PIC16LF819T-I/SOG - 8-Bit 10MHz 3.5KB FLASH MCU | Microchip
MPN: PIC16LF819T-I/SOG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.56 | $256.00 |
| 500 | $2.3 | $1,150.00 |
| 1,000 | $2.05 | $2,050.00 |
PIC16LF819T-I/SOG Overview
What is an 8-bit PIC microcontroller? It is a Harvard-architecture RISC processor that executes one instruction per cycle (except branches) and is widely used in embedded control for its deterministic behaviour, low power, and broad peripheral integration. Within the broader product hierarchy, the PIC16F family sits between the smaller PIC10/12/16 baseline families and the PIC18 mid-range and PIC32 MIPS-based families. PIC microcontrollers are commonly chosen for sensor interfacing, LED driving, user I/O expansion, and low-cost motor control.
Key features of the PIC16LF819T-I/SOG include the nanoWatt Technology power-management suite with multiple sleep modes and dynamic oscillator switching, an internal 8MHz/32kHz oscillator, 16 I/O pins, a 10-bit ADC with up to 8 channels, PWM/SCCP/ECCP capture-compare modules, an MSSP for SPI/I2C, an enhanced USART for LIN/RS-232, and an ICD2/ICSP in-circuit programming/debug interface. The Flash-based program memory supports up to 100K erase/write cycles typical, with internal self-programmability under software control.
The device integrates a precision 1% internal oscillator that often eliminates the external crystal, reducing BOM cost and PCB area. Brown-out Reset, Power-on Reset, Watchdog Timer with its own on-chip RC oscillator, and a programmable Low-Voltage Detect circuit provide robust single-supply operation suitable for unattended or remote installations.
Typical applications include industrial sensor conditioning, low-power remote keyless entry, consumer appliance control, battery chargers, small fan/lighting controllers, and low-cost instrumentation front-ends. The 256-byte EEPROM is particularly useful for storing calibration constants, serial numbers and user preferences that survive power cycles.
When designing with this part, place decoupling capacitors within 3mm of the VDD/AVDD/VSS pins and route the ICSPDAT/ICSPCLK traces away from switching nodes to maintain clean in-circuit debug signals. For low-power designs, switch the system clock to 31kHz internal and place the device in Sleep mode between interrupts - this typically reduces I-DDT to single-digit microamp levels per the datasheet nanoWatt specifications.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet to accelerate your component-selection decision.
Drop-in alternatives for PIC16LF819T-I/SOG — 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 PIC16LF819T-I/SOG (same form factor and footprint) — differing in Core Architecture, Package, Timers, Communication, Internal Oscillator.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF819-I/SOTSL
✅ Drop-In✓ In Stock
$3.75 / Unit
View Datasheet →PIC16F819-I/SO
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16LF818-I/SO
✅ Drop-In✓ In Stock
$1.75 / Unit
View Datasheet →PIC16LF819T-I/SOG Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard) |
| CPU Speed | 10 MHz maximum (10 MIPS) |
| Program Memory | 3.5 KB (2K x 14) Flash |
| SRAM | 256 bytes |
| EEPROM | 256 bytes |
| I/O Pins | 16 |
| Supply Voltage Range | 2.0 V to 5.5 V |
| ADC | 10-bit, up to 8 channels |
| Timers | Timer0, Timer1, Timer2 with PWM |
| Capture/Compare | 1 ECCP + 1 SCCP module |
| Communication | MSSP (SPI/I2C), Enhanced USART (LIN/RS-232) |
| Internal Oscillator | 8 MHz (1% accurate after calibration) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 18-SOIC (SOG), Tape and Reel |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| In-Circuit Programming | ICSP / ICD2 |
PIC16LF819T-I/SOG Pin Configuration
| Pin 1 | MCLR/VPP/RA3 — Master Clear (Reset) input / Programming voltage / Port A bit 3 |
| Pin 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / Negative voltage reference |
| Pin 5 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / Positive voltage reference |
| Pin 6 | RA4/AN4/T0CKI — Port A bit 4 / Analog input 4 / Timer 0 clock input |
| Pin 7 | RA5/AN5/SS/HLVDIN — Port A bit 5 / Analog input 5 / SPI slave select / High-Low Voltage Detect input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/RA7 — Crystal oscillator input / Port A bit 7 |
| Pin 10 | OSC2/RA6 — Crystal oscillator output / Port A bit 6 |
| Pin 11 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator output / Timer 1 clock input |
| Pin 12 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer 1 oscillator input / Capture-Compare-PWM 2 |
| Pin 13 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 |
| Pin 14 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — Port C bit 6 / USART transmit / USART clock |
| Pin 18 | RC7/RX/DT — Port C bit 7 / USART receive / USART data |
Typical Applications
PIC16LF819T-I/SOG is suitable for 6 applications: Industrial Sensor Conditioning, Consumer Appliance Control, Battery-Powered Remote Keyless Entry, LED Lighting Controllers, Low-Cost Instrumentation Front-End, Automotive Interior Accessories (Sub-Grade).
