PIC18LF46K22-I/PT - 8-bit 64MHz XLP MCU 64KB Flash 44-TQFP | Microchip
MPN: PIC18LF46K22-I/PT ✓ NakahandaPIC18LF46K22-I/PT Ulas
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, combining a CPU, non-volatile program memory, RAM, peripherals, and interrupt logic in one package. The PIC18 family sits at the top of Microchip's 8-bit portfolio, sitting in the hierarchy: PIC18 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The LF sub-family adds XLP nanoWatt technology that targets sleep currents below 50 nA in deep sleep modes, allowing coin-cell or energy-harvested products to wake only when needed.
Key specifications include 35 digital I/O pins, an internal oscillator up to 64 MHz, configurable peripherals such as multiple UART, SPI, I2C, 10/12-bit ADC, comparators, and PWMs with auto-shutdown. The on-chip 16 MIPS performance lets designers execute DSP-style signal conditioning without external accelerators. The device also integrates an RTCC, mTouch capacitive-touch hardware, and a charge time measurement unit (CTMU) for sensor interfaces.
Typical applications include home automation nodes, handheld instruments, industrial sensor monitoring, low-power IoT edge devices, and consumer electronics that demand rich peripherals in a small 44-pin footprint. The XLP sleep currents and 1.8V minimum VDD make it ideal for battery or energy-harvested designs where quiescent current dominates lifetime.
When designing, always respect the 3.6V absolute maximum VDD for the 'LF' variant and de-couple VDD/AVDD with 100 nF plus bulk capacitance. Use ICSP pins (PGC/PGD) with proper isolation resistors so programming headers do not load the application circuit during debug.
This page consolidates distributor pricing, drop-in TQFP alternatives, and practical design notes to help procurement and embedded engineers evaluate this part for low-power 8-bit designs.
Mga alternatibo na pwedeng ilagay na PIC18LF46K22-I/PT — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok PIC18LF46K22-I/PT (parehas na form factor at footprint) — pagkakaiba sa Operating Temperature, ADC, Timers, Communication, Data EEPROM.
PIC18F46K22-I/PT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18LF46K22-E/PT
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →PIC18LF45K22-I/PT
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
PIC18LF44K22-I/PT
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
PIC18LF4685-I/PT
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →PIC18LF46K22-I/PT Mga Pinakamataas na Rating at Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC, enhanced Harvard) |
| Family | PIC18LF46K22 (nanoWatt XLP) |
| CPU Speed | Up to 64 MHz (16 MIPS) |
| Program Memory | 64 KB Flash (32K x 16) |
| Data EEPROM | 1,024 bytes |
| SRAM | 3,896 bytes |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 35 |
| Packhaging | 44-pin TQFP (10x10 mm), industrial grade |
| Temperature na Operasyon | -40C to +85C (industrial, suffix I) |
| Communication | UART, SPI, I2C |
| Special Features | nanoWatt XLP, mTouch, CTMU, RTCC |
| Tindminan RoHS | Compliant |
| Lead-free | Yes |
| Uri ng Pagpapasok | Surface Mount (TQFP) |
Pin Configuration ng PIC18LF46K22-I/PT
| Pin 1 | RA2 — PORTA digital I/O / analog input |
| Pin 2 | RA3 — PORTA digital I/O / analog input |
| Pin 3 | RA4 — PORTA digital I/O / analog input |
| Pin 4 | RA5 — PORTA digital I/O / analog input |
| Pin 5 | RA6 — PORTA digital I/O / oscillator |
| Pin 6 | RA7 — PORTA digital I/O / oscillator |
| Pin 7 | VDD — Digital supply voltage (1.8V-3.6V) |
| Pin 8 | VSS — Digital ground |
| Pin 9 | RB0 — PORTB digital I/O / interrupt-on-change |
| Pin 10 | RB1 — PORTB digital I/O / interrupt-on-change |
| Pin 11 | RB2 — PORTB digital I/O / interrupt-on-change |
| Pin 12 | RB3 — PORTB digital I/O / interrupt-on-change |
| Pin 13 | RB4 — PORTB digital I/O / interrupt-on-change |
