PIC18LF24J50-I/SP - 8-bit USB MCU 16KB Flash 28-SPDIP | Microchip
料号： PIC18LF24J50-I/SP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.32 | $5.32 |
| 10 | $4.79 | $47.90 |
| 100 | $4.25 | $425.00 |
| 500 | $3.8 | $1,900.00 |
| 1,000 | $3.39 | $3,390.00 |
PIC18LF24J50-I/SP 概述
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, RAM, and configurable I/O peripherals. Within the broader taxonomy, the PIC18LF24J50-I/SP belongs to the 8-bit MCU category -> RISC microcontroller -> embedded controller -> semiconductor IC. The "LF" voltage class supports 2.0V-3.6V core operation natively while remaining 5.5V tolerant on digital I/O, bridging coin-cell and Li-ion battery designs with 5V-tolerant sensors and actuators without level translators. The "J" series designation refers to the enhanced peripheral set including the on-chip USB engine and deep-sleep XLP modes, while the "50" suffix denotes the USB 2.0 Full-Speed capable variant in the family.
Key features include hardware Real-Time Clock Calendar (RTCC) with timestamps, 2 KB EEPROM emulation in Flash, Master Synchronous Serial Port (MSSP) supporting SPI and I2C, two Enhanced USART modules, charge time measurement unit (CTMU) for capacitive touch and mA-range current measurement, and configurable logic cells. The device supports self-programming via ICSP (In-Circuit Serial Programming) and runs the same MPLAB X IDE / XC8 toolchain as every other PIC18 part, simplifying firmware reuse across product lines.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), CDC virtual COM ports, low-power sensor nodes, capacitive touch interfaces, battery-powered instrumentation, and industrial control nodes. The 5V-tolerant digital I/O makes the part directly compatible with 5V sensors without external level shifters. Trade-off consideration: at full 48 MHz the LF core requires the upper end of its 2.0V-3.6V rail, while deep-sleep operation preserves nanoamp quiescent current but disables USB - power profiles must be budgeted carefully for USB-suspended battery applications.
直接替换替代料： PIC18LF24J50-I/SP ——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： PIC18LF24J50-I/SP （相同外形与封装尺寸） ——差异在于 Core Architecture, Mounting Type, Operating Temperature, Package.
快速对比工具——选择替代料号进行并排对比：
PIC18F24J50-I/SP
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF25J50-I/SP
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF26J50-I/SP
✅ 直接替换✓ 有现货
$2.85 / 个
查看数据手册 →PIC18LF24J50-I/SS
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF14K50-I/SP
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF24J50-I/SP 最大额定值与电气特性
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 16 KB (8K x 16 words) |
| Data RAM | 4 KB |
| Maximum CPU Frequency | 48 MHz (12 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V (LF core); 5.5 V tolerant on digital I/O |
| USB Module | USB 2.0 Full-Speed (12 Mbps) with on-chip transceiver and internal pull-up |
| I/O Pins | 16 (with interrupt-on-change) |
| Communication Peripherals | MSSP (SPI/I2C), 2x Enhanced USART (EUSART) |
| RTCC (Real-Time Clock Calendar) | Yes, hardware with timestamp |
| CTMU | Charge Time Measurement Unit for capacitive touch / current measurement |
| 工作温度 | -40 C to +85 C (industrial) |
| 封装 | 28-pin SPDIP (Skinny Plastic DIP, through-hole) |
| 安装类型 | Through-Hole (THT) |
| Lead-Free / RoHS | Lead-free, RoHS compliant |
| Programming / Debug | ICSP (In-Circuit Serial Programming) via PGC/PGD; 2-wire ICD |
PIC18LF24J50-I/SP 引脚配置
| 引脚 1 | MCLR/RE3 — Master Clear (reset) input / RE3 digital-only I/O |
| 引脚 2 | RA0 — PORTA digital I/O / analog input |
| 引脚 3 | RA1 — PORTA digital I/O / analog input |
| 引脚 4 | RA2 — PORTA digital I/O / analog input |
| 引脚 5 | RA3 — PORTA digital I/O / analog input |
| 引脚 6 | RA4 — PORTA digital I/O (open-drain capable) |
| 引脚 7 | RA5 — PORTA digital I/O |
| 引脚 8 | VSS — Ground reference |
| 引脚 9 | RA7/OSC1 — PORTA digital I/O / external clock input |
| 引脚 10 | RA6/OSC2 — PORTA digital I/O / external clock output |
| 引脚 11 | RC0 — PORTC digital I/O |
| 引脚 12 | RC1 — PORTC digital I/O |
| 引脚 13 | RC2 — PORTC digital I/O |
| 引脚 14 | RC3 — PORTC digital I/O |
| 引脚 15 | RC4 — PORTC digital I/O / USB D- (peripheral) |
| 引脚 16 | RC5 — PORTC digital I/O / USB D+ (peripheral) |
| 引脚 17 | RC6 — PORTC digital I/O / EUSART TX |
| 引脚 18 | RC7 — PORTC digital I/O / EUSART RX |
| 引脚 19 | VSS — Ground reference |
| 引脚 20 | VDD — Positive supply (2.0V-3.6V) |
| 引脚 21 | RB0 — PORTB digital I/O / interrupt-on-change |
| 引脚 22 | RB1 — PORTB digital I/O / interrupt-on-change |
| 引脚 23 | RB2 — PORTB digital I/O / interrupt-on-change |
| 引脚 24 | RB3 — PORTB digital I/O / interrupt-on-change |
| 引脚 25 | RB4 — PORTB digital I/O / interrupt-on-change |
| 引脚 26 | RB5 — PORTB digital I/O / interrupt-on-change / PGM |
| 引脚 27 | RB6 — PORTB digital I/O / PGC (ICSP clock) |
| 引脚 28 | RB7 — PORTB digital I/O / PGD (ICSP data) |
典型应用
PIC18LF24J50-I/SP 适用于 6 应用s: USB HID Input Devices, USB CDC Virtual COM Port, Capacitive Touch User Interface, Battery-Powered Sensor Nodes, Industrial Control Nodes, Educational / Maker Development.
