PIC18F24K50-I/SP - 8-bit USB MCU, 16KB Flash, 28-SPDIP | Microchip
MPN: PIC18F24K50-I/SP ✓ Hoạt độngPIC18F24K50-I/SP Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip processor with an 8-bit data path, on-chip program and data memory, and a rich set of peripheral IPs (timers, ADC, communication ports, etc.). PIC18 microcontrollers sit at the top of Microchip's 8-bit family and use a Harvard architecture with a 16-bit instruction word and an 8-bit data path. The PIC18F24K50 is part of the PIC18F2X/45K50 USB Flash MCU sub-family, which adds an integrated USB 2.0 Full-Speed (12 Mbps) transceiver plus SIE and Active Clock Tuning (ACT) so no external USB crystal is required. Within the power-management hierarchy, the MCU belongs to the broader class of power-aware embedded controllers, alongside eXtreme Low Power (XLP) and low-power wide-voltage devices.
Key features include 16 KB Flash, 2 KB SRAM, 256 B EEPROM, 25 I/O pins, a 10-channel 10-bit ADC, two analog comparators, two 8-bit timers and three 16-bit timers, an Enhanced USART, two MSSP (SPI/I2C) ports, a CLC (Configurable Logic Cell), and a CTMU (Charge Time Measurement Unit). The internal 48 MHz oscillator with ACT keeps the USB clock within the 0.25% tolerance required by USB 2.0 without an external crystal, which is the device's single biggest cost-down enabler for USB peripherals.
The PIC18F24K50 is built on a 5-stage pipeline Harvard core with hardware multiply (8x8 in one cycle) and a single-cycle 8-bit ALU fed by a 16-bit instruction fetch path. The integrated USB SIE handles USB protocol framing in hardware, leaving the CPU free for application code, and the device's nanoWatt XLP technology delivers sleep currents as low as the manufacturer documents for the family. 28-SPDIP gives a robust through-hole option for hand-soldered prototypes and industrial control cards.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), USB-to-UART bridges, USB sensors, low-cost data loggers, and battery-powered portable instruments. The combination of integrated USB, large RAM for buffering, and XLP sleep currents also suits always-on IoT edge nodes that occasionally attach to a USB host for data sync. When designing with this part, ensure the VUSB 3.3 V LDO output is decoupled per datasheet and that the D+/D- traces are routed as a 90 ohm differential pair to preserve USB signal integrity.
Bộ thay thế dễ dàng lắp đặt cho PIC18F24K50-I/SP — 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/SP (cùng hình factor và footprint) — khác nhau ở ADC, Package, Timers, Program Memory (Flash), I/O Pins.
PIC18F25K50-I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F24K50-I/SP Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC18 Harvard, 8-bit data, 16-bit instruction |
| CPU Core | PIC18 with 8x8 hardware multiply |
| Program Memory (Flash) | 16 KB |
| Data SRAM | 2 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 48 MHz |
| Operating Voltage (Vdd) | 2.3 V to 5.5 V |
| USB Module | USB 2.0 Full-Speed (12 Mbps), integrated transceiver and SIE |
| Active Clock Tuning (ACT) | Yes, against USB host clock |
| I/O Pins | 25 |
| ADC | 10-bit, up to 14 channels (varies by package) |
| Comparators | 2 analog comparators |
| Timers | 2x 8-bit + 3x 16-bit (or equivalent per family datasheet) |
| Communication | Enhanced USART, 2x MSSP (SPI/I2C) |
| Hộp | 28-pin SPDIP (300 mil) |
| Operating Temperature (I grade) | -40 C to +85 C |
| Kiểu lắp đặt | Through-Hole (DIP) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F24K50-I/SP
| Chân 1 | RA2/AN2 — Digital I/O RA2; analog input AN2 |
| Chân 2 | RA3/AN3/Vref+ — Digital I/O RA3; analog input AN3; ADC Vref+ |
| Chân 3 | RA4/T0CKI/SOSCO — Digital I/O RA4; Timer0 clock input; SOSC oscillator output |
