PIC18F25J11-I/SS - 8-bit 48MHz 32KB Flash MCU 28-SSOP | Microchip
MPN: PIC18F25J11-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.52 | $25.20 |
| 100 | $2.18 | $218.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.74 | $1,740.00 |
PIC18F25J11-I/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, Flash program memory, and peripherals (ADC, timers, communication ports) into one IC. In the broader taxonomy, the PIC18F25J11 belongs to the hierarchy: microcontroller -> 8-bit MCU -> PIC18 family -> PIC18 J-series -> XLP nanoWatt XLP extreme low power sub-family. The J-series is Microchip's low-power, high-performance branch of the PIC18 line, designed to bring 16 MIPS throughput to portable and battery-driven applications while keeping active current draw in the milliamp range.
Key features include Peripheral Pin Select (PPS), which allows remapping of digital peripherals to any I/O pin, dramatically simplifying PCB layout; nanoWatt XLP technology with deep-sleep currents measured in nanoamps; and on-chip 2.5V and 3.3V voltage regulator options that allow single-rail 2.5-3.6V operation or 5V (4.2-5.5V) operation depending on the configuration. The device also integrates multiple communication peripherals (EUSART, SPI, I2C), comparators, PWM modules, and a CTMU for capacitive touch sensing. The 28-SSOP form factor keeps the design surface-mount and compact, suitable for both hand-soldered prototypes and high-volume SMT assembly.
Technically, the PIC18F25J11 combines the classic PIC18 instruction set with enhanced peripherals such as the RTCC (Real-Time Clock/Calendar) and extended watchdog timer. The PPS subsystem distinguishes the J-series from earlier PIC18F devices, where peripheral-to-pin mapping was hard-wired. Designers moving from older PIC18F parts gain significant board-routing flexibility, often eliminating the need for trace-layer changes when relocating peripherals.
Typical applications include USB Human Interface Devices (HID) such as keyboards and mice, low-power sensor nodes with battery or energy-harvesting supplies, industrial control front-ends, consumer appliances with capacitive touch panels, and portable medical peripherals where nanoWatt XLP deep-sleep currents extend battery life into the year range. The wide operating voltage window (2.0-3.6V F-core / 4.2-5.5V HF-core) lets the same part serve both 3.3V and 5V rails.
When designing with this MCU, pay close attention to the configuration bits that select between 2.5V regulator mode (F-core, 2.0-3.6V) and 5V regulator mode (HF-core, 4.2-5.5V). Choosing the wrong mode will prevent the part from running reliably at the intended rail. Also reserve adequate Flash endurance budget; PIC18F25J11 Flash is rated for a minimum of 10,000 erase/write cycles per block.
Drop-in alternatives for PIC18F25J11-I/SS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18F25J11-I/SS (same form factor and footprint) — differing in Operating Temperature, Package, Timers, Program Memory (Flash), Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F26J11-I/SS
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC18F24J11-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F25J11-I/SP
✅ Drop-In✓ In Stock
$3.15 / Unit
View Datasheet →PIC18F24J10-I/SS
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC18F24K50T-I/SS
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →PIC18F25J11-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Family | PIC18 J-series (XLP nanoWatt) |
| Maximum CPU Speed | 48 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 3.8 KB (3.8K x 8) |
| I/O Pins | 25 |
| ADC | 10-bit, up to 10 channels |
| Supply Voltage (F-core / 3.3V reg) | 2.0 V to 3.6 V |
| Supply Voltage (HF-core / 5V reg) | 4.2 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial, -I) |
| Package | 28-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| Peripheral Pin Select (PPS) | Yes |
| Communication | EUSART, SPI, I2C |
| Timers | 4 x 8/16-bit, RTCC |
| PWM Channels | Up to 4 |
| Comparators | 2 |
| CTMU (Capacitive Touch) | Yes |
| RoHS Status | Compliant |
PIC18F25J11-I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 / analog input AN0 / RP0 capable |
| Pin 3 | RA1 — Port A bit 1 / analog input AN1 / RP1 capable |
| Pin 4 | RA2 — Port A bit 2 / analog input AN2 / RP2 capable |
| Pin 5 | RA3 — Port A bit 3 / analog input AN3 / VREF+ capable |
| Pin 6 | RA4 — Port A bit 4 / analog input AN4 |
| Pin 7 | RA5 — Port A bit 5 / analog input AN5 / VREF- |
