PIC18LF65K40-E/PT - 64MHz 8-bit XLP MCU, 32KB Flash | Microchip
MPN: PIC18LF65K40-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.85 | $2,850.00 |
PIC18LF65K40-E/PT Overview
An 8-bit microcontroller (MCU) is a single-chip computer based on an 8-bit data bus architecture, integrating a CPU, memory, and peripherals into one package. The PIC18LF family sits within Microchip's 8-bit PIC hierarchy: PIC18 -> PIC18F (Flash) / PIC18LF (low-voltage Flash) -> 8-bit PIC MCU -> Microcontroller -> Integrated Circuit. The 'LF' prefix denotes low-voltage operation (down to 1.8 V) suited for battery-powered and energy-harvesting applications, while XLP technology minimizes sleep current for ultra-low standby power.
Key features of the PIC18LF65K40 include Core Independent Peripherals (CWG, NCO, CLC) that offload tasks from the CPU, an IDLE/DOZE/PMD power management block, hardware CRC/SCAN for memory integrity, and Peripheral Pin Select (PPS) for flexible signal routing. The integrated ECAN module and dual EUSART enable robust wired communication for industrial networking, while the 5-bit DAC and zero-crossing detector (ZCD) simplify analog control loops without external components.
The architecture combines a RISC Harvard-bus CPU with hardware multiply and a 31-level interrupt vector table, giving deterministic real-time response. The 64-pin TQFP package offers ample I/O (up to 60 GPIO) while keeping the board footprint compact at 10x10 mm with 0.5 mm pitch. ECC Flash and RAM support data retention and resilience against soft errors for industrial control, sensor hubs, and HMI applications.
Typical applications include industrial control and automation, automotive body and sensor nodes, low-power IoT sensor nodes, HMI/keypad controllers, and consumer electronics with touch/proximity sensing. The wide 1.8 V-5.5 V supply allows direct Li-ion battery operation without external regulation, while 5 V tolerance on digital I/O simplifies interfacing to legacy 5 V logic.
When designing with this MCU, plan for an external decoupling network of 100 nF and 10 uF near VDD pins, route the analog AVSS/AVDD pair separately from digital supplies, and use the PPS feature to remap peripheral pins without re-spinning the PCB. Choose PIC18F65K40 (non-LF) only if you do not need 1.8 V operation, otherwise the LF variant preserves battery life and BOM cost in low-voltage designs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18LF65K40-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 PIC18LF65K40-E/PT (same form factor and footprint) — differing in ADC, Communication, Family, I/O Pins, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF66K40-E/PT
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →PIC18LF67K40-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF65K40-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F65K40-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF65K40-E/MR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF65K40-E/PT Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC18LF65K40 / PIC18LF66K40 |
| Core | PIC RISC 8-bit |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 2 KB |
| EEPROM | 256 B |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | Up to 60 |
| ADC | 10-bit ADC2 (with Computation) |
| DAC | 5-bit DAC |
| Comparators | Yes |
| PWM / CCP / CWG | Yes (PWM, CCP, CWG peripherals) |
| Timers | Integrated Timers and Capture/Compare/PWM |
| Communication | ECAN, EUSART, SPI, I2C |
| Special Peripherals | ZCD, PPS, WWDT, SCAN/CRC, HLT, IDLE/DOZE/PMD |
| Package | 64-pin TQFP (PT), 10x10 mm, 0.5 mm pitch |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +125 C (E = extended) |
| RoHS Status | Compliant |
PIC18LF65K40-E/PT Pin Configuration
| Pin 1 | MCLR — Master Clear (Reset) input, active-low |
| Pin 2 | RA0 — PORTA0 / analog input |
| Pin 3 | RA1 — PORTA1 / analog input |
| Pin 4 | RA2 — PORTA2 / analog input |
| Pin 5 | RA3 — PORTA3 / analog input |
