PIC16LF1503-I/MV - 8-bit MCU, 3.5KB Flash, 20MHz, 16-UQFN
MPN: PIC16LF1503-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.81 | $0.81 |
| 10 | $0.74 | $7.40 |
| 100 | $0.66 | $66.00 |
| 500 | $0.59 | $295.00 |
| 1,000 | $0.52 | $520.00 |
PIC16LF1503-I/MV Overview
An 8-bit microcontroller (MCU) is a programmable system-on-chip that integrates a CPU, non-volatile program memory, RAM, and peripherals such as timers, communication interfaces, and ADCs onto a single silicon die. PIC microcontrollers use a modified Harvard RISC architecture where instructions and data are fetched on separate buses, enabling single-cycle instruction execution. The PIC16LF1503 belongs to the enhanced mid-range PIC16 family that adds data-memory support, deeper hardware stack, and configurable peripherals while keeping the cost and simplicity that made the PIC16 one of the most widely deployed 8-bit MCU architectures in the industry.
Key features of the PIC16LF1503-I/MV include 12 I/O pins with individually selectable weak pull-ups and interrupt-on-change, four Configurable Logic Cells (CLC) for hardware glue logic, a Complementary Waveform Generator (CWG), a Numerically Controlled Oscillator (NCO), and a 10-bit ADC with up to 11 channels. The device supports In-Circuit Serial Programming (ICSP) via two pins and offers Power-on Reset (POR), Power-up Timer (PWRT), Programmable Low-Power Brown-out Reset (LPBOR), and an extended Watchdog Timer (WDT) programmable from 1 ms to 256 seconds. These features allow the MCU to operate standalone in battery-powered and field-deployed systems with no external supervisor.
Architecturally, the PIC16LF1503 uses a 14-bit instruction word with a 16-level hardware stack with optional overflow/underflow reset, supporting up to 8K x 14 instruction space. Internal oscillator options up to 16MHz with a 4x PLL enable 16MHz and 20MHz operation without external crystals, simplifying BOM and reducing board area. Enhanced peripherals, including the CWG and NCO, move functions like waveform generation and precision frequency synthesis off the CPU core, lowering active-mode current and enabling deeper sleep modes for energy harvesting and IoT designs.
Typical applications include consumer appliances, security alarm panels, motor control (small BLDC drivers), building automation nodes, wearables, LED lighting control, and portable medical accessories. The wide operating voltage (1.8V-3.6V) and tiny 3x3 mm UQFN footprint make it a strong fit for space- and power-constrained designs.
When designing with the PIC16LF1503-I/MV, route the exposed thermal pad to a continuous ground plane and verify the supply decoupling network (typically 100 nF plus 1-10 uF bulk) is placed within a few millimeters of VDD. Use Microchip's MPLAB X IDE with XC8 compiler for code development and PICkit programmer for in-circuit debug.
This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical design notes not aggregated in the manufacturer datasheet, supporting faster sourcing decisions for engineers building with the PIC16LF1503-I/MV.
Drop-in alternatives for PIC16LF1503-I/MV — 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 PIC16LF1503-I/MV (same form factor and footprint) — differing in ADC, Package, Operating Temperature, Program Memory (Flash), Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1503T-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1503-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1503T-I/MV
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.48 / Unit
View Datasheet →PIC16LF1503-I/ST
✅ Drop-In✓ In Stock
$0.79 / Unit
View Datasheet →PIC16LF1503T-I/ST
✅ Drop-In✓ In Stock
$0.55 / Unit
View Datasheet →PIC16LF1503-I/MV Maximum Ratings & Electrical Characteristics
| Core | PIC16 (Enhanced Mid-Range) |
| Architecture | 8-bit RISC, modified Harvard |
| Instruction Word | 14-bit |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| RAM | 128 bytes |
| EEPROM | 0 bytes (none on this device) |
| CPU Speed | 20 MHz (up to 16 MHz internal + 4x PLL) |
