PIC18F24K40-E/SP - 8-bit 64MHz MCU, 16KB Flash, XLP | Microchip
MPN: PIC18F24K40-E/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.05 | $2.05 |
| 10 | $1.84 | $18.40 |
| 100 | $1.62 | $162.00 |
| 500 | $1.41 | $705.00 |
| 1,000 | $1.27 | $1,270.00 |
PIC18F24K40-E/SP Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and a configurable set of peripheral interfaces. Within the broader taxonomy it belongs to: MCU -> 8-bit microcontroller -> PIC18 family -> PIC18F K-series -> power-conscious general-purpose controller. The "F" denotes Flash program memory, the "K" identifies the K40 low-power generation, and the "40" locates this part within the 28-pin Flash-equipped tier of the family.
Key features include a 10-bit ADC with computation, a 5-bit DAC, two comparators, multiple PWM/CCP/CWG channels, and a Windowed Watchdog Timer (WWDT) for safety-critical loops. The integrated Peripheral Pin Select (PPS) module allows digital peripherals to be remapped to a wide range of I/O pins, simplifying PCB routing when compared with older PIC18 generations. Zero-Cross Detect (ZCD) and the Hardware Limit Timer (HLT) further reduce CPU load for AC-line and motor-control applications.
The K40 family is built on an enhanced PIC18 Harvard architecture with a 16-bit instruction word, an 8-level hardware stack, and a modified RISC pipeline that delivers up to 16 MIPS at 64 MHz. XLP technology brings nanoWatt features such as IDLE and DOZE modes, Peripheral Module Disable (PMD), and a low-power Sleep mode that drops current consumption to the nanoampere range while preserving RAM and interrupt wake-up capability.
Typical applications include appliance control, IoT edge nodes, industrial sensor interfaces, automotive body and lighting subsystems, and any 5V-tolerant embedded design that benefits from low quiescent current and a small SPDIP footprint. The SPDIP-28 package is especially popular for breadboarding, educational kits, and through-hole production builds where hand-soldering or rework is required.
When designing with the PIC18F24K40-E/SP, leave VDD/VSS decoupling ceramic capacitors (typically 100 nF) within a few millimeters of the pins and respect the ICSP programming interface requirements (PGD/PGC on dedicated pins). For power-sensitive designs, exploit IDLE and Sleep modes plus PMD to gate unused peripherals and benchmark current consumption against the datasheet's nanoWatt typical curves before finalizing the BOM.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet - giving engineers a single-source reference for evaluation, sourcing, and design-in decisions.
Drop-in alternatives for PIC18F24K40-E/SP — 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 PIC18F24K40-E/SP (same form factor and footprint) — differing in ADC, Package, DAC, Communication, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F24K40-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F24K40T-I/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F24K40-E/SO
✅ Drop-In✓ In Stock
$1.2 / Unit
View Datasheet →PIC18F24K40-E/MV
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC18F24K40-E/ML
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC18F25K40-E/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F23K40-E/SP
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F24K40-E/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit Harvard, 16-bit instruction word) |
| Family | PIC18F K40 series (XLP, eXtreme Low Power) |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data SRAM | 1 KB |
| Data EEPROM | 256 B |
| Operating Temperature Range | -40C to +125C (Extended, "-E" grade) |
| Package | 28-pin SPDIP (Skinny Plastic DIP, through-hole) |
| ADC | 10-bit ADC with computation (ADC2) |
| DAC | 5-bit DAC |
| Comparators | 2 |
| PWM / CCP / CWG | PWM, CCP, Complementary Waveform Generator (CWG) |
| Watchdog | Windowed WDT (WWDT) |
| Communication | EUSART, SPI, I2C |
| Special Features | Peripheral Pin Select (PPS), ZCD, HLT, CRC/SCAN, IDLE/DOZE/PMD |
| ICSP Programming | In-Circuit Serial Programming supported |
| RoHS Status | Compliant |
PIC18F24K40-E/SP Pin Configuration
| Pin 1 | MCLR/RE3 — Master Clear (Reset) input; RE3 if used as GPIO |
| Pin 2 | RA0 — PORTA bit 0 (analog-capable, CCP/PPS) |
| Pin 3 | RA1 — PORTA bit 1 (analog-capable) |
| Pin 4 | RA2 — PORTA bit 2 (analog-capable, DAC output) |
| Pin 5 | RA3 — PORTA bit 3 (analog-capable) |
| Pin 6 | RA4 — PORTA bit 4 (analog-capable) |
