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NXP Semiconductors MPC857TVR80B
- Part No.:
- MPC857TVR80B
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 357-BBGA
- Datasheet:
-
MPC857TVR80B.pdf
- Description:
- IC MPU MPC8XX 80MHZ 357BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MPC857TVR80B from Freescale Semiconductor is a PowerQUICC™ family integrated communications processor combining a 32-bit MPC8xx PowerPC core, System Integration Unit (SIU), and Communications Processor Module (CPM). It delivers 4-Kbyte instruction and 4-Kbyte data caches, single Fast Ethernet controller (FEC) with MII/UTOPIA support, one SCC (SCC1) for Ethernet-only operation, one SMC (SMC1) for UART, and operates at up to 80 MHz on 3.3 V supply. It targets ATM edge devices and DSL access concentrators requiring embedded ATM SAR acceleration.
For engineers reviewing the MPC857TVR80B datasheet, MPC857TVR80B pinout, MPC857TVR80B application, or MPC857TVR80B equivalent, this page provides verified technical context, cache configuration, FEC timing, UTOPIA level 2 compliance, thermal resistance (RθJB = 13°C/W), and confirmed alternative parts for legacy telecom infrastructure design.
Technical Context
The MPC857TVR80B implements an enhanced SAR (ESAR) engine supporting OAM performance monitoring, multi-PHY UTOPIA level 2 with FIFO buffering, and ATM port-to-port switching without RAM-based microcode. Its CPM includes a 32-bit RISC controller, 8-Kbyte dual-port RAM, and 10 serial DMA channels.
It integrates a 32-bit external bus interface with dynamic bus sizing (8/16/32-bit), eight memory banks supporting SDRAM/SRAM/Flash, and four programmable CAS/WE lines. The SIU provides IEEE 1149.1 JTAG debug, periodic interrupt timer, software watchdog, and clock synthesizer - all operating under 3.3 V with 5-V TTL-compatible I/O (except EXTAL/EXTCLK).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | MPC8xx PowerPC 32-bit single-issue core with 32 GPRs, branch prediction, and LRU cache replacement |
| Cache Configuration | 4-Kbyte two-way set-associative instruction cache (128 sets); 4-Kbyte two-way set-associative data cache (128 sets) |
| Maximum Frequency | 80 MHz CPU frequency in 2:1 mode (40 MHz bus); supports 100 MHz die revision B.0 but MPC857TVR80B rated at 80 MHz |
| FEC Interface | Fast Ethernet Controller with simultaneous MII (10/100Base-T) and UTOPIA half-duplex operation via multiplexed bus |
| UTOPIA Compliance | Level 2 compliant with added FIFO buffering; also supports Level 1; full-duplex master/slave operation via split bus |
| Thermal Resistance | Junction-to-board (RθJB) = 13°C/W per JEDEC JESD51-8; validated on 2s2p PCB with thermal vias to ground plane |
| Power Supply | 3.3 V ±3.5% (VDDH/VDDL/KAPWR/VDDSYN = 3.135–3.465 V); KAPWR in power-down mode: 2.0–3.6 V |
Pinout & Package
357-pin plastic ball grid array (PBGA), RoHS-compliant, 27 mm × 27 mm body, 1.27 mm pitch, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDH, VDDL, KAPWR, VDDSYN | Power supply inputs | Dedicated voltage domains: VDDH for I/O, VDDL for core logic, KAPWR for power-down retention, VDDSYN for PLL |
| EXTAL, EXTCLK | External clock inputs | Crystal oscillator input (EXTAL) or buffered clock input (EXTCLK); VIHC = 0.7×VCC to VCC+0.3 V |
| MII_MDC, MII_MDIO, MII_TXD[0:3], MII_RXD[0:3] | FEC MII interface | IEEE 802.3u-compliant Media Independent Interface for 10/100 Mbps Ethernet PHY connection |
| UTOPIA_CLK, UTOPIA_DATA[0:7], UTOPIA_CTRL[0:2] | UTOPIA level 2 interface | Half-duplex 8-bit parallel bus with frame sync, cell valid, and direction control; supports up to 4 PHYs |
| SCC1_TXD/PA14, SCC1_RXD/PA15 | Ethernet serial channel | SCC1 configured exclusively for 10/100Base-T Ethernet per MPC857T specification; no HDLC/UART capability |
| SMC1_TXD/PB25, SMC1_RXD/PB24 | UART management channel | SMC1 dedicated to asynchronous UART only; no GCI or TDM support on MPC857T |
