PIC16LF819-I/SOTSL - 8-bit PIC MCU, 3.5KB Flash, 18-SOIC | Microchip
MPN: PIC16LF819-I/SOTSL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.54 | $6.54 |
| 10 | $5.84 | $58.40 |
| 100 | $5.1 | $510.00 |
| 500 | $4.42 | $2,210.00 |
| 1,000 | $3.75 | $3,750.00 |
PIC16LF819-I/SOTSL Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral set into one package. PIC microcontrollers use a Harvard RISC architecture with separate program and data buses, allowing instruction fetch and operand read in a single cycle. PIC16F devices are classified as mid-range 8-bit MCUs - more capable than baseline PIC10/PIC12 parts yet simpler than enhanced PIC18/PIC24 families, suiting cost-sensitive embedded control. PIC16LF819 sits in the power-management-friendly tier with nanoWatt sleep modes and a 12-bit ADC.
Key features include 16 digital I/O pins shared with peripheral functions, a 10-bit/12-bit ADC with up to 5 channels, two 8-bit timers plus one 16-bit timer, an Enhanced USART, MSSP (SPI/I2C), internal 31kHz-8MHz oscillator with PLL, ICD (In-Circuit Debug) support, and nanoWatt technology that drops Iq below 1uA in sleep. The wide 2.0V-5.5V operating window removes the need for multiple rails and simplifies battery-direct designs.
The 18-SOIC 7.5mm-width package exposes two analog reference pins, MCLR/Vpp programming, and a dedicated oscillator pair, leaving 16 pins for general I/O or peripheral reuse. The Harvard bus delivers deterministic 200ns instruction execution, and the flash-based program memory supports in-circuit self-programming via the bootloader-friendly ICSP interface.
Typical applications include battery-powered sensor nodes, low-end consumer appliances, simple motor-control BLDC drivers, HVAC peripherals, LED controllers, and home-automation nodes. Its low Iq makes it ideal for always-on devices where quiescent current dominates battery life.
When designing with this part, place a 100nF decoupling capacitor within 5mm of VDD, keep the MCLR pull-up weak (typically 10k) to avoid programming issues, and route the ICSP clock/data traces away from switching nodes. A 4.7k-10k pull-up on SDA/SCL is required for stable I2C communication.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers select, source, and deploy the PIC16LF819-I/SOTSL with confidence.
Drop-in alternatives for PIC16LF819-I/SOTSL — 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 PIC16LF819-I/SOTSL (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, Communication, Internal Oscillator.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF819-I/P
✅ Drop-In✓ In Stock
$2.26 / Unit
View Datasheet →PIC16LF819T-I/SOTSL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F819-I/SOTSL
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →PIC16LF818-I/SOTSL
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC16LF818-I/SO
✅ Drop-In✓ In Stock
$1.75 / Unit
View Datasheet →PIC16LF819-I/MLTSL
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →PIC16LF819-I/SOTSL Maximum Ratings & Electrical Characteristics
| Family | PIC16F |
| Core Architecture | 8-bit RISC (Harvard) |
| Core Size | 8-bit |
| Instruction Set | 12-bit program word |
| Maximum Clock Frequency | 20 MHz (10 MIPS) |
| Program Memory | 3.5 KB (2K x 14) Flash |
| Data RAM | 256 bytes |
| Data EEPROM | 256 bytes |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| I/O Pins | 16 |
| Package | 18-SOIC (7.50 mm, 1.27 mm pitch) |
| Mounting Type | Surface Mount |
| ADC | 10-bit, up to 5 channels |
| Timers | 2 x 8-bit + 1 x 16-bit |
| Communication | Enhanced USART, MSSP (SPI/I2C) |
| Internal Oscillator | 31 kHz to 8 MHz with PLL |
| In-Circuit Debug | Yes (ICD) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF819-I/SOTSL Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.0V-5.5V) |
| Pin 2 | RA0/AN0 — Digital I/O / Analog channel 0 |
| Pin 3 | RA1/AN1 — Digital I/O / Analog channel 1 |
