PIC16F819-I/PTSL - 8-bit 20MHz MCU 3.5KB 16 I/O DIP-18
MPN: PIC16F819-I/PTSL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.86 | $28.60 |
| 100 | $2.41 | $241.00 |
| 500 | $2.07 | $1,035.00 |
| 1,000 | $1.78 | $1,780.00 |
PIC16F819-I/PTSL Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (SRAM), non-volatile data memory (EEPROM), and I/O peripherals on one die. The PIC16F819 belongs to the enhanced mid-range PIC16 8-bit RISC family with 35 single-word instructions at 200 ns instruction cycle, sitting in the hierarchy: PIC16F819 -> PIC16F8xx family -> PIC16 mid-range -> PIC microcontrollers -> 8-bit microcontrollers -> microcontrollers -> integrated circuits. It uses Harvard architecture with separate program and data buses.
Key features include an 8 MHz selectable internal oscillator, 5 channels of 10-bit Analog-to-Digital conversion, 1 capture/compare/PWM module, a Synchronous Serial Port (SSP) configurable as 3-wire SPI or 2-wire I²C, nanoWatt power management with multiple sleep modes, 16 digital I/O pins, and a wide 2.0V to 5.5V operating voltage range. The industrial (-I) temperature grade spans -40 °C to +85 °C. The TSSOP/SL package designation also implies Pb-free / lead-free termination consistent with current RoHS directives.
Architecturally the PIC16F819 combines a RISC 14-bit instruction set with 8-bit datapath, 2-stage pipeline, an 8-level hardware stack and interrupt controller with hardware context save/restore. The integrated 8 MHz internal oscillator is factory calibrated to ±1 % accuracy, removing the need for an external crystal in many designs and reducing BOM cost. The ADC can operate during sleep via an internal RC oscillator for low-power sensor sampling. The PWM module supports 10-bit resolution which is sufficient for LED dimming, motor control and simple analog synthesis.
Typical applications include consumer remote controls, low-end white goods, battery chargers, sensor interfaces, educational microcontroller kits, simple LED lighting controllers, security sensor peripherals and battery-powered handheld devices. The 16 I/O pins and ADC channels are well-matched to small appliances, multi-button interfaces and analog sensor hubs.
When designing with this part, ensure decoupling of VDD with at least 100 nF placed within 5 mm of the supply pin and consider an external crystal only when the on-chip 8 MHz oscillator is inadequate for UART or timing accuracy. The MCLR pin can be left tied to VDD through a 10 kΩ resistor if no in-circuit serial programming is required.
Drop-in alternatives for PIC16F819-I/PTSL — 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/PTSL (same form factor and footprint) — differing in Core Architecture, Timers, Package, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F819-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F819-E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F818-I/P
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16F818-E/P
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →PIC16F819-I/PTSL Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC® 16F |
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Instruction Set Width | 14-bit |
| Number of Instructions | 35 single-word |
| Maximum CPU Clock | 20 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| RAM | 256 bytes |
| EEPROM | 256 bytes |
| I/O Pins | 16 |
| ADC | 5 channels x 10-bit |
| PWM Channels | 1 (CCP module, 10-bit) |
| Timers | Timer0, Timer1, Timer2 |
| Communication | SSP (SPI / I²C) |
| Internal Oscillator | 8 MHz selectable, factory calibrated ±1% |
| Supply Voltage | 2.0 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C (Industrial -I) |
| Package | 18-PDIP (0.300 in / 7.62 mm) |
| Mounting Type | Through-Hole (THT) |
| Pin Count | 18 |
| Packaging Type | Tube (PTSL suffix) |
| RoHS Status | Compliant |
| MSL Level | 1 (unlimited) |
PIC16F819-I/PTSL Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 — Digital I/O / analog input 0 |
| Pin 3 | RA1/AN1 — Digital I/O / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — Digital I/O / analog input 2 / ADC negative reference |
| Pin 5 | RA3/AN3/VREF+ — Digital I/O / analog input 3 / ADC positive reference |
| Pin 6 | RA4/AN4 — Digital I/O / analog input 4 |
| Pin 7 | RA5/AN5/SS — Digital I/O / analog input 5 / SPI slave select |
| Pin 8 | VSS — Ground |
| Pin 9 | OSC1/CLKIN — External crystal input / external clock input |
| Pin 10 | OSC2/CLKOUT — External crystal output / clock output |
| Pin 11 | RB0/INT — Digital I/O / external interrupt |
| Pin 12 | RB1 — Digital I/O |
| Pin 13 | RB2 — Digital I/O |
| Pin 14 | RB3/PGM — Digital I/O / low-voltage programming |
| Pin 15 | RB4 — Digital I/O |
| Pin 16 | RB5 — Digital I/O |
| Pin 17 | RB6/ICSPCLK — Digital I/O / ICD serial clock |
| Pin 18 | RB7/ICSPDAT — Digital I/O / ICD serial data |
Typical Applications
PIC16F819-I/PTSL is suitable for 7 applications: Consumer Remote Control Transmitter, Battery Charger / Power Bank Controller, Sensor Hub / IoT Edge Device, White Goods & Home Appliance Control, LED Lighting Controller, Educational / Hobbyist Microcontroller Kit, Security Sensor Peripheral.
