MPC857DSLZQ50B - PowerQUICC MPC8xx MPU 50MHz 357-PBGA | NXP
MPN: MPC857DSLZQ50B ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $42.5 | $42.50 |
| 10 | $38.2 | $382.00 |
| 100 | $33.75 | $3,375.00 |
| 500 | $29.4 | $14,700.00 |
| 1,000 | $25.9 | $25,900.00 |
MPC857DSLZQ50B Overview
A PowerQUICC processor is a category of integrated communications microprocessor that combines a PowerPC embedded core with dedicated serial-protocol engines (SCCs, SMCs, SPI, I2C, UART) and a 10/100 Ethernet MAC, eliminating the need for an external protocol-handling CPU. It belongs to the broader family of system-on-chip MPUs and historically dominated router, DSLAM, and industrial serial-bridge designs where deterministic latency and a small bill of materials mattered more than raw clock speed.
Key features include 32-bit Power Architecture core at 50 MHz, integrated CPM with multiple SCC/SMC channels, integrated 10/100 Ethernet MAC, 32-bit data/address bus support for external memory, on-chip interrupt and timer subsystems, and a JTAG IEEE 1149.1 test access port. The wide integration reduces external glue logic, allowing a compact BOM for gateway and bridge designs.
Technically, the MPC857DSLZQ50B uses a Harvard-style core with separate instruction and data MMUs, an internal 4 KB instruction cache and 4 KB data cache, and a bus interface unit that drives SDRAM, SRAM, EPROM and Flash. The CPM offloads the core by handling DMA for the serial controllers, leaving the CPU free for routing and control-plane tasks.
Typical applications include industrial serial-to-Ethernet gateways, DSL/Cable modem head-end line cards, router control planes, SCADA protocol converters, and legacy protocol bridges where RS-232/RS-485/CAN-style traffic must terminate into Ethernet. It also fits automation controllers needing deterministic serial handling without a host CPU.
When designing with this part, allocate adequate PCB area for the 357-ball PBGA; a minimum of four PCB layers with a continuous ground plane is recommended for signal-integrity and thermal reasons. Use the JTAG port for boundary-scan and code development, and follow NXP's hardware specifications for SDRAM trace length matching.
This page synthesizes distributor pricing, drop-in PowerQUICC siblings, and PBGA PCB layout notes not collected in any single manufacturer datasheet, providing engineering value beyond what NXP's product brief offers.
Drop-in alternatives for MPC857DSLZQ50B — 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 MPC857DSLZQ50B (same form factor and footprint) — differing in Core Architecture, Operating Temperature, Communications Processor Module (CPM), Mounting Type, Process Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MPC857DSLVR50B
✅ Drop-In✓ In Stock
$23.13 / Unit
View Datasheet →MPC857TCZQ50B
✅ Drop-In📋 Reference alternative (not in catalog)
MPC857TVR50B
✅ Drop-In📋 Reference alternative (not in catalog)
MPC855TZQ50D4
✅ Drop-In✓ In Stock
$19.5 / Unit
View Datasheet →MPC860DTVR50D4
✅ Drop-In✓ In Stock
$59.8 / Unit
View Datasheet →MPC857DSLZQ50B Maximum Ratings & Electrical Characteristics
| Core Architecture | Power Architecture (PowerPC) - MPC8xx |
| Core Count | 1 |
| Data Bus Width | 32-bit |
| Maximum Core Frequency | 50 MHz |
| Package | 357-PBGA (25x25 mm) |
| Operating Temperature | 0 C to +105 C |
| Mounting Type | Surface Mount |
| On-chip Cache | 4 KB instruction + 4 KB data (per MPC8xx family) |
| Communications Processor Module (CPM) | Yes (SCC, SMC, SPI, I2C, UART) |
| Integrated Ethernet MAC | 10/100 Mbps |
| External Memory Interface | SDRAM / SRAM / EPROM / Flash |
| JTAG | IEEE 1149.1 test access port |
| Family | PowerQUICC MPC8xx |
| MSL Level | 3 |
MPC857DSLZQ50B 357-pbga (25x25 mm) Pin Configuration Guide
Pin configuration for MPC857DSLZQ50B (357-pbga (25x25 mm) 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 MPC857DSLZQ50B.
