PIC18LF2515-I/SO - 40MHz 8-bit MCU, 48KB Flash | Microchip
MPN: PIC18LF2515-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $10.38 | $10.38 |
| 10 | $9.3 | $93.00 |
| 100 | $8.2 | $820.00 |
| 500 | $7.3 | $3,650.00 |
| 1,000 | $6.55 | $6,550.00 |
PIC18LF2515-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, working RAM, non-volatile storage and a rich set of digital and analog peripherals. PIC18F devices sit in Microchip's 8-bit mid-range family between the baseline PIC10/16 and the 16-bit dsPIC/PIC24 families, and are widely used where deterministic low-power control is more important than raw computational throughput. The "LF" suffix indicates a wide-voltage part that runs from 2.0 V to 5.5 V (per Microchip PIC18F2x1x/4x1x datasheet DS39606), while the plain PIC18F2515 is a 4.2 V to 5.5 V part. The "I" suffix denotes the industrial -40C to +85C operating range.
Key features include nanoWatt Technology for ultra-low-power sleep modes, HLVD (High/Low Voltage Detect), Brown-out Reset (BOR), Power-on Reset (POR), a Watchdog Timer (WDT), I2C, an EUSART (addressable USART) and a master SPI port. In-System Programming (ICSP) is supported, allowing firmware updates without removing the MCU from the board, and the 28-pin SOIC-300-mil package gives enough pin count for keypad, LCD or motor-control front-ends while still hand-solderable.
Architecturally, the PIC18F2515 uses an 8-bit data path with a 16-bit instruction word and a hardware 8x8 multiply, achieving up to 10 MIPS at 40 MHz. The 10-bit ADC can run with an internal RC reference, and the nanoWatt Technology modes reduce quiescent current to single-digit uA in sleep. Compared with older PIC16F parts, the PIC18F core adds linear memory, software-controlled interrupt priorities, and C-friendly pointer architecture, making it a strong fit for legacy firmware ports.
Typical applications include industrial control panels, low-cost sensor hubs, building automation, USB-less human-interface boards, small appliance controllers, and educational/embedded learning kits. It is also a popular fit for migrating older PIC16F designs where more code space and a richer peripheral set are needed without leaving the 8-bit PIC toolchain.
When designing with the PIC18LF2515-I/SO, verify Vdd decoupling with 100 nF + 10 uF near the supply pins and respect the 5.5 V absolute-maximum rating on the LF part when using an external analog reference. For MPLAB X IDE, select the PIC18F2515 toolchain and configure the configuration bits for the LF voltage range, oscillator mode and BOR-disabled table for in-system programming over ICSP. This page consolidates distributor pricing, drop-in 28-SOIC alternatives, and engineering design notes not always covered in the manufacturer datasheet.
Drop-in alternatives for PIC18LF2515-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 PIC18LF2515-I/SO (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF2515T-I/SO
✅ Drop-In✓ In Stock
$4.55 / Unit
View Datasheet →PIC18F2515-I/SO
✅ Drop-In✓ In Stock
$4.32 / Unit
View Datasheet →PIC18F2515T-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.45 / Unit
View Datasheet →PIC18LF2510-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF2510T-I/SO
✅ Drop-In✓ In Stock
$3.3 / Unit
View Datasheet →PIC18LF2610-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.78 / Unit
View Datasheet →PIC18LF2515-I/SO Maximum Ratings & Electrical Characteristics
| Core Processor | PIC |
| Core Size | 8-bit |
| Series | PIC 18F |
| Maximum CPU Speed | 40 MHz |
| Program Memory Size | 48 KB (24K x 16) FLASH |
| RAM Size | 1.5 KB (1536 bytes) |
| Operating Voltage Range | 2.0 V to 5.5 V (LF variant) |
| I/O Pins | 25 |
| ADC | 10-bit, up to 11 channels |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, HLVD, POR, PWM, WDT |
| PWM / CCP | 2 CCP modules, one with Auto-Shutdown |
| Package | 28-SOIC (0.295", 7.50 mm width), Tube |
| Operating Temperature | -40C to +85C (I grade) |
| Mounting Type | Surface Mount |
| In-System Programming | ICSP supported |
| Low-Power Feature | nanoWatt Technology |
PIC18LF2515-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 channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input channel 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input channel 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / Analog input channel 4 / SPI Slave Select |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/RA7 — Crystal oscillator input / PORTA bit 7 |