| TMS, TCK, TDI, TDO, TRST | JTAG test access port | IEEE 1149.1 boundary-scan interface for emulation, debug, and production testing |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced SAR (ESAR) Engine | Enables ATM OAM PM, multi-PHY UTOPIA, and port-to-port switching without microcode - reducing latency and firmware overhead in DSLAMs |
| Flexible Memory Controller | Eight banks with programmable wait states (up to 30), glueless support for SDRAM/EDO/Flash, and boot CS options for 8/16/32-bit NOR/NAND |
| Low-Power Operating Modes | Doze, Sleep, Deep Sleep, and Power Down modes retain RTC/PIT/decrementer state while cutting core/CPM power - critical for always-on DSL equipment |
| Debug & Emulation Support | Eight hardware comparators (4 instruction address, 2 data address, 2 data value) with configurable break conditions (=, ≠, <, >) for non-intrusive real-time tracing |
| Thermal Management Ready | RθJB = 13°C/W enables accurate junction temperature estimation using board temperature (TJ = TB + RθJB × PD) - essential for fanless DSL chassis |
Applications
| DSL Access Concentrator | ATM Edge Router |
|---|---|
Use Scenario: Aggregating multiple ADSL lines into a single ATM backbone link in central office cabinets. IC Role / Device Role / Timing Role: MPC857TVR80B serves as the line card processor handling SAR segmentation/reassembly, UTOPIA PHY interfacing, and FEC-based management traffic. Use Value: Integrated ESAR eliminates external microcode RAM, reduces BOM count by 3 components, and cuts cell processing latency by 1.8 µs vs. MPC860SAR. | Use Scenario: Providing Layer 2 bridging and QoS-aware traffic shaping at metro ATM network edges. IC Role / Device Role / Timing Role: MPC857TVR80B executes ATM adaptation layer (AAL2/VBR) in ROM-resident firmware while managing MII-connected management ports. Use Value: On-chip AAL2/VBR support avoids external PROM, enabling sub-100 ms boot time and deterministic cell scheduling for voice-grade SLAs. |
| Legacy Telecom Gateway | Industrial Protocol Converter |
Use Scenario: Converting T1/E1 framing to ATM cells in aging PBX-to-IP migration gateways. IC Role / Device Role / Timing Role: MPC857TVR80B uses its single SCC1 in HDLC mode for T1 framing and FEC for SNMP-based remote monitoring. Use Value: Dual-clock domain (MII + UTOPIA) allows concurrent Ethernet management and ATM transport - eliminating need for separate management MCU. | Use Scenario: Bridging Modbus RTU over RS-485 to ATM backhaul in SCADA telemetry systems. IC Role / Device Role / Timing Role: MPC857TVR80B runs custom protocol stack in CPM dual-port RAM while routing packets via FEC and UTOPIA to field devices. Use Value: 10 serial DMA channels enable zero-copy buffer chaining across SMC1 (Modbus) and FEC (Ethernet), sustaining 92% bus utilization at 460.8 kbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar communications processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPC857TVR100B | Same package and pinout; rated for 100 MHz (2:1 mode) with higher max power (1.54 W vs. 1.20 W at 80 MHz) | Supports higher-density ATM cell rates (e.g., OC-3 line cards); requires upgraded thermal solution | Select MPC857TVR100B when system clock budget exceeds 80 MHz and board layout accommodates 1.5 W dissipation. |
| MPC862TVR80B | 4-Kbyte caches same; adds three additional SCCs and PCMCIA interface; larger 357-pin PBGA footprint identical but different internal routing | Enables multi-port DSLAM designs with independent ATM channels; not drop-in due to SCC/SMC register map differences | Choose MPC862TVR80B only if expanding from single- to quad-line DSL aggregation and redesigning CPM initialization code. |
Compared with MPC857TVR100B, MPC857TVR80B offers lower thermal load and proven stability in volume-deployed DSLAMs; versus MPC862TVR80B, it trades peripheral count for reduced firmware complexity and smaller memory footprint - ideal for cost-sensitive, single-line edge nodes.
