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NXP Semiconductors LPC11U34FHN33/311,
- Part No.:
- LPC11U34FHN33/311,
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 32-VQFN Exposed Pad
- Datasheet:
-
LPC11U34FHN33/311,.pdf
- Description:
- IC MCU 32BIT 40KB FLASH 32HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,732
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Product details
Overview
LPC11U34FHN33/311 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller in HVQFN33 package, operating at up to 50 MHz with 40 kB flash, 8 kB SRAM, 4 kB EEPROM, USB 2.0 full-speed device controller, and 10-bit ADC. It targets embedded USB-peripheral applications requiring low-power operation and compact footprint.
For engineers reviewing the LPC11U34FHN33/311 datasheet, LPC11U34FHN33/311 pinout, LPC11U34FHN33/311 application, or LPC11U34FHN33/311 equivalent, this page delivers verified specifications, validated pin functions for the HVQFN33 variant, real-world use cases in consumer peripherals and medical devices, and two confirmed alternative parts with documented technical differences.
Technical Context
The LPC11U34FHN33/311 implements an ARM Cortex-M0 core with NVIC and system tick timer, paired with dedicated USB PLL and main PLL for independent clock domain management. Its memory subsystem integrates 40 kB flash (sector/page-erasable), 4 kB byte-programmable EEPROM, and 8 kB SRAM - all accessible via AHB-Lite bus.
Peripheral integration includes one USART supporting RS-485, smart card (ISO 7816-3), and synchronous mode; two SSP controllers; Fast-mode Plus I²C-bus (1 Mbit/s); eight-channel 10-bit ADC; four timers (two 16-bit, two 32-bit); and GPIO with configurable pull-up/pull-down, repeater, and open-drain modes across 26 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, up to 50 MHz - enables deterministic real-time control with Thumb-2 instruction set and low gate count. |
| Flash Memory | 40 kB, sector (4 kB) and page (256 B) erase - supports robust firmware updates and field reprogramming. |
| EEPROM | 4 kB, byte-erasable and byte-programmable - provides nonvolatile data storage without external EEPROM chip. |
| SRAM | 8 kB - sufficient for USB descriptor handling, ISR stacks, and real-time buffering in peripheral applications. |
| USB Interface | Full-speed (12 Mbps) device controller with ROM-based drivers - eliminates USB stack memory overhead and enables flashless enumeration. |
| ADC | 10-bit, 8-channel - supports analog sensor interfacing (e.g., temperature, battery voltage) with hardware multiplexing. |
| GPIO Pins | 26 configurable I/O pins in HVQFN33 - includes 8 interrupt-capable inputs and high-current sink (20 mA) on true open-drain pins. |
Pinout & Package
HVQFN33 package: plastic thermal enhanced very thin quad flat package, no leads, 33 terminals, body size 7 × 7 × 0.85 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET/PIO0_0 | Reset input / GPIO | External reset with 20 ns glitch filter; also debug select (LOW = JTAG, HIGH = SWD). |
| PIO0_1/CLKOUT/CT32B0_MAT2/USB_FTOGGLE | Clock output / Timer match / USB SOF | Provides 1 ms Start-of-Frame signal for USB host sync; configurable as timer output or clock source. |
| PIO0_3/USB_VBUS | USB VBUS monitor | Detects USB bus presence to trigger device enumeration or power management state transitions. |
| PIO0_4/SCL & PIO0_5/SDA | I²C-bus interface | Open-drain pins supporting Fast-mode Plus (1 Mbit/s); enable direct connection to I²C sensors without external pull-ups. |
| PIO0_18/RXD & PIO0_19/TXD | USART receive/transmit | Support asynchronous UART, RS-485 half-duplex, and synchronous mode with SCLK on PIO0_17. |
| USB_DP & USB_DM | USB differential pair | Full-speed USB 2.0 physical layer interface compliant with USB specification; requires 1.5 kΩ SoftConnect resistor on USB_CONNECT (PIO0_6). |
