PIC18F45K50T-I/MV - 8-Bit 48MHz USB MCU 32KB Flash UQFN-40
MPN: PIC18F45K50T-I/MV ✓ Hoạt độngPIC18F45K50T-I/MV Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer integrating a CPU, RAM, non-volatile program and data memory, and peripherals. Within the broader taxonomy, the PIC18F45K50 family sits at 8-bit PIC -> PIC18 microcontrollers -> Microcontroller -> Microprocessor and logic -> semiconductor. The 8-bit PIC18 RISC core executes most instructions in a single 200 ns cycle (at 48 MHz internal clock), giving up to 16 MIPS, which is sufficient for USB CDC/HID, sensor conditioning, and small protocol stacks. The XLP feature set allows standby currents in the nanoamp range, making the family a logical choice when battery life dominates the BOM.
Key features include 32 KB (16K x 16) self read/write flash, 2 KB data SRAM, 256 bytes EEPROM, 35 digital I/O, USB 2.0 full-speed with on-chip transceiver, internal 48 MHz oscillator with Active Clock Tuning from the USB host, 10-bit ADC up to 25 channels, two comparators, enhanced CCP with PWM, multiple communication peripherals (UART, SPI, I2C), and an operating voltage range of 2.5 V to 5.5 V (F-version, F25-F50 series). The UQFN-40 (MV) 5x5 mm package with exposed thermal pad reduces PCB area versus TQFP-44 while maintaining pin functionality for the standard PIC18F4x family pinout.
The architecture leverages Microchip's enhanced mid-range core with hardware multiply, a 16-bit instruction word, and a single 32-level hardware stack. Active Clock Tuning trims the internal 48 MHz oscillator against the USB host 1 kHz SOF reference, eliminating the need for an external crystal in USB designs and improving BOM cost and EMI. The on-chip USB 2.0 transceiver supports CDC, HID, MSD and proprietary classes, while XLP adds deep sleep, RTC, and power-managed peripherals for sleep currents below 100 nA typical.
Typical applications include USB-to-UART bridges, USB HID/HMI devices such as custom keyboards and mice, USB sensor dongles, low-power data loggers, learning platforms (the K50 is widely used in Microchip's low-pin-count USB dev kits), home automation nodes, and industrial sensor interfaces with USB diagnostics. The wide 2.5 V to 5.5 V range also supports lithium-ion battery packs and 5 V industrial buses.
Designers should note that the 'T' suffix denotes Tape & Reel packaging, the 'I' is the industrial -40 C to +85 C temperature grade, and 'MV' indicates the UQFN-40 5x5 package. When migrating from the PIC18F4550, configuration bit locations and a few register names differ; refer to Microchip's migration document for software changes.
This page synthesizes distributor pricing, drop-in same-family alternatives in the same UQFN-40 package, and practical design notes not found in the manufacturer datasheet, with all parameters traceable to Microchip documentation and current distributor listings as of 2026-09-28.
Bộ thay thế dễ dàng lắp đặt cho PIC18F45K50T-I/MV — 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 PIC18F45K50T-I/MV (cùng hình factor và footprint) — khác nhau ở Timers, Package, ADC, Operating Temperature, Maximum CPU Frequency.
PIC18F45K50-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F45K42-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F45K22-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF45K50T-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F45K42T-I/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F44K22-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F45K50T-I/MV Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC18 RISC |
| Tần số xung maksimum | 48 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 Bytes |
| Supply Voltage Range | 2.5 V to 5.5 V |
| I/O Pins | 35 |
| USB Module | USB 2.0 Full-Speed with on-chip transceiver |
| Internal Oscillator | 48 MHz with Active Clock Tuning (ACT) |
| ADC | 10-bit, up to 25 channels |
| Comparators | 2 |
| Enhanced CCP / PWM | Yes (PWM + Capture + Compare) |
| Timers | Timer0/1/2/3 + RTCC + WDT |
| Communication | UART, SPI, I2C, USB |
| Hardware Multiply | 8x8 single-cycle |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, 'I') |
| Hộp | 40-pin UQFN (MV) 5x5 mm with EP |
| Packaging Form | Tape & Reel ('T' suffix) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F45K50T-I/MV
| Chân 1 | RB7/ICSPDAT — Digital I/O RB7 / ICSP data line |
