PIC18F26J53-I/ML - 64KB Flash USB MCU 28-VQFN | Microchip
MPN： PIC18F26J53-I/ML ✓ 啟用中PIC18F26J53-I/ML 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripheral interfaces onto one die. PIC18 J-series MCUs extend the classic PIC18 architecture with nanoWatt XLP power management, deep sleep modes, and dedicated USB transceivers, occupying the niche between small 8-bit controllers and 16-bit dsPIC parts in the Microchip hierarchy: 8-bit MCU -> PIC18 -> PIC18 J-series -> USB-capable variant.
Key features include a 12-channel 10-bit ADC (configurable to 12-bit in successive-approximation mode), two analog comparators, two UART/USART, two SPI, and one I2C peripheral. The integrated USB 2.0 full-speed transceiver with on-chip termination eliminates external USB PHY components, while the 64KB self-programmable Flash supports in-application updates. The nanoWatt XLP technology delivers typical sleep currents in the deep-sleep mode, enabling years of battery life on coin-cell powered designs.
The PIC18J53 architecture uses a 16-bit wide instruction word optimized for C-compiled code, with a hardware multiplier and 32 Kbytes of linear program addressing. The enhanced USB SIE handles packet sequencing, CRC, and endpoint management autonomously, freeing the CPU from low-level USB protocol handling. The 28-pin VQFN package with exposed pad enables compact PCB designs in space-constrained applications.
Typical applications include USB HID peripherals such as keyboards, mice, and custom input devices; USB-to-UART bridges; low-power sensor nodes with USB charging; portable medical instruments; and consumer products requiring in-field firmware updates. The deep-sleep mode and on-board USB make this part especially attractive for always-on USB-connected sensor and telemetry applications.
When designing with this part, follow the recommended USB layout guidelines in the datasheet - the D+/D- traces must be 90 ohm differential with matched length, and the VBUS pin requires a 4.7uF bulk capacitor with a ferrite bead for EMI suppression. The exposed thermal pad must be soldered to a copper pour for electrical grounding and thermal dissipation.
This page synthesizes verified distributor pricing, drop-in PIC18 family alternatives, USB design references, and practical application notes beyond the manufacturer datasheet summary.
直接替換替代品，適用於 PIC18F26J53-I/ML — 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： PIC18F26J53-I/ML （相同外形與佔位） — 差異在於 ADC, Package, Core Architecture, Operating Temperature, Program Memory (Flash).
PIC18F27J53-I/ML
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F26J13-I/ML
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F25K50-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC18F24J50-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC18F25K80-I/ML
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F26J53-I/ML 最大額定值與電氣特性
| Product Family | PIC18 J-series |
| Core | 8-bit PIC |
| Program Memory (Flash) | 64 KB |
| Data RAM | 4 KB |
| CPU Speed | 12 MIPS (48 MHz) |
| 供應電壓 | 2.0 V to 3.6 V |
| 工作溫度 | -40C to +85C (industrial) |
| 封裝 | 28-pin VQFN (ML) 6x6 mm with exposed pad |
| I/O Pins | 22 |
| USB Interface | USB 2.0 Full-Speed (12 Mbps) with on-chip transceiver |
| ADC | 10/12-bit, 12 channels |
| Timers | 4 (16-bit / 8-bit) |
| UART/USART | 2 |
| SPI | 2 |
| I2C | 1 |
| Comparators | 2 analog comparators |
| Power-Saving Modes | nanoWatt XLP, deep sleep, sleep, idle |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
PIC18F26J53-I/ML 腳位配置
| 腳位 1 | MCLR — Master clear (reset) input, active low |
| 腳位 2 | RA0 — Digital I/O / analog AN0 |
| 腳位 3 | RA1 — Digital I/O / analog AN1 |
