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NXP Semiconductors LPC11U34FBD48/311,
- Part No.:
- LPC11U34FBD48/311,
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LPC11U34FBD48/311,.pdf
- Description:
- IC MCU 32BIT 40KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:234
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Product details
Overview
LPC11U34FBD48/311 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in LQFP48 package, operating at up to 50 MHz with 40 kB flash, 8 kB SRAM, and 4 kB EEPROM. It integrates USB 2.0 full-speed device controller, one USART with RS-485/smart card support, two SSP interfaces, Fast-mode Plus I²C, 10-bit ADC (8 channels), and 40 GPIO pins - deployed in USB-connected medical sensors and industrial control edge nodes.
For engineers reviewing the LPC11U34FBD48/311 datasheet, LPC11U34FBD48/311 pinout, LPC11U34FBD48/311 application, or LPC11U34FBD48/311 equivalent, key selection criteria include USB device stack readiness, EEPROM retention for calibration data, USART synchronous mode for legacy protocol bridging, and 40-pin LQFP footprint compatibility with cost-sensitive PCB layouts.
Technical Context
The LPC11U34FBD48/311 implements a single-core ARM Cortex-M0 CPU with NVIC and system tick timer, paired with dedicated USB PLL and main PLL for independent clock domain management. Its memory subsystem includes on-chip boot ROM (16 kB) with USB drivers and integer division routines, enabling firmware updates over USB without external host intervention.
Peripheral integration centers on low-overhead connectivity: the USART supports fractional baud rate generation, internal FIFO, full modem handshake, and ISO 7816-3 smart card interface; the I²C-bus achieves 1 Mbit/s Fast-mode Plus operation with multi-address recognition and monitor mode - all configurable via IOCON registers per pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 32-bit, up to 50 MHz - delivers deterministic real-time response with Thumb-2 instruction set and <100 ns interrupt latency. |
| Memory | 40 kB flash (sector/page erase), 8 kB SRAM, 4 kB EEPROM (byte-erasable) - enables field-upgradable firmware and nonvolatile parameter storage without external components. |
| USB Interface | Full-speed USB 2.0 device controller with ROM-based drivers - eliminates USB stack licensing, supports SoftConnect via PIO0_6, and enables HID/class-compliant device deployment. |
| Serial Peripherals | 1 × USART (RS-485/9-bit/smart card), 2 × SSP (SPI/I²S), 1 × I²C-bus (Fast-mode Plus, 1 Mbit/s) - provides simultaneous wired protocol bridging for sensor aggregation and industrial bus interfacing. |
| Analog & Timing | 10-bit ADC (8 inputs), four general-purpose timers (up to 13 match outputs), programmable WWDT - supports analog sensor acquisition, PWM generation, and fail-safe timeout monitoring in safety-critical functions. |
| I/O & Power | 40 GPIO pins (configurable pull-up/down/open-drain), 1.8–3.6 V supply, -40 °C to +85 °C - ensures robust operation in battery-powered handheld scanners and industrial ambient conditions. |
Pinout & Package
LQFP48 package (7 × 7 × 1.4 mm, SOT313-2); 48-pin quad flat leaded outline with exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET/PIO0_0 | Reset input / GPIO | External reset with 20 ns glitch filter; also selects JTAG vs SWD debug mode during power-up - critical for production programming and debug access control. |
| USB_DP / USB_DM | USB differential pair | Full-speed USB 2.0 physical layer interface; requires 27 Ω series termination and 1.5 kΩ SoftConnect resistor controlled by PIO0_6 - enables plug-and-play enumeration without hardware switches. |
| PIO0_18/RXD / PIO0_19/TXD | USART receive/transmit | Primary UART interface supporting asynchronous ISP, RS-485 half-duplex, and synchronous master/slave modes - used for bootloader communication and legacy device integration. |
| PIO0_4/SCL / PIO0_5/SDA | I²C-bus clock/data | Open-drain I²C interface with Fast-mode Plus capability (1 Mbit/s); high-current sink enabled via IOCON register - drives longer traces or multiple slave devices without external buffers. |
