PIC16F819-E/ML - 8-Bit 20MHz 3.5KB Flash MCU 28-QFN | Microchip
MPN: PIC16F819-E/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.29 | $4.29 |
| 10 | $3.78 | $37.80 |
| 100 | $3.21 | $321.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.38 | $2,380.00 |
PIC16F819-E/ML Overview
What is an 8-bit Flash microcontroller? It is a small computing device integrating a CPU, non-volatile Flash program memory, RAM, peripherals, and I/O on a single die. PIC16F microcontrollers sit in the PIC microcontroller hierarchy as: PIC16F -> mid-range 8-bit MCU family -> microcontroller -> embedded computing device -> semiconductor. Compared with 16-bit or 32-bit MCUs, 8-bit Flash parts like the PIC16F819 deliver deterministic instruction execution, low cost, and ultra-low standby current via Microchip's nanoWatt technology - making them ideal for cost-sensitive and battery-powered embedded designs.
Key features of the PIC16F819 include an 8 MHz internal oscillator that eliminates the need for an external crystal in many designs, a 10-bit Analog-to-Digital converter with 5 input channels, one Capture/Compare/PWM (CCP) module, a synchronous serial port configurable as 3-wire SPI or 2-wire I2C, and nanoWatt power management with multiple sleep modes. The 28-QFN package enables compact PCB layouts while the exposed pad improves thermal dissipation for higher current GPIO loads.
Typical applications span consumer appliances, sensor conditioning nodes, LED lighting controllers, automotive body electronics, battery chargers, and small motor control loops. The wide 4V to 5.5V supply range and 16 I/O pins make the part flexible for both 5V legacy systems and modern mixed-signal boards. Designers should budget for the ICSP programming header (PGD/PGC) and the MCLR reset circuit, as required by all PIC16F mid-range devices. This page synthesizes distributor pricing, drop-in alternatives from the same family, and practical design notes that go beyond the manufacturer datasheet.
Drop-in alternatives for PIC16F819-E/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-E/ML (same form factor and footprint) — differing in Package, Internal Oscillator, Operating Temperature, Core Architecture, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F818-E/ML
✅ Drop-In✓ In Stock
$1.73 / Unit
View Datasheet →PIC16F819-I/ML
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16F818-I/ML
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC16F88-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F819-E/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16F (8-bit RISC, mid-range) |
| Maximum CPU Speed | 20 MHz (5 MIPS) |
| Flash Program Memory | 3.5 KB (2K x 14 words) |
| SRAM Data Memory | 256 bytes |
| EEPROM Data Memory | 256 bytes |
| Digital I/O Pins | 16 |
| ADC | 10-bit, 5 channels |
| CCP Modules | 1 (Capture/Compare/PWM) |
| Serial Interfaces | 1x SSP (SPI or I2C) |
| Internal Oscillator | 8 MHz |
| Supply Voltage | 4 V to 5.5 V |
| Operating Temperature | -40C to +125C (E = extended) |
| Package | 28-pin QFN (VQFN) 6x6 mm with exposed pad |
| Mounting Type | Surface Mount |
| Power-Saving Mode | nanoWatt Technology |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| RoHS Status | Compliant |
PIC16F819-E/ML Pin Configuration
| Pin 1 | RA0/AN0 — Digital I/O / ADC channel 0 |
| Pin 2 | RA1/AN1 — Digital I/O / ADC channel 1 |
| Pin 3 | RA2/AN2/VREF- — Digital I/O / ADC channel 2 / ADC negative reference |
| Pin 4 | RA3/AN3/VREF+ — Digital I/O / ADC channel 3 / ADC positive reference |
| Pin 5 | RA4/AN4/T0CKI — Digital I/O / ADC channel 4 / Timer0 clock input |
| Pin 6 | RA5/AN5/SS — Digital I/O / ADC channel 5 / SPI slave select |
| Pin 7 | RA6/OSC2/CLKOUT — Digital I/O / crystal oscillator output / CLKOUT |
| Pin 8 | RA7/OSC1/CLKIN — Digital I/O / crystal oscillator input / CLKIN |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply (4V-5.5V) |
| Pin 11 | RB0/INT — Digital I/O / external interrupt |
| Pin 12 | RB1/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Pin 13 | RB2/SDO — Digital I/O / SPI data out |
| Pin 14 | RB3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Pin 15 | RB4/PGM — Digital I/O / low-voltage programming |
| Pin 16 | RB5 — Digital I/O |
| Pin 17 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 18 | RB7/PGD — Digital I/O / ICSP data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply (4V-5.5V) |
| Pin 21 | RC0 — Digital I/O |
| Pin 22 | RC1 — Digital I/O |
| Pin 23 | RC2/CCP1 — Digital I/O / Capture Compare PWM output |
| 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 |
Typical Applications
PIC16F819-E/ML is suitable for 6 applications: Consumer Appliance Control, Battery-Powered Sensor Node, Automotive Body Electronics, LED Lighting Controller, Industrial Control Front Panel, Small DC Motor Speed Controller.
Consumer Appliance Control
The PIC16F819-E/ML fits consumer appliance controllers such as coffee makers, microwave ovens, and washing machines because its 16 I/O pins easily drive keypads, relay coils, seven-segment displays, and triac optoisolators while its 10-bit 5-channel ADC reads temperature sensors and current shunts. The nanoWatt technology enables standby currents below 1 uA, which is critical for ENERGY STAR compliance. With 3.5 KB Flash and 256 bytes EEPROM, the firmware can store user presets across power cycles without external memory. The 28-QFN package sits comfortably on a compact main board where mechanical space is constrained.
