LPC1342FBD48,151 - 72MHz Cortex-M3 MCU, 16KB Flash | NXP
MPN: LPC1342FBD48,151 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.23 | $2.23 |
| 10 | $2.05 | $20.50 |
| 100 | $1.86 | $186.00 |
| 500 | $1.69 | $845.00 |
| 1,000 | $1.54 | $1,540.00 |
LPC1342FBD48,151 Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and programmable peripherals on one die, sitting at the center of the embedded systems hierarchy that spans from simple 8-bit MCUs to application processors. The LPC1342 belongs to the low-power LPC13xx family of Cortex-M3 microcontrollers designed for embedded applications requiring a high level of integration and low power consumption.
Key features include the ARM Cortex-M3 core with integrated NVIC and hardware divide, USB Device connectivity as a headline peripheral, up to 16 kB flash with in-system programming, and one Fast-mode Plus (Fm+) I2C interface. These combine to deliver USB-enabled designs at a very low bill-of-material cost.
Technically, the Cortex-M3 architecture provides Thumb-2 instruction efficiency and deterministic interrupt handling through the nested vectored interrupt controller, while the LPC13xx memory architecture places flash and SRAM on an AHB-Lite bus matrix. The serial interfaces, including Fm+ I2C capable of driving 1 Mbit/s plus UART and SPI, support typical sensor and display stacks in compact footprints.
Typical applications include USB HID devices and USB bootloader-based products, blood pressure monitors and portable medical instruments, and consumer peripherals such as remote controls and lighting controllers, where 16 kB of code space and USB connectivity are sufficient.
Design consideration: budget the 16 kB flash carefully, as USB stack plus application typically consumes 8-12 kB; the larger-flash LPC1345/46/47 members share the same LQFP-48 footprint if headroom is needed.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for LPC1342FBD48,151 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LPC1342FBD48,151 (same form factor and footprint) — differing in Package, Flash Memory, Package Shape, SRAM, USB.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LPC1343FBD48,151
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.62 / Unit
View Datasheet →LPC1345FBD48,151
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.62 / Unit
View Datasheet →LPC1346FBD48,151
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LPC1347FBD48,151
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LPC1342FBD48,118
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
LPC1342FBD48,151 Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M3 |
| Core Size | 32-Bit |
| Maximum CPU Frequency | 72 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 4 KB |
| USB | USB Device |
| I2C | 1x Fast-mode Plus (Fm+) |
| Package | 48-LQFP (7x7 mm) |
| Number of Pins | 48 |
| Mounting Type | Surface Mount |
| Terminal Form | Gull Wing |
| Package Shape | Square (LFQFP) |
| Temperature Grade | Industrial |
LPC1342FBD48,151 square (lfqfp) Pin Configuration Guide
Pin configuration for LPC1342FBD48,151 (square (lfqfp) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for LPC1342FBD48,151.
Refer to the datasheet for full pin configuration.
Typical Applications
LPC1342FBD48,151 is suitable for 6 applications: USB HID Devices and Bootloader Products, Blood Pressure Monitor, USB Firmware Upgrade Bridges, Portable Consumer Electronics, Industrial Sensor Nodes, Educational and Hobbyist Cortex-M3 Development.
USB HID Devices and Bootloader Products
The LPC1342FBD48,151 fits USB HID dongles, custom keyboards, sensor bridges, and field-upgradable accessories because NXP positions USB Device as a key peripheral of the LPC13xx family. The 72 MHz Cortex-M3 core services the USB Device controller with interrupt latency low enough for full-speed 12 Mbit/s enumeration and interrupt transfers. In practice the part is used with an on-chip USB bootloader (USB MSC-style flashing), letting end users update firmware through a USB port with no external programmer, which reduces manufacturing and support cost. The 16 kB flash budget suits compact HID stacks; a typical HID + bootloader image fits in 8-12 kB, leaving modest room for application logic. If the application later needs more code space, the pin-compatible LPC1343FBD48 with 32 kB flash drops onto the same PCB footprint without redesign.
Recommended
Blood Pressure Monitor
NXP explicitly lists blood pressure monitors among LPC13xx reference applications: the MCU reads an inflatable air-bladder cuff via a pressure sensor, drives the pump and valve, and reports measurements over USB or a display. The LPC1342FBD48,151's 72 MHz Cortex-M3 core provides the arithmetic throughput for pressure-signal filtering and oscillometric algorithms, while its low power consumption suits battery-operated portable instruments. The Fast-mode Plus I2C interface communicates with pressure sensor and display drivers at up to 1 Mbit/s, and UART or SPI covers alternative sensor front-ends. Because the design is cost-sensitive and high-volume, the 16 kB flash of the LPC1342 keeps unit price low; NXP's published application guidance for this use case lets designers reuse validated firmware patterns. For richer UI or BLE additions, the pin-compatible LPC1345/46/47 members offer 32-64 kB of flash without a PCB respin.
Recommended
USB Firmware Upgrade Bridges
Products with a UART, SPI, or I2C-based main controller frequently add a small USB bridge for firmware updates, configuration, and data logging; the LPC1342FBD48,151 serves exactly this role. Its USB Device controller enumerates as HID, CDC, or mass-storage class, while the Fast-mode Plus I2C (1 Mbit/s), UART, and SPI ports talk to the target system. Running at 72 MHz, the Cortex-M3 core handles packet translation and flash-image buffering within the 4 kB SRAM for page-sized transfers. Because the part supports in-system programming via USB, the bridge itself is field-updatable, and the 48-LQFP (7x7 mm) package keeps the bridge section of the board under 49 mm2. Engineers should budget roughly 8-12 kB of flash for a full USB stack, leaving the remainder for bridge application logic; larger images fit the pin-identical LPC1343.
