NXP Semiconductors LPC1115FBD48/303,1

Overview

LPC1115FBD48/303 from NXP Semiconductors is an ARM Cortex-M0 32-bit microcontroller in LQFP48 package, operating up to 50 MHz with 64 kB flash, 8 kB SRAM, and integrated peripherals including UART with RS-485 support, two SPI interfaces, Fast-mode Plus I²C (1 Mbit/s), 10-bit ADC (8-channel), four timers, and 42 GPIO pins. It targets cost-sensitive embedded control applications such as smart lighting and industrial sensor nodes.

For engineers reviewing the LPC1115FBD48/303 datasheet, LPC1115FBD48/303 pinout, LPC1115FBD48/303 application, or LPC1115FBD48/303 equivalent, key selection criteria include its LPC1100XL series power profiles, windowed watchdog timer, configurable open-drain GPIO mode, and full 42-pin I/O availability in LQFP48 - critical for board-level signal routing and low-power system design.

Technical Context

The LPC1115FBD48/303 implements the ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and Serial Wire Debug (SWD), enabling deterministic real-time response and streamlined firmware development. Its clock system integrates a 12 MHz ±1% internal RC oscillator, crystal oscillator (1–25 MHz), programmable watchdog oscillator (9.4 kHz–2.3 MHz), and PLL for CPU operation at maximum frequency without external high-frequency crystals.

Power management includes Sleep, Deep-sleep, and Deep power-down modes managed by an integrated PMU, with wake-up capability via up to 13 functional pins. The LPC1100XL series-specific features - power profiles in boot ROM, windowed WDT, and page erase (256-byte) - are confirmed active on this variant and directly accessible via API calls for application-tuned energy optimization.

Key Specifications

Pinout & Package

LQFP48 package: plastic low-profile quad flat package, 48 leads, body size 7 × 7 × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant, thermal performance suitable for convection-cooled industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC1114FBD48/303, the LPC1115FBD48/303 provides 32 kB additional flash for larger protocol stacks or field-upgradeable firmware, while maintaining identical power profiles, WWDT, and GPIO count; versus LPC1343FBD48, it trades USB and higher CPU performance for lower cost, lower power, and enhanced reliability features like windowed watchdog and ROM-based power tuning.

Availability

LPC1115FBD48/303 is available at Aetrix Electronics and suitable for smart lighting control, industrial sensor nodes, home alarm panels, and white goods motor control requiring stable component supply across production lifecycles.

Supply support for LPC1115FBD48/303 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 LPC1100XL series - including LPC1115FBD48/303 - was designed for cost-optimized, low-power embedded control in appliances, lighting, and security systems, emphasizing robustness, ease of certification, and long-term supply stability.

FAQ

What is the maximum operating frequency of the LPC1115FBD48/303?

The LPC1115FBD48/303 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 real-time processing of communication protocols and control algorithms while maintaining low dynamic power consumption typical of the ARM Cortex-M0 architecture.

Does the LPC1115FBD48/303 support RS-485 communication?

Yes, the LPC1115FBD48/303 supports RS-485 communication through its UART peripheral, which includes hardware features for RS-485/EIA-485 operation such as fractional baud rate generation, internal FIFO, and dedicated control signals (DTR, RTS, CTS). When paired with an external RS-485 transceiver, the LPC1115FBD48/303 can implement robust half-duplex or full-duplex industrial networks without additional logic.

What package type and pin count does the LPC1115FBD48/303 use?

The LPC1115FBD48/303 uses the LQFP48 package: a plastic low-profile quad flat package with 48 leads, body dimensions of 7 × 7 × 1.4 mm, and 0.5 mm lead pitch. This package provides full access to all 42 GPIO pins, dual SPI, Fast-mode Plus I²C, UART, and ADC channels - making it the highest I/O-count option in the LPC111x family.

Is the LPC1115FBD48/303 compatible with the LPC1114FBD48/303 at the hardware level?

Yes, the LPC1115FBD48/303 is pin-compatible and electrically identical to the LPC1114FBD48/303 in LQFP48 package, differing only in flash memory size (64 kB vs. 32 kB). All peripherals, GPIO functions, power characteristics, and timing parameters match exactly - enabling direct PCB reuse and firmware migration with only linker script and flash programming adjustments.

What power-saving features are unique to the LPC1115FBD48/303 within the LPC111x family?

The LPC1115FBD48/303 belongs to the LPC1100XL series and includes power profiles stored in boot ROM - callable via single API - and a windowed watchdog timer (WWDT). These features are absent in base LPC1100 and LPC1100L variants. The WWDT enforces strict timing windows for refresh, enhancing system reliability in safety-critical applications, while the power profiles simplify achieving optimal trade-offs between wake-up latency and sleep current.