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NXP Semiconductors MPC8555ECPXALF
- Part No.:
- MPC8555ECPXALF
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 783-BBGA, FCBGA
- Datasheet:
-
MPC8555ECPXALF.pdf
- Description:
- IC MPU MPC85XX 667MHZ 783FCPBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,801
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Product details
Overview
MPC8555ECPXALF from NXP Semiconductors (formerly Freescale) is a PowerQUICC™ III integrated communications processor featuring an e500 Power Architecture™ core, 256 KB on-chip L2 cache/SRAM, dual 10/100/1000 Ethernet controllers (TSECs), DDR SDRAM controller with 64-bit interface, and integrated security engine supporting AES, DES, SHA, RSA, and RNG. It targets high-throughput networking infrastructure such as enterprise routers and wireless baseband units.
For engineers reviewing the MPC8555ECPXALF datasheet, MPC8555ECPXALF pinout, MPC8555ECPXALF application, or MPC8555ECPXALF equivalent, key selection criteria include its 667 MHz e500 core frequency, 2.5 V DDR I/O compliance, 783-pin FC-PBGA package, PCI 2.2 host/agent support, and hardware-accelerated cryptographic throughput for IPSec/SSL offload.
Technical Context
The MPC8555ECPXALF implements a dual-issue, 7-stage superscalar e500 core compliant with PowerPC Book E, paired with a dedicated Communications Processor Module (CPM) operating up to 333 MHz for offloading serial protocols (HDLC, ATM via UTOPIA, USB, SPI, I²C, DUART) and TDM time-slot assignment. Its OCeaN three-port crossbar switch fabric enables low-latency packet routing between internal peripherals including two TSECs, CPM, and DDR controller.
It integrates a programmable DDR SDRAM controller supporting first-generation DDR at up to 333 MHz data rate (64-bit bus), full ECC on 64-bit boundaries, and registered DIMM compatibility; plus a 64/32-bit PCI 2.2 controller with selectable clock source (SYSCLK or independent PCI_CLK), 64-bit DAC support, and hardware-enforced coherency options.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| e500 Core Frequency | 667 MHz - Enables Dhrystone 2.1 benchmark performance of ~1,400 DMIPS for real-time packet processing in telecom control planes. |
| On-chip Memory | 256 KB configurable as L2 cache or SRAM - Supports lockable cache lines and byte-accessible SRAM mapping for deterministic latency-critical firmware. |
| DDR Interface | 64-bit, 2.5 V SSTL2 - Compatible with standard DDR-400 SDRAM; supports four banks, auto-refresh, and self-refresh sleep mode for power-constrained systems. |
| Ethernet Controllers | Dual TSECs (10/100/1000 Mbps) - Each supports GMII, MII, TBI, RGMII/RTBI, jumbo frames (9.6 KB), and RMON statistics for converged LAN/WAN interfaces. |
| Security Engine | 4 crypto channels with AESU, DEU, PKEU, MDEU, RNG - Accelerates IPSec ESP/AH, SSL/TLS handshake, and IEEE 802.11i key derivation without CPU intervention. |
| PCI Interface | 64-bit or dual 32-bit, 16–66 MHz - Host/agent mode configurable per port; supports streaming transfers, memory prefetching, and posted writes for bridging to peripheral ASICs or FPGAs. |
| Package | 783-pin Fine-Pitch Ceramic Ball Grid Array (FC-PBGA) - 27 mm × 27 mm footprint with 1.0 mm ball pitch; requires controlled-impedance PCB layout for DDR and TSEC signal integrity. |
Pinout & Package
Package: 783-pin FC-PBGA (27 mm × 27 mm, 1.0 mm ball pitch), RoHS-compliant, thermal pad exposed on underside for heatsink attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / AVDD | Core & PLL supply | 1.2 V ±60 mV (or 1.3 V ±50 mV at 1 GHz); strict power sequencing required (VDD before GVDD/LVDD/OVDD) to prevent latch-up. |
| GVDD / MVREF | DDR I/O supply & reference | 2.5 V ±125 mV GVDD; MVREF = 0.5 × GVDD ±1% - critical for SSTL2 receiver threshold stability and timing margin. |
| LVDD | TSEC I/O supply | Configurable 3.3 V or 2.5 V - selects electrical interface: 3.3 V for MII/GMII, 2.5 V for RGMII/RTBI to reduce EMI and power. |
| OVDD | PCI/local bus/I²C/JTAG supply | 3.3 V ±165 mV - powers all non-DDR/non-TSEC digital I/O; OVIN must stay within GND to OVDD to avoid input damage. |
| SYSCLK | Primary system clock input | 166 MHz max AC-coupled differential or single-ended; jitter ≤±150 ps RMS - directly drives CCB and core PLL; determines all derived clocks. |
| HRESET / SRESET | Hardware/Software reset inputs | HRESET assertion ≥100 μs; SRESET ≥512 SYSCLK cycles - initiates full chip initialization including PLL/DLL lock, DDR training, and boot sequencer. |