| Pin 4 | MCLR/Vpp/RA5 — Master Clear (reset) / Programming voltage / Digital I/O |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Digital I/O / External interrupt |
| Pin 7 | RB1 — Digital I/O |
| Pin 8 | RB2 — Digital I/O |
| Pin 9 | RB3/PGM — Digital I/O / Low-voltage programming |
| Pin 10 | RB4 — Digital I/O |
| Pin 11 | RB5 — Digital I/O |
| Pin 12 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 13 | RB7/PGD — Digital I/O / ICSP data |
| Pin 14 | RA2/AN2/Vref- — Digital I/O / Analog channel 2 / ADC negative reference |
| Pin 15 | RA3/AN3/Vref+ — Digital I/O / Analog channel 3 / ADC positive reference |
| Pin 16 | RA4/AN4/T0CKI — Digital I/O / Analog channel 4 / Timer0 clock input |
| Pin 17 | RA5/SS/AN5 — Digital I/O / SPI slave select / Analog channel 5 |
| Pin 18 | OSC2/CLKOUT/RA6 — Crystal output / Clock output / Digital I/O |
Typical Applications
PIC16LF819-I/SOTSL is suitable for 7 applications: Battery-Powered Sensor Node, Home Appliance Control Board, LED Lighting Controller, Simple BLDC / DC Motor Driver, Industrial Sensor Transmitter, Consumer Remote Control / HMI, Automotive Body Electronics (Non-Safety).
Battery-Powered Sensor Node
The PIC16LF819-I/SOTSL's wide 2.0V-5.5V operating range and nanoWatt sleep modes make it ideal for battery-powered wireless sensor nodes. Its 256B EEPROM stores calibration data, while the 10-bit ADC samples analog sensors with the internal voltage reference. Quiescent current below 1uA in sleep extends coin-cell battery life to multi-year durations, and the 18-SOIC footprint keeps the PCB compact for wearable or IoT form factors.
Recommended
Home Appliance Control Board
The PIC16LF819-I/SOTSL suits home appliance control boards such as coffee makers, microwave user interfaces, and washing machine front panels. Its 16 GPIO directly drive LEDs, seven-segment displays, and keypads, while the Enhanced USART interfaces with main control modules. Industrial -40C to +85C temperature rating handles kitchen and garage environments, and the 256B EEPROM stores user settings and error codes across power cycles.
Recommended
LED Lighting Controller
In LED lighting controllers, the PIC16LF819-I/SOTSL provides PWM generation via its 16-bit timer for dimming, the 10-bit ADC reads ambient light sensors for daylight harvesting, and the MSSP drives WS2812-style or I2C LED driver chains. The 3.5KB flash holds DMX512 or DALI protocol stacks. Low-voltage operation allows direct connection to 3.3V LED driver ICs without level shifters, simplifying the BOM and reducing PCB area in commercial lighting strips.
Recommended
Simple BLDC / DC Motor Driver
The PIC16LF819-I/SOTSL operates as the control core in simple DC motor and low-end BLDC drivers, using the 16-bit timer to generate PWM at up to 20kHz and the 10-bit ADC to read back-EMF or current-sense signals. Its 5.5V tolerance interfaces directly with 5V gate drivers and Hall-effect sensors. The MSSP SPI bus reads encoder feedback while the Enhanced USART reports telemetry to a master controller in industrial automation setups.
Recommended
Industrial Sensor Transmitter
In 4-20mA or wireless industrial sensor transmitters, the PIC16LF819-I/SOTSL reads bridge sensors, RTDs, or thermistors through its 10-bit ADC and modulates the output via the USART for HART or wireless M-Bus. The -40C to +85C industrial temperature range ensures reliable operation in factory floor cabinets, while 256B EEPROM stores calibration coefficients and unit ID for field commissioning and asset tracking throughout the equipment lifecycle.
Recommended
Consumer Remote Control / HMI
The PIC16LF819-I/SOTSL is well-suited to consumer remote controls and small human-machine interfaces, where 16 GPIO scan key matrices or drive LCD segments. Its nanoWatt sleep keeps the remote's battery alive for years, waking on interrupt to handle user input. The MSSP I2C peripheral reads gesture sensors, while the Enhanced USART provides IR transmit modulation for legacy IR protocols used in TV/set-top box remote control applications.
