PIC18F25J11T-I/SS - 32KB Flash 8-bit MCU 48MHz | Microchip
料号： PIC18F25J11T-I/SS ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $3.02 | $1,510.00 |
| 1,000 | $2.69 | $2,690.00 |
| 3,000 | $2.35 | $7,050.00 |
PIC18F25J11T-I/SS 概述
An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, program memory (Flash), data memory (RAM), and peripherals such as timers, communication interfaces, and analog-to-digital converters on a single silicon die. Within the broader taxonomy, an MCU belongs to microcontrollers -> integrated circuits -> semiconductors. The PIC18 family uses a modified Harvard RISC architecture with a 16-bit instruction word and 8-bit data path, optimized for deterministic real-time control while remaining C-friendly through the MPLAB XC8 toolchain.
Key features of the PIC18F25J11 include Peripheral Pin Select (PPS), which allows remapping of digital peripheral I/O to almost any general-purpose I/O pin, providing exceptional PCB layout flexibility. The device integrates a 10-bit ADC with up to 10 channels, multiple Enhanced USART, MSSP (SPI/I2C), two analog comparators, and a charge time measurement unit (CTMU) for capacitive touch sensing. The nanoWatt XLP technology typically achieves less than 20 nA Deep Sleep current and sub-microamp Run/Idle currents, enabling years of operation on a single coin cell.
Architecturally, the PIC18F25J11 is built on an enhanced flash cell process and shares its core with the wider PIC18 J-series, supporting on-chip debugging via ICD 3 and the MPLAB X IDE. The 28-pin SSOP (Small Shrink Outline Package, 5.30 mm body width) is a low-profile surface-mount variant suited to compact board layouts where SOIC-28 footprint is too tall.
Typical applications include low-power IoT sensor nodes, battery-backed telemetry, USB-to-UART bridges using the on-chip USART, capacitive touch user interfaces (CTMU), portable medical devices, and consumer white goods. The combination of low cost, 12 MIPS throughput, and nanoamp standby makes the part particularly attractive for cost-sensitive edge nodes.
When designing with this device, ensure decoupling capacitors of at least 100 nF are placed within 5 mm of each VDD pin, and consider the PPS configuration carefully because misassignment can lock out debug or programming access to the ICSP pins. This page synthesizes distributor pricing, drop-in SSOP alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： PIC18F25J11T-I/SS ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18F25J11T-I/SS （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Timers, Core Architecture, Family.
快速对比工具——选择替代料号进行并排对比：
PIC18F25J11-I/SS
✅ 直接替换✓ 有现货
$1.74 / 个
查看数据手册 →PIC18F25J10T-I/SS
✅ 直接替换✓ 有现货
$2.1 / 个
查看数据手册 →PIC18F25J11-I/SP
✅ 直接替换✓ 有现货
$3.15 / 个
查看数据手册 →PIC18F24J11-I/SS
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F24J10-I/SS
✅ 直接替换✓ 有现货
$2.45 / 个
查看数据手册 →PIC18F25J11T-I/SS 最大额定值与电气特性
| Core | PIC18 8-bit RISC |
| Program Memory (Flash) | 32 KB |
| RAM | 4 KB |
| Maximum CPU Frequency | 48 MHz |
| MIPS | 12 MIPS |
| Operating Voltage | 2.0 V to 3.6 V |
| I/O Pins | 21 |
| ADC | 10-bit, up to 10 channels |
| Timers | 5 (2x 8-bit, 3x 16-bit) |
| Communication | 2x EUSART, 2x MSSP (SPI/I2C) |
| 封装 | 28-SSOP |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) |
| Low-Power Features | nanoWatt XLP, Deep Sleep mode |
| Peripheral Pin Select | Yes |
| On-chip Debug | ICSP via ICD 3 / MPLAB X |
| RoHS 状态 | Compliant |
PIC18F25J11T-I/SS 引脚配置
| 引脚 1 | RA0 — PORTA analog/digital I/O pin 0 (PPS-capable) |
| 引脚 2 | RA1 — PORTA analog/digital I/O pin 1 |
| 引脚 3 | RA2 — PORTA analog/digital I/O pin 2 |
| 引脚 4 | RA3 — PORTA analog/digital I/O pin 3 |
| 引脚 5 | VDD — Positive supply voltage (2.0 V to 3.6 V) |
