PIC18F24K20-I/ML - 8-Bit 64MHz 16KB Flash MCU | Microchip
MPN: PIC18F24K20-I/ML ✓ Hoạt độngPIC18F24K20-I/ML Tóm tắt
A PIC18 microcontroller is an 8-bit Harvard-architecture RISC MCU built around an enhanced PIC instruction set with up to 16 MIPS throughput. PIC MCUs sit in the broader hierarchy of embedded microcontrollers under 8-bit MCUs, microcontrollers, embedded processors, and finally semiconductors; the PIC18 K20 sub-family adds nanoWatt XLP technology and support for multiple sleep modes targeting battery-powered and energy-harvesting applications.
Key features include 25 digital I/O pins, two rail-to-rail analog comparators with programmable voltage reference, a 10-bit ADC with up to 14 channels, and three programmable external interrupts. The device supports two capture/compare/PWM modules, an EUSART with auto-baud detection, an MSSP (SPI/I2C) peripheral, and a programmable 16-level voltage reference, with two memory-access operating modes (MCU and extended microcontroller) for code-space access beyond 64KB.
The architecture combines a C-compiler-optimized RISC CPU with an optional extended instruction set, an 8x8 hardware multiplier, and a 31-level hardware stack for deterministic interrupt handling. The XLP nanoWatt features cut standby current to roughly 100 nA in Sleep mode and enable run-time current scaling, while the internal 1.2V fixed voltage reference and rail-to-rail analog comparators simplify sensor signal conditioning without external reference ICs.
Typical applications include battery-powered sensor nodes, IoT edge devices, consumer appliances, industrial controllers, automotive body and lighting subsystems, and USB/HID peripherals implemented via the MSSP or EUSART blocks. The wide 1.8V-5.5V supply range (K20 family limit) also enables direct Li-ion and 3.3V/5V system operation without an additional LDO.
When designing, validate oscillator selection against the chosen peripherals (HS, XT, LP, RC, INTIO) and ensure the AVDD/AVSS pair is bypassed with 0.1uF ceramic close to the pins. The 28-QFN package benefits from a central thermal pad that must be soldered to a copper pour for thermal and ground continuity.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC18F24K20-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 PIC18F24K20-I/ML (cùng hình factor và footprint) — khác nhau ở Package, ADC, Timers, I/O Pins, Core Architecture.
PIC18F25K20-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F26K20-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F23K20-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F24K40-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24J50-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24K50-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24K20-I/ML Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC18 RISC (Harvard) |
| Program Memory (Flash) | 16 KB |
| RAM | 768 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Clock | 64 MHz (16 MIPS) |
| Điện áp cung cấp | 4.2 V to 5.5 V (this part suffix) |
| I/O Pins | 25 |
| ADC | 10-bit, up to 14 channels |
| Analog Comparators | 2 (rail-to-rail, programmable VREF) |
| PWM / CCP Modules | 2 CCP |
| Communication | EUSART, MSSP (SPI/I2C) |
| Khoảng nhiệt độ hoạt động | -40C to +85C (industrial) |
| Hộp | 28-QFN (6x6 mm) with thermal pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Technology / Low-Power | nanoWatt XLP |
Cấu hình chân PIC18F24K20-I/ML
| Chân 1 | RA7/OSC1/CLKI — PORTA bit 7 / oscillator input |
| Chân 2 | RA6/OSC2/CLKO — PORTA bit 6 / oscillator output |
| Chân 3 | RA5/AN4/SS/HLVDIN — PORTA bit 5 / analog input 4 / SPI slave select / HLVD input |
| Chân 4 | RA4/AN3/T0KI — PORTA bit 4 / analog input 3 / Timer0 clock input |
| Chân 5 | RA3/AN2/VREF+ — PORTA bit 3 / analog input 2 / ADC VREF+ |
| Chân 6 | RA2/AN1/VREF- — PORTA bit 2 / analog input 1 / ADC VREF- |
| Chân 7 | RA1/AN0 — PORTA bit 1 / analog input 0 |
| Chân 8 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 9 | VSS1 — Ground |
| Chân 10 | VDD1 — Positive supply |
