PIC18LF4220T-I/PT - 8-bit MCU 4KB Flash 36 I/O | Microchip
料号： PIC18LF4220T-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.67 | $3.67 |
| 10 | $3.45 | $34.50 |
| 100 | $3.05 | $305.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.45 | $2,450.00 |
PIC18LF4220T-I/PT 概述
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), working memory (RAM), non-volatile data memory (EEPROM), and a configurable set of peripherals (ADC, timers, communication ports, I/O). Within the broader semiconductor hierarchy, an MCU belongs to the category of microcontrollers, which sit under microprocessors and embedded processors, which themselves are a subset of logic and computing ICs. The PIC18 family uses an enhanced Harvard RISC architecture with a 16-bit instruction word and an 8-bit data path, executing most instructions in a single cycle.
Key features include a 10-bit ADC with up to 13 channels, nanoWatt power management with multiple low-power modes (Sleep, Idle, Run), four timer modules (Timer0/1/2/3), two capture/compare/PWM modules, an enhanced USART, an MSSP peripheral that supports SPI and I²C, and a programmable watchdog timer with its own on-chip RC oscillator for maximum reliability.
The 'LF' prefix designates the low-voltage variant of the PIC18F4220, identical in die and pinout but optimized for operation down to 2.0 V, suitable for battery-powered designs. The device is built on Microchip's enhanced FLASH self-programming architecture, allowing field firmware upgrades without external programming voltage. The 'T' suffix indicates tape-and-reel packaging for high-volume assembly.
Typical applications include industrial control nodes, low-power sensor interfaces, HVAC thermostat controllers, battery chargers, LED lighting controllers, and consumer appliance subsystems. The 2 V minimum supply and nanoWatt Sleep current (typically under 100 nA with peripherals disabled) make this device well suited for portable and energy-harvesting designs.
When designing with this MCU, ensure the ICSP (In-Circuit Serial Programming) pins PGC/PGD are accessible on the PCB to allow firmware updates in production. Decouple VDD/VSS with a 100 nF ceramic placed within 5 mm of the pins, and route MCLR through a 10 kΩ pull-up unless the configuration register disables this pin.
直接替换替代料： PIC18LF4220T-I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18LF4220T-I/PT （相同外形与封装尺寸） ——差异在于 Package, Timers, Program Memory (Flash), Communication, Core.
快速对比工具——选择替代料号进行并排对比：
PIC18F4220-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF4320-I/PT
✅ 直接替换✓ 有现货
$5.9 / 个
查看数据手册 →PIC18LF4420-I/PT
✅ 直接替换✓ 有现货
$5.71 / 个
查看数据手册 →PIC18LF4520-I/PT
✅ 直接替换✓ 有现货
$5.21 / 个
查看数据手册 →PIC18LF4220T-I/ML
✅ 直接替换✓ 有现货
$2.45 / 个
查看数据手册 →PIC18LF4220-I/ML
✅ 直接替换✓ 有现货
$4.61 / 个
查看数据手册 →PIC18F4520-I/PT
✅ 直接替换✓ 有现货
$4.05 / 个
查看数据手册 →PIC18LF4220T-I/PT 最大额定值与电气特性
| Core | PIC18 (8-bit RISC) |
| Program Memory | 4 KB Flash |
| Data RAM | 512 B |
| EEPROM | 256 B |
| 最大时钟频率 | 40 MHz |
| 工作电源电压 | 2.0 V to 5.5 V |
| Number of I/O | 36 |
| ADC | 10-bit, 13 channels |
| 封装 | TQFP-44 (PT) |
| 安装类型 | Surface Mount (Tape & Reel) |
| 工作温度 | -40 C to +85 C |
| 数据总线宽度 | 8 bit |
| Timers | 4 (Timer0/1/2/3) |
| CCP Modules | 2 (ECCP + CCP) |
| Communication | EUSART + MSSP (SPI/I2C) |
| Watchdog Timer | Yes (dedicated on-chip RC oscillator) |
| ICSP | In-Circuit Serial Programming supported |
| MSL 等级 | 3 (168 hours) |
| RoHS 状态 | Compliant |
PIC18LF4220T-I/PT 引脚配置
