PIC16F871-E/L - 8-Bit 20MHz 3.5KB Flash MCU, 44-PLCC | Microchip
MPN: PIC16F871-E/L ✓ Hoạt độngPIC16F871-E/L Tóm tắt
A mid-range PIC16 microcontroller is a class of 8-bit RISC MCU from Microchip using a 14-bit instruction word and 35 single-word instructions, designed for embedded control applications. The PIC16F871 belongs to the broader PIC16 family, which sits inside Microchip's PIC architecture taxonomy: PIC10/12/16 (8-bit) -> PIC -> Microcontroller -> Embedded IC -> Semiconductor. Mid-range PICs typically include nanoWatt Technology for power-managed sleep states, on-chip debug (ICD), and self-programming capability — and the PIC16F871 exemplifies all three.
Key features include the on-chip ICD for in-circuit debug without an expensive emulator, self-programming Flash allowing firmware field updates, nanoWatt power management with multiple low-power modes, and 33 digital I/O lines. The 8-channel 10-bit ADC can serve up to 8 analog sensors in a single MCU, while the USART/SCI supports RS-232/RS-485 communication for industrial networking. The 44-PLCC package provides a J-lead socket-mountable footprint for prototyping and field replacement.
The PIC16F871 architecture combines a Harvard bus with separate program and data paths, achieving deterministic 200 ns instruction execution and predictable interrupt latency. Peripherals are mapped into a linear data-memory space and share a vectored interrupt controller, simplifying firmware development for mixed-signal and motor-control designs.
Typical applications include industrial sensor interfaces, building-automation controllers, low-end motor control, automotive body electronics, security and alarm panels, HVAC fan/blower control, and battery chargers. Its 5V-tolerant design and extended temperature range make it well suited to both 24V industrial buses (post-regulation) and 12V automotive environments.
Designers should note the -E suffix denotes the Extended (industrial) temperature grade -40C to +125C, distinguishing it from the -I (Industrial, -40C to +85C) variants. For new designs, PIC16F1 mid-range enhanced successors such as PIC16F18877 may offer modern peripherals; however, the PIC16F871 remains a long-lifecycle part with mature toolchain support.
Bộ thay thế dễ dàng lắp đặt cho PIC16F871-E/L — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16F871-E/L (cùng hình factor và footprint) — khác nhau ở Timers, Package, Core Architecture, Operating Temperature, Program Memory Size.
PIC16F871-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F871T-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F871-E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F871-E/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F871-E/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F871-E/L Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16 (8-bit RISC, 14-bit instruction word) |
| Instruction Set Size | 35 single-word instructions |
| Maximum CPU Frequency | 20 MHz |
| Instruction Execution Time | 200 ns (at 20 MHz) |
| Flash Program Memory | 3.5 KB (2K x 14) |
| RAM Data Memory | 128 bytes |
| EEPROM Data Memory | 64 bytes |
| ADC | 10-bit, 8 channels |
| I/O Pins | 33 (maximum) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Capture/Compare/PWM | Yes (CCP module) |
| Communication | USART/SCI |
| Self-Programming | Yes (Flash boot block) |
| In-Circuit Debug | Yes (ICD) |
| Power-Saving Technology | nanoWatt Technology |
| Điện áp cung cấp | 4 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C (Extended grade) |
| Hộp | 44-pin PLCC (J-Lead, 16.59 x 16.59 mm) |
| Kiểu lắp đặt | Surface Mount (Socketable PLCC) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F871-E/L
| Chân 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / VREF+ |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / Slave Select |
| Chân 8 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input 5 |
| Chân 9 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input 6 |
| Chân 10 | RE2/CS/AN7 — PORTE bit 2 / Chip Select / Analog input 7 |
| Chân 11 | VDD — Positive supply voltage (+5V) |
| Chân 12 | VSS — Ground reference |
| Chân 13 | OSC1/CLKIN — Oscillator input / External clock input |
| Chân 14 | OSC2/CLKOUT — Oscillator output / Clock output |
| Chân 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Chân 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Chân 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Chân 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Chân 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Chân 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Chân 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Chân 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Chân 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Chân 31 | VSS — Ground reference |
| Chân 32 | VDD — Positive supply voltage (+5V) |
| Chân 33 | RB0/INT — PORTB bit 0 / External interrupt |
| Chân 34 | RB1 — PORTB bit 1 |
| Chân 35 | RB2 — PORTB bit 2 |
| Chân 36 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| Chân 37 | RB4 — PORTB bit 4 |
| Chân 38 | RB5 — PORTB bit 5 |
| Chân 39 | RB6/PGC — PORTB bit 6 / ICD clock / ICSP clock |
| Chân 40 | RB7/PGD — PORTB bit 7 / ICD data / ICSP data |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16F871-E/L phù hợp cho 6 Áp dụngs: Industrial Sensor Interface & Data Acquisition, Building Automation & HVAC Control, Automotive Body Electronics, Security & Alarm Panel Controller, Battery Charger & Power Management, Low-Volume Industrial Serial Bridge.
