NXP Semiconductors LPC1774FBD144,551

Overview

LPC1774FBD144,551 from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller designed for embedded control applications requiring integrated peripherals, low-power operation, and deterministic real-time response. It operates at up to 120 MHz, integrates 128 kB flash, 40 kB SRAM (32 kB main + 8 kB peripheral), 2048-byte EEPROM, an 8-channel 12-bit ADC, and a 10-bit DAC. It supports four UARTs, three I²C interfaces, two CAN channels, USB Device-only functionality, and 109 GPIO pins in LQFP144 packaging - deployed in industrial motor drives and programmable logic controllers.

For engineers reviewing the LPC1774FBD144,551 datasheet, LPC1774FBD144,551 pinout, LPC1774FBD144,551 application, or LPC1774FBD144,551 equivalent, key selection criteria include its 120 MHz Cortex-M3 core with MPU, USB Device-only support (no Host/OTG), absence of Ethernet and LCD controller, reduced peripheral SRAM allocation, and LQFP144 package with 109 GPIO - critical for space-constrained industrial control designs requiring CAN, UART, and analog I/O.

Technical Context

The LPC1774FBD144,551 implements a Harvard-architecture ARM Cortex-M3 CPU with 3-stage pipeline, integrated Memory Protection Unit (MPU) supporting eight regions, and Nested Vectored Interrupt Controller (NVIC). Its multilayer AHB matrix enables concurrent access by CPU, USB, GPDMA, and other masters without arbitration delay unless accessing the same slave.

Peripheral integration includes a General Purpose DMA controller supporting SSP, UART, ADC, DAC, and timer match signals; a Quadrature Encoder Interface (QEI); four general-purpose timers with capture/compare; two standard PWM blocks; and a motor-control PWM. The device lacks Ethernet MAC, LCD controller, and SD/MMC interface - confirmed by Table 2 ordering options.

Key Specifications

Pinout & Package

LQFP144 package: plastic low-profile quad flat package, 144 leads, 20 mm × 20 mm body, 1.4 mm height, lead pitch 0.5 mm - compatible with standard surface-mount assembly and rework processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1778FBD144,551 and LPC1769FBD100,551, the LPC1774FBD144,551 offers optimal balance of CAN/UART-rich I/O, deterministic real-time performance, and cost-sensitive footprint - making it ideal for standalone industrial controllers where Ethernet, LCD, or USB host are unnecessary.

Availability

LPC1774FBD144,551 is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers, and medical infusion pumps requiring stable component supply and long-term production continuity.

Supply support for LPC1774FBD144,551 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The LPC17xx family was designed for high-integration embedded control in industrial automation, motor drives, and medical equipment - emphasizing real-time determinism, peripheral richness, and robustness in harsh environments.

FAQ

What is the maximum operating frequency of the LPC1774FBD144,551?

The LPC1774FBD144,551 operates at up to 120 MHz using its ARM Cortex-M3 core. This frequency is achieved via an on-chip PLL that can be driven by either the main crystal oscillator (1–25 MHz range) or the internal 12 MHz RC oscillator. The device maintains full peripheral functionality at this speed, including USB Device, CAN, and ADC operations - verified in Section 2 "Features and benefits" and Table 2 of the datasheet.

Does the LPC1774FBD144,551 support USB Host or OTG functionality?

No, the LPC1774FBD144,551 supports USB 2.0 full-speed Device-only mode. Unlike higher-tier LPC178x/7x variants, it lacks USB Host and OTG capabilities - confirmed in Table 2 under the "USB" column, which lists only "D" (Device) for this part number. The integrated USB PHY and DMA controller are configured exclusively for peripheral operation.

How many GPIO pins are available on the LPC1774FBD144,551 in LQFP144 package?

The LPC1774FBD144,551 provides 109 GPIO pins in the LQFP144 package, as specified in Table 2 of the datasheet. This count excludes dedicated power, ground, reset, and crystal pins. All GPIOs are accessible via Ports 0–3 and support configurable pull-up/down resistors, open-drain mode, and Cortex-M3 bit-banding for atomic register manipulation.

Is the LPC1774FBD144,551 pin-compatible with the LPC23xx or LPC24xx families?

Yes, the LPC1774FBD144,551 features pin function compatibility with the LPC23xx and LPC24xx families, as stated in Section 1 "General description". However, this refers to functional mapping (e.g., UART0_TX on same pin), not full electrical or software drop-in replacement - differences in core architecture, memory map, and peripheral registers require firmware adaptation.

What analog peripherals are integrated into the LPC1774FBD144,551?

The LPC1774FBD144,551 integrates an 8-channel 12-bit ADC with up to 400 kHz conversion rate and a 10-bit DAC with dedicated conversion timer and GPDMA support. These are confirmed in Sections 2 and 4 of the datasheet. The ADC supports multiple result registers and DMA triggering, while the DAC provides buffered voltage output - both essential for sensor interfacing and analog actuator control.