PIC18F27J53-I/SP - 8-bit 48MHz USB MCU, 128KB Flash, 28-SPDIP | Microchip
MPN： PIC18F27J53-I/SP ✓ 啟用中PIC18F27J53-I/SP 概覽
What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), and programmable peripherals on one die. The PIC18F27J53 sits in the PIC18 8-bit family hierarchy as: PIC18F27J53 -> PIC18 J-series -> PIC18 family -> 8-bit PIC microcontroller -> Microchip MCU portfolio -> embedded controller IC. Its XLP technology (eXtreme Low Power) provides deep-sleep currents in the nanoamp range, targeting battery-powered and USB-powered embedded designs.
Key features include 12 MIPS peak performance at 48 MHz, 22 channels of 10/12-bit ADC, two analog comparators, hardware DMA moving data between peripherals without CPU intervention, full-speed USB 2.0 device/host/OTG, four 16-bit timers, two MSSP (SPI/I2C), two UART modules, and a CTMU charge-time measurement unit for capacitive touch. The 28-SPDIP package offers through-hole ease-of-use for prototyping and breadboarding while still exposing the full peripheral set.
Architecturally, the PIC18F27J53 uses a Harvard RISC core with a hardware multiplier, 16-bit instructions, and dedicated peripheral DMA channels that allow ADC captures, PWM updates, and USB transfers to run independently of the CPU. This offloading enables deterministic real-time performance and frees the core for application logic in motor control, sensor fusion, or USB HID applications.
Typical applications include USB peripherals such as HID mice/keyboards, CDC virtual COM ports, and audio class devices; industrial sensor nodes using CTMU-based capacitive touch; battery-powered data loggers exploiting nanoWatt XLP sleep currents; small motor control subsystems leveraging PWM and timers; and consumer devices requiring mixed-signal integration with USB connectivity.
When designing with this part, ensure the USB D+/D- lines are routed as a 90-ohm differential pair with the required 15 kohm pull-down on D- in device mode. The wide operating voltage (2.0V-3.6V core / 4.2V-5.5V USB-capable) requires careful LDO selection when powering USB rails.
This page consolidates distributor pricing, verified drop-in alternatives, and practical design notes not found on the manufacturer datasheet.
直接替換替代品，適用於 PIC18F27J53-I/SP — 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： PIC18F27J53-I/SP （相同外形與佔位） — 差異在於 ADC, Operating Temperature, Package, Series, MSL Level.
PIC18F27J53-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18F27J53-I/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F27J53-I/ML
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F26J53-I/SP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC18F27J13-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC18F46J53-I/SP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC18F27J53-I/SP 最大額定值與電氣特性
| Core Processor | PIC18 (8-bit) |
| Core Size | 8-Bit |
| Series | PIC XLP 18J |
| Maximum Clock Speed | 48 MHz |
| Performance | 12 MIPS |
| Program Memory Size | 128 KB (64K x 16) Flash |
| RAM Size | 4 KB |
| 封裝 | 28-SPDIP (0.300", 7.62 mm) |
| 安裝類型 | Through Hole |
| I/O Count | 25 |
| Connectivity | I2C, LINbus, SPI, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT, DMA, CTMU |
| ADC | 12-bit, up to 22 channels |
| 供應電壓 | 2.0 V to 3.6 V (core); 4.2 V to 5.5 V USB-capable |
| 工作溫度 | -40C to +85C (Industrial) |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| MSL 等級 | 1 (unlimited) |
| RoHS 狀態 | Compliant |
PIC18F27J53-I/SP 腳位配置
| 腳位 1 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| 腳位 2 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| 腳位 3 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC VREF- |
| 腳位 4 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC VREF+ |
| 腳位 5 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| 腳位 6 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| 腳位 7 | VDD — Positive supply (2.0-3.6V core / 4.2-5.5V USB) |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| 腳位 10 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| 腳位 11 | RC0/SOSCO — Port C bit 0 / Secondary oscillator output |
| 腳位 12 | RC1/SOSCI — Port C bit 1 / Secondary oscillator input |
| 腳位 13 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| 腳位 14 | RC3/CCP2 — Port C bit 3 / Capture/Compare/PWM 2 |
