PIC16LF1503-I/ST - 8-bit MCU, 3.5KB Flash, 10-bit ADC | Microchip
N.º de pieza: PIC16LF1503-I/ST ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.32 | $1,32 |
| 10 | $1.18 | $11,80 |
| 100 | $1.05 | $105,00 |
| 500 | $0.92 | $460,00 |
| 1.000 | $0.79 | $790,00 |
PIC16LF1503-I/ST Descripción general
An 8-bit microcontroller is a small computer-on-a-chip that combines a CPU, non-volatile program memory (Flash), volatile data memory (RAM), and configurable peripherals on a single die. PIC microcontrollers use a Harvard architecture with separate program and data buses and a RISC-style instruction set, mapping to the broader category hierarchy of: microcontroller -> embedded processor -> semiconductor device. The "LF" prefix indicates the low-voltage Flash family optimized for battery-powered applications, sitting alongside the PIC16F (full-voltage) and PIC16HV (high-voltage) variants in Microchip's mid-range 8-bit portfolio.
Key features of the PIC16LF1503-I/ST include an internal 16 MHz oscillator with 4x PLL option for 16 MIPS throughput, 10-bit ADC with acquisition time as low as 1.5 microseconds, four 8-bit timers plus one 16-bit timer, enhanced PWM with up to 4 channels, an I2C/SPI/EUSART configurable serial interface, and on-board 31 kHz low-power oscillator for sleep-mode timing. The CLC peripheral allows glue logic implementation in silicon, reducing external component count.
The architecture uses a 14-bit instruction word with a 15-deep hardware stack, enabling robust interrupt handling and modular C code development using Microchip's MPLAB X IDE and XC8 compiler. The internal voltage reference and temperature indicator channels support sensor trimming without external components. Sleep current is rated at a few tens of nA typical, making the part suitable for energy-harvesting and battery-backed designs.
Typical applications include LED lighting controllers with CWG-driven dimming, low-cost consumer appliances, sensor nodes with on-chip ADC, battery-powered IoT edge devices, and small motor or fan controllers. The TSSOP-14 footprint enables integration into space-constrained handheld products where the 12 available I/O pins suffice for the application.
When designing with this device, plan I/O usage carefully: TSSOP-14 has only 12 usable I/O (RA0-RA4, RC0-RC5 minus VDD/VSS), so multiplex peripherals early. Always configure the unused pins as outputs to minimize quiescent current. For ADC accuracy, add a 100 nF decoupling capacitor close to VDD and use the internal voltage reference for ratiometric measurements.
This page synthesizes distributor pricing, drop-in package alternatives, design notes, and selection guidance not found in the manufacturer datasheet alone.
Alternativas directas para PIC16LF1503-I/ST — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC16LF1503-I/ST (mismo factor de forma y huella) — difiere en Operating Temperature, Timers, Package, Program Memory (Flash), Instruction Set.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC16LF1503T-I/ST
✅ Sustitución directa✓ En stock
$0.55 / unidad
Ver hoja de datos →PIC16LF1503-E/ST
✅ Sustitución directa✓ En stock
$1.05 / unidad
Ver hoja de datos →PIC16F1503-I/ST
✅ Sustitución directa✓ En stock
$0.94 / unidad
Ver hoja de datos →PIC16LF1503-I/ST Valores máximos y características eléctricas
| Architecture | 8-bit PIC mid-range (Harvard) |
| Instruction Set | 14-bit, 49 instructions |
| Program Memory (Flash) | 3.5 KB (2048 words x 14-bit) |
| Data Memory (RAM) | 128 B |
| EEPROM | Not specified (use Flash for non-volatile data) |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| Frecuencia de reloj máxima | 20 MHz (16 MIPS with 4x PLL) |
| I/O Pins | 12 |
| ADC | 10-bit, up to 8 channels |
| Timers | 4 x 8-bit + 1 x 16-bit |
| PWM Channels | Up to 4 (10-bit) |
| Communication Peripherals | I2C, SPI, EUSART (configurable) |
| Special Peripherals | CLC, CWG, NCO |
| Internal Oscillator | 16 MHz with 4x PLL + 31 kHz LF |
| Encapsulado | TSSOP-14 (ST) |
| Temperatura de funcionamiento | -40 C to +85 C (Industrial) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Brown-out Reset (BOR) | Yes (configurable) |
Configuración de pines de PIC16LF1503-I/ST