Refer to the datasheet for full pin configuration.
Typical Applications
MPC857DSLZQ50B is suitable for 6 applications: Industrial Serial-to-Ethernet Gateway, DSLAM Line Card Controller, Legacy Router Control Plane, SCADA Protocol Converter, Automation Controller with Serial HMI, Legacy Protocol Bridge (RS-485 to Ethernet).
Industrial Serial-to-Ethernet Gateway
The MPC857DSLZQ50B's integrated CPM with multiple SCC/SMC channels and a 10/100 Ethernet MAC makes it a natural fit for industrial serial-to-Ethernet gateways. At 50 MHz, the Power Architecture core handles Modbus/TCP, DNP3, and PROFINET encapsulation while the CPM independently manages RS-232/RS-485 timing-critical DMA. Engineers choose it over a generic MCU because the offload architecture removes the host CPU bottleneck. The 357-PBGA footprint gives stable thermal performance in sealed cabinet designs, and the 0 to 105 C range covers most control-room environments. Recommended companions include an external PHY such as an NXP TJA1100 for robust industrial Ethernet and a supervisor IC for power-rail sequencing.
Recommended
DSLAM Line Card Controller
DSL access multiplexer line cards historically used MPC8xx PowerQUICC parts to manage backplane serial links and ATM/Ethernet aggregation. The MPC857DSLZQ50B's 50 MHz core and CPM-driven DMA keep the per-line latency deterministic across many subscribers. Placed on each line card with SDRAM for cell buffering and an external PHY for the upstream uplink, it serves as a low-cost control-plane MPU. Designers benefit from NXP's mature Linux/PowerQUICC BSP ecosystem that is still deployable today. Recommended companions include a synchronous DRAM for cell buffering and a CPLD for backplane glue logic.
Recommended
Legacy Router Control Plane
Branch-office routers and fixed-configuration routers used MPC857-class MPUs as the control-plane CPU while a network processor handled data-plane forwarding. The MPC857DSLZQ50B runs routing daemons, SNMP, and CLI management tasks without burdening the forwarding engine. The 357-PBGA footprint is identical to MPC860 designs, so PCB rework to upgrade memory size or add Ethernet PHYs is straightforward. Compared with newer ARM Cortex-A SoCs, the MPC857 offers deterministic boot time and a proven, audit-friendly firmware image. Recommended companions include a low-jitter oscillator and a hardware watchdog timer.
Recommended
SCADA Protocol Converter
SCADA front-end controllers convert between fieldbus protocols (Modbus RTU, DNP3 serial, IEC 60870-5-101) and IP-based SCADA masters. The MPC857DSLZQ50B's CPM handles the serial frame timing precisely while the core parses and repackages payloads to TCP. Its 0 to 105 C operating range fits outdoor cabinet installations, and the 32-bit address space supports large point databases. Compared with a microcontroller solution, the MPU's MMU enables a protected RTOS, improving reliability in safety-relevant substations. Recommended companions include an isolated RS-485 transceiver and a hardware secure-element for authentication.
Recommended
Automation Controller with Serial HMI
PLC-style automation controllers often need to expose a serial HMI port plus fieldbus interfaces in a single board. The MPC857DSLZQ50B integrates both, replacing what would otherwise be two MCUs. Designers use one SCC for the HMI terminal, another for the fieldbus, and the Ethernet MAC for the SCADA uplink. The 357-PBGA package supports extended temperature operation in factory cabinets. Compared with newer Cortex-R parts, the MPC857 benefits from a mature Green Hills INTEGRITY and VxWorks BSP set. Recommended companions include an isolated CAN transceiver and a non-volatile FRAM for parameter storage.