| Chân 2 | RB6/ICSPCLK — Digital I/O RB6 / ICSP clock line |
| Chân 3 | RB5 — Digital I/O RB5 |
| Chân 4 | RB4 — Digital I/O RB4 |
| Chân 5 | RB3 — Digital I/O RB3 |
| Chân 6 | RB2 — Digital I/O RB2 |
| Chân 7 | RB1 — Digital I/O RB1 |
| Chân 8 | RB0 — Digital I/O RB0 |
| Chân 9 | VUSB3V3 — Internal USB 3.3V regulator output (decoupling) |
| Chân 10 | D- — USB D- line |
| Chân 11 | D+ — USB D+ line |
| Chân 12 | VDD — Positive supply voltage (2.5V-5.5V) |
| Chân 13 | VSS — Ground reference |
| Chân 14 | RA7/OSC1/CLKI — Digital I/O RA7 / oscillator input |
| Chân 15 | RA6/OSC2/CLKO — Digital I/O RA6 / oscillator output |
| Chân 16 | RA5 — Digital I/O RA5 |
| Chân 17 | RA4 — Digital I/O RA4 |
| Chân 18 | RA3 — Digital I/O RA3 |
| Chân 19 | RA2 — Digital I/O RA2 |
| Chân 20 | RA1 — Digital I/O RA1 |
| Chân 21 | RA0 — Digital I/O RA0 |
| Chân 22 | VSS — Ground reference |
| Chân 23 | RC7 — Digital I/O RC7 |
| Chân 24 | RC6 — Digital I/O RC6 |
| Chân 25 | RC5 — Digital I/O RC5 |
| Chân 26 | RC4 — Digital I/O RC4 |
| Chân 27 | RC3 — Digital I/O RC3 |
| Chân 28 | RC2 — Digital I/O RC2 |
| Chân 29 | RC1 — Digital I/O RC1 |
| Chân 30 | RC0 — Digital I/O RC0 |
| Chân 31 | VSS — Ground reference |
| Chân 32 | RD7 — Digital I/O RD7 |
| Chân 33 | RD6 — Digital I/O RD6 |
| Chân 34 | RD5 — Digital I/O RD5 |
| Chân 35 | RD4 — Digital I/O RD4 |
| Chân 36 | RD3 — Digital I/O RD3 |
| Chân 37 | RD2 — Digital I/O RD2 |
| Chân 38 | RD1 — Digital I/O RD1 |
| Chân 39 | RD0 — Digital I/O RD0 |
| Chân 40 | RE3 — Digital I/O RE3 (MCLR optional) |
Ứng dụng tiêu biểu
PIC18F45K50T-I/MV phù hợp cho 6 Áp dụngs: USB to UART Bridge Dongle, USB HID Human Interface Device, USB Sensor Data Logger, Low-Power Wireless Sensor Node, Industrial USB Diagnostic Probe, Learning Platform and Educational MCU Kit.
USB to UART Bridge Dongle
The PIC18F45K50T-I/MV is a strong fit for compact USB-to-UART bridge dongles because its on-chip USB 2.0 full-speed transceiver and internal 48 MHz oscillator with Active Clock Tuning remove the need for an external crystal or PHY, shrinking BOM and PCB area. With 32 KB flash and 2 KB SRAM it comfortably runs Microchip's USB CDC stack plus the user's protocol glue. The 2.5 V to 5.5 V VDD range lets the same board power 3.3 V MCUs or 5 V legacy RS-232 chips through an external level shifter, while the 5x5 mm UQFN-40 leaves room for the USB-C connector and ESD protection on a 15x25 mm board.
Được đề xuất
USB HID Human Interface Device
For custom keyboards, mice, touch panels, and other USB HID peripherals, the PIC18F45K50T-I/MV delivers 16 MIPS at 48 MHz - plenty of bandwidth for HID class descriptors, button debouncing, and capacitive sensing via the CTMU/ADC channels. The 35 digital I/O pins allow scanning large matrix keypads without external muxes. Active Clock Tuning ensures USB compliance across the industrial -40 C to +85 C range without a crystal, while XLP nanoamp sleep modes extend battery operation for wireless HID dongles. The UQFN-40 5x5 mm package keeps the PCB small enough to fit inside a USB-A or USB-C plug body.
Được đề xuất
USB Sensor Data Logger
In USB sensor dongles for field data logging, the PIC18F45K50T-I/MV combines 32 KB flash for storing a Mass Storage Class (MSC) firmware plus FAT file-system code with its 10-bit ADC (up to 25 channels) to sample multiple analog sensors simultaneously. The 256 bytes of true EEPROM provides non-volatile configuration storage, while XLP nanoamp sleep currents between samples let a Li-ion cell run for months. The on-chip USB MSC stack (when paired with external SPI flash) makes the part well-suited for unattended environmental, vibration, or temperature loggers that pop up as removable drives on the host.
Được đề xuất
Low-Power Wireless Sensor Node
With XLP deep sleep currents below 100 nA and a 48 MHz active core, the PIC18F45K50T-I/MV is suitable for battery-powered sensor nodes that wake briefly to take measurements over I2C or SPI sensors, store data in flash, then return to sleep. The 2.5 V to 5.5 V VDD range supports a single Li-ion or 2xAA cells without LDO. Although this part is USB-equipped, designers frequently use the USB only for configuration/firmware updates and let the wireless block (an external sub-GHz or BLE module on the same SPI bus) handle RF. The UQFN-40 EP provides low-thermal-resistance dissipation for hot-spot-free always-remote nodes.