Recommended
Battery-Powered Sensor Node
The PIC16F819-E/ML is well suited for battery-powered wireless sensor endpoints where its nanoWatt sleep modes reduce quiescent current to under 1 uA, allowing multi-year life on a single coin cell. The integrated 8 MHz internal oscillator eliminates the external crystal, reducing BOM cost and board area - critical for compact sensor PCBs. Five ADC channels with 10-bit resolution are sufficient for thermistor, photocell, or soil-moisture sensor reads. Combined with the on-chip CCP module, the part can also measure pulse widths from ultrasonic or PIR sensors without external timing components.
Recommended
Automotive Body Electronics
The PIC16F819-E/ML operates across the -40C to +125C extended industrial temperature range required by most under-hood and cabin automotive subsystems such as HVAC flap controllers, mirror positioners, and seat-adjust modules. While not AEC-Q100 qualified itself, the device is widely used in non-safety automotive body electronics. Its 16 GPIO lines drive LEDs, H-bridge enable signals, and switch inputs, while the 10-bit ADC reads battery voltage dividers and current sense resistors. The 28-QFN package with exposed pad provides reliable thermal performance in sealed enclosures.
Recommended
LED Lighting Controller
The PIC16F819-E/ML can act as the brains of an architectural or decorative LED driver: the on-chip CCP module generates PWM dimming signals up to 10-bit resolution, while the 5 ADC channels monitor ambient light sensors and current feedback for constant-lumen output. The 20 MHz instruction rate supports smooth PWM dimming with 1024 steps at a refresh frequency above 200 Hz, eliminating flicker. Because each I/O can sink 25 mA, multiple LED strings can be driven directly with simple current-limit resistors. The 4V-5.5V supply range matches standard 5V LED-driver rails.
Recommended
Industrial Control Front Panel
For industrial HMI front panels, the PIC16F819-E/ML interfaces with matrix keypads, character LCDs, and indicator LEDs through its 16 GPIO lines. The I2C/SPI peripheral talks to external EEPROM for parameter storage and to a DAC for analog setpoint outputs, while the ADC reads panel potentiometers and 4-20 mA loop signals scaled to 0-5V. The 256-byte SRAM buffers keystroke events, and 256-byte EEPROM retains user-configured setpoints across power cycles. Extended temperature operation handles cabinet interiors near power electronics.
Recommended
Small DC Motor Speed Controller
The PIC16F819-E/ML's 10-bit ADC and CCP PWM module make it a capable single-quadrant DC motor speed controller for fans, pumps, and small appliances. The ADC reads back-EMF or shunt-derived current, while the CCP generates PWM at a fixed frequency to vary the motor's average voltage. Closed-loop PI control runs easily within 3.5 KB Flash and 256 B SRAM. The 28-QFN footprint fits inside fan-hub PCBs, and the extended temperature grade supports enclosed motor housings that can reach 85C or higher.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F819-E/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F818-E/ML | PIC16F819-I/ML | PIC16F818-I/ML | PIC16F88-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6) | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same |
| Flash Program Memory | 3.5 KB | 1.75 KB (-50%) | 3.5 KB (same) | 1.75 KB (-50%) | 7 KB (+100%) |
| SRAM | 256 B | 128 B (-50%) | 256 B (same) | 128 B (-50%) | 368 B (+44%) |
| EEPROM | 256 B | 128 B (-50%) | 256 B (same) | 128 B (-50%) | 256 B (same) |
| Max CPU Speed | 20 MHz | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) |
| ADC Channels | 5 (10-bit) | 5 (10-bit) | 5 (10-bit) | 5 (10-bit) | 7 (10-bit) |
| Operating Temperature | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| USART | No | No | No | No | Yes |
Key Differentiators
- Extended -40C to +125C operating temperature grade (vs PIC16F819-I/ML)
- Doubles Flash and SRAM versus PIC16F818 (vs PIC16F818-E/ML)
- Lower cost and simpler design versus PIC16F88 (vs PIC16F88-I/ML)
Design Notes
The PIC16F819-E/ML requires a stable 4.0 V to 5.5 V supply; bulk-decouple VDD with a 10 uF tantalum or ceramic and a 100 nF ceramic placed within 5 mm of the VDD pins (pins 10 and 20). Both VDD pins must be connected, and both VSS pins (9 and 19) must be grounded to prevent latch-up. Add a 100 nF cap on MCLR to filter noise and enable the internal pull-up when not using a manual reset switch.
The exposed thermal pad on the 28-QFN must be soldered to a ground copper pour of at least 25 mm^2 for mechanical reliability and thermal dissipation. Without a soldered pad the QFN can crack under mechanical stress. Use an array of thermal vias (8-12, 0.3 mm diameter) under the pad to connect the top-side ground pour to an internal ground plane, improving both thermal performance and EMI.
Keep the ICSP programming header (PGD on pin 18, PGC on pin 17, MCLR on pin 1) accessible on the PCB edge or test pad array so that production programming is possible without rework. Route analog traces (RA0-RA5) away from switching digital lines (RC0-RC7, oscillator pins) to avoid ADC noise coupling. Use a guard ring around the analog traces connected to ground if the ADC accuracy is critical.
Configuration bits (fuses) must be set correctly in the source code: disable the Watchdog Timer (WDT) if not used, select INTOSCIO or HS oscillator mode to match your hardware, and enable the Brown-out Reset (BOR) at a voltage appropriate for your supply (2.0V or 4.0V). Failing to enable BOR can lead to erratic behavior at low supply voltages. Also note that the analog pins default to analog mode at reset; explicitly configure them as digital via the CMCON and ANSEL registers if used as GPIO.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - for AEC-Q100 applications, evaluate the PIC16F88 or PIC18F family.