| Pin 10 | OSC2/RA6 — Crystal oscillator output / PORTA bit 6 |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 PWM output |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output (with Auto-Shutdown) |
| Pin 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — PORTC bit 6 / EUSART async transmit / EUSART sync clock |
| Pin 18 | RC7/RX/DT — PORTC bit 7 / EUSART async receive / EUSART sync data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply (2.0 V to 5.5 V on LF variant) |
| Pin 21 | RB0/INT0/FLT0 — PORTB bit 0 / External interrupt 0 / PWM fault input |
| Pin 22 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin 23 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pin 24 | RB3/INT3/CCP2 — PORTB bit 3 / External interrupt 3 / alternate CCP2 |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5/PGM — PORTB bit 5 / ICSP programming |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18LF2515-I/SO is suitable for 6 applications: Industrial Control Panels, Low-Cost Sensor Hubs, Building Automation Controllers, Small Appliance Controllers, Educational / Embedded Learning Kits, Legacy 16F to 18F Migration.
Industrial Control Panels
The PIC18LF2515-I/SO's 48 KB flash, 10-bit ADC and dual CCP PWM modules make it well suited to industrial control panels where deterministic 8-bit timing is more important than raw computational throughput. Its 2.0 V to 5.5 V wide-voltage range lets the same design run from 24 V industrial rails stepped down to 3.3 V or 5 V, and nanoWatt Technology lowers sleep current below 100 nA for battery-backed panels. The 28-SOIC-300-mil body is hand-solderable, simplifying field repair, while ICSP supports in-system firmware updates without removing the MCU. Designers typically pair it with an external RS-485 driver on the EUSART for industrial-bus connectivity.
Recommended
Low-Cost Sensor Hubs
With 25 I/O pins and up to 11 channels of 10-bit ADC, the PIC18LF2515-I/SO can directly digitize multiple analog sensors (temperature, light, pressure, potentiometers) without an external multiplexer. The 1.5 KB RAM supports modest averaging and digital-filter algorithms, while 48 KB of flash is more than enough for sensor calibration tables and protocol stacks like Modbus RTU over the EUSART. Operating from 2.0 V to 5.5 V means the same PCB can accept a 3.3 V regulated supply or a 2xAA alkaline pack, simplifying power architecture for low-cost sensor hubs.
Recommended
Building Automation Controllers
Building-automation subsystems (HVAC dampers, blinds, lighting keypads, smart thermostats) benefit from the PIC18LF2515-I/SO's low sleep current, robust -40C to +85C industrial range and dual Capture/Compare/PWM modules. One CCP drives a TRIAC phase-control or MOSFET dimmer, while the second handles DC motor speed or fan RPM feedback. ICSP allows on-site firmware upgrade during commissioning, and the 28-SOIC-300-mil package is large enough for hand rework on legacy panels. nanoWatt Technology lets battery-backed wireless modules idle for years between service intervals.
Recommended
Small Appliance Controllers
Coffee machines, induction cooktops, washing-machine control boards and microwave user interfaces all fit comfortably in the PIC18LF2515-I/SO's 48 KB flash and 1.5 KB RAM. The 10-bit ADC reads temperature sensors and potentiometers, the two CCP modules drive TRIACs or IGBTs via optocouplers, and the UART/USART connects to a BLE or Wi-Fi coprocessor for app connectivity. Wide 2.0-5.5 V operation simplifies power-supply design across global mains variants.
Recommended
Educational / Embedded Learning Kits
The PIC18LF2515-I/SO is a long-standing Microchip PIC18 platform, supported by MPLAB X IDE, XC8 compiler and the free PICkit programmer ecosystem. 48 KB of flash is large enough for classroom projects that demonstrate A/D conversion, PWM motor control, I2C peripheral access and serial communication, while the 28-SOIC footprint is easier to handle in a breadboard-adapter than smaller QFN parts. Universities and trainers value the LF's wide VDD range because the same board can be powered from a USB 5 V supply or a 3.3 V bench rail without modification.
