MPC853TVR66A

Overview

The MPC853TVR66A is a microprocessor based on the PowerQUICC family, utilizing an embedded MPC8xx core. It operates at a maximum frequency of 100 MHz with a 66-MHz external bus interface. The device features a 32-bit data bus width and utilizes a PBGA-357 package for surface mount installation. Internal memory includes 4-Kbyte instruction cache and 4-Kbyte data cache. The processor requires a 1.8-V core voltage and supports 3.3-V I/O operation with 5-V TTL compatibility.

Feature Summary

• Integrated Fast Ethernet Controller (FEC) supporting 10-Mbps full-duplex operation via MII or NMSI interfaces.
• Communications Processor Module (CPM) providing serial communication controllers (SCCs), serial management channels (SMCs), and dual-port RAM.
• System Integration Unit (SIU) managing bus monitoring, software watchdogs, periodic interrupts, and clock synthesis.
• Memory controller supporting DRAM, SIMMs, SRAM, EPROMs, and Flash EPROMs with glueless interface capabilities.

Applications

• Ethernet routers and hubs
• Customer Premises Equipment (CPE)
• VoIP clients
• Wi-Fi access points

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm datasheet revision matches the specific lot code to ensure electrical characteristics align with design requirements. Check for moisture sensitivity levels and storage conditions prior to assembly. Ensure power sequencing circuits are implemented correctly to prevent ESD diode forward biasing during ramp-up.

Selection Notes

Select this component for applications requiring integrated communications control within a PowerPC architecture environment. Evaluate thermal resistance values against system airflow constraints, as junction temperature depends heavily on board layout and ambient conditions. Verify that the 1:1 or 2:1 bus mode configuration meets timing requirements for connected peripherals. Ensure PCB layout accommodates low-impedance paths for multiple power supply pins.

Part Context

This part belongs to the MPC866 PowerQUICC family, derived from the MPC860 quad integrated communications controller. It serves as a derivative optimized for specific frequency and peripheral configurations within the broader PowerQUICC ecosystem. The device integrates a RISC controller and specialized DMA channels to handle high-throughput serial data processing tasks efficiently.

Replacement Considerations

Consult official documentation for compatible derivatives within the MPC8xx series. Verify pinout and register compatibility before substituting with other MPC853 variants or MPC860 family members. Functional equivalence requires matching core architecture and peripheral sets.