PIC18F2553-I/SO - 8-bit 48MHz USB MCU 32KB Flash | Microchip
MPN: PIC18F2553-I/SO ✓ Hoạt độngPIC18F2553-I/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, peripheral interfaces and I/O on one die. Within the broader semiconductor hierarchy, the PIC18F2553 sits in the PIC18 enhanced flash family of 8-bit RISC microcontrollers from Microchip, which target applications that need richer peripherals (USB, ADC, multiple serial ports) than baseline PIC10/12/16 parts but do not require a 16-bit or 32-bit core. The PIC18 family uses a 16-bit instruction word on an 8-bit data path, allowing linear addressing of larger memory arrays.
Key features include nanoWatt power-management modes for battery-aware designs, three serial ports (FS-USB, I2C, SPI up to 10 Mbit/s), a 10-channel 12-bit ADC with on-chip acquisition, two analog comparators, a Capture/Compare/PWM (CCP) module, an Enhanced CCP module, and an internal 8 MHz oscillator that can be switched to 32 MHz via the 4x PLL to reach the full 48 MHz MIPS rate. A hardware USART and a parallel slave port round out the peripheral set, and the part supports in-circuit serial programming (ICSP) plus in-circuit debug.
Typical applications include USB HID / CDC peripherals (custom keyboards, mice, sensor bridges, virtual COM ports), low-cost data-acquisition front-ends, industrial sensor conditioning with the 12-bit ADC, capacitive-touch user interfaces, LED controllers and small consumer appliances that need on-the-go connectivity without an external PHY. The integrated FS-USB transceiver and the on-chip 3.3V regulator remove the need for an external PHY or LDO for the bus pull-up rail.
When designing, observe the 4.2 V minimum VDD for the 48 MHz configuration; below this the part must be derated to a lower Fosc. Place a 1 uF bulk + 0.1 uF decoupling pair close to VDD, keep the D+/D- traces length-matched and 90 ohm differential impedance, and reserve an ICSP header (PGD/PGC/VPP/GND) for factory programming.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not typically gathered in a single place on the manufacturer datasheet, including USB PCB-layout guidance and PIC18-to-PIC18F2xKxx migration notes.
Bộ thay thế dễ dàng lắp đặt cho PIC18F2553-I/SO — 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 PIC18F2553-I/SO (cùng hình factor và footprint) — khác nhau ở Package, ADC, Timers, Serial Interfaces, I/O Pins.
PIC18F2550-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2455-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2553T-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F25K50-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2553-I/SO Tỷ lệ tối đa & tính chất điện
| Device Family | PIC18F255x (PIC18 enhanced flash, USB) |
| Core Architecture | 8-bit PIC18 RISC, 16-bit instruction word |
| Maximum CPU Frequency | 48 MHz (12 MIPS) |
| Program Flash Memory | 32 KB (16K x 16) |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| Supply Voltage (VDD) | 4.2 V to 5.5 V (full 48 MHz); 2.0 V to 5.5 V (lower Fosc) |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial, "I" grade) |
| I/O Pins | 25 |
| ADC | 10-channel, 12-bit, successive approximation |
| USB Interface | USB 2.0 Full-Speed (12 Mbit/s), on-chip transceiver |
| Serial Interfaces | FS-USB, I2C (Master/Slave), SPI (up to 10 Mbit/s), EUSART |
| Timers | Timer0/1/2/3 + 2 CCP + 1 ECCP |
| Analog Comparators | 2 |
| Internal Oscillator | 8 MHz, switchable to 32 MHz via 4x PLL (48 MIPS) |
| Hộp | 28-pin SOIC (300-mil), "SO" designator |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Programming/Debug | ICSP (2-wire), ICD support |
Cấu hình chân PIC18F2553-I/SO
| Chân 1 | MCLR/VPP/RE3 — Master clear reset (active low) / programming voltage input / digital I/O RE3 |