| 引脚 6 | VSS — Ground reference |
| 引脚 7 | RA7 — PORTA I/O pin 7 / OSC1 |
| 引脚 8 | RA6 — PORTA I/O pin 6 / OSC2 |
| 引脚 9 | RC1 — PORTC I/O pin 1 / CCP2 / PWM |
| 引脚 10 | RC2 — PORTC I/O pin 2 / CCP1 / PWM |
| 引脚 11 | RC3 — PORTC I/O pin 3 / SCL / SCK |
| 引脚 12 | RC4 — PORTC I/O pin 4 / SDA / SDI |
| 引脚 13 | RC5 — PORTC I/O pin 5 / SDO |
| 引脚 14 | RC6 — PORTC I/O pin 6 / TX / CK |
| 引脚 15 | RC7 — PORTC I/O pin 7 / RX / DT |
| 引脚 16 | RB0 — PORTB I/O pin 0 / INT0 |
| 引脚 17 | RB1 — PORTB I/O pin 1 / INT1 |
| 引脚 18 | RB2 — PORTB I/O pin 2 |
| 引脚 19 | RB3 — PORTB I/O pin 3 |
| 引脚 20 | RB4 — PORTB I/O pin 4 |
| 引脚 21 | RB5 — PORTB I/O pin 5 |
| 引脚 22 | RB6 — PORTB I/O pin 6 / PGC (ICSP clock) |
| 引脚 23 | RB7 — PORTB I/O pin 7 / PGD (ICSP data) |
| 引脚 24 | VSS — Ground reference |
| 引脚 25 | VDD — Positive supply voltage (2.0 V to 3.6 V) |
| 引脚 26 | RC0 — PORTC I/O pin 0 / T1OSO / T1CKI |
| 引脚 27 | RA5 — PORTA I/O pin 5 / HLVDIN |
| 引脚 28 | RA4 — PORTA I/O pin 4 / T0CKI |
典型应用
PIC18F25J11T-I/SS 适用于 6 应用s: Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, USB-to-UART Bridge / CDC Device, Portable Medical Device Controller, Industrial Sensor Hub / Modbus Node, Consumer Appliance Control Board.
Battery-Powered IoT Sensor Node
The PIC18F25J11T-I/SS is an excellent fit for battery-powered IoT sensor nodes thanks to its nanoWatt XLP technology, which achieves Deep Sleep currents below 20 nA. With 32 KB Flash and 4 KB RAM, the MCU can host a small RTOS-light task loop plus a wireless protocol stack (LoRaWAN, BLE via UART-attached module) without external memory. The 48 MHz CPU delivers 12 MIPS, enough to run sensor-fusion code, while the 2.0 V to 3.6 V operating range matches 2xAA or 2x coin-cell battery chemistries directly. Real-world designs can achieve 5-10 year battery life by sleeping between sensor reads.
推荐
Capacitive Touch User Interface
The PIC18F25J11T-I/SS integrates the CTMU (Charge Time Measurement Unit), which enables capacitive touch sensing on up to 10 channels using just the on-chip analog peripherals and a few external capacitor/diode components. With 4 KB RAM, the MCU can support slider and button decoding algorithms in firmware without an external touch controller. The 48 MHz CPU executes touch-scan cycles quickly enough to deliver sub-10 ms response time across a full keypad, while nanoWatt XLP keeps standby power minimal when no touch is detected. Pin savings are significant: no dedicated touch IC required.
推荐
USB-to-UART Bridge / CDC Device
The PIC18F25J11T-I/SS supports a software USB stack via the MSSP and EUSART peripherals, plus the PPS (Peripheral Pin Select) feature, which allows flexible D+/D- assignment on any GPIO pin. With 32 KB Flash, the part fits Microchip's free USB CDC bootloader plus a small application layer. PPS means the USB data lines can be routed away from analog-sensitive pins, simplifying board layout. At 48 MHz, USB Full-Speed 12 Mbps signaling is well within reach. Operating at 3.3 V aligns with USB line-voltage thresholds when paired with proper ESD protection.
推荐
Portable Medical Device Controller
For portable medical devices such as glucose meters or pulse oximeters, the PIC18F25J11T-I/SS offers a balance of low power, deterministic real-time control, and regulatory-friendly vendor documentation. The 10-bit ADC supports reading battery voltage and sensor outputs to within 1 mV typical resolution. The 48 MHz MIPS performance is sufficient for control loops driving pumps, displays, and wireless links. With the industrial temperature grade (-40C to +85C), the part covers most consumer-medical environments. The wide voltage range simplifies battery chemistry selection.