Recommended
Portable Consumer Electronics
Remote controls, lighting controllers, small appliances, and toy electronics benefit from the LPC1342FBD48,151's combination of 32-bit performance at entry-level cost. The 72 MHz Cortex-M3 executes control loops and button-debounce state machines with large margin compared with 8-bit parts at a similar price point, and its low power consumption extends battery life in handheld products. Peripherals cover the typical consumer stack: Fast-mode Plus I2C for touch keys and LED drivers, UART for wireless modules, and timers for PWM dimming or motor control. The 48-LQFP (7x7 mm) gull-wing package suits standard two-layer or four-layer SMT assembly with 0.5 mm pin pitch. Product planners should treat the 16 kB flash as a hard constraint for feature-rich firmware; the family's pin-compatible 32-64 kB members provide a growth path that preserves the existing PCB layout and toolchain.
Recommended
Industrial Sensor Nodes
The LPC1342FBD48,151's industrial temperature ordering grade and low power operation make it a candidate for compact industrial sensor nodes and actuators. The 72 MHz Cortex-M3 core performs ADC-sourced filtering and threshold logic, while the Fast-mode Plus I2C, UART, and SPI interfaces connect to sensor ICs, RS-485 transceivers, and local displays. GPIO and 32-bit timers support PWM outputs for valve or fan control. The gull-wing 48-LQFP (7x7 mm) terminal form withstands standard industrial reflow assembly, and the USB Device port enables commissioning and diagnostics from a laptop without special tooling - a practical benefit during installation and maintenance. Designers must verify the exact operating temperature range suffix on the ordering code against the installation environment. Where logging capacity or protocol stacks exceed 16 kB flash, the pin-compatible LPC1346/LPC1347 with 48/64 kB flash upgrade the node without layout changes.
Recommended
Educational and Hobbyist Cortex-M3 Development
The LPC1342FBD48,151 is popular in education and maker projects because NXP's LPC13xx family supports open-source toolchains (GCC-based arm-none-eabi, embedded platforms with LPC13xx support) and USB in-system programming removes the need for a hardware debug probe to load code. The 72 MHz ARM Cortex-M3 core runs the same Thumb-2 instruction set taught in university embedded courses, exposing the NVIC, SysTick, and bit-banding concepts students need to learn. With USB Device plus Fm+ I2C, UART, SPI, and timers, small boards can drive displays, sensors, and actuators. At roughly $2.23 per unit as of October 2026, the part is inexpensive enough for coursework and club projects, and the 48-LQFP footprint is hand-solderable with flux and drag-soldering technique. Project firmware that outgrows 16 kB ports directly to the identical-footprint LPC1343 with a single-line linker-script change.
Recommended
Recommended Products Summary
Engineering reference data for LPC1342FBD48,151 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LPC1343FBD48,151 | LPC1345FBD48,151 | LPC1346FBD48,151 | LPC1347FBD48,151 | LPC1342FBD48,118 |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Frequency | ARM Cortex-M3, 72 MHz | ARM Cortex-M3, 72 MHz | ARM Cortex-M3, 72 MHz | ARM Cortex-M3, 72 MHz | ARM Cortex-M3, 72 MHz | ARM Cortex-M3, 72 MHz |
| Flash Memory | 16 kB | 32 kB | 32 kB | 48 kB | 64 kB | 16 kB |
| USB | USB Device | USB Device | USB Device | USB Device | USB Device | USB Device |
| I2C Interface | 1x Fast-mode Plus (Fm+) | 1x Fast-mode Plus (Fm+) | Fast-mode Plus I2C | Fast-mode Plus I2C | Fast-mode Plus I2C | 1x Fast-mode Plus (Fm+) |
Key Differentiators
- Lowest flash in a pin-identical family (vs LPC1343FBD48,151)
- USB Device at entry-level price point (vs LPC1342FBD48,118)
- Flash growth path without PCB respin (vs LPC1347FBD48,151)
Design Notes
Estimated: budget the 3.3 V rail for the MCU core plus USB bus-powered operation. A USB bus-powered device must stay within the 100 mA unconfigured enumeration budget before requesting up to 500 mA, so total design current including LED drivers and sensors should be sized below the configured budget. Add 100 nF ceramic decoupling on each supply pin pair plus a bulk 4.7-10 uF capacitor near the LQFP-48; keep the USB VBUS sense/divider network per the family datasheet recommended circuit for reliable host enumeration.
The 0.5 mm pitch 48-LQFP requires careful fanout on two-layer boards: place the 100 nF decoupling capacitors on the component side within 2-3 mm of their supply pins and route power as short wide traces or a small pour. Reserve a 5-pin SWD header (SWDIO, SWCLK, VDD, GND, RESET) for flashing and debugging, since first-time programming before the USB bootloader is populated requires SWD access. Keep the 12 MHz crystal (per family clock scheme) within 10 mm of the MCU with guard ground.
The 16 kB flash is the most common design mistake on the LPC1342: a full USB stack plus application can exceed the budget, forcing a late migration. Compile early with the production toolchain and linker map to confirm headroom; if utilization exceeds ~12 kB, switch to the pin-identical LPC1343 (32 kB) before PCB release. Also confirm the ordering-suffix temperature grade (,151 vs ,118) at BOM time, and verify ISP/bootloader pin strapping (PIO0_1/PIO0_3 states at reset) so USB boot is entered as intended.
Compliance Information
Compliance declarations must be confirmed from the NXP product page and distributor certificates tied to the exact ordering code LPC1342FBD48,151; not stated in the provided verified data.