NXP Semiconductors LPC1347FBD48,151

Overview

LPC1347FBD48,151 from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller designed for USB-enabled embedded control applications. It operates at up to 72 MHz, integrates 64 kB flash, 8 kB SRAM, 2 kB EEPROM, a full-speed USB 2.0 device controller with on-chip ROM driver library, and an 8-channel 12-bit ADC sampling at 500 kSamples/s. It targets USB audio devices, industrial control systems, and handheld scanners requiring low-power operation across –40 °C to +85 °C.

For engineers reviewing the LPC1347FBD48,151 datasheet, LPC1347FBD48,151 pinout, LPC1347FBD48,151 application, or LPC1347FBD48,151 equivalent, key selection criteria include its LQFP48 package with 40 GPIO pins, dual SSP interfaces, I²C-bus Fast-mode Plus (1 Mbit/s), and dedicated USB PLL - all validated for USB device firmware development, RS-485/ISO 7816 smart card interfacing, and deterministic real-time control.

Technical Context

The LPC1347FBD48,151 implements the ARM Cortex-M3 r2p1 core with Harvard architecture, 3-stage pipeline, and integrated NVIC supporting nested interrupts. Its clock system includes a 1–25 MHz crystal oscillator, 12 MHz ±1% IRC, programmable PLL for CPU and a second dedicated PLL for USB timing synchronization.

Digital peripherals include four general-purpose timers (two 32-bit, two 16-bit) with match/capture capability, a Windowed WatchDog Timer with internal low-power WDO, and GPIO with programmable glitch filtering on eight pins. Analog functionality centers on a single 12-bit ADC with eight inputs and hardware averaging support.

Key Specifications

Pinout & Package

LPC1347FBD48,151 is housed in a plastic low-profile quad flat package (LQFP48) with 48 leads, body size 7 × 7 × 1.4 mm (SOT313-2). The package provides 40 usable GPIO pins, including dedicated USB_DP/USB_DM, USB_VBUS, and USB_CONNECT signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1343FBD48 and LPC1769FBD100, the LPC1347FBD48,151 uniquely balances USB integration, compact LQFP48 footprint, and on-chip EEPROM - making it optimal for cost-constrained, USB-centric embedded devices where firmware update reliability and sensor calibration persistence are critical.

Availability

LPC1347FBD48,151 is available at Aetrix Electronics and suitable for USB audio devices, industrial RS-485 nodes, handheld scanners, medical sensor hubs, and consumer peripherals requiring stable component supply across extended product lifecycles.

Supply support for LPC1347FBD48,151 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 markets, with leadership in ARM-based microcontrollers and NFC technologies.

The LPC1300 series was engineered for USB-native embedded control - prioritizing low-power operation, integrated USB device stacks, and robust mixed-signal peripherals to accelerate development of portable and industrial USB peripherals.

FAQ

What is the maximum operating frequency of the LPC1347FBD48,151?

The LPC1347FBD48,151 operates at a maximum CPU frequency of 72 MHz, achieved using either the internal 12 MHz IRC oscillator (trimmed to ±1 % accuracy) or an external crystal (1–25 MHz) with the integrated PLL. This frequency is sustained across the full industrial temperature range (–40 °C to +85 °C) and supply voltage (2.0 V to 3.6 V).

Does the LPC1347FBD48,151 include on-chip EEPROM, and how is it accessed?

Yes, the LPC1347FBD48,151 integrates 2 kB of on-chip EEPROM memory. It is accessed via an on-chip API located in the 16 kB boot ROM, enabling wear-leveling and atomic write operations without external components. This EEPROM is distinct from flash and supports 100,000 write cycles, ideal for storing calibration data or device-specific configuration.

How does the USB functionality of the LPC1347FBD48,151 differ from standard USB-capable MCUs?

The LPC1347FBD48,151 includes a full-speed USB 2.0 device controller with a complete ROM-resident USB device stack - including descriptor handling, endpoint management, and class drivers (e.g., HID, CDC). Unlike MCUs requiring external PHY or software-only stacks, the LPC1347FBD48,151 needs only passive termination and achieves USB compliance with minimal firmware overhead.

Can the LPC1347FBD48,151 support RS-485 communication, and which peripheral handles it?

Yes, the LPC1347FBD48,151 supports RS-485 communication through its USART peripheral, which includes explicit hardware support for RS-485/EIA-485 mode with automatic direction control (DE/RE signaling) and synchronous operation. The USART also supports 9-bit frame format and fractional baud rate generation for precise timing across variable cable lengths and noise environments.

What debug interfaces are supported by the LPC1347FBD48,151, and are they accessible in the LQFP48 package?

The LPC1347FBD48,151 supports both Serial Wire Debug (SWD) and JTAG interfaces, with all required debug pins (SWCLK, SWDIO, RESET, and optional TDI/TMS/TDO/TRST) available on the LQFP48 package. SWD is the recommended interface due to its 2-pin footprint and full debug capability, while JTAG remains available for boundary scan testing and legacy tool compatibility.