| Pin 1 | RA3/MCLR — Digital I/O / Master Clear reset input (active low) |
| Pin 2 | RA4/AN3/OSC2 — Digital I/O / Analog input 3 / Oscillator output |
| Pin 3 | RA5/AN4/OSC1 — Digital I/O / Analog input 4 / Oscillator input |
| Pin 4 | VSS — Ground reference |
| Pin 5 | RC0/AN8 — Digital I/O / Analog input 8 |
| Pin 6 | RC1/AN9 — Digital I/O / Analog input 9 |
| Pin 7 | RC2/AN10 — Digital I/O / Analog input 10 |
| Pin 8 | RC3/AN11 — Digital I/O / Analog input 11 |
| Pin 9 | RC4 — Digital I/O |
| Pin 10 | RC5 — Digital I/O |
| Pin 11 | VDD — Positive supply (1.8V to 3.6V) |
| Pin 12 | RA0/AN0 — Digital I/O / Analog input 0 |
| Pin 13 | RA1/AN1 — Digital I/O / Analog input 1 |
| Pin 14 | RA2/AN2 — Digital I/O / Analog input 2 |
Aplicaciones típicas
PIC16LF1503-I/ST es adecuado para 6 aplicacións: LED Lighting Controller, Battery-Powered IoT Sensor Node, Consumer Appliance Control, Small Motor / Fan Speed Controller, Capacitive Touch Keypad, Compact UART-to-SPI Bridge.
LED Lighting Controller
The PIC16LF1503-I/ST excels in LED lighting controller designs where the integrated Complementary Waveform Generator (CWG) produces dead-band-controlled complementary PWM outputs for half-bridge LED drivers. Its 10-bit ADC with up to 8 channels supports color temperature and ambient light sensing, while the CLC peripheral allows pulse-skipping dimming logic to be implemented in silicon without external gates. The 1.8V to 3.6V operating range matches single-cell Li-Ion and dual-alkaline supply rails typical in portable lighting. With sleep current in the nA range, battery-powered fixtures can run months between cell replacements. The TSSOP-14 footprint fits inside MR16 bulbs and tape-light strip modules where PCB area is constrained. Engineers use the 16 MHz internal oscillator with 4x PLL to drive the CWG at 16 MIPS for smooth high-frequency PWM without external crystals.
Recomendado
Battery-Powered IoT Sensor Node
The PIC16LF1503-I/ST is well-suited for low-cost IoT sensor nodes transmitting via SPI-connected LoRa or BLE modules. Its 1.8V to 3.6V VDD range allows direct connection to single 18650 Li-Ion cells or 2xAA alkaline packs, while the 10-bit ADC reads environmental sensors (temperature, humidity, gas) with 50 ksps throughput. The EUSART and MSSP peripherals share pins to support either UART or SPI master mode, enabling flexible radio module selection. Sleep current below 1 microamp (with Watchdog Timer) preserves battery for multi-year deployments. The 3.5 KB Flash accommodates sensor fusion routines and over-the-air update stubs, while the CLC peripheral offloads interrupt-driven logic from the CPU to reduce wake-up latency. TSSOP-14 footprint fits inside IP65 sealed enclosures.
Recomendado
Consumer Appliance Control
For consumer appliance control boards (coffee makers, blenders, slow cookers), the PIC16LF1503-I/ST provides capacitive touch sensing via the 10-bit ADC, PWM control of heating elements through the CWG peripheral, and rotary encoder input on interrupt-on-change pins. The 16 MIPS core runs proportional-integral control loops with millisecond response. The TSSOP-14 package survives the high-temperature reflow profiles typical in white-goods manufacturing. Brown-out reset and watchdog timer provide robustness against brown-out conditions common with inductive motor loads. According to the Microchip datasheet 40001607D, the device is rated for industrial temperature operation (-40C to +85C), accommodating under-cabinet kitchen environments.
Recomendado
Small Motor / Fan Speed Controller
The PIC16LF1503-I/ST drives 3-phase brushless DC fans and small DC motor control loops via its enhanced PWM and CWG peripherals. With up to 4 PWM channels at 10-bit resolution, the device can generate complementary drive signals for half-bridges, while the ADC samples back-EMF for sensorless commutation. Operating at 16 MIPS, the CPU executes field-oriented control (FOC) math for fractional-horsepower motors. The wide 1.8V to 3.6V range accommodates USB-powered and battery-powered fans, while the CLC peripheral integrates zero-crossing detection for TRIAC dimming of AC fan motors. TSSOP-14 fits compact inline fan controllers.