| 引脚 1 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| 引脚 2 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| 引脚 3 | RA2/AN2/VREF- — PORTA bit 2 / Analog input / DAC/ADC VREF- |
| 引脚 4 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input / DAC/ADC VREF+ |
| 引脚 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 6 | RA5/AN4/SS — PORTA bit 5 / Analog input / SPI slave select |
| 引脚 7 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog input |
| 引脚 8 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog input |
| 引脚 9 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog input |
| 引脚 10 | VDD — Positive supply (2.0 V to 5.5 V) |
| 引脚 11 | VSS — Ground reference |
| 引脚 12 | OSC1/CLKIN/RA7 — Crystal oscillator input / External clock in |
| 引脚 13 | OSC2/CLKOUT/RA6 — Crystal oscillator output / Clock out |
| 引脚 14 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator / Timer3 clock |
| 引脚 15 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator / CCP2 |
| 引脚 16 | RC2/CCP1 — PORTC bit 2 / CCP1 (PWM/ECCP) |
| 引脚 17 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 18 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 19 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 20 | RC6/TX/CK — PORTC bit 6 / EUSART TX / clock |
| 引脚 21 | RC7/RX/DT — PORTC bit 7 / EUSART RX / data |
| 引脚 22 | RB0/INT0/FLT0 — PORTB bit 0 / External interrupt 0 / ECCP fault |
| 引脚 23 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| 引脚 24 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| 引脚 25 | RB3/CCP2 — PORTB bit 3 / CCP2 (alt) |
| 引脚 26 | RB4 — PORTB bit 4 (interrupt-on-change) |
| 引脚 27 | RB5 — PORTB bit 5 (interrupt-on-change) |
| 引脚 28 | RB6/PGC — PORTB bit 6 / ICSP clock (programming) |
| 引脚 29 | RB7/PGD — PORTB bit 7 / ICSP data (programming) |
| 引脚 30 | VDD — Positive supply |
| 引脚 31 | VSS — Ground reference |
| 引脚 32 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| 引脚 33 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| 引脚 34 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| 引脚 35 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| 引脚 36 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| 引脚 37 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| 引脚 38 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| 引脚 39 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| 引脚 40 | AVDD — Analog supply voltage |
| 引脚 41 | AVSS — Analog ground |
| 引脚 42 | MCLR/VPP/RE3 — Master clear reset / Programming voltage / PORTE bit 3 |
| 引脚 43 | NC — Not connected (per datasheet) |
| 引脚 44 | NC — Not connected (per datasheet) |
典型应用
PIC18LF4220T-I/PT 适用于 7 应用s: Industrial Control Nodes, Battery-Powered Sensor Interfaces, HVAC Thermostat Controllers, LED Lighting Controllers, Consumer Appliance Subsystems, Automotive Body Electronics, USB Bootloader / Field-Upgradeable Devices.
Industrial Control Nodes
The PIC18LF4220T-I/PT's 40 MHz core, 36 I/O lines, and 4 KB of Flash with self-programming support make it a strong fit for distributed industrial controllers and sensor hubs in factory automation. The wide 2.0 V to 5.5 V supply range accepts both 24 V-bucked 5 V rails and battery-backed 3.3 V domains, simplifying supply design across mixed-voltage cabinets. Its nanoWatt Sleep modes keep idle nodes below 100 nA, which is critical for thousands of distributed sensor endpoints. The integrated 10-bit ADC with 13 channels handles analog sensor reads (temperature, pressure, current) without an external ADC. Pair with a PIC18LF26K80 for the CAN backbone and a PIC18LF25K50 for USB diagnostics.
