PIC16LF872T-I/SO - 8-bit 20MHz MCU, 3.5KB Flash, 28-SOIC | Microchip
MPN: PIC16LF872T-I/SO ✓ Hoạt độngPIC16LF872T-I/SO Tóm tắt
What is a PIC16 microcontroller? The PIC16 family is Microchip's mid-range 8-bit RISC microcontroller line, sitting between the baseline PIC10/12/16 families and the high-performance PIC18 and dsPIC lines. PIC16 MCUs use a 14-bit instruction word, Harvard architecture, and 35 single-word instructions, providing deterministic execution at speeds up to 200ns per instruction. They integrate Flash program memory, EEPROM data memory, RAM, multiple timers, ADC, USART, and I/O in a single chip, making them suited for embedded control where cost and pin count dominate.
Key features include 22 digital I/O pins, a 5-channel 10-bit Analog-to-Digital Converter (ADC), one 8-bit and two Capture/Compare/PWM (CCP) modules, a USART for serial communication, and an ICD (In-Circuit Debug) interface for development. The 28-SOIC (300-mil) package provides ample I/O headroom for mixed analog/digital designs, while the industrial -40C to +85C operating range supports outdoor and factory-floor deployment.
The PIC16LF872 uses CMOS Flash technology, supporting self-programming in the field and 100K erase/write cycles typical endurance. Its 10-bit ADC delivers conversion rates suitable for sensor monitoring, while the USART enables RS-232/RS-485 communication links. The architecture is upwards compatible with the PIC16C5X, PIC12CXXX, and PIC16C7X families, simplifying code migration from older designs.
Typical applications include industrial sensor interfaces, low-power remote control nodes, HVAC control boards, motor control peripherals, and small appliance user-interface controllers. The wide voltage range and integrated peripherals allow the part to serve as a single-chip brain for both battery-powered and mains-derived systems.
When designing with this part, ensure that the Vdd decoupling capacitor is placed within 6mm of the Vdd pin and that the MCLR reset network uses a 10k pull-up with a 100nF to ground for reliable in-circuit programming. The PIC16LF872 is one of Microchip's legacy parts and is generally used for cost-sensitive and long-lifecycle designs.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF872T-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 PIC16LF872T-I/SO (cùng hình factor và footprint) — khác nhau ở Core Architecture, Package, In-Circuit Debug, ADC, Supply Voltage Range.
PIC16F872T-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF872-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF872T-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF882T-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF883T-I/SO
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF872T-I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16 (8-bit RISC) |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| Data RAM | 128 bytes |
| Data EEPROM | 64 bytes |
| CPU Speed | 20 MHz (200 ns instruction cycle) |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Digital I/O Pins | 22 |
| ADC | 5 channels x 10-bit |
| Timers | 3 (Timer0, Timer1, Timer2) |
| CCP Modules | 2 (8-bit + 16-bit) |
| Serial Interface | USART (SCI) + I2C/SPI (SSP) |
| Hộp | 28-SOIC (7.50 mm wide) |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| In-Circuit Debug | ICD supported |
| Program Memory Endurance | 100K erase/write cycles typical |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16LF872T-I/SO
| Chân 1 | MCLR/Vpp — Master Clear / Programming voltage input |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 4 | RA2/AN2/CVREF — PORTA bit 2 / Analog input 2 / Comparator Voltage Reference |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC Vref+ |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| Chân 8 | Vss — Ground reference |
| Chân 9 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 10 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Chân 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Chân 13 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 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 / clock |
| Chân 18 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Chân 19 | Vss — Ground reference |
| Chân 20 | Vdd — Positive supply (2.0V to 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 / Low-voltage programming |
| Chân 25 | RB4 — PORTB bit 4 |
| Chân 26 | RB5/PGM — PORTB bit 5 / Programming clock |
| Chân 27 | RB6/PGC — PORTB bit 6 / ICD programming clock |
| Chân 28 | RB7/PGD — PORTB bit 7 / ICD programming data |
Ứng dụng tiêu biểu
PIC16LF872T-I/SO phù hợp cho 7 Áp dụngs: Industrial Sensor Interface Boards, Battery-Powered Remote Control Nodes, HVAC Control Boards, Small Appliance User-Interface Controllers, Motor Control Peripherals, Security Keypads and Access Modules, Test & Measurement Probe Heads.
Industrial Sensor Interface Boards
The PIC16LF872T-I/SO fits industrial sensor-interface boards because its 5-channel 10-bit ADC, 22 I/O pins, and 2.0-5.5V wide-voltage operation allow direct connection to 3.3V digital sensors and 5V analog conditioning circuits. Its 200ns instruction execution handles 4-20mA loop measurements, switch debouncing, and HMI scanning in real time without offloading. The 28-SOIC footprint provides ample pad area for hand-rework on production lines. Compared to newer F882/F883, the LF872 remains preferred for cost-sensitive industrial retrofits because its 100K Flash endurance exceeds typical sensor-board lifetime.
Được đề xuất
Battery-Powered Remote Control Nodes
The PIC16LF872T-I/SO suits battery-powered remote control nodes because the LF family operates down to 2.0V, allowing designs to extract the last 20% of cell capacity from alkaline or Li-primary cells where 5V-only PIC16F parts would brown-out. The MCU's typical 1.6mA at 4MHz and integrated sleep modes enable multi-year coin-cell operation for door sensors, asset trackers, and irrigation valves. Its 22 I/O directly drive low-side MOSFETs and read tamper switches without external logic. The 28-SOIC tape-and-reel format supports high-volume pick-and-place assembly.
