PIC18F26K22-E/SS - 8-Bit 64KB Flash MCU, 28-SSOP | Microchip
MPN: PIC18F26K22-E/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.94 | $3.94 |
| 10 | $3.62 | $36.20 |
| 100 | $3.18 | $318.00 |
| 500 | $2.86 | $1,430.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC18F26K22-E/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data bus that integrates a CPU, RAM, program memory, peripherals, and I/O on one silicon die. The 8-bit PIC architecture uses a RISC instruction set optimized for C compilation, with a Harvard memory architecture separating program and data paths. The PIC18 family extends this with hardware multiply, extended addressing to 64 KB Flash, and enhanced peripherals such as multiple UART, SPI, and I2C. PIC18F26K22-E/SS belongs to the broader hierarchy: microcontroller -> embedded processor -> semiconductor -> integrated circuit.
Key features of the PIC18F26K22-E/SS include nanoWatt XLP technology for ultra-low-power sleep currents (down to nanoAmp levels), a 16 MIPS instruction throughput at 48 MHz, two enhanced USART modules, two MSSP (I2C/SPI) peripherals, a 10-bit ADC with up to 28 channels, four 8-bit/16-bit timer/counters, and dual analog comparators. The device operates across an extended voltage range and includes an integrated voltage reference.
Architecturally, the PIC18F26K22-E/SS combines a C compiler-optimized RISC core with a high-endurance Flash (typically 100k erase/write cycles) and a peripheral-rich analog and digital I/O structure. Self-programmability under software control supports bootloader-based field updates, while the nanoWatt XLP technology keeps quiescent current low enough for battery applications.
Typical applications for the PIC18F26K22-E/SS include industrial control and sensor conditioning, low-power remote keyless entry, consumer appliances, USB/HID devices using the device's full-speed USB-compatible peripherals, portable medical devices, and automotive body electronics not requiring AEC-Q100 qualification. Designers favor this part when migration paths exist within the PIC18F26K22 family across SPDIP, SOIC, and SSOP footprints.
When designing with this MCU, note that the E suffix indicates the -40C to +125C extended temperature grade (vs the -I industrial grade at -40C to +85C), and the SS suffix denotes the 28-pin SSOP package. Ensure your ICD/MPLAB debugger is set for the correct device ID and check that the I2C/SPI remap configuration matches your PCB layout.
This page synthesizes authoritative Microchip datasheet specifications, distributor pricing as of 2026-09-27, drop-in pin-compatible alternatives (including newer PIC18F26Q10), and practical design considerations not found on a single distributor page.
Drop-in alternatives for PIC18F26K22-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 PIC18F26K22-E/SS (same form factor and footprint) — differing in ADC, Package, Program Memory (Flash), DAC, Data EEPROM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F26K22-I/SS
✅ Drop-In✓ In Stock
$2.78 / Unit
View Datasheet →PIC18F26Q10-I/SS
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC18F25K22-E/SS
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC18F26K20-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F26K42-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F26Q43-I/SS
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC18F26K22-E/SS Maximum Ratings & Electrical Characteristics
