802.3 via SCC3/SCC4, while the time-slot assigner enables TDM bus operation for ISDN, PCM, and T1/CEPT applications - all operating under 1.8-V core and 3.3-V I/O with 5-V tolerant pins.

Key Specifications

Pinout & Package

The MPC853TVR66A is packaged in a 352-pin PBGA (Plastic Ball Grid Array) with 1.27-mm pitch, compliant with JEDEC MO-205, and thermally characterized for four-layer board mounting with vias to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC860TVR66A, the MPC853TVR66A trades two SCCs and PCMCIA for lower gate count and power; versus MPC855TVR66A, it adds one SCC and PCMCIA at minimal silicon cost - making it optimal for dual-protocol (e.g., Ethernet + HDLC) CPE designs requiring field-upgradable modem interfaces.

Availability

MPC853TVR66A is available at Aetrix Electronics and suitable for Ethernet router development, VoIP terminal manufacturing, and industrial protocol gateway production requiring stable component supply across extended lifecycle programs.

Supply support for MPC853TVR66A 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 markets.

The MPC853TVR66A belongs to the PowerQUICC™ family - a line of integrated communications controllers engineered specifically for cost-sensitive, low-power embedded networking applications requiring Ethernet, TDM, and serial protocol convergence in a single chip.

FAQ

What is the maximum supported external bus frequency for the MPC853TVR66A?

The MPC853TVR66A supports a maximum external bus frequency of 66 MHz in both 1:1 and 2:1 bus modes. In 1:1 mode, core and bus frequencies match (e.g., 66 MHz core / 66 MHz bus); in 2:1 mode, the core runs at up to 100 MHz while the bus operates at 50 MHz. This is confirmed in Table 8 of the MPC853T Hardware Specification Rev. 1, which lists 66 MHz as the highest standard bus frequency rating for the MPC853TVR66A.

Does the MPC853TVR66A include a built-in Ethernet MAC?

Yes, the MPC853TVR66A integrates a Fast Ethernet Controller (FEC) that implements a full 10-Mbps Ethernet MAC layer with MII interface support. It supports IEEE 802.3 operation on SCC3 and SCC4, enabling direct connection to external PHY devices. This FEC is distinct from software-managed Ethernet implementations and is documented in Sections 4 and 14 of the MPC853T Hardware Specification.

What power supply sequencing requirements apply to the MPC853TVR66A?

The MPC853TVR66A requires strict power sequencing: VDDL (core) must never exceed VDDH (I/O) during power-up or power-down, and both must stay within absolute max ratings (VDDL ≤ 1.9 V, VDDH ≤ 3.465 V). Violation risks forward-biasing ESD diodes. Figure 2 in the specification shows a recommended Schottky diode-based sequencing circuit using MUR420 and 1N5820 diodes to enforce these constraints.

Which pins on the MPC853TVR66A are 5-V tolerant?

Thirty-seven pins on the MPC853TVR66A are 5-V tolerant, 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 5.5 V but must remain within 2.5 V above VDDH at all times - a constraint applying during power-up, power-down, and normal operation per Section 8 of the hardware spec.

Is the MPC853TVR66A pin-compatible with other MPC8xx-family devices?

No, the MPC853TVR66A is not pin-compatible with earlier MPC860 derivatives due to differences in peripheral allocation and ball mapping - particularly around PCMCIA, TSA, and FEC signal routing. While it shares the 352-pin PBGA package outline with MPC860TVR66A, the pin functions and power/ground ball assignments differ. Migration requires PCB redesign; refer to Table 15 in the MPC853T specification for mechanical ordering information and ball map details.