NXP Semiconductors LPC1345FBD48,151

Overview

LPC1345FBD48,151 from NXP Semiconductors is a 32-bit ARM Cortex-M3 microcontroller designed for USB-connected embedded systems, featuring 32 kB flash, 8 kB SRAM, 2 kB EEPROM, full-speed USB 2.0 device controller with on-chip ROM driver library, and an 8-channel 12-bit ADC sampling at up to 500 kSamples/s - deployed in USB audio devices and industrial control interfaces.

For engineers reviewing the LPC1345FBD48,151 datasheet, LPC1345FBD48,151 pinout, LPC1345FBD48,151 application, or LPC1345FBD48,151 equivalent, key selection criteria include USB device stack support in boot ROM, 40 GPIO pins in LQFP48 package, dual SSP interfaces, I²C Fast-mode Plus (1 Mbit/s), and wake-up capability from Deep power-down via dedicated WAKEUP pin (PIO0_16).

Technical Context

The LPC1345FBD48,151 implements an ARM Cortex-M3 r2p1 core with Harvard architecture, 3-stage pipeline, and integrated NVIC for deterministic interrupt handling. It supports two independent PLLs: one for CPU clocking (up to 72 MHz) and a dedicated USB PLL for precise 48 MHz timing - critical for jitter-sensitive USB audio endpoints.

Its peripheral set includes a programmable Windowed Watchdog Timer (WWDT) with internal low-power WatchDog Oscillator (WDO), four general-purpose timers (two 16-bit, two 32-bit) with capture/match functionality, and a fractional baud rate generator in the USART supporting RS-485/ISO 7816 smart card modes - enabling robust fieldbus and secure peripheral interfacing.

Key Specifications

Pinout & Package

LQFP48 package (SOT313-2), 7 × 7 × 1.4 mm body, 48 leads - compatible with standard PCB assembly processes and thermal management for industrial ambient conditions (−40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1345FBD48,151, LPC1347FBD48 adds USB OTG and doubles flash capacity without changing footprint, while LPC1343FBD48 removes USB entirely to reduce unit cost - both retain identical GPIO count, ADC, and timer resources for seamless migration paths.

Availability

LPC1345FBD48,151 is available at Aetrix Electronics and suitable for USB audio devices, industrial RS-485 gateways, medical sensor hubs, and handheld barcode scanners requiring stable component supply across extended product lifecycles.

Supply support for LPC1345FBD48,151 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications - delivering high-integration MCUs with robust ecosystem support.

The LPC1300 series targets cost-effective, USB-enabled embedded control - designed for applications demanding low power, rich analog/digital peripherals, and certified USB device functionality without external components.

FAQ

Does LPC1345FBD48,151 support USB device enumeration without external firmware stack?

Yes. The LPC1345FBD48,151 includes a 16 kB boot ROM containing a certified USB device stack API. This allows full USB enumeration and class-compliant operation (e.g., HID, CDC, audio) using only the on-chip ROM driver - no external USB PHY or firmware stack is required. The LPC1345FBD48,151 leverages this to reduce BOM cost and accelerate time-to-market for USB peripherals.

What is the maximum ADC sampling rate achievable on LPC1345FBD48,151?

The LPC1345FBD48,151 features an 8-channel, 12-bit ADC capable of up to 500 kSamples/s under optimal conditions - achieved with single-channel continuous conversion and minimal setup overhead. This rate supports real-time sensor monitoring in medical and industrial applications. The LPC1345FBD48,151 ADC includes programmable sample time and burst mode for synchronized multi-channel acquisition.

Can LPC1345FBD48,151 operate in Deep power-down mode and wake via USB activity?

Yes. The LPC1345FBD48,151 supports wake-up from Deep power-down mode via USB port activity (VBUS detection or USB reset), in addition to GPIO and dedicated WAKEUP pin (PIO0_16). This enables ultra-low-power USB suspend/resume behavior - critical for battery-powered peripherals that must remain responsive to host connection. The LPC1345FBD48,151 integrates PMU logic to manage power state transitions automatically.

Is the I²C interface on LPC1345FBD48,151 compliant with Fast-mode Plus (1 Mbit/s)?

Yes. The LPC1345FBD48,151's I²C-bus interface fully supports Fast-mode Plus (1 Mbit/s) with multiple address recognition and monitor mode - verified in the official NXP datasheet Rev. 3. This allows high-speed communication with modern sensors and EEPROMs while maintaining backward compatibility with standard 400 kbit/s devices. The LPC1345FBD48,151 achieves this using configurable slew-rate control and high-current sink drivers on SCL/SDA pins.

How many GPIO pins are available on LPC1345FBD48,151 in the LQFP48 package?

The LPC1345FBD48,151 provides 40 general-purpose I/O pins in its LQFP48 package - confirmed in Table 2 of the NXP datasheet. These include 8 pins with programmable glitch filters, 8 configurable as edge/level-sensitive interrupts, and two with high-current drive (20 mA sink on P0_4/P0_5, 20 mA source on P0_7). All GPIOs support pull-up/pull-down, repeater mode, and pseudo open-drain operation - making the LPC1345FBD48,151 suitable for direct interface with diverse peripherals.