USB HID Input Devices
The PIC18LF24J50-I/SP is a strong match for USB HID peripherals (keyboards, mice, game controllers, custom input devices) because of its integrated USB 2.0 Full-Speed transceiver with on-chip 1.5 kohm pull-up, 16 KB Flash for the HID class stack, and 4 KB RAM for HID report buffers. According to the Microchip datasheet (DS39931B), the nanoWatt XLP deep-sleep mode keeps idle current under 100 nA, which is essential for battery-powered HID input devices. The 28-SPDIP package also fits through-hole prototype sockets commonly used for keyboard matrix scanning designs. Companion part: PIC18LF2550-I/SP for designs that may need to scale up.
推荐
USB CDC Virtual COM Port
The PIC18LF24J50-I/SP works well as a USB CDC device that emulates a serial COM port for firmware-update channels, debug logging, and point-to-point data links to a PC. Its 16 KB Flash accommodates the CDC class stack plus application code, while the 48 MHz core sustains 12 MIPS - sufficient for 115200 baud UART emulation over USB without flow-control gaps. The 5.5V-tolerant I/O pins let the part drive 5V RS-232 transceivers like the MAX232 from a 3.3V rail without level shifters. Trade-off: at full CPU load the LF core draws ~10 mA; for always-on low-duty-cycle bridges, prefer the deep-sleep mode.
推荐
Capacitive Touch User Interface
The PIC18LF24J50-I/SP supports capacitive touch sensing via its on-chip CTMU (Charge Time Measurement Unit), which measures capacitance to ground with sub-pF resolution - enough for buttons, sliders, and proximity sensors. The 5.5V-tolerant digital I/O can drive LED indicators directly, eliminating external drivers in many cases. Per the Microchip datasheet (DS39931B), the CTMU + 10-bit ADC combination provides sufficient dynamic range for moisture-compensated touch designs. Companion part: MCP23017 for designs that need more GPIO for additional LED feedback channels.
推荐
Battery-Powered Sensor Nodes
The PIC18LF24J50-I/SP is well suited to battery-powered wireless sensor node edge controllers thanks to its nanoWatt XLP deep-sleep mode (sub-100 nA) and 2.0V-3.6V VDD range that draws directly from a single Li-ion or 2xAA cell. The 10-bit ADC can read battery voltage, thermistor, or external sensor outputs at 250 ksps, while the MSSP peripheral can drive SPI or I2C sensors. The USB Full-Speed engine supports both battery charging and data exchange via the same connector - useful for rechargeable sensor node designs. Trade-off: USB suspend mode and deep-sleep wakeup need careful sequencing in firmware.
推荐
Industrial Control Nodes
The PIC18LF24J50-I/SP fits industrial control point nodes (sensor concentrators, low-channel I/O modules, USB-tethered HMI panels) thanks to its -40C to +85C industrial temperature range, hardware RTCC for timestamping events, and Enhanced USART modules for RS-485 links via transceivers like the MAX3485. The 16 KB Flash accommodates Modbus RTU slave stacks or vendor-specific protocols. Per the Microchip datasheet, the device's 5.5V-tolerant I/O allows direct interfacing with 5V industrial sensors without external protection. Companion part: MAX3485 for half-duplex RS-485.
推荐
Educational / Maker Development
The PIC18LF24J50-I/SP is popular for educational and maker projects because of its 28-SPDIP through-hole package, which fits breadboards and standard 28-pin DIP sockets used in microcontroller teaching labs. The PIC18 instruction set is well documented in Microchip's learning resources, and the MPLAB X IDE + XC8 compiler are free downloads. The integrated USB eliminates the need for external programmer hardware beyond the ICSP pins, allowing students to build USB-class projects on day one. Companion part: PICkit 3 or PICkit 4 for ICSP programming and in-circuit debugging.
