PIC18LF4553-I/ML - 8-bit 48MHz USB MCU 32KB Flash | Microchip
MPN: PIC18LF4553-I/ML ✓ نشطPIC18LF4553-I/ML نظرة عامة
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, and peripherals. PIC18 microcontrollers use Microchip's enhanced Harvard RISC architecture, achieving 200 ns instruction execution and up to 12 MIPS throughput. Within the broader semiconductor taxonomy, MCUs sit under microcontrollers -> processors -> semiconductors, and they form the lowest tier of computing devices for embedded systems where cost, deterministic timing, and peripheral integration matter more than raw compute throughput.
Key features include Full-Speed USB 2.0 device/host/OTG support with an internal 3.3V regulator, a 10-bit ADC pre-scaler, two CCP/ECCP modules for PWM and capture/compare, I2C, SPI, and an enhanced USART for serial communication. The device also provides nanoWatt Technology with multiple idle/sleep modes, a programmable brown-out reset (BOR), a hardware watchdog timer (WDT), and high/low-voltage detect (HLVD) for robust operation in industrial environments. The on-chip 32 KB self-programmable flash supports boot-loader and in-application programming via USB, simplifying field firmware updates.
Architecturally, the PIC18LF4553 uses an enhanced 16-bit instruction word with 8-bit data paths and a 31-level hardware stack, providing deterministic interrupt response essential for real-time USB stacks. The internal 3.3V regulator can supply the USB transceiver while the core runs from 5V, eliminating the need for external LDO when designing USB peripherals on 5V rails.
Typical applications include USB HID peripherals such as custom keyboards and mice, USB-to-UART bridges, industrial data loggers with USB connectivity, and low-power sensor nodes that occasionally wake up to enumerate as USB devices. Designers should add a 1uF bypass capacitor near the VUSB3V3 pin and follow Microchip's USB hardware checklist for EMI/ESD compliance when targeting industrial temperature grades.
بدائل مباشرة لـ PIC18LF4553-I/ML — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18LF4553-I/ML (نفس عامل الشكل والبصمة) — يختلف في Package, ADC, Program Memory (Flash), Operating Temperature, Timers.
PIC18F4553-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4550-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4550-I/ML
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF4455-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4458-I/ML
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF4553-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF4553-I/ML الحدود القصوى والخصائص الكهربائية
| Core Processor | PIC |
| Core Size | 8-Bit |
| Series | PIC 18F |
| Program Memory Size | 32 KB Flash |
| RAM Size | 2048 B |
| EEPROM Size | 256 B |
| Maximum Clock Speed | 48 MHz |
| Instruction Throughput | 12 MIPS |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| درجة حرارة التشغيل | -40 C to +85 C (Industrial) |
| العلبة | 44-VQFN Exposed Pad (ML) |
| نوع التركيب | Surface Mount |
| Connectivity | I2C, SPI, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, HLVD, POR, PWM, WDT |
| ADC Resolution | 12-bit, up to 13 channels |
| USB | USB 2.0 Full-Speed Device/Host/OTG with internal 3.3V regulator |
| حالة RoHS | Compliant |
| Lead-Free | Yes |
تكوين أطراف PIC18LF4553-I/ML
| دبوس 1 | RA2 — Port A bit 2 / analog channel AN2 |
| دبوس 2 | RA3 — Port A bit 3 / analog channel AN3 / VREF+ |
| دبوس 3 | RA4 — Port A bit 4 / analog channel AN4 |
| دبوس 4 | RA5 — Port A bit 5 / analog channel AN5 / HLVDIN |
| دبوس 5 | VSS — Ground reference |
| دبوس 6 | RA6 — Port A bit 6 / oscillator output |
| دبوس 7 | RA7 — Port A bit 7 / oscillator input |
| دبوس 8 | VDD — Positive supply voltage (2.0-5.5 V) |
| دبوس 9 | RE3 — Port E bit 3 / MCLR (programming/reset) |
| دبوس 10 | VUSB — USB power monitor / internal 3.3V regulator output |
| دبوس 11 | RB0 — Port B bit 0 / analog channel AN12 |
| دبوس 12 | RB1 — Port B bit 1 / analog channel AN10 |
| دبوس 13 | RB2 — Port B bit 2 / analog channel AN8 |
| دبوس 14 | RB3 — Port B bit 3 / analog channel AN9 / CCP2 |
