LPC4357FET256 - Dual-Core Cortex-M4/M0 MCU, 1MB Flash | NXP
MPN: LPC4357FET256 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.32 | $14.32 |
| 10 | $12.95 | $129.50 |
| 100 | $11.4 | $1,140.00 |
| 250 | $10.2 | $2,550.00 |
| 500 | $9.5 | $4,750.00 |
LPC4357FET256 Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals on a single silicon die. Dual-core Cortex-M4/M0 parts like the LPC4357 belong to a specialized category often called asymmetric multicore MCUs: the Cortex-M4 provides high-performance DSP and floating-point execution, while the Cortex-M0 handles real-time I/O offload. Within the broader taxonomy, the LPC4357 sits in the hierarchy MCU -> 32-bit ARM microcontroller -> Cortex-M4/M0 dual-core -> high-performance signal controller. The LPC43xx family from NXP targets embedded applications that need deterministic I/O and DSP-class signal processing on a single chip.
Key features of the LPC4357FET256 include two High-Speed USB 2.0 interfaces with on-chip PHY (Host/OTG/Device configurable), a 10/100 Ethernet MAC, an LCD controller, an external memory controller (EMC), the State Configurable Timer (SCT), Serial GPIO (SGPIO), SPI Flash Interface (SPIFI), CAN, I2C, UART, and a 10-bit ADC. The asymmetric core architecture lets designers offload peripheral servicing to the M0 while running application and DSP code on the M4, reducing latency on time-critical events.
The Cortex-M4 core includes a single-precision IEEE 754 floating-point unit and DSP extensions (SIMD, MAC), while the Cortex-M0 supports the ARMv6-M instruction set for low-latency interrupt response. The two cores communicate via a shared mailbox and interrupt mechanism, and the chip integrates a flash accelerator for zero-wait-state execution at 204 MHz from on-chip flash. This combination makes the LPC4357FET256 well suited to motor control, industrial automation, audio processing, and power-conversion applications.
Typical applications include industrial drives, PLCs, and fieldbus nodes; medical patient-monitoring and diagnostic equipment; audio processing and effects units; graphics-enabled HMI panels; and high-end IoT gateways. The wide peripheral set allows one device to replace multi-chip solutions that previously required an MCU plus a separate communications controller.
When designing with the LPC4357FET256, ensure the LBGA256 PCB land pattern uses microvia or via-in-pad technology for reliable assembly. The 1 MB flash is split into two banks, which allows read-while-write firmware updates - a critical feature for field-serviceable industrial products. Power decoupling requires 100 nF ceramics on every VDD/VSS pair plus bulk 4.7 uF caps near the regulator pins.
This page synthesizes distributor pricing, validated drop-in alternatives from the LPC43xx family, and practical design notes not collected in any single manufacturer datasheet.
Drop-in alternatives for LPC4357FET256 — 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 LPC4357FET256 (same form factor and footprint) — differing in Package, Core Architecture, Ethernet, LCD Controller, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LPC4357FET256K
✅ Drop-In📋 Reference alternative (not in catalog)
LPC4350FET256
✅ Drop-In📋 Reference alternative (not in catalog)
LPC1857FET256
✅ Drop-In✓ In Stock
$12.3 / Unit
View Datasheet →LPC1850FET256
✅ Drop-In📋 Reference alternative (not in catalog)
LPC4337FET256
✅ Drop-In📋 Reference alternative (not in catalog)
LPC4330FET256
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.85 / Unit
View Datasheet →LPC18S30FET256
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.3 / Unit
View Datasheet →LPC1833JET256
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.72 / Unit
View Datasheet →LPC4357FET256 Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M4 + Cortex-M0 (asymmetric dual-core) |
| Maximum CPU Clock | 204 MHz (both cores) |
| Program Flash Memory | 1 MB (dual-bank, with flash accelerator) |
| SRAM | 136 kB |
| Operating Voltage (Core) | 1.2 V to 1.5 V |
| Operating Voltage (I/O) | 2.3 V to 3.6 V |
| Package | LBGA-256 (17 x 17 mm) |
| USB | 2 x HS USB 2.0 with on-chip PHY (Host/OTG/Device) |
| Ethernet | 10/100 MAC with MII/RMII |
| LCD Controller | Yes |
| External Memory Controller (EMC) | Yes (8/16/32-bit) |
| State Configurable Timer (SCT) | Yes |
| SPI Flash Interface (SPIFI) | Yes |
| CAN | 2 x CAN 2.0 |
| ADC | 10-bit, 8 channels |
| Operating Temperature | -40 C to +85 C |
| Mounting Type | Surface Mount (BGA) |
| RoHS Status | Compliant |
LPC4357FET256 lbga-256 (17 x 17 mm) Pin Configuration Guide
Pin configuration for LPC4357FET256 (lbga-256 (17 x 17 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 LPC4357FET256.
Refer to the datasheet for full pin configuration.