| Chân 4 | RA5/AN4/SOSCI — Digital I/O RA5; analog input AN4; SOSC oscillator input |
| Chân 5 | Vss — Ground |
| Chân 6 | RA7/OSC1/CLKI — Digital I/O RA7; crystal/clock input |
| Chân 7 | RA6/OSC2/CLKO — Digital I/O RA6; crystal/clock output |
| Chân 8 | RB0/AN12/INT0 — Digital I/O RB0; analog input AN12; external interrupt INT0 |
| Chân 9 | RB1/AN10/INT1 — Digital I/O RB1; analog input AN10; external interrupt INT1 |
| Chân 10 | RB2/AN8/INT2 — Digital I/O RB2; analog input AN8; external interrupt INT2 |
| Chân 11 | RB3/AN9/CCP2 — Digital I/O RB3; analog input AN9; CCP2 output |
| Chân 12 | RB4/AN11/KBI0 — Digital I/O RB4; analog input AN11; KBI interrupt 0 |
| Chân 13 | RB5/KBI1/PGM — Digital I/O RB5; KBI interrupt 1; LVP programming |
| Chân 14 | RB6/KBI2/PGC — Digital I/O RB6; KBI interrupt 2; ICSP clock |
| Chân 15 | RB7/KBI3/PGD — Digital I/O RB7; KBI interrupt 3; ICSP data |
| Chân 16 | Vdd — Positive supply (2.3 V to 5.5 V) |
| Chân 17 | RC0/SOSCO/SCLKI — Digital I/O RC0; SOSC output |
| Chân 18 | RC1/SOSCI/SCLKI — Digital I/O RC1; SOSC input |
| Chân 19 | RC2/AN14/CCP1 — Digital I/O RC2; analog input AN14; CCP1 output |
| Chân 20 | RC4/D- — Digital I/O RC4; USB D- data line |
| Chân 21 | RC5/D+ — Digital I/O RC5; USB D+ data line |
| Chân 22 | RC6/TX/CK — Digital I/O RC6; EUSART TX/CK |
| Chân 23 | RC7/RX/DT — Digital I/O RC7; EUSART RX/DT |
| Chân 24 | Vusb — Internal USB 3.3 V LDO output (decouple per datasheet) |
| Chân 25 | RC3/AN15/REFO — Digital I/O RC3; analog input AN15; reference output |
| Chân 26 | RA0/AN0/ULPWU — Digital I/O RA0; analog input AN0; ultra-low-power wake-up |
| Chân 27 | RA1/AN1 — Digital I/O RA1; analog input AN1 |
| Chân 28 | Vss — Ground |
Ứng dụng tiêu biểu
PIC18F24K50-I/SP phù hợp cho 6 Áp dụngs: USB HID Peripherals (Keyboards, Mice, Custom Input Devices), USB-to-UART Bridge / CDC Serial Adapter, USB Sensor / Data Logger Node, Battery-Powered Portable Instrument, USB Dongle for Industrial Control / Programming, Low-Cost Consumer Learning / Maker Board.
USB HID Peripherals (Keyboards, Mice, Custom Input Devices)
The PIC18F24K50-I/SP is purpose-built for USB HID devices. Its integrated USB 2.0 Full-Speed transceiver with Active Clock Tuning removes the external crystal normally required for USB compliance, while the 48 MHz PIC18 core supplies the 12 MIPS needed for HID report generation, debounce and LED scan matrices. With 2 KB of SRAM the part can host Microchip's MCHPFSUSB stack plus a 16 KB HID application that handles up to 8-byte HID reports comfortably, and XLP sleep currents below a microamp allow battery-free HID peripherals drawing the full 500 mA from the USB host port.
Được đề xuất
USB-to-UART Bridge / CDC Serial Adapter
The PIC18F24K50-I/SP works well as a USB-to-UART bridge when running the CDC class firmware in Microchip's USB stack. The Enhanced USART supports high baud rates with fractional baud-rate generator, and 2 KB of SRAM gives enough buffer for ring-buffered serial traffic at 115.2 kbps without overrun. Running at 48 MHz the core keeps latency under 1 ms per character at 1 Mbaud; the internal oscillator and ACT eliminate the USB crystal, allowing a two-layer PCB with no external clock components and a BOM below USD 3 in volume.
Được đề xuất
USB Sensor / Data Logger Node
For low-cost USB-attached sensor nodes and data loggers, the PIC18F24K50-I/SP combines 16 KB Flash for logging firmware, 2 KB SRAM for ring-buffer acquisition, and a 10-bit ADC with up to 14 input channels. XLP sleep currents in the nanoamp range let the part idle on battery power between sensor reads, and when plugged into USB the integrated transceiver enumerates and streams stored data without an external crystal. Industrial -40 C to +85 C temperature grade qualifies the part for factory-floor or outdoor sensor enclosures.