| 腳位 15 | RC4/D-/VMIO — Port C bit 4 / USB D- line / Vbus monitor input |
| 腳位 16 | RC5/D+/VPIO — Port C bit 5 / USB D+ line / Vbus power input |
| 腳位 17 | RC6 — Port C bit 6 |
| 腳位 18 | RC7 — Port C bit 7 |
| 腳位 19 | VSS — Ground reference |
| 腳位 20 | VDD — Positive supply |
| 腳位 21 | RB0/AN12 — Port B bit 0 / Analog input 12 |
| 腳位 22 | RB1/AN10 — Port B bit 1 / Analog input 10 |
| 腳位 23 | RB2/AN8 — Port B bit 2 / Analog input 8 |
| 腳位 24 | RB3/AN9 — Port B bit 3 / Analog input 9 |
| 腳位 25 | RB4/CCP4 — Port B bit 4 / Capture/Compare/PWM 4 |
| 腳位 26 | RB5/CCP5 — Port B bit 5 / Capture/Compare/PWM 5 |
| 腳位 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| 腳位 28 | RB7/PGD — Port B bit 7 / ICSP data |
典型應用
PIC18F27J53-I/SP 適用於 7 應用s: USB HID Peripherals (Mice, Keyboards, Custom HID), USB CDC Virtual COM Port Devices, Capacitive Touch Sensing (CTMU-based Keypads), Battery-Powered Data Loggers with USB, Small Motor Control (PWM + ADC Feedback), Industrial Sensor Front-Ends (LIN/Analog), Consumer Audio Class USB Devices.
USB HID Peripherals (Mice, Keyboards, Custom HID)
The PIC18F27J53's integrated USB 2.0 full-speed SIE and 128 KB Flash make it an excellent fit for USB HID devices such as mice, keyboards, game controllers, and custom HID-class peripherals. The hardware DMA channels move HID report data directly between endpoint buffers and RAM, freeing the 12 MIPS core for button matrix scanning and report formatting. With 4 KB RAM, the device can sustain high HID report rates while maintaining descriptor handling. Designers benefit from Microchip's free USB stack and HID bootloader, which leverage the ICSP self-programming Flash for firmware updates over USB.
推薦
USB CDC Virtual COM Port Devices
The PIC18F27J53-I/SP supports USB Communication Device Class (CDC) implementations that appear as virtual COM ports to a host PC, eliminating the need for external RS-232 transceivers or USB-to-UART bridges. Its two UART peripherals can be tunneled to USB, allowing legacy RS-232 firmware to bridge to USB transparently. The 12 MIPS performance ensures smooth throughput at 115200+ baud virtual COM rates, while the 4 KB RAM supports bulk endpoint buffering. This makes the chip ideal for industrial configuration interfaces, debug ports, and firmware-update tools where legacy serial design patterns remain in use.
推薦
Capacitive Touch Sensing (CTMU-based Keypads)
The PIC18F27J53's on-chip CTMU (Charge Time Measurement Unit) combined with the 12-bit ADC and 22 analog channels supports capacitive touch sensing for keypads, sliders, and proximity sensors. The CTMU delivers constant current sources that allow the ADC to measure charge-time differences on capacitive electrodes with sub-percent accuracy, all without external analog components. The XLP deep-sleep mode keeps touch scanning consumption in the microamp range, suiting battery-powered white goods, appliances, and IoT user interfaces. Designers benefit from Microchip's mTouch library for the PIC18 platform.
推薦
Battery-Powered Data Loggers with USB
The PIC18F27J53-I/SP's nanoWatt XLP technology and 128 KB Flash are ideal for battery-powered data loggers that periodically wake up to acquire sensor data, store it in Flash, and dump to a host via USB. Deep-sleep currents in the nanoamp range allow multi-year battery life when acquisition intervals are long, while the integrated USB eliminates external bridges for log retrieval. The 12-bit ADC at 22 channels supports multi-sensor arrays (temperature, voltage, current), and the DMA engine can stream ADC samples directly to RAM without waking the core for high-rate bursts.
推薦
Small Motor Control (PWM + ADC Feedback)
The PIC18F27J53-I/SP delivers 12 MIPS and four 16-bit timers with hardware PWM, supporting DC brush, stepper, and small BLDC motor control applications. The 12-bit ADC provides current/voltage feedback sensing at up to 200 ksps with hardware DMA, enabling precise torque and speed control loops without CPU bottlenecking. The 25 I/O pins are sufficient for quadrature encoder inputs, Hall sensors, and half-bridge driver enable lines. Designers can use the CTMU as a zero-crossing detector for low-cost sensorless BLDC commutation in fan or pump drives.
