PIC18LF1220T-I/SS - 8-bit 40MHz MCU, 4KB Flash, SSOP-20 | Microchip
料号： PIC18LF1220T-I/SS ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.78 | $278.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC18LF1220T-I/SS 概述
A PIC18 microcontroller belongs to Microchip's 8-bit PIC (Peripheral Interface Controller) family, which is built on a RISC architecture (Reduced Instruction Set Computer). PIC18 devices are widely used in embedded systems where low power, deterministic interrupt response, and ease of programming matter more than raw CPU clock speed. Within the broader taxonomy, PIC18 sits between the smaller PIC10/12/16 baseline families and the 16-bit PIC24/dsPIC parts, occupying the mainstream 8-bit space for consumer, industrial, and automotive-grade designs.
Key features of the PIC18LF1220T-I/SS include nanoWatt Technology power-managed modes (drawing as little as 0.1 uA in standby), on-chip Flash program memory with ICSP (In-Circuit Serial Programming) for field upgrades, an enhanced instruction set with 200 ns instruction execution, and a wide 2.0 V to 5.5 V supply range that makes the device ideal for both 3.3 V and 5 V systems. The 'LF' prefix denotes the low-voltage Flash variant.
Architecturally, the PIC18LF1220 uses a Harvard architecture with separate program and data buses, allowing instruction fetch and data access in a single clock cycle. The device includes a 10-bit Analog-to-Digital Converter, multiple timers, PWM modules, and enhanced USART/I2C/SPI peripherals, all supported by Microchip's MPLAB XC8 toolchain.
Typical applications include battery-operated sensor nodes, low-power IoT edge devices, consumer white goods, industrial control modules, and automotive body electronics. The wide voltage range and sub-microamp standby also suit remote controls, energy harvesting front-ends, and wearable designs.
Designers should note that the 'T' suffix denotes Tape and Reel packaging, while 'I' indicates the industrial temperature range (-40 C to +85 C). Code compatibility across the PIC18LF1220 family simplifies migration to PIC18F1320 or PIC18LF1320 variants when more memory or I/O are required.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet alone, providing a one-stop reference for procurement and engineering teams.
直接替换替代料： PIC18LF1220T-I/SS ——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： PIC18LF1220T-I/SS （相同外形与封装尺寸） ——差异在于 Package, Program Memory (Flash), Operating Temperature, Mounting Type, ADC.
快速对比工具——选择替代料号进行并排对比：
PIC18F1220-I/SS
✅ 直接替换✓ 有现货
$2.18 / 个
查看数据手册 →PIC18LF1220-I/SS
✅ 直接替换✓ 有现货
$0.81 / 个
查看数据手册 →PIC18LF1320-I/SS
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF1220-I/SO
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF1220-I/P
✅ 直接替换✓ 有现货
$2.17 / 个
查看数据手册 →PIC18LF1220T-I/SO
✅ 直接替换✓ 有现货
$1.38 / 个
查看数据手册 →PIC18LF1220T-I/SS 最大额定值与电气特性
| Core | PIC 8-bit RISC (Harvard architecture) |
| Series | PIC18 LF |
| Program Memory Size | 4 KB (2K x 16) Flash |
| RAM Size | 256 B |
| CPU Speed | 40 MHz (10 MIPS) |
| Instruction Execution | 200 ns |
| 电源电压 | 2.0 V to 5.5 V |
| Number of I/O | 16 |
| ADC | 10-bit |
| 封装 / 外壳 | 20-SSOP (0.209 inch, 5.30 mm) |
| 工作温度 | -40 C to +85 C (Industrial) |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Power Management | nanoWalt Technology, 0.1 uA standby |
| RoHS 状态 | Compliant |
PIC18LF1220T-I/SS 引脚配置
| 引脚 1 | MCLR/VPP/RA5 — Master Clear / Programming voltage / I/O port A5 |
| 引脚 2 | RA0/AN0 — I/O port A0 / Analog input 0 |
| 引脚 3 | RA1/AN1 — I/O port A1 / Analog input 1 |
| 引脚 4 | RA2/AN2/VREF- — I/O port A2 / Analog input 2 / ADC VREF- |
| 引脚 5 | RA3/AN3/VREF+ — I/O port A3 / Analog input 3 / ADC VREF+ |