| Product Type | Microcontroller (MCU) |
| Core Architecture | PIC18 (8-bit) |
| Family | PIC XLP 18K |
| CPU Speed | 48 MHz (16 MIPS) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| SRAM | 3968 bytes |
| Data EEPROM | 1024 bytes |
| Package | 28-SSOP (5.30 mm) |
| Pin Count | 28 |
| Operating Temperature Range | -40C to +125C (Extended, E grade) |
| I/O Pins | 24 |
| ADC | 10-bit, multi-channel |
| Timers | Multiple 8/16-bit (4+) |
| Communication Peripherals | 2x USART (EUSART), 2x MSSP (I2C/SPI) |
| Technology | nanoWatt XLP low-power |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F26K22-E/SS Pin Configuration
| Pin 1 | RA2/AN2/DACREF-/CVREF-/C2IN+/C1IN0+ — PORTA I/O, ADC input, DAC negative reference, comparator input |
| Pin 2 | RA3/AN3/VREF+/C1IN+/C2IN+ — PORTA I/O, ADC input, voltage reference positive, comparator input |
| Pin 3 | RA4/AN4/C2OUT/SRQ — PORTA I/O, ADC input, comparator output, SR latch output |
| Pin 4 | RA5/AN5/C1OUT/SRNQ — PORTA I/O, ADC input, comparator output, SR latch output |
| Pin 5 | Vss — Ground reference |
| Pin 6 | RA7/OSC1/CLKIN — PORTA I/O, oscillator input, external clock input |
| Pin 7 | RA6/OSC2/CLKOUT — PORTA I/O, oscillator output, clock output |
| Pin 8 | RC0/PWM1/CCP4/T0CKI — PORTC I/O, PWM output, capture/compare, Timer0 clock input |
| Pin 9 | RC1/PWM2/CCP5 — PORTC I/O, PWM output, capture/compare |
| Pin 10 | RC2/PWM3/CCP2/AN22 — PORTC I/O, PWM output, capture/compare, ADC input |
| Pin 11 | RC3/AN15/SCK/SCL/SEG0 — PORTC I/O, ADC input, SPI clock, I2C clock, LCD segment output |
| Pin 12 | RC4/AN16/SDI/SDA/SEG1 — PORTC I/O, ADC input, SPI data in, I2C data, LCD segment output |
| Pin 13 | RC5/AN17/SDO/SEG2 — PORTC I/O, ADC input, SPI data out, LCD segment output |
| Pin 14 | RC6/AN18/TX/CK/CCP3 — PORTC I/O, ADC input, EUSART async transmit/clock, capture/compare |
| Pin 15 | RC7/AN19/RX/DT/CCP4 — PORTC I/O, ADC input, EUSART async receive/data, capture/compare |
| Pin 16 | Vss — Ground reference |
| Pin 17 | VCAP — External filter capacitor for internal voltage regulator |
| Pin 18 | RB0/AN12/INT0/FLT0/SDA1 — PORTB I/O, ADC input, external interrupt, PWM fault, I2C data 1 |
| Pin 19 | RB1/AN10/INT1/SCL1 — PORTB I/O, ADC input, external interrupt, I2C clock 1 |
| Pin 20 | RB2/AN8/INT2/CTDUG — PORTB I/O, ADC input, external interrupt, capacitive touch |
| Pin 21 | RB3/AN9/CTED2/CCP2 — PORTB I/O, ADC input, capacitive touch, capture/compare |
| Pin 22 | RB4/AN11/CTPLS/SCL2 — PORTB I/O, ADC input, capacitive touch, I2C clock 2 |
| Pin 23 | RB5/AN7/CTED1/SDA2 — PORTB I/O, ADC input, capacitive touch, I2C data 2 |
| Pin 24 | RB6/ICSPCLK — PORTB I/O, In-Circuit Serial Programming clock |
| Pin 25 | RB7/ICSPDAT — PORTB I/O, In-Circuit Serial Programming data |
| Pin 26 | VDD — Positive supply voltage |
| Pin 27 | RA0/AN0/C1IN0-/C2IN0-/ULPWU — PORTA I/O, ADC input, comparator input, ultra-low-power wake-up |
| Pin 28 | RA1/AN1/C1IN1-/C2IN1-/VBG — PORTA I/O, ADC input, comparator input, internal bandgap reference |
Typical Applications
PIC18F26K22-E/SS is suitable for 6 applications: Industrial Sensor Conditioning and Control, Low-Power Remote Keyless Entry / Battery Devices, Consumer Appliances and Home Devices, Portable Medical and Health Devices, USB HID and Embedded User Interface Devices, Automotive Body and Accessory Electronics (Non-AEC-Q100).
