PIC16LF819-I/P - 8-Bit MCU 3.5KB Flash 18-PDIP | Microchip
MPN: PIC16LF819-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.21 | $32.10 |
| 100 | $2.85 | $285.00 |
| 500 | $2.54 | $1,270.00 |
| 1,000 | $2.26 | $2,260.00 |
PIC16LF819-I/P Overview
An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, RAM, non-volatile program memory (Flash/ROM), data EEPROM, peripheral set, and I/O - all optimized for low-cost embedded control. MCUs sit within the broader taxonomy of microprocessors -> microcontrollers -> 8-bit MCUs -> PIC16 family. 8-bit PIC MCUs use a RISC Harvard architecture with a small instruction set (35 instructions for PIC16F), enabling deterministic 200 ns instruction execution at 20 MHz.
Key features include nanoWatt technology for low-power operation, an internal 8 MHz oscillator, a 10-bit Analog-to-Digital Converter (ADC) with up to 5 channels, 1 capture/compare/PWM (CCP) module, an Enhanced USART (EUSART) supporting RS-232/RS-485, an MSSP module for SPI/I2C, and 2 comparators. The device supports In-Circuit Serial Programming (ICSP) via two pins and In-Circuit Debugging.
The PIC16LF819 employs a 14-bit instruction word with single-cycle execution except for branches. It is upwards compatible with PIC16C7x, PIC16C62xA, PIC16C5X, and PIC12Cxxx devices per Microchip documentation, simplifying migration of legacy firmware. The wide operating voltage (1.8-3.6V) suits battery-powered applications, and nanoWatt power management modes reduce quiescent current below 1 microampere in sleep.
Typical applications include industrial control (sensor conditioning and motor drivers), consumer electronics (remote controls and small appliances), automotive interior modules, medical portable devices, low-power IoT sensors, and battery-powered instrumentation. The 18-PDIP package simplifies prototyping and breadboarding.
A primary design consideration is supply voltage: the LF suffix designates 1.8-3.6V operation, distinct from the F-variant (2.0-5.5V). Designers must verify regulator headroom and decoupling. Brown-out Reset (BOR) and Power-on Reset (POR) are configurable via configuration bits.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes beyond the manufacturer datasheet to accelerate PIC16LF819 selection.
Drop-in alternatives for PIC16LF819-I/P — 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/P (same form factor and footprint) — differing in Package, Internal Oscillator, Operating Temperature, Core Architecture, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F819-I/PTSL
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC16F818-I/P
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16LF818-I/P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF628A-I/P
✅ Drop-In✓ In Stock
$1.84 / Unit
View Datasheet →PIC16F88-I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.61 / Unit
View Datasheet →PIC16F627A-I/P
✅ Drop-In✓ In Stock
$1.72 / Unit
View Datasheet →PIC16LF819-I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC |
| Instruction Set Width | 14-bit |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| Data EEPROM | 256 bytes |
| Data RAM | 256 bytes |
| Maximum CPU Speed | 20 MHz (10 MIPS) |
| Instruction Cycle | 200 ns @ 20 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 16 |
| ADC | 10-bit, up to 5 channels |
| Comparators | 2 |
| CCP Modules | 1 (Capture/Compare/PWM) |
| Communication | EUSART + MSSP (SPI/I2C) |
| Internal Oscillator | 8 MHz |
| Operating Temperature | -40 C to +85 C (Industrial, 'I') |
| Package | 18-PDIP (300 mil, 7.62 mm) |
| Mounting Type | Through-Hole |
| Programming | ICSP (In-Circuit Serial Programming) |
| Low-Power Mode | nanoWatt technology |
| RoHS Status | Compliant |
PIC16LF819-I/P Pin Configuration
| Pin 1 | RA2/AN2/VREF- — GPIO RA2 / ADC channel 2 / negative voltage reference |
| Pin 2 | RA3/AN3/VREF+ — GPIO RA3 / ADC channel 3 / positive voltage reference |
| Pin 3 | RA4/AN4/C1OUT — GPIO RA4 / ADC channel 4 / Comparator 1 output |
| Pin 4 | RA5/AN5/C2OUT — GPIO RA5 / ADC channel 5 / Comparator 2 output |
| Pin 5 | VSS — Ground reference |