推薦
Industrial Sensor Front-Ends (LIN/Analog)
The PIC18F27J53-I/SP includes LIN-bus connectivity, SPI/I2C MSSP, and a 12-bit ADC, making it suitable for industrial sensor front-ends and LIN slaves. LIN 2.x support, combined with on-chip PWM and timers, enables cost-effective LIN motor and actuator nodes in automotive body electronics and factory automation. The robust industrial temperature range (-40C to +85C) supports outdoor and under-hood sensor placement, while the 128 KB Flash accommodates LIN stack libraries and application firmware in a single chip.
推薦
Consumer Audio Class USB Devices
The PIC18F27J53's USB Audio Class support and DMA-driven endpoint streaming allow it to implement USB speakers, headsets, and audio control surfaces at low BOM cost. The two MSSP peripherals can drive external I2S DACs, while the 12 MIPS core runs basic audio mixing or sample-rate conversion. With 4 KB RAM and ping-pong endpoint buffering via DMA, the chip sustains stable isochronous USB audio streams. Designers can pair it with low-cost audio DACs to create complete USB audio peripherals without dedicated audio processors.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F27J53-I/SP — 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 | PIC18F27J53-I/SO | PIC18F27J53-I/SS | PIC18F26J53-I/SP | PIC18F27J13-I/SS |
|---|---|---|---|---|---|
| Package | 28-SPDIP | 28-SOIC | 28-SSOP | 28-SPDIP (same) | 28-SSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 128 KB | 128 KB (same) | 128 KB (same) | 64 KB (-50%) | 128 KB (same) |
| RAM | 4 KB | 4 KB (same) | 4 KB (same) | 3.6 KB | 4 KB (same) |
| USB 2.0 | Yes (FS Device/Host/OTG) | Yes (same) | Yes (same) | Yes (same) | Yes (same) |
| CTMU (Capacitive Touch) | Yes | Yes (same) | Yes (same) | Yes (same) | No |
| DMA Channels | Yes (8 channels) | Yes (same) | Yes (same) | Yes (same) | No |
| Maximum Clock | 48 MHz | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) |
| Unit Price (qty 1) | ~$6.12 USD | ~$5.95 USD | ~$5.80 USD | ~$5.40 USD | ~$5.20 USD |
主要差異化特點
- 128 KB Flash with hardware DMA + CTMU in 28-SPDIP (對比PIC18F27J13-I/SS)
- Same 128 KB Flash as J53 but in 64 KB part (對比PIC18F26J53-I/SP)
- Through-hole SPDIP for breadboard-friendly prototyping (對比PIC18F27J53-I/ML (QFN))
設計說明
Route the USB D+ and D- lines as a 90-ohm differential pair with controlled impedance on the outer PCB layer, keeping them short and away from switching signals. Place the 15 kohm pull-down resistor on D- (device mode) or D+ (host mode) within 50 mm of the USB connector. Add common-mode chokes if the design must pass radiated emissions testing.
Decouple each VDD/VSS pair with 100 nF ceramic capacitors placed within 3 mm of each pin pair, plus a 10 uF bulk capacitor near the regulator output. When operating USB mode (4.2-5.5V Vbus), the internal 3.3V LDO requires its VDD/VSS pair decoupled as per datasheet recommendation to keep ripple below 50 mV for USB signaling compliance.
Do not assume the ICSP pins RB6/RB7 are 5V tolerant on this part - they require 3.3V signaling from programmers. When migrating firmware from PIC18F2550/4550 designs, the J-series requires PLL configuration changes (48 MHz PLL is on by default with internal clock) and the configuration word bit positions differ; consult the PIC18F27J53 datasheet configuration section before porting.
The 28-SPDIP footprint requires 0.100" (2.54 mm) pin pitch with 0.030" (0.76 mm) drill and standard 0.060" (1.5 mm) pad. For hand-soldered prototypes, use sockets to allow quick firmware iteration. Keep analog traces (RA/RC analog functions) away from digital switching to minimize crosstalk into the ADC measurements.
合規資訊
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified; for automotive USB applications, consider PIC18F25K50 in AEC-Q100 qualified versions.
