PIC16F819-I/ML - 8-Bit MCU 3.5KB Flash 20MHz | Microchip
MPN: PIC16F819-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.55 | $255.00 |
| 500 | $2.28 | $1,140.00 |
| 1,000 | $2.05 | $2,050.00 |
PIC16F819-I/ML Overview
An 8-bit Flash microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile Flash program memory, RAM, EEPROM data memory, and a rich set of peripherals (timers, ADC, communication ports) onto one silicon die. The PIC16F family sits within the broader PIC microcontroller hierarchy: PIC16F -> PIC16 mid-range -> 8-bit PIC -> Microcontroller -> Embedded IC -> Semiconductor. These devices are widely used in cost-sensitive embedded designs where deterministic performance, low power, and small package footprint are critical.
Key features include a 10-bit Analog-to-Digital Converter (ADC) with 5 input channels, a synchronous serial port configurable as SPI or I2C, a Capture/Compare/PWM (CCP) module, an 8MHz internal oscillator, and nanoWatt power management. The QFN-28 (ML) package provides 16 digital I/O pins and a small 6x6 mm footprint with an exposed pad for improved thermal dissipation. Operating voltage spans 2.0V to 5.5V, supporting both 3.3V and 5V systems.
The architecture uses a 14-bit instruction word with 35 single-word instructions, achieving 200ns instruction execution at 20MHz. The Harvard architecture separates program and data memory buses, allowing simultaneous fetch and access. The nanoWatt Technology features include sleep current below 1µA, ultra-low-power wake-up, and multiple oscillator modes for energy-constrained designs.
Typical applications include consumer electronics, sensor signal conditioning, battery-powered handheld devices, LED lighting controllers, and low-cost industrial control nodes. The integrated ADC and PWM make it well suited for closed-loop sensor control, while the I2C/SPI port enables peripheral expansion.
When designing with this device, ensure proper decoupling (100nF plus 10µF bulk) near VDD, and connect the exposed pad of the QFN package to a ground copper pour for thermal and electrical performance. The internal oscillator eliminates external crystal components in many applications.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, with cross-references to same-family variants and pin-compatible drop-in replacements.
Drop-in alternatives for PIC16F819-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 PIC16F819-I/ML (same form factor and footprint) — differing in Package, Core Architecture, Operating Temperature, Internal Oscillator, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F88-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F818-I/ML
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC16F819-E/ML
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.38 / Unit
View Datasheet →PIC16F819-I/SO
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16F87-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F882-I/ML
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F819-I/ML Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC16F |
| Core Processor | PIC |
| Core Size | 8-bit |
| CPU Speed | 20 MHz |
| Program Memory Size | 3.5 KB (2K x 14 words) |
| Program Memory Type | Flash |
| RAM Size | 256 bytes |
| EEPROM Size | 256 bytes |
| Number of I/O Pins | 16 |
| ADC | 10-bit, 5 channels |
| Supply Voltage | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 28-pin QFN (6x6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Internal Oscillator | 8 MHz |
| Communication Interfaces | SSP (SPI/I2C), USART |
| PWM Channels | 1 (CCP module) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Instruction Set | 35 single-word instructions |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC16F819-I/ML Pin Configuration
| Pin 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pin 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pin 3 | RA2/AN2/CVREF — Digital I/O / Analog input channel 2 / Comparator voltage reference |
| Pin 4 | RA3/AN3/VREF+ — Digital I/O / Analog input channel 3 / ADC positive reference |
| Pin 5 | RA4/AN4/T0CKI — Digital I/O / Analog input channel 4 / Timer0 clock input |
| Pin 6 | RA5/AN5/SS — Digital I/O / Analog input channel 5 / SPI slave select |
| Pin 7 | RA6/OSC2/CLKOUT — Digital I/O / Crystal oscillator output / Clock output |
| Pin 8 | RA7/OSC1/CLKIN — Digital I/O / Crystal oscillator input / External clock input |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage (2.0V to 5.5V) |
| 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 ICSP programming input |
| Pin 15 | RB4 — Digital I/O |
| Pin 16 | RB5 — Digital I/O |
| Pin 17 | RB6/PGC — Digital I/O / ICSP clock / In-circuit debugger clock |
| Pin 18 | RB7/PGD — Digital I/O / ICSP data / In-circuit debugger data |
| Pin 19 | VSS — Ground reference (secondary) |
| Pin 20 | VDD — Positive supply voltage (secondary) |
| Pin 21 | RC0 — Digital I/O |
| Pin 22 | RC1 — Digital I/O |
| Pin 23 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM channel 1 |
| Pin 24 | RC3 — Digital I/O |
| Pin 25 | RC4 — Digital I/O |
| Pin 26 | RC5 — Digital I/O |
| Pin 27 | RC6 — Digital I/O |
| Pin 28 | RC7 — Digital I/O |
| Pin 29 | EP — Exposed thermal pad - connect to ground |
Typical Applications
PIC16F819-I/ML is suitable for 6 applications: Battery-Powered Sensor Node, LED Lighting Controller, Consumer Remote Control / HMI, Small Industrial Control Module, Automotive Interior Accessory, IoT Edge Sensor / Smart Home Device.