| Chân 2 | RA0/AN0 — PORTA bit 0, analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1, analog input 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2, analog input 2, ADC negative reference |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3, analog input 3, ADC positive reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4, Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5, analog input 4, SPI slave select |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/CLKI — Crystal input / external clock input |
| Chân 10 | OSC2/CLKO — Crystal output / clock output |
| Chân 11 | VDD — Positive supply voltage (4.2 V to 5.5 V) |
| Chân 12 | VSS — Ground reference |
| Chân 13 | RB0/AN12/INT0 — PORTB bit 0, analog input 12, external interrupt 0 |
| Chân 14 | RB1/AN10/INT1 — PORTB bit 1, analog input 10, external interrupt 1 |
| Chân 15 | RB2/AN8/INT2 — PORTB bit 2, analog input 8, external interrupt 2 |
| Chân 16 | RB3/AN9/CCP2 — PORTB bit 3, analog input 9, Capture/Compare/PWM 2 |
| Chân 17 | RB4/AN11 — PORTB bit 4, analog input 11 |
| Chân 18 | RB5/KBI1/PGM — PORTB bit 5, interrupt-on-change, LVP programming |
| Chân 19 | RB6/KBI2/PGC — PORTB bit 6, ICSP clock input |
| Chân 20 | RB7/KBI3/PGD — PORTB bit 7, ICSP data I/O |
| Chân 21 | RC0/T1OSO/T1CKI — PORTC bit 0, Timer1 oscillator output / clock input |
| Chân 22 | RC1/T1OSI/CCP2 — PORTC bit 1, Timer1 oscillator input, CCP2 alt |
| Chân 23 | RC2/CCP1 — PORTC bit 2, Capture/Compare/PWM 1 |
| Chân 24 | VUSB — Internal USB 3.3 V regulator output, decoupling to VSS |
| Chân 25 | RC4/D- — PORTC bit 4, USB D- data line |
| Chân 26 | RC5/D+ — PORTC bit 5, USB D+ data line |
| Chân 27 | RC6/TX/CK — PORTC bit 6, EUSART TX / clock |
| Chân 28 | RC7/RX/DT — PORTC bit 7, EUSART RX / data |
Ứng dụng tiêu biểu
PIC18F2553-I/SO phù hợp cho 7 Áp dụngs: USB HID Peripheral (Keyboard / Mouse / Sensor Bridge), USB CDC Virtual COM Port / Data Acquisition Front-End, Industrial Sensor Conditioning / 4-20 mA Transmitter, Capacitive Touch User Interface, LED Lighting Controller (DMX / WS28xx / Art-Net), Consumer Appliance User Interface / Battery Charger, Educational / Hobbyist Development Platform.
USB HID Peripheral (Keyboard / Mouse / Sensor Bridge)
The PIC18F2553-I/SO is a strong fit for USB HID peripherals because its integrated USB 2.0 Full-Speed transceiver, on-chip 3.3 V VUSB regulator, and 12 MIPS PIC18 core can run Microchip's free USB HID bootloader and HID class driver without an external PHY. Designers typically wire D+ and D- directly to the USB connector with a 90 ohm differential pair, attach a 1.5 kohm pull-up on D+ for full-speed detection, and add 0.1 uF decoupling on VUSB. With 32 KB of flash and 2 KB of SRAM, the part comfortably fits a USB HID stack plus custom I/O handling for buttons, rotary encoders, or sensor reports; pin-to-pin drop-in alternatives (PIC18F2550-I/SO, PIC18F25K50-I/SO) cover firmware-size and migration variants.
Được đề xuất
USB CDC Virtual COM Port / Data Acquisition Front-End
For low-cost USB-to-UART bridges or CDC-based DAQ modules, the PIC18F2553-I/SO's 48 MHz CPU and FS-USB peripheral deliver 12 MIPS of throughput for the CDC class driver plus a fixed-rate ADC streaming pipeline. The 10-channel 12-bit ADC supports up to 100 ksps aggregate with DMA-style double-buffering in firmware, and the nanoWatt sleep modes keep idle current under 5 uA for battery-aware designs. Compared to the PIC18F2550-I/SO, the F2553's 32 KB flash lets the device run the full CDC stack plus a small command interpreter and oversampling firmware. Pin-compatible same-brand alternatives (PIC18F2455-I/SO) allow a designer to keep one PCB footprint and swap silicon if supply tightens.
