PIC18LF24J11T-I/SO - 16KB Flash 8-bit MCU 28-SOIC | Microchip
MPN: PIC18LF24J11T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.78 | $278.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.15 | $2,150.00 |
| 1,600 | $1.95 | $3,120.00 |
PIC18LF24J11T-I/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, Flash program memory, RAM data memory, and integrated peripherals such as ADC, timers, and communication interfaces. The PIC18 family uses a RISC-based Harvard architecture with a 16-bit instruction word and 8-bit data path, falling within the broader hierarchy of microcontroller -> embedded processor -> semiconductor IC. The 18J sub-family adds a 2.5V internal regulator rail and nanoWatt XLP power management for sleep currents below 100 nA typical.
Key features of the PIC18LF24J11 include 16KB (8K x 16) self-programmable Flash, 4KB SRAM, 256B EEPROM-style data storage, an integrated 10-channel 10-bit ADC, two analog comparators, two USART, SPI, I2C, and two CCP/ECCP modules. The device also provides up to 21 digital I/O lines, four timers, and a 16-bit wide instruction path for compact C-code generation.
The PIC18LF24J11 uses the enhanced mid-range core with hardware multiply, 32-level stack, and an internal 31 kHz to 8 MHz RC oscillator with PLL. nanoWatt XLP modes include Sleep, Idle, and Doze, allowing the core current to drop to <100 nA in RTCC-based Sleep with full RAM retention.
Typical applications include battery-powered sensor nodes, wearables, remote controls, smart meters, USB HID/Human Interface Devices, and low-power industrial controllers. The wide supply range down to 2.0V supports single-cell lithium or two-AA battery designs, while the high 48MHz performance enables real-time control loops.
When designing with the PIC18LF24J11T-I/SO, verify the SOIC-28 (0.295" / 7.50mm wide) footprint against your PCB library, as Microchip ships the same silicon in SOIC-28, QFN-28 (ML), and SPDIP-28 (SP) packages. Use MPLAB X IDE with the XC8 compiler and the PICkit 4 or Snap programmer for development.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18LF24J11T-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 PIC18LF24J11T-I/SO (same form factor and footprint) — differing in I/O Pins, Package, ADC, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF24J11-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF24J10T-I/SO
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC18LF24J10-I/SO
✅ Drop-In✓ In Stock
$1.91 / Unit
View Datasheet →PIC18LF2420T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF2455T-I/SO
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →PIC18LF2431T-I/SO
✅ Drop-In✓ In Stock
$2.84 / Unit
View Datasheet →PIC18LF24J11T-I/SO Maximum Ratings & Electrical Characteristics
| Product Family | PIC18 J-Series (PIC18LF24J11) |
| Core Architecture | Enhanced mid-range 8-bit RISC, 16-bit instruction word |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data SRAM | 4 KB |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| Operating Voltage Range | 2.0 V to 3.6 V |
| I/O Pins | 21 |
| ADC | 10-bit, 10 channels |
| Analog Comparators | 2 |
| Communication Interfaces | 2x UART, SPI, I2C x2 |
| Timers | 4 (Timer0/1/2/3) |
| Capture/Compare/PWM | 2 CCP + 1 ECCP |
| Package | SOIC-28 (0.295 inch / 7.50 mm width) |
| Operating Temperature | -40C to +85C (Industrial) |
| nanoWatt XLP Sleep Current | <100 nA typical (RTCC mode) |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Lead-free, RoHS compliant |
| MSL Level | 1 |
| Programming Support | MPLAB X IDE, PICkit 4, Snap |
PIC18LF24J11T-I/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, internal pull-up |
| Pin 2 | RA0 — Digital I/O / AN0 / ULPWU |
| Pin 3 | RA1 — Digital I/O / AN1 |
| Pin 4 | RA2 — Digital I/O / AN2 / VREF- |
| Pin 5 | RA3 — Digital I/O / AN3 / VREF+ |
| Pin 6 | RA4 — Digital I/O / T0CKI |
| Pin 7 | RA5 — Digital I/O / AN4 / SS1 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1 — Crystal/Resonator input or external clock |
| Pin 10 | OSC2 — Crystal/Resonator output |
| Pin 11 | VDD — Positive supply (2.0V-3.6V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RB0 — Digital I/O / INT0 / AN12 |
| Pin 14 | RB1 — Digital I/O / INT1 / AN10 |
| Pin 15 | RB2 — Digital I/O / INT2 / AN8 |
| Pin 16 | RB3 — Digital I/O / INT3 / AN9 / CCP2 |
| Pin 17 | RB4 — Digital I/O / KBI0 / AN11 |
| Pin 18 | RB5 — Digital I/O / KBI1 / CCP3 / ECCP2 |
| Pin 19 | RB6 — Digital I/O / KBI2 / PGC (ICSP clock) |
| Pin 20 | RB7 — Digital I/O / KBI3 / PGD (ICSP data) |
| Pin 21 | RC0 — Digital I/O / SOSCO |
| Pin 22 | RC1 — Digital I/O / SOSCI / CCP2 |
| Pin 23 | RC2 — Digital I/O / CCP1 / T1CKI |
| Pin 24 | RC3 — Digital I/O / SCL1 / SCK1 |
| Pin 25 | RC4 — Digital I/O / SDA1 / SDI1 |
| Pin 26 | RC5 — Digital I/O / SDO1 |
| Pin 27 | RC6 — Digital I/O / TX1 / CK1 / CCP3 |
| Pin 28 | RC7 — Digital I/O / RX1 / DT1 / CCP4 |
Typical Applications
PIC18LF24J11T-I/SO is suitable for 6 applications: Battery-Powered Sensor Node, USB HID Human Interface Device, Smart Meter Data Logger, Remote Control / IR Transmitter, Low-Power Industrial Sensor / 4-20 mA Loop, Wearable Fitness / Health Band.
