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NXP Semiconductors LPC1115FBD48/303EL
- Part No.:
- LPC1115FBD48/303EL
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LPC1115FBD48/303EL.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,762
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Product details
Overview
LPC1115FBD48/303 from NXP Semiconductors is an ARM Cortex-M0 32-bit microcontroller in LQFP48 package, delivering up to 50 MHz CPU operation, 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), and four general-purpose timers - deployed in industrial lighting control systems requiring deterministic real-time response and low-power operation.
For engineers reviewing the LPC1115FBD48/303 datasheet, LPC1115FBD48/303 pinout, LPC1115FBD48/303 application, or LPC1115FBD48/303 equivalent, this page delivers verified technical context, validated pin functions for LQFP48, power profile configuration details, windowed watchdog timer behavior, and direct alternative options for migration or second-sourcing in cost-sensitive embedded designs.
Technical Context
The LPC1115FBD48/303 belongs to the LPC1100XL series, featuring a windowed watchdog timer (WWDT), configurable open-drain GPIO mode, and power profiles stored in boot ROM for runtime optimization. It supports fractional baud rate generation in UART and dual SPI controllers with FIFO and multi-protocol capability.
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 full-speed CPU operation without external high-frequency crystals. The device operates across −40 °C to +85 °C with single 1.8–3.6 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 32-bit RISC, up to 50 MHz - enables efficient execution of real-time control tasks with Thumb-2 instruction set and NVIC interrupt handling. |
| Memory | 64 kB on-chip flash, 8 kB SRAM - sufficient for standalone firmware with bootloader, communication stacks, and sensor processing logic. |
| Analog Interface | 10-bit ADC with 8 input channels - supports simultaneous voltage/current monitoring in motor control or power metering applications. |
| Serial Interfaces | 1 UART (RS-485 capable), 2 SPI (SSP features), 1 I²C (Fast-mode Plus, 1 Mbit/s) - enables robust industrial bus connectivity with noise immunity and multi-drop support. |
| Timers & Control | Four general-purpose timers (two 32-bit, two 16-bit), 13 match outputs, 8 capture inputs - provides precise PWM generation, pulse counting, and time-stamped event capture. |
| GPIO & Power | 42 GPIO pins with configurable pull-up/pull-down and open-drain mode; Sleep/Deep-sleep/Deep power-down modes - reduces active current to µA range while retaining wake-up capability on 13 pins. |
| Package & Temp | LQFP48 (7 × 7 × 1.4 mm), −40 °C to +85 °C operating range - compatible with standard reflow processes and suitable for industrial ambient conditions. |
Pinout & Package
LQFP48 package: plastic low-profile quad flat package, 48 leads, body size 7 mm × 7 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET/PIO0_0 | Reset input / GPIO port 0 pin 0 | Active-low hardware reset; configurable as general-purpose input/output with interrupt capability. |
| XTALIN / XTALOUT | Crytal oscillator input / output | Supports 1–25 MHz crystal; optional external clock source or internal RC oscillator bypass. |
| SWDIO / PIO1_3 / AD4 / CT32B1_MAT2 | SWD debug I/O / ADC input / timer match | Multi-function pin enabling debug access, analog sensing, and timer-based waveform generation simultaneously. |
| PIO0_4 / SCL | I²C serial clock line | Open-drain output with internal pull-up; supports Fast-mode Plus (1 Mbit/s) timing and multi-master arbitration. |
| PIO0_5 / SDA | I²C serial data line | Open-drain bidirectional data line; compatible with standard and Fast-mode Plus I²C peripherals. |
| PIO1_6 / RXD / CT32B0_MAT0 | UART receive / timer match output | Asynchronous serial input with FIFO; also serves as match output for precise timing synchronization. |
| PIO1_7 / TXD / CT32B0_MAT1 | UART transmit / timer match output | Drives RS-485 transceiver enable via software-controlled match output; supports fractional baud rate generation. |
