PIC16LF72-I/SS - 8-Bit 20MHz MCU, 3.5KB Flash 28-SSOP | Microchip
MPN: PIC16LF72-I/SS ✓ Hoạt độngPIC16LF72-I/SS Tóm tắt
An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, optimized for low cost, deterministic real-time control, and ease of programming. Within the broader taxonomy, the PIC16LF72 belongs to the PIC microcontroller family > 8-bit MCU > Flash microcontroller > embedded microcontroller > integrated circuit > semiconductor. Its low-voltage (LF) variant specifically targets battery-powered and energy-efficient designs, while the PIC16 instruction set is fully upward-compatible with newer PIC16 enhanced cores, easing firmware migration.
Key features include a Harvard-architecture RISC CPU with 35 single-cycle instructions, 14-bit instruction word, 8-level hardware stack, and a programmable code-protection mechanism. The integrated brown-out-reset and power-on-reset improve field reliability, and the Flash-based program memory enables rapid in-system reprogramming via ICSP. The device operates over the -40C to +85C industrial temperature range, making it suitable for commercial and industrial embedded control.
Typical applications span consumer-electronics remote controls, small appliance motor control, sensor signal conditioning front-ends, simple protocol bridges (USART/I2C/SPI), and battery-backed instrumentation. The PIC16LF72's combination of small package footprint, integrated analog and serial peripherals, and low-voltage operation makes it a popular choice when a full PIC16 mid-range MCU is not required.
A key design consideration is the ADC acquisition-time and source-impedance budget: with a recommended source impedance below 10 kohm, an external op-amp buffer may be required when reading high-impedance sensors. Designers should also place a 0.1 uF decoupling capacitor within 5 mm of VDD and route analog/digital grounds back to a single star point to minimize conversion noise.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF72-I/SS — 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 PIC16LF72-I/SS (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, Timers, ADC, RoHS Status.
PIC16LF722-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF722A-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16LF723A-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF727-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F722-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F72-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF72-I/SS Tỷ lệ tối đa & tính chất điện
| Manufacturer | Microchip Technology |
| Series | PIC 16F |
| Core Processor | PIC16 |
| Core Size / Data Bus Width | 8-bit |
| Tần số xung maksimum | 20 MHz |
| Program Memory Size | 3.5 KB (2K x 14) Flash |
| Data RAM Size | 128 B |
| Number of I/O Pins | 22 |
| ADC Resolution | 8 bit, 5 channels |
| Supply Voltage (Operating) | 2 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Kiểu lắp đặt | SMD/SMT |
| Hộp | 28-pin SSOP (5.30 mm) |
| Connectivity | I2C, SPI, UART/USART |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Data EEPROM | Not present on this family |
| Watchdog Timer | Yes |
| Brown-out Reset / POR | Yes |
| Trạng thái RoHS | Compliant |
| Lead-Free / MSL | Lead-Free finish; MSL per package |
Cấu hình chân PIC16LF72-I/SS
| Chân 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage input |
| 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 — PORTA bit 2 / Analog input channel 2 |
| Chân 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input channel 3 / ADC voltage reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / Analog input channel 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 — PORTC bit 0 / Timer1 oscillator output |
| 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 / USART clock |
| Chân 18 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RB0/INT — PORTB bit 0 / External interrupt input |
| Chân 22 | RB1 — PORTB bit 1 |
| Chân 23 | RB2 — PORTB bit 2 |
| Chân 24 | RB3 — PORTB bit 3 |
| Chân 25 | RB4 — PORTB bit 4 |
| Chân 26 | RB5 — PORTB bit 5 |
| Chân 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Ứng dụng tiêu biểu
PIC16LF72-I/SS phù hợp cho 6 Áp dụngs: Consumer Remote Control Transmitter, Battery-Powered Sensor Front-End, Small Appliance Motor Control, Serial Protocol Bridge / Gateway, Industrial Indicator and Status Display, Compact Process-Control Replacement Module.
Consumer Remote Control Transmitter
The PIC16LF72-I/SS's 20 MHz PIC16 core, 128 B RAM, and 22 I/O pins are well-suited to consumer remote-control transmitters where the MCU generates IR carrier timing and debounces a key matrix. With the 2.0 V to 5.5 V supply range the LF72 runs from a single 3 V coin cell or two AAA batteries, eliminating boost converters. The 5-channel 8-bit ADC can read battery voltage for low-battery warning, and the Flash memory holds the protocol lookup table in-system, allowing last-minute firmware revisions. Unlike 32-bit ARM Cortex-M parts, the PIC16LF72 costs under $2 at volume and fits a 28-pin SSOP footprint that designers can route with two-layer FR4.
Được đề xuất
Battery-Powered Sensor Front-End
The PIC16LF72-I/SS integrates a 5-channel 8-bit ADC and an I2C/SPI/USART set that matches typical sensor-conditioning front-ends, while the 2.0 V to 5.5 V LF supply range lets it run directly from a single Li-coin or 2xAA battery. The 20 MHz clock is fast enough to oversample slow-moving thermistor or photocell signals, and the 128 B RAM is sufficient to buffer one second of samples before transmission. The PIC16LF72's brown-out-reset protects against brown-out-induced firmware corruption, a frequent failure mode in unattended sensor nodes. Compared with discrete logic, an integrated MCU like the PIC16LF72 cuts PCB area by half and reduces bill-of-materials count significantly.