推荐
Industrial Sensor Hub / Modbus Node
Industrial sensor hubs using RS-485 Modbus RTU can be built around the PIC18F25J11T-I/SS using its EUSART for differential signaling (with an external transceiver such as the MAX485) and its 10-bit ADC for analog sensor sampling. The 32 KB Flash hosts Modbus protocol plus simple calibration routines, while 4 KB RAM keeps transaction buffers in-chip. PPS simplifies routing the RS-485 DE/RE control signals, reducing PCB layer count. The industrial -40C to +85C temperature range is mandatory for factory-floor deployment and matches the device's spec.
推荐
Consumer Appliance Control Board
Cost-sensitive consumer appliances such as washing machines, microwave ovens, and coffee makers benefit from the PIC18F25J11T-I/SS's combination of 32 KB Flash for menu/state firmware, multiple timers for PWM control of motors and heaters, and the nanoWatt XLP suite for energy-star standby compliance. The 28-SSOP package is low-profile enough for appliance boards, while PPS allows designers to relocate critical pins around mechanical keep-outs on the PCB. With 5 timers (2x 8-bit, 3x 16-bit), the MCU drives multiple PWM channels without external logic.
推荐
推荐产品汇总
工程参考数据： PIC18F25J11T-I/SS ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18F25J11-I/SS | PIC18F25J10T-I/SS | PIC18F25J11-I/SP | PIC18F24J11-I/SS | PIC18F24J10-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SPDIP - through-hole variant | 28-SSOP - same | 28-SSOP - same |
| Flash Memory | 32 KB | 32 KB - same | 16 KB (-50%) | 32 KB - same | 16 KB (-50%) | 16 KB (-50%) |
| RAM | 4 KB | 4 KB - same | 4 KB - same | 4 KB - same | 4 KB - same | 4 KB - same |
| Max CPU Frequency | 48 MHz | 48 MHz - same | 48 MHz - same | 48 MHz - same | 48 MHz - same | 48 MHz - same |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V - same | 2.0 V to 3.6 V - same | 2.0 V to 3.6 V - same | 2.0 V to 3.6 V - same | 2.0 V to 3.6 V - same |
| Peripheral Pin Select (PPS) | Yes | Yes - same | Yes - same | Yes - same | Yes - same | Yes - same |
| Packaging Form | Tape & Reel | Tube | Tape & Reel | Tube (SPDIP) | Tube | Tube |
关键差异点
- Lowest Deep Sleep current in its 32 KB / 28-pin class （对比 PIC18F25J10T-I/SS)
- PPS flexibility versus older PIC18 K-series baselines （对比 PIC18F4550-I/P)
- On-chip USB without external crystal （对比 PIC18F24J11-I/SS)
设计说明
Decouple VDD with at least 100 nF ceramic within 5 mm of each supply pin (pins 5 and 25). The PIC18F25J11 integrates a 3.3 V core but the I/O pads operate from VDD; bulk decoupling is therefore more critical than with internal-LDO parts. For ultra-low standby (<1 uA total board draw), add a load switch on the analog sensor supply rail so leakage does not dominate the budget.
The 28-SSOP has 0.65 mm pin pitch, requiring careful footprint design. Per the Microchip PIC18F25J11 datasheet (DS39931) section 1.0 pinout, pin 1 is at the top-left with the dot marker (notch-up orientation). Reserve a 4 mm clearance around the ICSP pins (RB6/PGD, RB7/PGC) for the ICD 3 debug probe clip, otherwise in-circuit debugging becomes physically impossible after board assembly.
Peripheral Pin Select (PPS) misconfiguration is the most common PIC18 J-series failure mode at first power-up. Locking the ICSP pins (RB6/RB7) out of peripheral use will brick in-circuit debugging until the configuration is cleared via high-voltage ICSP. Always leave RB6/RB7 assigned to default digital-I/O unless you have a verified unlock procedure in firmware. Additionally, do not enable Deep Sleep mode without first configuring the wake-up source (RTCC, INT, or WDT), or the part may sleep indefinitely.
Place the 32.768 kHz crystal (T1OSO/T1OSI pins on RC0/RC1) within 5 mm of the MCU with a grounded guard trace to minimize stray capacitance. For USB applications using the on-chip USB transceiver (not all PIC18F25J11 sub-variants support USB; check your die revision), the D+/D- traces must be 90-ohm differential and length-matched within 150 mil. Without length matching, USB Full-Speed eye-pattern compliance fails at certification.
合规信息
Industrial temperature grade only (-40C to +85C). For AEC-Q100 automotive applications, the PIC18F family K-series or PIC18F46J11-Q1 is recommended. RoHS compliance verified per Microchip product page.