| Chân 11 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 12 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 13 | RB5/C1OUT — PORTB bit 5 / comparator 1 output |
| Chân 14 | RB4/AN11/C2OUT — PORTB bit 4 / analog input 11 / comparator 2 output |
| Chân 15 | RB3/CCP2 — PORTB bit 3 / Capture/Compare/PWM 2 |
| Chân 16 | RB2/INT2/AN8 — PORTB bit 2 / external interrupt 2 / analog input 8 |
| Chân 17 | RB1/INT1/AN10 — PORTB bit 1 / external interrupt 1 / analog input 10 |
| Chân 18 | RB0/INT0/CCP1 — PORTB bit 0 / external interrupt 0 / CCP1 |
| Chân 19 | RC7/RX/DT — PORTC bit 7 / EUSART receive / data |
| Chân 20 | RC6/TX/CK — PORTC bit 6 / EUSART transmit / clock |
| Chân 21 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 22 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 23 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 24 | RC2/AN13/CCP1 — PORTC bit 2 / analog input 13 / CCP1 |
| Chân 25 | RC1/AN12/CCP2 — PORTC bit 1 / analog input 12 / CCP2 |
| Chân 26 | RC0/AN11 — PORTC bit 0 / analog input 11 |
| Chân 27 | VSS2 — Ground |
| Chân 28 | VDD2 — Positive supply |
Ứng dụng tiêu biểu
PIC18F24K20-I/ML phù hợp cho 6 Áp dụngs: Battery-Powered Sensor Nodes, Industrial Control Systems, Consumer Appliance Controls, Automotive Body & Lighting Modules, USB HID Peripherals (via Upgrade), IoT Edge Devices & Smart Home Hubs.
Battery-Powered Sensor Nodes
The PIC18F24K20-I/ML's nanoWatt XLP technology drives Sleep current down to roughly 100 nA, making it ideal for battery-powered sensor nodes that wake periodically to read a sensor and transmit via EUSART or MSSP. The 16KB Flash accommodates local sensor-fusion logic and a wireless protocol stack, while the wide 1.8-5.5V K20 family supply range lets the same PCB run from a 3.3V coin cell or a regulated Li-ion rail. Per Microchip application note AN1265, the part's PMD module can disable unused peripherals during Sleep to extend battery life by 30-40% versus earlier PIC18 generations.
Được đề xuất
Industrial Control Systems
The PIC18F24K20-I/ML's 25 I/O pins and 64MHz/16 MIPS throughput fit PLC I/O expansion modules, HMI front ends, and small motor-control boards handling opto-isolated inputs and triac/relay drivers. Its dual rail-to-rail analog comparators and 14-channel 10-bit ADC process 4-20 mA sensor signals without external op-amps, reducing BOM cost in factory automation. The industrial -40C to +85C temperature grade per datasheet document 41303F supports deployment near motors and switchgear.
Được đề xuất
Consumer Appliance Controls
Consumer appliances such as coffee machines, microwave ovens, washing-machine control boards and air-conditioner remotes benefit from the PIC18F24K20-I/ML's combination of 16KB Flash, MSSP-controlled LCD or LED displays and EUSART-driven control-panel interfaces. The CCP PWM outputs drive small brushless DC fan motors directly from the MCU, while nanoWatt XLP sleep keeps standby power below EU eco-design requirements. The 28-QFN (6x6) package fits compact board layouts used in slim wall-mount remote controls.
Được đề xuất
Automotive Body & Lighting Modules
Within automotive body controllers, lighting modules and accessory interfaces, the PIC18F24K20-I/ML executes LIN-based communication via its EUSART and PWM-controlled LED drivers through its dual CCP modules, while staying within the -40C to +125C operating envelope (-E grade variant recommended for under-hood). The PIC18F2XK20 datasheet describes hardware PWM synchronization ideal for automotive LED turn-signal and ambient-light applications where deterministic timing matters.
Được đề xuất
USB HID Peripherals (via Upgrade)
When USB capability is needed but pin budget is critical, the PIC18F24K20-I/ML serves as a non-USB baseline while the pin-compatible PIC18F24J50-I/ML adds a USB 2.0 full-speed transceiver on the same 28-QFN footprint. Engineers who prototype on the K20 and then scale to USB skip PCB redesign entirely. The PIC18F24K50 family brings USB plus a 48MHz CPU clock in the same package, giving a smooth migration path.
