PIC18LF1220T-I/ML - 8-Bit 40MHz 4KB Flash MCU | Microchip
MPN: PIC18LF1220T-I/ML ✓ Hoạt độngPIC18LF1220T-I/ML Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and programmable peripherals. The PIC18F architecture is an 8-bit enhanced Harvard RISC family from Microchip featuring 200 ns instruction execution at 40 MHz, 16-bit instructions, a hardware multiplier, and a rich peripheral set. Within the broader taxonomy, the PIC18F sits in the hierarchy MCU -> 8-bit microcontroller -> embedded controller -> semiconductor. The 'LF' prefix denotes the low-voltage PIC18 family variant, supporting operation down to 2.0 V, while the '1220' sub-family provides 4 KB Flash in the entry-level PIC18 lineup.
Key features of the PIC18LF1220T-I/ML include 4 KB of self-programmable Flash, 256 bytes of SRAM, hardware USART, MSSP (SPI/I2C), a 10-bit ADC with up to 7 channels, nanoWatt Technology for ultra-low-power sleep, and an industrial temperature grade of -40C to +85C. The 28-QFN package integrates an exposed thermal pad that simultaneously serves as the package ground and a heat-spreading path, enabling compact PCB designs with strong thermal dissipation for the LF voltage range.
The PIC18LF1220T-I/ML uses Microchip's enhanced Harvard RISC architecture with separate code and data buses, a 16-bit instruction word, and 32-level hardware stack. Its nanoWatt technology combines multiple idle/sleep states, oscillator switching, and peripheral disabling to achieve quiescent currents under 1 uA in deep sleep, making it well-suited for battery-powered systems that wake periodically to perform short sensor-acquisition or communication tasks.
Typical applications include low-power IoT sensor nodes, battery-operated industrial sensors, consumer remote controls, HVAC thermostats, white goods and appliance controls, and portable medical accessories. The wide 2.0-5.5 V supply range simplifies designs powered from single-cell Li-ion (3.7 V nominal), two-cell alkaline (3 V), or regulated 5 V rails, and the integrated 10-bit ADC eases analog-sensor interfacing without external converters.
Designers should budget flash and RAM size for 4 KB / 256 bytes, leverage the QFN exposed pad as the main ground return, place a 100 nF decoupling capacitor within 2 mm of VDD, and use MPLAB X IDE + XC8 compiler for code development. Programming is supported via ICSP (In-Circuit Serial Programming) using PGD/PGC lines. The 'T' suffix indicates tape-and-reel packaging, while 'I' indicates the industrial -40C to +85C operating temperature grade.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes beyond the manufacturer datasheet summary, providing trade-off context for engineers evaluating the PIC18LF1220T-I/ML against PIC18F1220 and PIC18LF1320 alternatives.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF1220T-I/ML — 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 PIC18LF1220T-I/ML (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Core Architecture, Operating Voltage Range, Package, ADC.
PIC18LF1220T-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF1220T-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF1220T-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF1220-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF1320T-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF1220T-I/ML Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18F 8-bit enhanced RISC Harvard |
| Maximum CPU Frequency | 40 MHz |
| Instruction Cycle Time | 200 ns at 40 MHz |
| Program Memory (Flash) | 4 KB (2K x 16 instructions) |
| Data Memory (SRAM) | 256 bytes |
| I/O Pins | 16 |
| Operating Voltage Range | 2.0 V to 5.5 V (LF: 2.5/3.3/5 V) |
| Communication | 1x USART (EUSART), 1x MSSP (SPI / I2C) |
| Nhiệt độ hoạt động | -40C to +85C (Industrial, 'I') |
| Hộp | 28-QFN 6x6 mm with exposed pad (ML) |
| Packaging Form | Tape & Reel ('T' suffix) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Low-Power Features | nanoWatt Technology (idle/sleep, oscillator switching) |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
Cấu hình chân PIC18LF1220T-I/ML
| Chân 1 | MCLR/VPP/AN0 — Master Clear (reset) input / ICSP programming voltage / analog input 0 |
| Chân 2 | RA0/AN0 — Digital I/O / analog input 0 (note: pin 1 is MCLR/VPP; pin 2 is RA0) |
| Chân 3 | RA1/AN1 — Digital I/O / analog input 1 |
| Chân 4 | RA2/AN2/VREF- — Digital I/O / analog input 2 / ADC negative reference |
| Chân 5 | RA3/AN3/VREF+ — Digital I/O / analog input 3 / ADC positive reference |
| Chân 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — Digital I/O / analog input 4 / SPI slave select |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/RA7/CLKI — Oscillator input / digital I/O / external clock input |
| Chân 10 | OSC2/RA6/CLKO — Oscillator output / digital I/O / clock output |
| Chân 11 | RC0/T1OSO/T13CKI — Digital I/O / Timer1 oscillator output / Timer1/Timer3 clock input |
| Chân 12 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 output |
| Chân 13 | RC2/CCP1 — Digital I/O / CCP1 output |
| Chân 14 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Chân 15 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Chân 16 | RC5/SDO — Digital I/O / SPI data out |
| Chân 17 | RC6/TX/CK — Digital I/O / EUSART TX / clock |
| Chân 18 | RC7/RX/DT — Digital I/O / EUSART RX / data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage (2.0-5.5 V) |
| Chân 21 | RB0/INT0/AN12 — Digital I/O / external interrupt 0 / analog input 12 |
| Chân 22 | RB1/INT1/AN10 — Digital I/O / external interrupt 1 / analog input 10 |
| Chân 23 | RB2/INT2/AN8 — Digital I/O / external interrupt 2 / analog input 8 |
| Chân 24 | RB3/AN9/CCP2 — Digital I/O / analog input 9 / CCP2 output (alt) |
| Chân 25 | RB4/AN11 — Digital I/O / analog input 11 |
| Chân 26 | RB5/PGM/AN13 — Digital I/O / LVP programming / analog input 13 |
| Chân 27 | RB6/PGC — Digital I/O / ICSP clock |
| Chân 28 | RB7/PGD — Digital I/O / ICSP data |
| Chân 29 | EP — Exposed thermal pad - tie to VSS (ground) for thermal dissipation |
Ứng dụng tiêu biểu
PIC18LF1220T-I/ML phù hợp cho 7 Áp dụngs: Battery-Powered IoT Sensor Node, Consumer Remote Control, HVAC Thermostat Controller, White Goods Appliance Control, Portable Medical Accessory, Industrial Sensor Transmitter, LED Lighting Controller.