| دبوس 15 | RB4 — Port B bit 4 / analog channel AN11 |
| دبوس 16 | RB5 — Port B bit 5 / analog channel AN13 |
| دبوس 17 | RB6 — Port B bit 6 / PGC (ICSP clock) |
| دبوس 18 | RB7 — Port B bit 7 / PGD (ICSP data) |
| دبوس 19 | VSS — Ground reference |
| دبوس 20 | VDD — Positive supply voltage (2.0-5.5 V) |
| دبوس 21 | RC0 — Port C bit 0 / analog channel AN4 |
| دبوس 22 | RC1 — Port C bit 1 / analog channel AN5 |
| دبوس 23 | RC2 — Port C bit 2 / analog channel AN6 / CCP1 |
| دبوس 24 | VDD — Positive supply voltage (USB transceiver internal) |
| دبوس 25 | VSS — Ground reference (USB transceiver) |
| دبوس 26 | RC4 — Port C bit 4 / D- (USB data minus) |
| دبوس 27 | RC5 — Port C bit 5 / D+ (USB data plus) |
| دبوس 28 | RC6 — Port C bit 6 / TX (USART async transmit) |
| دبوس 29 | RC7 — Port C bit 7 / RX (USART async receive) |
| دبوس 30 | RD0 — Port D bit 0 / PSP data |
| دبوس 31 | RD1 — Port D bit 1 / PSP data |
| دبوس 32 | RD2 — Port D bit 2 / PSP data |
| دبوس 33 | RD3 — Port D bit 3 / PSP data |
| دبوس 34 | RD4 — Port D bit 4 / PSP data |
| دبوس 35 | RD5 — Port D bit 5 / PSP data |
| دبوس 36 | RD6 — Port D bit 6 / PSP data |
| دبوس 37 | RD7 — Port D bit 7 / PSP data |
| دبوس 38 | VSS — Ground reference |
| دبوس 39 | VDD — Positive supply voltage (2.0-5.5 V) |
| دبوس 40 | RE0 — Port E bit 0 / analog channel AN5 |
| دبوس 41 | RE1 — Port E bit 1 / analog channel AN6 |
| دبوس 42 | RE2 — Port E bit 2 / analog channel AN7 |
| دبوس 43 | OSC1 — Oscillator input / external clock input |
| دبوس 44 | OSC2 — Oscillator output |
التطبيقات النموذجية
PIC18LF4553-I/ML مناسب لـ 6 التطبيقs: USB HID Peripherals (Keyboard / Mouse / Gamepad), USB-to-UART Bridge / Virtual COM Port, Industrial USB Data Logger, Battery-Powered USB Sensor Node, USB Host / OTG Embedded Controller, Educational USB Development Platform.
USB HID Peripherals (Keyboard / Mouse / Gamepad)
The PIC18LF4553-I/ML is purpose-designed for USB Human Interface Devices. Its Full-Speed USB 2.0 SIE plus internal 3.3V regulator eliminates the external LDO needed by most 5V MCUs, shrinking PCB area. With 32 KB flash and 12 MIPS, it runs Microchip's USB Framework HID class driver comfortably, including boot-loader-based field firmware updates. The 12-bit ADC and PWM peripherals support multi-channel analog inputs and RGB LED drive typical of premium gaming peripherals, while nanoWatt idle modes extend battery life in wireless HID dongles.
موصى به
USB-to-UART Bridge / Virtual COM Port
The PIC18LF4553-I/ML's integrated USB SIE and enhanced USART allow it to implement CDC-class virtual COM port bridges without an external converter IC. With 48 MHz CPU and 2048 B RAM, throughput easily exceeds the 12 Mbps USB Full-Speed envelope for typical serial rates up to 921600 bps. The wide 2.0-5.5 V supply lets the same firmware serve both 3.3V MCUs and legacy 5V RS-232 gear via level shifters. Industrial-grade -40C to +85C operation makes it suitable for factory-floor serial bridges.
موصى به
Industrial USB Data Logger
The 32 KB flash and 256 B EEPROM are sufficient for storing configuration and calibration tables in a USB-tethered industrial data logger. The 12-bit ADC with up to 13 channels digitizes multiple sensor inputs (temperature, pressure, 4-20 mA loops via shunt), while the 44-VQFN exposed pad dissipates heat during continuous USB-powered acquisition. Brown-out reset and HLVD guard against industrial supply glitches, and the -40C to +85C industrial temperature range supports factory environments. USB plug-and-play eliminates custom driver installation.
موصى به
Battery-Powered USB Sensor Node
The 'LF' prefix denotes the 2.0-5.5 V wide-voltage nanoWatt variant, allowing the PIC18LF4553-I/ML to run from a single Li-ion cell (3.0-4.2 V) while charging and still maintaining USB enumeration. nanoWatt idle modes drop quiescent current below 100 nA in sleep, and the internal 3.3V regulator powers the USB pull-up only when connected. The 48 MHz core wakes from sleep, runs sensor acquisition, and pushes data over USB CDC or HID within milliseconds, preserving battery life between measurement intervals.
