MPC857DSLVR50B - MPC8xx PowerQUICC MPU 50MHz 357-PBGA | NXP
MPN： MPC857DSLVR50B ✗ 停產MPC857DSLVR50B 概覽
An MPU (Microprocessor Unit) is the central processing unit of an embedded system, executing instruction streams fetched from memory and orchestrating peripherals. The MPC8xx family is a line of PowerPC-based microprocessors in the broader taxonomy MPU -> embedded processor -> microprocessor -> integrated circuit -> semiconductor. The 'PowerQUICC' name denotes NXP/Freescale parts that pair a PowerPC core with the CPM (Communications Processor Module) - a RISC engine dedicated to serial-communication tasks, offloading DMA, HDLC, Ethernet, ATM, and serial-protocol handling from the main CPU.
Key features of the MPC857DSLVR50B include 50 MHz PowerPC core, integrated CPM with up to 10 Mbps Ethernet (one port) plus 10/100 Mbps Ethernet (one port), DRAM controller, and a 32-bit external data bus. The 357-ball plastic BGA exposes the full PowerQUICC peripheral set: SCCs, SMCs, SPI, I2C, PCMCIA, memory controller, and general-purpose I/O. Per the NXP product listing, the part is built on a 0.32 micrometer process and ships in tray packaging.
Architecturally, the device combines an integer PowerPC core with the CPM coprocessor via an internal bus; the CPM uses microcode-driven RISC engines (CPs) for serial channel termination, enabling simultaneous multi-protocol handling. The 32-bit core performs general control-plane code (RTOS, networking stack, system management), while the CPM handles time-critical data-plane communication without CPU intervention. The integrated DRAM controller and PCI bridge (via UTOPIA/standard MPC8xx peripherals) reduce the chip count of typical routing/bridging designs.
Typical applications include industrial Ethernet routers, telecom edge equipment, protocol bridges, low-speed DSL/cable modem control planes, and embedded control-plane subsystems requiring deterministic serial-channel handling. The 50 MHz core and CPM combination is well suited to designs where the host CPU runs management/control software while the CPM terminates serial bearers in parallel.
When designing with this part, verify that the 357-ball PBGA PCB land pattern, power-rail sequencing, and 50 MHz system clock match the MPC8xx reference design. Pay particular attention to the BSDL/ boundary-scan compliance and the JTAG TAP for production test. Because this part is reported as obsolete by some distributors, lifecycle planning and second-source identification are recommended during the design phase.
This page synthesizes distributor pricing, the same-family NXP alternatives, and practical design considerations that are not consolidated in the manufacturer datasheet.
直接替換替代品，適用於 MPC857DSLVR50B — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MPC857DSLVR50B （相同外形與佔位） — 差異在於 Operating Temperature, Core Architecture, Series, Package, Process Technology.
MPC857DSLVR66B
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MPC857DSLVR80B
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MPC857T
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MPC855TCVR50D4
✅ 直接替換聯絡詢價
查看資料表 →MPC855TVR50D4
✅ 直接替換聯絡詢價
查看資料表 →MPC857DSLVR50B 最大額定值與電氣特性
| Core Processor | PowerPC MPC8xx |
| Number of Cores | 1 |
| Bus Width | 32-bit |
| Core Speed | 50 MHz |
| Co-Processors / DSP | Communications; CPM |
| RAM Controllers | DRAM |
| Graphics Acceleration | No |
| Ethernet | 10 Mbps (1 port), 10/100 Mbps (1 port) |
| 封裝 | 357-PBGA (25x25 mm) |
| Process Technology | 0.32 um CMOS |
| 工作溫度 | 0C to +105C |
| 安裝類型 | Surface Mount (BGA) |
| Series | MPC8xx / PowerQUICC |
| Terminal Form | Ball |
| Number of Terminals | 357 |
| Package Code | BGA |
MPC857DSLVR50B bga 腳位配置指南
MPC857DSLVR50B（bga 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MPC857DSLVR50B.
請參閱 資料表 以查看完整腳位配置。
典型應用
MPC857DSLVR50B 適用於 6 應用s: Industrial Ethernet Router, Telecom Edge Equipment / Protocol Bridge, Low-Speed DSL / Cable Modem Control Plane, Embedded Control-Plane Subsystem, Legacy Networking Equipment Sustaining Engineering, Industrial Serial-Communication Concentrator.
Industrial Ethernet Router
The MPC857DSLVR50B suits industrial Ethernet routers, with the integrated CPM offloading HDLC/PPP framing and the dual Ethernet ports (10 Mbps plus 10/100 Mbps) handling WAN/LAN bridging without external MACs. Its 50 MHz PowerPC core runs the routing stack, while the CPM's RISC engines terminate serial bearers deterministically. The 357-ball PBGA exposes the full MPC8xx peripheral set, and the 0 to 105C operating range enables deployment in industrial enclosures.
推薦
Telecom Edge Equipment / Protocol Bridge
The MPC857DSLVR50B fits telecom edge equipment and protocol bridges that need deterministic serial-channel handling. The CPM's microcode-driven RISC engines handle up to several SCC/SMC channels in hardware, while the PowerPC core runs the management/control-plane stack. The integrated DRAM controller and 32-bit data bus reduce external chip count, simplifying the BOM. Designers value the PowerQUICC family's proven telecom-software ecosystem.