Recommended
Automotive Body Electronics (Non-Safety)
For non-safety automotive body electronics such as seat controllers, mirror adjusters, ambient lighting, and accessory modules, the PIC16LF819-I/SOTSL provides sufficient compute and peripherals while withstanding -40C cold-crank transients. Its 18-SOIC footprint suits space-constrained body controllers. The 10-bit ADC reads potentiometers for mirror positioning, and the Enhanced USART interfaces with the body control module for diagnostic feedback and firmware updates via CAN bridges.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF819-I/SOTSL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF819-I/P | PIC16LF819T-I/SOTSL | PIC16F819-I/SOTSL | PIC16LF818-I/SOTSL | PIC16LF818-I/SO | PIC16LF819-I/MLTSL |
|---|---|---|---|---|---|---|---|
| Package | 18-SOIC (7.50 mm) | PDIP-18 (through-hole) | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 20-QFN - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 3.5 KB (2K x 14) | 3.5 KB | 3.5 KB | 3.5 KB | 1.75 KB (-50%) | 1.75 KB (-50%) | 3.5 KB |
| Data RAM | 256 B | 256 B | 256 B | 256 B | 128 B (-50%) | 128 B (-50%) | 256 B |
| Data EEPROM | 256 B | 256 B | 256 B | 256 B | None (0 B) | None (0 B) | 256 B |
| Operating Voltage (VDD) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.0 V to 5.5 V (F-variant, +2V floor) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| ADC | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | None (comparator only) | None (comparator only) | 10-bit, 5 channels |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Approx. Unit Price @ qty-1 (USD) | $6.54 | $5.95 (approx) | $6.50 (approx) | $6.40 (approx) | $4.95 (approx) | $4.85 (approx) | $6.85 (approx) |
Key Differentiators
- Wider voltage range than PIC16F819-I/SOTSL (vs PIC16F819-I/SOTSL)
- More integrated analog than PIC16LF818-I/SOTSL (vs PIC16LF818-I/SOTSL)
- SOIC footprint vs PDIP of PIC16LF819-I/P (vs PIC16LF819-I/P)
- Industrial temperature range vs Consumer-grade alternatives (vs PIC16F819-I/SOTSL)
Design Notes
Place a 100nF ceramic decoupling capacitor within 5mm of the VDD pin (pin 1) with a short trace to VSS (pin 5). For noisy environments, add a bulk 10uF tantalum or ceramic capacitor near the device. The PIC16LF819's wide 2.0V-5.5V input allows direct connection to 2x AA cells or 3.3V LDO outputs, but always confirm VDD > 2.0V at all load conditions to avoid BOR events.
Route ICSP clock (PGC, pin 12) and ICSP data (PGD, pin 13) traces away from switching power lines and high-current traces to prevent programming/debug interference. The MCLR/Vpp pin (pin 4) requires a 10k pull-up to VDD; do not leave it floating. Keep the MCLR trace short and avoid placing large capacitors on MCLR to preserve programming voltage rise time.
Do not exceed the 5.5V absolute maximum VDD; transients above 6V can latch up the part permanently. The internal oscillator calibration (OSCCAL) is loaded from the last Flash address at reset; if your program memory uses 100% of Flash, OSCCAL must be relocated to the last word manually. For I2C bus communication, use 4.7k-10k pull-ups on SDA/SCL since the internal weak pull-ups are insufficient above 400kHz.
When using the ADC, place a 100nF bypass capacitor close to VREF+/RA3 (pin 15) if driving an external reference, and route analog traces away from digital switching nodes. Use the ADC in sleep mode (with internal RC oscillator) for lowest noise readings - conversion takes about 20us with 32Tosc acquisition time. For ADC readings above 2.5V, ensure VDD >= VREF+ + 0.3V to avoid linearity errors.
Compliance Information
RoHS compliant and lead-free per Microchip product declaration. AEC-Q100 not applicable as this is an industrial-temperature MCU not automotive-qualified; AEC-Q100 variants exist in the PIC16F819 family with -E or -VA suffixes.
