PIC16LF819T-I/ML - 8-bit MCU, 3.5KB Flash, 10MHz, 28-QFN
MPN: PIC16LF819T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $3 | $1,500.00 |
| 1,000 | $2.71 | $2,710.00 |
| 3,000 | $2.44 | $7,320.00 |
PIC16LF819T-I/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash/ROM), working memory (RAM), and programmable I/O peripherals into a single IC. The PIC16LF819 belongs to the broader PIC16 architecture family, which scales down to low-pin-count, low-power midrange devices and scales up toward enhanced PIC18 and PIC24 families. PIC MCUs use a RISC-based Harvard architecture with 35 single-word instructions, providing deterministic timing and ease of use for embedded developers.
Key features include 16 I/O pins, an integrated 10-bit ADC, an internal oscillator, and support for I2C and SPI communication peripherals. The device also offers an enhanced capture/compare/PWM module (ECCP), multiple timers, and nanoWatt power management with brown-out detect and ultra-low-power sleep modes for battery applications.
At the silicon level, the PIC16LF819 uses Microchip's CMOS Flash process technology with nanowatt-grade leakage control, allowing supply currents in the microamp range during sleep. The Flash program memory supports in-system serial programming (ICSP) and self-programming for field upgrades, while the 256-byte SRAM provides buffer storage for interrupt-driven control loops.
Typical applications include low-power sensor nodes, battery chargers, consumer appliances, industrial control panels, and handheld instrumentation. The wide 1.8V-3.6V range and integrated peripherals make it a frequent choice for compact embedded designs that need reliable performance and long-term supply.
When designing with this MCU, ensure decoupling capacitors (100nF plus 10uF bulk) are placed within 5mm of VDD, route the ICSP clock/data lines close together to avoid programming noise, and verify the unique ID match if anti-rollback is required. Compared with switching the system clock to a faster part, scaling software timing within the MCU's 35-instruction set is often the lowest-risk optimization path.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes that augment the Microchip datasheet for engineers selecting or replacing this device.
Drop-in alternatives for PIC16LF819T-I/ML — 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/ML (same form factor and footprint) — differing in Core Architecture, Package, ADC, Operating Temperature, Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF819-I/MLTSL
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →PIC16LF819-I/MLTSL
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →PIC16LF818T-I/ML
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC16LF819T-I/MLTSL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF818-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.28 / Unit
View Datasheet →PIC16LF819T-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Program Memory Type | Flash |
| Program Memory Size | 3.5 KB (2K x 14 words) |
| RAM Size | 256 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Clock | 20 MHz (10 MHz instruction rate) |
| Instruction Execution Time | 200 ns |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| Number of I/O Pins | 16 |
| Package Type | 28-pin QFN (6 x 6 mm) with exposed pad |
| Mounting Style | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Peripherals | ADC, ECCP, I2C, SPI, Timers |
| ADC | 10-bit, multiple channels |
| Lifecycle Stage | ACTIVE |
| RoHS Status | Compliant |
PIC16LF819T-I/ML Pin Configuration
| Pin 1 | RA2/AN2/CVref — PORTA bit 2, analog input 2, comparator reference |
| Pin 2 | RA3/AN3/Vref+ — PORTA bit 3, analog input 3, ADC Vref+ |
| Pin 3 | RA4/AN4/T0CKI — PORTA bit 4, analog input 4, Timer0 clock input |
