PIC16LF819-I/SSTSL - 8-bit MCU, 3.5KB Flash, 16 I/O | Microchip
MPN: PIC16LF819-I/SSTSL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.55 | $255.00 |
| 500 | $2.25 | $1,125.00 |
| 1,000 | $2 | $2,000.00 |
PIC16LF819-I/SSTSL Overview
Key features include an internal oscillator, a 10-bit Analog-to-Digital Converter (ADC) with up to 5 channels, one Capture/Compare/PWM (CCP) module, a synchronous serial port (SSP) supporting SPI and I2C, and a USART for asynchronous serial communication. The device also integrates a 256-byte EEPROM data area, two 8-bit timers plus one 16-bit timer, and a watchdog timer for safety-critical applications.
The PIC16LF819 belongs to the mid-range PIC16 family, a category of 8-bit Harvard-architecture RISC microcontrollers known for their deterministic instruction set, single-cycle execution at the system clock rate, and rich peripheral integration. PIC16 mid-range MCUs are widely used in cost-sensitive embedded designs that need more capability than 8-bit baseline parts but don't justify moving to 16-bit dsPIC or 32-bit ARM Cortex devices.
The architecture combines a 14-bit instruction word with separate program and data buses, allowing simultaneous access and yielding throughput close to one instruction per clock cycle. The 20-pin SSOP package offers a small footprint suitable for compact products while preserving enough I/O for typical mixed-signal interfacing tasks.
Typical applications include consumer white goods and small appliances, low-cost sensor conditioning boards, battery-powered instrumentation, simple motor-control loops using the CCP/PWM module, and user-interface controllers in industrial equipment. The on-chip ADC and PWM make it well-suited to closed-loop LED lighting and thermostat-style control loops.
When designing with this device, pay attention to the LF voltage range (2.0V to 5.5V) versus the standard PIC16F819 (2.0V to 5.5V), confirm oscillator configuration in the configuration words, and ensure the ICD pins are reserved if in-circuit debugging is required. The SSOP-20 footprint is also available in tape-and-reel packaging for high-volume assembly.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes - complementary context not always present on the manufacturer datasheet alone.
Drop-in alternatives for PIC16LF819-I/SSTSL — 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/SSTSL (same form factor and footprint) — differing in Package, Internal Oscillator, Program Memory (Flash), Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF819-I/SS
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16LF819T-I/SSTSL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF818-I/SSTSL
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16LF819-I/SOTSL
✅ Drop-In✓ In Stock
$3.75 / Unit
View Datasheet →PIC16LF818T-I/SSTSL
✅ Drop-In✓ In Stock
$1.6 / Unit
View Datasheet →PIC16LF819-I/SSTSL Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC mid-range (Harvard, RISC) |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| Data SRAM | 256 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Clock | 10 MHz |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Number of I/O Pins | 16 |
| ADC | 10-bit, up to 5 channels |
| Timers | 2 x 8-bit + 1 x 16-bit |
| CCP/PWM Modules | 1 |
| Serial Interfaces | SSP (SPI / I2C), USART (async) |
| Oscillator | Internal + external crystal options |
| Watchdog Timer | Yes |
| Package | 20-pin SSOP |
| Operating Temperature | -40 C to +85 C (industrial) |
| Instruction Set Width | 14 bits |
| RoHS Status | Compliant |
PIC16LF819-I/SSTSL Pin Configuration
| Pin 1 | RA2/AN2/CVREF/VREF- — Port A bit 2 / ADC input 2 / CVREF reference / VREF- |
| Pin 2 | RA3/AN3/VREF+ — Port A bit 3 / ADC input 3 / VREF+ |
| Pin 3 | RA4/AN4/T0CKI — Port A bit 4 / ADC input 4 / Timer0 clock input |
| Pin 4 | RA5/MCLR/VPP — Port A bit 5 / Master Clear (reset) / Programming voltage |
| Pin 5 | VSS — Ground |
| Pin 6 | RB0/INT/CCP1 — Port B bit 0 / External interrupt / CCP1 PWM output |
| Pin 7 | RB1 — Port B bit 1 |
| Pin 8 | RB2 — Port B bit 2 |
| Pin 9 | RB3/PGM — Port B bit 3 / Low-voltage programming |
| Pin 10 | RB4/SCK/SCL — Port B bit 4 / SPI clock / I2C clock |
| Pin 11 | RB5/SDI/SDA — Port B bit 5 / SPI data in / I2C data |
| Pin 12 | RB6/ICSPCLK — Port B bit 6 / In-circuit serial programming clock |
| Pin 13 | RB7/ICSPDAT — Port B bit 7 / In-circuit serial programming data |
| Pin 14 | VDD — Positive supply (2.0 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT/RA6 — Oscillator output / Clock output / Port A bit 6 |
| Pin 16 | OSC1/CLKIN/RA7 — Oscillator input / Clock input / Port A bit 7 |
| Pin 17 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator out / Timer1 clock in |
| Pin 18 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator in / CCP2 |
| Pin 19 | RC2/CCP1 — Port C bit 2 / CCP1 PWM output |
| Pin 20 | RC3 — Port C bit 3 |
Typical Applications
PIC16LF819-I/SSTSL is suitable for 6 applications: Battery-Powered Sensor Conditioning, Small Appliance and White-Goods Control, LED Lighting and Dimming Controllers, Industrial Sensor and Process-Loop Interfaces, User-Interface and HMI Front Panels, Automotive Interior and Accessory Modules.
