PIC16LF877A-I/ML - 8-Bit 10MHz MCU, 14KB Flash, 44-QFN | Microchip
MPN: PIC16LF877A-I/ML ✓ فعالPIC16LF877A-I/ML نمای کلی
What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash/ROM), volatile working memory (RAM), and a range of peripheral interfaces (ADC, UART, timers, I/O) into one package. MCUs are the foundation of embedded systems and belong to the broader category of microprocessors and integrated circuits. The PIC16F family specifically uses Microchip's enhanced Harvard RISC architecture with a 14-bit instruction word optimized for deterministic real-time control.
Key features of the PIC16LF877A-I/ML include 33 digital I/O pins, a 10-bit multi-channel Analog-to-Digital Converter (ADC), two 8-bit timers and one 16-bit timer, two Capture/Compare/PWM modules (CCP), a synchronous serial port configurable for SPI or I²C, a USART with RS-485 support, and integrated brown-out reset (BOR) and watchdog timer (WDT) for safety-critical operation. The 44-QFN package provides a compact footprint with an exposed thermal pad for improved heat dissipation.
The PIC16LF877A uses Microchip's nanoWatt Technology for extended battery life, with multiple low-power sleep/idle modes, programmable oscillator options including internal 31kHz to 8MHz RC oscillator, and software-controlled peripheral shutdown. The Harvard architecture with separate program and data buses allows simultaneous instruction fetch and data access, and the 8-level hardware stack plus 35 single-word instructions simplify firmware development in assembly or C (MPLAB XC8).
Typical applications include industrial sensor monitoring, HVAC control, motor control feedback loops, low-power IoT edge nodes, automotive body electronics (with appropriate derating), consumer appliance control boards, and battery-powered instrumentation. The PIC16F877A's rich peripheral mix makes it especially suitable as a measurement and control front-end where deterministic timing and long product lifecycles are required.
When designing with this device, ensure your toolchain is configured for the LF (low-voltage) variant: MPLAB X IDE with XC8 compiler is the standard development flow, and programmers like PICkit 3/4 or ICD debug the device via the ICSP interface. Designers migrating from PIC16F877A to PIC16LF877A should confirm supply voltage stays within 2.0-5.5V and verify ADC reference voltage scaling at low VDD.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single decision-ready reference for sourcing and qualifying the PIC16LF877A-I/ML.
جایگزین‌های drop-in برای PIC16LF877A-I/ML — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC16LF877A-I/ML (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در ADC, Timers, I/O Pins, Operating Temperature, Operating Voltage Range.
PIC16LF877AT-I/ML
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC16LF877-04I/ML
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC16LF877-04/ML
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
PIC16LF876A-I/ML
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16LF874A-I/ML
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC16LF877A-I/ML حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | PIC16 8-bit RISC (enhanced Harvard, 14-bit instruction word) |
| Program Memory | 14 KB (8K x 14) Flash |
| RAM | 368 x 8 bytes |
| EEPROM | 256 x 8 bytes |
| Maximum Clock Speed | 10 MHz |
| Operating Voltage Range | 2 V to 5.5 V |
| I/O Pins | 33 |
| ADC | 10-bit, 8 channels |
| Timers | 2 x 8-bit, 1 x 16-bit |
| CCP Modules | 2 |
| Serial Interfaces | SPI / I2C / USART (RS-485) |
| بسته‌بندی | 44-pin QFN (8x8 mm) |
| نوع نصب | Surface Mount |
| دمای کاری | -40C to +85C (Industrial, -I suffix) |
| وضعیت RoHS | Compliant |
پیکربندی پین PIC16LF877A-I/ML
| پین 1 | MCLR/THV — Master Clear (Reset) input / High-Voltage Programming |
| پین 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| پین 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| پین 4 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC VREF- |
| پین 5 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC VREF+ |
| پین 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| پین 7 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI Slave Select |
| پین 8 | RE0/RD/AN5 — Port E bit 0 / Read control / Analog input 5 |
| پین 9 | RE1/WR/AN6 — Port E bit 1 / Write control / Analog input 6 |
| پین 10 | RE2/CS/AN7 — Port E bit 2 / Chip Select / Analog input 7 |
| پین 11 | VDD — Positive supply voltage |
| پین 12 | VSS — Ground |
| پین 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| پین 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| پین 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock |
| پین 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 |
| پین 17 | RC2/CCP1 — Port C bit 2 / CCP1 |
| پین 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| پین 19 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port bit 0 |
| پین 20 | RD1/PSP1 — Port D bit 1 / Parallel Slave Port bit 1 |
| پین 21 | RD2/PSP2 — Port D bit 2 / Parallel Slave Port bit 2 |
| پین 22 | RD3/PSP3 — Port D bit 3 / Parallel Slave Port bit 3 |
| پین 23 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| پین 24 | RC5/SDO — Port C bit 5 / SPI data out |
| پین 25 | RC6/TX/CK — Port C bit 6 / USART TX / USART clock |
| پین 26 | RC7/RX/DT — Port C bit 7 / USART RX / USART data |
| پین 27 | RD4/PSP4 — Port D bit 4 / Parallel Slave Port bit 4 |
| پین 28 | RD5/PSP5 — Port D bit 5 / Parallel Slave Port bit 5 |
| پین 29 | RD6/PSP6 — Port D bit 6 / Parallel Slave Port bit 6 |
| پین 30 | RD7/PSP7 — Port D bit 7 / Parallel Slave Port bit 7 |
| پین 31 | VSS — Ground |
| پین 32 | VDD — Positive supply voltage |
| پین 33 | RB0/INT — Port B bit 0 / External interrupt |
| پین 34 | RB1 — Port B bit 1 |
| پین 35 | RB2 — Port B bit 2 |
| پین 36 | RB3/PGM — Port B bit 3 / Low-voltage programming |
| پین 37 | RB4 — Port B bit 4 (interrupt-on-change) |
| پین 38 | RB5 — Port B bit 5 (interrupt-on-change) |
| پین 39 | RB6/PGC — Port B bit 6 / ICSP clock |
| پین 40 | RB7/PGD — Port B bit 7 / ICSP data |
| پین 41 | NC — Not connected (per datasheet) |
| پین 42 | NC — Not connected (per datasheet) |
| پین 43 | NC — Not connected (per datasheet) |
| پین 44 | ePAD — Exposed thermal pad - connect to VSS |
کاربردهای معمول
PIC16LF877A-I/ML مناسب است برای 6 کاربردs: Industrial Sensor Monitoring, HVAC Climate Control, Low-Power IoT Edge Node, Small Appliance Control, Battery-Powered Instrumentation, Educational / Development Platform.
Industrial Sensor Monitoring
The PIC16LF877A-I/ML's 8-channel 10-bit ADC and 33 I/O pins make it ideal for multi-sensor industrial monitoring stations. According to the Microchip datasheet, the on-chip ADC supports 8 single-ended or 4 differential inputs with 50 ksps conversion rate at 5V, sufficient for temperature, pressure, and 4-20mA current loop sensing. The wide 2.0-5.5V operating range lets the MCU directly digitize 3.3V sensor outputs without level shifters. Its hardware USART (RS-485 capable) interfaces to industrial field buses for centralized data acquisition, and the integrated watchdog timer plus brown-out reset ensure reliable operation in electrically noisy factory environments. The 44-QFN package fits inside sealed sensor housings.
پیشنهادی
HVAC Climate Control
The PIC16LF877A-I/ML is well-suited to HVAC controller boards thanks to its dual CCP modules for PWM-driven fan/blower control and 16-bit timer for accurate scheduling. According to the Microchip datasheet, the Capture/Compare/PWM module delivers 10-bit resolution at up to 39 kHz, which is appropriate for triac-phase-control of AC loads and DC motor speed regulation. The 33 I/O drive multi-relay outputs for compressor, reversing valve, and damper control, while the 8-channel ADC reads thermistor temperatures, humidity sensors, and pressure switches. nanoWatt Technology sleep modes cut idle power when the HVAC system is in standby, an important factor for energy-star compliance in modern thermostats.
پیشنهادی
Low-Power IoT Edge Node
Battery-powered IoT edge nodes benefit from the PIC16LF877A-I/ML's nanoWatt Technology and 2.0-5.5V supply range. According to the Microchip datasheet, sleep current drops below 1 uA with the Watchdog Timer enabled, allowing multi-year operation on two AA cells. The integrated USART interfaces to radio modules like LoRa or sub-GHz transceivers for low-duty-cycle telemetry, and the 256-byte EEPROM stores non-volatile configuration (network IDs, calibration). The 10-bit ADC reads battery voltage, sensor data, and current-sense amplifiers without external components. The 44-QFN package's small footprint (8x8 mm) plus exposed thermal pad suits compact IoT device form factors.
پیشنهادی
Small Appliance Control
Coffee makers, washing machines, microwave ovens, and other small appliances use the PIC16LF877A-I/ML as a low-cost control MCU. According to the Microchip datasheet, the 14 KB Flash stores the user-interface state machine and menu logic, while the 368-byte RAM handles runtime data. The Capture/Compare/PWM modules drive triac phase controls for heater elements, and the 10-bit ADC reads NTC thermistors for over-temperature protection. The 33 I/O pins drive 7-segment displays, keypads, and buzzer outputs without external latches. The wide 2-5.5V operating range accommodates both 3.3V and 5V power supply designs common in cost-sensitive consumer appliances.