| Operating Voltage (LF) | 1.8 V to 3.6 V |
| I/O Pins | 12 |
| ADC | 10-bit, up to 11 channels |
| Timers | Timer0, Timer1, Timer2 |
| Hardware Stack | 16 levels with overflow/underflow reset |
| Special Peripherals | CLC, CWG, NCO, EUSART |
| Package | 16-UQFN (3x3 mm) with exposed pad |
| Operating Temperature | -40 C to +85 C (industrial) |
| MSL Level | 1 per JEDEC J-STD-020 |
| RoHS Status | Compliant |
| Programming | ICSP (In-Circuit Serial Programming) |
PIC16LF1503-I/MV Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Pin 2 | RA5 — Bidirectional I/O with WKPU, IOC, analog channel |
| Pin 3 | RA4 — Bidirectional I/O with WKPU, IOC, analog channel |
| Pin 4 | RA3/MCLR — Bidirectional I/O or Master Clear (reset) input |
| Pin 5 | RA2 — Bidirectional I/O with WKPU, IOC, analog channel, CWG input |
| Pin 6 | RA1 — Bidirectional I/O with WKPU, IOC, analog channel, reference VREF+ |
| Pin 7 | RA0 — Bidirectional I/O with WKPU, IOC, analog channel |
| Pin 8 | RC5 — Bidirectional I/O |
| Pin 9 | RC4 — Bidirectional I/O |
| Pin 10 | RC3 — Bidirectional I/O |
| Pin 11 | RC2 — Bidirectional I/O |
| Pin 12 | RC1 — Bidirectional I/O |
| Pin 13 | RC0 — Bidirectional I/O |
| Pin 14 | RA7/OSC1 — Bidirectional I/O or crystal oscillator input |
| Pin 15 | RA6/OSC2 — Bidirectional I/O or crystal oscillator output |
| Pin 16 | VSS — Ground reference (also exposed thermal pad) |
Typical Applications
PIC16LF1503-I/MV is suitable for 7 applications: Security Alarm Panels, Small Motor Control (BLDC/Fan), Building Automation Nodes, Wearable Health Bands, LED Lighting Controllers, Consumer Appliance User Interface, Portable Medical Accessories.
Security Alarm Panels
The PIC16LF1503-I/MV fits security alarm panels thanks to its 3.5 KB flash, 128 B RAM, and integrated 10-bit ADC for monitoring sensor inputs (PIR, door contacts, glass-break detectors). The 12 I/O pins support keypad scanning, LED driving, and buzzer control without external glue logic. With 1.8 V minimum VDD, the MCU operates directly from battery backup during AC power loss, drawing microamps in sleep. The CWG and NCO peripherals simplify piezo sounder waveforms. Combined with the small 16-UQFN footprint, it enables slim wall-mount panel designs.
Recommended
Small Motor Control (BLDC/Fan)
The PIC16LF1503-I/MV is suitable for small brushless DC motor and fan control. The Complementary Waveform Generator (CWG) outputs complementary PWM signals with programmable dead-band, ideal for 3-phase BLDC commutation. The Numerically Controlled Oscillator (NCO) provides precision frequency synthesis for sensorless back-EMF detection. With 20 MHz CPU and 10-bit ADC for current sensing, the MCU closes a single-shunt FOC loop on small ceiling fans and pumps. The 16-UQFN exposed pad gives adequate thermal dissipation for H-bridge gate drive.
Recommended
Building Automation Nodes
The PIC16LF1503-I/MV serves building automation end nodes - smart thermostats, occupancy sensors, wireless HVAC valves - where its 1.8 V to 3.6 V supply range, low sleep current, and small 16-UQFN package are decisive. The 10-bit ADC handles thermistor or 4-20 mA current-loop sensor inputs, while the EUSART bridges to RS-485 transceivers or sub-GHz radios. Per the Microchip datasheet, the WDT programmable 1 ms to 256 s ensures robust unattended operation. Designers prefer this part for battery-powered wireless sensor nodes that must operate 5+ years on a single CR2032.
Recommended
Wearable Health Bands
The PIC16LF1503-I/MV is a fit for low-cost wearable health bands where a 3x3 mm footprint, sub-microamp sleep current, and integrated 10-bit ADC are critical. The four Configurable Logic Cells (CLC) implement hardware debouncing and pulse-edge detection off the CPU, lowering active duty cycle and extending battery life. Operating voltage 1.8 V minimum suits direct coin-cell connection. With 12 I/O pins, the MCU can drive an OLED segment display, an accelerometer I2C bus, and an optical heart-rate sensor in a single chip design.
