PIC18LF45K22-E/P - 32KB Flash XLP 8-bit MCU, 40-PDIP | Microchip
N.º da peça: PIC18LF45K22-E/P ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.4 | $4,40 |
| 10 | $3.85 | $38,50 |
| 100 | $3.32 | $332,00 |
| 500 | $2.95 | $1.475,00 |
| 1.000 | $2.62 | $2.620,00 |
PIC18LF45K22-E/P Visão geral
What is a microcontroller? A microcontroller (MCU) is a single-chip computer that combines a CPU core, non-volatile program memory (Flash), working memory (RAM), data EEPROM, and a rich set of on-chip peripherals (ADC, timers, communication ports, comparators, PWM). PIC18 microcontrollers belong to the 8-bit Harvard-architecture family and sit inside the broader category of embedded microcontrollers -> microcontrollers -> integrated circuits -> semiconductors, and the nanoWatt XLP line represents Microchip's ultra-low-power extension of that family.
Key features of the PIC18LF45K22-E/P include nanoWatt XLP technology for sub-µA sleep currents, two Enhanced USART modules, two MSSP (SPI/I2C) modules, a 10-bit ADC with up to 28 input channels, and up to 36 digital I/O pins. Internal oscillator options (up to 16 MHz) and on-chip voltage reference simplify BOM, while the integrated CTMU (Charge Time Measurement Unit) enables touch and capacitive sensing.
The architecture separates program and data buses (Harvard), features a 16-bit instruction word, and supports hardware multiply and 31-level priority interrupts. With XLP deep-sleep currents as low as 20 nA (typical, per datasheet), the device is engineered for long-battery-life designs and includes nanoWatt XLP sleep and idle modes.
Typical applications include low-power sensor nodes, portable instrumentation, battery-powered medical devices, industrial control panels, USB-CDC peripherals, and educational/development platforms. The 40-pin PDIP package is also preferred for prototyping and hobby applications through-hole assembly is convenient.
A critical design tip: the 'E' suffix denotes the Extended temperature range (-40C to +125C); use the '-I/' variant only for commercial 0C to +85C designs. The PIC18LF45K22-E/P (PDIP) is recommended for new designs and replaces the older PIC18F452 in most 40-pin DIP footprints, although peripheral mapping must be verified.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas drop-in para PIC18LF45K22-E/P — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18LF45K22-E/P (mesmo formato e footprint) — diferindo em Package, Program Memory (Flash), MSL Level, Operating Temperature, Timers.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18LF46K22-E/P
✅ Drop-In✓ Em estoque
$3.5 / unidade
Ver ficha técnica →PIC18LF44K22-I/P
✅ Drop-In✓ Em estoque
$2.78 / unidade
Ver ficha técnica →PIC18LF45K22-E/MV
✅ Drop-In✓ Em estoque
$2.55 / unidade
Ver ficha técnica →PIC18LF45K42-E/P
✅ Drop-In✓ Em estoque
$1.99 / unidade
Ver ficha técnica →PIC18F45K22-E/P
✅ Drop-In✓ Em estoque
$2.78 / unidade
Ver ficha técnica →PIC18LF46K22-I/P
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF45K22-E/P Classificações máximas e características elétricas
| Product Type | 8-bit Microcontroller (MCU) |
| Series | PIC18LF "K22" XLP |
| Core | PIC18 (Harvard, 8-bit data / 16-bit instruction) |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| RAM | 2 KB |
| EEPROM | 256 bytes |
| Max CPU Frequency | 48 MHz |
| Supply Voltage (Vdd) | 1.8 V to 3.6 V |
| I/O Pins | 36 |
| ADC | 10-bit, up to 28 channels |
| Communication | 2x EUSART, 2x MSSP (SPI/I2C) |
| Timers | Up to 7 (16-bit / 8-bit mix) |
| Encapsulamento | 40-pin PDIP (0.600", 15.24 mm) |
| Tipo de montagem | Through-Hole (DIP) |
| Temperatura de operação | -40C to +125C (Extended, "-E" suffix) |
| Status RoHS | Compliant (lead-free) |
Configuração de pinos do PIC18LF45K22-E/P
| Pino 1 | MCLR/RE3 — Reset input / digital input only on port E bit 3 |
