PIC18LF47K40-E/PT - 128KB Flash 8-bit XLP MCU | Microchip
MPN: PIC18LF47K40-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.61 | $36.10 |
| 100 | $3.16 | $316.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.43 | $2,430.00 |
PIC18LF47K40-E/PT Overview
An 8-bit microcontroller (MCU) is a single-chip computer that uses an 8-bit data path and is widely deployed in cost-sensitive, low-power embedded products. The PIC18 family is Microchip's high-performance 8-bit line, sitting hierarchically under microcontroller -> embedded processor -> semiconductor. The LF prefix denotes the low-voltage (1.8 V to 3.6 V) variant of the K40 family, while the F variant (PIC18F47K40) extends the range to 5 V. Both share the same peripherals, allowing drop-in PCB migration when the supply rail changes.
Key features include eXtreme Low Power (XLP) technology with nanoWatt XLP sleep currents, Core Independent Peripherals (CIPs) such as CWG, WWDT, CRC/Memory Scan, ZCD, and Hardware CVD, plus 256 B of high-endurance EEPROM and a peripheral pin select that remaps digital functions to any I/O. The integrated 10-bit ADC2 performs automated averaging and threshold comparison, offloading CPU overhead.
Typical applications include low-power IoT sensor nodes, consumer white goods, motor control signal conditioning, human-machine interface panels, and battery-powered instrumentation. The 44-pin TQFP gives 36 usable I/O, enough to drive LCDs, keypads, and multiple sensor interfaces without external glue logic.
When designing with this part, ensure the supply stays within 1.8 V to 3.6 V and use MPLAB X IDE with XC8 compiler. Decouple VDD with a 100 nF + 1 uF pair placed within 5 mm of the pins, and follow the pinout in section 1.0 of the manufacturer datasheet. The PIC18LF47K40-E/PT is the extended (-40C to +125C) operating-range grade, making it suitable for industrial and automotive under-hood environments.
This page synthesizes distributor pricing, drop-in same-brand and cross-brand alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC18LF47K40-E/PT — 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 PIC18LF47K40-E/PT (same form factor and footprint) — differing in ADC, Package, Program Memory (Flash), Core, RAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F47K40-E/PT
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC18LF47K40-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.65 / Unit
View Datasheet →PIC18LF47K40T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.46 / Unit
View Datasheet →PIC18LF46K40-E/PT
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC18LF45K40-E/PT
✅ Drop-In✓ In Stock
$1.86 / Unit
View Datasheet →PIC18LF46K42-I/PT
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →PIC18F47J53-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF47K40-E/PT Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit |
| Program Memory Size | 128 KB (64K x 16) Flash |
| RAM Size | 4 KB (3728 bytes) |
| EEPROM Size | 256 bytes |
| Maximum CPU Speed | 64 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 36 |
| ADC | 10-bit ADC2 with Computation |
| DAC | 5-bit DAC |
| Comparators | Yes |
| CCP / PWM / CWG | Yes |
| WWDT / ZCD / CRC-Scan | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Communication | EUSART, SPI, I2C |
| Package | 44-TQFP (10x10 mm) |
| Operating Temperature | -40C to +125C (Extended, -E suffix) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18LF47K40-E/PT Pin Configuration
| Pin 1 | RB7 — General purpose I/O / ICSP data |
| Pin 2 | RB6 — General purpose I/O / ICSP clock |
| Pin 3 | RB5 — General purpose I/O |
| Pin 4 | RB4 — General purpose I/O |
| Pin 5 | RB3 — General purpose I/O |
| Pin 6 | RB2 — General purpose I/O |
| Pin 7 | RB1 — General purpose I/O |
| Pin 8 | RB0 — General purpose I/O / interrupt-on-change |
| Pin 9 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RA7 — General purpose I/O / oscillator |
| Pin 12 | RA6 — General purpose I/O / oscillator |
| Pin 13 | RA5 — General purpose I/O |
| Pin 14 | RA4 — General purpose I/O |
| Pin 15 | RA3 — General purpose I/O / VPP |
| Pin 16 | RA2 — General purpose I/O |
| Pin 17 | RA1 — General purpose I/O / ICSPCLK |
| Pin 18 | RA0 — General purpose I/O / ICSPDAT |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pin 21 | RC7 — General purpose I/O |
| Pin 22 | RC6 — General purpose I/O |
