PIC16LF876AT-I/SO - 8-bit 10MHz 14KB Flash MCU 28-SOIC | Microchip
MPN: PIC16LF876AT-I/SO ✓ Hoạt độngPIC16LF876AT-I/SO Tóm tắt
A PIC microcontroller (MCU) is a self-contained single-chip computer built around a CPU, program memory, data memory, and on-chip peripherals. The PIC16 family uses Microchip's enhanced mid-range 14-bit instruction set, which provides only 35 single-word instructions yet delivers 200 ns instruction execution time at 20 MHz. Within the broader taxonomy, the PIC16F876A belongs to the 8-bit microcontroller class -> RISC microcontroller -> embedded microcontroller -> integrated circuit. The "LF" prefix indicates a wide-voltage part supporting 2.0V to 5.5V operation, while the "A" suffix marks the silicon revision that adds self-programmability, an ICD debug port, two analog comparators, two Capture/Compare/PWM modules, and a USART/SCI port configurable as 3-wire SPI or I2C.
Key features include five 10-bit ADC channels, two comparators, two CCP modules, one USART, one MSSP (SPI/I2C), 256 bytes of EEPROM, an in-circuit debugger (ICD), Flash self-programming, and wide operating voltage from 2.0V to 5.5V. The instruction set is upward compatible with all PIC16 mid-range parts, so code migrates cleanly to PIC16F873A/874A/877A variants with more memory. The "T" suffix indicates tape-and-reel packaging for high-volume assembly.
Technically, the PIC16LF876A combines Harvard architecture (separate program and data buses) with a powerful 14-bit instruction word that improves code density over 8-bit CISC cores. The 368-byte RAM supports a hardware stack 8 levels deep, and the Flash program memory is rated for 100K erase/write cycles. The peripheral set targets embedded sensing and control: five ADC channels cover most analog sensor interfaces, while the MSSP and USART handle asynchronous serial, SPI, and I2C communication with on-chip EEPROM for parameter storage.
Typical applications include industrial sensor interface boards, battery-powered handheld instruments, automotive body controllers, low-cost HVAC thermostats, and consumer appliance controllers. The wide 2.0V-5.5V range also makes the LF version attractive for 2-cell battery or 3.3V regulated rails. Use the "A" revision whenever self-programming or in-circuit debug is required; use the original PIC16F876 only when migrating legacy firmware that does not need self-programming.
When designing with the PIC16LF876A, ensure MCLR is tied to VDD through a 10kΩ resistor, decoupling caps are placed within 1 cm of VDD/VSS, and the ICSP/ICD pins are reserved for programming header access. The 28-SOIC wide-body package (0.295 inch, 7.50 mm) eases hand-soldering and rework compared to SSOP/QFN packages. This page synthesizes drop-in alternatives, lifecycle signals, and design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF876AT-I/SO — 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 PIC16LF876AT-I/SO (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core Architecture, Instruction Execution Time, Communication Peripherals.
PIC16LF876A-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F876A-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F873AT-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F876-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF873AT-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F872-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF876AT-I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16 mid-range 8-bit RISC (14-bit instruction word) |
| Program Memory Type | Flash |
| Program Memory Size | 14 KB (8K x 14 words) |
| RAM | 368 bytes |
| EEPROM Data Memory | 256 bytes |
| Maximum CPU Frequency | 10 MHz |
| Instruction Execution Time | 200 ns at 20 MHz (10 MIPS at 10 MHz input) |
| Supply Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 22 |
| ADC | 10-bit, 5 channels |
| Comparators | 2 |
| CCP Modules | 2 |
| Serial Interfaces | USART/SCI, MSSP (SPI / I2C) |
| In-Circuit Debug | Yes (ICD) |
| Self-Programming | Yes (Flash) |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial "I") |
| Hộp | 28-SOIC (SO) wide-body, 7.50 mm (0.295 in) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16LF876AT-I/SO
| Chân 1 | MCLR/VPP/RA3 — Master Clear (reset) / programming voltage / PORTA bit 3 |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (open-drain) |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Chân 8 | OSC2/CLKOUT — Oscillator output / clock out |
| Chân 9 | OSC1/CLKIN — Oscillator input / external clock in |
| Chân 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| Chân 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 12 | RC2/CCP1 — PORTC bit 2 / CCP1 (PWM/capture/compare) |
| Chân 13 | RC3/SCK/SCL — PORTC bit 3 / MSSP SPI clock / I2C clock |
| Chân 14 | RC4/SDI/SDA — PORTC bit 4 / MSSP SPI data in / I2C data |
| Chân 15 | RC5/SDO — PORTC bit 5 / MSSP SPI data out |
| Chân 16 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Chân 17 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Chân 18 | VSS — Ground |
| Chân 19 | VDD — Positive supply (2.0V to 5.5V) |
| Chân 20 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 21 | RB1 — PORTB bit 1 |
| Chân 22 | RB2 — PORTB bit 2 |
| Chân 23 | RB3/PGM — PORTB bit 3 / low-voltage programming |
| Chân 24 | RB4 — PORTB bit 4 |
| Chân 25 | RB5 — PORTB bit 5 |
| Chân 26 | RB6/PGC — PORTB bit 6 / ICD clock |
| Chân 27 | RB7/PGD — PORTB bit 7 / ICD data |
| Chân 28 | VSS — Ground (alternate pin) |
Ứng dụng tiêu biểu
PIC16LF876AT-I/SO phù hợp cho 6 Áp dụngs: Industrial Sensor Interface Board, Battery-Powered Handheld Instrument, HVAC Thermostat Controller, Automotive Body Control Module, Consumer Appliance Controller, Data Acquisition Front End.
