PIC18F24J50T-I/SS - 48MHz 8-bit USB MCU 16KB Flash | Microchip
MPN： PIC18F24J50T-I/SS ✓ 啟用中PIC18F24J50T-I/SS 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. The PIC18 family uses Microchip's 8-bit RISC Harvard architecture with a 16-bit instruction word, delivering deterministic execution and low interrupt latency. The XLP (eXtreme Low Power) designation means nanoWatt sleep currents below 100 nA in Deep Sleep, making the PIC18F24J50 suitable for battery-powered or USB bus-powered designs where idle current matters.
Key differentiating features include on-chip full-speed USB 2.0 (12 Mbps) with on-board transceiver, 25 digital I/O pins, 10-channel 10-bit ADC, two comparators, two capture/compare/PWM modules, and configurable logic cells. The Deep Sleep mode drops quiescent current to under 100 nA while retaining RAM and limited peripheral wake-up sources, an order of magnitude better than older PIC18 families.
Architecturally, the PIC18F24J50 uses a modified Harvard core with a hardware multiply, 31-level stack, and peripheral pin select via PPS - typical for the J-series. The on-chip 48 MHz internal oscillator eliminates the need for an external crystal in many designs, though USB operation typically requires the precision internal oscillator to be tuned or a crystal to be attached to the primary oscillator pins.
Typical applications include USB peripherals (HID, CDC, MIDI, custom class), low-power sensor nodes, USB-to-UART bridges, and consumer electronics with USB charging or data interfaces. The part is also used in industrial control boards where SSOP is preferred over QFN for hand-soldering and rework.
When designing with this device, note that the USB D+/D- lines require careful PCB layout - 90 ohm differential impedance, short traces, and a common-mode choke for EMI compliance. The 3.3V rail must be capable of supplying 100 mA peak during USB packet transmission to avoid Vbus droop.
This page synthesizes distributor pricing, drop-in alternatives across the PIC18 family, and practical USB design notes not found in the standalone datasheet.
直接替換替代品，適用於 PIC18F24J50T-I/SS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18F24J50T-I/SS （相同外形與佔位） — 差異在於 Family, Package, ADC, Operating Temperature, Program Memory (Flash).
PIC18F24J50-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC18F24J11-I/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F24J10-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC18F23K22-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC18F24J50T-I/SS 最大額定值與電氣特性
| Family | PIC18 XLP 18J |
| Core | 8-bit PIC18 RISC |
| Maximum Clock Speed | 48 MHz |
| Program Memory | 16 KB (8K x 16) Flash |
| RAM | 3.8 KB |
| Supply Voltage (VDD) | 2.15 V to 3.6 V |
| I/O Pins | 25 |
| ADC | 10 channels x 10-bit |
| Comparators | 2 |
| CCP/ECCP Modules | 2 CCP (1 with ECCP) |
| USB | USB 2.0 Full-Speed (12 Mbps) with on-chip transceiver |
| Timers | 4 (Timer0/1/2/3) |
| 封裝 | 28-SSOP (5.30 mm body, 0.65 mm pitch) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (Industrial) |
| Packaging | Tape & Reel (T-suffix) |
| RoHS 狀態 | ROHS3 Compliant |
| Lead-Free | Yes |
PIC18F24J50T-I/SS 腳位配置
| 腳位 1 | RA0/AN0/CVREF — Digital I/O / analog input / comparator reference |
| 腳位 2 | RA1/AN1 — Digital I/O / analog input |
| 腳位 3 | RA2/AN2/VREF- — Digital I/O / analog input / ADC VREF- |
| 腳位 4 | RA3/AN3/VREF+ — Digital I/O / analog input / ADC VREF+ |
| 腳位 5 | RA4/AN4 — Digital I/O / analog input |
| 腳位 6 | RA5/AN5 — Digital I/O / analog input |