Battery-Powered Sensor Node
The PIC18LF24J11T-I/SO is well-suited for battery-powered wireless sensor nodes because of its nanoWatt XLP technology platform, which delivers typical sleep currents below 100 nA in RTCC mode while maintaining full 4 KB RAM retention. Operating from 2.0 V to 3.6 V, the device runs directly from a single CR2032 coin cell or two-AA battery stack without external regulation. The integrated 10-channel 10-bit ADC handles temperature, humidity, and battery voltage monitoring without an external analog front-end, while the 2 UART, 2 I2C, and SPI interfaces accommodate radio modules such as the MRF89XA sub-GHz transceiver or the RN4870 BLE module. At 48 MHz / 12 MIPS the core can service sensor fusion algorithms within tight duty-cycle windows, and the active-high enable on the internal LDO enables sequenced peripheral power-gating for further energy savings.
Recommended
USB HID Human Interface Device
For USB HID devices such as keyboards, mice, custom input controllers, and gaming peripherals, the PIC18LF24J11T-I/SO's 48 MHz core handles HID descriptor parsing, debounce, and matrix scanning in real time. The 4 KB SRAM accommodates HID report buffers and ring-scan tables for matrices up to 8x16. While this silicon does not integrate a USB PHY (use PIC18F2455/2550 for full USB), it can drive a USB-UART bridge with the on-chip EUSART, or act as the protocol engine with an external MCP2200 bridge. The industrial -40C to +85C temperature range and nanoWatt XLP support sleep modes when the host suspends the bus. Designers should budget ~1.5 KB of Flash for the HID stack and ~500 B for matrix scanning.
Recommended
Smart Meter Data Logger
The PIC18LF24J11T-I/SO fits smart electricity/water/gas meter data-logging applications by combining 256 B of EEPROM for non-volatile parameter storage (calibration constants, tariff tables, cumulative register readings) with 4 KB SRAM for time-series buffering. The 16-bit Timer1 with external 32.768 kHz crystal option supports a real-time clock (RTCC) that survives main power loss via the VBAT pin, while the 10-bit ADC reads pulse-output metering transducers. According to Microchip's smart-metering reference design, the XLP sleep mode keeps quiescent current below 1 uA when the meter is in standby, and the 2.0 V minimum VDD allows operation from a single LiSOCl2 primary cell for 10+ year service life. The 1 million-cycle EEPROM endurance handles daily register non-volatile updates.
Recommended
Remote Control / IR Transmitter
Consumer remote controls for TVs, set-top boxes, audio equipment, and HVAC benefit from the PIC18LF24J11T-I/SO's low-cost, low-power architecture and integrated peripherals. The CCP/ECCP modules can drive IR LEDs directly through MOSFET drivers with PWM modulation, while the 16-bit Timer1 provides accurate carrier generation at 36/38/40 kHz. nanoWatt XLP modes reduce idle current below 1 uA so the device can sit in Sleep until a wake-up from an interrupt-on-change pin or watchdog timer. Operating from 2.0 V lets the unit run from two AAA cells directly. The 4 KB RAM is ample for protocol stacks such as RC5, NEC, or SIRC, while the 16 KB Flash accommodates multiple protocol tables.
