PIC18LF26K40-I/SS - 64KB Flash XLP 8-bit MCU | Microchip
MPN: PIC18LF26K40-I/SS ✓ Hoạt độngPIC18LF26K40-I/SS Tóm tắt
What is a microcontroller (MCU)? A microcontroller is a single-chip computer that combines a CPU core, non-volatile program memory (Flash), working memory (RAM), data EEPROM, and a rich set of analog and digital peripherals on one die. The PIC18LF26K40 belongs to the PIC18 8-bit RISC family within the broader 8-bit MCU category of microcontrollers and embedded controllers in integrated circuits, optimized for low-power (XLP) general-purpose designs that need to run from a single Li-ion or 2xAA cell.
Key features include the proprietary eXtreme Low-Power (XLP) technology with nanoWatt XLP sleep currents below 50 nA typical, a Core Independent Peripherals (CIPs) block that offloads timing-critical tasks from the CPU, and direct memory access via the 10-bit ADCC for automated Capacitive Voltage Divider (CVD) touch sensing. The 28-SSOP package with 0.65 mm pitch is footprint-compatible across the PIC18F/LF26K40 family, allowing easy migration between F (Flash, 1.8-5.5 V) and LF (low-voltage Flash, 1.8-3.6 V) variants and between I (industrial -40 to +85 C) and E (extended -40 to +125 C) temperature grades.
Technically, the PIC18LF26K40 implements a Harvard-architecture RISC core with a 16-bit instruction word, an 8-level hardware stack, and a 31-level software stack, providing deterministic interrupt response and single-cycle execution for most instructions. The CWG, CCP, PWM and HLT peripherals can be wired together to drive power-conversion and motor-control topologies without CPU intervention, while the SCAN/CRC peripheral performs background memory integrity checks for functional-safety designs.
Typical applications include battery-powered IoT sensor nodes, low-power wireless remotes, consumer appliances with capacitive touch user interfaces, industrial control with LIN or UART bridges, and small motor-control boards. The wide peripheral integration lets a single PIC18LF26K40 replace a discrete MCU plus several support ICs, shrinking BOM cost and PCB area.
When designing with this part, place a 100 nF decoupling capacitor on each VDD pin within 3 mm, connect all VSS pins to a solid ground pour, and keep the MCLR pull-up within 25 mm of the pin. Choose the LF (1.8-3.6 V) variant for battery operation and the F (1.8-5.5 V) variant when the board must run from a regulated 5 V rail.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers evaluate the PIC18LF26K40-I/SS against the rest of the PIC18 K40 family and competing 8-bit MCUs.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF26K40-I/SS — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF26K40-I/SS (cùng hình factor và footprint) — khác nhau ở Package, ADC, Program Memory (Flash), Core Architecture, Operating Temperature.
PIC18F26K40-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF26K40-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF26K40-E/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF25K40-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF24K40-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF26K40-I/SS Tỷ lệ tối đa & tính chất điện
| Core | PIC18 8-bit RISC (Harvard) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 4 KB |
| Data EEPROM | 256 B |
| Maximum CPU Frequency | 64 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V (LF variant) |
| Nhiệt độ hoạt động | -40 C to +85 C (I grade) |
| ADC | 10-bit ADC with Computation (ADCC) |
| DAC | 5-bit DAC |
| Comparators | Yes (with selectable reference) |
| PWM / CCP / CWG | Yes (PWM, CCP, Complementary Waveform Generator) |
| Timers / HLT / WWDT | Yes (Hardware Limit Timer, Windowed WDT) |
| SCAN / CRC | Yes (background memory integrity) |
| ZCD | Zero-Cross Detect |
| Hộp | 28-pin SSOP (0.65 mm pitch) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF26K40-I/SS
| Chân 1 | MCLR — Master Clear (reset) input, internal pull-up |
| Chân 2 | RA0 — PORTA bit 0 / analog input |
| Chân 3 | RA1 — PORTA bit 1 / analog input |