Recommended
Legacy 16F to 18F Migration
Designers moving from PIC16F to PIC18F code often pick the PIC18LF2515-I/SO as the migration target because the 28-SOIC package is shared with several PIC16F25x/26x devices and the PIC18 core adds linear memory, C-friendly pointers and prioritized interrupts. Existing PIC16F code can be ported with minimal restructuring, and 48 KB of flash is large enough to host both legacy assembly stubs and new C code side by side. ICSP and the same MPLAB X toolchain avoid any rework of the development workflow.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF2515-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF2515T-I/SO | PIC18F2515-I/SO | PIC18F2515T-I/SO | PIC18LF2510-I/SO | PIC18LF2510T-I/SO | PIC18LF2610-I/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (0.295") | 28-SOIC (0.295") - same | 28-SOIC (0.295") - same | 28-SOIC (0.295") - same | 28-SOIC (0.295") - same | 28-SOIC (0.295") - same | 28-SOIC (0.295") - same |
| Program Flash | 48 KB | 48 KB | 48 KB | 48 KB | 32 KB (-33%) | 32 KB (-33%) | 64 KB (+33%) |
| RAM | 1.5 KB | 1.5 KB | 1.5 KB | 1.5 KB | 1.5 KB | 1.5 KB | 1.5 KB |
| Operating Voltage | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (narrower) | 4.2 V to 5.5 V (narrower) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| ADC Channels | 11 channels, 10-bit | 11 channels, 10-bit | 11 channels, 10-bit | 11 channels, 10-bit | 11 channels, 10-bit | 11 channels, 10-bit | 11 channels, 10-bit |
| CCP / PWM | 2 CCPs (Auto-Shutdown) | 2 CCPs (Auto-Shutdown) | 2 CCPs (Auto-Shutdown) | 2 CCPs (Auto-Shutdown) | 2 CCPs (Auto-Shutdown) | 2 CCPs (Auto-Shutdown) | 2 CCPs (Auto-Shutdown) |
Key Differentiators
- Wide-voltage LF grade at the same price tier as the standard F part (vs PIC18F2515-I/SO)
- Drop-in alternative with smaller flash for tight-cost designs (vs PIC18LF2510-I/SO)
- Larger-flash sibling for firmware headroom (vs PIC18LF2610-I/SO)
Design Notes
Estimated: at Vdd=5.0 V, 40 MHz CPU, all peripherals enabled, the PIC18LF2515-I/SO draws roughly 15-20 mA active and under 1 uA in sleep. Decouple Vdd (pin 20) and Vss (pins 8 and 19) with 100 nF ceramic + 10 uF tantalum placed within 5 mm of the package, and add a ferrite bead if analog and digital Vdd branches share a regulator. Brown-out Reset (BOR) and Power-on Reset (POR) should be enabled in the CONFIG words to protect flash from partial writes during supply dips below 2.0 V.
Keep the 28-SOIC-300-mil SOIC-28 layout identical across the PIC18LF2515/2510/2610 family so that BOM swaps do not require a re-spin. Route the ICSP lines (RB6/PGC, RB7/PGD, MCLR/VPP) as a 3-pin header on the board edge for PICkit 3/4 or MPLAB Snap ICD access; leave the MCLR pull-up (typically 10 kohm to Vdd) in place so the device can also self-run. Avoid long parallel runs to the 25 MHz crystal traces to prevent injection into the ADC reference.
Do not exceed the 5.5 V Vdd absolute maximum even on the LF grade - it is wide-voltage but not high-voltage. The ADC VREF+ pin (RA3) has its own input voltage limit; tie it to Vdd through a 1 kohm resistor plus a 100 nF cap if an external reference is not needed. Configuration bits for the LF voltage range (LF parts must use the LF configuration words) must be set before code execution, otherwise the device may behave unpredictably at 2.0-4.2 V.
Compliance Information
RoHS and REACH compliance per Microchip product page; AEC-Q100 not qualified - choose PIC18F/K AEC-Q100 parts for automotive.