Battery-Powered Sensor Conditioning
The PIC16LF819-I/SSTSL's 2.0V to 5.5V wide supply range lets it run directly from two-cell alkaline or three-cell NiMH battery stacks without a regulator, and its 10-bit 5-channel ADC digitizes thermistor, photodiode, or strain-gauge signals on a single chip. The PIC mid-range core executes a single instruction per clock cycle, keeping active-mode current low enough that duty-cycled sampling extends battery life into multi-year ranges. Using the internal oscillator eliminates external crystal cost and the low-power Sleep mode further reduces quiescent draw between measurements.
Recommended
Small Appliance and White-Goods Control
Consumer appliances such as coffee machines, microwave ovens, and washing machines need an inexpensive 8-bit MCU with PWM for motor or heater control and ADC for temperature sensing - exactly the PIC16LF819-I/SSTSL feature set. The CCP/PWM module drives a TRIAC or MOSFET power stage for heating-element control, while the ADC reads NTC thermistor feedback for closed-loop regulation. The 20-pin SSOP package fits inside compact product enclosures and the industrial temperature grade supports kitchen and laundry environments.
Recommended
LED Lighting and Dimming Controllers
The PIC16LF819-I/SSTSL drives constant-current LED strings via its CCP/PWM output and regulates brightness from a potentiometer or ambient-light sensor input on the 10-bit ADC. PWM frequencies up to several kHz avoid flicker while allowing smooth dimming, and the SSP module can interface to digital LED driver ICs or DMX-style lighting control buses. The wide VDD range supports both 3.3V logic-level designs and 5V analog dimmer interfaces.
Recommended
Industrial Sensor and Process-Loop Interfaces
Industrial 4-20 mA loop-powered transmitters and remote sensor nodes use the PIC16LF819-I/SSTSL for signal conditioning, linearization, and digital communication over RS-485 or I2C. The 10-bit ADC digitizes bridge, RTD, or thermocouple signals, while the integrated USART supports Modbus RTU or proprietary protocols. The 2.0V minimum supply enables operation from loop-powered or energy-harvesting rails.
Recommended
User-Interface and HMI Front Panels
Low-cost HMI panels with push-buttons, rotary encoders, and character LCDs use the PIC16LF819-I/SSTSL to scan key matrices, drive displays, and communicate with a host controller over SPI or USART. Sixteen I/O pins support up to 16 buttons or 8 multiplexed 7-segment digits, and the SSP module streams display updates to companion driver ICs. The internal oscillator removes external timing components.
Recommended
Automotive Interior and Accessory Modules
Body-electronics accessories such as ambient lighting, seat heaters, mirror controllers, and auxiliary displays can use the PIC16LF819-I/SSTSL for cost-sensitive sub-modules where AEC-Q100 qualification is delegated to a system-level gateway. The CCP/PWM controls LED drivers or small DC motors, the ADC reads trim switches and temperature sensors, and the USART/SSP links the module to a CAN or LIN transceiver via SPI. The industrial -40C to +85C temperature range covers most cabin environments.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF819-I/SSTSL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF819-I/SS | PIC16LF819T-I/SSTSL | PIC16LF818-I/SSTSL | PIC16LF819-I/SOTSL | PIC16LF818T-I/SSTSL |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP | 20-pin SSOP (same) | 20-pin SSOP (same) | 20-pin SSOP (same) | 20-pin SSOP (same) | 20-pin SSOP (same) |
| Program Memory (Flash) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 1.75 KB (1K x 14) | 3.5 KB (2K x 14) | 1.75 KB (1K x 14) |
| Data SRAM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Data EEPROM | 256 B | 256 B | 256 B | 128 B | 256 B | 128 B |
| Maximum CPU Clock | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 10 MHz |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| ADC Resolution / Channels | 10-bit / 5 ch | 10-bit / 5 ch | 10-bit / 5 ch | 10-bit / 5 ch | 10-bit / 5 ch | 10-bit / 5 ch |
Key Differentiators
- Identical SSOP-20 footprint and electrical specs as PIC16LF819-I/SS (vs PIC16LF819-I/SS)
- Larger Flash and EEPROM than PIC16LF818 family (vs PIC16LF818-I/SSTSL)
- Wide 2.0 V to 5.5 V supply vs typical 5 V-only mid-range PICs (vs PIC16F819 (non-LF))
Design Notes
The PIC16LF819-I/SSTSL operates from 2.0 V to 5.5 V and supports Sleep mode with wake-up on interrupt. Estimated: at 4 MHz internal oscillator and 5 V supply, active current is approximately 0.5 mA per datasheet; Sleep current drops below 1 uA. Add a 100 nF ceramic decoupling capacitor close to VDD and a 10 uF bulk capacitor if the supply source has any impedance.
The 20-pin SSOP package has a 0.65 mm pin pitch. Reserve the PGD (RB7) and PGC (RB6) pins for in-circuit serial programming (ICSP) - do not strap them directly to VDD or GND through low-impedance paths. Place the ICSP connector footprint at the board edge or in an accessible test-pad area to simplify programming and debugging with PICkit or MPLAB ICD tools.
Configuration-word settings (oscillator source, watchdog timer enable, brown-out reset threshold, code protection) must be set explicitly - the device does not default to safe values for all applications. Estimated: failure to enable the internal oscillator correctly is the most common reason for 'dead' PIC16LF819 prototypes. Always read the configuration bits in code and verify with MPLAB X IDE before programming production parts.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified; for automotive designs, choose AEC-Q100-qualified PIC16F counterparts or system-level qualification through a gateway ECU.
