PIC18LF47K40-E/MV - 8-Bit 64MHz XLP MCU 128KB Flash | Microchip
MPN: PIC18LF47K40-E/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.65 | $26.50 |
| 100 | $2.35 | $235.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.9 | $1,900.00 |
PIC18LF47K40-E/MV Overview
What is a PIC18 XLP microcontroller? An XLP (eXtreme Low-Power) PIC18 is a member of the 8-bit PIC18 family that integrates nanoWatt sleep modes, low-current brown-out reset, and a wide 1.8V-3.6V operating range to maximize battery life. The PIC18 family is the high-performance 8-bit tier above PIC16, sitting under the 16-bit dsPIC/PIC24 and 32-bit PIC32/SAM families in the Microchip MCU hierarchy. XLP technology targets IoT nodes, wearables, remote sensors, and energy-harvesting systems where standby current dominates energy budget.
Key features include a 10-bit ADC with Computation (ADCC) automating Capacitive Voltage Divider (CVD) for advanced touch sensing, a 5-bit DAC, two comparators, two PWM modules, CCP, CWG (Complementary Waveform Generator), Windowed Watchdog Timer (WWDT), CRC/Memory Scan, Zero-Cross Detect (ZCD), and Peripheral Pin Select (PPS) for flexible signal routing. The PIC18LF47K40 also integrates EUSART plus dual SPI/I2C interfaces, 35 I/O pins, IDLE/DOZE/PMD power-management modes, and a 64MHz internal oscillator. The 'LF' prefix denotes the low-voltage (1.8V-3.6V) variant, while the 'F' only variant (PIC18F47K40) extends to 5V operation.
Architecture-wise the device uses a modified Harvard RISC core with 16-bit instructions, hardware multiply, and a C-compiler-friendly instruction set. Core Independent Peripherals let CIPs communicate and trigger each other without CPU intervention, allowing the core to remain in sleep for extended periods, which is critical for battery life. PPS provides remapping of digital peripherals to multiple pins, simplifying PCB layout and BOM.
Typical applications include low-power IoT sensor nodes, capacitive touch user interfaces, battery-powered consumer devices, home automation controllers, and small industrial control nodes. The 40-pin UQFN with 35 I/Os offers generous signal routing for mixed analog/digital designs and is well suited to compact SMD assemblies.
When designing with this device, observe the 1.8V-3.6V supply window on the LF variant, place the exposed pad (EP) on a top-layer copper pour connected to VSS, and reserve one ICP/ICD pin pair for in-circuit debug. Use PPS to reassign peripheral functions and reuse existing footprints when migrating to 28- or 44-pin cousins.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18LF47K40-E/MV — 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/MV (same form factor and footprint) — differing in ADC, DAC, Package, Program Memory (Flash), Communication.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F47K40-I/MV
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF47K40-I/MV
✅ Drop-In✓ In Stock
$2.02 / Unit
View Datasheet →PIC18LF47K40T-I/MV
✅ Drop-In✓ In Stock
$2.32 / Unit
View Datasheet →PIC18F46K40-E/MV
✅ Drop-In✓ In Stock
$1.86 / Unit
View Datasheet →PIC18LF46K42-I/MV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18LF46K40-I/MV
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC18LF47K40-E/MV Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 128 KB (64K x 16) |
| Data RAM | 4 KB |
| Data EEPROM | 256 B |
| Operating Voltage Range (LF) | 1.8 V to 3.6 V |
| I/O Pins | 35 |
| ADC | 10-bit with Computation (ADCC) |
| DAC | 5-bit |
| Comparators | 2 |
| PWM Channels | 2 |
| Communication Interfaces | 1x EUSART, 2x SPI, 2x I2C |
| Package | 40-pin UQFN (MV) 5x5 mm with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +125 C |
| Technology | eXtreme Low-Power (XLP) |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
PIC18LF47K40-E/MV Pin Configuration
| Pin 1 | RA0/AN0/C1IN0-/C2IN0-/ZCD/ICPORT — Analog/digital I/O; AN0, comparator, ZCD |
| Pin 2 | RA1/AN1/C1IN1-/C2IN1-/ICPORT — Analog/digital I/O |
| Pin 3 | RA2/AN2/DAC5REF0-/C1IN0+/C2IN0+ — Analog I/O, DAC reference, comparator |