推薦
Low-Speed DSL / Cable Modem Control Plane
The MPC857DSLVR50B targets low-speed DSL and cable modem control-plane designs where the host CPU runs the protocol stack and the CPM terminates the data bearers. Its 50 MHz core is adequate for control-plane code, while the CPM's serial engines handle ATM/HDLC framing for DSL/cable links. The 0.32 um CMOS process and proven PowerQUICC architecture make it a mature choice for legacy DSLAM and CMTS-adjacent designs still in field deployment.
推薦
Embedded Control-Plane Subsystem
The MPC857DSLVR50B serves embedded control-plane subsystems that pair general-purpose computing with deterministic serial I/O. The 32-bit PowerPC core runs an RTOS or control stack, while the CPM handles time-critical serial traffic. The 357-ball PBGA exposes PCMCIA, SPI, I2C, and UTOPIA interfaces for flexible system expansion. The 0 to 105C temperature grade supports industrial and outdoor installations.
推薦
Legacy Networking Equipment Sustaining Engineering
The MPC857DSLVR50B remains in demand for legacy networking equipment sustaining engineering, where long-lifecycle deployments (telco, industrial, defense) need form-fit-function replacements for end-of-life PowerQUICC MPC8xx sockets. The 357-ball PBGA footprint, JTAG BSDL file, and proven PowerQUICC peripheral set ease re-qualification. With the part marked obsolete by NXP, distributors like Rochester Electronics and Heisener carry remaining inventory for sustaining builds.
推薦
Industrial Serial-Communication Concentrator
The MPC857DSLVR50B excels in industrial serial-communication concentrators where multiple synchronous serial bearers converge onto Ethernet. The CPM's SCC/SMC channels terminate each bearer in hardware, while the PowerPC core runs the aggregation/management logic. The dual Ethernet ports (10 Mbps plus 10/100 Mbps) connect to upstream switches, and the 32-bit bus connects to external DRAM and flash. The 0 to 105C operating range supports factory-floor deployment.
推薦
推薦產品摘要
工程參考資料，適用於 MPC857DSLVR50B — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MPC857DSLVR66B | MPC857DSLVR80B | MPC857T | MPC855TCVR50D4 | MPC855TVR50D4 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 357-PBGA (25x25) | 357-PBGA (25x25) - same | 357-PBGA (25x25) - same | 357-PBGA (25x25) - same | 357-PBGA (25x25) - same | 357-PBGA (25x25) - same |
| Core Speed | 50 MHz | 66 MHz | 80 MHz | 50 MHz | 50 MHz | 50 MHz |
| Bus Width | 32-bit | 32-bit | 32-bit | 32-bit | 32-bit | 32-bit |
| Ethernet | 10 Mbps (1) + 10/100 Mbps (1) | 10 Mbps (1) + 10/100 Mbps (1) | 10 Mbps (1) + 10/100 Mbps (1) | 10 Mbps (1) + 10/100 Mbps (1) | 10/100 Mbps (1) variant | 10/100 Mbps (1) variant |
| Operating Temperature | 0C to +105C | 0C to +105C | 0C to +105C | 0C to +105C | 0C to +70C (commercial) | 0C to +70C (commercial) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Family / Series | MPC8xx / PowerQUICC | MPC8xx / PowerQUICC | MPC8xx / PowerQUICC | MPC8xx / PowerQUICC | MPC8xx / PowerQUICC | MPC8xx / PowerQUICC |
主要差異化特點
- Same-package higher-speed upgrade path (對比MPC857DSLVR66B)
- Maximum speed variant in same package (對比MPC857DSLVR80B)
- Industrial temperature grade vs commercial alternatives (對比MPC855TVR50D4)
設計說明
The 357-ball PBGA requires a 4-layer PCB minimum with continuous power and ground planes under the BGA. Per the PowerQUICC MPC8xx hardware reference, vias-in-pad (VIP) are recommended for the BGA balls to maximize breakout density and reduce parasitic inductance. Decoupling capacitors (100 nF ceramic) must be placed as close to each power pin as possible, with bulk decoupling (10 uF to 22 uF tantalum or polymer) on each power rail.
Estimated: at 50 MHz full-activity core and 3.3V I/O, the MPC857DSLVR50B dissipation is approximately 1.5-2.0 W. The 357-ball PBGA has theta_JA around 15-20 C/W in still air, yielding a junction temperature rise of 30-40 C above ambient. At 105C max junction, ambient must stay below 65-75 C. In enclosed industrial enclosures, provide airflow or attach a heatsink to keep junction within limits.
Because the part is reported obsolete, do not design it into new platforms without lifecycle planning. Cross-check RoHS compliance status at the lot level - some legacy PowerQUICC stock is non-RoHS. Always verify JTAG BSDL file version against the silicon revision (B for the 'B' suffix). Confirm CPM firmware/microcode compatibility with the chosen serial-protocol stack before committing to production.
Route the 32-bit external data bus with matched impedance (typically 50 ohm single-ended) and matched length to within +/- 50 mil across the byte lane. The address bus and SDRAM clock also require length matching. Keep the system clock (50 MHz) and PCI clock traces short and guarded by ground to reduce EMI. The CPM's serial channels benefit from short, impedance-controlled traces to the PHY.
合規資訊
RoHS/REACH compliance not stated explicitly in the verified web data - confirm with distributor lot documentation. Part is obsolete per NXP distributor listings.