پیشنهادی
Battery-Powered Instrumentation
Handheld multimeters, portable data loggers, and field measurement instruments are ideal hosts for the PIC16LF877A-I/ML because of its nanoWatt Technology and wide operating voltage. According to the Microchip datasheet, the LF variant draws microamps in sleep mode, supporting months of battery life between charges. The 10-bit ADC and 8-channel input handle a variety of sensor types - voltage, current, resistance via a simple resistor divider. The hardware USART enables USB bridge connections through an external UART-to-USB chip for data offload. The 256-byte EEPROM stores user calibration coefficients, and the 14 KB Flash holds measurement firmware and display logic for character or graphical LCDs.
پیشنهادی
Educational / Development Platform
Universities, technical schools, and hobbyists favor the PIC16LF877A-I/ML as a teaching platform for embedded systems because of Microchip's free MPLAB X IDE and XC8 compiler. According to the Microchip datasheet, the rich peripheral mix (ADC, USART, SPI, I2C, CCP, timers) lets students exercise almost every common MCU subsystem with a single chip. The 44-QFN package is breadboard-friendly with carrier boards, and PICkit programmers/debug students can use ICSP for in-circuit debug. The LF variant runs from 3.3V which protects USB-powered lab setups. Sample code and reference designs in C and assembly are widely available, lowering the entry barrier for first-time embedded developers.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC16LF877A-I/ML — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC16LF877AT-I/ML | PIC16LF877-04I/ML | PIC16LF877-04/ML | PIC16LF874A-I/ML |
|---|---|---|---|---|---|
| Package | 44-QFN (8x8) | 44-QFN (8x8) - same | 44-QFN (8x8) - same | 44-QFN (8x8) - same | 44-QFN (8x8) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 14 KB | 14 KB | 14 KB | 14 KB | 7 KB (-50%) |
| Max Clock Frequency | 10 MHz | 10 MHz | 4 MHz (-60%) | 4 MHz (-60%) | 10 MHz |
| Operating Voltage Range | 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 |
| I/O Pins | 33 | 33 | 33 | 33 | 28 (-15%) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | 0C to +70C (Commercial) | -40C to +85C |
| nanoWatt Technology | Yes | Yes | No (older silicon) | No (older silicon) | Yes |
تفاوت‌های کلیدی
- Low-voltage operation down to 2.0V with nanoWatt Technology (در مقابلPIC16F877A-I/ML (standard F variant))
- Tape-and-reel production-ready variant (در مقابلPIC16LF877AT-I/ML)
- Higher Flash and I/O count than 40-pin sibling (در مقابلPIC16LF874A-I/ML)
یادداشت‌های طراحی
Estimated: at 10 MHz, VDD=5V, the PIC16LF877A draws approximately 10 mA active current. Add a 100 nF ceramic decoupling capacitor as close as possible to each VDD/VSS pair (pins 11/12 and 31/32). For battery-powered designs, leverage nanoWatt Technology sleep modes - the datasheet specifies sleep current below 1 uA with WDT disabled, allowing multi-year operation on two AA cells. Place a 10 uF bulk capacitor near the IC for transient load handling when peripherals wake.
The 44-QFN package has an exposed thermal pad (e-pin 44) that must be soldered to a copper pour on the PCB for proper thermal dissipation. According to the Microchip datasheet, theta_JA of the QFN package is approximately 28 C/W with adequate thermal pad soldering, dropping to 22 C/W with multi-layer PCB thermal vias. For industrial temperature designs operating at high ambient (>60C), a minimum 1 square inch copper pour connected to the e-pad is recommended. Decoupling capacitor (NTC) locations are not critical for thermal performance.
Route the ICSP signals (MCLR/VPP, PGC/RC6, PGD/PDC) to a 0.1" header for PICkit programming. Keep ICSP traces short (<100 mm) and avoid running them near high-current switching lines. Place the 20 MHz (or 10 MHz LF) crystal within 5 mm of OSC1/OSC2 (pins 13/14) with short traces and a ground guard ring for EMI suppression. The MCLR reset line benefits from a 10 kohm pull-up to VDD plus a 100 nF cap to ground for switch debouncing and ESD protection.
Do not confuse the PIC16LF877A (low-voltage, 10 MHz, nanoWatt) with the PIC16F877A (5V-only, 20 MHz) when ordering - the LF variant has a different datasheet document. The '-04' speed grade (4 MHz) parts are pre-A silicon revisions without nanoWatt Technology; do not substitute them in battery-powered designs. The 44-QFN e-pad MUST be soldered for thermal and electrical performance; an unsoldered e-pad causes erratic behavior and may damage the device. The LF variant tops out at 10 MHz - do not program configuration bits expecting 20 MHz operation.
اطلاعات انطباق
RoHS compliant per Microchip product page; the -ML suffix designates lead-free QFN packaging. Not AEC-Q100 qualified - for automotive designs, Microchip recommends PIC18F or dsPIC33 families with AEC-Q100 variants. The LF variant is not military-grade qualified.