| 引脚 6 | RA4/T0CKI — I/O port A4 / Timer0 clock input |
| 引脚 7 | VSS — Ground reference |
| 引脚 8 | OSC1/CLKIN/RA7 — Oscillator crystal input / External clock / I/O port A7 |
| 引脚 9 | OSC2/CLKOUT/RA6 — Oscillator crystal output / Clock output / I/O port A6 |
| 引脚 10 | RC0/T1OSO/T1CKI — I/O port C0 / Timer1 oscillator output / Timer1 clock input |
| 引脚 11 | RC1/T1OSI/CCP2 — I/O port C1 / Timer1 oscillator input / CCP2 output |
| 引脚 12 | RC2/CCP1 — I/O port C2 / CCP1 output |
| 引脚 13 | RC3 — I/O port C3 |
| 引脚 14 | RC4 — I/O port C4 |
| 引脚 15 | RC5 — I/O port C5 |
| 引脚 16 | RC6 — I/O port C6 |
| 引脚 17 | RC7 — I/O port C7 |
| 引脚 18 | RB0/INT0 — I/O port B0 / External interrupt 0 |
| 引脚 19 | VSS — Ground reference (secondary) |
| 引脚 20 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
典型应用
PIC18LF1220T-I/SS 适用于 6 应用s: Battery-Operated IoT Sensor Nodes, Consumer White Goods and Appliance Control, Automotive Body Electronics, Industrial Control and PLC I/O Modules, Remote Controls and RF Transmitters, Wearable Health and Fitness Devices.
Battery-Operated IoT Sensor Nodes
The PIC18LF1220T-I/SS is purpose-built for battery-operated IoT sensor nodes. Its 2.0 V to 5.5 V supply range supports 2x AA alkaline, single-cell Li-ion, or coin-cell chemistries without boost converters. nanoWalt Technology standby draws as little as 0.1 uA, so a 2400 mAh AA pair can power a wake-measure-transmit node for years. The 40 MHz MIPS core allows complex sensor fusion in active mode before returning to sleep. Connect the MCU directly to a 3.3 V Li-ion rail with no level shifting needed.
推荐
Consumer White Goods and Appliance Control
The PIC18LF1220T-I/SS is widely deployed in consumer white goods such as washing machines, dishwashers, microwave ovens, and induction cooktops. Its 16 I/O pins directly drive relays, triacs, and seven-segment displays without external logic, and the 10-bit ADC reads thermistor and current-sense signals. The wide 2.0-5.5 V supply tolerates rectified mains-derived rails after regulation. Compared to PIC18F1220, the LF variant supports low-voltage standby modes that meet EU energy-efficiency regulations.
推荐
Automotive Body Electronics
Automotive body electronics modules including door locks, mirror controllers, and seat memory modules use the PIC18LF1220T-I/SS as a cost-effective sub-MCU for slave nodes. The industrial -40 C to +85 C temperature range covers most cabin environments. CAN/LIN connectivity is implemented through external transceivers, and the 4 KB Flash holds the door-lock sequencing and debounce logic. AEC-Q100 qualification would require the automotive-grade PIC18F1220-I/SS variant instead.
推荐
Industrial Control and PLC I/O Modules
In industrial control systems, the PIC18LF1220T-I/SS serves as a dedicated I/O processor for PLC discrete I/O modules reading 24 V field signals. The 5 V-tolerant I/O connects directly to optocoupler-isolated digital inputs, and the PWM outputs drive solid-state relays. The 16 I/O pins can be mapped to 8 inputs + 8 outputs for a single PLC channel card. The wide supply range handles 24 V industrial bus systems after on-board regulation.
推荐
Remote Controls and RF Transmitters
The PIC18LF1220T-I/SS is a natural fit for remote controls and RF transmitter key fobs because of its nanoWalt standby that can run for years on a coin cell. The 10-bit ADC reads potentiometers for analog controls, while 16 I/O scan the button matrix without external decoders. Combined with an ASK/FSK transmitter like the MICRF112, it forms a complete low-cost wireless remote. Unlike 32-bit MCUs, the 8-bit PIC starts code execution in microseconds for instant button response.
