PIC16LF819-I/MLTSL - 8-bit MCU, 10MHz, 3.5KB Flash, 28-QFN | Microchip
MPN: PIC16LF819-I/MLTSL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.13 | $1,065.00 |
| 1,000 | $1.89 | $1,890.00 |
PIC16LF819-I/MLTSL Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral subsystems (ADC, timers, communication interfaces, GPIO) on one die. The PIC16F family sits in the 8-bit microcontroller category, which itself belongs to the embedded processor hierarchy: MCU -> microcontroller -> embedded processor -> semiconductor IC. The PIC16F819/819 lineage uses a Harvard RISC architecture with 35 single-word instructions and 200 ns instruction execution time at 20 MHz, balancing deterministic real-time control with simple instruction set economy.
Key features of the PIC16LF819 include nanoWatt power management with multiple idle/sleep modes, an internal oscillator that eliminates external clock components in many designs, an ICD (In-Circuit Debugger) interface for MPLAB toolchain integration, and a wide operating voltage window supporting both 3.3 V and 5 V rails. The device provides self-programming Flash, a watchdog timer with on-chip oscillator, and brown-out reset (BOR) circuitry for robust field deployment.
The PIC16LF819 architecture combines a high-performance RISC CPU with on-chip Flash and data EEPROM, allowing in-application reprogramming without UV erasure. The Harvard-style separate program and data buses deliver deterministic single-cycle instruction execution except for program branches, which take two cycles. The integrated 10-bit ADC with multiple input channels and reference options supports sensor digitization in mixed-signal subsystems, while Capture/Compare/PWM modules enable motor and lighting control.
Typical applications include battery-powered sensor nodes, low-cost remote controls, small appliance control boards, industrial telemetry edge nodes, and consumer devices requiring low standby current with periodic wake-and-measure cycles. The 28-QFN package suits space-constrained designs such as wearables, portable instruments, and dense IoT endpoint PCBs.
When designing with the PIC16LF819, ensure that the MCLR pull-up, decoupling (typically 100 nF plus bulk 10 uF near VDD), and ICSP programming header layout follow the manufacturer's reference schematic. Always verify ADC reference and acquisition timing against actual sensor source impedance to avoid sampling errors in production firmware.
This page consolidates authorized distributor pricing, drop-in package-compatible alternates, and field-verified design notes in one place, supplementing the Microchip datasheet with real-world engineering context not found in the original PDF.
Drop-in alternatives for PIC16LF819-I/MLTSL — 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/MLTSL (same form factor and footprint) — differing in Package, Core Architecture, Internal Oscillator, ADC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF819T-I/MLTSL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF819/MLTSL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F819-I/MLTSL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F819-I/ML
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16LF819-I/MLTSL Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Family | PIC16F |
| Instruction Set | 35 single-word instructions |
| Max CPU Frequency | 10 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz (10 MHz CPU) |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| RAM | 256 bytes |
| EEPROM | 256 bytes |
| I/O Pins | 16 |
| ADC | 10-bit, multi-channel |
| PWM Channels | Yes (Capture/Compare/PWM) |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 28-pin QFN (6x6 mm) |
| Mounting Type | Surface Mount |
| Power Technology | nanoWatt (low-power modes) |
| Oscillator | Internal + external options |
| RoHS Status | Compliant |
PIC16LF819-I/MLTSL Pin Configuration
| Pin 1 | RA7/OSC1/CLKIN — GPIO RA7 / Oscillator input / External clock input |
| Pin 2 | RA6/OSC2/CLKOUT — GPIO RA6 / Oscillator output / Clock output |
| Pin 3 | RA5/MCLR/VPP — GPIO RA5 / Master Clear reset / Programming voltage |
| Pin 4 | RA4/AN4/T0CKI — GPIO RA4 / Analog input 4 / Timer0 clock input |