推荐
推荐产品汇总
工程参考数据： PIC18LF24J50-I/SP ——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 | PIC18F24J50-I/SP | PIC18LF25J50-I/SP | PIC18LF26J50-I/SP | PIC18LF24J50-I/SS | PIC18LF14K50-I/SP |
|---|---|---|---|---|---|---|
| Package | 28-SPDIP (through-hole) | 28-SPDIP (through-hole) - same | 28-SPDIP (through-hole) - same | 28-SPDIP (through-hole) - same | 28-SSOP (surface-mount) - logical pin-to-pin, different land pattern | 20-SPDIP - smaller footprint, requires PCB rework |
| Brand | Microchip Technology | Microchip Technology (same-brand) | Microchip Technology (same-brand) | Microchip Technology (same-brand) | Microchip Technology (same-brand) | Microchip Technology (same-brand) |
| Flash Program Memory | 16 KB | 16 KB | 32 KB (+100%) | 64 KB (+300%) | 16 KB (same die) | 16 KB |
| Data RAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 768 B (-81%) |
| Maximum CPU Frequency | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) |
| Supply Voltage Range | 2.0V to 3.6V (5.5V-tolerant I/O) | 2.0V to 3.6V | 2.0V to 3.6V (5.5V-tolerant I/O) | 2.0V to 3.6V (5.5V-tolerant I/O) | 2.0V to 3.6V (5.5V-tolerant I/O) | 2.0V to 3.6V (5.5V-tolerant I/O) |
| USB Module | USB 2.0 Full-Speed, internal pull-up | USB 2.0 Full-Speed, internal pull-up | USB 2.0 Full-Speed, internal pull-up | USB 2.0 Full-Speed, internal pull-up | USB 2.0 Full-Speed, internal pull-up | USB 2.0 Full-Speed, internal pull-up |
| I/O Pin Count | 16 | 16 | 16 | 16 | 16 | 12 (-25%) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
关键差异点
- Integrated USB 2.0 Full-Speed transceiver with internal pull-up （对比 PIC18F4550-I/P (40-pin DIP))
- Low-voltage LF operation with 5.5V-tolerant I/O （对比 PIC18F24J50-I/SP)
- nanoWatt XLP deep-sleep mode at sub-100 nA quiescent current （对比 PIC18F24J50-I/SP)
- On-chip CTMU for capacitive touch and mA-range current sensing （对比 PIC18LF14K50-I/SP)
设计说明
Estimated: at 48 MHz active current is approximately 10 mA typical per the Microchip datasheet family curves; deep-sleep mode drops to under 100 nA. For battery-powered HID designs that spend most of their time idle, budget for an average draw under 1 mA by gating USB suspend transitions carefully. Add a 100 nF decoupling capacitor on every VDD/VSS pair, and a 4.7 uF bulk capacitor near the USB VBUS pin to suppress inrush during plug events.
When using the 28-SPDIP package, allow standard 0.1 inch (2.54 mm) DIP socket spacing so the part can be socketed for firmware development and swapped between prototypes. Keep the 48 MHz oscillator traces short - longer than about 5 mm of trace on OSC1/OSC2 can introduce EMI and clock jitter that destabilizes USB Full-Speed signaling. If you switch to the SSOP-28 variant for production, ensure the land pattern matches JEDEC SO-28 shrink-pitch geometry exactly.
USB D+ (RC5) and D- (RC4) traces must be routed as a 90-ohm differential pair with matched length, and kept clear of switching signals to maintain USB-IF compliance. Place the USB connector within 50 mm of the MCU to minimize EMI and reflection. Per the Microchip datasheet, internal pull-up on D+ is enabled by firmware - no external 1.5 kohm resistor is required, but a 10 kohm pull-down is sometimes added for host-side software-controlled attach/detach behavior.
Do not exceed 3.6V on the VDD pin of the LF variant - the I/O pins are 5.5V-tolerant but the core supply is not. Forgetting to disable the watchdog timer in firmware is a common lockout trap; either disable WDT in configuration bits or service it regularly. Also, the ICSP pins RB6/RB7 must be pulled or driven correctly during reset to enter programming mode; floating PGC/PGD lines can cause intermittent programming failures.
Estimated: the 48 MHz system clock generates harmonics that can couple into analog inputs through the MCU substrate. For precision ADC measurements, use the device's ADC acquisition delay and average multiple samples. If your design has both digital switching and analog signals on the same chip, consider using the dedicated analog VDD/VSS pins (where present) and routing them through ferrite beads to isolate analog supply noise from digital switching transients.
合规信息
Lead-free and RoHS-compliant per Microchip product page; AEC-Q100 not applicable - this is a general-purpose MCU, not an automotive-qualified part. Halogen-free status not stated in available data.
