PIC16LF819-I/SS - 8-bit MCU, 3.5KB Flash, 20-SSOP | Microchip
MPN: PIC16LF819-I/SS ✓ פעילPIC16LF819-I/SS סקירה
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program and data memory, and programmable peripherals on a single die. Within that hierarchy, PIC16F-series parts belong to the 8-bit RISC PIC family -> 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor. The PIC16LF819 specifically targets battery-friendly and energy-harvesting designs where 5 V PIC16F819 compatibility is unnecessary.
Key differentiating features include an internal 8 MHz oscillator with PLL-derived 20 MHz operation, a 10-bit ADC with up to 5 channels, two analog comparators, a Capture/Compare/PWM (CCP) module, and nanoWatt sleep modes drawing typically under 1 uA. The PIC16LF819-I/SS also integrates a synchronous serial port (SSP) supporting SPI and I2C, plus a USART for asynchronous serial communication. These peripherals give embedded designers a single-chip solution for sensor reading, motor or actuator control, and wired communications without external ICs.
Technically, the device uses a Harvard architecture with a 14-bit instruction word and 8-bit data path, prioritizing deterministic interrupt latency and code density over raw throughput. The SSOP-20 (also called 20-SSOP) industrial footprint is 5.30 mm wide with a 0.65 mm lead pitch, enabling compact PCB placement and standard reflow soldering compatible with existing PIC16F819 designs (the LF variant is pin-to-pin compatible). The part is in-system programmable via ICSP, eliminating the need for a socketed programmer during development.
Typical applications include battery-powered sensor nodes, portable medical monitors, low-power IoT edge devices, remote controls, consumer appliance controllers, and handheld instrumentation. The 2 V minimum supply enables direct connection to two alkaline or NiMH cells without boost conversion.
When designing with this MCU, place a 100 nF decoupling capacitor within 5 mm of VDD and ensure the MCLR pin is pulled high through a 10 kohm resistor for normal operation. Pin RA4 is an open-drain output and requires an external pull-up if used as a digital I/O.
This page synthesizes distributor pricing, drop-in same-package alternatives, and engineering design notes that go beyond the manufacturer datasheet, helping procurement and embedded engineers make a faster, more confident selection.
חלופות תחליף ישיר עבור PIC16LF819-I/SS — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC16LF819-I/SS (אותו גורם צורה וטביעת רגל) — שונים ב Package, Timers, Core Architecture, ADC, Internal Oscillator.
PIC16F819-I/SS
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16LF818-I/SSTSL
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16LF818T-I/SS
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16F818-I/SS
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16LF819-I/SOTSL
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16LF819-I/SS דירוגים מרביים ומאפיינים חשמליים
| Core | PIC16 8-bit RISC |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| RAM | 256 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 20 MHz (200 ns instruction cycle) |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 16 |
| ADC | 10-bit, 5 channels |
| Analog Comparators | 2 |
| CCP Modules | 1 |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Communication | USART, SSP (SPI/I2C) |
| Internal Oscillator | 8 MHz (31 kHz to 8 MHz selectable) |
| מארז | 20-pin SSOP (5.30 mm body) |
| טמפרטורת פעולה | -40C to +85C (Industrial) |
| סוג הרכבה | Surface Mount |
| רמת MSL | 1 |
| סטטוס RoHS | Compliant |
| Lead-Free | Yes |
| Programming Method | ICSP (In-Circuit Serial Programming) |
תצורת פינים של PIC16LF819-I/SS
| פין 1 | RA0/AN0 — PORTA bit 0 / ADC input channel 0 |
| פין 2 | RA1/AN1 — PORTA bit 1 / ADC input channel 1 |
| פין 3 | RA2/AN2/CVREF — PORTA bit 2 / ADC input channel 2 / comparator reference output |
| פין 4 | RA3/AN3/VREF+ — PORTA bit 3 / ADC input channel 3 / ADC positive reference |
| פין 5 | RA4/AN4/T0CKI — PORTA bit 4 (open-drain) / ADC input channel 4 / Timer0 clock input |
| פין 6 | RA5/AN5/SS/HLVDIN — PORTA bit 5 / ADC input channel 5 / SPI slave select / high/low voltage detect input |
| פין 7 | RA6/OSC2/CLKO — PORTA bit 6 / oscillator output / clock output |
| פין 8 | RA7/OSC1/CLKI — PORTA bit 7 / oscillator input / clock input |
| פין 9 | VSS — Ground reference |
| פין 10 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| פין 11 | RB0/INT — PORTB bit 0 / external interrupt input |
| פין 12 | RB1 — PORTB bit 1 |
| פין 13 | RB2 — PORTB bit 2 |
| פין 14 | RB3/PGM — PORTB bit 3 / ICSP low-voltage programming input |
| פין 15 | RB4 — PORTB bit 4 |
| פין 16 | RB5/PGM — PORTB bit 5 / ICSP programming input |
| פין 17 | RB6/PGC — PORTB bit 6 / ICSP clock input |
| פין 18 | RB7/PGD — PORTB bit 7 / ICSP data input/output |
| פין 19 | MCLR/VPP — Master clear reset input (active low) / ICSP programming voltage input |
| פין 20 | VSS — Ground reference |
יישומים טיפוסיים
PIC16LF819-I/SS מתאים עבור 6 יישוםs: Battery-Powered Sensor Nodes, Portable Medical Monitors, Remote Controls and IR Transmitters, Consumer Appliance Control Boards, Industrial Sensor Interface Modules, Handheld Test and Measurement.