| Pino 2 | RA0/AN0/C1INA/ULPWU — PORTA bit 0 / analog input 0 / comparator 1 input / ultra-low-power wake-up |
| Pino 3 | RA1/AN1/C2INA/CTDIN — PORTA bit 1 / analog input 1 / comparator 2 input / CTMU digital input |
| Pino 4 | RA2/AN2/Vref-/CVref — PORTA bit 2 / analog input 2 / ADC voltage reference low / comparator voltage reference |
| Pino 5 | RA3/AN3/Vref+ — PORTA bit 3 / analog input 3 / ADC voltage reference high |
| Pino 6 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input / comparator 1 output |
| Pino 7 | RA5/AN4/C2OUT/SRNQ — PORTA bit 5 / analog input 4 / comparator 2 output / SR latch NOT-Q |
| Pino 8 | RE0/RD/AN5 — PORTE bit 0 / LCD segment drive / analog input 5 |
| Pino 9 | RE1/WR/AN6 — PORTE bit 1 / LCD segment drive / analog input 6 |
| Pino 10 | RE2/CS/AN7 — PORTE bit 2 / LCD segment drive / analog input 7 |
| Pino 11 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pino 12 | VSS — Ground reference |
| Pino 13 | OSC1/CLKIN/RA7 — Crystal oscillator input / external clock in / PORTA bit 7 |
| Pino 14 | OSC2/CLKOUT/RA6 — Crystal oscillator output / system clock output / PORTA bit 6 |
| Pino 15 | RC0/SOSCO — PORTC bit 0 / secondary oscillator output (32.768 kHz) |
| Pino 16 | RC1/SOSCI — PORTC bit 1 / secondary oscillator input (32.768 kHz) |
| Pino 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pino 18 | RC3/SCL1/SCK1 — PORTC bit 3 / MSSP1 I2C clock / MSSP1 SPI clock |
| Pino 19 | RD0/PSP0/AN8/SEG0 — PORTD bit 0 / parallel slave port data / analog input 8 / LCD segment 0 |
| Pino 20 | RD1/PSP1/AN9/SEG1 — PORTD bit 1 / parallel slave port data / analog input 9 / LCD segment 1 |
| Pino 21 | RD2/PSP2/AN10/SEG2 — PORTD bit 2 / parallel slave port data / analog input 10 / LCD segment 2 |
| Pino 22 | RD3/PSP3/AN11/SEG3 — PORTD bit 3 / parallel slave port data / analog input 11 / LCD segment 3 |
| Pino 23 | RC4/SDI1/SDA1 — PORTC bit 4 / MSSP1 SPI data in / MSSP1 I2C data |
| Pino 24 | RC5/SDO1 — PORTC bit 5 / MSSP1 SPI data out |
| Pino 25 | RC6/TX1/CK1 — PORTC bit 6 / EUSART1 transmit / EUSART1 clock |
| Pino 26 | RC7/RX1/DT1 — PORTC bit 7 / EUSART1 receive / EUSART1 data |
| Pino 27 | RD4/PSP4/AN12/SEG4 — PORTD bit 4 / parallel slave port data / analog input 12 / LCD segment 4 |
| Pino 28 | RD5/PSP5/AN13/SEG5 — PORTD bit 5 / parallel slave port data / analog input 13 / LCD segment 5 |
| Pino 29 | RD6/PSP6/AN14/SEG6 — PORTD bit 6 / parallel slave port data / analog input 14 / LCD segment 6 |
| Pino 30 | RD7/PSP7/AN15/SEG7 — PORTD bit 7 / parallel slave port data / analog input 15 / LCD segment 7 |
| Pino 31 | VSS — Ground reference |
| Pino 32 | VDD — Positive supply (1.8 V to 3.6 V) |
| Pino 33 | RB0/AN12/INT0/FLT0/SEG8 — PORTB bit 0 / analog input 12 / external interrupt 0 / PWM fault 0 / LCD segment 8 |
| Pino 34 | RB1/AN10/INT1/SEG9 — PORTB bit 1 / analog input 10 / external interrupt 1 / LCD segment 9 |
| Pino 35 | RB2/AN8/INT2/SEG10 — PORTB bit 2 / analog input 8 / external interrupt 2 / LCD segment 10 |
| Pino 36 | RB3/AN9/CCP2/SEG11 — PORTB bit 3 / analog input 9 / Capture/Compare/PWM 2 / LCD segment 11 |
| Pino 37 | RB4/KBI0/AN11/SEG12 — PORTB bit 4 / interrupt-on-change / analog input 11 / LCD segment 12 |
| Pino 38 | RB5/KBI1/AN13/SEG13 — PORTB bit 5 / interrupt-on-change / analog input 13 / LCD segment 13 |
| Pino 39 | RB6/KBI2/PGC/ICSPCLK — PORTB bit 6 / interrupt-on-change / ICSP clock (programming/debug) |
| Pino 40 | RB7/KBI3/PGD/ICSPDAT — PORTB bit 7 / interrupt-on-change / ICSP data (programming/debug) |
Aplicações típicas
PIC18LF45K22-E/P é adequado para 7 aplicaçãos: Battery-Powered Wireless Sensor Node, Handheld Medical Measurement Device, Industrial Control Panel HMI, Portable Data Logger / Instrumentation, USB-CDC Peripheral Bridge Device, Educational Microcontroller Teaching Platform, Capacitive-Touch User Interface.
