MPC8555PXALF - PowerQUICC III 667MHz MPU, 783-FCPBGA | NXP
MPN: MPC8555PXALF ✗ End of LifeMPC8555PXALF Overview
What is a PowerQUICC III processor? A PowerQUICC (pronounced "power-quick") is a family of integrated communications processors originally developed by Motorola (later Freescale, now NXP) that combines a PowerPC processor core with specialized communications peripherals. The III generation extends the architecture with the e500 core, enhanced system logic, and integrated security engines, making it a single-chip solution for routing, switching, and embedded control. Within the broader taxonomy, it sits at: MPU -> microprocessor -> integrated circuit -> semiconductor.
Key features of the MPC8555PXALF include a 32-bit PowerPC e500 core at 667 MHz, dual 32-bit DDR memory controllers, dual Gigabit Ethernet MACs, a 32-bit PCI/PCI-X interface, and an integrated security engine. It supports supply voltages of 1.2V (core) and 2.5V/3.3V (I/O), with a 783-pin flip-chip BGA package measuring 29x29 mm at 1 mm pitch.
Architecturally, the MPC8555E uses a system-on-chip platform with separate internal buses for the e500 core, DDR controllers, and peripheral blocks. The integrated communications engine (CE) handles protocol processing independently of the core, freeing CPU cycles for control-plane tasks. Hardware encryption and pattern-matching accelerators support IPSec, SSL/TLS, and 3GPP wireless protocols at line rate.
Typical applications include enterprise routers, multiservice switches, DSLAM line cards, wireless base station controllers, and industrial control platforms requiring deterministic processing and high I/O bandwidth. The integrated DDR and Ethernet controllers reduce external component count.
Designers should note the 783-ball FCBGA requires a 1 mm-pitch PCB land pattern with matched-impedance routing for DDR traces. Thermal management is critical given the 7-12W typical dissipation; a multi-layer PCB with thermal vias under the die is recommended.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that supplement the manufacturer hardware specifications.
Drop-in alternatives for MPC8555PXALF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
MPC8555ECPXALF
✅ Drop-In📋 Reference alternative (not in catalog)
MPC8555EVTAPF
✅ Drop-InContact for price
View Datasheet →MPC8555ECVTALF
✅ Drop-In📋 Reference alternative (not in catalog)
MPC8555PXALF Maximum Ratings & Electrical Characteristics
| Core Architecture | PowerPC e500 |
| Core Count | 1 |
| Data Bus Width | 32-bit |
| Maximum Clock Frequency | 667 MHz |
| Supply Voltage (Core) | 1.2 V |
| Supply Voltage (I/O) | 2.5 V / 3.3 V |
| Package Type | FCBGA-783 (Flip-Chip BGA) |
| Package Dimensions | 29 x 29 mm |
| Ball Pitch | 1.0 mm |
| Package Height | 3.75 mm |
| Pin Count | 783 |
| Mounting Type | Surface Mount (Flip Chip) |
| Memory Controller | Dual DDR SDRAM |
| Ethernet | Dual Gigabit Ethernet MAC |
| PCI Interface | 32-bit PCI / PCI-X |
MPC8555PXALF 3.75 mm Pin Configuration Guide
Pin configuration for MPC8555PXALF (3.75 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MPC8555PXALF.
Refer to the datasheet for full pin configuration.
Typical Applications
MPC8555PXALF is suitable for 6 applications: Enterprise Router / WAN Edge, Multiservice Switch / ATCA Line Card, DSLAM / Broadband Aggregation, Wireless Base Station Controller (3GPP), Industrial Control / SCADA Platform, Secure VPN / Firewall Appliance.
Enterprise Router / WAN Edge
The MPC8555PXALF's 667 MHz e500 core, dual Gigabit Ethernet MACs, and integrated communications engine make it a drop-in SoC for enterprise router line cards. Its 32-bit PCI/PCI-X interface connects to co-processors for crypto or deep-packet inspection, while the dual DDR memory controller sustains line-rate throughput at gigabit speeds. The integrated CE offloads protocol processing, freeing CPU cycles for routing-table updates and management-plane tasks. Compared with discrete CPU-plus-MAC designs, this part reduces BOM by 5-7 chips.
Recommended
Multiservice Switch / ATCA Line Card
In ATCA and microTCA line cards, the MPC8555PXALF provides the control-plane processing for voice/video/data convergence. Its 32-bit PCI-X interface supports 133 MHz operation for high-bandwidth fabric connectivity, while the e500 core handles system management and signalling stacks. The integrated security engine in the 'EC' variants accelerates IPSec and MACsec, essential for carrier-grade encryption. The FCBGA-783 package supports the thermal envelope required in fan-cooled chassis.