| Pin 4 | RA3/AN3/DAC5REF0+/C1IN1+ — Analog I/O, DAC reference |
| Pin 5 | RA4/AN4/C1OUT — Analog I/O, comparator output |
| Pin 6 | RA5/AN5/DAC5OUT1/C2OUT — Analog I/O, DAC output, comparator output |
| Pin 7 | RA6/AN6/CLKR — Analog I/O, clock reference |
| Pin 8 | RA7/AN7 — Analog I/O |
| Pin 9 | VDD — Positive supply (1.8V-3.6V) |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RB0/AN12/C2IN3+/ZCD/ICSPCLK — Digital I/O, ICSPCLK programming clock |
| Pin 12 | RB1/AN10/C1IN3+/ICSPDAT — Digital I/O, ICSPDAT programming data |
| Pin 13 | RB2/AN8/C1IN2- — Digital/analog I/O |
| Pin 14 | RB3/AN9/C1IN2+ — Digital/analog I/O |
| Pin 15 | RB4/AN11 — Digital/analog I/O |
| Pin 16 | RB5/AN13 — Digital/analog I/O |
| Pin 17 | RB6/ICSCLK — In-circuit serial programming clock (legacy ICD) |
| Pin 18 | RB7/ICSDAT — In-circuit serial programming data (legacy ICD) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply (1.8V-3.6V) |
| Pin 21 | RC0/PWM1/CWG1A — Digital I/O, PWM, CWG |
| Pin 22 | RC1/PWM2/CWG1B — Digital I/O, PWM, CWG |
| Pin 23 | RC2/AN14/CMP2 — Analog/digital I/O |
| Pin 24 | RC3/AN15 — Analog/digital I/O |
| Pin 25 | RC4 — Digital I/O |
| Pin 26 | RC5 — Digital I/O |
| Pin 27 | RC6 — Digital I/O |
| Pin 28 | RC7 — Digital I/O |
| Pin 29 | VSS — Ground reference |
| Pin 30 | VDD — Positive supply (1.8V-3.6V) |
| Pin 31 | RD0 — Digital I/O |
| Pin 32 | RD1 — Digital I/O |
| Pin 33 | RD2 — Digital I/O |
| Pin 34 | RD3 — Digital I/O |
| Pin 35 | RD4 — Digital I/O |
| Pin 36 | RD5 — Digital I/O |
| Pin 37 | RD6 — Digital I/O |
| Pin 38 | RD7 — Digital I/O |
| Pin 39 | RE0 — Digital I/O |
| Pin 40 | RE1 — Digital I/O |
Typical Applications
PIC18LF47K40-E/MV is suitable for 6 applications: Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, Home Automation Controller, Industrial Sensor Signal Conditioner, Small Industrial Control Node, Wearable Health Monitor.
Battery-Powered IoT Sensor Node
The PIC18LF47K40-E/MV fits battery-powered IoT sensor nodes because its XLP nanoWatt sleep current (sub-microamp with RTCC and wake-on-interrupt) extends coin-cell life by 5-10x compared with non-XLP 8-bit MCUs. The 128KB Flash accommodates BLE/Zigbee protocol stacks or LoRaWAN firmware, while the 10-bit ADCC with CVD enables moisture, temperature, and gas-sensor signal chains. PMD gates unused peripherals to further reduce quiescent draw, and PPS routes the EUSART/SPI/I2C pins to match a small 2-layer PCB footprint.
Recommended
Capacitive Touch User Interface
The PIC18LF47K40-E/MV is well suited for capacitive touch UI panels because the ADCC peripheral automates CVD scanning for mTouch buttons, sliders, and proximity sensors without CPU intervention. The Core Independent Peripherals can sequence scans, wake the core only when a touch is detected, and process thresholds autonomously. Its 1.8V-3.6V supply window matches single-cell Li-ion or 2x AA battery packs, and the 35 I/Os drive a 16-key matrix plus LED feedback channels.
Recommended
Home Automation Controller
The PIC18LF47K40-E/MV serves as the central MCU in home automation controllers because the dual I2C/SPI buses drive sensor hubs, EEPROM, and display drivers, while the EUSART links to a sub-GHz radio or Wi-Fi co-processor. The 128KB Flash stores Zigbee Z-Stack or Matter-over-Thread application profiles, and 4KB RAM buffers network tables. PPS remaps peripheral functions across the 35 I/Os to keep the PCB 2-layer and reduce BOM cost versus 32-bit Cortex-M0 alternatives.
Recommended
Industrial Sensor Signal Conditioner
The PIC18LF47K40-E/MV is appropriate for industrial sensor signal conditioning because its 10-bit ADCC handles 4-20mA loop sensors, RTDs, and bridge transducers while the two comparators and 5-bit DAC generate setpoint thresholds. The CWG peripheral synthesizes excitation waveforms for sensor bridges, and the CRC/Memory Scan detects firmware integrity in long-lifecycle installations. The -40C to +125C extended temperature grade suits outdoor enclosures and factory-floor cabinets.