| Pin 4 | RA5/AN5/SS — PORTA bit 5, analog input 5, SPI slave select |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RA7/OSC1/CLKIN — PORTA bit 7, oscillator input, external clock input |
| Pin 7 | RA6/OSC2/CLKOUT — PORTA bit 6, oscillator output, clock output |
| Pin 8 | RB0/INT — PORTB bit 0, external interrupt input |
| Pin 9 | RB1/SDI/SDA — PORTB bit 1, SPI data in or I2C data |
| Pin 10 | RB2/SDO — PORTB bit 2, SPI data out |
| Pin 11 | RB3/SCK/SCL — PORTB bit 3, SPI clock or I2C clock |
| Pin 12 | RB4 — PORTB bit 4 |
| Pin 13 | RB5/PGM — PORTB bit 5, low-voltage programming |
| Pin 14 | RB6/PGC — PORTB bit 6, ICSP clock |
| Pin 15 | RB7/PGD — PORTB bit 7, ICSP data |
| Pin 16 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Pin 17 | RC0 — PORTC bit 0 |
| Pin 18 | RC1 — PORTC bit 1 |
| Pin 19 | RC2/CCP1 — PORTC bit 2, capture/compare/PWM output 1 |
| Pin 20 | RC3 — PORTC bit 3 |
| Pin 21 | RC4 — PORTC bit 4 |
| Pin 22 | RC5 — PORTC bit 5 |
| Pin 23 | RC6 — PORTC bit 6 |
| Pin 24 | RC7 — PORTC bit 7 |
| Pin 25 | RE3/MCLR/VPP — PORTE bit 3, master clear reset, programming voltage |
| Pin 26 | RA0/AN0 — PORTA bit 0, analog input 0 |
| Pin 27 | RA1/AN1 — PORTA bit 1, analog input 1 |
| Pin 28 | VSS — Ground reference (also exposed pad tie) |
Typical Applications
PIC16LF819T-I/ML is suitable for 6 applications: Battery-Powered IoT Sensor Node, Consumer Remote Control / Handheld Device, Industrial Sensor Transmitter, Automatic Battery Charger Controller, Appliance Front-Panel Controller, Education and Hobbyist Embedded Development.
Battery-Powered IoT Sensor Node
The PIC16LF819T-I/ML is a strong fit for battery-powered wireless sensor nodes because it operates from 1.8 V to 3.6 V and supports nanoWatt sleep modes drawing microamp quiescent current. Its 10-bit ADC reads analog sensors while the MSSP block drives I2C or SPI to a low-power radio such as the MRF24J40 or LoRa SX1276. With 256 bytes of SRAM and 3.5 KB Flash, firmware fits even with a simple RTOS-equivalent scheduler, and the 28-QFN 6x6 mm package keeps PCB area minimal for coin-cell enclosures.
Recommended
Consumer Remote Control / Handheld Device
The PIC16LF819T-I/ML suits consumer handheld devices like TV remotes, IR learners, and small appliance controllers that need 16 I/O pins to drive key-scan matrices, IR LEDs, and status indicators. Running at 10 MHz with 200 ns instruction execution, the MCU can scan 4x4 keypads in microseconds while keeping CPU idle in sleep between button presses. The 256-byte RAM comfortably holds system state and IR protocol buffers, and the 28-QFN package is small enough to fit inside slim remote housings.
Recommended
Industrial Sensor Transmitter
The PIC16LF819T-I/ML fits industrial sensor transmitters where -40 C to +85 C industrial temperature grade, ECCP PWM, and a 10-bit ADC are needed in a small surface-mount footprint. The 10-bit ADC digitizes 4-20 mA loop or 0-10 V analog inputs, while I2C multiplexes a digital temperature sensor or EEPROM. The 28-QFN 6x6 mm with exposed pad helps thermal dissipation for sustained operation in sealed enclosures, and the 1.8-3.6 V range supports 24 V loop-powered architectures with regulator front-ends.
Recommended
Automatic Battery Charger Controller
The PIC16LF819T-I/ML is appropriate for low-power battery chargers of Li-ion, NiMH, or lead-acid cells where its 10-bit ADC monitors voltage and current while the ECCP module drives a switching MOSFET or linear regulator pass element. The Flash firmware lets designers implement CC/CV charge profiles, temperature-qualified charging, and indicator LED control from a single chip. The 1.8-3.6 V supply is wide enough to operate directly from a single Li-ion cell during the charge cycle, simplifying the analog front-end.
