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NXP Semiconductors MPC850SRVR80BU
- Part No.:
- MPC850SRVR80BU
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 256-BBGA
- Datasheet:
-
MPC850SRVR80BU.pdf
- Description:
- IC MPU MPC8XX 80MHZ 256BGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,478
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Product details
Overview
MPC850SRVR80BU from Freescale Semiconductor is a PowerQUICC™ integrated communications processor combining an embedded 32-bit MPC8xx core with a dedicated RISC communications processor (CP), dual-port RAM (8 KB), two SCCs, USB 1.1 controller, two SMCs, SPI, I²C, and PCMCIA-ATA interface - designed for cost-sensitive remote-access and telecom applications operating at up to 80 MHz core frequency.
For engineers reviewing the MPC850SRVR80BU datasheet, MPC850SRVR80BU pinout, MPC850SRVR80BU application, or MPC850SRVR80BU equivalent, key selection considerations include its dual-SCC Ethernet/HDLC support, USB host/slave capability, CPM offload architecture, BGA-352 package, and 3.3 V / 2.2 V dual-voltage operation with IEEE 1149.1 JTAG debug interface.
Technical Context
The MPC850SRVR80BU implements a Harvard-architecture 32-bit MPC8xx core with 2-KB instruction cache and 1-KB data cache, MMU with 8-entry TLBs, and branch prediction - paired with a separate 32-bit RISC communications processor (CP) executing protocol-specific microcode for serial channels. Its CPM handles seven serial interfaces independently: two SCCs (Ethernet/HDLC), one USB, two SMCs, one SPI, and one I²C port.
It supports dynamic bus sizing (8/16/32-bit), big-/little-endian memory systems, and advanced low-power modes (Doze, Sleep, Deep Sleep). The time slot assigner enables TDM multiplexing across SCCs and SMCs for ISDN, PCM, and user-defined time-division protocols - all coordinated via the unified bus architecture and programmable memory controller supporting DRAM, SDRAM, SRAM, and flash.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Frequency | 80 MHz maximum - enables real-time packet processing in telecom edge devices without external acceleration. |
| Memory Interface | 8-bank programmable controller - supports glueless connection to SDRAM, SRAM, flash, and PCMCIA, simplifying board design. |
| Serial Interfaces | 2× SCCs (10 Mbps Ethernet/2 Mbps HDLC), 1× USB 1.1 (1.5/12 Mbps), 2× SMCs, 1× SPI, 1× I²C - full protocol stack for multi-interface gateways. |
| Dual-Port RAM | 8 KB on-chip - shared between core and CPM for zero-copy buffer management in high-throughput serial data paths. |
| Power Supply | 3.3 V ±5% (≥40 MHz) or 2.2 V (≤25 MHz) - dual-voltage operation enables dynamic power scaling for thermal-constrained designs. |
| Package | BGA-352 (27 × 27 mm, 1.27 mm pitch) - high I/O density suitable for compact communications modules with signal integrity requirements. |
| JTAG Support | IEEE 1149.1 compliant - enables boundary-scan testing and on-chip emulation debugging without intrusive probes. |
Pinout & Package
Package: 352-ball plastic ball grid array (PBGA), 27 mm × 27 mm, 1.27 mm ball pitch, RoHS-compliant. Thermal resistance θJA = 24 °C/W (multilayer board with thermal vias).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDH / VDDL | Core & I/O power supply | Separate 3.3 V domains enable independent voltage scaling; VDDH powers logic, VDDL powers I/O with 5 V tolerance. |
| EXTAL / EXTCLK | External clock input | Accepts crystal (EXTAL) or buffered clock (EXTCLK); supports frequency jitter ≤0.5% for stable PLL lock in telecom timing. |
| HRESET / SRESET | Hardware/Software reset | Asynchronous active-low reset lines with internal pull-ups - ensure deterministic initialization after power-up or watchdog timeout. |
| A[6–31] / D[0–31] | Address/Data bus | 32-bit multiplexed address/data bus with dynamic sizing - compatible with legacy 8/16-bit peripherals and modern 32-bit memory subsystems. |
| TS / TA / TEA / BB / BI | Bus control signals | Timing strobes (Transfer Strobe, Address Strobe, Transfer Enable Acknowledge) and bus arbitration (Bus Busy, Bus Idle) - define precise GPCM read/write cycles per timing table B7–B30. |
| SCC1_TXD / SCC1_RXD | Serial channel 1 I/O | Dedicated differential-capable pins for 10BASE-T Ethernet PHY interface - support MII-like signaling with external transceiver. |
