NXP Semiconductors LPC1115FET48/303EL

Overview

LPC1115FET48/303 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in TFBGA48 package, operating up to 50 MHz with 64 kB flash, 8 kB SRAM, and integrated peripherals including UART, I²C-Fast+, dual SPI, 10-bit ADC (8-channel), and four timers. It targets cost-sensitive embedded control in metering, lighting, and alarm systems.

For engineers reviewing the LPC1115FET48/303 datasheet, LPC1115FET48/303 pinout, LPC1115FET48/303 application, or LPC1115FET48/303 equivalent, key selection factors include its LPC1100XL series power profiles, windowed watchdog timer, configurable open-drain GPIO, and TFBGA48 footprint for space-constrained PCBs.

Technical Context

The LPC1115FET48/303 implements an ARM Cortex-M0 core with NVIC and Serial Wire Debug, supporting deterministic real-time execution at up to 50 MHz. Its clock system integrates a 12 MHz ±1% internal RC oscillator, crystal oscillator (1–25 MHz), PLL, and programmable watchdog oscillator (9.4 kHz–2.3 MHz).

Peripherals include one RS-485-capable UART with fractional baud rate generation, one I²C-bus interface compliant with Fast-mode Plus (1 Mbit/s), two SPI controllers with FIFO and multi-protocol support, four general-purpose timers (two 32-bit, two 16-bit), and a 10-bit ADC with 8 input channels multiplexed across GPIO pins.

Key Specifications

Pinout & Package

TFBGA48 package: plastic thin fine-pitch ball grid array with 48 solder balls, body size 4.5 mm × 4.5 mm × 0.7 mm, operating temperature range −40 °C to +85 °C (industrial grade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1114FBD48/303, the LPC1115FET48/303 delivers 100% more flash for feature-rich firmware and field upgrades, while LPC1343FHN33/01N introduces architectural complexity and USB overhead unsuitable for pure cost-optimized control tasks.

Availability

LPC1115FET48/303 is available at Aetrix Electronics and suitable for smart metering, LED lighting control, and home security alarm systems requiring stable component supply and long lifecycle support.

Supply support for LPC1115FET48/303 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The LPC111x family was designed as a low-cost, low-power 32-bit replacement for legacy 8/16-bit MCUs, targeting high-volume embedded applications where code density, energy efficiency, and ease of migration matter most.

FAQ

What is the maximum operating frequency of the LPC1115FET48/303?

The LPC1115FET48/303 operates at a maximum CPU frequency of 50 MHz. This is achieved using the on-chip PLL driven by either the internal 12 MHz RC oscillator or an external crystal (1–25 MHz). The 50 MHz clock enables deterministic real-time execution for time-critical tasks such as motor commutation and sensor sampling without external clock components.

Does the LPC1115FET48/303 support I²C Fast-mode Plus?

Yes, the LPC1115FET48/303 supports I²C Fast-mode Plus with a data rate of up to 1 Mbit/s. Its I²C-bus interface includes multiple address recognition, monitor mode, and high-current sink drivers (20 mA) on SCL/SDA pins - enabling direct drive of Fast-mode Plus buses without external buffers or level shifters.

What is the ADC resolution and channel count on the LPC1115FET48/303?

The LPC1115FET48/303 integrates a 10-bit successive approximation ADC with 8 input channels (AD0–AD7). All 8 channels are accessible on the TFBGA48 package, allowing simultaneous monitoring of multiple analog signals such as temperature, voltage rails, and current sense outputs in compact industrial designs.

How does the windowed watchdog timer (WWDT) differ from a standard WDT in the LPC1115FET48/303?

The LPC1115FET48/303 features a windowed watchdog timer (WWDT) that requires service only within a defined time window - not just before timeout. This prevents premature or delayed refreshes caused by runaway code or timing faults. Unlike standard WDTs, the WWDT adds a second timing boundary, significantly improving reliability in safety-critical applications like alarm panels and metering.

Is the LPC1115FET48/303 pin-compatible with other LPC111x variants in TFBGA48?

No - the LPC1115FET48/303 shares the TFBGA48 package with LPC1115JET48/303 but is not pin-compatible with earlier LPC111x TFBGA variants (e.g., LPC1113/LPC1114 in TFBGA), as those do not exist per official ordering tables. Only LQFP48 and HVQFN33 packages appear across multiple LPC111x members; TFBGA48 is exclusive to LPC1115 variants.