Battery-Powered Wireless Sensor Node
The PIC18LF45K22-E/P's nanoWatt XLP technology enables sub-uA sleep currents around 20 nA typical with Watchdog Timer enabled, allowing multi-year operation on a 2x AA or Li-primary cell. The LF 1.8-3.6 V supply range matches directly with battery voltage, avoiding the need for a boost converter, and the integrated 10-bit ADC with up to 28 channels lets the node digitize multiple sensor inputs without external analog components. Combined with the EUSART and MSSP modules for connecting to a low-power radio transceiver, the K22 is a natural fit for duty-cycled IoT sensor endpoints that wake briefly, sample, transmit, and return to deep sleep.
Recomendado
Handheld Medical Measurement Device
The Extended -40C to +125C temperature range of the PIC18LF45K22-E/P supports handheld medical devices that may sit in unheated rooms, ambulances, or refrigerator storage. The 32 KB Flash accommodates complex measurement algorithms, while the 2 KB RAM provides working memory for waveform buffering. Low active current at 48 MHz (about 6 mA) keeps thermal rise minimal for skin-contact thermometry, and the CTMU peripheral enables capacitive touch buttons without external components, simplifying the user interface.
Recomendado
Industrial Control Panel HMI
The 36 digital I/O pins of the PIC18LF45K22-E/P can drive keypads, character LCDs, status LEDs, and relay outputs directly without external bus expanders, while the 40-pin PDIP package remains ideal for hand-soldered industrial prototypes and field-serviceable designs. The PIC18 instruction set with hardware multiply accelerates deterministic control loops, and the dual EUSART simplifies RS-232 / RS-485 bridging in industrial protocols. Pan and port-mapped peripherals keep interrupt latency tight for safety-critical control loops.
Recomendado
Portable Data Logger / Instrumentation
The 32 KB Flash and 256 bytes of EEPROM of the PIC18LF45K22-E/P enable local storage of calibration constants, user preferences, and small data buffers, while the integrated 10-bit ADC handles multi-channel temperature, voltage, or current monitoring. The LF 1.8-3.6 V supply matches portable battery packs and USB-powered instrumentation, and the nanoWatt XLP deep sleep preserves battery life during standby between logging intervals. The PIC18 core executes deterministic DSP loops for FFT or FIR filtering without external signal-processing ICs.
Recomendado
USB-CDC Peripheral Bridge Device
The PIC18LF45K22-E/P's MSSP (SPI/I2C) modules and EUSART allow it to bridge legacy UART peripherals to USB via an external MCP2200 or MCP2221, while the 32 KB Flash can host custom CDC command interpreters. The LF 1.8-3.6 V supply works directly from a USB-powered 3.3 V regulator rail, eliminating the need for a separate power stage. The wide Extended temperature range supports commercial and industrial USB peripherals deployed in harsh environments.
Recomendado
Educational Microcontroller Teaching Platform
The 40-pin PDIP package of the PIC18LF45K22-E/P is breadboard-friendly and survives repeated insertion cycles, making it ideal for university laboratories, maker spaces, and hobby platforms. MPLAB X IDE and XC8 compiler support is free, and the PICkit 4 / MPLAB Snap programmers provide in-circuit debugging at low cost. Students can experiment with the on-chip ADC, timers, interrupts, and UART without soldering or surface-mount rework, accelerating curriculum delivery.