Consumer Remote Control Transmitter
The PIC16F819-I/PTSL suits consumer IR remote controls with 16 I/O driving a keypad matrix, 3.5 KB Flash holding protocol stacks, and 5 ADC channels for battery-voltage monitoring. The integrated 8 MHz internal oscillator eliminates the external resonator, lowering BOM cost. At 2.0 V to 5.5 V supply it runs directly from a single CR2032 coin cell or two AA cells. The CCP/PWM can drive an IR LED at 38 kHz carrier with 10-bit duty-cycle resolution for high-noise-immunity transmission.
Recommended
Battery Charger / Power Bank Controller
In a 1S Li-ion or NiMH charger, the PIC16F819-I/PTSL provides 5 ADC inputs for cell voltage, current-sense, NTC temperature and status LEDs. The CCP/PWM drives a switching FET at a programmable duty cycle. With 2.0 V to 5.5 V operation it runs directly from the cell stack. The 256-byte EEPROM stores charging profile parameters and capacity logs, while nanoWatt sleep modes cut quiescent current below 1 μA in standby. The internal oscillator removes the need for an external crystal.
Recommended
Sensor Hub / IoT Edge Device
An IoT sensor node benefits from the PIC16F819-I/PTSL's 5-channel 10-bit ADC, I²C/SPI SSP for sensor and radio modules, and nanoWatt sleep bringing quiescent current down for battery longevity. The 16 I/O drive status LEDs, buttons and interrupts. Programmable 8 MHz internal oscillator frees the design from external clock components. The 3.5 KB Flash accommodates small protocol stacks and periodic ADC sampling cycles at low average current.
Recommended
White Goods & Home Appliance Control
The PIC16F819-I/PTSL is well-matched to white-goods controllers (small washing machines, dishwashers, coffee machines) where 3.5 KB Flash runs a state machine, 5 ADC channels read temperature/water-level sensors, and PWM drives a triac/SSR for heater or pump control. Industrial -40 °C to +85 °C tolerance handles appliance environments. Industrial-grade reliability and 18-pin PDIP support simple, low-cost through-hole boards.
Recommended
LED Lighting Controller
LED dimming and color-mixing designs use the CCP/PWM module's 10-bit resolution for smooth dimming without flicker. With 16 I/O the PIC16F819-I/PTSL can drive RGBW channels plus a keypad or rotary encoder. The 5 ADC inputs read ambient-light sensors and supply voltage. Operating from 2.0 V to 5.5 V enables direct 3.3 V or 5 V supplies. Internal oscillator removes an external resonator, simplifying the BOM and reducing PCB area.
Recommended
Educational / Hobbyist Microcontroller Kit
The PIC16F819-I/PTSL in 18-pin PDIP is a classic teaching platform: through-hole package fits standard 18-pin DIP sockets and ZIF programmers, the internal oscillator lets students run code without crystal selection, and 3.5 KB Flash is large enough for UART, ADC, PWM and I²C labs. Industrial temperature grade is forgiving in lab environments. The PIC16 enhanced mid-range instruction set (35 instructions) is straightforward to learn, with abundant Microchip application notes, MPLAB X examples and ICD debugger support.