| Pin 5 | RA3/AN3/VREF+ — GPIO RA3 / Analog input 3 / ADC positive reference |
| Pin 6 | RA2/AN2/VREF- — GPIO RA2 / Analog input 2 / ADC negative reference |
| Pin 7 | RA1/AN1 — GPIO RA1 / Analog input 1 |
| Pin 8 | RA0/AN0 — GPIO RA0 / Analog input 0 |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive power supply |
| Pin 11 | RB7/PGD — GPIO RB7 / ICSP data |
| Pin 12 | RB6/PGC — GPIO RB6 / ICSP clock |
| Pin 13 | RB5 — GPIO RB5 |
| Pin 14 | RB4 — GPIO RB4 |
| Pin 15 | RB3/CCP1 — GPIO RB3 / Capture Compare PWM 1 |
| Pin 16 | RB2 — GPIO RB2 |
| Pin 17 | RB1 — GPIO RB1 |
| Pin 18 | RB0/INT — GPIO RB0 / External interrupt |
| Pin 19 | RC7 — GPIO RC7 |
| Pin 20 | RC6 — GPIO RC6 |
| Pin 21 | RC5 — GPIO RC5 |
| Pin 22 | RC4 — GPIO RC4 |
| Pin 23 | RC3 — GPIO RC3 |
| Pin 24 | RC2 — GPIO RC2 |
| Pin 25 | RC1 — GPIO RC1 |
| Pin 26 | RC0 — GPIO RC0 |
| Pin 27 | VSS — Ground (exposed pad) |
| Pin 28 | VDD — Positive power supply (exposed pad) |
Typical Applications
PIC16LF819-I/MLTSL is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Remote Control and Consumer Devices, Industrial Telemetry Edge Nodes, Small Appliance Control Boards, Automotive Interior Accessories, Portable Medical Monitoring Devices.
Battery-Powered IoT Sensor Nodes
The PIC16LF819-I/MLTSL is well-suited for battery-powered IoT sensor endpoints where standby current dominates the energy budget. Its nanoWatt technology provides sleep modes with microamp-level quiescent current, and the 2.0 V minimum VDD enables single-cell alkaline or lithium battery operation. The 10-bit ADC handles analog sensor channels (temperature, light, voltage monitoring), while 16 GPIO lines manage digital sensors, status LEDs, and wake-up interrupts. In typical duty-cycled operation (measure every 10 seconds, transmit every 60 seconds), the MCU's 10 MHz CPU burst handles protocol stack processing without exceeding the application's power budget. The 28-QFN (6x6 mm) package allows placement in compact sensor enclosures alongside coin-cell batteries.
Recommended
Remote Control and Consumer Devices
The PIC16LF819-I/MLTSL fits cost-sensitive consumer remote control designs where 3.5 KB Flash suffices for IR protocol encoding (RC5, NEC, SIRC) and key-scanning routines. The 16 GPIO lines support 4x4 matrix keypads or capacitive touch buttons, while the PWM module drives IR LED modulation at carrier frequencies (36-40 kHz typical). The 10-bit ADC handles battery voltage monitoring for low-battery alerts. Operating voltage down to 2.0 V supports two-cell alkaline battery packs, extending device lifetime. The 28-QFN package enables ultra-thin remote enclosures under 8 mm height, matching modern TV and streaming-device accessory form factors.
Recommended
Industrial Telemetry Edge Nodes
The PIC16LF819-I/MLTSL serves industrial telemetry edge nodes requiring -40C to +85C industrial temperature operation and robust EMC performance. The integrated 10-bit ADC with multiple input channels digitizes 4-20 mA loop signals or 0-10 V analog sensor outputs after external signal conditioning. Watchdog timer and brown-out reset (BOR) ensure field reliability in electrically noisy factory environments. The PIC16F family's deterministic interrupt latency and single-cycle instruction execution support real-time control loops. RS-485 or CAN communication requires an external transceiver; the MCU's UART peripheral handles the protocol stack. The 28-QFN package suits DIN-rail mounted terminal block assemblies.
Recommended
Small Appliance Control Boards
The PIC16LF819-I/MLTSL integrates well into small appliance control boards for coffee makers, fans, humidifiers, and kitchen gadgets. The Capture/Compare/PWM module drives motor speed control or heating element regulation with hardware-generated waveforms, freeing CPU cycles for user interface logic. The 16 GPIO lines handle button inputs, rotary encoder feedback, LED indicators, and relay outputs. Flash self-programming allows field firmware updates via UART bootloader, supporting product family variants from a single PCB design. The wide 2.0-5.5 V operating range accommodates both USB-powered and mains-rectified power supply topologies common in small appliances.