| PIO0_16/AD5 / PIO0_23/AD7 | ADC input channels | Two of eight 10-bit ADC inputs; share same voltage reference (VREFP/VREFN) - suitable for calibrated temperature or voltage monitoring with <±2 LSB INL. |
Key Features
| Feature | Design Value |
|---|---|
| ROM-based USB drivers | Eliminates external USB stack memory footprint and licensing; enables certified HID, CDC, or MSC class compliance with minimal firmware overhead. |
| In-Application Programming (IAP) | Allows secure firmware updates from running application using on-chip bootloader - essential for remote maintenance of deployed medical or industrial devices. |
| EEPROM with byte-level erasure | Stores calibration coefficients, device IDs, or usage counters with >100k write cycles and 20-year data retention - avoids external serial EEPROM BOM cost. |
| Programmable Windowed Watchdog Timer (WWDT) | Prevents runaway code execution with time-windowed refresh requirement; uses dedicated low-power WDO oscillator - improves reliability in unattended embedded systems. |
| Configurable GPIO with repeater mode | Enables level-shifting or signal conditioning directly in pin logic; reduces need for external translators in mixed-voltage designs (e.g., 3.3 V MCU ↔ 5 V sensor). |
Applications
| USB Audio Peripheral | Industrial Sensor Node |
|---|---|
Use Scenario: Compact USB headset with microphone preamp and volume control. IC Role / Device Role / Timing Role: Main MCU handling USB audio class enumeration, ADC sampling of mic signal, and DAC output via PWM+filter. Use Value: Integrated 4 kB EEPROM stores user EQ profiles; USB device controller enables zero-driver installation on Windows/macOS/Linux. |
Use Scenario: DIN-rail mounted temperature/humidity sensor with RS-485 Modbus RTU output. IC Role / Device Role / Timing Role: Data acquisition controller reading analog sensors, performing linearization, and transmitting via USART in RS-485 half-duplex mode. Use Value: 40 GPIO pins support isolated RS-485 transceiver control; 10-bit ADC meets ±0.5 °C accuracy requirements without external precision references. |
| Handheld Barcode Scanner | Medical Diagnostic Tool |
Use Scenario: Battery-powered scanner decoding 1D/2D barcodes and streaming results over USB HID. IC Role / Device Role / Timing Role: Image capture processor (via GPIO-timed LED strobe), barcode decode engine, and USB HID report generator. Use Value: 50 MHz Cortex-M0 executes lightweight decode algorithms in <10 ms; USB_FTOGGLE (PIO0_1) synchronizes frame timing with host polling. |
Use Scenario: Portable ECG front-end with analog filtering, lead-off detection, and USB data streaming. IC Role / Device Role / Timing Role: Analog signal conditioner, 10-bit ADC sampler (2 kHz), and USB CDC virtual COM port transmitter. Use Value: On-chip 4 kB EEPROM retains patient calibration offsets; brownout detect with four thresholds prevents corrupted measurements during battery sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC11U34FHN33/311 | HVQFN33 package (33-pin), 26 GPIO, no CT32B0_CAP1 or CT32B1_CAP1 - reduced I/O count and timer capture capability. | Suitable for space-constrained USB peripherals where fewer analog inputs or timer functions are needed. | Select when board area is critical and full 40-GPIO capability is unnecessary; verify pin mapping for existing LQFP48 layout reuse. |
| LPC11U35FBD48/401 | 64 kB flash, 10 kB total SRAM (8 kB + 2 kB USB SRAM), identical pinout and peripheral set - higher memory capacity only. | Required for larger USB class implementations (e.g., composite HID+MSC) or extended firmware feature sets. | Choose when firmware size exceeds 40 kB or USB buffer requirements demand dedicated USB SRAM; drop-in replacement with no hardware change. |
Compared with LPC11U34FBD48/311, the LPC11U34FHN33/311 trades I/O and timer flexibility for smaller footprint, while the LPC11U35FBD48/401 extends memory headroom without altering interface behavior - enabling scalable design evolution within the same LQFP48 mechanical envelope.
Availability
LPC11U34FBD48/311 is available at Aetrix Electronics and suitable for USB-connected medical diagnostics, industrial sensor nodes, and handheld barcode scanners requiring stable component supply across multi-year production cycles.