| Pin 7 | RA5 — PORTA bit 5 (analog-capable) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7/OSC1 — PORTA bit 7 / crystal oscillator input |
| Pin 10 | RA6/OSC2 — PORTA bit 6 / crystal oscillator output |
| Pin 11 | RC0 — PORTC bit 0 (PPS) |
| Pin 12 | RC1 — PORTC bit 1 (PPS) |
| Pin 13 | RC2 — PORTC bit 2 (PPS) |
| Pin 14 | RC3 — PORTC bit 3 (PPS, SCL default) |
| Pin 15 | RC4 — PORTC bit 4 (PPS, SDA default) |
| Pin 16 | RC5 — PORTC bit 5 (PPS) |
| Pin 17 | RC6 — PORTC bit 6 (PPS, TX default) |
| Pin 18 | RC7 — PORTC bit 7 (PPS, RX default) |
| Pin 19 | VSS — Ground reference (second VSS) |
| Pin 20 | VDD — Positive supply (second VDD) |
| Pin 21 | RB0 — PORTB bit 0 (interrupt-on-change, ICSP DAT) |
| Pin 22 | RB1 — PORTB bit 1 (ICSP CLK) |
| Pin 23 | RB2 — PORTB bit 2 |
| Pin 24 | RB3 — PORTB bit 3 |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5 — PORTB bit 5 |
| Pin 27 | RB6 — PORTB bit 6 (ICSP PGC) |
| Pin 28 | RB7 — PORTB bit 7 (ICSP PGD) |
Typical Applications
PIC18F24K40-E/SP is suitable for 6 applications: Appliance Control (White Goods), Industrial Sensor Interface, Automotive Body and Lighting Modules, IoT Edge Node / Battery-Powered Sensor Hub, Consumer Electronics and Remote Controls, Educational and Hobby / Breadboard Designs.
Appliance Control (White Goods)
The PIC18F24K40-E/SP is well suited to white-goods controllers such as washing machines, dishwashers, refrigerators, and microwave ovens. Its 64 MHz PIC18 core delivers the throughput needed for sensor-fusion algorithms (temperature, level, motor RPM) while the integrated 10-bit ADC2 with computation, two comparators, and the Complementary Waveform Generator (CWG) enable direct drive of TRIAC, IGBT, or MOSFET power stages. The SPDIP-28 package is ideal for through-hole production boards that may be hand-reworked in the field. XLP nanoWatt Sleep plus IDLE/DOZE modes keep standby consumption low between user interactions, helping meet ENERGY STAR idle-power budgets. The WWDT and CRC/SCAN add the diagnostic coverage demanded by modern IEC 60730 household appliance safety requirements.
Recommended
Industrial Sensor Interface
Industrial sensor nodes benefit from the PIC18F24K40-E/SP's combination of analog and digital peripherals. The 10-bit ADC2 with computation handles ratiometric bridge and 4-20 mA current loop inputs, while the 5-bit DAC and two comparators drive threshold-detection or analog-output loops. EUSART plus SPI/I2C connect to sensors, displays, and isolated RS-485 transceivers for Modbus RTU slave nodes. Peripheral Pin Select (PPS) lets engineers reassign UART, SPI, and PWM to nearly any I/O pin, simplifying PCB layout when board shapes change between SKUs. The Windowed Watchdog Timer (WWDT) and CRC/SCAN peripherals provide the deterministic self-checking required by IEC 61508 SIL-1 style functional-safety designs. Extended -40C to +125C operation covers outdoor and cabinet-mounted installations.
Recommended
Automotive Body and Lighting Modules
The PIC18F24K40-E/SP is used in automotive body-electronics modules such as interior lighting controllers, mirror adjusters, seat controllers, and HVAC blend-door actuators. The 64 MHz core and rich PWM/CCP/CWG peripherals support multi-channel LED dimming, fade-in/fade-out sequences, and brushed-motor H-bridge commutation. Zero-Cross Detect (ZCD) simplifies AC-line-synchronized dimmer topologies for incandescent and dimmable LED retrofit lamps. The Hardware Limit Timer (HLT) protects actuators by enforcing minimum and maximum pulse widths without CPU intervention. Note that the -E grade part operates to +125C and is suitable for cabin-mounted ECUs; for under-hood deployment (-40C to +150C) the AEC-Q100-qualified Q-version must be selected instead.
Recommended
IoT Edge Node / Battery-Powered Sensor Hub
Battery-powered IoT edge nodes - such as wireless environmental sensors, smart locks, and asset trackers - rely on the PIC18F24K40-E/SP's XLP nanoWatt technology to achieve multi-year battery life. The core can wake from Sleep on interrupt in microseconds, take an ADC reading from a sensor, transmit via EUSART-connected radio, and return to Sleep, all while drawing nanoamp-level Sleep current. IDLE and DOZE modes plus Peripheral Module Disable (PMD) provide fine-grained current control when peripherals are not in use. The 16 KB Flash and 1 KB RAM fit small TCP/IP or LoRaWAN-style stacks on top of application code, and 256 B EEPROM stores calibration and network credentials across power cycles.
