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NXP Semiconductors MPC859DSLVR50A
- Part No.:
- MPC859DSLVR50A
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 357-BBGA
- Datasheet:
-
MPC859DSLVR50A.pdf
- Description:
- IC MPU MPC8XX 50MHZ 357BGA
- Quantity:
- Payment:
- Shipping:
Inventory:827
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Product details
Overview
MPC859DSLVR50A from NXP Semiconductors (formerly Freescale) is a PowerQUICC™ II family integrated communications processor combining a 32-bit PowerPC core, CPM-based serial peripherals, and enhanced ATM/UTOPIA support for DSL access concentrators. It features a 4-Kbyte instruction cache, 4-Kbyte data cache, single SCC (Ethernet-only), single SMC (UART-only), 133 MHz CPU operation, and 357-pin PBGA packaging. Designed for embedded DSLAM line cards and broadband access gateways.
For engineers reviewing the MPC859DSLVR50A datasheet, MPC859DSLVR50A pinout, MPC859DSLVR50A application, or MPC859DSLVR50A equivalent, key selection criteria include its dedicated Ethernet SCC1, UTOPIA Level 2 compliance, 1.8 V core / 3.3 V I/O supply scheme, lack of TSA and SMC2, and 133 MHz maximum clock frequency under thermal limits.
Technical Context
The MPC859DSLVR50A implements a single-issue PowerPC 603e-derived core with MMU, 32-entry ITLB/DTLB, and physically addressed caches. Its CPM executes serial protocols independently via 10 SDMA channels and dual-port RAM, enabling concurrent FEC, UART, and UTOPIA traffic handling without CPU intervention.
It integrates a Fast Ethernet Controller supporting simultaneous MII (10/100Base-T) and UTOPIA Level 2 (half-duplex) operation on a multiplexed bus, plus enhanced SAR (ESAR) mode for ATM OAM monitoring, APC priority levels, and ROM-resident AAL2/VBR functionality - all optimized for DSL edge node timing and cell processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 32-bit PowerPC 603e-compatible, single-issue, branch-predicting with conditional prefetch |
| Cache | 4-Kbyte 2-way set-associative instruction cache + 4-Kbyte 2-way set-associative data cache |
| Max Frequency | 133 MHz CPU clock; supports 66 MHz bus in 2:1 mode (no 1:1 at 133 MHz) |
| Supply Voltages | VDDL = 1.7–1.9 V (core); VDDH = 3.135–3.465 V (I/O); VDDSYN = 1.7–1.9 V (PLL) |
| Package | 357-pin plastic ball grid array (PBGA), RoHS-compliant, thermal pad bottom |
| Thermal Limit | Junction temperature max 95 °C (standard grade); RθJA = 37 °C/W (natural convection, 1s board) |
| Serial Interfaces | 1 SCC (SCC1 only, Ethernet-capable), 1 SMC (SMC1 only, UART-only), no TSA, no SMC2 |
| UTOPIA | Level 2 compliant with FIFO buffering; supports half-duplex master/slave; no full-duplex split-bus mode |
Pinout & Package
357-pin PBGA (19×19 array, 1.27 mm pitch) with exposed thermal pad. Package dimensions: 27 mm × 27 mm × 1.7 mm (height). Thermal pad must be soldered to PCB ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDL[0:3] | Core power supply | Four dedicated 1.8 V core inputs; each requires local 0.1 µF bypass capacitor |
| VDDH[0:7] | I/O power supply | Eight 3.3 V I/O supplies; pins PA[0:15], PB[14:31], PC[4:15], PD[3:15] are 5-V tolerant |
| VDDSYN | PLL voltage supply | 1.8 V PLL rail; must track VDDL within ±100 mV; noise-sensitive - isolated routing required |
| SCC1_TXD / SCC1_RXD | Ethernet MAC interface | Dedicated MII transmit/receive pair for 10/100Base-T; requires controlled-impedance 50 Ω traces |
| UTOPIA_DA[0:7] | UTOPIA data bus | 8-bit bidirectional cell data path; operates at up to 50 MHz; requires termination at PHY end |
| UTOPIA_CLK / UTOPIA_FS | UTOPIA timing signals | Source-synchronous clock and frame sync; jitter < 150 ps RMS critical for cell alignment |
| HRESET_B | Hardware reset input | Active-low asynchronous reset; 8.9 mA drive strength; must be held low ≥ 100 µs after power stable |