| VDD / VSS | Power supply / ground | Dual VDD pins (pins 13 & 37) and dual VSS pins (pins 14 & 38) ensure stable core and I/O rail decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Windowed Watchdog Timer (WWDT) | Prevents runaway code by requiring service within defined time window - critical for fail-safe operation in alarm systems and white goods. |
| Power Profiles in Boot ROM | Runtime-selectable performance/power trade-offs via single API call - eliminates manual register configuration for sleep mode transitions. |
| Configurable Open-Drain GPIO | Enables wired-AND logic, I²C bus sharing, and level translation without external components - reduces BOM count in mixed-voltage designs. |
| High-Current Sink on I²C Pins | 20 mA sink capability on SDA/SCL - drives longer bus traces or multiple slave devices without external buffers in industrial environments. |
| UART with RS-485 Support | Hardware DTR/RTS/CTS signaling and automatic direction control - simplifies half-duplex RS-485 interface design for building automation networks. |
| Two SPI Controllers with SSP | Independent FIFOs, clock polarity/phase control, and multi-protocol framing - supports simultaneous communication with display, flash memory, and sensor ICs. |
Applications
| Industrial Lighting Control | Smart Energy Metering |
|---|---|
|
Use Scenario: LED driver board managing dimming profiles, thermal feedback, and DALI/KNX gateway functions. IC Role / Device Role / Timing Role: Main controller executing PWM timing, ADC sampling of temperature/voltage, and UART-based DALI command parsing. Use Value: 50 MHz Cortex-M0 ensures sub-millisecond response to light-level changes; 64 kB flash accommodates DALI stack and calibration tables. |
Use Scenario: Residential electricity meter with tamper detection, harmonic analysis, and HAN communication. IC Role / Device Role / Timing Role: System-on-chip handling metrology ADC interface, RTC, secure firmware updates, and PLC/HPLC modem control. Use Value: Windowed WDT prevents malicious firmware lockup; 10-bit ADC with 8 channels enables simultaneous voltage, current, and neutral monitoring. |
| Home Security Panel | Appliance Motor Control |
|
Use Scenario: Battery-backed alarm panel interfacing PIR sensors, door contacts, siren drivers, and GSM module. IC Role / Device Role / Timing Role: Low-power coordinator managing wake-up events, sensor polling, and encrypted RF transmission scheduling. Use Value: Deep power-down mode draws <1 µA; wake-up on any of 13 GPIO pins enables instant intrusion detection without continuous polling. |
Use Scenario: BLDC motor controller in washing machine drum drive with current sensing and commutation timing. IC Role / Device Role / Timing Role: Real-time executor of FOC algorithms using timer match/capture for precise phase alignment and ADC for current feedback. Use Value: Four timers with 13 match outputs enable independent PWM generation for three phases plus auxiliary functions like buzzer and LED indicators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC1114FBD48/333 | 56 kB flash, same 8 kB SRAM, identical LQFP48 pinout and peripheral set - differs only in flash capacity and part number suffix. | Suitable where firmware image size exceeds 56 kB but remains under 64 kB; no hardware or layout change required. | Select when firmware growth approaches 56 kB limit and future-proofing against minor feature additions is needed. |
| LPC11U15FBD48/303 | Same package and pinout, adds USB 2.0 device controller, 12-bit ADC, and enhanced debug features - higher cost and power consumption. | Required only if native USB device functionality (e.g., firmware update over USB-CDC) is mandatory in end product. | Choose only when USB connectivity justifies added BOM cost and complexity; otherwise, LPC1115FBD48/303 offers optimal cost/performance balance. |
Compared with LPC1114FBD48/333, the LPC1115FBD48/303 provides 8 kB additional flash for larger protocol stacks or field-upgradable features; versus LPC11U15FBD48/303, it avoids USB-related silicon overhead and power draw, making it preferable for RS-485/I²C-only industrial nodes.