Recomendado
Capacitive Touch Keypad
The PIC16LF1503-I/ST implements up to 12 capacitive touch buttons using the 10-bit ADC with mTouch firmware library. The 16 MIPS core runs the touch decoding algorithm in real time with sub-10 ms response, while the 12 I/O pins provide direct connection to a 3x4 button matrix. The CLC peripheral generates wake-up interrupts only on touch events, preserving sleep current at sub-microamp levels for battery-powered remote controls. The TSSOP-14 footprint fits behind thin glass overlays in appliance front panels. According to Microchip mTouch documentation, charge-time measurement delivers robust touch detection through 5 mm acrylic overlays.
Recomendado
Compact UART-to-SPI Bridge
The PIC16LF1503-I/ST serves as a low-cost protocol bridge converting UART commands from a host processor into SPI commands for sensor peripherals. The EUSART handles UART at up to 1 Mbps while MSSP drives SPI at the same rate. The 3.5 KB Flash accommodates command parsing state machines, and the CLC peripheral offloads timing-critical CS toggling. Operating from 1.8V to 3.6V allows direct logic-level translation with modern low-voltage processors. TSSOP-14 fits inside cable dongles and breakout boards where PCB area is minimal.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC16LF1503-I/ST — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC16LF1503T-I/ST | PIC16LF1503-E/ST | PIC16F1503-I/ST | PIC16LF1503-I/SL | PIC16LF1503-I/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TSSOP-14 (ST) | TSSOP-14 (ST) - same | TSSOP-14 (ST) - same | TSSOP-14 (ST) - same | SOIC-14 (SL) - wider footprint | VQFN-14 (MV) - smaller footprint |
| Operating Voltage (VDD) | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V (5V capable) | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Program Memory (Flash) | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB |
| Maximum Clock Frequency | 20 MHz (16 MIPS) | 20 MHz (16 MIPS) | 20 MHz (16 MIPS) | 20 MHz (16 MIPS) | 20 MHz (16 MIPS) | 20 MHz (16 MIPS) |
| ADC | 10-bit, up to 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels |
| Special Peripherals (CLC/CWG/NCO) | Yes (all three) | Yes (all three) | Yes (all three) | Yes (all three) | Yes (all three) | Yes (all three) |
Diferenciadores clave
- Lowest voltage operation in PIC16F1503 family at 1.8 V to 3.6 V (frente a PIC16F1503-I/ST)
- Industrial temperature grade at lower cost than extended grade (frente a PIC16LF1503-E/ST)
- Compact TSSOP-14 footprint with 40 percent PCB area savings (frente a PIC16LF1503-I/SL)
Notas de diseño
The PIC16LF1503-I/ST draws approximately 1.4 mA active at 3.3V and 16 MHz, dropping to sub-1 microamp in sleep with Watchdog Timer enabled. Estimated: power budget for a coin-cell (CR2032, 220 mAh) sensor node running 1 percent duty cycle is approximately 5 years. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a 10 microfarad bulk capacitor if the supply impedance exceeds 1 ohm at high frequencies.
Pin 1 (RA3/MCLR) must be pulled to VDD through a 10 kohm resistor for normal operation; leaving it floating triggers continuous reset. Keep the ICSP clock and data traces short (under 50 mm) and isolated from switching power traces to avoid programming failures. The TSSOP-14 thermal pad is not present; thermal dissipation is via the 14 pins only, so the device does not require thermal management at typical 8-bit MCU current consumption (under 30 mA).
Do not exceed the absolute maximum VDD of 4.0V or the LF variant will suffer permanent damage. Configure unused I/O pins as outputs driving low to minimize current consumption; inputs left floating can draw tens of microamps each. The internal 16 MHz oscillator requires the PLL configuration bit set in CONFIG1 register - if missing, the device runs at 4 MHz and peripherals may malfunction. Always clear the GIE bit before modifying interrupt-sensitive registers to avoid race conditions.
Información de cumplimiento
RoHS compliant per Microchip product page. Industrial temperature grade (I suffix) - not AEC-Q100 qualified; choose PIC16LF1503-E/ST for extended temperature applications. Conflict minerals compliance per Microchip policy.