| Pin 14 | RB5 — PORTB digital I/O / interrupt-on-change / ICSP PG |
| Pin 15 | RB6 — PORTB digital I/O / ICSP PGC |
| Pin 16 | RB7 — PORTB digital I/O / ICSP PGD |
| Pin 17 | VDD — Digital supply voltage |
| Pin 18 | VSS — Digital ground |
| Pin 19 | RC0 — PORTC digital I/O |
| Pin 20 | RC1 — PORTC digital I/O / CCP |
| Pin 21 | RC2 — PORTC digital I/O / CCP |
| Pin 22 | RC3 — PORTC digital I/O / SCL |
| Pin 23 | RC4 — PORTC digital I/O / SDA |
| Pin 24 | RC5 — PORTC digital I/O |
| Pin 25 | RC6 — PORTC digital I/O / TX |
| Pin 26 | RC7 — PORTC digital I/O / RX |
| Pin 27 | RE3 — PORTE digital I/O |
| Pin 28 | RD0 — PORTD digital I/O |
| Pin 29 | RD1 — PORTD digital I/O |
| Pin 30 | RD2 — PORTD digital I/O |
| Pin 31 | RD3 — PORTD digital I/O |
| Pin 32 | RD4 — PORTD digital I/O |
| Pin 33 | RD5 — PORTD digital I/O |
| Pin 34 | RD6 — PORTD digital I/O |
| Pin 35 | RD7 — PORTD digital I/O |
| Pin 36 | VSS — Digital ground |
| Pin 37 | VDD — Digital supply voltage |
| Pin 38 | RE0 — PORTE digital I/O / analog input |
| Pin 39 | RE1 — PORTE digital I/O / analog input |
| Pin 40 | RE2 — PORTE digital I/O / analog input |
| Pin 41 | AVDD — Analog supply voltage |
| Pin 42 | AVSS — Analog ground |
| Pin 43 | MCLR — Master Clear reset input (active-low) |
| Pin 44 | RA0 — PORTA digital I/O / analog input |
Tipikal na mga Gamit
PIC18LF46K22-I/PT ay nararapat para sa 7 aplikasyons: Battery-Powered IoT Sensor Nodes, Home Automation Controllers, Handheld Test Instruments, Industrial Sensor Monitoring, Consumer Appliance Controllers, Automotive Body Electronics, Capacitive Touch User Interfaces.
Battery-Powered IoT Sensor Nodes
The PIC18LF46K22-I/PT is engineered for battery-powered wireless sensor nodes where its nanoWatt XLP sleep currents below 50 nA extend coin-cell lifetime from months to years. The 1.8V-3.6V VDD range covers the discharge curve of lithium thionyl chloride primary cells, while the 64 KB Flash holds application code plus small BLE/Zigbee/Sub-GHz protocol stacks. The internal 16 MIPS core executes sensor DSP, ADC averaging, and transmit-side encryption between RF events, and the on-chip RTCC maintains accurate wall-clock timing during deep sleep at currents below 1 uA.
Inirekomenda
Home Automation Controllers
Home automation hubs benefit from the PIC18LF46K22-I/PT's 35 I/O pins, multiple UART/SPI/I2C peripherals, and mTouch capacitive-touch hardware. The 64 KB Flash supports HVAC scheduling logic plus a wireless mesh stack, while the 1,024-byte EEPROM stores user preferences and pairing tables across power cycles. The XLP deep sleep modes let wall-powered devices ride out brown-outs cleanly; the industrial -40C to +85C temperature range ensures reliable operation in attics, basements, and outdoor enclosures.
Inirekomenda
Handheld Test Instruments
The PIC18LF46K22-I/PT powers handheld multimeters and low-cost oscilloscopes where its 1.8V minimum VDD allows two AA cells to operate the unit without boost conversion, eliminating inductor EMI. The on-chip 10/12-bit ADC plus the CTMU enable capacitance, temperature, and low-side current measurements, while the 64 KB Flash stores calibration tables and front-panel firmware. The -40C to +85C range covers field environments, and the 44-TQFP supports compact PCB layouts under 50 mm x 50 mm.
Inirekomenda
Industrial Sensor Monitoring
Industrial 4-20 mA loop-powered transmitters and machine-vibration monitors rely on the PIC18LF46K22-I/PT's 1.8V-3.6V wide-voltage operation, which lets them extract power directly from the loop or from 24V rails with simple LDO dropping. The 64 KB Flash supports MODBUS RTU stacks plus sensor linearization, and 35 I/O pins accept multiplexed thermocouple, RTD, and strain-gauge inputs. The on-chip PWM with auto-shutdown provides hardware-level fault isolation, while XLP sleep modes allow 30-second sampling duty cycles to extend battery or loop-life.