Availability
LPC1115FBD48/303 is available at Aetrix Electronics and suitable for industrial lighting control, smart energy metering, home security panels, and appliance motor control requiring stable component supply across extended 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The LPC1100XL series - including LPC1115FBD48/303 - was designed for cost-sensitive, low-power embedded control in appliances, lighting, and metering, emphasizing ease of use, robustness, 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. The 50 MHz clock feeds the ARM Cortex-M0 core, APB bus, and all peripheral modules, enabling deterministic real-time execution in applications such as motor control and lighting sequencing. The LPC1115FBD48/303 maintains full peripheral functionality at this speed.
Does the LPC1115FBD48/303 support RS-485 communication natively?
Yes, the LPC1115FBD48/303 UART supports RS-485 operation through hardware-assisted features including RTS/CTS flow control, DTR signaling, and automatic direction control via timer match outputs. Its UART implements fractional baud rate generation and internal FIFOs, allowing reliable half-duplex communication over noisy industrial lines. The LPC1115FBD48/303 does not include a built-in RS-485 transceiver, but its pinout and control logic are optimized for seamless interface with external transceivers like SN65HVD72.
How many ADC channels does the LPC1115FBD48/303 provide, and what is the resolution?
The LPC1115FBD48/303 integrates a 10-bit successive approximation ADC with multiplexing across up to 8 input channels (AD0–AD7), all accessible on the LQFP48 package. Conversion is triggered by software, timer match, or external event, with typical sampling rates up to 400 kSPS. The ADC supports burst mode for rapid sequential sampling and includes dedicated result registers per channel - essential for synchronized voltage and current measurement in power conversion systems using the LPC1115FBD48/303.
What power-saving modes are available on the LPC1115FBD48/303?
The LPC1115FBD48/303 offers three reduced-power modes: Sleep (CPU halted, peripherals active), Deep-sleep (CPU and most clocks stopped, SRAM retained), and Deep power-down (SRAM and registers powered down, wake-up only via dedicated pins or WWDT timeout). In Deep power-down, typical current consumption is below 1 µA. Wake-up from Deep-sleep is supported on up to 13 GPIO pins, and the WWDT can be configured to force wake-up or reset - making the LPC1115FBD48/303 ideal for battery-operated alarm sensors and remote meters.
Is the LPC1115FBD48/303 pin-compatible with other LPC11xx LQFP48 variants?
Yes, the LPC1115FBD48/303 shares identical LQFP48 pinout and electrical characteristics with all LPC11xx family members in the same package, including LPC1113FBD48/303, LPC1114FBD48/303, and LPC1114FBD48/333. Pin functions, power/ground locations, and debug interface (SWDIO/SWCLK) are fully aligned. Firmware compatibility depends on flash size and peripheral enablement - for example, code written for LPC1114FBD48/333 will run unmodified on LPC1115FBD48/303, leveraging the additional 8 kB flash space.
LPC1115FBD48/303EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- LPC1100XL
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, WDT
- Number of I/O:
- 42
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 8x10b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC1115FBD48/303EL FAQ
1.How can I place an order for LPC1115FBD48/303EL through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC1115FBD48/303EL 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 LPC1115FBD48/303EL reliable?
The price and inventory of LPC1115FBD48/303EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC1115FBD48/303EL is usually 5 days.
3.What payment methods are accepted for LPC1115FBD48/303EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC1115FBD48/303EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC1115FBD48/303EL?
LPC1115FBD48/303EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC1115FBD48/303EL 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 LPC1115FBD48/303EL?
For technical support, including LPC1115FBD48/303EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC1115FBD48/303EL requirements.
6.How does Aetrix verify that LPC1115FBD48/303EL is sourced from the original manufacturer or authorized distributors?
All LPC1115FBD48/303EL 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 LPC1115FBD48/303EL meets industry standards.
7.What is the process for return or replacement of LPC1115FBD48/303EL?
All LPC1115FBD48/303EL units undergo pre-shipment inspection (PSI). If there is an issue with LPC1115FBD48/303EL, 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 LPC1115FBD48/303EL part is unused and in its original packaging.
Return procedure for LPC1115FBD48/303EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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