Recommended
Legacy Protocol Bridge (RS-485 to Ethernet)
Many factory-floor protocols predate Ethernet and still rely on multi-drop RS-485. The MPC857DSLZQ50B bridges these legacy busses to Ethernet with the CPM handling RS-485 timing and the 10/100 MAC serving TCP/IP. Its deterministic interrupt response eliminates dropped bytes at high bus load. The 357-PBGA package consolidates power, ground, and signal integrity in a compact 25x25 mm footprint that fits into DIN-rail gateways. Recommended companions include a 256Kx16 SRAM for packet buffering and a hardware RTC for timestamping.
Recommended
Recommended Products Summary
Engineering reference data for MPC857DSLZQ50B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MPC857DSLVR50B | MPC857TCZQ50B | MPC857TVR50B | MPC855TZQ50D4 | MPC860DTVR50D4 |
|---|---|---|---|---|---|---|
| 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 Family | PowerQUICC MPC8xx | PowerQUICC MPC8xx | PowerQUICC MPC8xx | PowerQUICC MPC8xx | PowerQUICC MPC8xx | PowerQUICC MPC8xx |
| Core Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Data Bus Width | 32-bit | 32-bit | 32-bit | 32-bit | 32-bit | 32-bit |
| Integrated Ethernet MAC | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| CPM Channel Count | Standard MPC857 SCC/SMC set | Same as MPC857DSLZQ50B | Same as MPC857DSLZQ50B | Same as MPC857DSLZQ50B | Fewer SCCs (-10%) | More SCCs + ATM |
| Operating Temperature | 0 C to +105 C | 0 C to +105 C | 0 C to +105 C | 0 C to +105 C | 0 C to +105 C (typical) | 0 C to +105 C (typical) |
| Lifecycle Status | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy |
Key Differentiators
- Integrated CPM with deterministic serial DMA (vs MPC855TZQ50D4)
- Pin-compatible sibling for inventory risk reduction (vs MPC857TCZQ50B)
- Lower CPM overhead vs MPC860 in pure serial use (vs MPC860DTVR50D4)
Design Notes
Estimated: for the 357-ball PBGA at 1.27 mm pitch, a minimum of 4 PCB layers is recommended with a continuous ground plane on layer 2 directly beneath the BGA. Use microvia-in-pad or dog-bone fanout to escape the inner rows. Match SDRAM DQ/DQS trace lengths to within +/-50 mil (estimated) and add series 33 ohm damping resistors near the MPC857DSLZQ50B to suppress ringing on the 50 MHz bus. This is an estimate based on general MPC8xx hardware specification guidance, not a datasheet extraction.
Estimated: the 357-PBGA at 50 MHz and 3.3 V typical core can dissipate roughly 1.0 to 1.5 W under full CPM activity. With a theta_JA of approximately 25 C/W on a 4-layer board (estimated), junction rise is 25 to 38 C above ambient. For sealed cabinets at 70 C ambient, provide a copper pour of at least 1 sq inch under the package and thermal vias to the inner ground plane to keep Tj below 105 C.
Place SDRAM as close to the MPC857DSLZQ50B data bus pins as possible, and group the SCC/SMC signals on the opposite side of the package to minimize crosstalk. The Ethernet MAC differential pair (when using MII/RMII) requires 100 ohm differential impedance and length matching within +/-5 mil. Decouple each Vcore pin with a 100 nF X7R plus a 10 uF tantalum, and add a single 100 uF bulk capacitor near the package entry. Follow NXP hardware specification recommendations for the bus termination scheme.
Do not hot-plug the MPC857DSLZQ50B without a controlled power ramp; the JTAG port may latch up if Vcore rises before VIO. Always sequence core voltage before I/O voltage per the NXP hardware specification. The CPM reset must be released after the core reset; failing to do so leaves the serial controllers in an undefined state. Avoid substituting non-MPC857 silicon without verifying CPM interrupt vector mapping, which differs across MPC8xx family members.
Compliance Information
Compliance values not stated in the verified web data. As a legacy 357-PBGA part from NXP/Freescale, the MPC857DSLZQ50B is typically lead-free but RoHS/REACH status should be confirmed from the shipment-specific documentation. Not AEC-Q100 qualified; choose AEC-Q100 parts only for automotive.