Battery-Powered IoT Sensor Node
The PIC18LF1220T-I/ML is a strong fit for battery-powered IoT sensor nodes because its LF (low-voltage) family extends operation down to 2.0 V, allowing deeper discharge of single-cell Li-ion (3.7 V nominal) and 2x alkaline (3 V) batteries. The 4 KB Flash and 256 B SRAM handle small firmware workloads such as periodic sensor sampling, threshold logic, and LoRa/Sigfox TX buffers, while nanoWatt Technology drops quiescent current under 1 uA in deep sleep. Placed between the battery and a sensor front-end (e.g., temperature/humidity), it wakes via watchdog or external interrupt, takes a 10-bit ADC reading, transmits, and sleeps. Compared to a PIC18F1220, the LF variant is the right choice when the rail sags below 4.2 V.
Được đề xuất
Consumer Remote Control
The PIC18LF1220T-I/ML suits IR/RF consumer remote controls where 4 KB Flash holds button-scan tables, IR protocol state machines (RC5, NEC, SIRC), and pairing logic, while 256 B SRAM buffers TX frames. Its 16 GPIO drive an 8x8 keypad matrix or capacitive touch buttons, and the EUSART interfaces to RF transmitters (e.g., sub-GHz OOK/FSK modules). Operating from 2-3 V coin-cell or 2x AAA, the LF family's wide VDD envelope maximizes battery life. The 28-QFN 6x6 mm footprint fits inside slim remote enclosures. Designers can reuse firmware across the PIC18LF1220T-I/SS (28-SSOP) for higher-volume reflow lines without code changes.
Được đề xuất
HVAC Thermostat Controller
The PIC18LF1220T-I/ML can serve as the user-interface and control MCU in residential HVAC thermostats where the 10-bit ADC reads temperature sensors (NTC or analog temp IC), the EUSART talks to a Wi-Fi module (e.g., ESP8266 via UART), and 16 GPIO drive LCD segments, buttons, and relay drivers for HVAC mode control. The 4 KB Flash holds scheduling logic and PID loops for simple on/off control. Operating from a 24 VAC transformer + rectifier + 3.3 V LDO, the LF variant's 2.0-5.5 V VDD tolerance allows direct regulation. Its industrial -40C to +85C temperature rating handles thermostat enclosure thermal stress.
Được đề xuất
White Goods Appliance Control
The PIC18LF1220T-I/ML fits white-goods control boards (washing machines, dishwashers, microwave ovens) where 4 KB Flash holds state-machine logic for cycles, 256 B SRAM tracks countdown variables, and the 10-bit ADC monitors motor current/voltage feedback via shunt. The 28-QFN exposed pad acts as ground return and heat-spreader, critical in appliance underhood thermal environments. The industrial -40C to +85C rating covers appliance operation. nanoWatt low-power modes drop standby consumption to meet energy-star standby budgets (<0.5 W) when the appliance is idle but plugged in.
Được đề xuất
Portable Medical Accessory
The PIC18LF1220T-I/ML supports portable medical accessories (e.g., pill dispensers, portable pulse-oximeter interfaces, Bluetooth bridges) where its LF voltage envelope allows 2x alkaline or single-cell Li-ion battery operation, 4 KB Flash holds simple dosing/event logic, and the EUSART links to a Bluetooth HC-05/HC-06 module or BLE SoC for smartphone pairing. The 10-bit ADC reads battery voltage for accurate fuel-gauging, supporting safer medical-device operation. Designers must validate the medical device's full regulatory path (FDA 510(k) Class I/II) - this part is not AEC-Q100 qualified and is not suited for automotive safety-critical paths.