| 腳位 7 | RA6/OSC2/CLKO — Digital I/O / oscillator output |
| 腳位 8 | RA7/OSC1/CLKI — Digital I/O / oscillator input |
| 腳位 9 | VSS — Ground reference |
| 腳位 10 | VDD — Positive supply (2.15-3.6 V) |
| 腳位 11 | RB0/AN12/INT0 — Digital I/O / analog input / external interrupt |
| 腳位 12 | RB1/AN10/INT1 — Digital I/O / analog input / external interrupt |
| 腳位 13 | RB2/AN8 — Digital I/O / analog input |
| 腳位 14 | RB3/AN9 — Digital I/O / analog input |
| 腳位 15 | RB4/AN11 — Digital I/O / analog input |
| 腳位 16 | RB5/CCP5/AN13 — Digital I/O / CCP / analog input |
| 腳位 17 | RB6/PGC — Digital I/O / ICSP clock |
| 腳位 18 | RB7/PGD — Digital I/O / ICSP data |
| 腳位 19 | VUSB — USB internal voltage regulator output (3.3 V) |
| 腳位 20 | D- — USB D- data line |
| 腳位 21 | D+ — USB D+ data line |
| 腳位 22 | RC4/D- — Digital I/O / alternate USB D- |
| 腳位 23 | RC5/D+ — Digital I/O / alternate USB D+ |
| 腳位 24 | RC6 — Digital I/O |
| 腳位 25 | RC7 — Digital I/O |
| 腳位 26 | RC0 — Digital I/O |
| 腳位 27 | RC1 — Digital I/O |
| 腳位 28 | RC2 — Digital I/O |
典型應用
PIC18F24J50T-I/SS 適用於 6 應用s: USB HID Peripheral (Mouse/Keyboard/Custom), USB-to-UART Bridge (CDC Virtual COM Port), USB MIDI Controller Interface, Low-Power USB Sensor Node, USB Mass Storage / Custom Class Device, Industrial USB Data Acquisition Front-End.
USB HID Peripheral (Mouse/Keyboard/Custom)
The PIC18F24J50T-I/SS is purpose-built for USB HID class peripherals thanks to its integrated full-speed USB 2.0 transceiver and SIE, eliminating external PHY hardware. With 48 MHz operation and 16 KB Flash, the MCU can run Microchip's USB stack plus a full HID report descriptor and application logic within a single chip. The 25 available I/O pins support a 8x8 keyboard matrix or multi-button mouse with leftover pins for LEDs, scroll wheels, and indicators. Deep Sleep mode below 100 nA suits battery-powered wireless HID dongles that wake on interrupt.
推薦
USB-to-UART Bridge (CDC Virtual COM Port)
Using the on-chip USB hardware and Microchip's CDC class firmware, the PIC18F24J50T-I/SS implements a USB-to-serial bridge without any external USB-to-UART IC like FTDI or CP2102. The 48 MHz core supports 1 Mbaud+ UART throughput reliably, while the 10-bit ADC and 25 I/O let designers add GPIO and analog sensing alongside the bridge function. The 2.15-3.6 V VDD matches typical 3.3 V logic directly, simplifying integration with target MCUs and sensors in industrial debug and field-update applications.
推薦
USB MIDI Controller Interface
The PIC18F24J50T-I/SS USB hardware and 48 MHz performance make it a strong fit for USB MIDI controllers, where bulk transfers carry note-on/off and control-change messages. The 3.8 KB RAM can buffer several MIDI streams and the 16 KB Flash stores USB-MIDI class descriptors plus button/encoder scanning logic. Hardware PWM outputs and the ECCP module simplify LED dimming and motorized fader control, while the SSOP package is friendly to hand-soldered prototype boards used in small-batch synth and controller production.
推薦
Low-Power USB Sensor Node
The PIC18F24J50T-I/SS XLP Deep Sleep mode below 100 nA and integrated USB give sensor nodes the rare combination of long battery life and easy host-side data retrieval. A temperature/humidity or motion sensor can be polled periodically via RTC interrupt, samples stored in the 3.8 KB RAM, then pushed to a host over USB when docked. The 10-bit ADC with 10 channels supports direct analog sensor input, and the 28-SSOP package is small enough for wearable or field-deployed enclosures.
