My Inquiry
My Account
NXP Semiconductors MPC855TVR66D4
- Part No.:
- MPC855TVR66D4
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 357-BBGA
- Datasheet:
-
MPC855TVR66D4.pdf
- Description:
- IC MPU MPC8XX 66MHZ 357BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,044
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPC855TVR66D4 from Freescale Semiconductor is a 32-bit PowerPC-based communications controller integrating an MPC8xx core (106 MIPS @ 80 MHz), a RISC communications processor module (CPM), and a dedicated 10/100-Mbps Fast Ethernet controller (FEC) with bursting DMA and on-chip FIFOs. It targets cost-sensitive SOHO routers, ADSL/cable modems, and telecom edge devices requiring concurrent ATM, HDLC, and Ethernet protocol processing.
For engineers reviewing the MPC855TVR66D4 datasheet, MPC855TVR66D4 pinout, MPC855TVR66D4 application, or MPC855TVR66D4 equivalent, this device offers verified IEEE 802.3u-compliant MAC, UTOPIA-level-1 ATM support up to 70 Mbps, QMC multichannel HDLC for 32 TDM channels, 8-KByte dual-port RAM, and 357-pin BGA packaging - all in a single-chip solution optimized for embedded networking control.
Technical Context
The MPC855TVR66D4 implements a dual-processor architecture: the embedded MPC8xx core handles general-purpose application tasks using Dhrystone-optimized 4-KByte instruction/data caches and MMU with 32-entry TLBs, while the CPM executes microcoded communications protocols independently. Its FEC operates autonomously via bursting DMA, isolating Ethernet traffic from CPM latency.
ATM processing occurs entirely within the CPM using ROM-resident microcode supporting AAL0/AAL5, UTOPIA or serial (T1/E1/ADSL) physical interfaces, and APC scheduler for CBR/UBR traffic shaping. The QMC protocol enables one SCC to emulate 32 independent HDLC/transparent channels mapped across arbitrary TDM time slots - confirmed at 50 MHz operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 32-bit PowerPC MPC8xx core, fully compatible with PowerPC user ISA; delivers 106 MIPS @ 80 MHz (Dhrystone 2.1, 94% cache hit) |
| FEC Speed & Compliance | IEEE 802.3u-compliant 10/100-Mbps MAC; full-duplex 100-Mbps supported ≥50 MHz system clock; half-duplex 100-Mbps ≥33 MHz |
| ATM Throughput | Up to 70 Mbps cell processing (receive-priority arbitration); supports AAL0/AAL5, UTOPIA Level 1 master, and serial-mode TC functions for T1/E1/ADSL |
| QMC Channel Capacity | 32 time-division-multiplexed channels over single SCC; independent Tx/Rx buffer descriptors and interrupt reporting per channel |
| Memory Interface | 32-bit dynamic bus sizing (8/16/32-bit); eight memory banks; DRAM/SRAM/Flash glueless support; 0–15 wait states per bank; 32 Kbyte–256 Mbyte block sizes |
| Power Modes | Full-on, doze, sleep, deep sleep, and low-power STOP modes; RTC and PIT remain active in deepest modes for wake-up timing |
| I/O Voltage | 3.3-V only operation; no 5-V I/O tolerance - requires level-shifting for legacy peripherals |
Pinout & Package
Package: 357-ball BGA (0.8 mm pitch), RoHS-compliant, thermal pad exposed on underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | System Clock Input | Accepts external crystal or oscillator (10–80 MHz); feeds PLL for internal core/CPM/FEC clocks |
| RESET_IN | Asynchronous Reset Input | Active-low signal initiating hardware reset sequence; asserts internal logic, clears caches, resets CPM state machine |
| MDIO / MDC | Management Data I/O Interface | IEEE 802.3u-compliant two-wire interface for PHY register read/write; enables auto-negotiation and link status monitoring |
| TXD[3:0] / RXD[3:0] | MII Data Bus | 4-bit nibble-wide data path for 100-Mbps MII; supports both 10-Mbps and 100-Mbps operation with shared clock domain |
| UTXCLK / URXCLK | UTOPIA Clock Signals | Cell-synchronized clocks for UTOPIA Level 1 interface; derived from system clock at 1:2 or 1:3 ratio per specification |
| SCC1_Tx / SCC1_Rx | Serial Communications Controller 1 | Dedicated HDLC/UART/transparent mode pins; support QMC multichannel mapping when configured as TDM interface |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FEC with Bursting DMA | Reduces system bus utilization by >40% vs. non-bursting DMA; enables use of low-cost SDRAM without bandwidth starvation |