| PIO0_23/AD7 | ADC input channel 7 | One of eight 10-bit ADC inputs; shares pin with GPIO and supports internal reference or external VREF. |
Key Features
| Feature | Design Value |
|---|---|
| ROM-based USB drivers | Reduces flash usage by ~4 kB and guarantees USB enumeration reliability without firmware driver porting effort. |
| Byte-programmable EEPROM | Enables secure, wear-leveling-free storage of calibration data, serial numbers, or user settings without external memory. |
| Programmable Windowed Watchdog Timer (WWDT) | Prevents runaway code with time-windowed refresh requirement, enhancing safety-critical system robustness. |
| Four low-power modes (Sleep to Deep power-down) | Supports sub-μA current draw in Deep power-down with wake-up via GPIO or USB activity - ideal for battery-powered USB peripherals. |
| High-current sink (20 mA) on true open-drain pins | Drives LEDs or small relays directly without external drivers, simplifying BOM and PCB layout. |
Applications
| USB Audio Adapters | Medical Sensor Interfaces |
|---|---|
Use Scenario: Compact USB audio dongle converting analog microphone/headphone signals to digital USB audio class (UAC1/UAC2). IC Role / Device Role / Timing Role: MCU handles USB audio descriptor negotiation, sample rate conversion, and real-time buffer management between ADC/DAC and USB endpoints. Use Value: Integrated 10-bit ADC and USB device controller eliminate external codec and PHY, reducing BoM cost and board area by >30%. |
Use Scenario: Portable pulse oximeter or glucose meter transmitting sensor readings over USB to host PC or mobile device. IC Role / Device Role / Timing Role: Manages analog front-end conditioning, ADC sampling, USB HID report generation, and battery monitoring. Use Value: 4 kB EEPROM stores factory calibration coefficients and patient history; USB enumeration occurs in <100 ms due to ROM-based drivers. |
| Industrial Handheld Scanners | Consumer Peripheral Controllers |
Use Scenario: Battery-powered barcode scanner using CMOS image sensor and USB CDC for data transmission to POS systems. IC Role / Device Role / Timing Role: Coordinates image capture timing, UART communication with sensor, and USB bulk transfer of decoded barcodes. Use Value: 26 GPIO pins support direct LED/laser driver control and button matrix scanning; Deep-sleep mode extends battery life to >12 hours. |
Use Scenario: USB HID keyboard/mouse controller with RGB LED feedback and touchpad interface. IC Role / Device Role / Timing Role: Processes key scan matrix, runs USB HID descriptor, manages RGB PWM outputs, and handles USB suspend/resume. Use Value: High-current sink capability drives RGB LEDs directly; 50 MHz CPU ensures zero-latency HID report generation at 125 Hz polling rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC11U34FBD48/311 | Same core, flash, RAM, and peripherals but in LQFP48 package with 40 GPIO pins. | Requires larger PCB footprint and supports more complex I/O routing (e.g., dual SSP, extra timers). | Select when additional GPIO or LQFP assembly compatibility is required; not pin-compatible with HVQFN33. |
| LPC11U35FHN33/401 | Upgraded to 64 kB flash and 10 kB total SRAM (8+2 kB), same HVQFN33 package and pinout. | Supports larger firmware images (e.g., USB composite devices) without changing PCB layout. | Drop-in replacement for firmware scalability; identical pinout and mechanical fit - suitable for design migration. |
Compared with LPC11U34FHN33/311, the LPC11U35FHN33/401 offers 24 kB more flash and 2 kB additional SRAM while maintaining identical HVQFN33 packaging and pin assignment, enabling seamless firmware growth; the LPC11U34FBD48/311 provides 14 more GPIOs but requires PCB redesign due to different package and pin count.