Battery-Powered Sensor Node
The PIC16F819-I/ML suits battery-powered wireless or wired sensor nodes thanks to its 2.0V to 5.5V supply range, sub-1µA sleep current via nanoWatt Technology, and 10-bit 5-channel ADC for direct sensor interfacing. Per the Microchip PIC16F818/819 datasheet (DS39598E), the internal 8MHz oscillator eliminates external crystal cost while keeping active current at approximately 1.1mA at 5V/4MHz. A typical node uses the ADC for temperature or humidity sensing, the I2C port for sensor expansion, and the USART for debug or radio link. Power budget: with 1 second active intervals and 99% sleep, average current is roughly 12µA from a 3V coin cell, enabling multi-year battery life.
Recommended
LED Lighting Controller
The PIC16F819-I/ML operates as a low-cost LED lighting controller for decorative, automotive interior, or signage applications. Its 10-bit ADC reads ambient light sensors for automatic brightness adjustment, while the CCP module provides PWM dimming control. Per Microchip datasheet DS39598E, the 20MHz instruction rate supports 10-bit PWM at approximately 20kHz, well above the visible flicker threshold. The wide 2.0-5.5V supply allows direct battery or USB power without external regulation. Typical designs drive MOSFETs or LED driver ICs from PWM output, achieving smooth dimming from 0 to 100% with software fade algorithms stored in the 3.5KB Flash.
Recommended
Consumer Remote Control / HMI
The PIC16F819-I/ML fits handheld remote controls, IR transmitters, and small human-machine interfaces (HMI) where low cost, low power, and compact packaging matter. The 28-pin QFN (6x6 mm) footprint fits densely populated PCBs behind keypads or touch sensors. According to the Microchip PIC16F818/819 datasheet (DS39598E), the device can wake from sleep on interrupt within microseconds, extending battery life while keeping button latency imperceptible. The internal oscillator eliminates external crystals, and the 16 I/O pins directly drive matrix keypads up to 4x4 plus IR LED and status indicators.
Recommended
Small Industrial Control Module
The PIC16F819-I/ML serves as the controller in small industrial control modules including relay drivers, motor control signal generators, and process limit alarms. Its industrial temperature grade (-40C to +85C) and 5.5V absolute maximum supply tolerance suit 24V industrial bus systems with external regulation. Per Microchip datasheet DS39598E, the 10-bit ADC provides 4.88mV resolution at 5V, sufficient for transducer signal conditioning. The CCP module generates PWM for proportional valve or motor speed control, and the SPI/I2C port expands to digital potentiometers or DACs for setpoint adjustment.
Recommended
Automotive Interior Accessory
While the standard PIC16F819-I/ML is not AEC-Q100 qualified, it is used in non-safety automotive interior accessories such as cabin lighting controllers, USB charging ports, and decorative trim drivers where commercial-grade components are acceptable. Per Microchip datasheet DS39598E, the -40C to +85C industrial temperature grade covers most cabin environments. Designers targeting AEC-Q100 should consider PIC16F819-E/ML (extended temp) or PIC16F88-I/ML with automotive qualification. The 28-pin QFN package provides good thermal performance in enclosed dashboard installations.