| 8-KByte Dual-Port RAM | Dedicated CPM-accessible memory for buffer descriptors and protocol state tables; eliminates contention with core memory accesses |
| QMC Multichannel Protocol | Enables single SCC to process 32 independent HDLC or transparent TDM channels - eliminating need for multiple discrete controllers |
| ATM Microcode Engine | ROM-resident CPM firmware delivering full UNI 4.0 compliance, AAL5 SAR, and APC scheduling without host CPU intervention |
| Glueless Memory Interface | Direct connection to DRAM SIMMs, Flash EPROM, SRAM, and PCMCIA sockets - reduces BOM count and layout complexity |
Applications
| SOHO Router Control Plane | ADSL Modem Protocol Stack |
|---|---|
Use Scenario: Embedded routing engine managing NAT, firewall, and QoS policies in residential gateways. IC Role / Device Role / Timing Role: MPC855TVR66D4 serves as primary control processor executing Linux-based network stack while offloading ATM/HDLC framing to CPM. Use Value: Concurrent FEC + CPM operation enables simultaneous WAN (ADSL/ATM) and LAN (10/100-Mbps Ethernet) traffic handling without performance degradation. |
Use Scenario: Line termination unit in DSLAM edge equipment performing ATM cell segmentation/reassembly and physical layer framing. IC Role / Device Role / Timing Role: MPC855TVR66D4 acts as protocol accelerator - its CPM executes AAL5 SAR and TC functions while core manages OAM signaling. Use Value: On-chip UTOPIA interface and 70 Mbps ATM throughput eliminate external SAR chip, reducing latency and component count. |
| TDM-Based PBX Interface | Industrial Ethernet Gateway |
Use Scenario: Time-division multiplexed voice/data aggregation in small business PBX systems with E1/T1 backhaul. IC Role / Device Role / Timing Role: MPC855TVR66D4 functions as TDM switch controller - QMC maps 32 voice channels to SCC and routes them via TSA to SMCs or FEC. Use Value: Arbitrary time-slot assignment and independent per-channel HDLC/transparent mode allow mixed voice/data service provisioning on same hardware. |
Use Scenario: Protocol translation bridge connecting legacy RS-485 fieldbus networks to industrial Ethernet (Modbus TCP/IP). IC Role / Device Role / Timing Role: MPC855TVR66D4 operates as dual-interface gateway - SMC1 handles serial fieldbus while FEC manages real-time Ethernet packets. Use Value: Integrated PCMCIA interface supports removable configuration cards; low-power STOP mode enables energy-efficient remote monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar communications controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPC860TVR66D4 | Higher CPM clock (66 MHz vs. 50 MHz), larger 16-KByte dual-port RAM, additional SCC and SMC channels | Better suited for high-throughput ATM switching or multi-protocol base stations requiring >32 TDM channels | Select MPC860TVR66D4 only if QMC channel count, ATM throughput, or CPM RAM exceeds MPC855TVR66D4 capabilities |
| MPC8555EVRAGDB | Enhanced version with integrated DDR2 memory controller, PCI interface, and higher core frequency (up to 533 MHz) | Targets next-gen broadband gateways needing PCI expansion, DDR2 bandwidth, or Linux real-time performance beyond MPC855TVR66D4 limits | MPC8555EVRAGDB requires PCB redesign due to different package (672-pin PBGA) and voltage rails; not drop-in compatible |
Compared with MPC860TVR66D4 and MPC8555EVRAGDB, the MPC855TVR66D4 provides optimal cost/performance balance for entry-level SOHO and DSL modem designs where 32-channel QMC, 70 Mbps ATM, and 10/100-Mbps FEC meet functional requirements without over-engineering.
Availability
MPC855TVR66D4 is available at Aetrix Electronics and suitable for SOHO router manufacturing, ADSL modem production, and industrial TDM gateway development requiring stable component supply and long-term lifecycle assurance.
Supply support for MPC855TVR66D4 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) is a fabless semiconductor company specializing in embedded processors and connectivity solutions for automotive, industrial, and networking markets.
The MPC855TVR66D4 belongs to the MPC8xx family of integrated communications controllers designed specifically for cost-sensitive, low-power networking edge devices requiring concurrent protocol acceleration and deterministic real-time response.
FAQ
What is the maximum ATM throughput supported by the MPC855TVR66D4?