Được đề xuất
Small Appliance Motor Control
The PIC16LF72-I/SS provides a 16-bit timer/counter plus 8-bit timers that generate PWM for small DC motor speed control in appliances like blenders, fans, and pumps. The 22 I/O pins easily drive H-bridge enable inputs and tachometer feedback signals, while the 5-channel 8-bit ADC samples motor current for soft-start. The -40 C to +85 C industrial temperature range meets appliance under-cabinet thermal stress, and the 3.5 KB Flash holds commutation tables and PI-control constants. The PIC16LF72 supersedes discrete analog motor-control boards with simpler firmware upgrades via ICSP, and it shares its peripheral set with PIC16LF722, easing future migration.
Được đề xuất
Serial Protocol Bridge / Gateway
The PIC16LF72-I/SS includes both an I2C/SPI synchronous serial port and a USART, allowing it to bridge between two buses - for example, I2C sensors to UART host or SPI peripherals to RS-232. The 20 MHz instruction rate sustains up to 5 Mbit/s SPI throughput, well above typical sensor-bus speeds. The 128 B RAM and 3.5 KB Flash fit small protocol-translation tables, and the 28-pin SSOP leaves enough I/O for status LEDs and configuration pins. Compared with hardware protocol converters, the PIC16LF72 is field-reprogrammable via ICSP, allowing late-stage bug fixes and last-minute protocol customization without respinning the PCB.
Được đề xuất
Industrial Indicator and Status Display
The PIC16LF72-I/SS drives 7-segment LED indicators and simple alphanumeric displays in industrial panels, with 22 I/O pins sufficient to multiplex four digits plus status LEDs. The 5-channel 8-bit ADC reads potentiometers or analog setpoints without an external ADC. The PIC16LF72's -40 C to +85 C range handles cabinet-ambient environments, and the brown-out-reset guards against voltage transients during heavy motor starts. Compared with HC595 shift-register-based discrete logic, the PIC16LF72 integrates scan logic, debouncing, and serial configuration in a single chip, reducing PCB complexity by 30-40%.
Được đề xuất
Compact Process-Control Replacement Module
The PIC16LF72-I/SS fits as a replacement MCU in legacy 8-bit industrial control modules where footprint, supply range, and field-availability matter more than raw compute. Its 20 MHz performance runs PID loops at sub-millisecond periods, and the integrated ADC with internal voltage reference minimizes external parts. The Flash-based program memory supports in-system firmware updates via ICSP, allowing module refurbishment without desoldering. Compared with obsolete 8051-class controllers, the PIC16LF72 offers lower power, more I/O, and a Microchip-supported toolchain (MPLAB X, XC8) that is actively maintained.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF72-I/SS — 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 | PIC16LF722-I/SS | PIC16LF722A-I/SS | PIC16LF723A-I/SS | PIC16LF727-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-28 (5.30 mm) | SSOP-28 (5.30 mm) - same | SSOP-28 (5.30 mm) - same | SSOP-28 (5.30 mm) - same | SSOP-28 (5.30 mm) - same |
| Core / Architecture | PIC16, 8-bit | PIC16, 8-bit | PIC16, 8-bit | PIC16, 8-bit | PIC16, 8-bit |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Program Memory | 3.5 KB (2K x 14) Flash | 3.5 KB Flash | 3.5 KB Flash | 7 KB Flash | 14 KB Flash |
| Data RAM | 128 B | 384 B (+200%) | 384 B (+200%) | 384 B (+200%) | 1 KB (+700%) |
| Supply Voltage | 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 | 22 | 25 (+3) | 25 (+3) | 25 (+3) | 25 (+3) |
| ADC | 5-ch, 8-bit | 8-ch, 8-bit | 8-ch, 8-bit | 11-ch, 8-bit | 11-ch, 8-bit |
Bảo phân biệt quan trọng
- Wider supply-voltage range than PIC16F72-I/SS (vsPIC16F72-I/SS)
- Drop-in upgrade with 3x RAM via PIC16LF722-I/SS (vsPIC16LF722-I/SS)
- 28-SSOP package footprint is the industry-standard 8-bit upgrade path (vsPIC16LF722A-I/SS)
Ghi chú thiết kế
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of VDD (pin 20) and a second one adjacent to VSS (pin 19 or 8). Add a 10 uF bulk capacitor at the regulator output if the MCU is more than 5 cm from the supply. The PIC16LF72 power-on-reset and brown-out-reset require a clean VDD ramp; if the supply has long rise times (RC-based), add an external reset supervisor.
Route analog signals (RA0-RA5) away from digital switching lines, especially RC3/RC4 (SPI/I2C) and the oscillator pins. Use a single star-ground tie-point connecting analog and digital grounds to pin 19/8 VSS. Keep the ADC traces short (<5 cm) and surround them with a grounded copper pour to reduce conversion noise. The 28-SSOP footprint has 0.65 mm pitch - ensure solder mask and paste stencil apertures follow the IPC-7351 nominal land pattern.
Do not exceed the absolute maximum supply of 5.5 V (LF72) - transients above this damage the device. When reading high-impedance analog sources through the 8-bit ADC, ensure source impedance is below 10 kohm or add an op-amp buffer; otherwise acquisition-time errors of 5-10 LSB are typical. The MCLR pin should be pulled up to VDD through a 10 kohm resistor; floating MCLR causes intermittent resets in noisy environments.
Thông tin tuân thủ
RoHS-compliant per Microchip product page; AEC-Q100 not applicable (industrial MCU family). Verify halogen-free status against specific reel lot if required.
