PIC18F24K50-I/ML - 8-bit 48MHz 16KB Flash USB MCU | Microchip
MPN: PIC18F24K50-I/ML ✓ Hoạt độngPIC18F24K50-I/ML Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash/ROM), volatile data memory (RAM), and peripherals onto one die. Within the PIC family, PIC18 devices occupy the high-performance 8-bit tier, sitting above baseline PIC10/PIC12/PIC16 parts and below 16-bit dsPIC and 32-bit SAM/ARM Cortex-M families. The PIC18F24K50 specifically targets USB-enabled embedded designs where low active current, USB device/host/on-the-go flexibility, and small PCB footprint are required.
Key features include a full-speed USB 2.0 transceiver (12 Mbps, device/host/OTG-capable depending on firmware), two USART modules, two MSSP (SPI/I2C) modules, a 10-bit ADC with up to 14 channels, two 10-bit PWM modules with capture/compare, a charge time measurement unit (CTMU) for capacitive touch, and a wide 2.3V-5.5V operating voltage range suitable for both 3.3V and 5V systems. The on-chip 3.3V regulator can supply the internal USB transceiver from a 5V VBUS rail.
The PIC18F24K50 uses an enhanced Harvard architecture with 16-bit instructions and 8-bit data path, plus a hardware multiplier for fast arithmetic. The XLP nanoWatt technology delivers typical sleep currents below 1 uA and active currents of a few mA, enabling years of operation from a single CR2032 cell when USB is dormant.
Typical applications include USB HID peripherals such as keyboards/mice/joysticks, USB-to-UART bridge dongles, USB CDC virtual COM ports, low-power data loggers with USB charging, capacitive-touch user interfaces, sensor nodes with USB diagnostics, and consumer medical dongles. The QFN-28 (6x6 mm) package also makes the part attractive in space-constrained wearables.
When designing with this MCU, ensure the USB D+/D- traces are 90 ohm differential, length-matched, and routed over a continuous ground plane. Place the VUSB bypass capacitor as close as possible to the VUSB pin to meet USB inrush-current specifications during host enumeration.
This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18F24K50-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 PIC18F24K50-I/ML (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Timers, Program Memory (Flash).
PIC18F24K50T-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24K50-E/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F24K40-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24K40T-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24K40-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F25K50-I/ML
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F24K50-I/ML Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (8-bit Harvard) |
| Program Memory (Flash) | 16 KB (8K x 16 instructions) |
| SRAM | 2048 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 48 MHz |
| Instruction Throughput | 12 MIPS |
| Operating Voltage Range | 2.3 V to 5.5 V |
| USB Module | USB 2.0 Full-Speed (12 Mbps), device/host/OTG |
| I/O Pins | 25 (max) |
| ADC | 10-bit, up to 14 channels |
| PWM Channels | 2 x 10-bit CCP/ECCP |
| Communication Interfaces | 2x USART, 2x MSSP (SPI/I2C) |
| Timers | 4 x 8/16-bit |
| CTMU (Capacitive Touch) | Yes |
| Internal 3.3V Regulator | Yes (for USB transceiver from 5V VBUS) |
| nanoWatt XLP Sleep Current | < 1 uA typical |
| Hộp | QFN-28 (ML) 6x6 mm with exposed pad |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F24K50-I/ML
| Chân 1 | VDD — Positive supply voltage |
| Chân 2 | RA5 — Digital I/O / analog input AN4 |
| Chân 3 | RA4 — Digital I/O / analog input AN3 |
| Chân 4 | RA3 — Digital I/O / analog input AN2 / VREF+ |
