PIC18F1220T-I/SO - 8-Bit 40MHz 4KB Flash MCU 18-SOIC | Microchip
料号： PIC18F1220T-I/SO ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.2 | $22.00 |
| 100 | $1.95 | $195.00 |
| 500 | $1.74 | $870.00 |
| 1,000 | $1.54 | $1,540.00 |
PIC18F1220T-I/SO 概述
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data memory, and integrated peripherals such as timers, communication interfaces, and ADCs. The 8-bit category groups MCUs whose internal datapath is 8 bits wide; PIC18F devices extend the 8-bit PIC line with enhanced 16-bit instruction words, hardware multiplier, and a linear program memory map, positioning them between classic baseline PIC and 16-bit dsPIC families. They sit within the broader embedded MCU hierarchy: 8-bit MCU -> microcontroller -> semiconductor -> integrated circuit.
Key differentiating features of the PIC18F1220 include 4 KB self-programmable flash, 256 bytes SRAM, 16 I/O lines multiplexed with peripheral functions, 10-bit ADC, capture/compare/PWM modules, enhanced USART, and nanoWatt Technology with six software-controlled power-managed modes. These features reduce bill-of-materials cost by integrating analog, timing, and serial functions on-chip, eliminating external ADC or driver ICs in simple control loops.
The PIC18F1220T-I/SO uses a modified Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and operand access. The enhanced 16-bit instruction set supports hardware multiply, bit manipulation, and direct register addressing, delivering approximately 10 MIPS at 40 MHz. Self-programmable flash allows in-application updates without external programmers, and the nanoWatt sleep modes enable battery-friendly standby operation.
Typical applications include consumer appliance control, low-cost sensor signal conditioning, USB-to-UART bridges (with external transceiver), battery-powered instruments, white-goods user interfaces, and industrial monitoring nodes. The combination of nanoWatt low power and an integrated 10-bit ADC makes the device especially attractive for periodic-sampling sensor applications such as temperature, humidity, or simple process-variable readouts.
When designing with this part, allocate at least two I/O lines for ICSP (PGD/PGC) plus a dedicated MCLR reset line, even in production firmware, to allow in-circuit firmware updates. Use decoupling of 100 nF plus 10 µF close to VDD, and place the ICSP connector so production programming does not require board removal.
This page synthesizes distributor pricing, drop-in same-package alternatives drawn from the Site MPN list and verified web data, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： PIC18F1220T-I/SO ——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： PIC18F1220T-I/SO （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, ADC, Mounting Type, Capture/Compare/PWM.
快速对比工具——选择替代料号进行并排对比：
PIC18F1220-I/SO
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F1220-I/SS
✅ 直接替换✓ 有现货
$2.18 / 个
查看数据手册 →PIC18F1220T-I/ML
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.74 / 个
查看数据手册 →PIC18F1220-I/ML
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.85 / 个
查看数据手册 →PIC18F1220T-E/SO
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F1220-E/SO
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18F1220T-I/SO 最大额定值与电气特性
| Series | PIC 18F |
| Core | 8-bit PIC18 enhanced Harvard |
| Core Size | 8-bit |
| Program Memory | 4 KB (2K x 16) Flash |
| SRAM | 256 bytes |
| 最大时钟频率 | 40 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Supply Voltage (Verified Distributor Spec) | 4.2 V to 5.5 V |
| I/O Pins | 16 |
| ADC | 10-bit |
| 工作温度 | -40 °C to +85 °C |
| 封装 | 18-SOIC (SO) |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Power-Saving Technology | nanoWatt Technology, standby current as low as 0.1 µA |
| Programming | ICSP (In-Circuit Serial Programming) |
| Lifecycle Stage | ACTIVE |
| RoHS | Compliant |
PIC18F1220T-I/SO 引脚配置
| 引脚 1 | RA0/AN0 — Port A bit 0 / analog input 0 |
