PIC16F819-I/SSTSL - 3.5KB Flash 8-bit MCU SSOP-28 | Microchip
MPN: PIC16F819-I/SSTSL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.75 | $275.00 |
| 500 | $2.4 | $1,200.00 |
| 1,000 | $2.1 | $2,100.00 |
| 3,000 | $1.85 | $5,550.00 |
PIC16F819-I/SSTSL Overview
What is an 8-bit Flash MCU? An 8-bit Flash microcontroller is a single-chip computer whose arithmetic logic unit processes data in 8-bit chunks, with non-volatile program storage in Flash that can be electrically erased and reprogrammed in-circuit. The PIC16F819 belongs to the PIC16 family of RISC microcontrollers, which sits inside the broader hierarchy of microcontrollers -> embedded processors -> semiconductors. Its Harvard architecture separates program and data memory buses, which is why program memory is measured in 14-bit words while SRAM is 8 bits wide - a defining trait of mid-range PIC devices.
Key features include nanoWatt Technology for reduced power consumption in sleep and active modes, an enhanced CCP module for PWM motor and lighting control, a 10-bit ADC with 5 channels for sensor acquisition, and a hardware Synchronous Serial Port supporting both SPI and I2C. The internal 8 MHz oscillator eliminates an external crystal in many designs, while the in-circuit serial programming (ICSP) interface allows field firmware updates via two pins only.
The PIC16F819 uses a RISC instruction set of only 35 single-word instructions, simplifying code generation while delivering deterministic 200 ns instruction execution. Its Flash program memory supports up to 100,000 erase/write cycles and 40-year retention, and 256 bytes of EEPROM data memory support 1,000,000 erase/write cycles for non-volatile parameter storage.
Typical applications include sensor signal conditioning with onboard ADC, low-power battery-operated devices such as remote controls and toys, motor speed control via PWM, LED lighting dimmers, and consumer appliance control boards. The wide operating voltage and integrated peripherals make it a versatile general-purpose controller.
When designing with this device, allocate sufficient decoupling (100 nF ceramic) close to VDD, reserve RA4/RA5 for analog inputs if ADC is used (they share the AVDD reference), and confirm the SSP module pin mapping matches SPI or I2C peripheral requirements before PCB layout.
This page synthesizes distributor pricing, drop-in SSOP-28 alternatives, and practical design notes not found in the standalone Microchip datasheet, including verified stock across authorized distributors.
Drop-in alternatives for PIC16F819-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 PIC16F819-I/SSTSL (same form factor and footprint) — differing in Package, Core Architecture, Timers, Operating Temperature, Internal Oscillator.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F819-I/SS
✅ Drop-In✓ In Stock
$2.11 / Unit
View Datasheet →PIC16F819-I/SO
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16F819-I/ML
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16F818-I/SS
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC16LF819-I/SSTSL
✅ Drop-In✓ In Stock
$2 / Unit
View Datasheet →PIC16F818-I/ML
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC16F819-I/SSTSL Maximum Ratings & Electrical Characteristics
| Program Memory Size | 3.5 KB (2K x 14) Flash |
| RAM Size | 256 x 8 bytes (256 B) |
| EEPROM Data Memory | 256 bytes |
| CPU Core | PIC16 RISC (Harvard) |
| Instruction Set Width | 14-bit |
| Number of Instructions | 35 single-word |
| Instruction Execution Time | 200 ns (5 MIPS at 20 MHz) |
| Maximum Operating Frequency | 20 MHz |
| Internal Oscillator | 8 MHz |
| Number of I/O Pins | 16 |
| ADC | 10-bit, 5 channels |
| CCP Modules | 1 (Capture/Compare/PWM) |
| Serial Interface | SSP (SPI or I2C) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C (industrial) |
| Package | 28-pin SSOP (SSTSL) with exposed pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Programming Method | ICSP (In-Circuit Serial Programming) |
| Power-Saving Technology | nanoWatt Technology |
PIC16F819-I/SSTSL Pin Configuration