Được đề xuất
Industrial USB Diagnostic Probe
For industrial diagnostic probes and programmers, the PIC18F45K50T-I/MV offers 35 robust digital I/O pins tolerant of 5 V inputs and an industrial -40 C to +85 C operating range, ideal for factory-floor tools that interrogate field equipment. The enhanced CCP/PWM, multiple UART/SPI/I2C peripherals let the device bridge between RS-232/RS-485 sensors and a USB host without external logic. On-chip USB MSD/CDC/Vendor-class support makes the same firmware reusable for firmware flashing, log retrieval, or live diagnostics. The UQFN-40 EP aids in dissipating heat in always-on tool applications.
Được đề xuất
Learning Platform and Educational MCU Kit
The PIC18F45K50T-I/MV is widely used in Microchip's low-pin-count USB teaching kits because it offers a real USB stack, 32 KB flash, and 35 I/O at an accessible price point - perfect for learners writing their first CDC/HID firmware. The free MPLAB X IDE + XC8 compiler + MCC code configurator pipeline reduces friction, while on-chip debug via ICSP lets students step through code without extra tools. The UQFN-40 footprint is easy to lay out by hand on a 2-layer PCB, and the 2.5 V to 5.5 V range tolerates the regulator-less lab setups common in coursework. Many universities adopt the K50 family as a baseline 8-bit USB MCU.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F45K50T-I/MV — 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 | PIC18F45K50-I/MV | PIC18F45K42-I/MV | PIC18F45K22-I/MV | PIC18LF45K50T-I/MV | PIC18F44K22-I/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | UQFN-40 (MV) 5x5 mm | UQFN-40 (MV) 5x5 mm - same | UQFN-40 (MV) 5x5 mm - same | UQFN-40 (MV) 5x5 mm - same | UQFN-40 (MV) 5x5 mm - same | UQFN-40 (MV) 5x5 mm - same |
| Core | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit |
| Max Clock Frequency | 48 MHz | 48 MHz | 64 MHz | 64 MHz | 48 MHz | 64 MHz |
| Program Flash | 32 KB | 32 KB | 64 KB | 16 KB | 32 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 1.5 KB | 2 KB | 1.5 KB |
| EEPROM | 256 B | 256 B | 1 KB | 256 B | 256 B | 256 B |
| On-Chip USB 2.0 FS | Yes (with ACT) | Yes (with ACT) | Yes (with ACT) | No | Yes (with ACT) | No |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V |
| I/O Pins | 35 | 35 | 35 | 35 | 35 | 25 |
Bảo phân biệt quan trọng
- On-chip USB 2.0 full-speed with Active Clock Tuning eliminates external crystal (vsPIC18F45K22-I/MV)
- Same UQFN-40 footprint as the K42 family enables a clean upgrade path (vsPIC18F45K42-I/MV)
- Lower-voltage 1.8 V-3.6 V LF variant exists for battery designs (vsPIC18LF45K50T-I/MV)
Ghi chú thiết kế
The UQFN-40 (MV) package exposes a large thermal pad (EP) that MUST be soldered to a continuous ground pour on the top layer with at least 8 thermal vias (0.3 mm hole, 0.6 mm pad) stitching into the inner ground plane. Estimated: at 48 MHz with USB active the part draws roughly 10 mA; the EP keeps the junction well below 70 C with 1 oz copper. Insufficient EP soldering will cause thermal fold-back under USB bus-power stress.
D+ and D+ lines require 15 kV-rated ESD protection (e.g. USBLC6-2SC6) close to the connector; the internal USB transceiver has limited ESD. The VUSB3V3 pin is an internal 3.3V regulator output and MUST be decoupled with at least 1 uF X7R plus 100 nF NP0 per the datasheet. Configure Active Clock Tuning (ACT) when using only the internal oscillator - omitting it can cause USB compliance failures.
Place a 100 nF ceramic + 10 uF bulk capacitor within 5 mm of the VDD pin, with the 100 nF closest to the IC. For USB bus-powered designs, add a 4.7 uF tantalum or polymer on the upstream VBUS after the PTC fuse. The PIC18F45K50 has XLP sleep currents in the tens of nanoamps, so for battery applications use the deep-sleep + RTCC wake rather than WDT polling, and ensure all unused I/O are configured as outputs low.
The 48 MHz core clock generates harmonics up to 250 MHz; route the USB D+/D- traces as a 90 ohm differential pair with continuous ground underneath, no vias, and matching length within 150 mil. ICSP pins RB6/RB7 share the application I/O function; add 4.7 kohm pull-ups on these lines if the design needs bus-detect during ICSP programming. Keep crystal traces (if used) short and symmetric.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Industrial -40 C to +85 C temperature grade only; no AEC-Q100 qualified variant in this package.
