PIC18F24K22-E/SS - 8-bit 48MHz 16KB Flash MCU | Microchip
MPN: PIC18F24K22-E/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.45 | $1,450.00 |
PIC18F24K22-E/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM and EEPROM), and programmable peripherals. PIC18 XLP microcontrollers belong to the 8-bit PIC18 family, which uses an enhanced Harvard RISC architecture with 16-bit instructions, 8-bit data path, and hardware multiplier. The "K22" device class adds higher-frequency operation, larger memory, and the nanoWatt XLP power-management extensions that enable sleep currents below 50 nA. Within the broader taxonomy: PIC18F24K22 -> PIC18 microcontroller -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC.
Key features include 16 KB Flash, 768 bytes RAM, 256 bytes EEPROM, 25 I/O pins, two Enhanced USART modules, two MSSP (SPI/I2C) ports, a 10-bit ADC with up to 17 channels, multiple 8-bit and 16-bit timers, and a PWM module with complementary outputs. The device provides 36 instructions, an 8x8 hardware multiplier, and an extended instruction set optimized for C compilers. On-chip debugging is supported via ICSP and ICD.
The PIC18F24K22 family uses a 14-bit instruction word with 32-level hardware stack and interrupt-driven design. Internal oscillator blocks are factory-calibrated to ±1% across temperature, allowing designs without external crystals. Hardware peripherals are mapped through PPS (Peripheral Pin Select) for flexible routing, which simplifies PCB layout when migrating between PIC18F2XK22 and PIC18F4XK22 pinout variants.
Typical applications include automotive body electronics, industrial sensor nodes, smart meters, home appliances, USB peripherals, LCD/LED display controllers, and battery-powered IoT endpoints. The combination of automotive temperature grade (-40 C to +125 C), low sleep current, and rich analog/digital peripherals makes it especially suitable for sensor hubs, motor control auxiliaries, and remote control transmitters.
When designing with this MCU, ensure the ICSPDAT/ICSPCLK pins are accessible for in-circuit programming, and observe the Vcap pin requirement on the regulated core voltage. Brown-out reset should be enabled for automotive and industrial safety-critical applications. Configuration bits must be set before code execution to define oscillator mode and code protection.
This page synthesizes distributor pricing, drop-in alternatives within the SSOP-28 footprint, and practical design notes not found in the manufacturer datasheet alone, supporting faster component selection and supply-chain decisions.
Drop-in alternatives for PIC18F24K22-E/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 PIC18F24K22-E/SS (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core Architecture, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F24K22-I/SS
✅ Drop-In✓ In Stock
$1.32 / Unit
View Datasheet →PIC18F24K22-E/SSVAO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F24K22T-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F24K22-E/MV
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC18F24K20-E/SS
✅ Drop-In✓ In Stock
$2.25 / Unit
View Datasheet →PIC18F24J50-I/SS
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →PIC18F24K22-E/SS Maximum Ratings & Electrical Characteristics
| Core Processor | PIC |
| Core Size | 8-Bit |
| CPU Speed | 48 MHz |
| Program Memory | 16 KB (8K x 16) Flash |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Supply Voltage | 1.8 V to 5.5 V |
| Operating Temperature | -40 C to +125 C (Automotive E grade) |
| I/O Pins | 25 |
| ADC | 10-bit, up to 17 channels |
| Communication | 2x EUSART, 2x MSSP (SPI/I2C) |
| Package | 28-SSOP (5.30 mm width) |
| Mounting Type | Surface Mount |
| Oscillator | Internal factory-calibrated, PLL optional |
| Instruction Set | PIC18 16-bit instruction, 8-bit data path |
| ICSP | In-Circuit Serial Programming supported |
| RoHS Status | Compliant |
PIC18F24K22-E/SS Pin Configuration
| Pin 1 | RA0/AN0 — Digital I/O / Analog input 0 |
| Pin 2 | RA1/AN1 — Digital I/O / Analog input 1 |
| Pin 3 | RA2/AN2 — Digital I/O / Analog input 2 |
| Pin 4 | RA3/AN3/Vref+ — Digital I/O / Analog input 3 / ADC Vref+ |