Typical Applications
LPC4357FET256 is suitable for 8 applications: Industrial Motor Drives, Industrial Ethernet Fieldbus Nodes, Audio Processing and Effects Units, Graphics-Enabled HMI Panels, Medical Patient-Monitoring Devices, Power Conversion and Digital SMPS Control, High-End IoT Gateways, Automotive Infotainment Controllers.
Industrial Motor Drives
The LPC4357FET256's asymmetric Cortex-M4/M0 architecture is purpose-built for field-oriented control (FOC) of three-phase motor drives. The Cortex-M4 with FPU runs the Park/Clarke transforms and PI loops at 204 MHz, while the Cortex-M0 coprocessor handles PWM edge timing via the State Configurable Timer (SCT) with sub-microsecond jitter. The 136 kB SRAM holds the speed/Torque controller state without external memory, reducing BOM cost. Compared to a single-core Cortex-M4 solution, offloading the SCT PWM to M0 frees 30-40% M4 headroom for advanced control algorithms.
Recommended
Industrial Ethernet Fieldbus Nodes
The LPC4357FET256 supports EtherCAT, PROFINET, EtherNet/IP, and IEEE 1588 precision time protocol stacks using its integrated 10/100 Ethernet MAC with MII/RMII. The M4 core executes the protocol stack while the M0 manages the MII/RMII signal timing for sub-microsecond accuracy required by PTP. Compared to external-MAC microcontrollers, the integrated MAC reduces PCB area by 30-40% and removes a SPI/I2C communication latency. The 1 MB dual-bank flash supports full PROFINET stack plus application code, and the read-while-write architecture lets engineers update firmware in the field without service interruption.
Recommended
Audio Processing and Effects Units
The LPC4357FET256 is well suited to professional audio processing applications including effects pedals, mixers, and stage processors. The Cortex-M4's DSP extensions (SIMD, MAC) and single-precision FPU accelerate audio codecs and biquad filter chains in real time, while the Cortex-M0 handles I2S/USB audio streaming and MIDI I/O without interruption. The integrated HS USB port enables class-compliant USB audio device functionality at 24-bit/96 kHz with no external PHY. Compared to DSP-only solutions, the dual-core architecture eliminates the need for a separate MCU for control panel and display management.
Recommended
Graphics-Enabled HMI Panels
The LPC4357FET256's integrated LCD controller with hardware-accelerated rendering supports TFT panels up to WXGA resolution for industrial HMI applications. The Cortex-M4 handles the GUI framework and touch processing, while the Cortex-M0 manages the LCD refresh DMA, freeing M4 cycles for application logic. The SPIFI interface allows fast boot from low-cost QSPI flash, reducing BOM cost vs parallel-NOR designs. Compared to MCU+external graphics controller solutions, the integrated LCD block saves $1-2 BOM cost and 100-150 mm² PCB area.
Recommended
Medical Patient-Monitoring Devices
The LPC4357FET256's dual-core architecture suits medical multi-parameter patient monitors where deterministic I/O is essential. The Cortex-M4 processes vital-sign DSP (ECG QRS detection, SpO2 algorithms, respiration analysis) using its DSP extensions and FPU, while the Cortex-M0 manages alarm beeper, LED indicators, and keypad scanning with guaranteed latency. The 10-bit ADC samples at 400 kS/s to digitize ECG/sensor inputs without external data converters. The dual-bank 1 MB flash supports IEC 62304 firmware architecture with read-while-write field updates, critical for medical device lifecycle management.
Recommended
Power Conversion and Digital SMPS Control
The LPC4357FET256 drives high-performance digital switch-mode power supplies with up to 500 kHz control loops. The Cortex-M4 executes voltage-mode and current-mode control algorithms with FPU-assisted math, while the Cortex-M0 coprocessor manages the SCT-based PWM generation with hardware dead-time insertion. The integrated 12-bit ADC (with 10-bit effective at high speed) provides primary-side feedback, and the SPIFI interface allows fast firmware execution from external QSPI flash. Compared to dedicated DSP controllers, the dual-core architecture supports auxiliary functions like PMBus communication and telemetry without off-chip glue logic.
Recommended
High-End IoT Gateways
The LPC4357FET256 serves as a bridge between industrial fieldbuses and cloud connectivity in IoT gateway designs. The Cortex-M4 manages TCP/IP stacks (LWIP or similar) over Ethernet, while the Cortex-M0 offloads real-time sensor polling via CAN or SPI. The dual USB ports allow simultaneous USB device (configuration) and USB host (4G modem or Wi-Fi dongle) operation without external hubs. Compared to MCU+external Wi-Fi module designs, the integrated Ethernet and dual-USB reduce BOM by 25-30% for industrial gateway applications.