Industrial Sensor Conditioning and Control
The PIC18F26K22-E/SS fits industrial sensor conditioning and control applications through its combination of a 10-bit ADC with multi-channel input, EUSART and MSSP peripherals, and nanoWalt XLP technology for sleep-mode currents in the nanoAmp range. With a 48 MHz CPU delivering 16 MIPS, the MCU can sample, filter, and respond to sensor data in real time while remaining well below its throughput ceiling. In typical designs, the chip reads multiple analog sensors via ADC channels, drives RS-485 communication via the EUSART, and reduces average power through XLP sleep between conversions. Its -40C to +125C extended range supports plant-floor environments close to motors or heaters. The 28-SSOP footprint permits compact sensor modules with adequate PCB copper for thermal management.
Recommended
Low-Power Remote Keyless Entry / Battery Devices
The PIC18F26K22-E/SS is well suited to low-power remote-keyless-entry and battery-operated devices thanks to its nanoWatt XLP technology, which holds deep-sleep current in the nanoAmp range while keeping RAM retention and wake-on-interrupt capability. With 64 KB of Flash, designers can implement rolling-code security, RF protocol stacks, and small state machines without code-space pressure. The 48 MHz core allows fast cryptography and CRC computation when the device wakes, then returns to deep-sleep between user events. The 28-SSOP package keeps the PCB area small for key-fob or handheld form factors, and the extended -40C to +125C operating range supports automotive and outdoor environments. Designing for XLP requires careful management of the ADC, BOD, and WDT configuration to minimize sleep current.
Recommended
Consumer Appliances and Home Devices
The PIC18F26K22-E/SS provides cost-effective performance for consumer appliances such as coffee machines, washing-machine sub-modules, and HVAC controllers, where reliable control of relays, triacs, and sensors is essential. Two EUSART and two MSSP peripherals allow simultaneous communication to a main controller (UART), to a sensor bus (I2C), and to high-speed peripherals (SPI). The 64 KB program memory stores user-interface logic and small protocol stacks. The 28-SSOP package is compatible with high-volume SMT assembly lines and benefits from extensive Microchip support including MPLAB X IDE and XC8 compiler. Using the EUSART's LIN-capable mode enables simple master/slave appliance networks. Ensure USB or wireless modules connect through protection circuits and that firmware implements safe state recovery on brown-out.
Recommended
Portable Medical and Health Devices
The PIC18F26K22-E/SS supports portable medical and health devices such as handheld diagnostic peripherals, low-end patient monitors, and personal drug-delivery systems where deterministic 8-bit control, low power, and small PCB area are required. Its 10-bit ADC is suitable for thermistor, battery-monitoring, and simple biometric front-ends, while the EUSART outputs patient data over Bluetooth or wired links. nanoWalt XLP technology preserves battery life between uses, and the -40C to +125C extended operating range tolerates skin-contact and ambient variation. The 28-SSOP package fits pocketable enclosures, and Microchip's IEC 60730 Class B software libraries simplify functional-safety verification for medical firmware.
Recommended
USB HID and Embedded User Interface Devices
The PIC18F26K22-E/SS can drive USB HID peripherals and small embedded user interfaces including custom keyboards, programmable keypads, and Human Interface Device-class accessories when paired with a USB transceiver, although the MCU itself does not include an internal USB transceiver. The 48 MHz core delivers sufficient throughput to handle USB HID frames and HID-class parsers while leaving headroom for debounce and LED control. The two EUSART plus MSSP flexibility supports UART debug alongside SPI-driven display drivers and I2C sensors. 64 KB of Flash accommodates HID report descriptors plus rich firmware logic. The 28-SSOP footprint supports thin, lightweight enclosures, and nanoWalt XLP helps USB suspend-current compliance on bus-powered designs. Good practice demands USB VBUS surge protection and ceramic decoupling near the MCU power pins.
