MPC857DSLVR50B - MPC8xx PowerQUICC MPU 50MHz 357-PBGA | NXP
MPN: MPC857DSLVR50B ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $38.54 | $38.54 |
| 10 | $34.69 | $346.90 |
| 100 | $30.83 | $3,083.00 |
| 500 | $27.05 | $13,525.00 |
| 1,000 | $23.13 | $23,130.00 |
MPC857DSLVR50B Overview
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.
Drop-in alternatives for MPC857DSLVR50B — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MPC857DSLVR50B (same form factor and footprint) — differing in Operating Temperature, Core Architecture, Process Technology, Mounting Type, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesMPC857DSLVR50B Maximum Ratings & Electrical Characteristics
| 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) |
| Package | 357-PBGA (25x25 mm) |
| Process Technology | 0.32 um CMOS |
| Operating Temperature | 0C to +105C |
| Mounting Type | Surface Mount (BGA) |
| Series | MPC8xx / PowerQUICC |
| Terminal Form | Ball |
| Number of Terminals | 357 |
| Package Code | BGA |
MPC857DSLVR50B bga Pin Configuration Guide
Pin configuration for MPC857DSLVR50B (bga package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MPC857DSLVR50B.
Refer to the datasheet for full pin configuration.
Typical Applications
MPC857DSLVR50B is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for MPC857DSLVR50B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Same-package higher-speed upgrade path (vs MPC857DSLVR66B)
- Maximum speed variant in same package (vs MPC857DSLVR80B)
- Industrial temperature grade vs commercial alternatives (vs MPC855TVR50D4)
Design Notes
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.
Compliance Information
RoHS/REACH compliance not stated explicitly in the verified web data - confirm with distributor lot documentation. Part is obsolete per NXP distributor listings.
