PIC18LF2525-I/SO - 8-bit 40MHz 48KB Flash MCU | Microchip
MPN: PIC18LF2525-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.88 | $48.80 |
| 100 | $4.35 | $435.00 |
| 500 | $3.92 | $1,960.00 |
| 1,000 | $3.51 | $3,510.00 |
PIC18LF2525-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (typically Flash), working RAM, peripherals (timers, ADC, communication interfaces), and I/O pins in one package. PIC18 microcontrollers use a Harvard-architecture RISC core with 16-bit-wide instructions and an 8-bit data path, balancing code density with deterministic interrupt latency. The 'LF' family sits within the broader 8-bit PIC taxonomy alongside 'F' (5V), 'LC' (low-power CMOS), and 'J' (3.3V with nanoWatt) variants.
Key features include 25 digital I/O pins, a 10-bit multi-channel analog-to-digital converter (ADC), enhanced USART, MSSP (SPI/I2C), two analog comparators, and Microchip's nanoWatt power-management technology with multiple idle/sleep modes. The 28-pin SOIC package supports industrial-grade -40C to +85C operation.
The PIC18LF2525 architecture uses a 16-bit instruction word with 8-bit data path, allowing single-cycle execution of most instructions at 40MHz (10 MIPS) with deterministic interrupt response - a hallmark of PIC microcontrollers in real-time control applications.
Typical applications include industrial control panels, sensor interfaces, low-power remote sensor nodes, USB-to-UART bridges when paired with an external USB transceiver, and consumer appliances where deterministic real-time response is required. The wide 2.0V-5.5V range simplifies battery-powered designs.
When designing with this MCU, note that the 'I' suffix indicates the industrial -40C to +85C temperature grade. For extended -40C to +125C operation, the 'E' grade must be selected. Brown-out detect and low-voltage programming configuration bits must be set appropriately for reliable Flash endurance.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on a single manufacturer or distributor product page.
Drop-in alternatives for PIC18LF2525-I/SO — 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 PIC18LF2525-I/SO (same form factor and footprint) — differing in ADC, Package, Timers, Core Architecture, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F2525-I/SO
✅ Drop-In✓ In Stock
$3.74 / Unit
View Datasheet →PIC18LF2520-I/SO
✅ Drop-In✓ In Stock
$4.47 / Unit
View Datasheet →PIC18LF2620-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF2525T-I/SO
✅ Drop-In✓ In Stock
$5.42 / Unit
View Datasheet →PIC18LF2525-I/SOVAO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF2525-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 RISC (Harvard) |
| Data Bus Width | 8 bit |
| Instruction Word Width | 16 bit |
| Maximum CPU Frequency | 40 MHz |
| MIPS (10 MIPS @ 40MHz) | 10 MIPS |
| Program Memory (Flash) | 48 KB (24K x 16 words) |
| Data RAM | 3968 bytes |
| Data EEPROM | 1024 bytes |
| I/O Pins | 25 |
| ADC | 10-bit, multi-channel |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| Package | 28-SOIC (SO) wide-body 300-mil |
| Mounting Type | Surface Mount |
| Communication Peripherals | EUSART, MSSP (SPI / I2C) |
| Comparators | 2 analog comparators |
| Power Management | nanoWatt technology (idle/sleep modes) |
| RoHS Status | Compliant |
PIC18LF2525-I/SO Pin Configuration
| Pin 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / PORTE bit 3 |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input / comparator 1 output |
| Pin 7 | RA5/AN4/SS/C2OUT — PORTA bit 5 / analog input 4 / SPI slave select / comparator 2 output |
| Pin 8 | OSC1/CLKI/RA7 — Oscillator input / external clock input / PORTA bit 7 |
| Pin 9 | OSC2/CLKO/RA6 — Oscillator output / clock output / PORTA bit 6 |
| Pin 10 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator output / Timer1/3 clock input |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / CCP1 module |
| Pin 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 16 | RC6/TX/CK — PORTC bit 6 / EUSART TX / EUSART clock |
| Pin 17 | RC7/RX/DT — PORTC bit 7 / EUSART RX / EUSART data |
| Pin 18 | RB0/INT0/FLT0 — PORTB bit 0 / external interrupt 0 / PWM fault input |
| Pin 19 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 20 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin 21 | RB3/CCP2 — PORTB bit 3 / CCP2 module (alt) |
| Pin 22 | RB4 — PORTB bit 4 |
| Pin 23 | RB5 — PORTB bit 5 |
| Pin 24 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 25 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 26 | VDD — Positive supply (2.0V to 5.5V) |
| Pin 27 | VSS — Ground reference |
| Pin 28 | NC — Not connected (28-SOIC SO package mechanical pin) |
Typical Applications
PIC18LF2525-I/SO is suitable for 7 applications: Industrial Control Panels, Battery-Powered Sensor Nodes, USB-to-UART Bridge, Consumer Appliance Control, Automotive Body Electronics (Non-Safety), Educational and Prototyping Platforms, Display and Keypad Interface Modules.