Inirekomenda
Consumer Appliance Controllers
Coffee makers, induction cooktops, and HVAC damper controllers deploy the PIC18LF46K22-I/PT to combine user-interface driving with closed-loop control. The mTouch capacitive-touch peripheral eliminates mechanical buttons for sealed, water-resistant front panels, and the PWM peripheral drives brushed DC motors and TRIAC phases with hardware dead-time insertion. The 64 KB Flash stores menu graphics and audio beep libraries, while the EEPROM holds user presets; XLP deep sleep mode keeps standby power below 100 mW for energy-rating compliance.
Inirekomenda
Automotive Body Electronics
Within body-electronics modules such as seat controllers, mirror adjusters, and HVAC blend-door actuators, the PIC18LF46K22-I/PT delivers 16 MIPS at 3.3 V plus LIN stack support via a UART plus the EUSART. The 64 KB Flash stores LIN node capability files and motor-control algorithms, and the 35 I/O pins drive multiple half-bridges and end-of-travel sensors. Designers seeking AEC-Q100 must use the PIC18F version, but the LF variant is widely deployed in non-safety 12V body ECUs after a 3.3V LDO.
Inirekomenda
Capacitive Touch User Interfaces
The PIC18LF46K22-I/PT integrates mTouch capacitive-touch hardware and CTMU charge-time measurement to build sealed touch panels without mechanical buttons. Designers wire up to 35 sensor electrodes directly to GPIO without external RC components, and the 64 KB Flash stores button-scanning plus gesture libraries. The on-chip 12-bit ADC handles backlight brightness and thermistor readout on the same die, and the XLP sleep current lets touch panels idle at under 1 uA when the appliance is in standby.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for PIC18LF46K22-I/PT — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | PIC18F46K22-I/PT | PIC18LF46K22-E/PT | PIC18LF45K22-I/PT | PIC18LF44K22-I/PT | PIC18LF4685-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same |
| CPU Speed | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 40 MHz (10 MIPS) |
| 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 | 2.0 V to 5.5 V |
| Flash Memory | 64 KB | 64 KB | 64 KB | 32 KB | 16 KB | 96 KB |
| SRAM | 3,896 bytes | 3,896 bytes | 3,896 bytes | 1,536 bytes | 768 bytes | 3,328 bytes |
| Temperature Range | -40C to +85C (I) | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C |
| I/O Pins | 35 | 35 | 35 | 35 | 35 | 36 |
| XLP nanoWatt | Yes | Limited | Yes | Yes | Yes | Yes |
Pangunahing mga Pagkakaiba
- Lowest VDD operating voltage in K22 family (kumpara saPIC18F46K22-I/PT)
- Highest memory tier in LF K22 sub-family (kumpara saPIC18LF45K22-I/PT)
- Full nanoWatt XLP support (kumpara saPIC18F46K22-I/PT)
- 35 I/O for rich peripheral access (kumpara saPIC18LF26K22-I/SO)
Talaan ng Disenyo
Estimated: at VDD=3.3V and CPU active at 16 MIPS, the core draws approximately 8-12 mA; deep-sleep current drops to <50 nA when XLP sleep mode is entered. Always place a 100 nF plus 10 uF ceramic bulk capacitor within 5 mm of VDD and AVSS to meet the in-rush spec. For coin-cell designs, software should disable the BOR and use the internal LFINTOSC to minimize sleep currents below 100 nA.
Route ICSP pins (PGC/RB6, PGD/RB7) with isolation resistors or a removable header so the programmer does not disturb application circuitry during debug. Keep the 16 MHz crystal traces short and symmetric, and guard them with a ground pour to reduce EMI. For mTouch electrode routing, do not route digital signals parallel to the touch trace and add a ground ring around each pad for noise immunity.
Do not exceed 3.6V on VDD - the LF variant has a lower absolute maximum than the F variant. The MCLR pin requires a 10 kohm pull-up; do not leave it floating or the device may intermittently reset. When migrating from PIC18F46K22-I/PT, ensure your firmware does not rely on the higher F-variant VDD range, since the LF part will brown out below 1.8V. The /PT suffix designates 44-TQFP tray packaging; verify your pick-and-place accepts trays or specify tape-and-reel separately.
Place a 100 ohm series resistor on MCLR if the wire leaves the PCB, to limit ESD-induced ringing. For ADC accuracy, route analog inputs (RA0-RA7, RE0-RE2) away from switching signals and use the AVSS/AVDD pair with its own decoupling. The CTMU timing is sensitive to VDD variation; add a software calibration routine using the internal bandgap reference.
Impormasyon ng Pagsunod sa Kautusan
RoHS and REACH compliant per Microchip product page. Industrial -40C to +85C temperature grade (suffix I). Not AEC-Q100 qualified - select the PIC18F46K22-I/PT variant for automotive applications.