| Pin 6 | OSC1/RA7 — Crystal oscillator input / GPIO RA7 |
| Pin 7 | OSC2/RA6 — Crystal oscillator output / GPIO RA6 |
| Pin 8 | RC0/T1OSO/T1CKI — GPIO RC0 / Timer1 oscillator output / Timer1 clock input |
| Pin 9 | RC1/T1OSI — GPIO RC1 / Timer1 oscillator input |
| Pin 10 | RC2/CCP1 — GPIO RC2 / Capture/Compare/PWM 1 output |
| Pin 11 | RC3/SCK/SCL — GPIO RC3 / SPI clock / I2C clock |
| Pin 12 | RC4/SDI/SDA — GPIO RC4 / SPI data in / I2C data |
| Pin 13 | RC5/SDO — GPIO RC5 / SPI data out |
| Pin 14 | RC6/TX/CK — GPIO RC6 / EUSART TX / EUSART clock |
| Pin 15 | RC7/RX/DT — GPIO RC7 / EUSART RX / EUSART data |
| Pin 16 | RB0/INT — GPIO RB0 / External interrupt |
| Pin 17 | RB1 — GPIO RB1 |
| Pin 18 | VDD — Positive supply voltage (1.8V to 3.6V) |
Typical Applications
PIC16LF819-I/P is suitable for 6 applications: Battery-Powered Sensor Node, Industrial Control and Automation, Consumer Remote Control and Appliance, Automotive Interior Accessory, Medical Portable Monitoring, IoT Edge Sensor and Smart Home.
Battery-Powered Sensor Node
The PIC16LF819-I/P is well suited for battery-powered sensor nodes that need to run for years on a single coin cell or two AA batteries. Its 1.8V to 3.6V VDD range permits direct connection to alkaline or lithium chemistries without boost conversion, and nanoWatt technology keeps sleep current below 1 microampere. The 10-bit ADC with 5 channels accepts thermistor, photocell, or gas-sensor outputs directly, while the integrated 8 MHz internal oscillator eliminates the external crystal and saves BOM cost. Typical sleep duty cycles of 0.1% yield multi-year battery life for periodic temperature, humidity, or motion logging. The 256-byte EEPROM stores calibration coefficients and event counters across power cycles, preserving data integrity through battery swaps.
Recommended
Industrial Control and Automation
In industrial 24V-bus systems the PIC16LF819-I/P serves as a low-cost local controller for sensor conditioning, switch debouncing, and actuator drive. Its 16 digital I/O pins handle multiple discrete inputs (limit switches, opto-isolated feedback) and outputs (relays, LED indicators), while the 10-bit ADC reads 4-20 mA loop-derived voltages through burden resistors. The EUSART implements RS-485 or RS-232 host communication for SCADA integration, and the CCP module generates PWM for proportional valve or motor-speed commands. The -40C to +85C industrial temperature rating covers factory-floor enclosures, and ICSP allows firmware updates in the field without removing the module. The 18-PDIP package simplifies hand-soldered prototype and repair.
Recommended
Consumer Remote Control and Appliance
The PIC16LF819-I/P fits consumer remote controls, white-goods user interfaces, and small kitchen appliances. Its low cost, 18-PDIP easy-to-solder package, and 16 I/O pins drive keypads, IR LEDs, seven-segment displays, and buzzer feedback. The internal 8 MHz oscillator removes external resonator cost, while nanoWatt sleep minimizes standby current - critical for battery-operated remotes. The CCP module generates accurate 38 kHz carrier for IR transmission, and the 10-bit ADC reads potentiometer inputs for speed or temperature setpoints. Total BOM typically stays under $2 with the PIC16LF819 + IR LED + tact switches, enabling sub-$5 retail remote designs.
Recommended
Automotive Interior Accessory
The PIC16LF819-I/P targets automotive interior accessories such as LED ambient lighting controllers, seat-heater switches, and accessory timers. While the LF variant is not AEC-Q100 qualified (the -E variant with extended temperature would be required for under-hood), interior cabin temperatures typically remain within the -40C to +85C industrial range. The 16 I/O pins handle RGB LED PWM channels through the CCP module plus discrete button inputs, and the EUSART supports LIN slave protocol for body-control module communication. The 3.5 KB Flash is sufficient for color-mixing algorithms and button-debounce logic, while 256 bytes EEPROM stores user preferences across ignition cycles.