Industrial Control Panels
The PIC18LF2525-I/SO fits industrial control panel applications because of its 40MHz 8-bit RISC core (10 MIPS), 25 I/O lines, and 2.0V-5.5V supply range that tolerates noisy 24V-buck-derived rails. With 48KB Flash and 3968 bytes RAM, it runs control-loop firmware, HMI keyscan, and Modbus-style serial protocols without external memory. The 10-bit ADC and EUSART let one chip digitize analog sensor inputs and communicate with upstream PLCs. Pin-compatible with the PIC18F2525, it allows easy panel-voltage migration from 5V to 3.3V logic.
Recommended
Battery-Powered Sensor Nodes
The PIC18LF2525-I/SO suits battery-powered sensor nodes thanks to its nanoWatt power-management technology with multiple idle and sleep modes plus a wide 2.0V-5.5V supply window that lets it run directly from 2x AA cells down to 2.0V. The 10-bit ADC with multiple input channels reads temperature, light, or analog sensor outputs; the MSSP drives SPI/I2C digital sensors; the EUSART handles wireless-module links. Low sleep current preserves battery life across months of unattended operation, while 48KB Flash accommodates over-the-air firmware upgrade stacks.
Recommended
USB-to-UART Bridge
The PIC18LF2525-I/SO works as the host controller in a USB-to-UART bridge when paired with an external USB transceiver such as the MCP2200 or MCP2221. Its EUSART provides the UART side while the MCU manages USB enumeration, baud-rate negotiation, and protocol translation. 48KB Flash and 3968 bytes RAM are sufficient for CDC-class firmware with command parsers. The 2.0V-5.5V supply range matches USB bus-powered designs that must run from 3.3V or 5V without changing the BOM. The 28-SOIC package leaves room for firmware expansion.
Recommended
Consumer Appliance Control
The PIC18LF2525-I/SO serves consumer appliances such as coffee machines, washing-machine front panels, and small kitchen devices where 8-bit deterministic control is sufficient. The 10-bit ADC reads temperature, water-level, and humidity sensors; the PWM module drives motor or heater loads; the EUSART talks to display modules or Wi-Fi companion chips. Industrial -40C to +85C grade covers appliance thermal environments. The wide 2.0V-5.5V input range simplifies designs that must work on either rectified-5V or 3.3V rails. Pin-compatible drop-in upgrades (PIC18LF2620) let designers add features without PCB rework.
Recommended
Automotive Body Electronics (Non-Safety)
The PIC18LF2525-I/SO works in non-safety automotive body-electronics modules such as lighting controllers, seat-position memories, and HVAC blend-door actuators where an 8-bit MCU with LIN or UART connectivity is sufficient. Its -40C to +85C industrial temperature range covers cabin environments, and the 2.0V-5.5V supply window tolerates 12V-buck-derived rails with cold-crank dips. The 10-bit ADC reads potentiometers and current-sense amplifiers; the PWM module drives small motors and LEDs. For under-hood or AEC-Q100-mandated applications, the PIC18LF2525-I/SOVAO automotive variant is the qualified drop-in.
Recommended
Educational and Prototyping Platforms
The PIC18LF2525-I/SO is a common choice for university embedded-systems courses and hobbyist prototyping because of Microchip's free MPLAB X IDE, free XC8 C compiler, and inexpensive PICkit 5 debugger. Its 28-SOIC package is breadboard-compatible via breakout boards and exposes 25 I/O pins for student projects. 48KB Flash fits typical course assignments involving ADC sampling, PWM motor control, and serial communication labs. The wide 2.0V-5.5V supply lets students power prototypes from USB or 3.3V regulator boards without redesign. The PIC18 family documentation and application notes are among the most extensive in the 8-bit MCU ecosystem.
