PIC18LF67K40T-I/PT - 64-pin, 128KB Flash XLP 8-bit MCU | Microchip
MPN: PIC18LF67K40T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.1 | $5.10 |
| 10 | $4.65 | $46.50 |
| 100 | $4.05 | $405.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.1 | $3,100.00 |
PIC18LF67K40T-I/PT Overview
Key features include a 10-bit ADC with Computation (ADCC) supporting hardware Capacitive Voltage Divider (CVD) for advanced touch sensing, a 5-bit DAC, two comparators, a zero-cross detect (ZCD) module, a Complementary Waveform Generator (CWG), multiple PWM/CCP/SCCP timers, a windowed watchdog (WWDT), CRC/Memory Scan, Peripheral Pin Select (PPS), EUSART, SPI and I2C. The XLP variants (LF) target sleep currents in the nanoampere range and active modes under 1 mA/MIPS.
Architecturally, the PIC18LF67K40T-I/PT belongs to the PIC18 family of 8-bit microcontrollers - a Harvard-architecture RISC MCU class positioned under 16-bit PIC24/dsPIC and 32-bit PIC32MX/SAM in Microchip's MCU portfolio. The 'LF' suffix denotes the low-voltage/low-power XLP silicon; the 'T' indicates tape and reel packaging, and the 'I' is the industrial -40C to +85C temperature grade. Integration of CIPs (CWG, ZCD, WWDT, PPS, CRC) lets the core offload timing-critical analog and digital tasks, reducing CPU load and firmware complexity.
Typical applications include capacitive touch user interfaces, low-power IoT sensor nodes, battery-powered industrial sensors, HVAC and home appliances, and general-purpose embedded control. The combination of 128 KB Flash and rich peripherals makes it suitable for feature-rich consumer devices with display, communication and motor-control requirements.
When designing with this device, plan oscillator and PPS configuration early because peripheral-to-pin mapping is flexible but must be locked at runtime. For capacitive touch, follow Microchip's CVD layout and grounding guidelines; the ADCC handles the touch decoding but PCB hygiene is critical.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC18LF67K40T-I/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 PIC18LF67K40T-I/PT (same form factor and footprint) — differing in ADC, Core, Data SRAM, Package, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF67K40-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F67K40T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF66K40T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF67K40-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF57K42T-I/PT
✅ Drop-In✓ In Stock
$2.78 / Unit
View Datasheet →PIC18LF67K40T-I/PT Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit RISC |
| Maximum CPU Frequency | 64 MHz |
| Performance | 16 MIPS |
| Program Memory (Flash) | 128 KB |
| Data SRAM | 4 KB |
| Data EEPROM | 1 KB |
| Operating Voltage Range | 1.8 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (Industrial, 'I') |
| ADC | 10-bit ADCC, up to 47 channels |
| DAC | 5-bit DAC, 1 channel |
| Comparators | 2 |
| PWM Channels | Multiple (CCP/SCCP/PWM) |
| Package | 64-pin TQFP (PT), 10x10 mm |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Low-Power Technology | eXtreme Low Power (XLP) |
PIC18LF67K40T-I/PT 64-pin tqfp (pt), 10x10 mm Pin Configuration Guide
Pin configuration for PIC18LF67K40T-I/PT (64-pin tqfp (pt), 10x10 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC18LF67K40T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC18LF67K40T-I/PT is suitable for 6 applications: Capacitive Touch User Interface, Battery-Powered IoT Sensor Node, Industrial Sensor and Actuator Control, Home Appliance Control (HVAC, White Goods), Automotive Body and Interior Modules, Display and User Interface Controller.
Capacitive Touch User Interface
The PIC18LF67K40T-I/PT's 10-bit ADCC with hardware Capacitive Voltage Divider (CVD) automates touch scanning for buttons, sliders and proximity sensors. The XLP nanoWatt sleep current lets the MCU idle below 1 uA between scans, enabling 2-3 year battery life on coin cells for remote controls and IoT panels. The 47 ADC channels and PPS flexibility route touch electrodes to any available I/O, freeing board layout. Companion parts: PIC18LF47K40T-I/PT (44-pin lower-cost variant) and MCP73831 Li-ion charger IC.
Recommended
Battery-Powered IoT Sensor Node
The LF-suffix XLP core delivers active currents under 1 mA/MIPS and sleep currents in the nanoampere range per the Microchip PIC18(L)F67K40 datasheet 40001841D. With 128 KB Flash for ZigBee/LoRa/BLE stack fragments and a wide 1.8-3.6 V range, the PIC18LF67K40T-I/PT powers multi-year sensor nodes on 2xAA cells. The hardware CRC, WWDT and Memory Scan offload reliability tasks from the CPU. Recommended companions: MCP9808 temperature sensor and ATA8520E sub-GHz transceiver.
Recommended
Industrial Sensor and Actuator Control
The 5V tolerance of the PIC18LF67K40T-I/PT (LF) at the upper end of its 1.8-3.6 V range, combined with the 5-bit DAC and dual comparators, supports 3.3 V industrial control loops with analog conditioning. The 64-pin TQFP exposes enough I/O to drive multiple relays, MOSFET bridges or stepper coils via PWM and the Complementary Waveform Generator (CWG). The industrial -40C to +85C temperature grade matches factory floor requirements per the Microchip datasheet 40001841D. Companion parts: MCP2562 CAN transceiver and MCP1700 LDO regulator.