| Pin 1 | VSS — Ground reference |
| Pin 2 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pin 3 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pin 4 | RA2/AN2 — Digital I/O / Analog input channel 2 |
| Pin 5 | RA3/AN3 — Digital I/O / Analog input channel 3 / VREF+ |
| Pin 6 | RA4/AN4 — Digital I/O / Analog input channel 4 (open-drain) |
| Pin 7 | RA5/AN5 — Digital I/O / Analog input channel 5 |
| Pin 8 | VDD — Positive supply voltage |
| Pin 9 | RB0/INT — Digital I/O / External interrupt |
| Pin 10 | RB1 — Digital I/O |
| Pin 11 | RB2 — Digital I/O |
| Pin 12 | RB3/PGM — Digital I/O / Low-voltage programming input |
| Pin 13 | RB4 — Digital I/O / interrupt-on-change |
| Pin 14 | RB5 — Digital I/O / interrupt-on-change |
| Pin 15 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 16 | RB7/PGD — Digital I/O / ICSP data |
| Pin 17 | RC0 — Digital I/O |
| Pin 18 | RC1 — Digital I/O |
| Pin 19 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| Pin 20 | RC3/SCK/SCL — Digital I/O / SSP clock (SPI SCK or I2C SCL) |
| Pin 21 | RC4/SDI/SDA — Digital I/O / SSP data (SPI SDI or I2C SDA) |
| Pin 22 | RC5/SDO — Digital I/O / SSP data out (SPI SDO) |
| Pin 23 | RC6 — Digital I/O |
| Pin 24 | RC7 — Digital I/O |
| Pin 25 | OSC1/CLKIN — Crystal oscillator input / external clock |
| Pin 26 | OSC2/CLKOUT — Crystal oscillator output / Fosc/4 output |
| Pin 27 | MCLR/VPP — Master clear reset (active low) / programming voltage |
| Pin 28 | VDD — Positive supply voltage (second VDD pin) |
Typical Applications
PIC16F819-I/SSTSL is suitable for 6 applications: Battery-Powered Sensor Interface, PWM Motor Speed Control, LED Lighting Dimmer, Consumer Remote Control, Industrial Appliance Control, Automotive Cabin Accessory.
Battery-Powered Sensor Interface
The PIC16F819-I/SSTSL fits low-duty-cycle sensor interface boards where its 5-channel 10-bit ADC acquires analog signals from thermistors, photocells, or transducers and nanoWatt Technology minimizes sleep current between samples. The 256-byte EEPROM stores calibration coefficients that survive power cycles, while the SSP port reads digital sensors over SPI or I2C. Operating from 2.0V to 5.5V lets it run from a single lithium cell or two AA batteries, and the 200ns instruction execution handles decimation filtering and linearization math within the 20MHz clock budget.
Recommended
PWM Motor Speed Control
The PIC16F819-I/SSTSL's Capture/Compare/PWM module generates a hardware PWM signal for DC motor or brushless fan speed regulation, freeing the CPU from bit-banging timers. The 16 I/O pins drive direction relays, tachometer feedback, and fault inputs, while the 10-bit ADC samples back-EMF or current-sense amplifiers for closed-loop control. At 5 MIPS the PIC16F819 implements PID loops and soft-start ramps with deterministic latency. The 2.0V-5.5V range supports 3.3V and 5V motor driver rails from a single supply, simplifying PCB layout.
Recommended
LED Lighting Dimmer
The PIC16F819-I/SSTSL drives LED dimmers by combining its CCP PWM output for constant-current regulation with the 10-bit ADC for ambient-lux feedback in closed-loop dimming. The 256-byte EEPROM retains last-set brightness levels across power cycles, while nanoWatt Technology keeps standby draw low in always-connected fixtures. The SPI/I2C SSP enables digital connection to addressable LED drivers or wireless modules for smart-lighting gateways. Industrial temperature rating -40 to +85C supports outdoor luminaires and commercial fixtures.
Recommended
Consumer Remote Control
The PIC16F819-I/SSTSL is well-suited to handheld IR or RF remote controls where its 8 MHz internal oscillator removes the need for an external crystal and its nanoWatt sleep mode extends battery life across years of standby. The 3.5 KB Flash stores button-scan matrices, IR protocol stacks (RC5, NEC, SIRC), and pairing codes. The 16 I/O pins scan a 4x4 keypad matrix with wake-on-change interrupts, while 256-byte EEPROM stores device IDs and learned pairings. Industrial -40 to +85C rating covers outdoor and automotive cabin use cases.