| 腳位 4 | RA2 — Digital I/O / analog AN2 |
| 腳位 5 | RA3 — Digital I/O / analog AN3 |
| 腳位 6 | RA4 — Digital I/O (no AN4 - dedicated digital) |
| 腳位 7 | RA5 — Digital I/O / analog AN4 |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | RA7 — Digital I/O / oscillator input |
| 腳位 10 | RA6 — Digital I/O / oscillator output |
| 腳位 11 | VDD — Positive supply voltage (2.0V-3.6V) |
| 腳位 12 | VSS — Ground reference |
| 腳位 13 | RB0 — Digital I/O / interrupt-on-change |
| 腳位 14 | RB1 — Digital I/O / interrupt-on-change |
| 腳位 15 | RB2 — Digital I/O / interrupt-on-change |
| 腳位 16 | RB3 — Digital I/O / interrupt-on-change |
| 腳位 17 | RB4 — Digital I/O / interrupt-on-change |
| 腳位 18 | RB5 — Digital I/O / interrupt-on-change |
| 腳位 19 | RB6 — Digital I/O / ICSP clock |
| 腳位 20 | VBUS — USB VBUS sensing input (5V tolerant) |
| 腳位 21 | D- — USB D- data line |
| 腳位 22 | D+ — USB D+ data line |
| 腳位 23 | RC0 — Digital I/O |
| 腳位 24 | RC1 — Digital I/O |
| 腳位 25 | RC2 — Digital I/O |
| 腳位 26 | RC3 — Digital I/O |
| 腳位 27 | RC4 — Digital I/O |
| 腳位 28 | RC5 — Digital I/O |
典型應用
PIC18F26J53-I/ML 適用於 6 應用s: USB HID Peripherals, USB-to-UART Bridge, Low-Power Sensor Nodes, Portable Medical Instruments, Consumer USB Devices, In-Field Firmware Update Devices.
USB HID Peripherals
The PIC18F26J53-I/ML is purpose-built for USB Human Interface Device peripherals including keyboards, mice, game controllers, custom HID input devices, and barcode scanners. Its integrated USB 2.0 full-speed transceiver with on-chip pull-up on D+ eliminates external PHY components, reducing BOM cost and PCB area. The 64 KB Flash accommodates composite HID stacks with multiple interfaces, while the 12 MIPS performance handles HID polling rates up to 1000 Hz without CPU bottleneck. The 4 KB RAM supports HID report buffers plus protocol overhead. The 28-pin VQFN (ML) 6x6 mm package fits compact consumer peripherals.
推薦
USB-to-UART Bridge
The PIC18F26J53-I/ML serves as a USB-CDC to UART bridge for legacy serial devices, debug ports, and industrial equipment modernization. With 2 hardware UART channels operating up to 115.2 kbps and the integrated USB 2.0 FS SIE, it provides transparent protocol translation between a host PC and any RS-232/RS-485 device. The 64 KB Flash is sufficient for full CDC ACM driver plus vendor-specific commands, and the 4 KB RAM handles USB endpoint buffers and UART FIFOs. The 28-pin VQFN footprint supports compact dongle form factors commonly used as field service tools.
推薦
Low-Power Sensor Nodes
The PIC18F26J53-I/ML excels in battery-powered wireless sensor nodes with USB charging capability, such as environmental monitors, wearables, and IoT edge devices. The nanoWatt XLP technology delivers 20 nA deep-sleep current, enabling multi-year operation on a single CR2032 coin cell, while the integrated USB 2.0 FS supports both data telemetry and battery charging from a single port. The 12-channel 10/12-bit ADC interfaces directly to analog sensors without external signal conditioning. The 64 KB Flash accommodates over-the-air firmware update protocols and sensor fusion algorithms.
推薦
Portable Medical Instruments
The PIC18F26J53-I/ML supports portable medical devices such as blood glucose meters, pulse oximeters, and personal health monitors requiring USB connectivity for data upload and battery charging. Its 12-bit ADC provides adequate resolution for biosensor signal acquisition, while the USB 2.0 FS port serves as both data interface and charging port via the on-chip 3.3V regulator. The industrial -40C to +85C operating range supports clinical and home-use environments. The nanoWatt XLP deep sleep mode extends battery life between patient measurements.