Recommended
Security Sensor Peripheral
PIR motion sensors, door/window contacts and smoke-detector peripherals can use the PIC16F819-I/PTSL for low-power analog monitoring, ADC sampling of PIR outputs, and event-driven interrupt on RB port-change. The nanoWatt sleep modes keep battery quiescent current minimal. The 256-byte EEPROM stores event counters and tamper flags across power-loss events. Industrial temperature grade supports outdoor enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F819-I/PTSL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F819-I/P | PIC16F819-E/P | PIC16F818-I/P | PIC16F818-E/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP (0.300 in / 7.62 mm) | 18-PDIP (same) | 18-PDIP (same) | 18-PDIP (same) | 18-PDIP (same) |
| Core / Family | PIC16 8-bit RISC, 14-bit instructions | PIC16 8-bit RISC (same) | PIC16 8-bit RISC (same) | PIC16 8-bit RISC (same) | PIC16 8-bit RISC (same) |
| Program Memory | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash |
| Internal Oscillator | Yes - 8 MHz selectable | Yes - 8 MHz | Yes - 8 MHz | No - external crystal required | No - external crystal required |
| Temperature Grade | -40 °C to +85 °C (Industrial -I) | -40 °C to +85 °C (I) | -40 °C to +125 °C (E) | -40 °C to +85 °C (I) | -40 °C to +125 °C (E) |
| I/O Pins | 16 | 16 | 16 | 16 | 16 |
| ADC Channels | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| 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 |
Key Differentiators
- On-chip 8 MHz internal oscillator factory calibrated to ±1% (vs PIC16F818-I/P)
- Industrial -40 °C to +85 °C operating range (vs PIC16F819-E/P)
- 5-channel 10-bit ADC with 1 CCP/PWM (vs PIC16F88)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of the VDD pin and a bulk 1-10 µF capacitor on the same supply rail. For battery-powered designs, route the MCLR pin through a 10 kΩ pull-up to VDD and avoid leaving it floating. The PIC16F819 nanoWatt sleep modes (Sleep, Idle) drop quiescent current below 1 µA typical with the ADC and Timer1 disabled, enabling multi-year coin-cell operation. Estimated: at 1 µA quiescent and 220 mAh CR2032, theoretical battery life is roughly 25 years; real-world is dominated by active-mode duty cycle and peripheral current.
When using the internal 8 MHz oscillator, leave OSC1 and OSC2 unconnected or route them as no-connect on the PCB. Configuration bits (CONFIG1H) must select INTOSC for correct operation. If UART or USB timing accuracy is required, fit an external crystal on OSC1/OSC2 (typically 4-20 MHz) and select HS or XT oscillator mode. The internal oscillator is factory calibrated to ±1 % at 5 V / 25 °C; for tighter frequency accuracy over temperature, periodically recalibrate using the OSCTUNE register against a Timer1 external reference.
Route the ICSP clock (RB6) and data (RB7) pins to a 5-pin header (or 6-pin with VPP/MCLR) for in-circuit serial programming and ICD debugging. Keep the ICSP traces short and avoid routing noisy signals near the OSC pins. For analog inputs, separate the analog traces from digital switching traces and ground the AGND pin (if used) close to the device. Estimated: trace capacitance of 5 pF/in on long analog lines can introduce 0.5-1 LSB error at the 10-bit ADC; keep analog traces < 50 mm where possible.
Do not exceed 5.5 V on VDD or apply voltage to any pin exceeding VDD+0.3 V (absolute maximum). When using the ADC, configure the TRISB/ADCON1 registers correctly so analog pins are set as analog inputs, not digital outputs. Always configure the watchdog timer (WDT) explicitly - leaving it on by default causes unexpected resets in long delay loops. For production, lock the configuration bits against accidental modification via the CONFIG register LOCK sequence.
Compliance Information
Pb-free / lead-free termination per Microchip product page; SL suffix denotes RoHS-compliant lead-free terminal finish. Not AEC-Q100 qualified - choose automotive / MVSS or -EP / SL grades for automotive.
