NXP Semiconductors LPC4357FET256,551

Overview

LPC4357FET256 from NXP Semiconductors is a dual-core ARM Cortex-M4F/M0 microcontroller with 1 MB flash, 136 kB SRAM, and integrated Ethernet, dual high-speed USB, LCD controller, and EMC - deployed in industrial motor control and embedded audio systems requiring deterministic real-time processing and peripheral offload.

For engineers reviewing the LPC4357FET256 datasheet, LPC4357FET256 pinout, LPC4357FET256 application, or LPC4357FET256 equivalent, this page delivers verified core architecture details, validated LBGA256 pin mapping, confirmed LCD/USB/Ethernet feature availability, and two technically documented alternative parts for functional migration paths.

Technical Context

The LPC4357FET256 implements a tightly coupled dual-core architecture: the Cortex-M4F (204 MHz) handles real-time signal processing and system control, while the Cortex-M0 co-processor (204 MHz) manages peripheral handling and background tasks via shared AHB interconnect and GIMA event routing. Both cores access independent SRAM blocks and share the 64 kB ROM boot loader.

Its peripheral subsystem includes a 10/100T Ethernet MAC with IEEE 1588 v2 timestamping, two high-speed USB 2.0 interfaces (one with on-chip HS PHY, one with ULPI), quad-SPI Flash Interface (SPIFI) supporting execute-in-place at 52 MB/s, and an LCD controller supporting up to 1024×768 TFT panels - all accessible via configurable AHB/APB bridges and DMA channels.

Key Specifications

Pinout & Package

LBGA256 package (SOT740-2) with 256 solder balls arranged in 16×16 grid; 0.8 mm pitch; 17 mm × 17 mm footprint; 1 mm height; RoHS-compliant matte tin finish; thermal pad exposed on underside for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core ARM microcontroller applications.

Compared with LPC4357FET256, LPC4357JET256 extends thermal range without altering functionality, while LPC4337FET256 removes LCD capability and halves flash capacity - both retain identical dual-core architecture, peripheral count, and LBGA256 footprint for drop-in compatibility in non-LCD designs.

Availability

LPC4357FET256 is available at Aetrix Electronics and suitable for industrial motor control, embedded audio systems, smart energy metering, and HMI applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LPC4357FET256 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in ARM-based microcontrollers and edge processing.

The LPC43xx product line was designed for high-performance embedded applications demanding real-time determinism, peripheral richness, and dual-core flexibility - targeting industrial automation, motor control, and audio processing where legacy single-core MCUs fall short.

FAQ

What is the maximum operating frequency of the LPC4357FET256?

The LPC4357FET256 operates at a maximum CPU frequency of 204 MHz for both the ARM Cortex-M4F and Cortex-M0 cores. This frequency is achieved using internal PLLs fed from the 1–25 MHz crystal oscillator or the 12 MHz internal RC oscillator, with voltage regulation provided by the on-chip DC-to-DC converter. The LPC4357FET256 maintains full peripheral functionality at this speed.

Does the LPC4357FET256 include an LCD controller?

Yes, the LPC4357FET256 includes a fully integrated LCD controller supporting resolutions up to 1024×768, monochrome and color STN panels, and TFT color displays with 16/24-bit direct pixel mapping. This feature is explicitly confirmed for the LPC4357 variant in Table 2 of the datasheet and is physically present in the LBGA256 package - unlike LPC433x/2x/1x variants which omit this block.

How many USB interfaces does the LPC4357FET256 support, and what are their capabilities?

The LPC4357FET256 supports two high-speed USB 2.0 interfaces: USB0 (Host/Device/OTG with on-chip high-speed PHY) and USB1 (Host/Device with on-chip full-speed PHY and ULPI interface for external high-speed PHY). Both include DMA support, and USB0 includes integrated electrical test software in ROM - enabling robust USB device enumeration and host stack implementation without external transceivers.

What is the purpose of the State Configurable Timer (SCTimer/PWM) in the LPC4357FET256?

The SCTimer/PWM in the LPC4357FET256 is a programmable state machine-based timer subsystem that replaces traditional PWM peripherals. It enables complex, event-triggered waveform generation - such as multi-phase motor commutation or LED dimming sequences - without CPU intervention. Its configuration is stored in RAM and executed autonomously, reducing interrupt load and improving timing precision for the LPC4357FET256's real-time applications.

Is the LPC4357FET256 pin-compatible with other members of the LPC43xx family in LBGA256 packaging?

Yes, all LPC43xx variants in the LBGA256 package (e.g., LPC4357FET256, LPC4357JET256, LPC4337FET256) share identical pinouts and ball assignments per the SOT740-2 mechanical specification. Functional differences (e.g., LCD presence, flash size) are implemented internally and do not affect PCB layout - allowing hardware reuse across variants when selecting the LPC4357FET256 or its alternatives.