Supply support for LPC11U34FBD48/311 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with core expertise in ARM-based microcontrollers and wireless technologies.
The LPC11U3x product line targets cost-sensitive, USB-enabled embedded systems requiring low-power operation, integrated nonvolatile memory, and rapid time-to-market - emphasizing USB device readiness and field-upgradability.
FAQ
Does LPC11U34FBD48/311 support USB device enumeration without external crystal?
Yes. The LPC11U34FBD48/311 includes a 12 MHz internal RC oscillator (IRC) qualified for USB full-speed operation, eliminating the need for an external crystal in many USB device applications. The IRC is factory-trimmed to ±1 % accuracy, meeting USB specification requirements for device enumeration and data transfer. This capability is confirmed in Section 2.2 of the LPC11U3x datasheet Rev. 2.5.
What is the maximum number of ADC channels usable simultaneously on LPC11U34FBD48/311?
The LPC11U34FBD48/311 features a single 10-bit ADC with 8 input channels (AD0–AD7), but it does not support true simultaneous sampling. Channels are multiplexed sequentially under software or hardware trigger control, with conversion time of 1.0 µs per sample at maximum clock rate. All 8 channels are accessible on the LQFP48 package, with AD0–AD5 on PIO0 and AD6–AD7 on PIO0_22/PIO0_23.
Can LPC11U34FBD48/311 operate in deep power-down mode with RTC functionality retained?
No. The LPC11U34FBD48/311 does not integrate a real-time clock (RTC) peripheral. In Deep power-down mode, all clocks and RAM contents are lost; only the wake-up pin (PIO0_16/WAKEUP) and brownout detector remain active. Timekeeping must be implemented externally or deferred to wake-up events - unlike higher-tier LPC11U3x variants that lack RTC even in other low-power modes.
Is the I²C-bus interface on LPC11U34FBD48/311 compatible with standard 400 kbit/s I²C devices?
Yes. The I²C-bus interface on LPC11U34FBD48/311 fully complies with the standard I²C-bus specification and supports Standard-mode (100 kbit/s), Fast-mode (400 kbit/s), and Fast-mode Plus (1 Mbit/s). Pull-up resistors must be configured externally, and the open-drain pins PIO0_4/SCL and PIO0_5/SDA support high-current sinking when Fast-mode Plus is enabled in the IOCON register.
Does LPC11U34FBD48/311 include hardware cryptographic acceleration?
No. The LPC11U34FBD48/311 does not contain dedicated cryptographic engines (e.g., AES, SHA, or RSA accelerators). Security relies on software-implemented algorithms or external secure elements. Its security features are limited to unique device serial number, brownout detection with forced reset, and memory protection via NVIC region-based access control - consistent with its entry-level positioning in the LPC11U3x family.
LPC11U34FBD48/311, Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- LPC11Uxx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, Microwire, SmartCard, SPI, SSP, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, POR, WDT
- Number of I/O:
- 40
- Program Memory Size:
- 40KB (40K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC11U34FBD48/311, FAQ
1.How can I place an order for LPC11U34FBD48/311, through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC11U34FBD48/311, on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LPC11U34FBD48/311, reliable?
The price and inventory of LPC11U34FBD48/311, are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC11U34FBD48/311, is usually 5 days.
3.What payment methods are accepted for LPC11U34FBD48/311,?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC11U34FBD48/311, transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC11U34FBD48/311,?
LPC11U34FBD48/311, orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC11U34FBD48/311, order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LPC11U34FBD48/311,?
For technical support, including LPC11U34FBD48/311, datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC11U34FBD48/311, requirements.
6.How does Aetrix verify that LPC11U34FBD48/311, is sourced from the original manufacturer or authorized distributors?
All LPC11U34FBD48/311, products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LPC11U34FBD48/311, meets industry standards.
7.What is the process for return or replacement of LPC11U34FBD48/311,?
All LPC11U34FBD48/311, units undergo pre-shipment inspection (PSI). If there is an issue with LPC11U34FBD48/311,, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LPC11U34FBD48/311, part is unused and in its original packaging.
Return procedure for LPC11U34FBD48/311,:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPC11U34FBD48/311, Tags
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ATTINY4-TSHR
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