| 引脚 2 | RA1/AN1 — Port A bit 1 / analog input 1 |
| 引脚 3 | RA2/AN2 — Port A bit 2 / analog input 2 |
| 引脚 4 | RA3/AN3/VREF+ — Port A bit 3 / analog input 3 / ADC VREF+ |
| 引脚 5 | RA4 — Port A bit 4 (open-drain) |
| 引脚 6 | RA5/AN4 — Port A bit 5 / analog input 4 |
| 引脚 7 | VSS — Ground reference |
| 引脚 8 | OSC1 — Crystal/oscillator input |
| 引脚 9 | OSC2 — Crystal/oscillator output |
| 引脚 10 | RB0/INT — Port B bit 0 / external interrupt |
| 引脚 11 | RB1 — Port B bit 1 |
| 引脚 12 | RB2 — Port B bit 2 |
| 引脚 13 | RB3 — Port B bit 3 |
| 引脚 14 | RB4 — Port B bit 4 |
| 引脚 15 | RB5 — Port B bit 5 |
| 引脚 16 | RB6/PGC — Port B bit 6 / ICSP clock |
| 引脚 17 | RB7/PGD — Port B bit 7 / ICSP data |
| 引脚 18 | VDD — Positive supply |
典型应用
PIC18F1220T-I/SO 适用于 6 应用s: Consumer Appliance Control, Battery-Powered Sensor Nodes, White-Goods User Interface Boards, Industrial Monitoring and Control, USB-to-UART Bridge (with External PHY), Educational and Development Boards.
Consumer Appliance Control
The PIC18F1220T-I/SO fits consumer appliance control boards such as washing machines, microwave ovens, and rice cookers because of its 40 MHz PIC18 core, 4 KB flash, and 16 digital I/O lines. Its 10-bit ADC reads thermistor or weight-sensor inputs, while the enhanced USART connects to the main control panel or a Bluetooth bridge MCU. The 2.0-5.5 V operating window tolerates unregulated 5 V rails, and the 18-SOIC footprint fits small keypad-driven boards. nanoWatt Technology with 0.1 µA standby minimizes standby power in compliance with Energy Star requirements. Compared with discrete 8051 designs, the PIC18F1220 lowers BOM cost by integrating ADC, timers, and PWM. Pair it with a capacitive-touch front-end MCU for full keypad control.
推荐
Battery-Powered Sensor Nodes
For battery-powered wireless sensor nodes such as HVAC thermostats, leak detectors, or remote temperature loggers, the PIC18F1220T-I/SO offers six nanoWatt sleep modes with standby current as low as 0.1 µA, multi-year coin-cell operation, and a 10-bit ADC for direct thermistor or photocell reading. The 40 MHz core wakes, samples, transmits via USART to an external radio, and returns to sleep, achieving < 1 % average CPU duty cycle. Its 2.0-5.5 V range accepts a 3 V CR2032 directly, eliminating the boost converter. The 18-SOIC is reflow-compatible with the small 18 mm² boards typical of coin-cell designs. Combine with a sub-GHz or BLE module for the radio half and an MCP1700 LDO for noise isolation.
推荐
White-Goods User Interface Boards
The PIC18F1220T-I/SO is a strong fit for white-goods user-interface boards that drive 7-segment LED displays, keypads, and rotary encoders in refrigerators, dishwashers, and air-conditioner indoor units. Its 16 I/O lines handle 7-segment digit strobe, key-scan matrix, and a PWM-driven buzzer without external logic, while the 10-bit ADC reads NTC temperature sensors placed inside the unit. The 4 KB flash accommodates state-machine firmware with diagnostic logging. The 18-SOIC industrial-temperature rating supports under-cabinet and outdoor mounting. Its low 0.1 µA standby allows the front-panel MCU to remain powered from the appliance main rail without a separate always-on supply, simplifying the SMPS.
推荐
Industrial Monitoring and Control
For industrial monitoring modules such as 4-20 mA loop-powered transmitters, simple PLC expansion slices, and conveyor controllers, the PIC18F1220T-I/SO delivers the right balance of 10-bit ADC accuracy, enhanced USART for Modbus RTU, and 16 I/O lines for relay and opto-isolated inputs. Its 2.0-5.5 V range supports battery-backed or 24 V loop-supply operation when paired with a switching regulator. The 18-SOIC package withstands the conformal coating and reflow profiles required in industrial assembly. nanoWatt Technology enables sleep modes during inter-scan intervals, reducing average loop current. Choose the PIC18F1320T-I/SO for the same board when firmware growth demands 8 KB of flash and 22 I/O pins.