Recommended
Medical Portable Monitoring
In medical portable monitors such as pulse oximeters, digital thermometers, and single-parameter patient monitors, the PIC16LF819-I/P provides deterministic 8-bit processing with low power consumption. The 10-bit ADC reads photo-detector outputs for SpO2 measurement or thermistor bridges for body temperature, while the EUSART streams data to a host Bluetooth or display module. NanoWatt sleep mode extends battery life between measurements - essential for handheld devices that must last days on a single charge. The 3.5 KB Flash accommodates simple peak-detection and trending algorithms, and the 18-PDIP simplifies medical-prototype assembly. Note: production medical designs should validate IEC 60601 compliance separately.
Recommended
IoT Edge Sensor and Smart Home
The PIC16LF819-I/P serves as the local intelligence in IoT edge sensors and smart-home devices where it pre-processes analog signals before forwarding to a wireless module. The MSSP module drives SPI or I2C-connected radios (sub-GHz transceivers, BLE modules) while the EUSART handles debug output. Its 16 I/O pins accommodate multiple push-buttons, LED indicators, and relay drivers for smart switches. Sleep currents below 1 microampere combined with the 1.8V minimum supply enable multi-year battery operation for door/window sensors and occupancy detectors. The 256-byte EEPROM retains network credentials and last-known states across brown-out events.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF819-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F819-I/P | PIC16F818-I/P | PIC16LF818-I/P | PIC16LF628A-I/P | PIC16F88-I/P | PIC16F627A-I/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same |
| Supply Voltage | 1.8 V to 3.6 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Flash Memory | 3.5 KB (2K x 14) | 3.5 KB | 1.75 KB | 1.75 KB | 3.5 KB | 7 KB | 1.75 KB |
| Data RAM | 256 bytes | 256 bytes | 128 bytes | 128 bytes | 224 bytes | 368 bytes | 128 bytes |
| Data EEPROM | 256 bytes | 256 bytes | 128 bytes | 128 bytes | 128 bytes | 256 bytes | 128 bytes |
| ADC | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | None | 10-bit, 7 channels | None |
| Internal Oscillator | 8 MHz | 8 MHz | None | None | 4 MHz | 8 MHz | 4 MHz |
Key Differentiators
- Internal 8 MHz oscillator eliminates external crystal (vs PIC16F818-I/P)
- Lower minimum supply voltage for battery applications (vs PIC16F819-I/P)
- Dual on-chip comparators for analog front-end (vs PIC16F88-I/P)
Design Notes
Estimated: at VDD=3.3V and 20 MHz active mode, the PIC16LF819-I/P draws approximately 8-10 mA active current per Microchip datasheet 39592D. In sleep mode with the Watchdog Timer disabled, current drops below 1 microampere, enabling multi-year battery life at duty cycles below 0.1%. Decoupling requires a 0.1 uF ceramic capacitor placed within 5 mm of the VDD pin (pin 18) plus a 10 uF bulk capacitor at the regulator output. Designers using switching regulators must keep switching frequency above 100 kHz and place the PIC on a separate filtered LDO stage to avoid conducted EMI coupling into analog inputs.
For 18-PDIP through-hole layout, allocate a 0.300 inch (7.62 mm) row pitch with 0.100 inch (2.54 mm) pin pitch. Use a ground plane on the bottom layer to reduce EMI and provide thermal mass. Place the decoupling capacitor (0.1 uF) on the VDD pin side of the board, with the trace to VDD kept under 5 mm. For ICD (In-Circuit Debugger) compatibility, expose the ICSPDAT and ICSPCLK pins (RB6/RB7) on a 6-pin header per Microchip ICD specification. Reset (MCLR) requires a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for proper POR timing.
The PIC16LF819-I/P must NOT be powered above 3.6V - exceeding this limit causes permanent damage. Designers migrating from PIC16F819 to PIC16LF819 must verify their LDO output does not exceed 3.6V under load transients. The configuration word must be set correctly to select the internal 8 MHz oscillator (INTSRC = 1) when no external crystal is used; otherwise the MCU will not start. Brown-out Reset (BOR) should be enabled in the configuration word for reliable operation across brown-out events; disabling BOR can lead to code execution corruption if VDD sags below 1.8V. The MCLR pin must NOT be left floating - always tie to VDD through a resistor.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade (-40C to +85C, 'I' suffix). Not AEC-Q100 qualified; for automotive designs use AEC-Q100 qualified parts. Conflict-minerals compliance per Microchip declaration.