Recommended
LED Lighting Controllers
The PIC16LF1503-I/MV suits LED lighting controllers - from decorative RGB strips to commercial dimmers. The CWG outputs precision PWM with dead-band control for high-side/Low-side MOSFET timing, while the 10-bit ADC reads 0-10 V or DALI dimming inputs with adequate resolution. The 16-level hardware stack and 128 B RAM are sufficient for typical DMX-512 or DALI protocol decoding. At 1.8 V minimum VDD, the MCU runs directly from rectified mains-derived low-voltage rails. The exposed UQFN pad helps dissipate gate drive power.
Recommended
Consumer Appliance User Interface
The PIC16LF1503-I/MV handles user-interface tasks in consumer appliances (microwaves, coffee machines, washing machine front panels). Its 12 I/O can matrix-scan up to a 4x4 keypad with individual weak pull-ups, drive a 7-segment or character LCD via software I2C/SPI, and read capacitive touch electrodes using the 10-bit ADC. Per the Microchip datasheet 40001607D, the ICSP two-pin programming allows firmware updates on the production line via the appliance's own connectors. The 16-UQFN footprint and 1.8 V min supply support battery-backed clock/preset retention during power loss.
Recommended
Portable Medical Accessories
The PIC16LF1503-I/MV is appropriate for portable medical accessories such as pill dispensers, nebulizer controllers, and disposable diagnostic readers where low power and small size matter. The 10-bit ADC digitizes sensor outputs (flow, pressure, colorimetric), while the CLC implements safety interlocks in hardware (independent of firmware). Operating from 1.8 V to 3.6 V, the MCU pairs with single Li-ion or 2x alkaline cells. The 16-UQFN exposed pad and small BOM support EN 60601-1 compact form factors. Designers select the LF prefix specifically for low-current battery designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1503-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1503T-I/MV | PIC16F1503-I/MV | PIC16F1503T-I/MV |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 16-UQFN (3x3) | 16-UQFN (3x3) | 16-UQFN (3x3) | 16-UQFN (3x3) |
| Flash Memory | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB |
| RAM | 128 B | 128 B | 128 B | 128 B |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 12 | 12 | 12 | 12 |
| ADC | 10-bit, 11 channels | 10-bit, 11 channels | 10-bit, 11 channels | 10-bit, 11 channels |
| Industrial Temp | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Packaging Format | Tube | Tape & Reel | Tube | Tape & Reel |
Key Differentiators
- Tube packaging for low-volume prototyping (vs PIC16LF1503T-I/MV)
- 1.8 V minimum supply enables single-cell Li-ion operation (vs PIC16F1503-I/MV)
- Full Microchip PIC16 toolchain and peripheral ecosystem (vs PIC16F1503-I/MV)
Design Notes
Place a 100 nF X7R ceramic decoupling capacitor within 3 mm of the VDD pin and a 1-10 uF bulk capacitor on the same node. Per Microchip PIC16LF1503 design guidelines, keep the VDD trace short and widen to at least 0.5 mm. For battery applications operating near 1.8 V at low temperatures, derate the bulk capacitor to maintain regulation. The exposed pad (VSS) must be soldered to a continuous ground plane for thermal dissipation and electrical reference.
Route the ICSP clock and data lines (typically pins 15/16 alternate functions) to dedicated test pads or programming header. Do NOT route high-frequency signals adjacent to the 10-bit ADC reference pins to avoid coupling noise. The 16-UQFN (3x3 mm) exposed pad requires a 1.7 mm x 1.7 mm land pattern with at least 8 thermal vias to the inner ground plane for proper heat spreading. Estimated: thermal resistance theta_JA is approximately 50 C/W on a 1 oz 2-layer FR-4 board with this via pattern, enabling reliable operation at full 20 MHz in enclosed environments.
Do not confuse PIC16LF1503 (LF = 1.8-3.6 V) with PIC16F1503 (F = 2.3-5.5 V); the LF variant is required for single-cell Li-ion (3.6 V max) and 2x AA battery designs. Configuration words MUST be set correctly for internal oscillator selection; incorrect config can cause the device to remain in reset until ICSP erases the part. The MCLR pin (pin 4) requires a 10-50 kohm pull-up to VDD if external reset is unused - floating this pin causes intermittent resets during EMI events. Use Microchip's MPLAB X IDE with XC8 v2.0 or later for proper header-file definitions of CLC/CWG/NCO registers.
Compliance Information
RoHS and REACH compliant per Microchip material declarations. Lead-free reflow JEDEC J-STD-020 MSL1. Not AEC-Q100 qualified; automotive designs should consult Microchip's automotive-grade PIC16 portfolio.