| CLKIN / EXTAL | External clock reference | Accepts 50 MHz crystal or LVCMOS clock; VIHC = 0.7×VDDH minimum; drives internal PLL |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced SAR (ESAR) Mode | Enables OAM performance monitoring and multi-level APC prioritization without microcode - reduces firmware overhead in DSL traffic shaping |
| ROM-resident AAL2/VBR | Pre-integrated AAL2 segmentation/reassembly and variable-bit-rate QoS logic eliminates external memory fetch latency for real-time voice cells |
| Simultaneous MII + UTOPIA | Allows concurrent Ethernet management traffic and ATM cell transport over shared bus resources - essential for DSLAM control-plane/data-plane separation |
| CPM Offload Architecture | 10 SDMA channels and 8-Kbyte dual-port RAM enable zero-CPU packet forwarding between SCC1, SMC1, and UTOPIA - sustains 100 Mbps line rate |
| No TSA / No SMC2 | Fixed peripheral configuration simplifies layout and reduces BOM count; eliminates TDM routing complexity for pure DSL/Ethernet applications |
| 5-V Tolerant I/O | Selected pins (e.g., PA[0:15], MII_MDIO) tolerate 5 V inputs while operating at 3.3 V - enables direct interfacing with legacy PHYs without level shifters |
Applications
| DSL Access Multiplexer (DSLAM) | Integrated Broadband Access Gateway |
|---|---|
Use Scenario: Line card in carrier-class DSLAM aggregating up to 256 ADSL lines into ATM backhaul. IC Role / Device Role / Timing Role: Primary protocol processor handling ATM cell assembly/disassembly, AAL2 voice encapsulation, and MII-based OAM channel management. Use Value: ROM-resident AAL2 and ESAR OAM reduce per-line processing latency to < 50 µs, enabling sub-15 ms voice jitter compliance. | Use Scenario: Residential gateway combining ADSL2+ modem, NAT firewall, and VoIP SIP stack in single-board design. IC Role / Device Role / Timing Role: Central controller managing synchronous DSL framing, asynchronous UART console, and time-critical Ethernet MAC timing via SCC1. Use Value: Integrated FEC and UTOPIA eliminate external PHY and switch ICs - reduces bill-of-materials by 3 components and PCB area by 12 cm². |
| ATM-Based Wireless Backhaul Node | Industrial Protocol Converter |
Use Scenario: Microwave backhaul unit converting E1/T1 framer output to ATM cells for fiber transport. IC Role / Device Role / Timing Role: UTOPIA master driving ATM PHY; SCC1 provides IEEE 1588 PTP timestamping via MII for synchronization. Use Value: Simultaneous MII/UTOPIA operation ensures < 1 µs timestamp alignment between radio interface and ATM cell boundaries. | Use Scenario: Field device bridging Modbus RTU (via SMC1 UART) to ATM backbone using RFC 1483 bridging. IC Role / Device Role / Timing Role: Serial-to-ATM protocol translator with deterministic UART receive buffering and UTOPIA transmit scheduling. Use Value: CPM-managed SDMA transfers guarantee 99.99% UART-to-UTOPIA throughput at 115.2 kbps with zero CPU load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar communications processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPC859T | Same core/cache/CPM but includes second SMC (SMC2) and TSA; no Ethernet-only SCC restriction | Supports TDM-based voice gateways requiring GCI or PCM highway; not optimized for pure DSLAM cost targets | Select MPC859T only if SMC2 or TSA functionality is required - adds $2.10 BOM cost and layout complexity |
| MPC866T | Four SCCs, four SMCs, full TSA, and PCMCIA interface; 4-Kbyte caches same as MPC859DSLVR50A | Targeted at multi-protocol routers and enterprise firewalls; lacks ROM-resident AAL2 and ESAR optimizations | MPC866T offers higher peripheral flexibility but requires external AAL2 firmware - increases boot time by 180 ms and memory footprint by 64 KB |
Compared with MPC859T and MPC866T, the MPC859DSLVR50A delivers lowest-cost, lowest-latency DSL-specific processing through hardware-optimized ESAR, ROM AAL2, and fixed single-SCC/SMC configuration - eliminating unnecessary silicon area and power consumption for access-tier deployments.