Recommended
Home Appliance Control (HVAC, White Goods)
The PIC18LF67K40T-I/PT's CWG and PWM peripherals generate complementary MOSFET drive for compressor, fan and triac-based heating control in HVAC and white goods. Zero-Cross Detect (ZCD) hardware synchronizes triac firing to AC line zero crossings, reducing EMI and relay stress. The 128 KB Flash accommodates complex user-interface state machines and safety diagnostic code. Recommended companions: MCP8024 3-phase BLDC gate driver and MCP9808 temperature sensor.
Recommended
Automotive Body and Interior Modules
The PIC18LF67K40T-I/PT industrial -40C to +85C temperature grade and Core Independent Peripherals (CWG, ZCD, WWDT) map well to automotive body modules such as interior lighting, seat controllers and HVAC panels - though automotive safety-critical modules require the AEC-Q100 qualified PIC18F67K40T-I/PT (Q1 suffix). The E-suffix variant PIC18LF67K40-E/PT extends the operating temperature to +125C for under-hood auxiliary loads. Recommended companions: MCP2515 CAN controller and MCP1700 3.3V LDO.
Recommended
Display and User Interface Controller
The PIC18LF67K40T-I/PT drives character LCDs, OLED panels and segmented displays via SPI/I2C master channels, with Peripheral Pin Select (PPS) routing the interface to any available I/O. The 128 KB Flash and 4 KB SRAM support graphical menu rendering with caching, while the CWG can also drive LED backlight boost converters via PWM. Recommended companions: MCP23S17 I/O expander and MCP1700 LDO regulator.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF67K40T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF67K40-I/PT | PIC18F67K40T-I/PT | PIC18LF66K40T-I/PT | PIC18LF67K40-E/PT | PIC18LF57K42T-I/PT |
|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 K42 8-bit, 64 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 64 KB | 128 KB | 128 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 8 KB |
| Operating Voltage Range | 1.8 V to 3.6 V (LF XLP) | 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 |
| Operating Temperature | -40 C to +85 C (I) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (E) | -40 C to +85 C |
| ADC | 10-bit ADCC, up to 47 channels | 10-bit ADCC, 47 ch | 10-bit ADCC, 47 ch | 10-bit ADCC, 47 ch | 10-bit ADCC, 47 ch | 12-bit ADCC, 47 ch |
| Unit Price (qty 1, USD) | 5.10 | 5.10 | 5.10 | 4.50 | 5.40 | 4.20 |
Key Differentiators
- Lowest-voltage XLP operation in the 67K40 family (vs PIC18F67K40T-I/PT)
- Full 128 KB Flash at -40C to +85C industrial grade (vs PIC18LF66K40T-I/PT)
- Extended Core Independent Peripheral (CIP) integration (vs PIC18LF47K40T-I/PT)
Design Notes
The PIC18LF67K40T-I/PT (LF) operates from 1.8 V to 3.6 V; if your design's rail can exceed 3.6 V (e.g., 5 V USB or 12 V bus) you must regulate it down to <=3.6 V before reaching the MCU VDD pin. Use an MCP1700-3302 LDO for low-Iq regulation (<=1.6 uA quiescent), preserving the XLP sleep-current budget. Decouple VDD with a 100 nF ceramic placed within 5 mm of the pin, plus a bulk 4.7 uF for transient handling.
At 64 MHz the PIC18LF67K40T-I/PT draws roughly 8-10 mA active per core, but the package dissipation is rarely the limiting factor - it is the VDD rail current budget for battery applications. Estimated: a 2xAA design with 2000 mAh capacity and average 500 uA draw (1% duty cycle active, 99% XLP sleep at 100 nA) yields ~3 years of battery life. Add a series PTC resettable fuse on the battery line to prevent reverse-polarity damage.
For capacitive touch via CVD, keep touch electrodes routed on a dedicated PCB layer with a solid ground plane one layer below - do not run noisy switching traces (PWM, comms) directly under touch pads. Per Microchip AN1478 and the PIC18(L)F67K40 datasheet 40001841D, the ADCC hardware handles charge sequencing but PCB hygiene drives touch sensitivity and noise immunity. Add a 1-2 mm guard ring around each touch pad tied to a quiet ground or driven shield.
Do not skip the configuration bits (fuses) programming step - the PIC18LF67K40T-I/PT defaults to a configuration that may disable the PLL or select an internal oscillator that does not match your timing requirements. Always set the WDTCPS, LVP and DEBUG bits explicitly via #pragma config before generating production firmware. Also: PPS registers are unlocked only after writing a specific sequence to IOLOCK; forgetting this locks the MCU into its reset pin map at runtime.
The EUSART, SPI and I2C peripherals can be remapped via PPS to any digital I/O, but route high-speed signals (>=10 MHz SPI) on shorter traces (<50 mm) and add a series 33 ohm resistor near the driver for source termination. Place the crystal or external oscillator within 5 mm of OSC1/OSC2 pins with a ground guard ring, especially in EMI-heavy industrial environments.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - for automotive safety-critical applications use the PIC18F67K40-E/PT (extended temperature) or PIC18F67K40T-I/PT (F-suffix) instead. Halogen-free status not explicitly stated in the provided data.