| Pin 6 | RA4 — PORTA4 / analog input |
| Pin 7 | RA5 — PORTA5 / analog input |
| Pin 8 | RA6 — PORTA6 / analog input |
| Pin 9 | RA7 — PORTA7 / analog input |
| Pin 10 | VSS — Ground |
| Pin 11 | VDD — Positive supply |
| Pin 12 | RB0 — PORTB0 / IOC |
| Pin 13 | RB1 — PORTB1 / IOC |
| Pin 14 | RB2 — PORTB2 / IOC |
| Pin 15 | RB3 — PORTB3 / IOC |
| Pin 16 | RB4 — PORTB4 / IOC |
| Pin 17 | RB5 — PORTB5 / IOC / PWM |
| Pin 18 | RB6 — PORTB6 / IOC / PGC |
| Pin 19 | RB7 — PORTB7 / IOC / PGD |
| Pin 20 | VSS — Ground |
| Pin 21 | VDD — Positive supply |
| Pin 22 | RC0 — PORTC0 |
| Pin 23 | RC1 — PORTC1 |
| Pin 24 | RC2 — PORTC2 |
| Pin 25 | RC3 — PORTC3 |
| Pin 26 | RC4 — PORTC4 |
| Pin 27 | RC5 — PORTC5 |
| Pin 28 | RC6 — PORTC6 / TX |
| Pin 29 | RC7 — PORTC7 / RX |
| Pin 30 | VSS — Ground |
| Pin 31 | VDD — Positive supply |
| Pin 32 | RD0 — PORTD0 |
| Pin 33 | RD1 — PORTD1 |
| Pin 34 | RD2 — PORTD2 |
| Pin 35 | RD3 — PORTD3 |
| Pin 36 | RD4 — PORTD4 |
| Pin 37 | RD5 — PORTD5 / PWM |
| Pin 38 | RD6 — PORTD6 / PWM |
| Pin 39 | RD7 — PORTD7 / PWM |
| Pin 40 | VSS — Ground |
| Pin 41 | VDD — Positive supply |
| Pin 42 | RE0 — PORTE0 / analog |
| Pin 43 | RE1 — PORTE1 / analog |
| Pin 44 | RE2 — PORTE2 / analog |
| Pin 45 | RE3 — PORTE3 / analog |
| Pin 46 | AVSS — Analog ground |
| Pin 47 | AVDD — Analog positive supply |
| Pin 48 | OSC1 — Crystal/oscillator input |
| Pin 49 | OSC2 — Crystal/oscillator output |
| Pin 50 | RF0 — PORTF0 |
| Pin 51 | RF1 — PORTF1 |
| Pin 52 | RF2 — PORTF2 |
| Pin 53 | RF3 — PORTF3 |
| Pin 54 | RF4 — PORTF4 |
| Pin 55 | RF5 — PORTF5 |
| Pin 56 | RF6 — PORTF6 |
| Pin 57 | RF7 — PORTF7 |
| Pin 58 | RG0 — PORTG0 |
| Pin 59 | RG1 — PORTG1 |
| Pin 60 | RG2 — PORTG2 |
| Pin 61 | RG3 — PORTG3 |
| Pin 62 | RG4 — PORTG4 |
| Pin 63 | VSS — Ground |
| Pin 64 | VDD — Positive supply |
Typical Applications
PIC18LF65K40-E/PT is suitable for 6 applications: Industrial Sensor Node / 4-20 mA Transmitter, Automotive Body Control Module, Low-Power IoT / Battery Sensor Hub, HMI / Keypad / Small Touch Controller, Consumer Appliance Control Board, Portable / Wearable Medical Devices.
Industrial Sensor Node / 4-20 mA Transmitter
The PIC18LF65K40-E/PT's 1.8 V-5.5 V supply range, XLP sleep current under 1 uA, and integrated 10-bit ADC2 with Computation enable direct battery-powered sensor conditioning for industrial 4-20 mA transmitters and process-control nodes. The ECAN module supports DeviceNet and CANopen protocols commonly used in factory automation, while the dual EUSART and SPI/I2C ports interface to digital sensors and HMI displays. At full 64 MHz the 16 MIPS throughput handles filtering, linearization, and HART-style modulation on-chip. PPS remaps peripheral pins without board rework.
Recommended
Automotive Body Control Module
The PIC18LF65K40-E/PT's integrated ECAN and wide 1.8 V-5.5 V supply tolerance with -40 C to +125 C extended temperature grade make it suitable for automotive body and convenience modules (window lifters, mirror controllers, HVAC flap actuators). The PIC18LF65K40 family supports CAN 2.0B active, removing the need for a separate CAN controller IC. The 5-bit DAC drives analog actuator setpoints, while PWM/CWG generates motor control signals. PPS and Core Independent Peripherals offload timing-critical tasks from the CPU, freeing MIPS for diagnostics and OBD-II signaling.
Recommended
Low-Power IoT / Battery Sensor Hub
XLP technology and 1.8 V minimum supply give the PIC18LF65K40-E/PT ultra-low sleep current (under 1 uA typical), enabling years of operation from a single CR2032 coin cell or two AA alkaline cells. The MCU wakes on ADC2 threshold triggers, ZCD events, or interrupt-on-change pins, samples sensors via SPI/I2C, transmits over EUSART or ECAN, and returns to sleep without CPU intervention. Hardware CRC/SCAN protects Flash integrity while in the field. ZCD enables zero-crossing power metering for AC mains-powered IoT energy monitors with no external detection circuitry.