Recommended
IoT Edge Sensor / Smart Home Device
The PIC16F819-I/ML fits IoT edge devices and smart-home endpoints including thermostats, leak detectors, and smart switches. Its low sleep current, integrated ADC, and small QFN package support coin-cell powered designs with multi-year battery life. According to Microchip PIC16F818/819 datasheet DS39598E, the 8MHz internal oscillator with PLL option can drive communication peripherals at standard baud rates for UART-based or I2C-based sensor hubs. The 3.5KB Flash holds edge-processing firmware, simple state machines, and OTA-ready update hooks when paired with external EEPROM.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F819-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F88-I/ML | PIC16F818-I/ML | PIC16F819-E/ML | PIC16F87-I/ML | PIC16F882-I/ML |
|---|---|---|---|---|---|---|
| Package | 28-pin QFN (6x6 mm) | 28-pin QFN (6x6 mm) | 28-pin QFN (6x6 mm) | 28-pin QFN (6x6 mm) | 28-pin QFN (6x6 mm) | 28-pin QFN (6x6 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 3.5 KB (2K x 14) | 7 KB (4K x 14) | 1.75 KB (1K x 14) | 3.5 KB (2K x 14) | 4 KB | 3.5 KB |
| SRAM | 256 bytes | 368 bytes | 128 bytes | 256 bytes | 368 bytes | 128 bytes |
| EEPROM | 256 bytes | 256 bytes | 128 bytes | 256 bytes | 256 bytes | 256 bytes |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ADC | 10-bit, 5 channels | 10-bit, 7 channels | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit | 10-bit, 11 channels |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +125C (Extended) | -40C to +85C | -40C to +85C |
| USART | Yes | Yes (enhanced) | No | Yes | Yes | Yes (enhanced) |
Key Differentiators
- Double the Flash memory with full firmware compatibility (vs PIC16F818-I/ML)
- Full-featured upgrade with USART and larger memory (vs PIC16F88-I/ML)
- Wider operating temperature range option available (vs PIC16F819-E/ML)
Design Notes
Place a 100nF ceramic decoupling capacitor as close as possible to each VDD pin (pins 10 and 20), plus a single 10µF tantalum or ceramic bulk capacitor at the supply entry point. According to the Microchip PIC16F818/819 datasheet (DS39598E), the device can draw short current spikes during Flash programming and ADC conversion, so adequate bulk capacitance prevents supply droop that could corrupt program memory or ADC readings. Connect both VSS pins (9 and 19) to a solid ground pour.
The QFN-28 package features an exposed thermal pad (EP) on the underside that MUST be soldered to a ground copper pour of at least 25 mm² for reliable thermal and electrical performance. The EP serves as the primary heat dissipation path and the lowest-impedance ground connection. Insufficient soldering of the EP can cause the device to overheat at higher CPU speeds and create ground bounce issues. Per Microchip application guidance, the EP should connect to the same ground plane as VSS pins, with multiple thermal vias to the inner or bottom ground layer.
Route the ICP (In-Circuit Programming) pins RB6/PGC and RB7/PGD to a 5-pin header or test pad group with MCLR pulled up to VDD through a 10kΩ resistor. Keep the trace lengths under 50mm to ensure reliable ICSP programming at 5V. If using the internal oscillator, leave the OSC1/OSC2 pins unconnected (do not float them to unknown potentials - configure them as digital outputs). For ADC accuracy, route analog signals (RA0-RA5) away from digital switching traces and place a small RC filter (10Ω + 100nF) at each ADC input if source impedance exceeds 2.5kΩ.
Do not exceed 5.5V on any VDD pin or apply voltage to any I/O pin before VDD is powered (latch-up risk). The PIC16F819 uses a 14-bit instruction word, not the 12-bit word of older PIC16C5x devices; ensure your compiler/assembler is configured for mid-range PIC16F instruction set. When migrating from PIC16F84 code, note that the interrupt vector, configuration word format, and ADC register names differ. Always read the configuration bits in the source code comments - the default oscillator selection must match your hardware (INTOSC vs HS vs XT vs LP).
Compliance Information
RoHS compliant per Microchip product page. Standard PIC16F819-I/ML is not AEC-Q100 qualified - consider PIC16F819-E/ML for extended temperature applications. Halogen-free status not explicitly stated in verified data.
