NXP Semiconductors LPC1754FBD80K

Overview

LPC1754FBD80K from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller operating at up to 100 MHz, featuring 128 kB flash, 32 kB SRAM, USB 2.0 Device/Host/OTG interface, one CAN 2.0B channel, and 52 GPIO pins. It integrates a 12-bit ADC (200 kHz), motor control PWM, RTC with battery backup, and supports low-power modes including Deep power-down for embedded industrial control and motor drive applications.

For engineers reviewing the LPC1754FBD80K datasheet, LPC1754FBD80K pinout, LPC1754FBD80K application, or LPC1754FBD80K equivalent, key selection considerations include its LQFP80 package, single-CAN capability, absence of Ethernet and I2S, DAC inclusion, and compatibility with ARM Keil MDK and LPCXpresso toolchains.

Technical Context

The LPC1754FBD80K implements an ARM Cortex-M3 core with Harvard architecture, 3-stage pipeline, and integrated NVIC and MPU supporting eight memory regions. Its AHB multilayer matrix enables concurrent CPU, DMA, and peripheral access without arbitration delay.

Peripheral interconnect includes dual APB bridges, dedicated GPDMA channels for UART, ADC, and SSP, and pin-muxing via the Pin Connect Block. Clock generation uses main oscillator (1–25 MHz), 4 MHz RC oscillator (±1%), and dual PLLs - one for CPU and one for USB - enabling independent frequency scaling.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (12 mm × 12 mm × 1.4 mm, SOT315-1), RoHS-compliant, with 5 V-tolerant I/O on most pins and dedicated USB I/O (P0[29]/P0[30]).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1754FBD80K, LPC1756FBD80 offers double flash and dual CAN in identical packaging for seamless upgrade, while LPC1764FBD100 provides expanded I/O and memory in a larger package for next-generation feature sets.

Availability

LPC1754FBD80K is available at Aetrix Electronics and suitable for industrial motor control, smart lighting systems, energy metering interfaces, and alarm/security panels requiring stable component supply and long-term manufacturability.

Supply support for LPC1754FBD80K 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.

The LPC1700 series targets cost-sensitive, high-integration embedded control applications demanding rich analog/mixed-signal peripherals, real-time responsiveness, and low-power operation - especially where USB device/host flexibility and CAN interoperability are essential.

FAQ

Does LPC1754FBD80K support USB Host mode with external peripherals like HID keyboards or mass storage devices?

Yes, LPC1754FBD80K includes a full-featured USB 2.0 Host/Device/OTG controller with on-chip PHY and dedicated DMA. It supports standard USB classes including HID and MSC when paired with appropriate host stack firmware (e.g., NXP's USB Host Library). The USB_D+ and USB_D− pins (P0[29]/P0[30]) require proper ESD protection and impedance-controlled routing per USB specification.

What is the maximum achievable sampling rate of the 12-bit ADC in LPC1754FBD80K, and how is it triggered?

The 12-bit ADC in LPC1754FBD80K achieves up to 200 kHz conversion rate using its internal 4.5 MHz clock derived from the system clock. Conversions can be triggered by software, timer match events, or external signals; results are stored in multiple registers and accessible via GPDMA for continuous streaming without CPU intervention - critical for real-time sensor acquisition.

Can LPC1754FBD80K operate from a 2.4 V supply, and what are the implications for peripheral functionality?

Yes, LPC1754FBD80K operates across 2.4 V to 3.6 V. At 2.4 V, the maximum CPU frequency is reduced to 72 MHz (per datasheet Section 10.2), and USB functionality is disabled due to insufficient voltage margin for the on-chip PHY. All digital I/O remains 5 V tolerant, but analog accuracy (ADC/DAC) may degrade slightly; design validation at minimum VDD is recommended.

How does the Wakeup Interrupt Controller (WIC) function in Deep power-down mode for LPC1754FBD80K?

In Deep power-down mode, the WIC enables LPC1754FBD80K to wake up via RTC alarm, external interrupt (EINT0 on P2[10]), USB activity, CAN bus activity, or Port 0/2 pin change - all while consuming <1 μA. The WIC retains interrupt priority and vector information, allowing immediate context restoration upon wake-up without boot ROM reinitialization.

Is the DAC output on LPC1754FBD80K rail-to-rail, and what is its typical settling time?

No, the 10-bit DAC output on LPC1754FBD80K is not rail-to-rail; it sources up to VREF (typically 3.3 V) with a minimum output of ~0.2 V. Its typical settling time is 4.5 μs to ±½ LSB (per datasheet Figure 30), making it suitable for audio tone generation and slow-control loop references but not high-speed waveform synthesis.