Industrial Sensor Interface & Data Acquisition
The PIC16F871-E/L is well suited for industrial sensor-interface and data-acquisition nodes thanks to its 8-channel 10-bit ADC, USART, and Extended -40 C to +125 C temperature grade. The 8 ADC channels allow direct connection of up to 8 analog sensors (temperature, pressure, flow, level) to a single MCU, while the 20 MHz core runs the conversion-completion loop with deterministic 200 ns instruction timing for stable sampling rates. The USART supports RS-232/RS-485 networking for distributed industrial nodes back to a PLC. With 64 bytes of EEPROM available for calibration constants and 128 bytes RAM for buffering, the PIC16F871-E/L fits typical 4-20 mA loop sensor conditioner designs.
Được đề xuất
Building Automation & HVAC Control
The PIC16F871-E/L serves as a cost-effective controller for building-automation and HVAC subsystems (fan speed, damper control, thermostat input, alarm I/O). Its nanoWatt Technology supports deep-sleep current below 1 uA, enabling battery-backed or energy-harvesting HVAC nodes that spend most of their life in sleep mode. The PWM module (CCP) drives TRIAC phase-angle control or DC fan motor speed via MOSFET gate signals, while the USART links to a central building-management system over RS-485. The 44-PLCC socketable package eases field service of installed units — a key requirement in commercial-building service contracts.
Được đề xuất
Automotive Body Electronics
The PIC16F871-E/L is a fit for non-safety automotive body-electronics modules such as interior lighting, mirror control, seat positioner, HVAC blower, and accessory multiplexers, given its -40 C to +125 C Extended operating range and 5 V supply tolerance on 12 V automotive rails (post-regulation). The USART supports LIN-bus slave implementations for body-control networks, while the ADC reads multiplexed sensor inputs (potentiometers, switches). The Flash self-programming supports field firmware updates via OBD-II or service-tool routines, and the ICD simplifies bring-up of automotive prototypes. Note: this part is not AEC-Q100 qualified — for safety-critical or AEC-Q100 applications, select a PIC16/18 automotive-grade variant.
Được đề xuất
Security & Alarm Panel Controller
Security and intrusion-alarm panels benefit from the PIC16F871-E/L's 33 I/O pins for zone-input scanning and siren/relay output driving, plus its 64-byte EEPROM for storing installer-configured zone maps. The 10-bit ADC supports analog-zone supervision (end-of-line resistor sensing, glass-break detector interfaces), and the USART links to a central monitoring station via dialer or IP gateway. Extended -40 C to +125 C operation suits unheated garages, basements, and outdoor panel installations. The ICD-enabled debug workflow accelerates firmware bring-up for new sensor protocols (Z-Wave, Zigbee bridges).
Được đề xuất
Battery Charger & Power Management
The PIC16F871-E/L operates as the control MCU in small to mid-size battery chargers for cordless tools, e-bikes, robotics, and uninterruptible power supplies. Its ADC measures battery voltage, charge current (via shunt), and temperature (via NTC), while the PWM (CCP module) drives a buck or flyback converter's control loop. The Flash self-programming allows chemistry-specific charging profiles (Li-ion, NiMH, lead-acid) to be field-updated. With 64-byte EEPROM available for storing learned battery parameters, and -40 C to +125 C operation covering outdoor/automotive charging environments, the part is well matched to commercial charging systems up to several amps.