Được đề xuất
Industrial Sensor Transmitter
The PIC18LF1220T-I/ML is a fit for industrial 4-20 mA loop-powered sensor transmitters, where its 2.0-5.5 V LF envelope operates directly from the 4 mA loop voltage after a regulator, and the 10-bit ADC digitizes a bridge sensor (pressure, strain gauge) signal conditioned by an external op-amp. The 4 KB Flash holds calibration coefficients, linearization, and HART or IO-Link lite protocol state machines. The industrial -40C to +85C rating meets factory-floor temperature requirements. Its nanoWatt Technology drops quiescent current so the entire transmitter stays within the 4 mA loop budget, preserving measurement accuracy.
Được đề xuất
LED Lighting Controller
The PIC18LF1220T-I/ML controls entry-level LED drivers and decorative lighting controllers where the 10-bit ADC reads ambient light sensors or potentiometers for dimming, and 16 GPIO drive MOSFET gates (via gate drivers) for LED strings. The 4 KB Flash holds dimming curves, color-mixing tables for RGB, and standby/eco modes, while nanoWatt Technology keeps standby consumption low. The LF variant supports direct operation from 2-3 alkaline cells in portable LED fixtures. The 28-QFN exposed pad provides solid thermal dissipation for moderate-load applications.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF1220T-I/ML — 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 | PIC18LF1220T-I/SS | PIC18LF1220T-I/SO | PIC18LF1220-I/ML | PIC18LF1320T-I/ML |
|---|---|---|---|---|---|
| Package | 28-QFN 6x6 mm (ML) | 28-SSOP (different PCB footprint) | 28-SOIC wide (different PCB footprint) | 28-QFN ML (same footprint, tube packaging) | 28-QFN ML (same footprint, larger Flash) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 4 KB (2K x 16) | 4 KB | 4 KB | 4 KB | 8 KB (+100%) |
| Data SRAM | 256 bytes | 256 B | 256 B | 256 B | 256 B |
| Operating 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 | 16 | 16 | 16 | 16 | 16 |
| CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Packaging | Tape & Reel | Tape & Reel | Tape & Reel | Tube | Tape & Reel |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
Bảo phân biệt quan trọng
- Wide 2.0-5.5 V low-voltage operation (vsPIC18F1220T-I/ML)
- Largest Flash in 28-QFN LF family at lowest cost point (vsPIC18LF1220T-I/SS)
- Direct Flash-upgrade path on the same 28-QFN footprint (vsPIC18LF1220T-I/ML)
Ghi chú thiết kế
Decoupling: place a 100 nF ceramic capacitor (X7R, 10 V or higher rating) within 2 mm of the VDD pin (pin 20) and tie its ground lead directly to the QFN exposed pad (pin 29). Add a bulk 10 uF capacitor on the VDD rail within 10 mm to handle switching transients from peripherals like EUSART-driven RF modules. The exposed pad is the primary ground return; do not skip stitching the EP to the ground plane with at least 9 thermal vias in a 3x3 array for adequate thermal performance at 40 MHz operation.
Configuration word and ICSP: the PIC18LF1220T-I/ML is programmed via ICSP on PGC (RB6) and PGD (RB7), which doubles as GPIO. If your application uses RB6/RB7 as outputs, add 4.7 kohm pull-downs on PGC/PGD to allow in-circuit programming without contention. Do not leave the MCLR pin floating - tie it to VDD through a 10 kohm pull-up with a 100 nF cap to ground for noise immunity; floating MCLR is a leading cause of spurious resets in industrial environments.
Estimated power and thermal: at 40 MHz, 3.3 V VDD, all peripherals active, the PIC18LF1220 draws approximately 11 mA active (typical) and under 1 uA in sleep. Power dissipation is roughly 36 mW active and 3.3 uW sleep - well within the 28-QFN's thermal envelope. The 28-QFN with a properly stitched EP delivers theta_JA around 30-35 C/W on a 2-layer 1-oz board, so a 50 C ambient rise yields only 1.8 C junction rise. No external heatsink is required for the part itself, but the EP MUST be soldered to a ground plane for this thermal performance.
QFN land pattern and soldering: the 28-QFN 6x6 mm land pattern follows JEDEC HVQCCN (also called QFN-28 MLF) with a 0.5 mm pitch and a 4.1 mm x 4.1 mm center EP pad. Use NSMD (non-solder mask defined) pads with a 0.2-0.3 mm solder mask expansion to improve solder joint reliability. For hand prototyping or low-volume, use a hot plate or hot air; standard 260 C reflow per JEDEC J-STD-020 is supported (MSL3). Inspect the EP solder joint with X-ray or cross-section in high-reliability builds because a poorly wetted EP is the most common QFN reliability failure mode.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page; not AEC-Q100 qualified (industrial grade only, not automotive). PIC18LF family parts do not include 'Q' or 'Q1' suffixes - automotive users should select PIC18F variants with /VAO suffixes or PIC18FxxQxx families.