| Chân 5 | RC5 — Digital I/O / CCP1 / PWM |
| Chân 6 | RC4 — Digital I/O / D- |
| Chân 7 | RC3 — Digital I/O / analog input AN7 |
| Chân 8 | RC6 — Digital I/O / TX1 / CK1 |
| Chân 9 | RC7 — Digital I/O / RX1 / DT1 |
| Chân 10 | RB7 — Digital I/O / PGD |
| Chân 11 | RB6 — Digital I/O / PGC |
| Chân 12 | VSS — Ground reference |
| Chân 13 | VUSB — Internal 3.3V USB regulator output |
| Chân 14 | D+ — USB D+ data line |
| Chân 15 | D- — USB D- data line |
| Chân 16 | RC0 — Digital I/O / analog input AN4 |
| Chân 17 | RC1 — Digital I/O / analog input AN5 |
| Chân 18 | RC2 — Digital I/O / analog input AN6 / CCP1 |
| Chân 19 | VSS — Ground reference (thermal pad) |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RB0 — Digital I/O / analog input AN12 / INT0 |
| Chân 22 | RB1 — Digital I/O / analog input AN10 / INT1 |
| Chân 23 | RB2 — Digital I/O / analog input AN8 |
| Chân 24 | RB3 — Digital I/O / analog input AN9 / CCP2 |
| Chân 25 | RB4 — Digital I/O / analog input AN11 |
| Chân 26 | RB5 — Digital I/O / analog input AN13 |
| Chân 27 | RA0 — Digital I/O / analog input AN0 |
| Chân 28 | RA1 — Digital I/O / analog input AN1 |
Ứng dụng tiêu biểu
PIC18F24K50-I/ML phù hợp cho 6 Áp dụngs: USB HID Peripheral (Keyboard/Mouse/Joystick), USB-to-UART (CDC) Bridge Dongle, Low-Power Data Logger with USB Charging, Capacitive-Touch User Interface, Sensor Node with USB Diagnostics, Consumer Medical Dongle.
USB HID Peripheral (Keyboard/Mouse/Joystick)
The PIC18F24K50-I/ML is ideally suited to USB Human Interface Device class peripherals thanks to its on-chip full-speed USB 2.0 transceiver (12 Mbps) and 16 KB of Flash that comfortably fits a HID class stack plus scan-matrix logic. With 25 available I/O pins, designers can drive a 5x8 keyboard matrix directly, while the two MSSP peripherals handle SPI/I2C extensions for NKRO or RGB control. The internal 3.3V regulator powers the USB transceiver from a 5V VBUS rail, removing the need for an external LDO and reducing BOM cost in space-constrained keyboard PCBs.
Được đề xuất
USB-to-UART (CDC) Bridge Dongle
The PIC18F24K50-I/ML acts as a CDC virtual COM-port bridge, replacing discrete USB-UART ICs like the FT232R with a single programmable MCU. Its two USART modules support simultaneous host-side data plus a debug AUX port, and the 2 KB SRAM is sufficient for high-speed bulk transfers up to the USB full-speed ceiling. The QFN-28 (ML) 6x6 mm footprint allows the dongle PCB to fit inside USB-A enclosures. Active currents of a few mA keep the dongle within USB suspend-current budgets (< 2.5 mA) when the host sleeps.
Được đề xuất
Low-Power Data Logger with USB Charging
For battery-powered data loggers that recharge or offload data over USB, the PIC18F24K50-I/ML's nanoWatt XLP sleep current below 1 uA extends coin-cell life to multi-year horizons. The 256-byte EEPROM retains configuration and calibration without wearing Flash, while the 10-bit ADC with up to 14 channels reads sensor arrays directly. The USB port handles both charging and high-speed log download without a separate charger IC, with the internal regulator supplying the USB transceiver from a 5V VBUS source.
Được đề xuất
Capacitive-Touch User Interface
The PIC18F24K50-I/ML integrates Microchip's CTMU (Charge Time Measurement Unit) which, paired with mTouch firmware, builds robust capacitive-touch buttons, sliders, and proximity sensors without external touch ICs. Combined with the USB port for firmware updates and diagnostics, designers can build sealed touch panels for industrial controls, white goods, or medical handhelds. The QFN-28 (ML) 6x6 mm footprint supports dense PCB layouts where every square millimeter matters.