Availability
LPC11U34FHN33/311 is available at Aetrix Electronics and suitable for consumer peripherals, medical sensor interfaces, and industrial handheld scanners requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for LPC11U34FHN33/311 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The LPC11U3x product line was designed specifically for cost-sensitive, USB-connected embedded applications where low power, small form factor, and integrated USB device functionality are critical - targeting replacements for legacy 8/16-bit MCUs.
FAQ
What is the maximum operating frequency of the LPC11U34FHN33/311?
The LPC11U34FHN33/311 operates at a maximum CPU frequency of 50 MHz, achieved using either the internal 12 MHz IRC oscillator with PLL multiplication or an external crystal (1–25 MHz) with PLL. This frequency is fully supported across its specified temperature range of −40 °C to +85 °C and supply voltage of 1.8 V to 3.6 V.
Does the LPC11U34FHN33/311 include USB device firmware in ROM?
Yes, the LPC11U34FHN33/311 includes ROM-based USB device drivers that support full-speed (12 Mbps) enumeration and standard class descriptors. This allows the LPC11U34FHN33/311 to implement USB HID, CDC, or MSC devices without allocating flash memory for USB stack code, reducing firmware footprint and improving reliability.
How many ADC channels does the LPC11U34FHN33/311 support, and what is the resolution?
The LPC11U34FHN33/311 integrates a 10-bit successive approximation ADC with eight input channels (AD0–AD7), mapped to specific GPIO pins including PIO0_11, PIO0_12, PIO0_13, PIO0_14, PIO0_15, PIO0_16, PIO0_22, and PIO0_23. Conversion is software- or timer-triggered with configurable sample rates.
Is the LPC11U34FHN33/311 pin-compatible with other LPC11U3x variants in HVQFN33 package?
Yes, the LPC11U34FHN33/311 shares identical pinout and package dimensions (HVQFN33, 7×7×0.85 mm) with LPC11U34FHN33/421, LPC11U35FHN33/401, and LPC11U35FHI33/501. All share the same 33-pin mapping per Figure 2 of the datasheet, enabling PCB reuse across these variants where flash/SRAM requirements align.
What power-saving modes are supported by the LPC11U34FHN33/311?
The LPC11U34FHN33/311 supports four reduced-power modes: Sleep, Deep-sleep, Power-down, and Deep power-down. In Deep power-down mode, current consumption drops to sub-μA levels, with wake-up possible via dedicated WAKEUP pin (PIO0_16), GPIO interrupts, watchdog timeout, or USB activity - making it suitable for battery-operated USB peripherals.
LPC11U34FHN33/311, Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 32-VQFN Exposed Pad
- 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:
- 26
- 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:
LPC11U34FHN33/311, FAQ
1.How can I place an order for LPC11U34FHN33/311, through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC11U34FHN33/311, 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 LPC11U34FHN33/311, reliable?
The price and inventory of LPC11U34FHN33/311, are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC11U34FHN33/311, is usually 5 days.
3.What payment methods are accepted for LPC11U34FHN33/311,?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC11U34FHN33/311, transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC11U34FHN33/311,?
LPC11U34FHN33/311, orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC11U34FHN33/311, 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 LPC11U34FHN33/311,?
For technical support, including LPC11U34FHN33/311, datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC11U34FHN33/311, requirements.
6.How does Aetrix verify that LPC11U34FHN33/311, is sourced from the original manufacturer or authorized distributors?
All LPC11U34FHN33/311, 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 LPC11U34FHN33/311, meets industry standards.
7.What is the process for return or replacement of LPC11U34FHN33/311,?
All LPC11U34FHN33/311, units undergo pre-shipment inspection (PSI). If there is an issue with LPC11U34FHN33/311,, 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 LPC11U34FHN33/311, part is unused and in its original packaging.
Return procedure for LPC11U34FHN33/311,:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPC11U34FHN33/311, Tags
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ATTINY4-TSHR
Microchip Technology
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ATTINY402-SSNR
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PIC16F15213T-I/MF
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PIC16F15213-E/MF
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PIC10F200T-I/OT
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