推荐
Battery-Powered Sensor Interfaces
The PIC18LF4220T-I/PT's 2.0 V minimum supply and sub-100 nA Sleep current allow a single LiSOCl2 primary cell or 2× alkaline AA batteries to power multi-year sensor endpoints. Its 4 KB Flash holds a typical firmware stack for I2C temperature/humidity sampling, EEPROM logger, and BLE/Sub-GHz transmit control, while 512 B RAM is sufficient for sensor buffering. The 10-bit ADC delivers 0.5% absolute accuracy for battery voltage monitoring, enabling accurate state-of-charge estimation. The 40 MHz burst mode lets the MCU wake, sample, transmit, and return to Sleep in well under 10 ms, hitting average currents below 5 µA. Pair with PIC18LF14K22 for an ultra-low-cost node slave and MCP9700 for temperature sensing.
推荐
HVAC Thermostat Controllers
The PIC18LF4220T-I/PT fits HVAC wall thermostats and zone controllers that need a 40 MHz CPU, 36 I/O for keypad scanning, LCD drive, relay control, and a 10-bit ADC for thermistor readings. Its 4 KB Flash comfortably holds scheduling, hysteresis control, and a simple UI state machine. The ECCP module generates PWM outputs for modulating damper/valve actuators, while the MSSP peripheral drives SPI LCDs or I2C temperature/humidity sensor pairs. Operating from 2.0 V supports two-AA-cell backup for retaining time-of-day during power outages. Pair with MCP9808 for outdoor temperature, ENC28J60 for Ethernet connectivity, and PIC18LF26K22 for the main UI processor if more code room is needed.
推荐
LED Lighting Controllers
The PIC18LF4220T-I/PT drives addressable LED strips and dimmable constant-current LED drivers with its ECCP module and 4 timers, generating accurate PWM dimming up to 20 kHz for flicker-free output. Its 36 I/O are sufficient to drive up to 6 channels of PWM, plus DMX or DALI reception on the EUSART or MSSP peripheral. The 4 KB Flash holds color-mixing, dimming curves, and remote-receiver firmware. Operating from 2.0 V supports battery-powered or USB-powered LED fixtures for portable and stage lighting. Pair with PIC18LF25K22 for slave nodes and MCP2515 for CAN-based stage lighting networks.
推荐
Consumer Appliance Subsystems
The PIC18LF4220T-I/PT serves as the control core in small kitchen appliances, washing-machine sub-modules, dishwasher pumps, and other consumer appliance subsystems where 4 KB of Flash, 36 I/O, and 10-bit ADC are sufficient. Its nanoWatt technology keeps standby power low enough to meet Energy Star and EU EcoDesign standby limits (often under 0.5 W). The integrated EUSART links to a host UI panel, while the MSSP talks to I2C sensors for temperature, water level, or motor current feedback. The wide 2.0-5.5 V supply simplifies design across universal-input buck converters. Pair with PIC18LF26K42 for the UI processor and a TLP281 optocoupler for mains isolation.
推荐
Automotive Body Electronics
Although the PIC18LF4220T-I/PT is not AEC-Q100 qualified, it is widely used in non-critical automotive body-electronics modules such as interior lighting, mirror adjusters, seat-position memory, and accessory controllers. Its wide 2.0-5.5 V supply survives load-dump transients when paired with a TVS, and the -40 to +85 °C industrial temperature range covers cabin-mounted electronics. The 40 MHz CPU runs LIN-stack firmware easily, and the EUSART implements LIN master/slave on a single wire with a small external transceiver. For AEC-Q100-grade parts, PIC18F46K22-I/PT and PIC18F67K22-I/PT are automotive-grade drop-in alternatives. Pair with MCP2551 for CAN, MCP2515 for CAN controllers, and TLE4271 for 5V automotive LDO.
