NXP Semiconductors LPC2103FHN48,551

Overview

LPC2103FHN48,551 from NXP Semiconductors is a 32-bit ARM7TDMI-S microcontroller in HVQFN48 package with 32 kB flash, 8 kB SRAM, 10-bit 8-channel ADC, dual UARTs (one with full modem interface), two Fast I²C buses (400 kbit/s), SPI/SSP, and 32 fast 5 V-tolerant GPIO pins. It targets compact industrial control, medical instrumentation, and protocol conversion gateways requiring low power and high peripheral integration.

For engineers reviewing the LPC2103FHN48,551 datasheet, LPC2103FHN48,551 pinout, LPC2103FHN48,551 application, or LPC2103FHN48,551 equivalent, key selection criteria include its 70 MHz CPU clock via on-chip PLL, deep power-down mode with RTC retention (Rev. A+), ISP/IAP capability, vectored interrupt controller with configurable priorities, and 10 µs ADC conversion time per channel - all validated for embedded systems with space and thermal constraints.

Technical Context

The LPC2103FHN48,551 implements the ARM7TDMI-S core with dual instruction sets (32-bit ARM and 16-bit Thumb), enabling up to 30 % higher performance in ARM mode versus Thumb for critical ISR/DSP code while retaining 65 % code density. Its 128-bit wide memory interface and accelerator architecture support full-speed 70 MHz execution from on-chip flash.

Peripheral integration includes two 32-bit timers (7 capture/7 compare channels), two 16-bit timers (3 capture/7 compare), RTC with independent 32 kHz clock input and VBAT supply, and a pin connect block enabling dynamic multiplexing of all P0.x pins across GPIO, UART, I²C, SPI, SSP, PWM, capture, and JTAG functions - with hardware glitch filtering on ADC-capable pins.

Key Specifications

Pinout & Package

HVQFN48 package: plastic thermal-enhanced very thin quad flat no-lead, 7 × 7 × 0.85 mm body, 48 terminals, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LPC2103FHN48,551, the LPC2103FBD48 offers identical functionality in a more manufacturable package but with higher thermal resistance, while the LPC2106FBD64 expands capabilities at the cost of compatibility - making LPC2103FHN48,551 optimal for size- and power-sensitive designs where USB or extended memory are unnecessary.

Availability

LPC2103FHN48,551 is available at Aetrix Electronics and suitable for industrial motor control, medical vital sign monitoring, smart energy gateways, and automated test equipment requiring stable component supply and long-term lifecycle assurance.

Supply support for LPC2103FHN48,551 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, with headquarters in Eindhoven, Netherlands.

The LPC2100 series was designed for cost-sensitive, space-constrained embedded systems requiring high peripheral integration, low power consumption, and ARM7 real-time performance - targeting industrial automation, medical devices, and protocol translation.

FAQ

What is the maximum operating frequency of the LPC2103FHN48,551?

The LPC2103FHN48,551 achieves a maximum CPU clock frequency of 70 MHz using its on-chip PLL, which accepts an input crystal frequency between 10 MHz and 25 MHz and settles in 100 µs. This frequency is sustained across the full −40 °C to +85 °C temperature range when powered with stable 3.3 V and 1.8 V supplies. The 128-bit memory interface ensures zero-wait-state execution at this speed.

Does the LPC2103FHN48,551 support in-system programming (ISP)?

Yes, the LPC2103FHN48,551 supports full in-system programming via its on-chip bootloader, accessible through UART0. It enables sector-by-sector or full-chip flash erase in 100 ms and 256-byte programming in 1 ms. This capability allows field firmware updates without removing the device from the PCB, and is fully supported by NXP's Flash Magic and lpc21isp tools.

How many analog inputs does the 10-bit ADC support on the LPC2103FHN48,551?

The LPC2103FHN48,551 integrates a single 10-bit successive approximation ADC with eight analog input channels (AD0.0 through AD0.7), each mapped to dedicated GPIO pins (P0.22–P0.26, P0.10–P0.12). Conversion time is as low as 2.44 µs per channel, and each channel has its own result register to avoid interrupt latency bottlenecks during burst sampling.

Is the LPC2103FHN48,551 pin-compatible with other members of the LPC210x family?

The LPC2103FHN48,551 shares identical pinout and electrical characteristics with LPC2102FHN48 and LPC2101FHN48 in the HVQFN48 package, differing only in flash (32 kB), RAM (8 kB), and ADC channel count (8 inputs). All three use the same SOT619-7 footprint and pin function mapping, enabling hardware reuse across variants with only firmware adjustments.

What debug interface does the LPC2103FHN48,551 provide?

The LPC2103FHN48,551 features a JTAG debug interface compliant with IEEE 1149.1, supporting EmbeddedICE-RT real-time debugging via standard tools like Keil µVision and Segger J-Link. Pins P0.27–P0.31 serve as TRST, TMS, TCK, TDI, and TDO when DBGSEL is pulled high at reset, enabling non-intrusive breakpoint setting, memory inspection, and trace without halting program flow.