Được đề xuất
Sensor Node with USB Diagnostics
Industrial sensor nodes that need a USB port for configuration, log dump, and field firmware updates benefit from the PIC18F24K50-I/ML's combination of 14 ADC channels, two I2C/SPI ports, and USB device stack. The wide 2.3V to 5.5V supply range accepts direct connection to industrial 24V-to-5V rails through a simple LDO, while the -40C to +85C industrial temperature rating covers outdoor enclosures. EEPROM stores calibration constants that survive firmware updates.
Được đề xuất
Consumer Medical Dongle
Wearable medical accessories such as USB pedometers, pulse-oximeter dongles, and hearing-aid programmers use the PIC18F24K50-I/ML to combine low-power sensor readout, capacitive-touch buttons, and USB data sync in one chip. The QFN-28 (ML) 6x6 mm package fits inside lanyard-form-factor enclosures, while the XLP sleep current below 1 uA preserves battery life between USB charging cycles. The internal 3.3V regulator eliminates an external LDO on the 5V VBUS rail.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F24K50-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 | PIC18F24K50T-I/ML | PIC18F24K50-E/ML | PIC18F24K40-I/ML | PIC18F25K50-I/ML |
|---|---|---|---|---|---|
| Package | QFN-28 (ML) 6x6 mm | QFN-28 (ML) 6x6 mm | QFN-28 (ML) 6x6 mm | QFN-28 (ML) 6x6 mm | QFN-28 (ML) 6x6 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Max Frequency | PIC18 / 48 MHz | PIC18 / 48 MHz | PIC18 / 48 MHz | PIC18 / 48 MHz | PIC18 / 48 MHz |
| Flash / SRAM / EEPROM | 16 KB / 2 KB / 256 B | 16 KB / 2 KB / 256 B | 16 KB / 2 KB / 256 B | 16 KB / 2 KB / 256 B | 32 KB / 2 KB / 256 B |
| USB 2.0 Transceiver | Yes (FS device/host/OTG) | Yes (FS device/host/OTG) | Yes (FS device/host/OTG) | No | Yes (FS device/host/OTG) |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C |
| Param Match Percentage | 100% | 100% | 95% | 90% | 90% |
Bảo phân biệt quan trọng
- Integrated USB 2.0 full-speed transceiver eliminates external USB chip (vsPIC18F24K40-I/ML)
- Extended -40C to +125C temperature option for harsh environments (vsPIC18F24K50-I/ML (industrial grade))
- Drop-in upgrade to doubled Flash memory on same footprint (vsPIC18F25K50-I/ML)
Ghi chú thiết kế
Route USB D+ and D- as a 90 ohm differential pair, length-matched within 150 mil, over a continuous ground plane. Place the VUSB bypass capacitor (4.7 uF X7R) within 100 mil of the VUSB pin to meet USB inrush-current specifications. The QFN-28 (ML) 6x6 mm package has an exposed thermal pad that MUST be soldered to a ground copper pour with at least 8 thermal vias for thermal dissipation and ground-return integrity.
Estimated: With VDD = 5.0V, USB active mode draws ~14 mA at full-speed enumeration and ~6 mA in IDLE, while XLP sleep is below 1 uA. For battery-only designs, use the nanoWatt XLP Sleep mode (instruction-based wake-up on RTC or watchdog) rather than Idle to maximize coin-cell life. The internal 3.3V regulator can source up to 3 mA for the USB transceiver and one external pull-up - do not load it beyond this without an external LDO.
Common pitfalls: (1) Forgetting to configure CONFIG1L for HSPLL when running the 48 MHz USB clock from a 20 MHz crystal - the MCU cannot enumerate USB without HSPLL enabled. (2) Failing to enable the CTMU in Peripheral Enable bits when using mTouch capacitive sensing. (3) Mixing ICSP pins (RB6/RB7) with the application matrix without isolating them during debug - use the LVP bit and isolation resistors. (4) Not programming the CONFIG1H CLKOUTEN bit to OFF on pin RA6 if RA6 is wired to external logic, otherwise the clock output collides.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Standard industrial -40C to +85C grade is not AEC-Q100 qualified; automotive designs should evaluate the PIC18F24K50-E/ML (extended temp) or dedicated AEC-Q100 PIC18 variants.