Recommended
Consumer Electronics and Remote Controls
Consumer products such as universal remote controls, smart thermostats, and small appliances benefit from the PIC18F24K40-E/SP's low BOM cost, on-chip peripherals, and SPDIP-28 through-hole footprint. The EUSART, SPI, and I2C peripherals connect to LCDs, keypads, IR receivers, RF transceivers, and EEPROM or FRAM memory expansion. The 10-bit ADC2 with computation reads thermistors, photodiodes, and battery voltage directly. PWM channels drive buzzers, backlight LEDs, and small vibration motors. IDLE and DOZE power modes plus the XLP Sleep architecture extend battery life in remote-control and battery-powered thermostat applications.
Recommended
Educational and Hobby / Breadboard Designs
The PIC18F24K40-E/SP in SPDIP-28 is one of the friendliest PIC18 packages for breadboarding, college labs, and hobbyist projects because the through-hole leads seat cleanly into standard 0.1 inch pitch solderless breadboards. The wide VDD range (1.8-5.5 V per the K40 family datasheet), 5V-tolerant I/O, and ICSP programming on dedicated pins make it trivial to flash code with a PICkit 4 or MPLAB Snap without removing the chip. The PIC18F24K40-E/SP is supported by MPLAB X IDE, the free MPLAB XC8 compiler, and the MPLAB Code Configurator (MCC), which generates peripheral-init code for ADC, PWM, EUSART, I2C, and PPS with a graphical interface - ideal for teaching embedded programming.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F24K40-E/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F24K40-I/SP | PIC18F24K40T-I/SP | PIC18F25K40-E/SP | PIC18F23K40-E/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SPDIP-28 (through-hole) | SPDIP-28 (same) | SPDIP-28 (same) | SPDIP-28 (same) | SPDIP-28 (same) |
| Flash Memory | 16 KB | 16 KB | 16 KB | 32 KB | 8 KB |
| RAM | 1 KB | 1 KB | 1 KB | 2 KB | 512 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) |
| XLP Low-Power Features | Yes (IDLE, DOZE, Sleep, PMD) | Yes | Yes | Yes | Yes |
| Core Independent Peripherals (CWG, WWDT, CRC/SCAN, ZCD, PPS) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Extended -40C to +125C temperature grade in through-hole SPDIP-28 (vs PIC18F24K40-I/SP)
- Larger Flash and RAM than lower-cost K40 sibling (vs PIC18F23K40-E/SP)
- XLP nanoWatt technology plus Core Independent Peripherals reduce CPU overhead (vs PIC18F25K40-E/SP (larger-memory sibling))
- Integrated CIP and PPS eliminate external glue logic (vs PIC18F2480-I/SP (legacy non-K40 part))
Design Notes
Take advantage of the PIC18F24K40-E/SP's XLP nanoWatt Sleep mode for battery-powered designs. Estimated: with VDD=3.3 V and Sleep mode enabled (PMD = 1, peripherals gated), typical Sleep current is in the nanoampere range per the K40 family datasheet. Wake on interrupt, take an ADC reading, transmit via EUSART, and return to Sleep to keep average current below 5 uA in most sensor-node applications. Use IDLE when CPU throughput is needed and DOZE for fine-grained current scaling at reduced MIPS.
Place VDD/VSS decoupling ceramic capacitors (100 nF X7R) within 3 mm of the pins; the SPDIP-28 has two VDD/VSS pairs (pins 8/9 and 19/20) and each pair must be decoupled. Estimated: also add a 10 uF bulk capacitor near the ICSP connector to suppress programmer-induced transients during flash programming. Keep the ICSP PGC/PGD traces short and avoid routing them next to switching nodes to prevent programming errors.
When migrating from older PIC18F devices (K22, J-series, K20), remember that the K40 introduces Peripheral Pin Select (PPS). UART, SPI, I2C, CCP/PWM, CWG, and other digital peripherals must be assigned to physical I/O pins via PPS unlock and PPS register writes in firmware, or they will not function. Estimated: a missing PPS configuration is the single most common reason a K40 firmware port fails to bring up peripherals on the first attempt. Configure PPS immediately after oscillator lock and before any peripheral enable.
Route the ICSP signals (MCLR, PGD, PGC) on a separate programming header and isolate them from analog inputs to keep ADC accuracy. For mixed-signal designs, dedicate one analog VDD/VSS pair and one digital VDD/VSS pair to the MCU; use a single-point ground or split-plane with a bridge under the MCU. Estimated: doing so prevents switching noise on the digital I/O from coupling into the ADC2 input and degrading conversion accuracy below the 10-bit threshold.
Compliance Information
RoHS compliant and lead-free per Microchip product page. The PIC18F24K40-E/SP is NOT AEC-Q100 qualified; for automotive AEC-Q100 applications the Q-version must be selected. REACH compliance confirmed per Microchip regulatory statements.