Recommended
Automotive Body and Accessory Electronics (Non-AEC-Q100)
The PIC18F26K22-E/SS is widely deployed in non-AEC-Q100 automotive body and accessory applications such as interior lighting controllers, climate-control modules, switch panels, and aftermarket accessories that do not require formal automotive qualification. The -40C to +125C extended temperature grade supports under-hood and dashboard thermal environments, while nanoWalt XLP technology supports parasitic-power and wake-up sensor networks. The 28-SSOP package is robust under conformal coating or sealed enclosures, and the two EUSART modules enable LIN bus communications when using a LIN transceiver. The 64 KB Flash allows manufacturers to implement security, diagnostics, and LIN stack code on the same device. The Microchip datasheet explicitly does NOT carry AEC-Q100 qualification, so designers must evaluate the variant accordingly. Use E-grade parts for the harshest temperature pockets of the vehicle interior.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F26K22-E/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F26K22-I/SS | PIC18F26Q10-I/SS | PIC18F25K22-E/SS | PIC18F26K20-E/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) |
| Program Memory (Flash) | 64 KB | 64 KB | 64 KB | 32 KB | 64 KB |
| CPU Frequency | 48 MHz (16 MIPS) | 48 MHz (16 MIPS) | 64 MHz (16 MIPS) | 48 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating Temperature | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +125C (E grade) |
| Low-Power Technology | nanoWatt XLP | nanoWatt XLP | XLP (updated) | nanoWatt XLP | nanoWatt XLP |
| Status | Active (newer Q10 suggested) | Active | Active (current generation) | Active | Active (older family) |
Key Differentiators
- Industry-standard 28-SSOP footprint with -40C to +125C operating range (vs PIC18F26K22-I/SS)
- Manufacturer-suggested newer device available with same 28-SSOP pinout (vs PIC18F26Q10-I/SS)
- More Flash memory than the 25K22 sibling in same 28-SSOP package (vs PIC18F25K22-E/SS)
Design Notes
The PIC18F26K22-E/SS integrates a voltage regulator requiring a capacitor on the VCAP pin (pin 17). Place a low-ESR ceramic capacitor (typically 1uF to 10uF) as close to VCAP as possible, with the shortest possible trace to ground. When the MCU is running at high frequency (48 MHz), supplement the local decoupling with bulk capacitance on VDD (pin 26), with both 0.1uF and 1uF ceramic bypass directly at the supply pin. This combination prevents regulator dropout under transient loads.
Although the PIC18F26K22-E/SS is not a power device, its industrial operation across -40C to +125C still requires thermal attention in sealed enclosures with nearby heat sources. Estimated power dissipation at 48 MHz with all peripherals active is roughly 15-25 mW, low enough that standard PCB copper pour (1 oz copper) suffices. For continuous USB or RF operation near other heat sources, validate at worst-case ambient by measuring the case temperature. Provide adequate venting or copper pad area to keep junction temperature well below 125C under DC load.
When designing PCB layout, isolate the analog pins (RA0-RA5, RB0-RB5, RC3-RC7, ADC channels) from fast switching traces such as oscillator and PWM outputs to avoid noise coupling. Use the analog ground and digital ground separation technique if your application is noise-sensitive; tie them at a single star point at the device Vss. Place the ICSP pins (RB6 ICSPCLK and RB7 ICSPDAT) in a way that leaves them accessible for in-circuit serial programming without rework. A footprint note: the 28-SSOP pin pitch is 0.65 mm; ensure your assembly house can reliably support this fine-pitch package on the chosen board thickness.
A common pitfall when migrating PIC18F26K22 firmware is to assume the SFR map is identical across E and I grade variants - it is - but only within the K22 family. Migrating to PIC18F26Q10 or PIC18F26K42 requires revalidation because the oscillator, ADC, and PWM control registers differ. Another frequent mistake is leaving the WDT enabled with no software strategy; for low-power designs, switch off the WDT or implement a precise WDT-driven wake loop. Finally, always ensure the configuration bits (PRIMARY oscillator, BOR, ICSP enable, code protection) match the intended application before mass production programming.
Compliance Information
RoHS and REACH compliant per Microchip product information. The PIC18F26K22-E/SS does not carry AEC-Q100 qualification; designers needing AEC-Q100 must evaluate newer AEC-Q100-qualified PIC18 variants or seek automotive grade. The Microchip datasheet does not specifically state halogen-free status beyond the standard lead-free manufacturing with Pb-free terminal finish.