推薦
Consumer USB Devices
The PIC18F26J53-I/ML powers consumer USB peripherals such as custom gamepads, presentation clickers, MIDI controllers, and USB-connected toys. The integrated USB stack with Microchip's free USB Framework firmware library accelerates time-to-market for HID, CDC, MIDI, and vendor-class devices. The 22 available I/O pins support button matrices, LED drivers, and I2C/SPI peripherals like accelerometers and OLED displays. The 28-pin VQFN (ML) 6x6 mm package enables slim consumer product enclosures.
推薦
In-Field Firmware Update Devices
The PIC18F26J53-I/ML is ideal for industrial equipment requiring USB-based in-field firmware updates, such as programmable logic controllers, motor drives, and test instruments. Its 64 KB self-programmable Flash supports bootloader-based IAP without external memory, while the USB 2.0 FS provides the high-speed update channel. The dual Flash banks enable fail-safe A/B partition updates with automatic rollback on boot failure. The 28-pin VQFN package and 4 KB RAM accommodate the USB stack plus bootloader overhead.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F26J53-I/ML — 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/ML | PIC18F26J13-I/ML | PIC18F25K50-I/ML | PIC18F24J50-I/ML | PIC18F46J53-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | VQFN-28 (ML) 6x6 mm | VQFN-28 (ML) 6x6 mm - same | VQFN-28 (ML) 6x6 mm - same | VQFN-28 (ML) 6x6 mm - same | VQFN-28 (ML) 6x6 mm - same | VQFN-44 (ML) 8x8 mm - different |
| Flash Memory | 64 KB | 128 KB | 64 KB | 32 KB | 16 KB | 64 KB |
| RAM | 4 KB | 4 KB | 4 KB | 2 KB | 4 KB | 4 KB |
| CPU Speed | 12 MIPS @ 48 MHz | 12 MIPS @ 48 MHz | 12 MIPS @ 48 MHz | 16 MIPS @ 48 MHz | 12 MIPS @ 48 MHz | 12 MIPS @ 48 MHz |
| USB Interface | USB 2.0 FS (12 Mbps) on-chip transceiver | USB 2.0 FS - same | No USB | USB 2.0 FS - same | USB 2.0 FS - same | USB 2.0 FS - same |
| Supply Voltage | 2.0V to 3.6V | 2.0V to 3.6V | 2.0V to 3.6V | 2.7V to 5.5V | 2.0V to 3.6V | 2.0V to 3.6V |
| I/O Pins | 22 | 22 | 22 | 25 | 22 | 34 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
主要差異化特點
- Doubles Flash while maintaining identical pinout (對比PIC18F27J53-I/ML)
- Integrated USB 2.0 FS transceiver (對比PIC18F26J13-I/ML)
- 12 MIPS performance with 64KB Flash balance (對比PIC18F25K50-I/ML)
設計說明
USB differential pair (D+ / D-) on pins 21 and 22 must be routed as a 90 ohm differential impedance pair with matched length to within 150 mil. Per Microchip USB design guidelines, place a common-mode choke near the USB connector and keep the D+/D- traces away from switching signals. The VBUS pin requires a 4.7uF bulk capacitor with a ferrite bead for EMI suppression.
The 28-pin VQFN (ML) package has an exposed thermal pad on the underside that must be soldered to a copper pour for electrical grounding and thermal dissipation. Estimated: at 48 MHz with all peripherals active, the part draws ~8 mA from 3.3V, dissipating approximately 26 mW which is well within the package's thermal limits. No additional heatsinking is required.
Do not omit the VBUS capacitor; USB enumeration will fail without proper bulk decoupling. The 3.3V internal regulator requires a 4.7uF capacitor on VDD even when powered from VBUS. Ensure the ICSP programming pins (RB6/RB7) are not loaded with low-value pull-down resistors that interfere with in-circuit programming. Use Microchip's MPLAB X IDE and XC8 compiler for proper code generation.
合規資訊
RoHS compliant and lead-free per Microchip product page. Not AEC-Q100 qualified - this is a commercial/industrial grade MCU; automotive designs should use PIC18F counterparts with -E or -V qualification suffixes.