推薦
USB Mass Storage / Custom Class Device
For designs requiring custom USB protocols, the PIC18F24J50T-I/SS provides the bulk transfer engine and 16 KB Flash to implement vendor-specific class firmware. The MCU can act as a small data logger presenting as a mass storage device, a vendor-class diagnostic tool, or a custom audio-class device. With 48 MHz headroom and 25 I/O, designers can attach SD cards, SPI flash, and peripherals while still servicing the USB endpoint engine without missing packets.
推薦
Industrial USB Data Acquisition Front-End
Industrial USB data acquisition boards benefit from the PIC18F24J50T-I/SS's combination of full-speed USB, 10-bit 10-channel ADC, 25 I/O, and -40C to +85C industrial temperature rating. The wide 2.15-3.6 V VDD range tolerates industrial 24 V rails after buck conversion. Deep Sleep mode lets the unit idle below 100 nA between acquisition bursts, while the SSOP package simplifies field-serviceable designs where hand rework is preferred over QFN reflow.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F24J50T-I/SS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F24J50-I/SS | PIC18F24J11-I/SS | PIC18F24J10-I/SS | PIC18F23K22-I/SS | PIC18F14K50-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 20-SSOP - DIFFERENT (pin mismatch) |
| Core / Max Clock | PIC18 8-bit / 48 MHz | PIC18 8-bit / 48 MHz | PIC18 8-bit / 48 MHz | PIC18 8-bit / 40 MHz | PIC18 K-series / 64 MHz | PIC18 K-series / 48 MHz |
| Flash / RAM | 16 KB / 3.8 KB | 16 KB / 3.8 KB | 16 KB / 3.8 KB | 16 KB / 3.8 KB | 8 KB / 512 B | 16 KB / 768 B |
| USB Hardware | USB 2.0 FS integrated | USB 2.0 FS integrated | No USB | No USB | No USB | USB 2.0 FS integrated |
| Supply Voltage | 2.15 V to 3.6 V | 2.15 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 1.8 V to 5.5 V | 2.7 V to 5.5 V |
| I/O Pins | 25 | 25 | 25 | 25 | 24 | 15 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
主要差異化特點
- Integrated full-speed USB 2.0 transceiver eliminates external PHY (對比PIC18F24J11-I/SS)
- Higher clock speed than legacy PIC18F2455/2450 family (對比PIC18F2455-I/SO)
- XLP nanoWatt technology vs K-series higher MIPS (對比PIC18F23K22-I/SS)
設計說明
USB D+ and D- traces on the PIC18F24J50T-I/SS must be routed as a 90 ohm differential pair with length matching within 2 mm. Place the USB connector within 25 mm of the MCU to minimize EMI and signal-integrity issues. A common-mode choke on D+/D- improves ESD and radiated emissions for FCC/CE compliance. Keep digital switching traces away from the USB pair and avoid routing D+/D- over power-plane splits.
The on-chip USB voltage regulator (VUSB pin) requires a 220 nF decoupling capacitor to ground and supplies the internal USB transceiver. For self-powered designs, tie VUSB to VDD through a 10 kohm resistor. Bulk-decouple VDD with 100 nF + 4.7 uF ceramic caps placed within 5 mm of pins 10 and 28 to handle USB packet current spikes up to 50 mA.
Estimated: configuring the internal 48 MHz PLL without enabling the correct clock source will leave USB enumeration failing intermittently. The USB module needs the 48 MHz +/- 0.25% reference clock; either use a 12 MHz or 48 MHz crystal on OSC1/OSC2, or enable the 8 MHz INTOSC with active clock tuning. Also note that Deep Sleep current spec (<100 nA) assumes all peripherals are off and MCLR is pulled high.
The PIC18F24J50T-I/SS in 28-SSOP has thermal resistance theta_JA around 80 C/W on a standard 2-layer board. At maximum 48 MHz operation with all peripherals active, current draw is approximately 25 mA from 3.3 V = 82 mW, well within thermal limits. No heatsink is required; however, in enclosed industrial enclosures above 60C ambient, derate clock speed to 32 MHz to keep junction temperature below 100C.
合規資訊
ROHS3 compliant per Microchip USA distributor page. Not AEC-Q100 qualified - not recommended for automotive safety-critical applications. Lead-free and halogen-free per Microchip material declaration.