Được đề xuất
Battery-Powered Portable Instrument
The PIC18F24K50-I/SP supports 2.3 V to 5.5 V operation from a single lithium coin or two alkaline cells, while its nanoWatt XLP features deliver Sleep currents documented at sub-microamp levels for the family. Designers can run the ADC and comparators from the internal FVR without waking the CPU, then service USB attach events only when the user plugs into a host - ideal for handheld meters, BLE-USB bridges, and portable medical accessories. The 28-SPDIP package simplifies hand-soldered prototypes and field service replacements.
Được đề xuất
USB Dongle for Industrial Control / Programming
As a USB-attached dongle for firmware updates or industrial control bridges, the PIC18F24K50-I/SP exposes Enhanced USART, two MSSP SPI/I2C ports, plus CTMU for capacitive touch or time-of-flight sensing. The 25 I/O pins can be remapped to multiple communication channels, while ACT keeps the USB clock within 0.25% without a crystal so the dongle stays small and rugged. Its self-write Flash capability also enables field upgrade of the dongle's own firmware over USB.
Được đề xuất
Low-Cost Consumer Learning / Maker Board
The PIC18F24K50-I/SP appears on Microchip's Curiosity and Low-Pin-Count development boards because of its integrated USB and DIP form factor. Makers and students can plug the part straight into a breadboard, drag in MPLAB X IDE project examples, and have a USB device enumerating on a host PC within minutes. With 16 KB Flash and free Microchip code-configurators, the part is large enough for serious educational projects while remaining low-cost at roughly USD 4 per unit in single-piece quantities.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F24K50-I/SP — 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 | PIC18F25K50-I/SP | PIC18F24K50-I/SO | PIC18F24K50-I/ML | PIC18F45K50-I/SP | PIC18F24K40-I/ML |
|---|---|---|---|---|---|---|
| Package | 28-SPDIP (300 mil) | 28-SPDIP (300 mil) - same | 28-SOIC (surface-mount) | 28-QFN (surface-mount) | 40-SPDIP (600 mil) | 28-QFN (surface-mount) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 16 KB | 32 KB | 16 KB | 16 KB | 32 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB |
| Data EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Max CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 64 MHz |
| USB 2.0 Full-Speed Module | Yes (with Active Clock Tuning) | Yes (with ACT) | Yes (with ACT) | Yes (with ACT) | Yes (with ACT) | No USB |
| 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 | 2.3 V to 5.5 V |
| I/O Pins | 25 | 25 | 25 | 25 | 35 | 25 |
Bảo phân biệt quan trọng
- Integrated USB 2.0 Full-Speed with Active Clock Tuning eliminates the external USB crystal (vsPIC18F2550-I/SP)
- Drop-in 28-SPDIP migration path to 32 KB Flash without firmware changes (vsPIC18F25K50-I/SP)
- nanoWatt XLP technology for sub-uA Sleep currents (vsPIC18F24K40-I/ML)
Ghi chú thiết kế
Estimated: route D+ and D- from the PIC18F24K50-I/SP as a 90 ohm differential pair to the USB connector, keeping the pair matched within 150 mil length delta. Place the Vusb decoupling cap (4.7 uF or per datasheet) within 1-2 mm of the Vusb pin; a long trace here degrades USB eye margins even though the integrated SIE handles protocol. Add a ferrite bead or small resistor on VBUS if the design hot-plugs into a noisy host.
Estimated: a typical USB HID application built on the PIC18F24K50-I/SP idles at ~10 mA in Run mode at 48 MHz and falls to sub-uA levels in Sleep, per the family datasheet. To meet USB suspend requirements (500 uA maximum), firmware must drop CPU speed to LFINTOSC and disable unused peripherals within 3 ms of suspend signalling. Use the on-the-fly HFINTOSC to LFINTOSC switching feature to avoid re-locking a PLL on every wake event.
Do not assume the active clock tuning (ACT) is optional - if the firmware enables the USB module without ACT, the internal oscillator drifts outside USB's 0.25% tolerance and the host may fail to enumerate. Also, the PIC18F24K50-I/SP I/SP suffix denotes industrial temperature (-40 C to +85 C), not extended; use the E/SP suffix for -40 C to +125 C. Finally, the device has 16 KB Flash - any application above ~12 KB should migrate to the PIC18F25K50-I/SP sibling for headroom and bootloader support.
Thông tin tuân thủ
Per the Microchip product page, the PIC18F24K50-I/SP is supplied lead-free and RoHS compliant; the I/SP ordering code specifies industrial -40 C to +85 C. AEC-Q100 qualification is not available on this part - use the PIC18F18F45K50-E/SP if automotive AEC-Q100 Grade 0 is required.