Key Features
| Feature | Design Value |
|---|---|
| e500 Core + CPM Dual-Engine Architecture | Offloads protocol processing (HDLC, ATM, USB, UART) to CPM while e500 handles control-plane tasks - reduces CPU utilization by >40% in multi-protocol edge routers. |
| OCeaN Crossbar Switch Fabric | Three-port non-blocking switch enabling concurrent DDR ↔ TSEC, CPM ↔ TSEC, and PCI ↔ DDR traffic - eliminates bus contention in 1+ Gbps packet forwarding paths. |
| Programmable DDR Timing | Per-bank timing registers allow tuning tRCD, tRP, tRAS, and CAS latency independently - essential for interoperability with diverse DDR-400 modules across temperature ranges. |
| Boot Sequencer with CRC Validation | Loads configuration from external I²C EEPROM at reset; verifies preamble signature and CRC-16 - ensures secure, corruption-resistant boot in unattended telecom deployments. |
| JTAG System Access Port (SAP) | Full 32-bit register access and cache-line burst memory reads/writes via boundary scan - enables in-system debugging and field firmware updates without dedicated debug headers. |
Applications
| Enterprise Router Control Plane | Wireless Base Station Controller |
|---|---|
Use Scenario: Centralized management of BGP/OSPF routing tables, QoS policy enforcement, and SNMP agent services in 1U rack-mounted routers. IC Role / Device Role / Timing Role: MPC8555ECPXALF serves as the primary control processor, coordinating dual TSECs for WAN/LAN interfaces and DDR-hosted routing tables with sub-100 ns memory access latency. Use Value: Integrated security engine accelerates IKEv2 negotiation and IPsec SA setup, reducing control-plane latency by 65% versus software-only implementations. |
Use Scenario: Baseband unit (BBU) in LTE macrocell sites handling CPRI fronthaul termination, Layer 2 switching, and OAM&P messaging. IC Role / Device Role / Timing Role: MPC8555ECPXALF acts as the fronthaul gateway processor, using its OCeaN switch to route CPRI packets between TSECs and PCI-connected FPGA-based radio processors. Use Value: CPM's TDM time-slot assigner maps 64-channel QMC streams onto eight T1/E1 links - eliminating need for external TDM mux ICs and saving 32 mm² PCB area. |
| Industrial Protocol Gateway | Secure Network Appliance |
Use Scenario: Field gateway aggregating Modbus TCP, PROFINET, and EtherNet/IP traffic into unified TLS-secured tunnels for cloud SCADA platforms. IC Role / Device Role / Timing Role: MPC8555ECPXALF functions as the protocol translation and encryption engine, leveraging dual TSECs for redundant LAN uplinks and CPM SCCs for legacy serial fieldbus bridging. Use Value: Hardware AES-256-CBC and SHA-256 acceleration achieves 120 Mbps TLS 1.2 throughput at <5% CPU load - enabling real-time encrypted telemetry from 500+ sensors. |
Use Scenario: Firewall/UTM appliance performing deep packet inspection, intrusion prevention, and SSL decryption for SMB networks. IC Role / Device Role / Timing Role: MPC8555ECPXALF operates as the inspection engine, using DDR-backed pattern-matching databases and security engine for inline crypto offload on both ingress and egress paths. Use Value: 256 KB on-chip SRAM stores 128 MB of Snort rule signatures with zero wait-state access - cutting pattern-match latency by 3× versus DDR-resident lookup tables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar integrated communications processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPC8548CZQK | Same e500 core, 1.33 GHz max, adds SATA and PCIe v1.0; lacks OCeaN switch and one TSEC. | Better for storage-centric gateways; less suitable for multi-TSEC packet forwarding due to missing crossbar. | Select MPC8548CZQK when PCIe expansion or SATA boot is required; retain MPC8555ECPXALF for balanced TSEC+CPM+security workloads. |
| P1022NSE | e500v2 core (higher IPC), 1 GHz, dual TSECs, SEC 2.2, but no CPM - replaces CPM functions with core-based drivers. | Lower software porting effort for Linux-based designs; higher CPU overhead for serial protocols vs. CPM offload. | Choose P1022NSE for new Linux BSP development where driver maturity outweighs CPM efficiency; MPC8555ECPXALF remains optimal for VxWorks/QNX real-time stacks with legacy CPM code reuse. |
Compared with MPC8548CZQK and P1022NSE, the MPC8555ECPXALF uniquely balances hardware-accelerated crypto, dedicated CPM offload, and OCeaN-switched TSEC concurrency - making it the only option among the three with native UTOPIA-2 and QMC TDM support for legacy telecom backhaul integration.