Industrial Sensor Conditioning
The PIC16LF819T-I/SOG is a strong fit for industrial sensor conditioning front-ends that need on-chip ADC and a small MCU in one package. With its 10-bit ADC supporting up to 8 channels, 16 digital I/O, and SPI/I2C master capability via MSSP, the device can read thermocouples, RTDs, strain gauges, or 4-20 mA loop inputs while driving local status LEDs and HMI displays. The internal 1%-accurate 8 MHz oscillator eliminates the external crystal on space-constrained DIN-rail modules, and the -40C to +85C industrial temperature grade tolerates cabinet environments. The 256-byte EEPROM is ideal for storing per-channel calibration constants and range codes. Power-on Reset and Brown-out Reset protect against supply brown-outs in 24V-bus-derived rails. For battery-backed or wireless sensors, the LF variant drops to 0.7 uA Sleep current to extend service intervals.
Recommended
Consumer Appliance Control
The PIC16LF819T-I/SOG serves as a low-cost main controller in consumer appliances such as coffee machines, microwave ovens, toasters, and washing-machine sub-modules. Its 3.5 KB Flash easily fits typical state-machine control code plus a UI handler for buttons, rotary encoders, and 7-segment or LCD displays. The ECCP module generates PWM outputs for motor-speed control or triac-fired heater elements, while the enhanced USART interfaces to wireless or BLE modules for smart-appliance connectivity. The 2.0-5.5V operating range simplifies designs that must work across universal mains-derived 3.3V and 5V rails. The Watchdog Timer with its own on-chip RC oscillator guards against code lockup from EMI. Tape-and-reel packaging supports high-volume SMT assembly for mass-market consumer products where unit cost matters most.
Recommended
Battery-Powered Remote Keyless Entry
The PIC16LF819T-I/SOG is well-suited for handheld battery-powered products like remote keyless entry fobs and small wireless sensors because the LF family variant operates down to 2.0V, drawing as little as 0.7 uA in Sleep mode. The 10 MHz MIPS throughput is more than sufficient for AES/Keeloq rolling-code encryption or simple proprietary RF protocols, while the internal 8 MHz oscillator saves the BOM cost of an external crystal. The 16 I/O pins drive the user pushbuttons, status LED, and the SPI-controlled RF transmitter chip, and the 256-byte EEPROM securely stores the rolling-code counters and serial numbers that must survive battery swaps. The wide 2.0-5.5V supply range lets the same design work from a single CR2032 coin cell or two AA alkalines, simplifying SKU management.
Recommended
LED Lighting Controllers
The PIC16LF819T-I/SOG provides a cost-effective core for decorative and architectural LED lighting controllers. The ECCP module generates PWM with fine duty-cycle resolution for colour-mixing RGB/RGBW fixtures or for smooth dimming curves, while the 10-bit ADC reads ambient-light sensors and potentiometer setpoints to drive constant-luminance feedback loops. The MSSP can slave to external I2C LED driver ICs, or the device can drive constant-current LED drivers directly through its GPIO. Internal oscillator accuracy is sufficient for deterministic PWM frequency and avoids external crystals in low-cost fixtures. Brown-out Reset ensures clean restarts on dimmer-derived noisy supplies, and Sleep current below 1 uA enables battery-backed emergency-lighting products with multi-year shelf life.
Recommended
Low-Cost Instrumentation Front-End
The PIC16LF819T-I/SOG fits low-cost instrumentation designs such as handheld multimeters, simple data loggers, and educational lab gear. Its 10-bit ADC provides adequate resolution for non-precision measurements, and the 256-byte SRAM buffers small sample bursts while the 256-byte EEPROM stores up to 256 calibration points per device. The enhanced USART streams logged data to a host PC over RS-232 or via a USB-to-serial bridge, while the MSSP drives I2C LCD character displays or external FRAM. The ICSP/ICD2 in-circuit debug interface accelerates firmware bring-up on the bench, and the industrial -40C to +85C range allows outdoor field-instrument use. NanoWatt sleep modes extend battery runtime for portable loggers sampling once per second.
