NXP Semiconductors MPC8555ECVTAJD

Overview

MPC8555ECVTAJD from NXP Semiconductors (formerly Freescale) is a PowerQUICC™ III integrated communications processor featuring an e500 core, 256 KB on-chip L2 cache/SRAM, dual 10/100/1000 Ethernet controllers, DDR SDRAM controller, PCI 2.2 interface, and hardware security engine - deployed in telecom infrastructure, wireless base stations, and enterprise networking equipment.

For engineers reviewing the MPC8555ECVTAJD datasheet, MPC8555ECVTAJD pinout, MPC8555ECVTAJD application, or MPC8555ECVTAJD equivalent, key selection criteria include its 667 MHz e500 core frequency, 2.5 V DDR I/O voltage compatibility, 783-pin FC-PBGA package, IEEE 802.3z-compliant TSECs, and integrated cryptographic acceleration for IPSec/SSL offload.

Technical Context

The MPC8555ECVTAJD implements a dual-issue, 7-stage superscalar e500 core compliant with Power Architecture Book E, paired with a high-performance RISC-based Communications Processor Module (CPM) operating up to 333 MHz. It integrates OCeaN packet-switch fabric for internal traffic arbitration between TSECs, FCCs, and SCCs.

Its DDR SDRAM controller supports 64-bit data width, four banks, up to 1 Gbyte per bank, and full ECC on 64-bit boundaries. The security engine includes four crypto-channels with dedicated AESU, DEU, PKEU, MDEU, and RNG units - enabling concurrent IPSec, SSL/TLS, and IEEE 802.11i protocol processing without CPU intervention.

Key Specifications

Pinout & Package

The MPC8555ECVTAJD is housed in a 783-ball Fine-Pitch Ceramic Ball Grid Array (FC-PBGA) package with 1.0 mm ball pitch, designed for high-density routing and thermal dissipation in telecom line cards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC8555ECVTAJD, MPC8548CZQAAH trades security acceleration for higher clock speed and larger L2 cache, while P1022NSE offers architectural evolution with dual cores and SerDes but mandates layout changes - making MPC8555ECVTAJD optimal for cost-sensitive, crypto-intensive legacy telecom upgrades.

Availability

MPC8555ECVTAJD is available at Aetrix Electronics and suitable for wireless infrastructure, telecom access gateways, and enterprise routing applications requiring stable component supply across extended product lifecycles.

Supply support for MPC8555ECVTAJD 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and communications markets.

The MPC8555ECVTAJD belongs to the PowerQUICC™ III family - engineered specifically for integrated communications processing in carrier-grade networking and telecom infrastructure where deterministic latency, hardware crypto acceleration, and multi-protocol interface consolidation are critical.

FAQ

What is the maximum supported DDR SDRAM data rate for the MPC8555ECVTAJD?

The MPC8555ECVTAJD DDR SDRAM controller supports first-generation DDR SDRAM up to 266 MHz (DDR-266), delivering a peak theoretical bandwidth of 2.1 GB/s across its 64-bit interface. It supports four banks, programmable timing parameters, and full ECC protection on 64-bit boundaries. This capability enables efficient packet buffering and firmware execution in telecom line cards. The MPC8555ECVTAJD requires 2.5 V SSTL2-compatible signaling and external MVREF reference at GVDD/2.

Does the MPC8555ECVTAJD support PCIe or only legacy PCI?

The MPC8555ECVTAJD implements PCI 2.2 compliance only - supporting 33 MHz or 66 MHz operation in either 64-bit or dual 32-bit configurations. It does not support PCIe, Serial RapidIO, or other high-speed serial interconnects. Its PCI interface operates at 3.3 V and supports both host and agent modes, with 64-bit DAC addressing and memory prefetching. For PCIe-based designs, engineers should consider NXP's QorIQ P-series successors like the P1022NSE. The MPC8555ECVTAJD remains suitable for legacy add-in card expansion in telecom chassis.

How many independent Ethernet MACs does the MPC8555ECVTAJD integrate?

The MPC8555ECVTAJD integrates two independent Three-Speed Ethernet Controllers (TSECs), each capable of 10/100/1000 Mbps operation. They support GMII, MII, TBI, RGMII, and RTBI physical interfaces and include 2 KB transmit/receive FIFOs, jumbo frame support up to 9.6 KB, and RMON statistics collection. Both TSECs operate concurrently and can be configured for separate network segments or link aggregation. This dual-MAC architecture makes the MPC8555ECVTAJD ideal for router control/data plane separation or redundant WAN interfaces. The MPC8555ECVTAJD does not include additional MACs beyond these two TSECs.

What cryptographic algorithms are accelerated by the MPC8555ECVTAJD security engine?

The MPC8555ECVTAJD security engine accelerates AES-128/192/256, DES/3DES, SHA-1/256, MD5, HMAC, RSA-2048, Diffie-Hellman, and elliptic curve cryptography (F2m/Fp up to 511 bits). It features four crypto-channels with dedicated execution units - AESU, DEU, PKEU, MDEU, and RNG - enabling concurrent protocol processing for IPSec, SSL/TLS, IEEE 802.11i, iSCSI, and IKE. The MPC8555ECVTAJD achieves line-rate encryption for 1 Gbps Ethernet links without CPU overhead, confirmed by Freescale's hardware specification documentation.

Is the MPC8555ECVTAJD pin-compatible with other PowerQUICC III processors?

No, the MPC8555ECVTAJD is not pin-compatible with other PowerQUICC III processors such as the MPC8548 or MPC8560 due to differences in ball count, power rail allocation, and signal assignment. It uses a 783-ball FC-PBGA package with specific voltage domains (VDD, GVDD, LVDD, OVDD) and sequencing requirements. While software and architectural compatibility exists within the PowerQUICC III family, hardware design reuse requires verification against each device's package drawing and pin listing. The MPC8555ECVTAJD's unique pinout supports its integrated OCeaN fabric and dual-TSEC layout - making direct PCB substitution infeasible without redesign.