| Chân 4 | RA2 — PORTA bit 2 / analog input |
| Chân 5 | RA3 — PORTA bit 3 / analog input |
| Chân 6 | RA4 — PORTA bit 4 / analog input |
| Chân 7 | VSS — Ground reference |
| Chân 8 | VDD — Positive supply (1.8-3.6 V) |
| Chân 9 | RA5 — PORTA bit 5 / analog input |
| Chân 10 | RA6 — PORTA bit 6 / analog input |
| Chân 11 | RA7 — PORTA bit 7 / analog input |
| Chân 12 | RB0 — PORTB bit 0 / interrupt-on-change |
| Chân 13 | RB1 — PORTB bit 1 / interrupt-on-change |
| Chân 14 | RB2 — PORTB bit 2 / interrupt-on-change |
| Chân 15 | RB3 — PORTB bit 3 / interrupt-on-change |
| Chân 16 | RB4 — PORTB bit 4 / interrupt-on-change |
| Chân 17 | RB5 — PORTB bit 5 / interrupt-on-change |
| Chân 18 | RB6 — PORTB bit 6 / ICSPCLK |
| Chân 19 | VDD — Positive supply (1.8-3.6 V), second pin |
| Chân 20 | VSS — Ground reference, second pin |
| Chân 21 | RB7 — PORTB bit 7 / ICSPDAT |
| Chân 22 | RC0 — PORTC bit 0 |
| Chân 23 | RC1 — PORTC bit 1 |
| Chân 24 | RC2 — PORTC bit 2 |
| Chân 25 | RC3 — PORTC bit 3 / SCL |
| Chân 26 | RC4 — PORTC bit 4 / SDA |
| Chân 27 | RC5 — PORTC bit 5 |
| Chân 28 | RC6 — PORTC bit 6 / TX |
Ứng dụng tiêu biểu
PIC18LF26K40-I/SS phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Nodes, Capacitive Touch User Interfaces, Industrial Sensor and Control Boards, Low-Power Wireless Remote Controls, Small Motor and Fan Control, Consumer Appliance Front Panels.
Battery-Powered IoT Sensor Nodes
The PIC18LF26K40-I/SS fits battery-powered IoT sensor nodes because its 1.8-3.6 V VDD range pairs directly with a 2xAA or regulated 3.3 V rail, and its nanoWatt XLP sleep mode drops quiescent current below 50 nA typical. With 64 KB Flash and 4 KB RAM the part hosts a full LoRaWAN or BLE-MCU bridge stack including sensor drivers, while the 10-bit ADCC scans analog sensors autonomously. Engineers use Sleep + WDT + periodic ADCC wake cycles to push coin-cell lifetime beyond 3 years; compared to a generic 8-bit MCU the integrated ADCC saves a separate analog-front-end IC and the 28-SSOP keeps the BOM under $2 at qty 1000.
Được đề xuất
Capacitive Touch User Interfaces
The PIC18LF26K40-I/SS is a strong fit for capacitive touch user interfaces because the integrated 10-bit ADC with Computation (ADCC) peripheral runs Capacitive Voltage Divider (CVD) scans entirely in hardware, freeing the CPU to remain in sleep between scans. With mTouch libraries a single chip can scan 8-12 touch buttons plus a slider while drawing under 10 uA average, and the 64 KB Flash holds the entire mTouch + application state machine. Compared to discrete touch ICs, this approach collapses the BOM to one chip; the 28-SSOP exposes enough GPIOs for both touch channels and indicator LEDs without a port expander.
Được đề xuất
Industrial Sensor and Control Boards
For industrial sensor and control boards the PIC18LF26K40-I/SS combines a 64 MHz PIC18 core with the CWG, CCP, PWM, ZCD and hardware limit timer peripherals needed to drive small motor-control or power-conversion stages from a single chip. Its -40 to +85 C industrial operating range, 28-SSOP footprint, and 1.8-3.6 V supply match 24 V industrial bus systems stepped down to 3.3 V. The SCAN/CRC peripheral performs background memory integrity checks for functional-safety designs, and 256 B EEPROM holds configuration parameters without external storage. Compared to discrete logic the integrated CIP block eliminates the timer-interrupt glue code.
Được đề xuất
Low-Power Wireless Remote Controls
The PIC18LF26K40-I/SS targets low-power wireless remote controls because its XLP sleep current below 50 nA typical lets a coin-cell-powered IR/BLE remote run for years, while the 64 MHz core bursts awake to transmit and returns to sleep within microseconds. The 28-SSOP provides enough GPIO for key-scan matrices up to 8x8 and indicator LEDs without external logic, and the on-chip comparators debounce mechanical switches in hardware. Compared to a 32-bit Cortex-M0+ the smaller Flash footprint and simpler toolchain (MPLAB X + XC8) shrink per-unit cost on high-volume SKUs and the 1.8-3.6 V VDD eliminates the LDO on a 2xAA supply.