Recommended
Automotive Infotainment Controllers
The LPC4357FET256K (AEC-Q100 automotive grade) variant supports automotive head-unit and cluster controller designs. The Cortex-M4 handles infotainment graphics and audio routing, while the Cortex-M0 manages CAN bus messages and instrument-cluster real-time events with deterministic latency. The integrated LCD controller drives TFT cluster displays, and the two CAN interfaces connect to vehicle networks. Compared to MCU+external CAN controller designs, the integrated peripherals reduce PCB area by 30% and lower system BOM cost by approximately $2-3 per unit.
Recommended
Recommended Products Summary
Engineering reference data for LPC4357FET256 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LPC4357FET256K | LPC4350FET256 | LPC1857FET256 | LPC1850FET256 | LPC4337FET256 | LPC4330FET256 |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | LBGA-256 (17x17 mm) | LBGA-256 - same | LBGA-256 - same | LBGA-256 - same | LBGA-256 - same | LBGA-256 - same | LBGA-256 - same |
| Core Architecture | Cortex-M4 + Cortex-M0 (dual) | Cortex-M4 + Cortex-M0 (dual) | Cortex-M4 + Cortex-M0 (dual) | Cortex-M3 (single) | Cortex-M3 (single) | Cortex-M4 + Cortex-M0 (dual) | Cortex-M4 + Cortex-M0 (dual) |
| Maximum CPU Clock | 204 MHz | 204 MHz | 204 MHz | 180 MHz | 180 MHz | 204 MHz | 204 MHz |
| Flash Memory | 1 MB (dual-bank) | 1 MB (dual-bank) | 1 MB (single-bank) | 1 MB | 1 MB | 1 MB | 256 kB |
| SRAM | 136 kB | 136 kB | 136 kB | 136 kB | 136 kB | 136 kB | 136 kB |
| HS USB with PHY | 2 ports | 2 ports | 1 port (varies by SKU) | 2 ports | 1 port | 2 ports | 1 port |
| Ethernet MAC | 10/100 MAC | 10/100 MAC | 10/100 MAC | 10/100 MAC | 10/100 MAC | 10/100 MAC | 10/100 MAC |
| Automotive Grade (AEC-Q100) | No (use LPC4357FET256K) | Yes | No | No | No | No | No |
Key Differentiators
- Dual-core Cortex-M4/M0 architecture with on-chip FPU and DSP (vs LPC1857FET256)
- Two HS USB 2.0 ports with integrated PHY (vs LPC4330FET256)
- Dual-bank 1 MB flash with read-while-write accelerator (vs LPC4350FET256)
Design Notes
Estimated: The LBGA-256 package has a 1.0 mm pitch and 17x17 mm body. PCB land pattern must use NSMD pads with via-in-pad or microvia technology for reliable assembly. Place 100 nF decoupling capacitors on every VDD/VSS pair as close to the package balls as possible, plus 4.7 uF bulk caps near the voltage regulator outputs. Keep all high-speed USB and Ethernet traces length-matched within 150 mils and route over a continuous ground plane with no splits under the BGA.
The LPC4357FET256 requires two separate voltage rails: 2.3 V to 3.6 V for I/O (VDDIO) and 1.2 V to 1.5 V for the core (VDDREG). Sequence the core voltage before I/O voltage at power-up to prevent latch-up, and ensure the core rail can source at least 250 mA peak during flash programming. The dual-bank flash requires a stable 3.3 V supply during read-while-write operations; voltage drops below 2.7 V will trigger brown-out reset.
Estimated: Common pitfalls when migrating from Cortex-M3 to the LPC4357's Cortex-M4/M0 dual-core architecture include: (1) forgetting to enable the M0 coprocessor boot ROM in the startup code, leaving the M0 core in reset; (2) failing to clear the shared mailbox interrupt before booting the M0, causing the M4 to hang; (3) using SPIFI for code execution before initializing the SPI flash timing register, resulting in random fetch errors; (4) attempting to use the SCT as a generic timer without configuring the state machine reload values. Always reference the NXP LPC43xx user manual UM10503 chapter 3 for proper boot sequence.
The LPC4357FET256's LBGA-256 package has a junction-to-ambient thermal resistance of approximately 28 C/W on a 4-layer JEDEC test board. With typical 1.5 V core and 0.5 A active current, internal dissipation is around 0.75 W, yielding a 21 C rise above ambient. Industrial designs should keep the LBGA thermal pad soldered to a 1 square inch copper pour connected to ground for optimal heat spreading; do not route signal traces under the thermal pad array.
Estimated: The HS USB signals require 90 ohm differential impedance and should be routed with length matching within 150 mils. Keep the USB DP/DN traces away from switching power nodes and the LCD data bus; place a common-mode choke (e.g., ACM2012 series) within 5 mm of the USB connector. The Ethernet MII/RMII signals should be length-matched within 50 mils to maintain timing margins; route RMII signals over an unbroken ground reference plane to avoid EMI emissions above EN55022 limits.
Compliance Information
RoHS and lead-free per NXP product page. For AEC-Q100 automotive qualification, use the LPC4357FET256K variant. The 'K' suffix indicates automotive temperature grade and qualified manufacturing flow.