موصى به
USB Host / OTG Embedded Controller
In USB host mode the PIC18LF4553-I/ML can interface to USB mass storage, HID, or CDC devices, enabling embedded products that read USB flash drives or interface to USB printers without a PC. The 32 KB flash holds a simplified USB host stack plus FAT file-system library from Microchip. With 2048 B RAM, small file-buffer operations are feasible; for full mass-storage support, designers typically use the 4553 as co-processor alongside a higher-RAM MCU. The wide VDD range supports bus-powered host hubs from 5V supply.
موصى به
Educational USB Development Platform
The PIC18LF4553-I/ML is a staple in university and hobbyist USB projects because Microchip's MPLAB X IDE, XC8 compiler, and USB Framework are free and well documented. With 32 KB flash it runs full HID, CDC, and bootloader examples, while the 44-VQFN breakout boards expose USB, ADC, PWM, and I/O pins for lab work. The 48 MHz core plus 12-bit ADC allows timing experiments and instrumentation projects at undergraduate level. The exposed thermal pad simplifies hand-soldering prototypes on standard breakout PCBs.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18LF4553-I/ML — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F4553-I/ML | PIC18LF4550-I/ML | PIC18F4550-I/ML | PIC18LF4455-I/ML | PIC18LF4553-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-VQFN Exposed Pad (ML) | 44-VQFN Exposed Pad (ML) - same | 44-VQFN Exposed Pad (ML) - same | 44-VQFN Exposed Pad (ML) - same | 44-VQFN Exposed Pad (ML) - same | 44-TQFP (PT) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Program Flash | 32 KB | 32 KB | 32 KB | 32 KB | 24 KB (-25%) | 32 KB |
| RAM | 2048 B | 2048 B | 2048 B | 2048 B | 2048 B | 2048 B |
| USB 2.0 FS | Yes (SIE + internal 3.3V) | Yes | Yes | Yes | Yes | Yes |
| ADC Resolution / Channels | 12-bit / 13 channels | 12-bit / 13 channels | 12-bit / 13 channels | 12-bit / 13 channels | 12-bit / 13 channels | 12-bit / 13 channels |
| Max Clock Speed | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
أبرز الفروقات
- Wide 2.0-5.5 V VDD range with nanoWatt low-power modes (مقابلPIC18F4553-I/ML)
- Integrated USB 2.0 Full-Speed with on-chip 3.3V regulator (مقابلPIC18LF4458-I/ML)
- Same silicon in QFP for easier prototyping and rework (مقابلPIC18LF4553-I/PT)
ملاحظات التصميم
Estimated: At 48 MHz CPU clock, VDD 5.0 V, full USB peripheral set active, the PIC18LF4553-I/ML draws approximately 25 mA core current. From a 5V/500 mA USB VBUS source the internal 3.3V regulator supplies the USB transceiver, leaving ample headroom for external sensors. When running from a 3.3V rail, disable the internal regulator and tie VUSB to VDD to avoid contention. Decouple each VDD/VSS pair with 100 nF X7R placed within 5 mm of the pins to suppress switching noise.
The 44-VQFN (ML) package has an exposed thermal pad that MUST be soldered to a copper pour on the PCB (at least 1 sq inch) and tied to VSS for both thermal dissipation and ground return. Route the USB D+/D- differential pair as an 90-ohm impedance-matched pair with length matching within 2 mm. Place the 12 MHz crystal within 5 mm of OSC1/OSC2 with short, symmetric traces and a guard ground on the far side to minimize EMI susceptibility.
Do not confuse the 'F' (4.2-5.5 V) and 'LF' (2.0-5.5 V) variants - firmware will not enumerate USB below 4.2 V on F parts. The VUSB pin is the internal 3.3V regulator output in self-powered mode; it requires a 220 nF to 1 uF decoupling capacitor and must NOT be used as a load driver. The MCLR pin (RE3) is input-only on the LF4553 family - do not drive it as an output. Finally, the ICSP pins RB6/RB7 must not be pulled low at reset if in-circuit debugging is desired.
For USB Full-Speed compliance, add a 1.5 kohm pull-up on D+ (or D- for low-speed) through a soft-disconnect FET controlled by firmware, and place 27-33 ohm series resistors close to the MCU pins on each data line. The internal 3.3V regulator's stability depends on its 220 nF ceramic output capacitor with ESR below 0.5 ohm; X5R/X7R dielectrics are recommended. For noise-sensitive analog channels, place the ADC reference decoupling (100 nF + 10 uF) within 3 mm of AVDD/AVSS pins.
معلومات الامتثال
RoHS and lead-free per Microchip product page; REACH compliance statement available on manufacturer documentation; AEC-Q100 not applicable for industrial-grade USB MCU.