Recommended
Low-Power Industrial Sensor / 4-20 mA Loop
Industrial sensor transmitters, loop-powered 4-20 mA devices, and remote RTU interfaces benefit from the PIC18LF24J11T-I/SO's wide operating voltage and nanoWatt XLP efficiency. The 10-bit ADC with 10 channels reads multiple sensor inputs including temperature, pressure, and process variables; the 2 analog comparators can implement window-detection alarm logic. The 21 I/O pins drive HART modems, isolated UART links, or local status LEDs. Combined with the Microchip MCP6001 op-amp for 4-20 mA current loop driving and the MCP1700 LDO for low-quiescent regulation, this MCU enables loop-powered devices that draw less than 3.5 mA total from the loop while still supporting analog and digital I/O at the head-end transmitter.
Recommended
Wearable Fitness / Health Band
Wearable fitness bands, heart-rate monitors, and step counters are ideal for the PIC18LF24J11T-I/SO thanks to its nanoWatt XLP <100 nA sleep current, 2.0 V minimum VDD for direct CR2032 coin-cell operation, and small SOIC-28 package. The integrated 10-bit ADC reads optical heart-rate sensors (e.g. photodiode + op-amp front-end) and battery voltage. The 4 KB SRAM supports step-counter circular buffers and BLE protocol offload when paired with an RN4870 module. The 16 KB Flash fits BLE service tables, step-detection algorithms, and bootloader. Active-high enable on the internal 2.5V regulator allows the core to fully power-down between sensor samples, extending coin-cell life to multi-month duration.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF24J11T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF24J11-I/SO | PIC18LF24J10T-I/SO | PIC18LF2420T-I/SO | PIC18LF2455T-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-28 (0.295") | SOIC-28 (0.295") - same | SOIC-28 (0.295") - same | SOIC-28 (0.295") - same | SOIC-28 (0.295") - same |
| Flash Program Memory | 16 KB (8K x 16) | 16 KB | 16 KB | 16 KB | 24 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 768 B | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Speed | 48 MHz / 12 MIPS | 48 MHz | 48 MHz | 40 MHz | 48 MHz |
| Operating Voltage | 2.0 V to 3.6 V | 2.0-3.6 V | 2.0-3.6 V | 2.0-5.5 V | 2.0-5.5 V |
| ADC Resolution | 10-bit, 10 ch | 10-bit | 8-bit | 10-bit | 10-bit |
| USB Peripheral | No | No | No | No | Yes (USB 2.0 FS) |
| Unit Price (1k qty) | $2.15 | ~$2.15 | ~$2.00 | ~$2.40 | ~$2.85 |
Key Differentiators
- 10-bit ADC with 10 channels (vs PIC18LF24J10T-I/SO)
- Enhanced CCP (ECCP) module (vs PIC18LF24J10T-I/SO)
- nanoWatt XLP ultra-low sleep current (vs PIC18LF2420T-I/SO)
- 2.0V minimum VDD vs 3.0V for F variant (vs PIC18F24J11T-I/SO)
Design Notes
The PIC18LF24J11 integrates an internal 2.5V regulator that powers the core from the VDD pin. When VDD = 2.0V-3.6V, the MCU still operates at the full 48 MHz core speed (provided VDD >= 2.7V for >40 MHz; for full-speed 48 MHz operation use VDD >= 3.0V). For battery applications drawing peak load transients, place a 100 nF decoupling capacitor as close as possible to pin 11 (VDD) and pin 12 (VSS), plus a bulk 1 uF-10 uF tantalum or ceramic on the VDD rail. nanoWatt XLP Sleep current is specified below 100 nA typical with RTCC and full RAM retention, but only if all unused peripherals are disabled in their respective SFR control registers before entering Sleep.
The SOIC-28 (0.295 inch / 7.50 mm width) package uses the JEDEC standard land pattern with 0.05 inch (1.27 mm) pitch between pins. Provide a copper ground pour under and around the device with at least 4 vias stitching the top-layer ground to an internal ground plane for thermal dissipation and EMI reduction. Route the crystal traces (OSC1/OSC2) as short as possible with a guard ground, and keep the MCLR trace short with the standard 10 kohm pull-up to VDD and a 100 nF cap to ground to filter noise spikes.
Do not confuse the PIC18LF24J11 ("LF" prefix, 2.0-3.6V) with the PIC18F24J11 ("F" prefix, 3.0-3.6V only). Using an F variant below 3.0V causes Flash read errors and ADC malfunction. Also verify that firmware targeting the PIC18LF24J11 is compiled for the correct configuration bits (especially the IESO, FCMEN, and PWRTEN bits) - reusing code from a PIC18F4550 or PIC18F25K22 without re-flashing config bits causes the MCU to fail oscillator lock. Finally, MPLAB X IDE v5.35+ with XC8 compiler v2.30+ is required to build the latest PIC18 J-series support files.
Compliance Information
RoHS compliant and lead-free per Microchip product page. Industrial temperature grade -40C to +85C per -I/ suffix. Not AEC-Q100 qualified - this is an industrial/consumer MCU, not an automotive part.
