PIC16LF872-I/SP - 8-Bit 20MHz 3.5KB Flash MCU 28-SPDIP | Microchip
MPN: PIC16LF872-I/SP ✓ Hoạt độngPIC16LF872-I/SP Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals around an 8-bit data bus. The PIC16F family from Microchip is built on a RISC architecture that executes one instruction per cycle (200ns at 20MHz), making it efficient for deterministic embedded control. Within the broader hierarchy of semiconductor devices, 8-bit MCUs sit below 16-bit and 32-bit MCUs in computational power but excel in low power, low cost, and real-time interrupt response. The PIC16LF872 is the low-voltage (LF) variant optimized for battery-backed and portable designs.
Key features include self-programming support via ICSP (In-Circuit Serial Programming), five 10-bit ADC channels with 200ksps throughput, and Microchip's PIC microcontroller instruction set with only 35 single-word instructions - making it easy to program in assembly or C (via MPLAB X and XC8 compiler). The LF variant extends the supply range down to 2.0V (compared to 4.5V minimum for the standard F variant), enabling direct operation from two AA cells or lithium coin cells.
The architecture combines a Harvard-style program/data bus, a 14-bit instruction word, and dedicated peripheral modules. The 10-bit ADC is suitable for sensor reading (temperature, light, voltage) at moderate precision, while the USART supports RS-232/RS-485 asynchronous communication up to several hundred kbps. The integrated ICD allows in-system debugging without an external emulator, reducing development cost.
Typical applications include industrial sensor interfaces, low-power remote controls, battery-powered instrumentation, HVAC controllers, small appliance controls, and educational/development platforms. The wide 2.0V-5.5V range makes it ideal for systems powered by 2-3 AA cells, lithium primaries, or USB-derived 5V rails. Designers also use the PIC16LF872 in mixed-signal front-ends that need a small amount of intelligence for ADC sequencing and data reporting.
When designing with the PIC16LF872-I/SP, ensure decoupling with a 100nF ceramic capacitor close to VDD, configure MCLR with the proper pull-up, and use ICSP for field updates. Choose the LF variant when operating below 4.5V, and the standard PIC16F872-I/SP when a 4.5V-5.5V supply is guaranteed and EEPROM endurance is the same.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF872-I/SP — 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 PIC16LF872-I/SP (cùng hình factor và footprint) — khác nhau ở Package, Timers, Core Architecture, Data EEPROM, ADC.
PIC16LF872-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F872-I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F882-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F88-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F870-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF872-I/SP Tỷ lệ tối đa & tính chất điện
| Core | PIC16 (8-bit RISC) |
| Program Memory | 3.5 KB (2K x 14 words) Flash |
| Data SRAM | 128 bytes |
| Data EEPROM | 64 bytes |
| Tần số xung maksimum | 20 MHz |
| Instruction Cycle | 200 ns |
| Điện áp cung cấp hoạt động | 2.0 V to 5.5 V |
| I/O Pins | 22 |
| ADC | 5 channels x 10-bit |
| Timers | 1 x 8-bit, 1 x 16-bit |
| Serial Interfaces | 1 x MSSP (SPI/I2C), 1 x USART (SCI) |
| Hộp | 28-SPDIP (Skinny DIP, 0.300 inch / 7.62mm) |
| Kiểu lắp đặt | Through-Hole |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Instruction Set | 35 single-word instructions |
| Trạng thái RoHS | Compliant |
| Programming/Debug | ICSP + ICD (In-Circuit Debugger) |
Cấu hình chân PIC16LF872-I/SP
| Chân 1 | MCLR/VPP — Master Clear (active-low reset) / ICSP programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input channel 2 / ADC VREF- |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input channel 3 / ADC VREF+ |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer 0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / Analog input channel 4 / SPI slave select |
| Chân 8 | VSS — Ground |
| Chân 9 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 10 | OSC2/CLKOUT — Oscillator output / clock output |
| Chân 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer 1 oscillator output / Timer 1 clock input |
| Chân 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer 1 oscillator input / CCP2 |
| Chân 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Chân 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 17 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 18 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 19 | VSS — Ground |
| Chân 20 | VDD — Positive supply (2.0V-5.5V) |
| Chân 21 | RB0/INT — PORTB bit 0 / External interrupt |
| Chân 22 | RB1 — PORTB bit 1 |
| Chân 23 | RB2 — PORTB bit 2 |
| Chân 24 | RB3/PGM — PORTB bit 3 / ICSP low-voltage programming |
| Chân 25 | RB4 — PORTB bit 4 |
| Chân 26 | RB5 — PORTB bit 5 |
| Chân 27 | RB6/PGC — PORTB bit 6 / ICSP clock (ICD) |
| Chân 28 | RB7/PGD — PORTB bit 7 / ICSP data (ICD) |
Ứng dụng tiêu biểu
PIC16LF872-I/SP phù hợp cho 7 Áp dụngs: Battery-Powered Sensor Interface, Industrial HVAC Control Module, Remote Control Transmitter, Small Appliance Control Board, Educational Microcontroller Platform, USB to UART Bridge / Data Logger, Automotive Aftermarket Accessory Controller.