Được đề xuất
IoT Edge Devices & Smart Home Hubs
IoT edge devices and smart-home controllers leverage the PIC18F24K20-I/ML's MSSP (SPI/I2C) interface to talk to sensors and EEPROM, while EUSART supports Wi-Fi or Sub-GHz modules such as the MRF24J40. The dual rail-to-rail analog comparators enable zero-cross detection on AC mains lines for solid-state relay control. Microchip's MPLAB X IDE and XC8 compiler shorten firmware development, and the part remains in production with 7+ year supply per Microchip longevity program commitments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F24K20-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 | PIC18F25K20-I/ML | PIC18F26K20-I/ML | PIC18F23K20-I/ML | PIC18F24K40-I/ML | PIC18F24J50-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6) | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same |
| Flash | 16 KB | 32 KB | 64 KB | 8 KB | 16 KB | 16 KB |
| Max Clock | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 48 MHz |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 |
| USB | No | No | No | No | Yes (CIP USB) | Yes (USB 2.0 FS) |
| Low-Power Tech | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | eXtreme Low Power | nanoWatt |
| Approx Unit Price (1pc) | $3.95 | $4.50 | $5.20 | $3.50 | $4.30 | $4.80 |
Bảo phân biệt quan trọng
- Lowest-cost 16KB member of PIC18 K20 family with same peripheral set (vsPIC18F25K20-I/ML)
- Direct upgrade path to 64KB Flash on same 28-QFN footprint (vsPIC18F26K20-I/ML)
- 16KB with USB 2.0 in same 28-QFN package via migration path (vsPIC18F24J50-I/ML)
Ghi chú thiết kế
The 28-QFN (6x6) package central thermal pad (pin 29) MUST be soldered to the PCB ground pour using an array of thermal vias. Estimated: at 64MHz / 5V / 25mA active current, power dissipation is roughly 125 mW; with no thermal pad the junction could rise 50C above ambient - degraded but acceptable for industrial -40C to +85C operation. For hot enclosures, route 4-6 thermal vias under the pad to an internal copper plane.
Place a 0.1uF X7R ceramic decoupling capacitor as close as possible to each VDD pin (pins 10 and 28), with a bulk 10uF tantalum or aluminum polymer near the MCU. Connect VSS pins (9 and 27) directly to the ground pour with short traces. For nanoWatt XLP Sleep current targets (~100 nA), avoid external pull-ups on MCLR and limit SDA/SCL pull-ups to 10k or larger so they do not dominate quiescent draw.
The 28-QFN (6x6 mm) recommended land pattern follows the IPC-7351 nominal profile with 0.30mm pads on a 0.50mm pitch. Stencil aperture for the central thermal pad should be split into a 3x3 array of 1.0mm squares to prevent solder starvation. Avoid routing analog traces (AN0-AN13, VREF+-) parallel to digital switching lines; if a crossing is unavoidable, place a ground trace between them to minimize coupling.
Do not confuse the PIC18F24K20-I/ML with the PIC18F24J50-I/ML footprint - both are 28-QFN but share the same pinout for digital I/O. Do not apply +5V to a -F (1.8-3.6V) K20 variant or you will destroy the part - always confirm voltage range before substitution. The ICSP pins (RB6/PGC, RB7/PGD) require 4.7k pull-downs during reset for reliable programming per datasheet document 41303F section 23.
Route the HS crystal traces (OSC1/OSC2) short, symmetric and surrounded by a ground guard ring to minimize EMI and noise injection into the PLL. If using the 4x PLL for 64MHz operation from a 16MHz crystal, ensure the crystal load capacitor values match the crystal's CL specification (typically 15-20pF total including stray capacitance). Avoid placing noisy switching regulators or PWM-driven FETs within 5mm of the crystal traces.
Thông tin tuân thủ
RoHS/REACH compliant per Microchip PIC18F2XK20/4XK20 product page. Not AEC-Q100 qualified - choose PIC18F25K20-E/ML or PIC18F26K20-E/ML (extended temp -40C to +125C) variants for automotive designs.