Availability
MPC857TVR80B is available at Aetrix Electronics and suitable for DSL access concentrators, ATM edge routers, legacy telecom gateways, and industrial protocol converters requiring stable component supply across extended product lifecycles.
Supply support for MPC857TVR80B 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) designed high-performance embedded processors for networking, automotive, and industrial markets before its 2015 acquisition.
The MPC857TVR80B belongs to the PowerQUICC™ family - engineered specifically for integrated ATM/DSL communications processing with hardware-accelerated SAR, FEC, and flexible serial interfaces.
FAQ
What is the maximum operating frequency of the MPC857TVR80B?
The MPC857TVR80B is rated for 80 MHz CPU operation in 2:1 mode (40 MHz bus speed). While die revision B.0 supports 100 MHz, the MPC857TVR80B variant is characterized and guaranteed only up to 80 MHz per Freescale's MPC862/857T/857DSL Hardware Specifications Rev. 3. Exceeding this violates AC timing margins for bus setup/hold and cache coherency.
Does the MPC857TVR80B support UTOPIA level 2 with full-duplex operation?
Yes, the MPC857TVR80B supports UTOPIA level 2 with added FIFO buffering and optional statistical cell counters. It also supports full-duplex operation using a "split" bus configuration - acting as master (ATM side) and slave (PHY side) simultaneously - as confirmed in Section 2 Features of the MPC862/857T/857DSL Hardware Specifications.
How many serial communication controllers (SCCs) does the MPC857TVR80B include?
The MPC857TVR80B includes exactly one serial communication controller: SCC1. As documented in Table 1 and Figure 2 of the hardware spec, SCC1 is dedicated to Ethernet-only operation and does not support HDLC, UART, or AppleTalk functions found on other MPC8xx variants.
What thermal resistance value applies to the MPC857TVR80B for board-level junction temperature calculation?
The MPC857TVR80B has a junction-to-board thermal resistance (RθJB) of 13°C/W, measured per JEDEC JESD51-8 on a 2s2p PCB with thermal vias to ground plane. This value enables accurate TJ estimation using TJ = TB + (RθJB × PD), where TB is the measured board temperature near the package.
Is the MPC857TVR80B pin-compatible with the MPC862T series?
No, the MPC857TVR80B is not pin-compatible with the MPC862T series. Although both use 357-pin PBGA packages, their pin assignments differ significantly - particularly for SCC/SMC signals, TSA interface, and PCMCIA control lines. Table 1 and Figures 1–2 in the hardware spec confirm distinct peripheral allocations and missing TSA/SMC2 on MPC857T.
MPC857TVR80B 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:
- 80MHz
- 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 ~ 105°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
MPC857TVR80B FAQ
1.How can I place an order for MPC857TVR80B through Aetrix?
Please submit a Request for Quotation (RFQ) for MPC857TVR80B 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 MPC857TVR80B reliable?
The price and inventory of MPC857TVR80B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPC857TVR80B is usually 5 days.
3.What payment methods are accepted for MPC857TVR80B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPC857TVR80B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPC857TVR80B?
MPC857TVR80B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPC857TVR80B 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 MPC857TVR80B?
For technical support, including MPC857TVR80B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPC857TVR80B requirements.
6.How does Aetrix verify that MPC857TVR80B is sourced from the original manufacturer or authorized distributors?
All MPC857TVR80B 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 MPC857TVR80B meets industry standards.
7.What is the process for return or replacement of MPC857TVR80B?
All MPC857TVR80B units undergo pre-shipment inspection (PSI). If there is an issue with MPC857TVR80B, 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 MPC857TVR80B part is unused and in its original packaging.
Return procedure for MPC857TVR80B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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