| Pin 5 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pin 6 | RA5/AN4/SS/HLVDIN — Digital I/O / Analog input 4 / SPI SS / HLVD input |
| Pin 7 | RA6/OSC2/CLKO — Digital I/O / Crystal oscillator output |
| Pin 8 | RA7/OSC1/CLKI — Digital I/O / Crystal oscillator input |
| Pin 9 | VDD — Positive supply voltage |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RC0/SOSCO — Digital I/O / Secondary oscillator output |
| Pin 12 | RC1/SOSCI — Digital I/O / Secondary oscillator input |
| Pin 13 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| Pin 14 | RC3/SCL/SCK — Digital I/O / I2C clock / SPI clock |
| Pin 15 | RC4/SDA/SDI — Digital I/O / I2C data / SPI data in |
| Pin 16 | RC5/SDO — Digital I/O / SPI data out |
| Pin 17 | RC6/TX/CK — Digital I/O / EUSART TX / clock |
| Pin 18 | RC7/RX/DT — Digital I/O / EUSART RX / data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / PWM fault |
| Pin 22 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Pin 23 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Pin 24 | RB3/INT3/CCP2 — Digital I/O / External interrupt 3 / CCP2 |
| Pin 25 | RB4 — Digital I/O / interrupt-on-change |
| Pin 26 | RB5 — Digital I/O / interrupt-on-change |
| Pin 27 | RB6/PGC/ICSPCLK — Digital I/O / ICSP clock / programming clock |
| Pin 28 | RB7/PGD/ICSPDAT — Digital I/O / ICSP data / programming data |
Typical Applications
PIC18F24K22-E/SS is suitable for 7 applications: Automotive Body Electronics, Industrial Sensor Node, Battery-Powered IoT Endpoint, Smart Meter and Utility Monitoring, Home Appliance Control Board, USB HID Peripheral (with companion MCU), LCD/LED Display Controller.
Automotive Body Electronics
The PIC18F24K22-E/SS is well suited to automotive body modules including seat controllers, mirror actuators, climate sensor nodes, and lighting drivers. Its -E automotive temperature grade (-40 C to +125 C), 1.8-5.5 V supply range, and EUSART/MSSP peripherals enable reliable communication with CAN-LIN gateway MCUs. The nanoWatt XLP deep-sleep current below 50 nA extends quiescent battery life for parked-vehicle scenarios where modules must respond within microseconds to wake events while drawing negligible current.
Recommended
Industrial Sensor Node
In industrial sensor nodes the PIC18F24K22-E/SS provides 17 channels of 10-bit ADC, two MSSP ports for I2C sensors, and on-chip EEPROM for calibration storage. With internal ±1% oscillator the design eliminates external crystals, lowering BOM cost. The 48 MHz CPU supports Modbus RTU over EUSART at 115.2 kbps with margin for application code, while the 1.8 V minimum supply allows direct Li-ion battery operation across the full discharge curve.
Recommended
Battery-Powered IoT Endpoint
The PIC18F24K22-E/SS supports battery-powered IoT endpoints via nanoWatt XLP technology, which delivers sub-50 nA sleep currents. The internal low-frequency LFINTOSC allows wake-from-sleep timing without external crystals. At 3 V supply the device runs up to 16 MHz, while peripherals remain operational; this lets a sensor node transmit LoRa or Sub-GHz packets periodically and return to deep sleep, achieving multi-year battery life on a single 2xAA pack in many telemetry scenarios.
Recommended
Smart Meter and Utility Monitoring
In smart electricity, water, and gas meters, the PIC18F24K22-E/SS drives LCD displays, measures pulse outputs from sensor transducers, and stores tariffs in its 256-byte EEPROM. The 16 KB Flash supports segmented metrology firmware and Modbus/wireless M-Bus protocol stacks. The automotive temperature grade guarantees operation in outdoor cabinets, and 1.8 V operation from a single lithium primary cell supports 10+ year meter lifetimes with appropriate duty cycling.
Recommended
Home Appliance Control Board
White-goods control boards use the PIC18F24K22-E/SS for user-interface handling, sensor reading, and triac/relay control. The 16-bit Enhanced PWM with complementary outputs drives small motors and heating elements, while EUSART supports diagnostics. Designers benefit from the wide VDD range (1.8-5.5 V) when powering from rectified mains rails, and the automotive temperature grade ensures reliability in high-heat enclosures such as ovens and washing-machine motors.