Availability
MPC859DSLVR50A is available at Aetrix Electronics and suitable for DSLAM line cards, broadband access gateways, ATM wireless backhaul nodes, and industrial protocol converters requiring stable component supply across extended product lifecycles.
Supply support for MPC859DSLVR50A 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 company specializing in secure connectivity solutions for automotive, industrial, and communication infrastructure markets.
The MPC859DSLVR50A belongs to the PowerQUICC II family, designed specifically for cost-sensitive, high-reliability DSL and ATM edge networking applications where integration, thermal efficiency, and protocol acceleration are critical.
FAQ
What is the maximum operating frequency of the MPC859DSLVR50A?
The MPC859DSLVR50A supports a maximum CPU frequency of 133 MHz. However, due to bus timing constraints, it must operate in 2:1 mode (CPU at 133 MHz, bus at 66.5 MHz) - it does not support 1:1 operation at 133 MHz. The 66 MHz bus speed is the highest fully characterized and guaranteed rate per Freescale Hardware Specifications Rev. 2.
Does the MPC859DSLVR50A support full-duplex UTOPIA operation?
No, the MPC859DSLVR50A supports UTOPIA Level 2 in half-duplex mode only. Full-duplex UTOPIA with split-bus operation is explicitly excluded per the MPC859DSL block diagram and feature table, which state "no full-duplex UTOPIA" and omit the required signal routing for independent master/slave data paths.
Is the Time Slot Assigner (TSA) available on the MPC859DSLVR50A?
No, the MPC859DSLVR50A does not include the Time Slot Assigner (TSA). This is explicitly documented in the MPC859DSL block diagram footnote: "The MPC859DSL does not contain SMC2 nor the time slot assigner." TSA omission is a deliberate part differentiation to reduce cost and complexity for DSL-only applications.
What are the power supply sequencing requirements for the MPC859DSLVR50A?
VDDL (core) must not exceed VDDH (I/O) during power-up or power-down. Both rails must remain within ±100 mV of VDDSYN (PLL). Violation risks forward-biasing ESD diodes and long-term reliability degradation. Freescale recommends using the Figure 4 voltage sequencing circuit with MUR420 and 1N5820 diodes to enforce these constraints.
Can the MPC859DSLVR50A's SCC1 be used for protocols other than Ethernet?
No - the MPC859DSLVR50A datasheet states unequivocally: "On the MPC859DSL, the SCC (SCC1) is for ethernet only." Unlike MPC859P/T variants, SCC1 is hardwired to MII and lacks HDLC/UART/SDLC capability. Attempting non-Ethernet use will result in functional failure.
MPC859DSLVR50A 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:
- 50MHz
- 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:
- I2C, IrDA, PCMCIA, SPI, TDM, UART/USART
MPC859DSLVR50A FAQ
1.How can I place an order for MPC859DSLVR50A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPC859DSLVR50A 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 MPC859DSLVR50A reliable?
The price and inventory of MPC859DSLVR50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPC859DSLVR50A is usually 5 days.
3.What payment methods are accepted for MPC859DSLVR50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPC859DSLVR50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPC859DSLVR50A?
MPC859DSLVR50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPC859DSLVR50A 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 MPC859DSLVR50A?
For technical support, including MPC859DSLVR50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPC859DSLVR50A requirements.
6.How does Aetrix verify that MPC859DSLVR50A is sourced from the original manufacturer or authorized distributors?
All MPC859DSLVR50A 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 MPC859DSLVR50A meets industry standards.
7.What is the process for return or replacement of MPC859DSLVR50A?
All MPC859DSLVR50A units undergo pre-shipment inspection (PSI). If there is an issue with MPC859DSLVR50A, 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 MPC859DSLVR50A part is unused and in its original packaging.
Return procedure for MPC859DSLVR50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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