NXP Semiconductors LPC43S50FET256,551

Overview

LPC43S50FET256,551 from NXP Semiconductors is a dual-core ARM Cortex-M4/M0 microcontroller for secure embedded applications, featuring 264 kB SRAM, integrated AES encryption engine, dual high-speed USB 2.0 interfaces (one with on-chip HS PHY, one with ULPI), 10/100T Ethernet MAC with IEEE 1588 support, and LCD controller - deployed in industrial gateways and secure communication hubs.

For engineers reviewing the LPC43S50FET256,551 datasheet, LPC43S50FET256,551 pinout, LPC43S50FET256,551 application, or LPC43S50FET256,551 equivalent, key selection considerations include dual-core real-time partitioning, hardware-accelerated boot image decryption, RMII/MII Ethernet interface routing, and LBGA256 package layout constraints for high-density mixed-signal designs.

Technical Context

The LPC43S50FET256,551 implements a tightly coupled dual-core architecture where the Cortex-M4 (up to 204 MHz) handles main application tasks with FPU and MPU, while the Cortex-M0 coprocessor (also up to 204 MHz) offloads real-time I/O management and security services. Both cores share access to multiple SRAM banks, with two blocks independently power-controllable.

Its clock system includes three PLLs: one for CPU operation, one dedicated to USB0 high-speed PHY, and a third configurable as audio PLL; the 12 MHz IRC oscillator provides ±1.5% accuracy across voltage and temperature without external crystal dependency.

Key Specifications

Pinout & Package

Package: LBGA256 (Plastic low profile ball grid array; 256 balls; body 17 × 17 × 1 mm; SOT740-2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC4357FET256,551 and LPC54608J512ET180, the LPC43S50FET256,551 uniquely delivers hardware-accelerated AES alongside dual-core real-time isolation - making it the only option among the three that satisfies both secure boot compliance (e.g., IEC 62443) and deterministic peripheral offloading in industrial edge devices.

Availability

LPC43S50FET256,551 is available at Aetrix Electronics and suitable for industrial gateways, secure audio endpoints, and automotive diagnostic tools requiring stable component supply and long-term lifecycle assurance.

Supply support for LPC43S50FET256,551 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in ARM-based microcontrollers and trusted execution environments.

The LPC43S series targets high-integrity embedded systems requiring hardware-enforced security, dual-core determinism, and rich peripheral integration - designed specifically for industrial control, communication infrastructure, and secure consumer devices.

FAQ

What is the maximum operating frequency of the LPC43S50FET256,551 Cortex-M4 core?

The LPC43S50FET256,551 Cortex-M4 core operates at up to 204 MHz, enabled by its triple-PLL clock system - with one PLL dedicated to CPU operation. This frequency is achievable across the full industrial temperature range (-40°C to +105°C) when powered within the specified 2.2 V to 3.6 V supply range and using appropriate thermal management per the datasheet's power dissipation guidelines for the LBGA256 package.

Does the LPC43S50FET256,551 support hardware-accelerated AES encryption for runtime data?

Yes, the LPC43S50FET256,551 includes a dedicated AES engine supporting AES-128 and AES-256 encryption/decryption with DMA capability. It is programmable via a ROM-based API and can process data streams independent of CPU execution - enabling secure firmware updates, encrypted sensor logging, and TLS offload without compromising real-time performance of the LPC43S50FET256,551 application core.

How many USB interfaces does the LPC43S50FET256,551 provide, and what are their physical layer configurations?

The LPC43S50FET256,551 integrates two high-speed USB 2.0 interfaces: USB0 includes an on-chip high-speed PHY and supports Host/Device/OTG modes; USB1 includes an on-chip full-speed PHY plus ULPI interface for connection to external high-speed PHYs - allowing concurrent USB device enumeration and host-side peripheral attachment without shared PHY resource contention on the LPC43S50FET256,551.

What is the function of the Global Input Multiplexer Array (GIMA) in the LPC43S50FET256,551?

The GIMA in the LPC43S50FET256,551 enables dynamic, software-configurable routing of digital events (e.g., GPIO edges, timer matches, ADC EOC) to any compatible peripheral - such as SCTimer inputs, ADC start triggers, or DMA request sources. This eliminates fixed hardware dependencies and allows flexible, runtime-adaptable signal chaining - significantly reducing interrupt overhead and improving deterministic response in time-critical LPC43S50FET256,551 applications.

Can the LPC43S50FET256,551 operate without an external crystal oscillator?

Yes, the LPC43S50FET256,551 can operate without an external crystal thanks to its 12 MHz Internal RC (IRC) oscillator, trimmed to ±1.5% accuracy over voltage and temperature. This internal clock feeds the CPU PLL and supports full functionality including Ethernet, USB, and ADC operation - though for IEEE 1588 precision or USB suspend/resume compliance, an external crystal (1–25 MHz) is recommended per the LPC43S50FET256,551 datasheet's clocking requirements.