The MPC855TVR66D4 supports up to 70 Mbps ATM cell processing under receive-priority arbitration, verified at 50 MHz system clock operation. This throughput applies to AAL5 SAR and UTOPIA Level 1 interfaces; serial-mode ATM (T1/E1/ADSL) achieves lower rates depending on physical layer framing overhead. The MPC855TVR66D4 datasheet confirms this value in Section 1.3, "ATM Support".
Does the MPC855TVR66D4 support 100-Mbps full-duplex Ethernet operation?
Yes, the MPC855TVR66D4 supports full-duplex 100-Mbps Ethernet operation when the system clock is 50 MHz or higher, as specified in the MPC855TVR66D4 Technical Summary (Rev. 0.1, p.2). It complies fully with IEEE 802.3u and supports MII, 10-Mbps MII, and 7-wire physical interfaces - but full-duplex 100-Mbps requires ≥50 MHz clocking.
How many TDM channels does the QMC protocol support on the MPC855TVR66D4?
The QMC multichannel protocol on the MPC855TVR66D4 supports exactly 32 time-division-multiplexed channels over a single SCC, with arbitrary mapping of channels to TDM time slots and independent HDLC or transparent mode per channel. This capability is explicitly documented in Section 1.2.4.1 and confirmed for 50 MHz operation in the MPC855TVR66D4 datasheet.
Is the MPC855TVR66D4 pin-compatible with other MPC8xx family members?
No, the MPC855TVR66D4 uses a unique 357-ball BGA package and is not pin-compatible with MPC860 or MPC855 variants in different packages (e.g., 352-pin PQFP). Pin assignments for FEC, UTOPIA, and QMC-specific signals differ significantly; migration requires PCB redesign and firmware adaptation for CPM microcode initialization.
What power management modes are available on the MPC855TVR66D4?
The MPC855TVR66D4 supports five power modes: full-on, doze, sleep, deep sleep, and low-power STOP. In STOP mode, only RTC and PIT remain active - enabling ultra-low quiescent current for battery-backed applications. All modes are controlled via SIU registers and require no external circuitry, as detailed in Section 1.4 of the MPC855TVR66D4 Technical Summary.
MPC855TVR66D4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 357-BBGA
- Series:
- MPC8xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- MPC8xx
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 66MHz
- Co-Processors/DSP:
- Communications; CPM
- RAM Controllers:
- DRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10Mbps (1), 10/100Mbps (1)
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 3.3V
- Operating Temperature:
- 0°C ~ 95°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 357-PBGA (25x25)
- Additional Interfaces:
- HDLC/SDLC, I2C, IrDA, PCMCIA, SPI, TDM, UART/USART
MPC855TVR66D4 FAQ
1.How can I place an order for MPC855TVR66D4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPC855TVR66D4 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 MPC855TVR66D4 reliable?
The price and inventory of MPC855TVR66D4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPC855TVR66D4 is usually 5 days.
3.What payment methods are accepted for MPC855TVR66D4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPC855TVR66D4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPC855TVR66D4?
MPC855TVR66D4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPC855TVR66D4 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 MPC855TVR66D4?
For technical support, including MPC855TVR66D4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPC855TVR66D4 requirements.
6.How does Aetrix verify that MPC855TVR66D4 is sourced from the original manufacturer or authorized distributors?
All MPC855TVR66D4 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 MPC855TVR66D4 meets industry standards.
7.What is the process for return or replacement of MPC855TVR66D4?
All MPC855TVR66D4 units undergo pre-shipment inspection (PSI). If there is an issue with MPC855TVR66D4, 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 MPC855TVR66D4 part is unused and in its original packaging.
Return procedure for MPC855TVR66D4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPC855TVR66D4 Tags
-
AT91SAM9260B-CU-999
Microchip Technology
-
AT91SAM9G25-CU
Microchip Technology
-
ATSAMA5D27C-CU
Microchip Technology
-
AT91SAM9X35-CU
Microchip Technology
-
AT91SAM9X25-CU
Microchip Technology
-
MCIMX6Y2CVM08AB
NXP Semiconductors
.JPG)
-
AM3352BZCZ100
Texas Instruments
-
AT91SAM9260B-CU
Microchip Technology
-
AT91SAM9260B-QU
Microchip Technology
-
ATSAMA5D31A-CU
Microchip Technology
-
AT91SAM9G20B-CU-999
Microchip Technology
-
MCIMX6Y2CVM05AB
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