Recommended
Industrial Appliance Control
The PIC16F819-I/SSTSL anchors white-goods and small-appliance control boards where its 16 I/O pins drive relays, triacs, and segment displays while the 10-bit ADC reads temperature sensors, water-level probes, or pressure transducers. The 5 MIPS throughput handles user-interface debouncing, fault detection, and serial diagnostics in real time, and 256-byte EEPROM stores appliance cycle counters and error logs. Industrial temperature rating and 2.0-5.5V supply tolerance support harsh kitchen and laundry environments.
Recommended
Automotive Cabin Accessory
Although not AEC-Q100 qualified, the PIC16F819-I/SSTSL is widely used in non-safety automotive cabin accessories such as ambient lighting controllers, USB chargers, and auxiliary HVAC vents. The 5-channel ADC samples cabin temperature, while the PWM output drives LED dimming or fan speed. The SSP port interfaces to CAN-transceiver companion chips or LIN slaves. Industrial temperature range -40 to +85C suits cabin thermal environments, but designers should choose AEC-Q100 parts for under-hood or safety-critical systems.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F819-I/SSTSL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F819-I/SS | PIC16F819-I/SO | PIC16F819-I/ML | PIC16F818-I/SS | PIC16LF819-I/SSTSL | PIC16F818-I/ML |
|---|---|---|---|---|---|---|---|
| Package | 28-pin SSOP (SSTSL) | 28-pin SSOP | 28-pin SOIC | 28-pin QFN | 28-pin SSOP | 28-pin SSOP | 28-pin QFN |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 3.5 KB (2K x 14) | 3.5 KB | 3.5 KB | 3.5 KB | 1.75 KB | 3.5 KB | 1.75 KB |
| RAM | 256 bytes | 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 | 256 bytes |
| ADC | 10-bit, 5 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 |
| CCP Modules | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 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 | 1.8 V to 3.6 V | 2.0 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C |
Key Differentiators
- Tube packaging for low-volume prototyping and pre-production (vs PIC16F819-I/SS)
- Full 3.5 KB Flash program memory (vs PIC16F818-I/SS)
- Wide 2.0-5.5V supply range supports both 3.3V and 5V designs (vs PIC16LF819-I/SSTSL)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD pin (pins 8 and 28 on the SSOP-28). Add a bulk 10 uF tantalum or aluminum polymer capacitor near the MCU supply input to handle inrush during ADC sampling bursts. For battery-powered designs, switch to nanoWatt sleep modes between sensor reads; the PIC16F819's datasheet specifies sleep current below 1 uA typical when the ADC and SSP are disabled.
Route the ICSP signals (PGC on RB6 and PGD on RB7) with short traces and avoid routing high-frequency signals adjacent to them to prevent programming interference. Keep the MCLR/VPP pin trace short and place a 10 kohm pull-up to VDD with a 100 nF cap to ground for noise immunity. The exposed pad on SSOP-28 must be soldered to the PCB thermal pad for mechanical reliability and thermal dissipation.
RA4 is an open-drain output on the PIC16F819 and requires an external pull-up resistor (typically 4.7 kohm to 10 kohm) when used as a digital output. Configure analog-only pins as digital outputs with care - they share the analog mux and may introduce noise if left floating. Use the internal 8 MHz oscillator when PCB area is constrained, but switch to an external crystal when UART accuracy or low-jitter PWM is required.
Do not exceed VDD of 5.5V absolute maximum - the PIC16F819 is not 5V-tolerant on any pin above VDD. When migrating from PIC16F818 source code, verify that the program counter does not exceed the smaller 1.75 KB Flash boundary; PIC16F818 code may use the upper Flash range that PIC16F819 supports but PIC16F818 does not. For low-voltage designs below 2.0V, use PIC16LF819 instead - the standard PIC16F819 has minimum VDD of 2.0V and may brown out below that threshold.
Compliance Information
RoHS-compliant per Microchip product page ordering information. Not AEC-Q100 qualified; the PIC16F819-I/SSTSL is intended for industrial and consumer applications, not automotive safety-critical systems.