Recommended
Small Industrial Control Node
The PIC18LF47K40-E/MV targets small industrial control nodes (valve actuators, motor starters, pump controllers) because its two PWM outputs with CWG complement drive H-bridges or PFC stages, while the ZCD peripheral synchronizes to AC line frequency. The 128KB Flash stores Modbus RTU or CANopen application stacks, and the 64MHz CPU clock provides headroom for closed-loop control. The wide 1.8V-3.6V supply window and PMD modes help meet IEC 61000 EMC and standby budgets.
Recommended
Wearable Health Monitor
The PIC18LF47K40-E/MV fits wearable health monitors because its XLP nanoWatt sleep and IDLE/DOZE modes stretch a CR2032 coin cell across multi-month deployments. The 10-bit ADCC reads heart-rate, SpO2, and motion sensor analog outputs while the EUSART links to a BLE or ANT radio SoC. The compact 40-pin UQFN 5x5mm footprint suits wristband and patch form factors, and PPS allows sensor and radio pinout reassignment to fit curved PCB layouts.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF47K40-E/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F47K40-I/MV | PIC18LF47K40-I/MV | PIC18LF47K40T-I/MV | PIC18F46K40-E/MV | PIC18LF46K42-I/MV | PIC18LF46K40-I/MV |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin UQFN (MV) 5x5 mm | 40-pin UQFN (MV) 5x5 mm - same | 40-pin UQFN (MV) 5x5 mm - same | 40-pin UQFN (MV) 5x5 mm - same | 40-pin UQFN (MV) 5x5 mm - same | 40-pin UQFN (MV) 5x5 mm - same | 40-pin UQFN (MV) 5x5 mm - same |
| Program Flash | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB | 64 KB | 64 KB |
| Data RAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Operating Voltage | 1.8 V to 3.6 V (LF) | 2.3 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 2.3 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) |
| Maximum Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| ADC | 10-bit ADCC (CVD) | 10-bit ADCC (CVD) | 10-bit ADCC (CVD) | 10-bit ADCC (CVD) | 10-bit ADCC (CVD) | 10-bit ADCC (CVD) | 10-bit ADCC (CVD) |
| I/O Pins | 35 | 35 | 35 | 35 | 35 | 35 | 35 |
| XLP Low-Power Tech | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Extended temperature grade for harsh environments (vs PIC18LF47K40-I/MV)
- Full 128KB Flash at the LF low-voltage tier (vs PIC18LF46K40-I/MV)
- Low-voltage XLP operation with 35 I/Os (vs PIC18LF27K40-I/SO)
Design Notes
The PIC18LF47K40-E/MV must be powered within 1.8V-3.6V on the LF variant; below 2.7V the maximum FCY derates to maintain internal timing margins. Place a 100nF decoupling capacitor within 3mm of each VDD/VSS pin pair (4 pairs total in the 40-pin UQFN layout), plus a bulk 4.7uF-10uF tantalum or polymer cap on the main rail. For battery designs, use a low-Iq LDO such as MCP1700 or MCP1640 to keep quiescent current below the MCU's own nanoWatt sleep floor.
The 40-pin UQFN (MV) package has an exposed thermal pad (EP) on the underside that MUST be soldered to a top-layer copper pour tied to VSS. Failure to solder the EP leads to thermal stress, mechanical reliability issues, and degraded electrical ground reference. The EP pour should be a 3x3mm minimum area with thermal vias stitching to an inner VSS plane. Reserve ICP/ICD test pads (ICSPCLK on RB6, ICSPDAT on RB7) at the board edge for production programming.
Group analog inputs (RA/RC/RE ANx pins) on one side of the MCU and route them over a continuous ground pour to minimize digital coupling into the 10-bit ADC. Route the high-current PWM outputs (RC0/RC1) with short, wide traces and place gate-drive resistors within 5mm of the MCU pin to limit ringing. Use Microchip's PPS (Peripheral Pin Select) feature to remap EUSART/SPI/I2C signals away from analog pins and simplify PCB routing on tight 2-layer boards.
A common pitfall is leaving the WWDT (Windowed Watchdog Timer) enabled without configuring its window in software - the MCU will reset on every refresh outside the window. Disable WWDT in configuration words if not used, or set the window register to a value greater than the worst-case service loop time. Another pitfall is forgetting that the LF variant's BOR (Brown-Out Reset) voltage defaults may not match battery cutoff voltage; verify the BOR setting in CONFIG2 against the battery's end-of-discharge curve.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose automotive-grade PIC18F variants with -V suffix for AEC-Q100 needs.