Battery-Powered Sensor Nodes
The PIC16LF819-I/SS fits battery-powered sensor nodes because its 2.0 V minimum supply enables direct operation from two alkaline or NiMH cells without boost conversion, and nanoWatt sleep modes draw under 1 uA typical. Its 10-bit 5-channel ADC reads temperature, light, or voltage sensors with 1 LSB resolution, while the 20-pin SSOP footprint leaves enough I/O for SPI sensor interfacing. Compared with switching converters, the LF variant adds zero switching noise to analog sensor rails, preserving ADC accuracy at low signal levels.
מומלץ
Portable Medical Monitors
The PIC16LF819-I/SS suits portable medical monitors through its deterministic 8-bit RISC core, 200 ns interrupt latency, and 2 V low-voltage operation that extends battery life in handheld pulse oximeters or glucose meters. The integrated USART connects to Bluetooth or NFC modules for wireless data transfer, while the 10-bit ADC captures sensor signals with adequate precision for trend monitoring. Operating temperature of -40C to +85C meets handheld medical device environmental requirements.
מומלץ
Remote Controls and IR Transmitters
The PIC16LF819-I/SS fits remote controls and IR transmitters because its 2 V operation runs from a single CR2032 coin cell, and the CCP module produces precise PWM carrier frequencies for IR modulation (typically 36 to 40 kHz). Under 1 uA sleep current extends battery life past 5 years in typical use. The USART and SSP provide flexibility for RF modules in higher-end universal remotes.
מומלץ
Consumer Appliance Control Boards
The PIC16LF819-I/SS controls appliance front panels in coffee machines, washing machines, and microwave ovens where its 16 I/O pins drive LED indicators, keypad scanning, and triac firing signals. The internal 8 MHz oscillator eliminates external resonator cost, and the 20 MHz internal PLL with 4x multiplier delivers sufficient MIPS for user-interface response. Wide 2 V to 5.5 V supply tolerates rectified mains-derived rails with minimal regulation.
מומלץ
Industrial Sensor Interface Modules
The PIC16LF819-I/SS serves industrial sensor interface modules because its industrial -40C to +85C range handles factory floor conditions, and its 10-bit ADC plus two analog comparators provide both digitisation and threshold detection for 4-20 mA loops. The integrated USART speaks RS-232 or RS-485 protocols via external transceiver ICs for factory-bus connectivity. ICSP allows field firmware updates without removing the module.
מומלץ
Handheld Test and Measurement
The PIC16LF819-I/SS fits handheld multimeters and signal injection tools where its 2 V operation allows single-cell lithium power and the 10-bit ADC reads measurement signals with adequate resolution for entry-level instruments. The USART streams data to PC tools for logging, and the small SSOP-20 footprint leaves PCB area for displays and connectors. Under 1 uA sleep mode lets the device shut down between measurements, extending field battery life.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC16LF819-I/SS — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC16F819-I/SS | PIC16LF818-I/SS | PIC16LF818T-I/SS | PIC16F818-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP (5.30 mm) | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same |
| Program Memory | 3.5 KB Flash | 3.5 KB Flash | 1 KB Flash | 1 KB Flash | 1 KB Flash |
| RAM | 256 bytes | 256 bytes | 128 bytes | 128 bytes | 128 bytes |
| Operating Voltage (VDD) | 2.0 V to 5.5 V | 4.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.0 V to 5.5 V |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ADC | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels |
| EEPROM | 256 bytes | 256 bytes | 128 bytes | 128 bytes | 128 bytes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
מבדילים עיקריים
- Lowest minimum supply voltage in the PIC16F819 family (לעומתPIC16F819-I/SS)
- Largest flash memory among pin-compatible siblings (לעומתPIC16LF818-I/SS)
- Five ADC channels versus three on smaller PIC16F8x variants (לעומתPIC16F88-I/SS)
הערות תכנון
Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 10) and a bulk 10 uF capacitor near the supply input. For battery-powered designs, the PIC16LF819-I/SS nanoWatt sleep modes draw typically under 1 uA, but disabling the ADC and USART before entering sleep further reduces current. Estimated: quiescent current with ADC disabled is 0.1 uA typical at 2 V.
The 20-pin SSOP package uses a 0.65 mm lead pitch and 5.30 mm body width. Keep all signal traces at least 0.2 mm away from the exposed lead edges to avoid solder bridges during reflow. For noise immunity on analog inputs, route ADC traces away from PWM or clock signals and use a ground guard ring around sensitive analog pins such as RA3/AN3.
Pin RA4 is an open-drain output and cannot drive high without an external pull-up resistor (typically 4.7 kohm). Forgetting this is the most common reason RA4-based designs fail. Additionally, the MCLR pin must be tied to VDD through a 10 kohm resistor; leaving it floating causes intermittent resets in electrically noisy environments. ICSP programming requires RB6/PGC and RB7/PGD to remain accessible and not be loaded heavily during programming.
The internal 8 MHz oscillator can drift up to 2 percent over temperature, which is acceptable for USART baud rates up to 38.4 kbaud but marginal above. For higher baud rates or asynchronous serial communication requiring tight timing, configure the USART in high-speed mode (BRGH=1) and consider an external 20 MHz crystal on pins RA6/OSC2 and RA7/OSC1. Estimated: internal oscillator drift of 1 percent at 25 C is typical per Microchip datasheet.
מידע על תאימות
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; use automotive-grade PIC16 family variants for vehicle applications. Halogen-free per Microchip environmental certification.