Recommended
HMI / Keypad / Small Touch Controller
With up to 60 GPIO and Peripheral Pin Select, the PIC18LF65K40-E/PT can directly scan 8x8 matrix keypads, drive character or graphic LCDs, and read capacitive-touch sensors via the integrated comparators and PWM/CWG. The 5-bit DAC generates contrast voltages for legacy LCDs without a charge pump. ADC2 with Computation scans multiple touch pads in software while the CWG outputs the excitation waveform, eliminating dedicated touch ICs. PPS remaps touch channels to spare pins for layout flexibility in space-constrained HMI front panels.
Recommended
Consumer Appliance Control Board
White goods and small appliances benefit from the PIC18LF65K40-E/PT's integrated motor-control peripherals (PWM/CCP/CWG), ZCD for AC zero-crossing detection, and 5-bit DAC for analog trim. The 64-pin TQFP exposes enough GPIO to drive triac-based heater control, relays, and user displays while the ECAN interface supports appliance network buses. XLP enables standby power below 100 mW to meet global energy regulations, and the extended -40 C to +125 C temperature grade handles the thermal environment behind a refrigerator compressor or oven fascia.
Recommended
Portable / Wearable Medical Devices
For portable medical peripherals (pulse-oximeter probes, handheld spirometers, blood-pressure monitors) the PIC18LF65K40-E/PT's 1.8 V operation, XLP sleep, and integrated ADC2/DAC/Comparators minimize external components and battery count. The ECAN or EUSART link to a host controller while the SPI/I2C ports read sensor front-ends. Hardware CRC and SCAN protect Flash against soft errors in long-term deployments. The wide 1.8 V-5.5 V supply lets designers reuse a single-cell Li-ion or two AAA cells without a boost converter, shrinking the bill of materials.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF65K40-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF66K40-E/PT | PIC18LF67K40-E/PT | PIC18LF65K40-I/PT | PIC18F65K40-E/PT | PIC18LF65K40-E/MR |
|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (PT), 10x10 mm | 64-pin TQFP (PT), 10x10 mm - same | 64-pin TQFP (PT), 10x10 mm - same | 64-pin TQFP (PT), 10x10 mm - same | 64-pin TQFP (PT), 10x10 mm - same | 64-pin TQFP (PT), 10x10 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 64 KB | 128 KB | 32 KB | 32 KB | 32 KB |
| RAM | 2 KB | 4 KB | 8 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Operating Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 5.5 V |
| Operating Temperature | -40 C to +125 C (E = extended) | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C (industrial) | -40 C to +125 C | -40 C to +125 C |
| Max CPU Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
Key Differentiators
- Lowest-Voltage Operation in the Family (vs PIC18F65K40-E/PT)
- Extended Temperature Grade (-40C to +125C) (vs PIC18LF65K40-I/PT)
- Same 64-pin TQFP Pinout Across the Family (vs PIC18LF66K40-E/PT)
Design Notes
Place 100 nF ceramic decoupling capacitors within 3 mm of every VDD pin and a single 10 uF bulk capacitor on the supply rail. For PIC18LF65K40-E/PT designs that use ADC2, add a separate 100 nF + 10 uF pair on AVDD to keep analog and digital noise isolated. The wide 1.8 V-5.5 V input range means you can power the part directly from a single-cell Li-ion battery (3.0 V-4.2 V) or two AA cells without an LDO, saving BOM cost in low-power designs.
Route the MCLR pin to a dedicated reset button with a 10 kohm pull-up to VDD; adding a 100 nF capacitor from MCLR to VSS provides noise immunity in noisy industrial environments. For in-circuit serial programming (ICSP), dedicate pins RB6 (PGC) and RB7 (PGD) - do not share them with high-impedance analog signals that could disturb programming. The 64-pin TQFP (PT) at 0.5 mm pitch requires fine-pitch PCB layout: use 0.2 mm traces between pads and 0.5 mm via-in-pad for reliable manufacturing.
Do not assume the PIC18F65K40 and PIC18LF65K40 are interchangeable - the F variant requires VIN >= 2.3 V and will brown-out below that, while the LF variant operates to 1.8 V. Estimated: at 3.3 V supply with 64 MHz CPU, core current is around 10 mA but XLP sleep drops to under 1 uA; verify that peripheral pins are configured as digital (ANSELx cleared) before using them as GPIO, otherwise the input buffer is disabled. Use the PPS Unlock sequence before remapping peripheral outputs to avoid an inadvertent lock condition.
Compliance Information
RoHS compliant per Microchip product page. Lead-free matte-tin finish. AEC-Q100 not qualified (this is a general-purpose MCU; automotive customers should evaluate the Automotive Portfolio for Q-graded variants).