| Pin 23 | RC5 — General purpose I/O |
| Pin 24 | RC4 — General purpose I/O |
| Pin 25 | RC3 — General purpose I/O / SCL |
| Pin 26 | RC2 — General purpose I/O / SDA |
| Pin 27 | RC1 — General purpose I/O |
| Pin 28 | RC0 — General purpose I/O |
| Pin 29 | OSC1 — Crystal oscillator input |
| Pin 30 | OSC2 — Crystal oscillator output |
| Pin 31 | VSS — Ground reference |
| Pin 32 | RD7 — General purpose I/O / PSP |
| Pin 33 | RD6 — General purpose I/O / PSP |
| Pin 34 | RD5 — General purpose I/O / PSP |
| Pin 35 | RD4 — General purpose I/O / PSP |
| Pin 36 | RD3 — General purpose I/O / PSP |
| Pin 37 | RD2 — General purpose I/O / PSP |
| Pin 38 | RD1 — General purpose I/O / PSP |
| Pin 39 | RD0 — General purpose I/O / PSP |
| Pin 40 | VSS — Ground reference |
| Pin 41 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pin 42 | RE3 — General purpose I/O / MCLR |
| Pin 43 | RE2 — General purpose I/O |
| Pin 44 | RE1 — General purpose I/O |
Typical Applications
PIC18LF47K40-E/PT is suitable for 6 applications: Battery-Powered IoT Sensor Node, Industrial Sensor Hub with HMI, Home Appliance Control Board, Automotive Under-Hood Module, USB to Serial Bridge / Bootloader Host, Educational / Maker Development Platform.
Battery-Powered IoT Sensor Node
The PIC18LF47K40-E/PT fits IoT sensor nodes because its 1.8 V to 3.6 V supply range aligns with single-cell Li-ion or 2x AA batteries, while its XLP nanoWatt sleep current below 100 nA extends coin-cell lifetime. The 128 KB Flash holds OTA bootloader plus sensor-fusion firmware, and the 10-bit ADC2 with Computation performs threshold detection autonomously, waking the CPU only when a sensor event occurs. The 64 MHz core delivers enough MIPS for BLE command processing, and Peripheral Pin Select remaps SPI or I2C to any I/O, freeing board layout. Per the Microchip datasheet, the integrated ZCD and CWG reduce external component count. Pair with an MCP9808 temperature sensor and an RN4870 BLE module for a complete coin-cell node.
Recommended
Industrial Sensor Hub with HMI
The PIC18LF47K40-E/PT is well suited for industrial sensor hubs because it exposes 36 I/O pins to drive keypads, character LCDs, and multiple analog sensors simultaneously. The 128 KB Flash and 4 KB RAM comfortably run Modbus RTU stacks plus a small GUI library, and the integrated 10-bit ADC2 with Computation averages readings in hardware, offloading CPU overhead. The -40C to +125C extended temperature grade (E suffix) handles under-hood and factory-floor environments. The Peripheral Pin Select lets the EUSART, SPI, and I2C peripherals be reassigned to any pin, simplifying PCB routing for dense HMI panels. According to the Microchip datasheet, the CRC/Memory Scan peripheral catches Flash corruption in safety-relevant installations.
Recommended
Home Appliance Control Board
The PIC18LF47K40-E/PT fits white-goods control boards because it integrates the timers, comparators, and zero-cross detect (ZCD) needed for triac-fired heater and motor control. The 64 MHz core handles PID loops for washing-machine drum speed or induction-cooktop power regulation while leaving MIPS headroom for user-interface tasks. The CWG (Complementary Waveform Generator) and PWM modules drive power-MOSFET half-bridges directly, and the extended -E temperature grade ensures reliability behind the appliance rear panel where ambient can reach 70C. Per the Microchip datasheet, the Hardware CVD peripheral simplifies capacitive touch-button sensing on glass panels, eliminating mechanical switches.
Recommended
Automotive Under-Hood Module
The PIC18LF47K40-E/PT (extended -40C to +125C grade) is appropriate for automotive under-hood modules such as seat-heater controllers, mirror adjusters, and lighting drivers where AEC-Q100 is not mandated but extended temperature is required. The 36 I/O pins multiplex multiple LIN-style switches and LEDs, while the EUSART can implement a LIN slave via firmware. The 5-bit DAC generates bias references for sensor bridges, and the 10-bit ADC2 reads battery voltage and thermistor inputs with hardware averaging. According to the Microchip datasheet, the WWDT (Windowed Watchdog Timer) catches runaway code faster than a conventional WDT, satisfying OEM diagnostic requirements. For AEC-Q100 qualified applications, step up to the PIC18F47K40-E/PT Q1 variant.