Recommended
Appliance Front-Panel Controller
The PIC16LF819T-I/ML drives front panels of white goods such as washing machines, microwaves, or HVAC thermostats where its 16 I/O pins handle key-scan, seven-segment or LED multiplex, and relay-driver enable lines. The integrated timers and PWM simplify triac phase-angle or zero-cross control for AC loads, while the I2C peripheral manages a real-time clock or EEPROM. Operating from 1.8-3.6 V, the MCU pairs cleanly with 3.3 V bias rails common in modern appliance designs.
Recommended
Education and Hobbyist Embedded Development
The PIC16LF819T-I/ML is widely used in low-cost educational kits and hobbyist boards because the 35-instruction PIC16 RISC architecture is approachable for beginners while still exposing real peripherals like 10-bit ADC, I2C, SPI, and PWM. Programming via ICSP using a PICkit 3 or PICkit 4 debugs in-circuit, supporting easy lab exercises in timer-driven blinking, ADC reading, and serial protocols. The 28-QFN footprint is compact, encouraging PCB design practice with a real-world industry-grade package while 3.5 KB Flash fits most student projects.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF819T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF819-I/ML | PIC16LF819-I/MLTSL | PIC16LF819T-I/MLTSL | PIC16LF818T-I/ML | PIC16LF818-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-28 (6x6 mm) | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same | QFN-28 (6x6 mm) - same |
| Program Memory (Flash) | 3.5 KB | 3.5 KB (same) | 3.5 KB (same) | 3.5 KB (same) | 1.5 KB (-57%) | 1.5 KB (-57%) |
| RAM | 256 bytes | 256 bytes (same) | 256 bytes (same) | 256 bytes (same) | 128 bytes (-50%) | 128 bytes (-50%) |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum Clock | 20 MHz / 10 MHz instruction | 20 MHz / 10 MHz instruction | 20 MHz / 10 MHz instruction | 20 MHz / 10 MHz instruction | 20 MHz / 10 MHz instruction | 20 MHz / 10 MHz instruction |
| Number of I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Lifecycle | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE |
Key Differentiators
- Low-voltage 1.8 V to 3.6 V operation with the smallest 28-QFN footprint (vs PIC16F876A)
- Drop-in 100% parametric match with tube-package PIC16LF819-I/ML (vs PIC16LF819-I/ML)
- More Flash memory than the lower-cost PIC16LF818T-I/ML (vs PIC16LF818T-I/ML)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 16) and a 10 uF bulk capacitor on the same net, sized for the use-case ripple. Brown-out detection must be enabled for battery-powered designs to prevent Flash corruption during VDD brownout; configure BOR in the configuration word to a trip voltage at or below the minimum VDD for your application per datasheet Section 4.
The 28-QFN (6x6 mm) package has an exposed thermal pad that must be soldered to a properly sized PCB thermal land, ideally tied to VSS via at least four thermal vias. Keep ICSP signal traces (PGC/PGD on RB6/RB7) within 100 mm of the programming connector, and avoid routing them parallel to switching signals to minimize in-circuit programming noise during debug.
The MSSP peripheral drives both I2C and SPI from pins RB1/SDI/SDA, RB2/SDO, RB3/SCK/SCL, and RA5/SS. Place 4.7 kohm pull-ups on SDA and SCL for I2C, route clock and data traces together with a ground reference, and keep the total bus capacitance below 400 pF to stay within standard-mode timing. For noise-prone environments, place a small ferrite bead or RC snubber near the connector.
Do not exceed the absolute maximum VDD of 3.6 V on the LF variant; if your design starts at 5 V use PIC16F819 instead. LVP (low-voltage programming) configuration word bit selection is critical - ensure LVP is disabled unless your toolchain explicitly enables it, otherwise pin RB5 may interfere with end-application use. Finally, configure unused I/O pins as outputs low to minimize power consumption.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 not applicable for standard industrial-grade part. Lead-free packaging is standard. Halogen-free status not explicitly stated in the retrieved data.