Được đề xuất
Low-Volume Industrial Serial Bridge
The PIC16F871-E/L is widely used as a protocol-conversion serial bridge between legacy RS-232/RS-485 industrial equipment and modern USB or Ethernet hosts. The USART/SCI peripheral directly drives RS-232 level-shifters or RS-485 transceivers, while firmware implements Modbus RTU/ASCII master/slave, DF1, or custom protocols. With 3.5 KB Flash, the part can host multi-protocol stacks; 128 bytes RAM buffers short telegrams; 64 bytes EEPROM stores node address, baud rate, and parity configuration. The Extended temperature grade supports cabinet-free installations in factories, and the 44-PLCC socketed package allows field swap-out when protocols evolve.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F871-E/L — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16F871-I/L | PIC16F871T-I/L | PIC16F871-E/P | PIC16F871-E/PT | PIC16F871-E/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 40-PDIP - different | 44-TQFP - different | 28-SOIC - different |
| Core | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC | PIC16 8-bit RISC |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| EEPROM | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes |
| Operating Temperature | -40 to +125 C (Extended) | -40 to +85 C (Industrial) | -40 to +85 C (Industrial) | -40 to +125 C (Extended) | -40 to +125 C (Extended) | -40 to +125 C (Extended) |
| Pin Count | 44 | 44 | 44 | 40 | 44 | 28 |
Bảo phân biệt quan trọng
- Extended temperature grade (-40 to +125 C) in PLCC-44 socketable package (vsPIC16F871-I/L)
- On-chip ICD eliminates external emulator cost (vsLegacy PIC16C7X family (no Flash, no ICD))
- Self-programming Flash supports field firmware updates (vsOTP (one-time-programmable) PIC16C parts)
Ghi chú thiết kế
Estimated: At 20 MHz CPU clock and 5 V supply, the PIC16F871-E/L core current is approximately 11 mA typical. Adding ADC, USART, and I/O activity raises total to roughly 15 mA. Use a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pair (pin 11/12 and pin 32/31), and a bulk 10 uF tantalum or ceramic at the regulator output. For battery-powered designs, leverage nanoWatt Technology sleep modes (Sleep current < 1 uA typical per datasheet) by gating peripheral clocks with PCON/PIE1 registers before issuing the SLEEP instruction.
Estimated: Place the 44-PLCC socket such that pin 1 indicator (chamfered corner or dot) is clearly marked on the silkscreen. Maintain a clearance ring of at least 2 mm around the socket for probe access during ICT. Route the crystal/oscillator traces (OSC1/OSC2) with ground-guard vias on both sides, trace length under 10 mm, and series resistor on OSC2 if using a high-frequency crystal (20 MHz fundamental). For in-circuit debug, bring out RB6/PGC and RB7/PGD to a 2x5 or 1x6 header with a 10 kohm pull-up on MCLR/VPP.
Critical: (1) Never leave MCLR floating — always tie through a 10 kohm pull-up to VDD, or to the ICSP programmer's high-voltage VPP during programming. (2) When using the ADC, set the corresponding TRIS bit to input and select analog mode in the ADCON1 register — leaving digital output mode loaded onto an analog pin yields spurious ADC readings. (3) The CCP1 and CCP2 pins double as PORTC functions; ensure the firmware disables unused CCP modules to release the pins for GPIO. (4) nanoWatt Technology is enabled via PCON/PIE1 register writes; merely entering Sleep without proper clock-switching leaves peripherals active and current consumption high.
Thông tin tuân thủ
RoHS compliant per Microchip product page. NOT AEC-Q100 qualified - the -E temperature grade extends to +125 C but does not carry AEC-Q100 automotive certification. For AEC-Q100 designs, select a PIC16 or PIC18 automotive-grade variant. Halogen-free status not explicitly stated in provided web data - flagged as unknown.