Industrial Sensor Interface Board
PIC16LF876AT-I/SO suits industrial sensor hubs because its 5-channel 10-bit ADC handles up to five analog sensors simultaneously while the wide-voltage 2.0V-5.5V range accommodates 24V-bus-derived rails after a small LDO. The 22 digital I/O pins drive status LEDs, relay coils, and keypad matrices; the MSSP port provides I2C bus connectivity to digital temperature sensors and EEPROMs.
Được đề xuất
Battery-Powered Handheld Instrument
PIC16LF876AT-I/SO targets battery-powered instruments because its LF wide-voltage design operates directly from two alkaline cells (2.0V-3.2V) without a boost converter. The 256-byte EEPROM stores calibration constants across battery swaps; Flash self-programming supports field firmware updates via a 3-wire ICD interface. Sleep current in the low-microamp range (per PIC16F876A datasheet) extends handheld runtime.
Được đề xuất
HVAC Thermostat Controller
PIC16LF876AT-I/SO drives low-cost HVAC thermostats because the two CCP modules generate PWM outputs for triểm-fired heater control, while the 5-channel ADC reads thermistor temperature, humidity sensor, setpoint potentiometer, and supply voltage. The USART connects to a Wi-Fi or Modbus module for smart-thermostat networking, and the 256-byte EEPROM stores setpoint schedules through power cycles.
Được đề xuất
Automotive Body Control Module
PIC16LF876AT-I/SO fits automotive body controllers (non-safety) such as mirror adjusters, lighting drivers, and accessory multiplexers because the LF wide-voltage range handles 12V automotive rails (8V-16V transients) after a 5V regulator, and the 22 I/O pins drive multiple relays via MOSFET pre-drivers. The MSSP and USART provide LIN/CAN-ready serial connectivity for body-electronics networks.
Được đề xuất
Consumer Appliance Controller
PIC16LF876AT-I/SO drives consumer appliance controllers such as microwave keypads, washing-machine displays, and coffee machines because the 5-channel ADC reads analog sensors (water level, weight, temperature), the two CCP modules generate PWM for motor speed or heater triac phase-control, and the USART interfaces with a 7-segment display driver. The 14 KB Flash fits full-appliance control firmware with diagnostics.
Được đề xuất
Data Acquisition Front End
PIC16LF876AT-I/SO provides a compact 5-channel 10-bit data acquisition front end because the 22 I/O pins route multiplexer control signals while the MSSP port streams converted samples to a host via SPI at 10 MHz. The 256-byte EEPROM stores calibration coefficients, and Flash self-programming supports remote firmware updates for field-deployed sensor pods.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF876AT-I/SO — 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 | PIC16LF876A-I/SO | PIC16F876A-I/SO | PIC16F873AT-I/SO | PIC16F876-04I/SO | PIC16LF873AT-I/SO | PIC16F872-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC (SO) | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 14 KB | 14 KB | 14 KB | 7 KB | 14 KB | 7 KB | 7 KB |
| RAM | 368 bytes | 368 bytes | 368 bytes | 192 bytes | 368 bytes | 192 bytes | 128 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | none | 256 bytes | none | none |
| Maximum Clock | 10 MHz (20 MHz on F-version) | 10 MHz | 20 MHz | 20 MHz | 4 MHz | 10 MHz | 20 MHz |
| Supply Voltage Range | 2.0V to 5.5V | 2.0V to 5.5V | 4.0V to 5.5V | 4.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
| ADC Channels / Resolution | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 8-bit |
| Self-Programming | Yes | Yes | Yes | Yes | No | Yes | Yes |
Bảo phân biệt quan trọng
- Wide-voltage 2.0V-5.5V operation versus standard 4.0V-5.5V on PIC16F876A-I/SO (vsPIC16F876A-I/SO)
- On-chip 256-byte EEPROM versus none on PIC16F873AT-I/SO (vsPIC16F873AT-I/SO)
- Modern silicon revision with self-programming versus no self-programming on PIC16F876-04I/SO (vsPIC16F876-04I/SO)
Ghi chú thiết kế
PIC16LF876AT-I/SO operates from 2.0V to 5.5V, but the brown-out reset (BOR) and ADC accuracy degrade at the low end. Place a 100 nF decoupling cap within 5 mm of VDD pin 20 and VSS pin 19, plus a 10 uF bulk cap on the rail. For 3.3V-only systems, an MCP1700 LDO avoids boost-converter losses.
Route the ICSP/ICD pins (RB6/PGC = pin 26, RB7/PGD = pin 27, MCLR/VPP = pin 1) to a programming header without series resistors greater than 4.7 kohm. Keep the 28-SOIC wide-body package exposed thermal pad area on the bottom layer free of vias under the part - the SO package has no thermal pad, so simple single-side copper pour is sufficient.
MCLR (pin 1) must never float - tie to VDD through a 10 kohm resistor, with the ICSP VPP path using a diode or direct connection to the programmer. Do not exceed 13.5V on MCLR/VPP; use the Microchip ICD tool's regulated VPP. Crystal-mode oscillator configuration on pins 9/10 requires HS mode in CONFIG for >4 MHz crystals; default XT works only up to 4 MHz.
When using the 5-channel 10-bit ADC, set all unused ANx pins to digital I/O and tie them to defined logic levels to avoid floating-input ADC noise. Acquire samples with at least 1.2 uS acquisition time at 10 MHz and use the internal RC ADC clock derived from Fosc/16 or Fosc/32 for stable conversions.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose automotive-grade PIC16F876A-I/SOVAO or PIC18F equivalents for AEC-Q100 automotive designs.
