NXP Semiconductors LPC1758FBD80K

Overview

LPC1758FBD80K from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller operating at up to 100 MHz, featuring 512 kB flash, 64 kB SRAM (32+16+16), Ethernet MAC with RMII, USB 2.0 Host/Device/OTG, dual CAN 2.0B, I2S, 10-bit DAC, and 52 GPIO pins in an 80-pin LQFP package. It targets industrial networking and motor control systems requiring integrated connectivity and real-time analog/digital I/O.

For engineers reviewing the LPC1758FBD80K datasheet, LPC1758FBD80K pinout, LPC1758FBD80K application, or LPC1758FBD80K equivalent, key selection criteria include Ethernet + USB + dual CAN coexistence, 100 MHz deterministic execution, on-chip DMA-accelerated peripherals, and 80-pin LQFP layout compatibility with legacy LPC17xx designs.

Technical Context

The LPC1758FBD80K implements a Harvard-architecture ARM Cortex-M3 core with 3-stage pipeline, MPU supporting eight regions, and NVIC for low-latency interrupt handling. Its multilayer AHB matrix enables concurrent CPU, Ethernet MAC, USB, and GPDMA access without arbitration delay.

Peripheral integration includes dedicated DMA controllers for Ethernet (LPC1758-only), USB, and audio subsystems; split APB buses reduce CPU-DMA contention; and pin-muxing via the Pin Connect Block allows dynamic assignment of UART, SSP, I2C, CAN, PWM, ADC, and I2S functions across Port 0–2 and Port 4.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (SOT315-1), body size 12 mm × 12 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant plastic housing with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with LPC1768FBD100 and LPC1778FBD100, the LPC1758FBD80K delivers optimal balance of Ethernet + USB + dual CAN in compact 80-pin LQFP-ideal for space-constrained gateways where SDIO or LCD are unnecessary.

Availability

LPC1758FBD80K is available at Aetrix Electronics and suitable for industrial networking gateways, motor control systems, eMetering endpoints, and smart lighting controllers requiring stable component supply and long-term manufacturability.

Supply support for LPC1758FBD80K 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 applications, with deep expertise in ARM-based microcontrollers and edge processing.

The LPC17xx family was designed for demanding embedded applications requiring rich peripheral integration, real-time determinism, and low-power operation-particularly in industrial automation, energy metering, and motor control.

FAQ

What is the maximum operating frequency of the LPC1758FBD80K?

The LPC1758FBD80K operates at a maximum CPU frequency of 100 MHz. This is achieved using the on-chip PLL, which can be driven by the main oscillator (1–25 MHz crystal), internal 4 MHz RC oscillator, or RTC oscillator. The flash accelerator enables zero-wait-state execution at this speed, ensuring deterministic real-time performance critical for industrial control loops and protocol timing.

Does the LPC1758FBD80K include an Ethernet MAC, and what interface does it support?

Yes, the LPC1758FBD80K integrates a full Ethernet MAC supporting Reduced Media Independent Interface (RMII). It includes dedicated DMA and uses pins P1[0], P1[1], P1[4], P1[8], P1[9], P1[10], P1[14], and P1[15] for RMII signals. Unlike the LPC1759, it does not support MII; RMII reduces pin count and simplifies PCB layout while maintaining 10/100 Mbps throughput for industrial Ethernet applications.

How many CAN interfaces does the LPC1758FBD80K support, and are they CAN 2.0A or 2.0B compliant?

The LPC1758FBD80K supports two CAN 2.0B-compliant controllers. Both CAN1 and CAN2 implement full CAN 2.0B specification including extended frame support (29-bit identifiers), error confinement, and automatic retransmission. CAN1 uses P0[0]/RD1 and P0[1]/TD1; CAN2 uses P2[7]/RD2 and P2[8]/TD2 - enabling dual-bus diagnostics or redundant fieldbus communication in safety-critical systems.

What analog-to-digital and digital-to-analog capabilities does the LPC1758FBD80K provide?

The LPC1758FBD80K includes a 12-bit ADC with six input channels (AD0[2]–AD0[7]), sampling up to 200 kHz, and a 10-bit DAC with dedicated conversion timer and DMA support (AOUT on P0[26]). The ADC supports burst mode and result registers for efficient data capture; the DAC provides rail-to-rail output with programmable update rate - suitable for audio playback, sensor calibration references, or analog actuator control.

Is the LPC1758FBD80K pin-compatible with other members of the LPC17xx family?

The LPC1758FBD80K shares the same 80-pin LQFP (SOT315-1) package and core pinout with LPC1751/52/54/56/59FBD80 variants, but functional pin assignments differ. For example, Ethernet pins (P1[0], P1[1], etc.) and I2S signals (P0[6]–P0[9]) are only active on LPC1758/59/56. Migration requires verification of peripheral usage and pin connect block configuration - not a direct drop-in replacement for non-Ethernet variants.