| Pin 8 | VDD — Positive supply (2.0-3.6V or 4.2-5.5V per config) |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RA7 — Port A bit 7 / OSC1 |
| Pin 11 | RA6 — Port A bit 6 / OSC2 |
| Pin 12 | RC0 — Port C bit 0 / analog AN12 |
| Pin 13 | RC1 — Port C bit 1 / analog AN13 |
| Pin 14 | RC2 — Port C bit 2 / analog AN14 / RP14 capable |
| Pin 15 | RC3 — Port C bit 3 / analog AN15 / RP15 capable |
| Pin 16 | RC4 — Port C bit 4 / D-/DN-/RP16 capable |
| Pin 17 | RC5 — Port C bit 5 / D+/RP17 capable |
| Pin 18 | RC6 — Port C bit 6 / RP18 capable |
| Pin 19 | RC7 — Port C bit 7 / RP19 capable |
| Pin 20 | VSS — Ground reference (second VSS) |
| Pin 21 | RB0 — Port B bit 0 / RP3 capable |
| Pin 22 | RB1 — Port B bit 1 / RP4 capable |
| Pin 23 | RB2 — Port B bit 2 / RP5 capable |
| Pin 24 | RB3 — Port B bit 3 / RP6 capable |
| Pin 25 | RB4 — Port B bit 4 / RP7 capable |
| Pin 26 | RB5 — Port B bit 5 / RP8 capable |
| Pin 27 | RB6 — Port B bit 6 / RP9 capable / ICS PGC |
| Pin 28 | RB7 — Port B bit 7 / RP10 capable / ICS PGD |
Typical Applications
PIC18F25J11-I/SS is suitable for 6 applications: USB HID Device Firmware, Battery-Powered Sensor Node, Capacitive Touch User Interface, Industrial Control Front-End, Consumer Appliance Control Board, Portable Medical Peripheral.
USB HID Device Firmware
The PIC18F25J11-I/SS runs Microchip's USB Full-Speed device stack from its 32 KB Flash and 3.8 KB RAM, sufficient to host HID class descriptors, report buffers, and application logic for keyboards, mice, and game controllers. The on-chip USB 2.0 SIE handles packet framing in hardware, freeing the 16 MIPS core for HID report processing. PPS lets you route the USB D+/D- lines and interrupt pins independently, simplifying board layout when connectors and MCU must be physically separated. Compared to discrete USB-interface solutions, this PIC integrates both USB and the application MCU, saving BOM cost and PCB area. Power is typically drawn from the USB VBUS rail at 5V through the internal 3.3V regulator, keeping external components to a minimum. Engineers should reserve at least 4 KB of Flash for the stack, leaving 28 KB for user code.
Recommended
Battery-Powered Sensor Node
The PIC18F25J11-I/SS's nanoWatt XLP deep-sleep mode reduces quiescent current into the nanoamp range, allowing coin-cell-powered sensor nodes to operate for years without battery replacement. The 10-bit ADC with up to 10 channels handles temperature, light, and voltage sensing directly, while the RTCC provides accurate wake-up timing without an external RTC chip. The wide 2.0-3.6V supply range is compatible with single lithium or dual-AA chemistries. PPS flexibility simplifies the sensor-to-pin mapping during board revisions. At 16 MIPS active throughput, the MCU can run periodic measurements, store them in 3.8 KB RAM, and return to sleep before battery capacity is materially impacted. Compared with discrete sensor-interface designs, this PIC eliminates an external ADC and RTC IC, reducing BOM cost.
Recommended
Capacitive Touch User Interface
The PIC18F25J11-I/SS integrates Microchip's CTMU (Charge Time Measurement Unit) for capacitive touch sensing, eliminating the need for an external touch controller IC. The CTMU works with the 10-bit ADC to measure capacitance changes from a few femtofarads, supporting touch buttons, sliders, and proximity sensors through standard PCB traces. The 25 I/O pins allow up to 25 touch channels when properly multiplexed. PPS lets designers route touch-sense traces away from noisy digital lines, improving EMI immunity. Typical applications include white-good control panels, audio mixers, and dimmer switches. Compared with dedicated touch-IC solutions, integrating the touch engine in the MCU cuts board cost by 30-50% and simplifies firmware development through Microchip's mTouch library.
Recommended
Industrial Control Front-End
The PIC18F25J11-I/SS serves as a low-cost digital front-end for industrial sensors and actuators, with 25 I/O pins enough to drive relays, read switches, and interface with 4-20 mA loops through external conditioning. The -40C to +85C industrial temperature range covers most factory environments. EUSART enables RS-232/RS-485 communication with PLCs or HMIs, while SPI and I2C support display and EEPROM peripherals. PPS simplifies routing of communication lines away from switching noise sources. At 16 MIPS, the core executes PID loops and Modbus protocols with headroom. Compared with larger 32-bit MCUs, the PIC18F25J11 reduces BOM cost for simple loop-control tasks while meeting industrial temperature requirements.