Battery-Powered Sensor Interface
The PIC16LF872-I/SP's 2.0V-5.5V supply range makes it ideal for direct operation from two AA alkaline or lithium primary cells, eliminating the need for boost regulators. Its 5-channel 10-bit ADC handles typical sensor inputs (temperature via thermistor, light via LDR, battery voltage via divider) at sample rates up to 200 ksps, while the integrated USART reports readings to a host. With 3.5KB Flash, 128B SRAM, and the SLEEP instruction (current in microamps), the MCU can duty-cycle between long sleeps and brief ADC bursts - typical designs achieve average current under 100uA, extending battery life to multiple years in low-duty applications.
Được đề xuất
Industrial HVAC Control Module
The PIC16LF872-I/SP's industrial temperature grade (-40C to +85C) and 5 ADC channels suit HVAC controllers measuring zone temperature, return air, mixed air, and supply voltage. The MSSP (SPI/I2C) port drives an LCD display or EEPROM for setpoint storage, while the USART provides RS-485 connectivity to building automation networks. The 20MHz clock and 200ns instruction cycle ensure responsive PID control loops without compromising real-time interrupt handling. With 35 single-word instructions, firmware development in MPLAB X with XC8 is fast, and ICSP allows field firmware updates via the MCLR pin without removing the board.
Được đề xuất
Remote Control Transmitter
For handheld remote controls, the PIC16LF872-I/SP's 22 I/O pins can scan 4x5 key matrices with debouncing in software, while the LF variant's 2.0V-5.5V supply lets a single CR2032 coin cell (3V) power the entire design. The 16-bit timer can drive infrared carrier generation at 38kHz or 56kHz, and the MSSP/SPI port optionally drives an RF transceiver. With SLEEP current in the microamp range and fast wake-up, average power consumption stays well under 10uA in typical use, giving multi-year battery life. The 28-SPDIP package simplifies hand-soldering for prototypes and small batches.
Được đề xuất
Small Appliance Control Board
Coffee makers, toasters, and blenders use the PIC16LF872-I/SP for timing, temperature monitoring, and user interface handling. The 10-bit ADC reads NTC thermistor voltage for temperature control, while PWM generated via the 16-bit timer drives a TRIAC for AC power control. The 22 I/O pins accommodate keypad input, LED indicators, and a 7-segment display. With 3.5KB Flash and Microchip's mature PIC toolchain (MPLAB X + XC8), firmware can be developed and debugged via ICSP without external emulator hardware, reducing BOM cost in a price-sensitive consumer appliance market.
Được đề xuất
Educational Microcontroller Platform
The PIC16LF872-I/SP is a popular choice for university embedded systems courses and hobbyist learning because the 28-SPDIP package fits standard 0.300 inch DIP sockets, allowing easy replacement and reuse. The 35-instruction RISC architecture is approachable for assembly-language instruction, and Microchip's free MPLAB X IDE with XC8 C compiler supports modern development workflows. With 3.5KB Flash, students can implement meaningful projects (stopwatch, calculator, simple games) within the memory budget. ICSP and built-in ICD eliminate the need for separate debug hardware, and the 2.0V-5.5V range allows breadboard experimentation with various power sources.
Được đề xuất
USB to UART Bridge / Data Logger
When paired with an external USB-to-serial bridge such as the MCP2200 or FT232, the PIC16LF872-I/SP can act as the brain of a low-cost data logger. The 5 ADC channels sample analog signals (strain gauge, pressure, voltage), the USART streams readings to a PC, and the MSSP port optionally writes to an external SPI Flash for non-volatile storage. With 3.5KB Flash and 128B SRAM, the MCU handles buffering, time stamping via timer interrupts, and protocol framing. The LF variant's 2.0V supply compatibility supports battery-powered field loggers; the 28-SPDIP package simplifies hand-soldered prototypes.