Recommended
Display and Keypad Interface Modules
The PIC18LF2525-I/SO drives character-LCD or small graphic-LCD panels in vending machines, kiosks, and instrument clusters by combining its 25 I/O pins with SPI-based display peripherals. The MSSP module streams pixel data to OLED or character LCDs while the EUSART talks to upstream master controllers. 48KB Flash holds font tables and menu state machines for human-machine-interface code. The 10-bit ADC reads keypad voltage-divider networks, eliminating dedicated keypad-scan ASICs. The 2.0V-5.5V supply window supports both 3.3V OLEDs and 5V character LCDs with no firmware change.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF2525-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F2525-I/SO | PIC18LF2520-I/SO | PIC18LF2620-I/SO | PIC18LF2525T-I/SO | PIC18LF2525-I/SOVAO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Flash Program Memory | 48 KB | 48 KB - same | 32 KB (-33%) | 64 KB (+33%) | 48 KB - same | 48 KB - same |
| Data RAM | 3968 bytes | 3968 bytes - same | 1536 bytes (-61%) | 3968 bytes - same | 3968 bytes - same | 3968 bytes - same |
| Data EEPROM | 1024 bytes | 1024 bytes - same | 256 bytes (-75%) | 1024 bytes - same | 1024 bytes - same | 1024 bytes - same |
| Operating Voltage Range | 2.0 V to 5.5 V | 4.2 V to 5.5 V (no LF) | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same |
| Maximum CPU Frequency | 40 MHz | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same |
| I/O Pins | 25 | 25 - same | 25 - same | 25 - same | 25 - same | 25 - same |
| Automotive Grade | No (industrial) | No (industrial) | No (industrial) | No (industrial) | No (industrial) | Yes (VAO automotive suffix) |
Key Differentiators
- Wide 2.0V-5.5V operating voltage window with same firmware as 5V-only variant (vs PIC18F2525-I/SO)
- Larger Flash headroom for firmware expansion vs same-pinout 2520 family member (vs PIC18LF2520-I/SO)
- Industrial temperature grade with same die as automotive VAO variant (vs PIC18LF2525-I/SOVAO)
Design Notes
Estimated: at 40MHz and 5.0V supply, the PIC18LF2525 core draws roughly 10-15 mA active; nanoWatt sleep modes drop quiescent current to single-digit microamps. For battery designs, gate peripheral power via the MCU's peripheral-disable registers and use the deepest sleep mode that still allows wake-up from the chosen interrupt source. Always enable the brown-out detect (BOR) configuration bit so the MCU resets cleanly when VDD droops below the BOR threshold, preventing Flash corruption during supply collapse.
Place a 100nF decoupling capacitor within 5mm of the VDD pin (pin 26) and a bulk 1uF-10uF capacitor on the same VDD net. For ADC accuracy, add a small RC filter (100 ohm + 100nF) on each analog input trace to suppress digital switching noise. Route the ICSP lines (RB6/PGC, RB7/PGD) to a dedicated header that is not shared with high-current switching nodes; otherwise in-circuit programming may fail in-circuit during motor or relay switching.
Do not assume the PIC18LF2525 and PIC18F2525 share identical config-bit defaults - the LF part supports a wider VDD range and may require different BOR and LVP settings. Avoid leaving unused I/O pins floating; configure them as outputs or enable the internal weak pull-ups to minimize sleep current and EMI. When migrating from PIC18F2525 to PIC18LF2525 firmware, ensure the ADC acquisition time is still valid at the new lower VDD - slow it down if the clock prescaler requires it.
Keep the crystal or resonator within 10mm of the OSC1/OSC2 pins (pins 8 and 9) and surround the oscillator traces with a ground guard ring to attenuate radiated emissions. The MCLR line (pin 1) should have a 10k pull-up to VDD and a 100nF cap to ground for noise immunity; never route MCLR near switching nodes or the ICSP header's PGC/PGD will couple glitches into the reset line.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free reflow profile per JEDEC J-STD-020. Not AEC-Q100 qualified - choose PIC18LF2525-I/SOVAO for automotive. Halogen-free status not stated on the verified distributor pages.