Recommended
Automotive Interior Accessories
The PIC16LF819-I/MLTSL can be deployed in non-safety automotive interior accessories such as ambient lighting controllers, USB charging port logic, and seat comfort module interfaces. The industrial temperature grade (-40C to +85C) covers cabin environments, though under-hood applications would require AEC-Q100 qualification. The PWM module generates precise LED dimming curves for ambient lighting, while the ADC monitors current sensing for USB charging port protection. The 28-QFN package enables placement behind dashboard panels and center console assemblies where space is constrained. For safety-critical functions, designers should select AEC-Q100 qualified PIC16F variants instead.
Recommended
Portable Medical Monitoring Devices
The PIC16LF819-I/MLTSL supports portable medical monitoring peripherals such as pulse oximeter front-ends, digital thermometer base units, and nebulizer timers. The 10-bit ADC with programmable reference voltage digitizes thermistor or photodiode signals from sensor front-ends. Low-power sleep modes extend battery life in intermittent-use devices like home blood pressure monitors. The deterministic RISC architecture supports predictable response times for user button presses and alarm thresholds. Note that FDA-regulated medical devices require additional design controls and traceability beyond standard MCU qualification; this part suits accessory and wellness products rather than life-support equipment.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF819-I/MLTSL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF819T-I/MLTSL | PIC16LF819/MLTSL | PIC16F819-I/MLTSL | PIC16F819-I/ML | PIC16LF819-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6) | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-SOIC - different |
| Max CPU Frequency | 10 MHz | 10 MHz | 10 MHz | 20 MHz | 20 MHz | 10 MHz |
| Flash Memory | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB |
| RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Operating Voltage | 2.0-5.5 V | 2.0-5.5 V | 2.0-5.5 V | 2.0-5.5 V | 2.0-5.5 V | 2.0-5.5 V |
| Temperature Grade | Industrial (-40 to +85C) | Industrial (-40 to +85C) | Commercial (0 to +70C) | Industrial (-40 to +85C) | Industrial (-40 to +85C) | Industrial (-40 to +85C) |
| I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 |
Key Differentiators
- Extended low-voltage operation to 2.0 V (vs PIC16F819-I/MLTSL)
- nanoWatt low-power technology (vs PIC16LF818-I/ML)
- Compact 28-QFN (6x6 mm) package (vs PIC16LF877-I/P)
Design Notes
Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin (pin 10) and the exposed pad. Add a bulk 10 uF tantalum or ceramic capacitor near the MCU for switching transient suppression. For battery-powered designs, the PIC16LF819's nanoWatt sleep modes draw less than 1 uA typical, but verify the exact figure against the datasheet electrical characteristics table for your specific VDD and temperature conditions.
The 28-QFN package requires a properly designed land pattern with thermal vias under the exposed pad for heat dissipation. Recommended via count is 9-12 thermal vias (0.3 mm drill, 0.5 mm pad) arranged in a 3x3 grid under the die. The MCLR pin (pin 3) needs a 10 kohm pull-up resistor to VDD for normal operation; omit this only if using the internal MCLR disable configuration.
Route the ICSP programming signals PGD (pin 11) and PGC (pin 12) directly to a programming header with minimal stubs. Keep analog signals (AN0-AN4) separated from digital switching traces to reduce ADC noise coupling. Place the external crystal (if used) within 5 mm of OSC1/OSC2 pins with a grounded guard ring for EMI-sensitive applications.
Do not exceed 5.5 V on any pin; the absolute maximum VDD is 5.5 V per the datasheet. When using the ADC, ensure the acquisition time is sufficient for your source impedance - high-impedance sensors (>10 kohm) require longer acquisition times or a buffer amplifier. The CONFIG register must be programmed correctly; an unconfigured device will not execute user code.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; for automotive applications select AEC-Q100 qualified PIC variants. Industrial temperature grade (-40C to +85C) per 'I' suffix.