Recommended
Automotive Interior Accessories (Sub-Grade)
The PIC16LF819T-I/SOG can be used in non-safety automotive interior accessories such as interior LED mood lighting, USB charger controllers, and aftermarket gauge clusters, though it does not carry AEC-Q100 qualification. The industrial -40C to +85C temperature range handles cabin environments, and the 16 I/O pins drive multiple LED strings or read button matrices. The enhanced USART supports LIN bus communication for body-electronics slaves that coordinate with the vehicle's central body controller. Watchdog Timer and Brown-out Reset guard against cranking-voltage transients. For safety-critical applications such as airbag controllers or electronic power steering, migrate to the AEC-Q100-qualified PIC16F819-I/SO automotive variant, which uses the same die and pinout but carries full automotive PPAP documentation.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF819T-I/SOG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF819-I/SO | PIC16F819-I/SO | PIC16LF818-I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (SOG) | 18-SOIC (SO) - same footprint | 18-SOIC (SO) - same footprint | 18-SOIC (SO) - same footprint |
| Flash Memory | 3.5 KB | 3.5 KB | 3.5 KB | 1.75 KB |
| SRAM | 256 B | 256 B | 256 B | 128 B |
| EEPROM | 256 B | 256 B | 256 B | 128 B |
| Operating Voltage | 2.0 V to 5.5 V (LF optimized) | 2.0 V to 5.5 V (LF optimized) | 2.0 V to 5.5 V (standard F) | 2.0 V to 5.5 V (LF optimized) |
| CPU Speed | 10 MIPS at 10 MHz | 10 MIPS at 10 MHz | 10 MIPS at 10 MHz | 10 MIPS at 10 MHz |
| I/O Pins | 16 | 16 | 16 | 16 |
| Packaging Format | Tape and Reel (T suffix) | Tube (no T suffix) | Tube | Tube |
Key Differentiators
- LF family with nanoWatt Sleep down to 0.7 uA (vs PIC16F819-I/SO (standard F))
- Tape-and-reel factory packaging as standard (vs PIC16LF819-I/SO (tube version))
- Double the Flash/RAM/EEPROM of the 818 sibling (vs PIC16LF818-I/SO)
Design Notes
Place a 100 nF decoupling capacitor within 3 mm of the VDD pin and a second 100 nF near AVSS/AVDD if the ADC is used; add a bulk 10 uF tantalum or ceramic at the regulator output. For 2xAA-battery designs, include an MCP1700 or equivalent 250 mA LDO to keep the rail above 2.0 V as the cells deplete, since the LF variant drops below its minimum at approximately 2.0 V. Per Microchip datasheet DS39644C, ensure AVDD and VDD are tied to the same supply if the internal ADC reference is used, or else tie AVSS to VSS directly with a short trace. Brown-out Reset should be enabled to trigger at 2.0 V (BORV = 1) for 2-cell operation.
Route the ICSPDAT/ICSPCLK traces (RB6/RB7 on 28-pin variants, RG5/RG6 or RC6/RC7 on this 18-SOIC variant depending on configuration) directly to a 6-pin header with no series resistors or series ferrites that would degrade the ICD2 debug signal integrity. Keep these traces under 50 mm total length and route away from switching nodes such as the ECCP PWM outputs or relay-coil drivers. For the 18-SOIC footprint, follow the IPC-7351 SOIC-18 land pattern with pad width approximately 0.55 mm and pad length 2.0 mm to ensure reliable solder joints. Add a guard ring around the MCLR pin to prevent false resets from leakage on humid PCB surfaces.
Do not forget the configuration-word settings: enable the Watchdog Timer only if the application can service it, configure the oscillator mode (typically INTIO2 for internal 8 MHz without PLL), and disable the Low-Voltage Programming bit if your in-circuit programmer does not support it. Per Microchip datasheet DS39644C, the analog-input pins default to digital on reset - configure them as analog via the ANSEL register before reading the ADC, or readings will return 0. Also note that the MSSP module must be configured for SPI or I2C mode in the SSPM bits; an unset SSPM keeps the module idle and SDA/SCL pins are not driven.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; use automotive-grade PIC16F819 variants for vehicle applications. Lead-free and halogen-free packaging confirmed by Microchip environmental compliance documentation.