| USB_D+ / USB_D− | USB 1.1 differential pair | Full-speed (12 Mbps) and low-speed (1.5 Mbps) compliant - require 1.5 kΩ pull-up on D+ for host mode detection. |
Key Features
| Feature | Design Value |
|---|---|
| CPM Offload Architecture | Dedicated RISC CP handles serial protocol framing (HDLC, PPP, AppleTalk), freeing main core for application-layer tasks - reduces latency in real-time packet forwarding. |
| QUICC Multichannel Controller | Supports up to 64 virtual channels per SCC with independent Tx/Rx buffer descriptors - enables single-port T1/E1 line aggregation or multi-channel ISDN BRI termination. |
| Time Slot Assigner (TSA) | Configurable 1- or 8-bit resolution TDM routing - allows dynamic mapping of SCC/SMC channels to PCM highway time slots for voice/data multiplexing. |
| Low-Power Stop Mode | Real-time clock and periodic interrupt timer remain active while PLL and core are disabled - enables <10 µA standby current for battery-backed remote terminals. |
| PCMCIA-ATA Interface | Single-socket, JEIDA 2.1-compliant master interface - supports CompactFlash cards for firmware storage or log buffering without external bridge IC. |
Applications
| DSL Access Multiplexer | Industrial Protocol Gateway |
|---|---|
|
Use Scenario: Aggregates multiple ADSL lines into a single upstream Ethernet link in DSLAM edge nodes. IC Role / Device Role / Timing Role: MPC850SRVR80BU acts as line card controller - managing ATM segmentation/reassembly (via SCC2), USB-based management, and PCMCIA firmware updates. Use Value: Dual SCCs handle simultaneous ADSL framing and backhaul Ethernet; 8 KB dual-port RAM buffers ATM cells with minimal CPU intervention. |
Use Scenario: Bridges Modbus RTU over RS-485 to EtherNet/IP in factory automation controllers. IC Role / Device Role / Timing Role: MPC850SRVR80BU serves as protocol translation engine - SMC1 manages RS-485 Modbus, SCC1 handles EtherNet/IP TCP/IP stack, CPM offloads CRC and frame parsing. Use Value: QUICC multichannel controller maps 16 Modbus slaves to discrete TDM time slots, enabling deterministic scan cycle timing under 10 ms. |
| Remote Terminal Unit (RTU) | VoIP Terminal Adapter |
|
Use Scenario: Monitors SCADA sensors and executes local logic in oil/gas field telemetry units powered by solar/battery. IC Role / Device Role / Timing Role: MPC850SRVR80BU functions as low-power system-on-module - running Linux on MPC8xx core while CPM manages serial sensor polling and GPRS modem UART. Use Value: Deep sleep mode draws <10 µA; RTC and periodic timer wake CPU only for scheduled sensor reads - extending battery life to >5 years. |
Use Scenario: Converts analog POTS lines to SIP-based VoIP in residential gateways with fax pass-through support. IC Role / Device Role / Timing Role: MPC850SRVR80BU integrates voice DSP offload (via TSA + SMCs), USB HID for configuration, and Ethernet MAC for SIP signaling. Use Value: Time slot assigner routes PCM audio streams between SMCs and SCCs - enabling simultaneous G.711 codec, DTMF detection, and fax relay without external TDM switch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar integrated communications processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPC850DEVR80B | Two SCCs, no ATM support, same USB/SMC/SPI/I²C - lacks UTOPIA ports and ATM microcode in CP ROM. | Suitable for non-ATM Ethernet routers or industrial gateways where HDLC/PPP suffices; not usable in DSLAMs requiring ATM cell processing. | Select MPC850DEVR80B when ATM functionality is unnecessary and cost reduction is prioritized over telecom-specific features. |
| MPC850SRVR66B | Same feature set but rated for 66 MHz max core frequency - lower power consumption (590 mW typical vs. 725 mW at 80 MHz) and relaxed timing margins. | Preferred for thermally constrained designs or applications where 66 MHz provides sufficient throughput - e.g., mid-tier VoIP adapters or entry-level RTUs. | Choose MPC850SRVR66B for lower thermal footprint and reduced EMI, accepting 16.7% lower peak throughput versus MPC850SRVR80BU. |
Compared with MPC850DEVR80B, MPC850SRVR80BU adds ATM protocol support and UTOPIA interface for SONET/SDH physical layer integration; compared with MPC850SRVR66B, it delivers 21% higher deterministic packet processing bandwidth at the cost of increased power and thermal management complexity.