Được đề xuất
Industrial Sensor Conditioning / 4-20 mA Transmitter
The PIC18F2553-I/SO's 12-bit ADC, two analog comparators and nanoWatt power-management suite suit 4-20 mA loop-powered sensor transmitters where the MCU must digitize analog signals, run linearization math, and drive a current loop from a tightly regulated supply. Running at 48 MHz from the VDD rail and idling in sleep between conversions keeps average current below the 3.5 mA loop budget, while the 2 KB of SRAM holds transient oversampling buffers. The same SOIC-28 footprint is shared by the PIC18F2550-I/SO and PIC18F25K50-I/SO, so a board designed for the F2553 accepts its pin-compatible variants without layout changes, helping industrial buyers manage multi-sourcing.
Được đề xuất
Capacitive Touch User Interface
For low-cost capacitive touch panels (keypads, sliders, proximity wake-up), the PIC18F2553-I/SO's nanoWatt mode, hardware timer-capture blocks and 12-bit ADC enable the mTouch firmware framework from Microchip to scan up to ~12 electrodes without an external touch controller. The internal 8 MHz RC oscillator provides low-power wake-ups, and the 4x PLL brings the core to 48 MHz for response-heavy gestures. Adding the USB peripheral makes it easy to expose the touch state as a HID digitizer over USB, while the 28-pin SOIC footprint keeps the BOM under 50 cents per axis. The PIC18F2550-I/SO is the closest same-brand drop-in for simpler buttons-only touch panels.
Được đề xuất
LED Lighting Controller (DMX / WS28xx / Art-Net)
LED controllers that decode DMX-512 or drive WS28xx daisy-chained LEDs need a real-time bit-banging peripheral plus USB for configuration, both of which the PIC18F2553-I/SO provides via its SPI peripheral (up to 10 Mbit/s), hardware PWM/CCP blocks, and integrated USB. The 48 MHz CPU sustains 800 kHz WS28xx refresh for several hundred pixels per output pin while servicing USB CDC control traffic. The 28-pin SOIC variant is small enough for a 25 mm x 30 mm controller board, and the part's industrial temperature grade is comfortable for outdoor-rated lighting. Designers wanting more RAM or a faster core migrate to the PIC18F25K50-I/SO with no PCB rework.
Được đề xuất
Consumer Appliance User Interface / Battery Charger
Consumer appliances from coffee machines to cordless vacuum battery chargers benefit from the PIC18F2553-I/SO's mix of analog (12-bit ADC, two comparators for current sensing), PWM (CCP + ECCP for switch-mode power stages) and USB (for diagnostics or firmware upgrade via service connector). The 32 KB flash accommodates a small real-time operating loop and a USB CDC diagnostic interface, while the 2 KB SRAM holds ADC averaging buffers for current measurements. The industrial temperature grade (-40 C to +85 C) covers most household-appliance environments, and pin-compatible same-brand parts (PIC18F2550-I/SO) let designers downsize flash for cost-sensitive variants.