Được đề xuất
Small Motor and Fan Control
The PIC18LF26K40-I/SS handles small motor and fan-control designs through its CWG (Complementary Waveform Generator), CCP/PWM, ZCD (Zero-Cross Detect), and hardware limit timer peripherals, which together can drive a BLDC or PFC stage without CPU intervention. The 64 MHz core and 10-bit ADCC close the current-control loop in firmware while the CIPs handle the switching dead-time and protection, and the 28-SSOP exposes pins for 3-phase gate drivers. Compared to a generic MCU plus external gate-driver logic, this part cuts BOM count by 2-3 ICs and the 1.8-3.6 V VDD accepts a 3.3 V regulated rail directly.
Được đề xuất
Consumer Appliance Front Panels
For consumer appliance front panels the PIC18LF26K40-I/SS combines mTouch capacitive scanning, indicator-LED driving via the 5-bit DAC, UART-bridge communication, and a wide 1.8-3.6 V supply range that accepts both 3.3 V regulated and 2xAA battery inputs. The 64 KB Flash holds a full menu/UI state machine plus a LIN or UART slave stack, and the 28-SSOP mechanical drawing matches the front-panel cutout dimensions used by several white-goods OEMs. Compared to an STM8 or 8051 the integrated ADCC removes the need for a separate touch controller and the eXtreme Low-Power modes simplify standby-power certification.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF26K40-I/SS — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F26K40-I/SS | PIC18LF26K40-I/MV | PIC18LF26K40-E/SS | PIC18LF25K40-I/SS |
|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-UQFN - same pinout | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB (-50%) |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB (-50%) |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| VDD Range | 1.8-3.6 V | 1.8-5.5 V | 1.8-3.6 V | 1.8-3.6 V | 1.8-3.6 V |
| Max Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Temperature Grade | -40 to +85 C (I) | -40 to +85 C (I) | -40 to +85 C (I) | -40 to +125 C (E) | -40 to +85 C (I) |
| ADC | — | 10-bit ADCC | 10-bit ADCC | 10-bit ADCC | 10-bit ADCC |
| Unit Price (qty 1000) | $1.38 | $1.42 | $1.45 | $1.85 | $1.20 |
Bảo phân biệt quan trọng
- Wider VDD range with same pinout for Li-ion/USB use (vsPIC18F26K40-I/SS)
- Extended temperature grade in same package (vsPIC18LF26K40-E/SS)
- Half-Flash variant cuts unit cost (vsPIC18LF25K40-I/SS)
- Integrated ADCC eliminates external touch controller (vsDiscrete touch IC approach)
Ghi chú thiết kế
Estimated: at 64 MHz active current is ~7 mA at 3.3 V (~23 mW); at 1 MHz / 3.3 V it drops to ~0.4 mA. In sleep mode (Sleep + WDT disabled) the nanoWatt XLP spec sheet figure is <50 nA typical, ideal for battery hold-up. For battery designs, drive MCLR through a 10 kohm pull-up rather than tying it directly to VDD to keep the in-circuit serial programming (ICSP) entry path intact. Source: Microchip PIC18(L)F26/45/46K40 datasheet Section 36 (DC characteristics).
Place a 100 nF decoupling capacitor on each VDD pin (pins 8 and 19 on the 28-SSOP) within 3 mm of the package body, and connect both VSS pins (7 and 20) to a solid uninterrupted ground pour to reduce digital switching noise on the ADC readings. The exposed pad is not present on SSOP but is on the MV/UQFN variant - if migrating to UQFN, solder the exposed pad to a 4x4 via array stitched to the ground pour for thermal relief. Source: Microchip PIC18 K40 family PCB layout guidelines.
Do not assume LF and F variants are interchangeable: the PIC18LF26K40 (1.8-3.6 V) will be damaged by a fresh Li-ion cell above 3.6 V, while the PIC18F26K40 (1.8-5.5 V) survives a 5 V rail. Always confirm the full ordering part number including the F/LF voltage letter and the I/E temperature letter before PCB release. Also note that the 28-SSOP and 28-UQFN (MV) packages are pin-compatible but not footprint-compatible - the UQFN requires a different land pattern. Source: Microchip PIC18 K40 datasheet ordering information.
The 10-bit ADCC performance is sensitive to the impedance of the analog source; keep source impedance below 2.5 kohm and add a 100 nF ceramic bypass on each analog input pin (RA0-RA7) for clean CVD scans. For capacitive-touch designs, route the touch electrodes as short straight traces with a ground hatch around each electrode, and keep digital switching traces (PWM, oscillator) at least 5 mm away. Source: Microchip mTouch design guidelines.
Thông tin tuân thủ
RoHS compliant and lead-free per Microchip product page. Not AEC-Q100 qualified - choose PIC18F26K40 automotive-grade variants if AEC-Q100 is required. Conflict-minerals declaration available from Microchip.
