NXP Semiconductors LPC1115FET48/303151

Overview

LPC1115FET48/303151 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, one UART with RS-485 support, one I²C-bus interface (Fast-mode Plus, 1 Mbit/s), two SPI controllers, four timers, and a 10-bit ADC-designed for low-power industrial control and smart metering applications.

For engineers reviewing the LPC1115FET48/303151 datasheet, LPC1115FET48/303151 pinout, LPC1115FET48/303151 application, or LPC1115FET48/303151 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for embedded design and BOM optimization.

Technical Context

The LPC1115FET48/303151 belongs to the LPC1100XL series, featuring a windowed watchdog timer (WWDT), power profiles in boot ROM for runtime power/performance tuning, and configurable open-drain GPIO mode. It supports fractional baud rate generation in UART and dual SPI with FIFO and multi-protocol capability.

Its clock system includes a 12 MHz internal RC oscillator trimmed to ±1 %, crystal oscillator (1–25 MHz), programmable watchdog oscillator (9.4 kHz–2.3 MHz), and PLL enabling full 50 MHz CPU operation from low-frequency sources. The device operates from a single 1.8 V–3.6 V supply and supports Sleep, Deep-sleep, and Deep power-down modes.

Key Specifications

Pinout & Package

TFBGA48 package: plastic thin fine-pitch ball grid array, 48 solder balls, body size 4.5 mm × 4.5 mm × 0.7 mm, intended for space-constrained PCB layouts requiring high I/O density and thermal efficiency.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1114FBD48/333 and LPC11U14FBD48/303, the LPC1115FET48/303151 uniquely combines TFBGA48 miniaturization, 64 kB flash headroom, WWDT, and boot-ROM power profiles-making it optimal for space-constrained, safety-aware, and battery-backed designs where runtime adaptability matters.

Availability

LPC1115FET48/303151 is available at Aetrix Electronics and suitable for smart metering, industrial control panels, LED lighting drivers, security alarm systems, and white goods requiring stable component supply across extended temperature ranges (−40 °C to +85 °C).

Supply support for LPC1115FET48/303151 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 LPC1100XL series-including LPC1115FET48/303151-is engineered for cost-sensitive, low-power embedded control applications demanding robustness, code density, and simplified power management in compact form factors.

FAQ

What is the maximum operating frequency of the LPC1115FET48/303151?

The LPC1115FET48/303151 operates at a maximum CPU frequency of 50 MHz, enabled by its integrated PLL that accepts input from either the internal 12 MHz RC oscillator (±1 % accuracy) or an external crystal (1–25 MHz). This frequency is sustained across the full industrial temperature range (−40 °C to +85 °C) and supply voltage range (1.8 V–3.6 V), as confirmed in the official NXP datasheet Rev. 9.2.

Does the LPC1115FET48/303151 support hardware-based RS-485 communication?

Yes, the LPC1115FET48/303151 UART includes built-in RS-485 support with automatic direction control logic. It generates the DE (driver enable) signal internally based on transmit activity, eliminating the need for external GPIO toggling or discrete logic. This feature is explicitly documented in Section 2 ("Features and benefits") and Figure 2 (block diagram) of the datasheet.

How many ADC channels does the LPC1115FET48/303151 provide, and what is their resolution?

The LPC1115FET48/303151 integrates a single 10-bit successive approximation ADC with multiplexing across up to eight input channels (AD[7:0]), all accessible on the TFBGA48 package. Channel count depends on package: TFBGA48 supports the full 8-channel configuration, as confirmed in Table 2 and Figure 5 (pin configuration) of the datasheet.

Is the LPC1115FET48/303151 pin-compatible with other LPC11xx devices in TFBGA48?

No-LPC1115FET48/303151 is not pin-compatible with earlier LPC11xx TFBGA48 variants such as LPC1114FET48/303. While both use the same 48-ball footprint, pin functions differ significantly (e.g., ADC channel allocation, timer match/capture assignments, and peripheral routing). Pin compatibility is only guaranteed within identical type numbers; cross-package substitution requires full schematic and layout review.

What debug interface does the LPC1115FET48/303151 support, and what pins are required?

The LPC1115FET48/303151 supports Serial Wire Debug (SWD) using two dedicated pins: SWDIO (ball A4) and SWCLK (ball D4). These pins are multiplexed with GPIO and timer functions but default to debug mode on reset. No JTAG interface is implemented-SWD is the sole debug transport, consistent with all LPC1100XL series devices per Section 2 and Figure 2 of the datasheet.