推荐
USB-to-UART Bridge (with External PHY)
The PIC18F1220T-I/SO can serve as a low-cost USB-to-UART bridge when paired with a USB-transceiver IC, providing a CDC-class firmware stack in its 4 KB flash with the enhanced USART driving RS-232, RS-485, or LIN slave peripherals. At 40 MHz the core handles USB polling and bulk-transfer protocol with headroom, while nanoWatt Technology delivers < 50 µA suspend current to comply with USB 2.0 suspend-current limits. The 18-SOIC footprint lets the bridge drop onto a 10 mm × 12 mm daughter card. Use the E (extended) temperature grade for industrial host ports and the standard I grade for consumer cables and dongles.
推荐
Educational and Development Boards
The PIC18F1220T-I/SO is a popular target for educational PIC18 development boards and hobbyist projects because of its 40 MHz enhanced core, ICSP support, MPLAB X IDE compatibility, and a forgiving 2.0-5.5 V supply that works from a single USB port or 9 V battery. The 18-SOIC is hand-solderable with a fine-tip iron for student labs, and the 4 KB flash hosts full Microchip application-library examples such as ADC, PWM, and USART demos. Pair it with an MCP1700 LDO and a 32.768 kHz crystal for RTC-style timing exercises. Migrate to the PIC18F1320T-I/SO when students graduate to larger projects requiring 8 KB flash and more I/O.
推荐
推荐产品汇总
工程参考数据： PIC18F1220T-I/SO ——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/SO | PIC18F1220-I/SS | PIC18F1220T-E/SO | PIC18F1220-E/SO | PIC18F1220-I/ML |
|---|---|---|---|---|---|---|
| Package | 18-SOIC (SO) | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | QFN-28 - same die, different footprint |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory | 4 KB Flash | 4 KB Flash | 4 KB Flash | 4 KB Flash | 4 KB Flash | 4 KB Flash |
| SRAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Voltage Range | 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 | 2.0 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C (industrial) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +125 °C (extended) | -40 °C to +125 °C (extended) | -40 °C to +85 °C |
| Packaging Form | Tape & Reel | Tray | Tray | Tape & Reel | Tray | Tray |
| Lifecycle Stage | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE |
关键差异点
- Tape-and-reel packaging for high-volume SMT assembly （对比 PIC18F1220-I/SO)
- Same-die flexibility across package options （对比 PIC18F1220T-E/SO)
- Lowest-cost 8-bit MCU in 18-SOIC from Microchip （对比 PIC18F1320T-I/SO)
设计说明
Place a 100 nF decoupling capacitor within 5 mm of the VDD pin and a 10 µF bulk capacitor near the supply origin. The PIC18F1220 datasheet recommends keeping OSC1/OSC2 traces short and symmetric to avoid clock jitter above 25 MHz. For battery-powered designs, route VDD via a ferrite bead to attenuate digital switching noise from entering the analog ADC reference. Estimated: decoupling placement assumes a 2-layer 1.6 mm FR4 board.
Always allocate two I/O lines (RB6/PGC and RB7/PGD) plus a dedicated MCLR reset line for ICSP, even in production firmware. Microchip recommends adding a 10 kΩ pull-up on MCLR to avoid spurious resets on noisy industrial rails. Forgetting the ICSP lines forces board removal for firmware updates, which is the single most common PIC18F1220 design pitfall according to Microchip application note TB087.
Use nanoWatt Technology sleep modes aggressively: switch the CPU off between ADC samples and wake on timer or interrupt. According to the Microchip datasheet, the 0.1 µA standby current assumes Sleep mode with WDT off; enabling WDT adds ~1.5 µA. For Li-coin-cell designs, disable all unused peripherals via firmware to avoid hidden bias currents and verify quiescent current with a source-measure unit before sealing the enclosure.
合规信息
RoHS compliance per Microchip product page; not AEC-Q100 qualified (use PIC18F1220T-E/SO for automotive-grade applications requiring higher temperature range).