推荐
Wearable Health and Fitness Devices
Wearable fitness bands and heart-rate monitors use the PIC18LF1220T-I/SS as a low-power co-processor for sensor aggregation. Its 0.1 uA standby allows always-on step counting while the main SoC sleeps, and the 10-bit ADC digitizes PPG (photoplethysmography) signals from pulse oximeters. The 2.0-3.6 V supply range suits small Li-Po batteries without a boost converter. Code compatibility with the PIC18 family allows reuse of firmware libraries across product tiers.
推荐
推荐产品汇总
工程参考数据： PIC18LF1220T-I/SS ——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 | PIC18F1220-I/SS | PIC18LF1220-I/SS | PIC18LF1320-I/SS | PIC18LF1220-I/SO | PIC18LF1220-I/P |
|---|---|---|---|---|---|---|
| Package | 20-SSOP (5.30 mm body) | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SOIC (7.5 mm body) - different footprint | 20-PDIP through-hole - different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Supply Voltage | 2.0 V to 5.5 V | 4.2 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 |
| Program Flash | 4 KB (2K x 16) | 4 KB (2K x 16) | 4 KB (2K x 16) | 8 KB (4K x 16) | 4 KB (2K x 16) | 4 KB (2K x 16) |
| RAM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Number of I/O | 16 | 16 | 16 | 24 | 16 | 16 |
| CPU Speed | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| ADC | 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
- Wide 2.0 V to 5.5 V supply range vs standard 4.2 V to 5.5 V F-variant （对比 PIC18F1220-I/SS)
- nanoWalt Technology standby at 0.1 uA typical （对比 PIC18LF1320-I/SS)
- Tape and reel packaging for high-volume SMT assembly （对比 PIC18LF1220-I/SS)
设计说明
The PIC18LF1220T-I/SS supports six nanoWalt power-managed modes (Run, Idle, Sleep, Deep Sleep, Watchdog Timer Disable, and Brown-out Reset Disable). Estimated: at 3.3 V with the CPU in Sleep and peripherals disabled, total current drops to approximately 0.1 uA per the Microchip datasheet DS39605. For battery-powered designs, configure the WDT as a wake source with a typical 4 ms timeout and use the internal 31 kHz LFINTOSC for timekeeping during Sleep to avoid keeping the 40 MHz primary oscillator running.
The SSOP-20 package has 0.65 mm pitch and requires careful PCB layout. Place a 0.1 uF decoupling capacitor within 3 mm of the VDD pin (pin 20) to suppress switching noise. Connect both VSS pins (7 and 19) to a single ground plane with multiple vias to reduce ground bounce. The SSOP thermal pad is not present on this package, so for moderate power dissipation rely on copper pours on signal traces, not a dedicated thermal pad.
The PIC18F1220 (non-LF) variant operates only from 4.2 V to 5.5 V, so substituting the LF part is necessary for 3.3 V or 2-cell battery designs. The MCLR pin (pin 1) must be tied to VDD through a 10 kohm resistor to prevent spurious resets, and a 100 nF cap on MCLR is recommended when ICSP programming is used. Configuration bits must be set correctly for the oscillator (HS, XT, or INTOSC) and the watchdog timer, or the device may appear non-functional on first power-up.
Keep the crystal oscillator traces (OSC1/OSC2, pins 8/9) as short as possible (under 5 mm) and shield them with ground pours on both sides of the PCB. If using the internal 8 MHz INTOSC, leave the OSC1/OSC2 pins available for GPIO (RA7/RA6) to save board space. Route analog input traces (AN0-AN3) away from PWM and digital switching lines to prevent ADC cross-talk; the datasheet recommends a 100 nF bypass on the VREF+ pin if used as ADC reference.
合规信息
RoHS and REACH compliant per Microchip product page. Industrial temperature grade (-40 C to +85 C). Not AEC-Q100 qualified - use PIC18F1220T-I/SS automotive variant for vehicle applications.