Recommended
Consumer Appliance Control Board
The PIC18F25J11-I/SS fits white-good and small-appliance controllers (coffee machines, microwave ovens, washing machines) where 32 KB Flash hosts user-interface state machines, fault logging, and communication stacks. The 10-bit ADC reads thermistors, water-level sensors, and keypad matrices; the PWM channels drive valves, heaters, and indicator LEDs. nanoWatt XLP standby modes cut standby power to meet Energy Star and EU ecodesign requirements. The 5V supply mode (4.2-5.5V) is compatible with rectified mains-derived rails common in appliances. PPS flexibility means PCB layout can be optimized for high-voltage isolation zones, with low-voltage signals placed on the opposite side of the board. Compared with logic-only controllers, integrating ADC and PWM in one IC saves $0.50-$1.00 BOM.
Recommended
Portable Medical Peripheral
The PIC18F25J11-I/SS powers handheld medical peripherals such as glucose meters, pulse oximeters, and spirometers where battery life and measurement accuracy are critical. nanoWatt XLP deep-sleep mode extends battery life between measurements, while the 10-bit ADC handles analog sensor signals with adequate resolution for trend monitoring. The 32 KB Flash stores calibration tables, lookup curves, and UI state machines. EUSART and I2C support wired communication with host equipment or wireless modules. The industrial -I temperature grade covers typical clinical environments. Compared with discrete analog designs, integrating MCU and ADC in one chip reduces board area and BOM, critical for compact handheld form factors. Note that FDA-regulated devices may require additional qualification beyond standard commercial parts.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F25J11-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F26J11-I/SS | PIC18F24J11-I/SS | PIC18F25J11-I/SP | PIC18F24J10-I/SS | PIC18F24K50T-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-28 | SSOP-28 (same) | SSOP-28 (same) | SPDIP-28 (through-hole) | SSOP-28 (same) | SSOP-28 (same) |
| Flash Memory | 32 KB | 64 KB | 16 KB | 32 KB | 16 KB | 16 KB |
| RAM | 3.8 KB | 3.8 KB | 3.6 KB | 3.8 KB | 3.6 KB | 1.5 KB |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | No | Yes |
| USB Peripheral | Yes (FS Device) | Yes (FS Device) | Yes (FS Device) | Yes (FS Device) | Yes (FS Device) | Yes (FS Device + transceiver) |
| Supply Voltage | 2.0-3.6V or 4.2-5.5V | 2.0-3.6V or 4.2-5.5V | 2.0-3.6V or 4.2-5.5V | 2.0-3.6V or 4.2-5.5V | 2.0-3.6V or 4.2-5.5V | 1.8-3.6V |
Key Differentiators
- Peripheral Pin Select (PPS) for flexible PCB routing (vs PIC18F24J10-I/SS)
- Doubled Flash vs PIC18F24J11 (vs PIC18F24J11-I/SS)
- J-series nanoWatt XLP deep-sleep currents (vs PIC18F24K50T-I/SS)
Design Notes
Select the correct voltage-regulator configuration bit before programming. The PIC18F25J11 supports two configurations: F-core (2.5V internal regulator active, supply 2.0-3.6V) and HF-core (3.3V internal regulator active, supply 4.2-5.5V). Choosing HF-core with a 3.3V supply or F-core with a 5V supply prevents reliable operation. Brown-out reset (BOR) thresholds must also be configured to match the chosen supply range to avoid spurious resets during brown-out events. Place a 10 uF bulk capacitor plus 100 nF decoupling cap close to each VDD/VSS pin pair.
Use Peripheral Pin Select (PPS) strategically to keep high-speed digital lines (SPI, PWM, UART) physically separated from analog inputs. Route analog signals away from digital switching traces, and place the analog AVSS/AVDD pair on a quiet island. The 28-SSOP body is 5.30 mm wide; allow at least 0.20 mm trace clearance between pins. Connect all VSS pins to a single ground plane with vias stitched every 5 mm to reduce return-path impedance at 48 MHz.
Do not assume the J10 and J11 are interchangeable. The PIC18F25J10 lacks Peripheral Pin Select, so any firmware relying on PPS remapping will fail on the J10 even though the pin count and package match. Also, do not exceed 32 KB of compiled code on this part; the device has no boot-block overflow mechanism. Use a unique configuration bit pattern and lock the part with the appropriate CONFIG settings if your application requires code protection. Programming via ICSP requires RB6/RB7 to be free for PGC/PGD.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified (industrial -40C to +85C only); for automotive applications use PIC18F25K22-I/SS or similar AEC-Q100 part. Reach SVHC declaration maintained on Microchip environmental compliance portal.