Recommended
DSLAM / Broadband Aggregation
DSLAM line cards use the MPC8555PXALF as the aggregation processor, leveraging its dual Gigabit Ethernet uplinks and integrated communications engine for ATM and PPPoE protocol offload. The DDR memory controller supports the deep packet buffers required for ADSL2+/VDSL2 traffic shaping. Its deterministic interrupt response makes it suitable for real-time DSL framer coordination. Production DSLAM designs value the long-term supply and reference designs available for this PowerQUICC III SoC.
Recommended
Wireless Base Station Controller (3GPP)
The MPC8555PXALF's hardware encryption accelerators make it well-suited for 3GPP Node-B controllers, accelerating Kasumi, Snow 3G, and AES cipher operations. Its e500 core runs the real-time OS for radio resource management while the CE handles layer-1 timing. The PCI-X interface connects to baseband FPGA cards, and dual Gigabit Ethernet uplinks carry Iub traffic to the RNC. Power dissipation in the 7-12W range is manageable in 1U chassis designs.
Recommended
Industrial Control / SCADA Platform
For industrial SCADA controllers, the MPC8555PXALF offers a deterministic PowerPC core with rich peripheral integration: DUART, I2C, SPI, PCI, and local bus for legacy industrial I/O. Its long product lifecycle and NRND-but-supported status make it appropriate for infrastructure programs requiring 10+ year availability. Engineers pair it with discrete FPGA I/O expansion for high-channel-count analog acquisition.
Recommended
Secure VPN / Firewall Appliance
The MPC8555PXALF (or the 'EC' variants) integrates IPSec, SSL/TLS, and 3GPP cipher accelerators that offload VPN encryption from the CPU. Combined with the dual Gigabit Ethernet MACs and PCI-X for NIC expansion, it is a complete SoC for SMB VPN/firewall appliances. The 667 MHz e500 core handles policy lookup and management-plane tasks at line rate.
Recommended
Recommended Products Summary
Engineering reference data for MPC8555PXALF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPC8555ECPXALF | MPC8555EVTAPF | MPC8555ECVTALF |
|---|---|---|---|---|
| Package | FCBGA-783 (29x29 mm) | FCBGA-783 - same | FCBGA-783 - same | FCBGA-783 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core Architecture | PowerPC e500 | PowerPC e500 | PowerPC e500 | PowerPC e500 |
| Clock Frequency | 667 MHz | 667 MHz | 667 MHz | 667 MHz |
| Security Engine | Optional (PX variant without) | Yes (integrated) | Yes (integrated) | Yes (integrated) |
| Core Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| Pin Count | 783 | 783 | 783 | 783 |
| Data Bus Width | 32-bit | 32-bit | 32-bit | 32-bit |
Key Differentiators
- Same 783-FCPBGA footprint as 'EC' security variants (vs MPC8555ECPXALF)
- 667 MHz e500 core with proven PowerQUICC III ecosystem (vs MPC8536CVJAULA)
- Drop-in 783-FCPBGA family compatibility (vs MPC8555EVTAPF)
Design Notes
The 783-ball FCBGA at 1.0 mm pitch requires a 4-layer minimum PCB with microvia stack-ups for breakout. Matched-impedance routing (50 ohm single-ended, 100 ohm differential) is required for DDR, PCI-X, and Gigabit Ethernet traces. Place decoupling capacitors as close as possible to the BGA balls, with a mix of 0.1 uF, 1 nF, and 10 uF bulk values per the NXP hardware specifications reference design.
Power dissipation is approximately 7-12W typical depending on CPU utilization. Use a thermal-via array directly under the die (center of the package) connecting to internal copper planes, with the top-layer copper pour stitched with thermal vias. The FCBGA flip-chip construction exposes the die for direct PCB heat extraction; a heatsink is recommended for closed chassis without forced airflow.
Multiple supply rails (1.2V core, 2.5V/3.3V I/O, DDR voltage) require power-up sequencing per the NXP hardware specifications. Use a supervisor IC or the MPC8555PXALF's built-in power-on reset logic to enforce the proper sequence. Inrush current on the 1.2V core rail can exceed 4A at full clock; size the regulator and bulk capacitors accordingly.
DDR traces must be length-matched within 50 mil tolerance for the byte lanes. Place the DDR termination resistors at the far end of the bus to minimize reflections. The PCI-X bus requires 50 ohm impedance and source termination; consult the NXP application note AN2805 for the recommended PCI-X layout topology.
Do not substitute the MPC8555PXALF with parts from other PowerQUICC III speed grades (e.g. 833 MHz variants) without re-validating thermal and power designs. The NRND status means NXP last-time-buy windows may apply; engage NXP support early for production schedules exceeding 2 years.
Compliance Information
RoHS and REACH status not specified in verified data. AEC-Q100 not applicable (industrial/communications processor, not automotive-grade). The "LF" suffix in the MPN typically denotes lead-free assembly per NXP conventions, but confirm from the manufacturer declaration before use in RoHS-restricted markets.