Được đề xuất
Educational / Hobbyist Development Platform
The PIC18F2553-I/SO is widely used on hobbyist development boards (PICKit 3-compatible ICD boards, custom USB trainers) because it combines a popular 8-bit PIC core with built-in USB so students do not need an external UART-to-USB bridge chip. The 28-pin SOIC is hand-solderable with basic tooling, the ICSP header only needs four signals (PGD/PGC/VPP/GND), and free Microchip tools (MPLAB X IDE, XC8 compiler, MCC code configurator) support it. Pin-compatible same-brand alternatives (PIC18F2455-I/SO and PIC18F2550-I/SO) let instructors teach with one board that scales across memory sizes without redesigning the PCB.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F2553-I/SO — 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 | PIC18F2550-I/SO | PIC18F2455-I/SO | PIC18F2553T-I/SO | PIC18F25K50-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SOIC (300-mil) | 28-pin SOIC (same) | 28-pin SOIC (same) | 28-pin SOIC (same) | 28-pin SOIC (same) |
| Max CPU Frequency | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 64 MHz (16 MIPS, +33%) |
| Program Flash | 32 KB | 16 KB (-50%) | 24 KB (-25%) | 32 KB (same) | 32 KB (same) |
| SRAM | 2 KB | 2 KB | 1.2 KB (-40%) | 2 KB | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| USB Peripheral | FS-USB 2.0 (12 Mbit/s) | FS-USB 2.0 (same) | FS-USB 2.0 (same) | FS-USB 2.0 (same) | FS-USB 2.0 with OTG option |
| ADC | 10-ch 12-bit | 10-ch 12-bit (same) | 10-ch 12-bit (same) | 10-ch 12-bit (same) | 14-ch 12-bit (+40% channels) |
| Supply Voltage (full speed) | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 1.8 V to 5.5 V (wider) |
Bảo phân biệt quan trọng
- Largest flash in same-package PIC18F2x53 lineup (vsPIC18F2550-I/SO)
- Higher CPU headroom and wider supply range than legacy F255x (vsPIC18F25K50-I/SO)
- More flash than PIC18F2455 in same 28-SOIC footprint (vsPIC18F2455-I/SO)
Ghi chú thiết kế
USB differential-pair layout is the single most important PCB decision on a PIC18F2553 board. Route D+ (RC5) and D- (RC4) as a 90 ohm differential pair with continuous ground reference, no splits in the reference plane under the pair, and total length under 25 mm where possible. Place the 1.5 kohm pull-up on D+ to VUSB (3.3 V, not VDD) as close to the D+ pin as possible, and add a USBLC6-2SC6 or similar ESD array right at the USB connector. The 0.1 uF + 1 uF decoupling pair on VUSB and a 0.1 uF + 1 uF pair on VDD must be placed within 3 mm of the respective pins.
At 48 MHz Fosc the PIC18F2553 draws roughly 15 to 25 mA of I/O supply current depending on peripheral activity, plus up to 8 mA on VUSB for the USB transceiver. Use a low-dropout regulator such as MCP1700 or MCP1826S that can deliver 50 mA with at least 200 mV of headroom, and tie the brown-out reset (BOR) enable fuse so the part does not run at indeterminate VDD levels during slow power ramps. Below 4.2 V the device can still run, but the maximum Fosc must be reduced per the datasheet derating curves (e.g., 3.0 V VDD limits the part to about 40 MHz).
Three common pitfalls on PIC18F2553 designs: (1) forgetting the ICSP header and not being able to recover a device whose configuration bits disable the LVP pin, so always reserve 2x3 or 2x5 pin header with PGD/PGC/VPP/MCLR/VSS/VDD; (2) enabling the internal PLL with a wrong CPUDIV configuration and ending up with the core off-frequency, which produces USB enumeration failures - always set PLLCFG to the right HFINTOSC source and CPUDIV to /1 for 48 MHz; (3) assuming the 3.3 V VUSB regulator can source the pull-up resistor and external circuits - VUSB is for the USB transceiver only and cannot supply more than about 5 mA externally.
Estimated: the PIC18F2553 in 28-SOIC has a theta_JA of approximately 80 C/W in still air on a standard 2-layer JEDEC test PCB, and roughly 50 C/W on a 4-layer board with a continuous ground pour. At 25 mA VDD current and 5.0 V VDD the part dissipates about 125 mW, giving a junction temperature rise of 10 C above ambient on a 4-layer board, well below the 150 C Tj limit. On a 2-layer board the rise is around 16 C, still comfortable, so no heatsink is needed unless the device is mounted in an enclosed enclosure with no airflow.
Place the 28-SOIC footprint on a 0.65 mm pitch with the standard SOIC-28 land pattern (IPC-SM-782). The ICSP header should be placed at the board edge for factory programming access, and any debugger clip must clear the crystal or external oscillator components on pins 9-10. Keep the ICSP trace between MCLR/VPP and the ICSP header short (under 30 mm) and include a small series resistor (10 to 100 ohm) to dampen ringing on the high-impedance MCLR line during programming.
Thông tin tuân thủ
RoHS compliant per Microchip product page; lead-free and halogen-free per Microchip material declaration. Not AEC-Q100 qualified - industrial (-40 to +85 C) only. The "I" suffix in -I/SO denotes industrial temperature grade. No MIL-STD or IEC qualification certificates are published for this part.