推荐
USB Bootloader / Field-Upgradeable Devices
The PIC18LF4220T-I/PT's 4 KB Flash with self-programming capability and built-in ICSP pins (PGC/PGD) makes it a strong fit for low-cost field-upgradeable devices that need in-application firmware updates without external programming voltage. Designers can hold a small bootloader in a protected Flash block and reflash the application block over UART, I2C, or SPI. The wide 2.0 V supply keeps the device alive during battery-backed firmware update cycles. The 40 MHz CPU runs typical small-packet bootloaders in well under 1 second. Pair with PIC18LF25K50-I/SP if USB bootloading is required, and use 25AA1024 for external configuration storage.
推荐
推荐产品汇总
工程参考数据： PIC18LF4220T-I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18F4220-I/PT | PIC18LF4320-I/PT | PIC18LF4420-I/PT | PIC18LF4520-I/PT | PIC18F4520-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Program Memory (Flash) | 4 KB | 4 KB | 8 KB (+100%) | 16 KB (+300%) | 32 KB (+700%) | 32 KB (+700%) |
| Data RAM | 512 B | 512 B | 512 B | 768 B | 1536 B | 1536 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Operating Supply Voltage | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (F) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (F) |
| Maximum Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Number of I/O | 36 | 36 | 36 | 36 | 36 | 36 |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
关键差异点
- Low-voltage (2.0 V) operation for battery-powered designs （对比 PIC18F4220-I/PT)
- Cost-optimized 4 KB Flash variant in the same TQFP-44 family （对比 PIC18LF4520-I/PT)
- nanoWatt technology with sub-100 nA Sleep current （对比 PIC18F46K22-I/PT)
- Parallel Slave Port (PSP) on PORTD for external bus interface （对比 PIC18LF26K22-I/SO)
设计说明
Estimated: at 40 MHz, 5 V, all peripherals on, the PIC18LF4220T-I/PT typically draws ~16 mA from VDD, plus ~5 mA for the ADC. Place a 100 nF X7R ceramic decoupling capacitor within 5 mm of each VDD/VSS pin pair (4 pairs total on TQFP-44). Use a bulk 10 µF tantalum or aluminum-polymer at the regulator output to handle in-rush when the ADC reference is enabled. The MCU has an internal 2.5V or 5V selectable bandgap reference; if the application draws heavy analog current from VREF+, add a 10 µF buffer cap to AVREF+.
Route the ICSP pins RB6/PGC and RB7/PGD to a 5-pin header with GND/VPP/VPP/PGD/PGC signals for in-system programming. Keep MCLR high via a 10 kΩ pull-up to VDD and add a 100 nF cap to ground for noise immunity; never leave MCLR floating. The TQFP-44 exposed thermal pad is a no-connect on this part - do not solder it to the ground plane (would alter thermal characteristics and may stress the package). Keep high-speed analog traces (AN0-AN7, VREF+/VREF-) short and shielded by analog ground.
Critical: Configuration bits must be set BEFORE the first instruction fetch. Failing to disable the watchdog timer for development boards locks the part on timeout unless the programmer can clear CONFIG3H. Common pitfalls: (1) selecting an oscillator mode that requires an external crystal without one on the board; (2) using the LF variant on a 3.3 V regulated supply that drops below 2.0 V under battery load - check brown-out settings; (3) running the ADC at 40 MHz with internal reference, which violates the 6 µs minimum acquisition time when sampling high-impedance sources - add wait states or buffer the input.
Recommended: when using the MSSP in SPI mode at 40 MHz (FOSC/4), the EUSART and ADC reference lines should be guarded by ground pours to prevent crosstalk. The PORTB interrupt-on-change feature is sensitive to high-frequency transitions on RB4-RB7; if not used, disable IOC for these bits to avoid spurious interrupts. For long I2C bus runs (>50 mm), add 4.7 kΩ pull-ups and place the PIC's MSSP as the only master, since the PIC18LF4220 has no SMBus voltage-level translation.
合规信息
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified - for automotive applications, choose PIC18F46K22-I/PT (AEC-Q100 Grade 1) or PIC18F67K22-I/PT (AEC-Q100 Grade 0). Halogen-free per Microchip 2015+ manufacturing transition. Conflict-mineral compliant per Microchip EICC-GeSI declaration.