Recommended
USB to Serial Bridge / Bootloader Host
While the PIC18LF47K40-E/PT itself does not include USB, an external MCP2200 or MCP2221 USB-UART bridge lets it serve as a serial bootloader host for field firmware updates. The 4 KB RAM holds buffered image data during the reflash, and the 128 KB Flash on the target supplies ample room for dual-image bootloading. The hardware CRC/Memory Scan peripheral validates incoming firmware before commit, and the ZCD triggers a controlled brown-out if the mains drops during the update. Per the Microchip datasheet, the ICSP/ICD pins double as debug ports, allowing in-circuit programming without removing the part from the board.
Recommended
Educational / Maker Development Platform
The PIC18LF47K40-E/PT is widely deployed on Microchip Curiosity HPC and Explorer development boards, making it ideal for educational labs and maker projects. The 44-TQFP breakout is breadboard-friendly via standard 0.1-inch headers, and the MPLAB X IDE with the free XC8 compiler supports full C development without license fees. The PIC18 architecture has 30+ years of documentation, application notes, and community code, lowering the learning curve for students. According to the Microchip datasheet, the on-chip debug (ICD) and Peripheral Pin Select let beginners re-route peripherals via software, avoiding soldering rework. The XLP nanoWatt mode also teaches real-world low-power design patterns.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF47K40-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F47K40-E/PT | PIC18LF47K40-I/PT | PIC18LF46K40-E/PT | PIC18LF45K40-E/PT | PIC18LF46K42-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 32 KB (-75%) | 64 KB (-50%) |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB (-50%) | 4 KB |
| Operating Voltage | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 |
| Operating Temperature | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| ADC | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 | 12-bit ADC2 (improved) |
Key Differentiators
- Largest Flash in the 44-TQFP LF K40 sub-family (vs PIC18LF46K40-E/PT)
- Same die and pinout as 5V sibling for design reuse (vs PIC18F47K40-E/PT)
- Extended -E temperature grade for industrial deployments (vs PIC18LF47K40-I/PT)
- Core Independent Peripherals reduce CPU load (vs PIC18LF46K22-E/P)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin (pins 9, 20, 41) and a single 1 uF to 10 uF bulk capacitor at the package. Per Microchip datasheet section 2.0, the LF grade requires the supply to remain above 1.8 V under all load transients; if powering from a switching regulator, ensure the LDO or ferrite bead holds VDD above the brown-out threshold during MCU wake-up peaks of 15-20 mA.
Route the ICSP/ICD pins (RB6/RB7 and RA0/RA1) to an in-circuit debug header with no series resistors above 100 ohm. According to the Microchip datasheet, the ICSP clock and data lines must be free of series resistance for reliable in-circuit programming; place the debug header at the board edge for probe access. Keep the crystal traces (OSC1/OSC2) short and surround them with a ground pour to minimize EMI.
Estimated: at 64 MHz CPU and 3.6 V supply with all peripherals active, the PIC18LF47K40-E/PT draws approximately 15 mA, dissipating 54 mW in the 44-TQFP package. With a 44-TQFP (10x10) thermal resistance of approximately 50 C/W (typical for JEDEC EIA/JESD51 4-layer test board), junction temperature rise is about 2.7C above ambient - well within the -40C to +125C extended grade, so no heatsink is required.
Do not confuse the PIC18LF47K40 (1.8 V to 3.6 V) with the PIC18F47K40 (2.3 V to 5.5 V) - applying 5 V to the LF grade will permanently damage the part. According to the Microchip datasheet, the LF grade is mandatory for designs that boot below 2.3 V; verify the supply rail before migrating. Also, leave pin 18 (RA0/ICSPDAT) and pin 17 (RA1/ICSPCLK) accessible if you plan to field-update firmware.
When using the EUSART at 115200 baud or higher, place a 100 ohm source termination in series with the TX line if the trace exceeds 50 mm. Per Microchip datasheet section 25.0, the SPI peripheral can operate up to FOSC/4; if running the SPI bus above 10 MHz, keep clock traces under 30 mm and use a ground trace between MOSI/MISO to suppress crosstalk. The Peripheral Pin Select lets you move these functions to cleaner pins after PCB layout.
Compliance Information
RoHS and REACH compliant per Microchip material declaration. Not AEC-Q100 qualified; for AEC-Q100 automotive use, see the PIC18F47K40-E/PT Q1 grade variant.