Được đề xuất
Automotive Aftermarket Accessory Controller
For non-safety automotive accessories (LED interior lighting, auxiliary fans, custom gauges), the PIC16LF872-I/SP offers sufficient performance and I/O. The industrial -40C to +85C temperature range covers most cabin environments, the 5-channel 10-bit ADC reads sensor inputs, and the PWM timers drive LED dimming or motor speed control. The 28-SPDIP package is rugged for under-dash mounting. Note: for safety-critical automotive applications, prefer the AEC-Q100-qualified PIC16F family member with proper automotive validation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF872-I/SP — 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 | PIC16LF872-I/SO | PIC16F872-I/SP | PIC16F882-I/SP | PIC16F88-I/P | PIC16F870-I/SP |
|---|---|---|---|---|---|---|
| Package | 28-SPDIP (through-hole) | SOIC-28 wide (SMT) - same die | 28-SPDIP (through-hole) - same footprint | 28-SPDIP (through-hole) - same footprint | 28-PDIP wider footprint - same pin family | 28-SPDIP (through-hole) - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Supply Voltage | 2.0V - 5.5V | 2.0V - 5.5V | 4.5V - 5.5V | 4.5V - 5.5V | 4.5V - 5.5V | 4.5V - 5.5V |
| Flash Memory | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 7 KB | 1.75 KB |
| SRAM | 128 B | 128 B | 128 B | 256 B | 368 B | 64 B |
| ADC Channels x Resolution | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 11 x 10-bit | 7 x 10-bit | 5 x 10-bit |
| I/O Pins | 22 | 22 | 22 | 28 | 23 | 22 |
| Lifecycle Status | Active | Active | Active | Active | Active | Active |
Bảo phân biệt quan trọng
- Lower minimum supply voltage than F-variant (vsPIC16F872-I/SP)
- Through-hole SPDIP simplifies prototyping (vsPIC16LF872-I/SO)
- Smaller memory but lower cost than PIC16F88 (vsPIC16F88-I/P)
Ghi chú thiết kế
Decouple VDD with a 100nF ceramic capacitor placed within 5mm of the pin, plus a 10uF bulk capacitor if the supply traces are longer than 50mm. The PIC16LF872-I/SP draws approximately 2-15mA active at 20MHz depending on I/O loading; during SLEEP, current drops to microamp range. For battery designs, use the LF variant's 2.0V minimum to enable direct 2x AA or CR2032 operation. Always include a power-on reset delay implemented in firmware by enabling the PWRT and OST configuration bits.
Configure MCLR (pin 1) with a 10k pull-up to VDD if not used as an external reset input; leaving MCLR floating can cause spurious resets. The ICSP/ICD pins (RB6/PGClock, RB7/PGData) must not be used for high-current loads during debug sessions. When using the ADC, add source impedance under 10kOhm to avoid acquisition errors - the S/H capacitor needs time to settle. Brown-out reset (BOR) should be enabled for robust operation on noisy supplies.
For the 28-SPDIP package, allocate 0.300 inch (7.62mm) row spacing with standard 0.100 inch (2.54mm) pitch through-holes. The exposed die pad is on the bottom of the DIP package; provide thermal relief on ground planes but keep VDD traces short and wide. Place the decoupling capacitor as close to pin 20 (VDD) as possible, ideally with a via-free trace. Route the oscillator traces (OSC1/OSC2) short and away from high-current switching signals to avoid clock jitter.
For ICSP/ICD operation, expose RB6/PGC and RB7/PGD plus MCLR/VPP and VDD/VSS on a 6-pin header (standard RJ-12 or 0.1-inch header). Add a current-limiting resistor (typically 470 ohm) in series with MCLR if external reset components (buttons, supervisory ICs) drive it. Route the analog inputs RA0-RA5 away from digital switching signals; place a ground guard ring around sensitive analog traces to reduce crosstalk into the ADC.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Lead-free matte-tin plating on SPDIP pins. AEC-Q100 not applicable for non-automotive IC. Conflict-mineral reporting (CMRT) available from Microchip.