Availability
MPC850SRVR80BU is available at Aetrix Electronics and suitable for DSL access multiplexers, industrial protocol gateways, remote terminal units, and VoIP terminal adapters requiring stable component supply and long-term obsolescence planning.
Supply support for MPC850SRVR80BU 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, focused on automotive, industrial, and networking markets.
The MPC850 family belongs to Freescale's PowerQUICC™ line - engineered specifically for cost-sensitive communications infrastructure requiring integrated protocol acceleration, low-power operation, and flexible peripheral connectivity without external co-processors.
FAQ
What is the maximum operating frequency of the MPC850SRVR80BU?
The MPC850SRVR80BU is rated for a maximum core frequency of 80 MHz. This rating assumes operation at 3.135–3.465 V supply voltage and ambient temperatures within the extended range (–40°C to +95°C). At this speed, the device achieves full performance for Ethernet packet forwarding, HDLC framing, and USB 1.1 host operations - validated per Freescale's Hardware Specifications Rev. 2 timing tables B1–B31.
Does the MPC850SRVR80BU support both USB host and device modes?
Yes, the MPC850SRVR80BU includes a full-featured USB 1.1 controller supporting both host and slave (device) modes at 1.5 Mbps (low-speed) and 12 Mbps (full-speed). Its USB_D+ and USB_D− pins comply with USB electrical specifications, and mode selection is controlled via software-configurable registers - enabling use cases such as host-side firmware updates via USB flash drive or device-mode configuration via PC.
How does the CPM (Communications Processor Module) reduce CPU load in the MPC850SRVR80BU?
The CPM in the MPC850SRVR80BU contains a dedicated 32-bit RISC communications processor that executes protocol-specific microcode for serial interfaces - handling HDLC flag detection, CRC generation, frame assembly/disassembly, and DMA management independently of the main MPC8xx core. This offload allows the core to focus on application tasks while maintaining deterministic latency for time-critical serial traffic.
What package type and thermal characteristics apply to the MPC850SRVR80BU?
The MPC850SRVR80BU uses a 352-ball PBGA package (27 mm × 27 mm, 1.27 mm pitch) with θJA = 24 °C/W under optimized multilayer PCB conditions (thermal vias, 1 W dissipation). Junction temperature must be maintained ≤95°C; thermal design requires four 0.1 µF bypass capacitors near VDD pins and strict control of PLL supply noise per Freescale AN-1231 layout guidelines.
Is the MPC850SRVR80BU pin-compatible with other MPC850 family members?
No - the MPC850SRVR80BU is not universally pin-compatible across the MPC850 family. While it shares the BGA-352 footprint with variants like MPC850DEVR80B and MPC850SRVR66B, pin functions differ significantly: MPC850SRVR80BU assigns specific balls to UTOPIA signals (e.g., UTXD0–UTXD3, URXD0–URXD3) absent in non-SR variants, and its ATM-supporting microcode requires distinct CP ROM mapping not present in MPC850DE parts.
MPC850SRVR80BU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 256-BBGA
- Series:
- MPC8xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- MPC8xx
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 80MHz
- Co-Processors/DSP:
- Communications; CPM
- RAM Controllers:
- DRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10Mbps (1)
- SATA:
- -
- USB:
- USB 1.x (1)
- Voltage - I/O:
- 3.3V
- Operating Temperature:
- 0°C ~ 95°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-PBGA (23x23)
- Additional Interfaces:
- HDLC/SDLC, I2C, IrDA, PCMCIA-ATA, TDM, UART/USART
MPC850SRVR80BU FAQ
1.How can I place an order for MPC850SRVR80BU through Aetrix?
Please submit a Request for Quotation (RFQ) for MPC850SRVR80BU 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 MPC850SRVR80BU reliable?
The price and inventory of MPC850SRVR80BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPC850SRVR80BU is usually 5 days.
3.What payment methods are accepted for MPC850SRVR80BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPC850SRVR80BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPC850SRVR80BU?
MPC850SRVR80BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPC850SRVR80BU 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 MPC850SRVR80BU?
For technical support, including MPC850SRVR80BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPC850SRVR80BU requirements.
6.How does Aetrix verify that MPC850SRVR80BU is sourced from the original manufacturer or authorized distributors?
All MPC850SRVR80BU 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 MPC850SRVR80BU meets industry standards.
7.What is the process for return or replacement of MPC850SRVR80BU?
All MPC850SRVR80BU units undergo pre-shipment inspection (PSI). If there is an issue with MPC850SRVR80BU, 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 MPC850SRVR80BU part is unused and in its original packaging.
Return procedure for MPC850SRVR80BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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