Recomendado
Capacitive-Touch User Interface
The on-chip CTMU (Charge Time Measurement Unit) of the PIC18LF45K22-E/P enables capacitive-touch buttons, sliders, and proximity sensors without external touch ICs. Combined with the integrated 10-bit ADC for analog measurements and the 32 KB Flash for gesture-recognition firmware, the K22 can replace multiple discrete components in a touch user interface. The LF 1.8-3.6 V supply range matches battery-operated touch interfaces in consumer products.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF45K22-E/P — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18LF46K22-E/P | PIC18LF44K22-I/P | PIC18LF45K42-E/P | PIC18F45K22-E/P | PIC18LF46K22-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-40 (0.600 inch / 15.24 mm) | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same |
| Program Memory (Flash) | 32 KB (16K x 16) | 64 KB (+100%) | 16 KB (-50%) | 32 KB (same) | 32 KB (same) | 64 KB (+100%) |
| RAM | 2 KB | 2 KB (same) | 1 KB (-50%) | 2 KB (same) | 2 KB (same) | 2 KB (same) |
| Supply Voltage (Vdd) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 5.5 V (F) | 1.8 V to 3.6 V (LF) |
| Maximum CPU Frequency | 48 MHz (12 MIPS) | 48 MHz (same) | 48 MHz (same) | 64 MHz (faster) | 48 MHz (same) | 48 MHz (same) |
| I/O Pins | 36 | 36 (same) | 36 (same) | 36 (same) | 36 (same) | 36 (same) |
| Operating Temperature | -40C to +125C (Extended, '-E') | -40C to +125C (Extended) | 0C to +85C (Industrial, '-I') | -40C to +125C (Extended) | -40C to +125C (Extended) | 0C to +85C (Industrial) |
| Core Family | PIC18 XLP K22 | PIC18 XLP K22 | PIC18 XLP K22 | PIC18 XLP K42 (newer) | PIC18 XLP K22 (F variant) | PIC18 XLP K22 |
Principais diferenciais
- Higher memory density in the same package versus smaller K22 siblings (vs PIC18LF44K22-I/P)
- Lower supply range with identical silicon versus the F variant (vs PIC18F45K22-E/P)
- Extended -40C to +125C temperature range versus Industrial variants (vs PIC18LF44K22-I/P / PIC18LF46K22-I/P)
- Established nanoWatt XLP technology versus newer K42 core (vs PIC18LF45K42-E/P)
Notas de projeto
Use the nanoWatt XLP Sleep mode (SLEEP instruction with IDLEN=0 and Watchdog Timer configured) to achieve typical deep-sleep currents around 20 nA per Microchip datasheet DS39996. For duty-cycled sensor nodes, exit sleep via WDT timeout (1 second typical at 32 kHz secondary oscillator) or via an external interrupt on RB0-RB7. Estimated battery life: a CR2032 (~220 mAh) powering a sensor node with 99.5 percent sleep duty cycle lasts approximately 4 years before reaching 2.0 V cutoff.
Place the 1 uF bypass capacitor within 5 mm of the VDD pins (11 and 32 on the 40-pin PDIP), and a second 100 nF ceramic close to the MCU. Route the ICSP signals RB6/PGC and RB7/PGD as a short, parallel pair away from switching traces to avoid noise injection during in-circuit programming. Add a 10 kohm pull-up on MCLR (pin 1) to VDD for reliable reset behaviour; the MCLR pin is rated to 13.5 V maximum.
Do not apply voltages above 3.6 V to any I/O pin on the PIC18LF45K22-E/P (LF variant); over-voltage will trigger ESD latch-up. If a 5 V rail is present in your system, select the PIC18F45K22-E/P (F variant, 1.8-5.5 V tolerant) instead. Also verify that the LF device is configured for HFINTOSC with the PLL disabled if you are operating at 3.3 V, since some PLL configurations require minimum 3.0 V to lock reliably.
When using the ADC, isolate the analog traces (RA0-RA5, RE0-RE2, RB0-RB2) from switching nodes such as PWM outputs or the EUSART TX line. The datasheet recommends a ground plane beneath the analog area and ferrite-bead decoupling between AVDD and VDD if you supply the ADC reference from a separate rail. Use the dedicated Vref+ (RA3) and Vref- (RA2) pins instead of tying the reference to VDD for better-than-Vdd/2 noise rejection.
For crystal-oscillator operation above 4 MHz, follow Microchip's oscillator layout guidelines: keep the crystal traces short, place the load capacitors within 5 mm of OSC1 and OSC2, and surround the oscillator area with a ground pour to minimise radiated EMI. For low-power designs, prefer the internal HFINTOSC up to 16 MHz and avoid a crystal entirely; this eliminates the 1-5 mA idle current required to drive an external crystal oscillator.
Informações de conformidade
RoHS-compliant lead-free PDIP package per Microchip product page. AEC-Q100 qualification status not asserted by manufacturer for this part; for automotive-grade PIC18 parts, see the PIC18FxxKxx-Q1 family instead.