Được đề xuất
HVAC Control Boards
The PIC16LF872T-I/SO fits HVAC control boards because its 5x10-bit ADC reads thermistor and pressure sensor arrays, while its two CCP modules drive triac phase-control outputs for fan/blower speed regulation. The industrial -40C to +85C temperature range tolerates rooftop unit environments, and the 64-byte EEPROM stores calibration constants without external NVRAM. The USART links to BMS gateways for building automation. Compared to mid-range Cortex-M0 alternatives, the LF872's deterministic instruction timing simplifies IEC 60730 software-class-B safety certification.
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Small Appliance User-Interface Controllers
The PIC16LF872T-I/SO works as the brain for small appliance user-interface controllers because its 22 I/O scan 4x4 key matrices, drive 7-segment LED displays, and read potentiometer inputs without external I/O expanders. The 2.0-5.5V operation supports both 3.3V Li-ion and 5V mains-derived supplies, simplifying global SKU designs. The 28-SOIC package is hand-solderable for serviceability in warranty-repair centers. Compared to PIC16F1xxx enhanced cores, the LF872's simpler instruction set reduces firmware complexity for appliance OEMs with rotating engineering teams.
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Motor Control Peripherals
The PIC16LF872T-I/SO functions in motor control peripherals such as brushless DC fan controllers, stepper indexers, and small pump drivers because its two CCP modules produce complementary PWM outputs with programmable dead-band control. The 20MHz CPU provides 200ns resolution for closed-loop PID at 30 kHz PWM frequency. The 2.0-5.5V operation suits 24V industrial rails with simple linear regulation. The 28-SOIC exposed thermal pad simplifies heatsinking for high-side gate driving at 1A switching peaks.
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Security Keypads and Access Modules
The PIC16LF872T-I/SO serves security keypads and access modules because its 22 I/O drive 12-key capacitive touch matrices, read fingerprint sensors via USART, and trigger magnetic locks via CCP/PWM at 2.0V battery backup. The 100K Flash endurance supports frequent credential updates without memory wear concerns, and the 64-byte EEPROM stores access logs. The 28-SOIC form factor fits inside compact card-reader housings. Compared to more expensive Cortex-M0+ parts, the LF872 cuts BOM cost by approximately 40% on access-control reader modules.
Được đề xuất
Test & Measurement Probe Heads
The PIC16LF872T-I/SO is used in test & measurement probe heads because its 5x10-bit ADC samples thermocouples, current shunts, and photodiodes at 1 kS/s aggregate rate with hardware averaging. The 20MHz core handles RS-485 packetization to handheld DMM hosts. The wide 2.0-5.5V supply allows USB-powered probes and 9V-battery bench instruments alike. Compared to dedicated ADC chips, the integrated LF872 cuts component count from 4 chips (ADC, MCU, EEPROM, LDO) to 1, lowering probe-head BOM cost by 50%.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF872T-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 | PIC16F872T-I/SO | PIC16LF872-I/SO | PIC16LF882T-I/SO | PIC16LF883T-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 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 | 2.0 V to 5.5 V |
| Flash Memory | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) | 7 KB (4K x 14) |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 256 bytes |
| EEPROM | 64 bytes | 64 bytes | 64 bytes | 128 bytes | 256 bytes |
| ADC Channels | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 11 x 10-bit | 11 x 10-bit |
| CCP/PWM Modules | 2 (8-bit + 16-bit) | 2 (8-bit + 16-bit) | 2 (8-bit + 16-bit) | 2 (10-bit + 10-bit) | 2 (10-bit + 10-bit) |
| Digital I/O | 22 | 22 | 22 | 24 | 24 |
Bảo phân biệt quan trọng
- Wide-voltage 2.0-5.5V operation vs F-series 4.0-5.5V (vsPIC16F872T-I/SO)
- 28-SOIC package with industrial -40C to +85C rating (vsPIC16LF872T-I/SS (28-SSOP))
- Pin-compatible upgrade path to PIC16LF882/LF883 (vsPIC16LF882T-I/SO)
Ghi chú thiết kế
Place a 100nF decoupling capacitor within 6mm of the Vdd pin and a 10uF bulk capacitor on the same rail. The PIC16LF872T-I/SO draws approximately 1.6mA active at 5V/4MHz per the Microchip PIC16F872 datasheet. In sleep mode, current drops to under 1uA, but add a 100k series resistor on the MCLR line to limit inrush during power-up.
Use a 28-SOIC land pattern with 1.27mm pitch and at least 0.5mm annular ring for hand-solder rework. Keep the crystal traces short (<10mm) and surrounded by a ground pour to reduce EMI. The MCLR pull-up (10k) and the PGD/PGC traces must not run parallel to switching nodes for more than 5mm to avoid coupling programming glitches.
Do not confuse the LF872 (2.0-5.5V) with the F872 (4.0-5.5V) on a 3.3V-only rail: the F872 will brown-out. Configuration bits must be set correctly - particularly the oscillator selection (HS vs XT) and watchdog enable. Brown-out reset voltage should be set just below the minimum operating Vdd to prevent code runaway during power droops.
The PIC16LF872T-I/SO's analog inputs (RA0-RA5) must be bypassed with 100nF to Vref when used as ADC channels to prevent digital switching noise from coupling into the 10-bit conversion. For accurate ADC readings, place the analog section away from PWM outputs (CCP1/CCP2) and use separate analog/digital ground planes joined at a single point.
Thông tin tuân thủ
RoHS and REACH compliance per DigiKey and Microchip product page. Lead-free (Pb-free) matte-tin finish confirmed. Halogen-free status not explicitly stated in available data; marked unknown. AEC-Q100 not applicable - this is a general-purpose MCU, not an automotive-qualified part.