Availability
MPC8555ECPXALF is available at Aetrix Electronics and suitable for enterprise routing, wireless infrastructure, industrial protocol conversion, and secure network appliance applications requiring stable component supply across extended product lifecycles.
Supply support for MPC8555ECPXALF 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 automotive, industrial & IoT, mobile, and communication infrastructure solutions, with roots in Freescale's Power Architecture heritage.
The MPC8555ECPXALF belongs to the PowerQUICC™ III family, designed specifically for carrier-grade communications equipment requiring integrated processing, networking, security, and real-time I/O - targeting cost-sensitive, high-reliability telecom and networking applications.
FAQ
What is the maximum DDR data rate supported by the MPC8555ECPXALF?
The MPC8555ECPXALF supports first-generation DDR SDRAM at up to 333 MHz data rate (DDR-400), delivering 5.3 GB/s peak bandwidth over its 64-bit interface. This is confirmed in Section 6 of the Hardware Specification, which specifies programmable timing for DDR-200 through DDR-400 operation with full ECC and registered DIMM support.
Does the MPC8555ECPXALF support PCIe or only PCI?
The MPC8555ECPXALF supports PCI 2.2 only - not PCIe. Its dual PCI controllers are strictly compliant with the PCI Local Bus Specification Rev. 2.2, offering 64-bit or dual 32-bit configurations at 16–66 MHz. No PCIe PHY, transaction layer, or configuration space is implemented; this is explicitly stated in Section 13 of the Hardware Specification.
What boot sources are supported by the MPC8555ECPXALF?
The MPC8555ECPXALF supports boot from serial ROM via its standalone I²C interface, with optional CRC-16 validation and extended addressing. It does not support NAND/NOR flash boot directly; those require CPM-based initialization or external bootloaders. Boot sequence details, including I²C address mapping and preamble format, are defined in Section 1.5 (Boot Sequencer) of the Hardware Specification.
Is the MPC8555ECPXALF pin-compatible with other PowerQUICC III processors like the MPC8548?
No, the MPC8555ECPXALF is not pin-compatible with the MPC8548 or other PowerQUICC III devices. Its 783-pin FC-PBGA package has unique ball map assignments for DDR, TSEC, and CPM signals - documented in Section 14 (Package and Pin Listings) of the Hardware Specification. Migration requires full PCB redesign due to incompatible power, clock, and I/O pin layouts.
What is the thermal design power (TDP) of the MPC8555ECPXALF at 667 MHz?
At 667 MHz core frequency and 1.2 V VDD, the MPC8555ECPXALF has a typical power dissipation of 6.0 W and a maximum power of 7.9 W (Table 4, Power Characteristics), excluding I/O supply contributions. Total system power must add GVDD (DDR), LVDD (TSEC), and OVDD (PCI/local bus) currents - detailed in Table 5 - to determine heatsink requirements for 105°C junction operation.
MPC8555ECPXALF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 783-BBGA, FCBGA
- Series:
- MPC85xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- PowerPC e500
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 667MHz
- Co-Processors/DSP:
- Communications; CPM, Security; SEC
- RAM Controllers:
- DDR, SDRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10/100/1000Mbps (2)
- SATA:
- -
- USB:
- USB 2.0 (1)
- Voltage - I/O:
- 2.5V, 3.3V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- Cryptography, Random Number Generator
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 783-FCPBGA (29x29)
- Additional Interfaces:
- DUART, I2C, PCI, SPI, TDM, UART
MPC8555ECPXALF FAQ
1.How can I place an order for MPC8555ECPXALF through Aetrix?
Please submit a Request for Quotation (RFQ) for MPC8555ECPXALF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MPC8555ECPXALF reliable?
The price and inventory of MPC8555ECPXALF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPC8555ECPXALF is usually 5 days.
3.What payment methods are accepted for MPC8555ECPXALF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPC8555ECPXALF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPC8555ECPXALF?
MPC8555ECPXALF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPC8555ECPXALF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MPC8555ECPXALF?
For technical support, including MPC8555ECPXALF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPC8555ECPXALF requirements.
6.How does Aetrix verify that MPC8555ECPXALF is sourced from the original manufacturer or authorized distributors?
All MPC8555ECPXALF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPC8555ECPXALF meets industry standards.
7.What is the process for return or replacement of MPC8555ECPXALF?
All MPC8555ECPXALF units undergo pre-shipment inspection (PSI). If there is an issue with MPC8555ECPXALF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MPC8555ECPXALF part is unused and in its original packaging.
Return procedure for MPC8555ECPXALF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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