Recommended
USB HID Peripheral (with companion MCU)
While the PIC18F24K22-E/SS lacks native USB, it pairs well with PIC18F24J50 family or external USB UART bridges to implement USB HID peripherals such as custom keypads, encoder knobs, and HID game controllers. Using the MSSP port to communicate with a USB bridge or using bit-banging on the 25 I/O pins keeps firmware simple. The 48 MHz CPU enables responsive HID polling at 125 Hz-1000 Hz without taxing the rest of the application.
Recommended
LCD/LED Display Controller
The PIC18F24K22-E/SS controls character LCD, segment LCD, or LED matrix displays for vending machines, industrial HMIs, and instrumentation. Its PWM peripheral drives LED backlights with precise dimming, while the EUSART links to a host controller. With 25 I/O pins and PPS flexibility, designers route multiple display control lines without muxes; the 48 MHz core renders menus smoothly and the wide VDD range supports direct 3.3 V or 5 V display logic.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F24K22-E/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F24K22-I/SS | PIC18F24K22-E/SSVAO | PIC18F24K22T-I/SS | PIC18F24K22-E/MV | PIC18F24K20-E/SS | PIC18F24J50-I/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-UQFN/MV | 28-SSOP | 28-SSOP |
| Core Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 40 MHz | 48 MHz |
| Flash | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| RAM | 768 B | 768 B | 768 B | 768 B | 768 B | 768 B | 3.8 KB |
| Temperature Grade | -40C to +125C (Automotive) | -40C to +85C (Industrial) | -40C to +125C (Automotive) | -40C to +85C (Industrial) | -40C to +125C (Automotive) | -40C to +125C (Automotive) | -40C to +85C (Industrial) |
| nanoWatt XLP | Yes | Yes | Yes | Yes | Yes | No (older nanoWatt) | Yes |
| USB | No | No | No | No | No | No | Yes (USB 2.0 FS) |
Key Differentiators
- Automotive-grade silicon over industrial (vs PIC18F24K22-I/SS)
- Includes nanoWatt XLP deep-sleep (vs PIC18F24K20-E/SS)
- No native USB versus PIC18F24J50 family (vs PIC18F24J50-I/SS)
Design Notes
PIC18F24K22-E/SS supports VDD from 1.8 V to 5.5 V. For stable operation, place a 100 nF decoupling capacitor on each VDD pin (pins 9 and 20) close to the package, plus a bulk 4.7 uF tantalum or ceramic on the rail. The Vcap pin (internal voltage regulator output) requires a 1 uF-10 uF low-ESR capacitor to ground for the on-chip 1.8 V core rail; failure to add this capacitor causes undefined behavior or POR issues.
Route the ICSP signals (RB6/ICSPCLK pin 27 and RB7/ICSPDAT pin 28) to a programming header even if not used in production; this enables in-field firmware updates and debugging. Keep ICSP traces short and away from switching signals. The ICSP connector should not load the signals during normal operation; Microchip application note TB087 recommends series resistors only if isolation is needed.
Configuration bits (fuses) must be set before code execution; forgetting to configure the oscillator mode (HS, XT, INTOSC, PLL) leads to system clocking errors. Brown-out reset (BOR) is recommended at 2.85 V minimum for automotive and industrial safety-critical designs to prevent Flash corruption at low VDD. Unused I/O pins should be configured as outputs low or inputs with internal weak pull-ups to minimize supply current.
When using the MSSP module in I2C mode, external pull-ups of 4.7 kohm (at 100 kHz) or 2.2 kohm (at 400 kHz) are required; the PIC18F24K22-E/SS I2C pins are open-drain only. For SPI bus runs longer than 50 mm, reduce clock rate to 1 MHz or add series resistors near the driver; high-speed SPI with no termination can cause ringing that misclocks the PIC18 peripheral. Decouple each SPI device with 100 nF locally.
The PIC18F24K22-E/SS in 28-SSOP package dissipates very low power (typically <50 mW active), so thermal management is rarely required. Estimated: at maximum 48 MHz and 5.5 V, active current is around 8 mA, dissipating ~44 mW; SSOP-28 theta_JA ~85 C/W implies 3.7 C junction rise above ambient - well within the -40 C to +125 C operating range. No external heatsink is required even at high ambient temperatures.
Compliance Information
RoHS and lead-free compliant per Microchip product page. -E grade is automotive temperature qualified but not explicitly AEC-Q100 qualified at the standard level - consult Microchip for automotive compliance documentation per specific end-customer requirements.
