PIC18LF46K22-E/PT - 64KB Flash 8-bit MCU 48MHz | Microchip
N.º de pieza: PIC18LF46K22-E/PT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.91 | $4,91 |
| 10 | $4.42 | $44,20 |
| 100 | $3.93 | $393,00 |
| 500 | $3.54 | $1.770,00 |
| 1.000 | $3.15 | $3.150,00 |
PIC18LF46K22-E/PT Descripción general
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash, SRAM, EEPROM), and peripherals (ADC, timers, communication interfaces) on one die. The PIC18LF46K22 belongs to the 8-bit PIC18 architecture hierarchy: PIC18 family -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. Its nanoWatt XLP technology adds sleep currents in the nanoamp range, making it well suited for always-on, energy-harvesting, or battery-powered designs where quiescent draw dominates lifetime.
Key features include two I2C, two SPI, two USART (including LIN-capable) interfaces, a 12-channel 10-bit ADC, multiple 8/16-bit timers with PWM, and a charge time measurement unit (CTMU) for capacitive touch. The 64KB Flash supports self-programmability under software control, enabling in-field firmware updates without an external programmer. The 44-pin TQFP footprint gives access to up to 36 I/O pins and supports JTAG/ICSP in-circuit debugging through dedicated pins.
Typical applications include low-power sensor nodes, pulse oximeter front ends, portable medical instruments, industrial HMI panels, USB-to-UART bridges, and battery-backed IoT devices that demand long sleep intervals. The CTMU peripheral also enables capacitive touch keypads and slider interfaces without an external touch controller.
When designing with this part, populate the VDD/VSS pins with 100 nF + 10 uF decoupling placed within a few millimeters of the package, and use the on-chip LDO (if enabled in configuration bits) for cleaner ADC measurements. For sleep-mode designs, verify the MCLR pull-up and WDT configuration to avoid unwanted resets and current draw.
This page synthesizes distributor pricing, parametric proximity-ranked drop-in alternatives, and practical design notes beyond what the manufacturer datasheet provides, structured for fast lookup during component selection and PCB bring-up.
Alternativas directas para PIC18LF46K22-E/PT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC18LF46K22-E/PT (mismo factor de forma y huella) — difiere en Package, I/O Pins, ADC, Program Memory (Flash), Core Architecture.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18F46K22-E/PT
✅ Sustitución directa✓ En stock
$2.6 / unidad
Ver hoja de datos →PIC18LF45K22-E/PT
✅ Sustitución directa✓ En stock
$2.38 / unidad
Ver hoja de datos →PIC18LF46K22-I/PT
✅ Sustitución directa✓ En stock
$1.35 / unidad
Ver hoja de datos →PIC18LF44K22-E/PT
✅ Sustitución directa✓ En stock
$1.7 / unidad
Ver hoja de datos →PIC18LF43K22-E/P
✅ Sustitución directa✓ En stock
$1.74 / unidad
Ver hoja de datos →PIC18LF46K22-E/PT Valores máximos y características eléctricas
| Core | PIC18 8-bit RISC |
| Program Memory (Flash) | 64 KB (32K x 16 words) |
| Data SRAM | 3,896 bytes |
| Data EEPROM | 1 KB (1,024 bytes) |
| Maximum CPU Frequency | 48 MHz |
| Operating Voltage Range | 1.8 V to 3.3 V |
| I/O Pins | 36 |
| ADC | 12-channel, 10-bit |
| Timers | 8-bit and 16-bit with PWM |
| Communication Interfaces | 2x I2C, 2x SPI, 2x USART (LIN-capable) |
| Special Peripherals | CTMU (capacitive touch), PMP, EUSART |
| Encapsulado | 44-pin TQFP (PT), 10x10 mm |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40C to +125C (Extended, -E suffix) |
| Low-Power Technology | nanoWatt XLP |
| In-Circuit Debug | ICSP / JTAG |
| Estado RoHS | Compliant |
Configuración de pines de PIC18LF46K22-E/PT
| Pin 1 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Pin 2 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / Voltage reference plus |
| Pin 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 4 | RA5/AN4/SS1/HLVDIN — Port A bit 5 / Analog input 4 / SPI1 slave select / HLVD input |
| Pin 5 | RA6 — Port A bit 6 (general I/O) |
| Pin 6 | RA7 — Port A bit 7 (general I/O) |
| Pin 7 | VSS — Ground reference |
| Pin 8 | VDD — Positive supply (1.8V-3.3V) |
| Pin 9 | OSC1/CLKI/RA7 — Oscillator crystal input / external clock input |
| Pin 10 | OSC2/CLKO/RA6 — Oscillator crystal output / clock output |
| Pin 11 | RC0/SOSCO — Port C bit 0 / Secondary oscillator output |
| Pin 12 | RC1/SOSCI — Port C bit 1 / Secondary oscillator input |
| Pin 13 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| Pin 14 | RC3/SCL1 — Port C bit 3 / I2C1 clock |
| Pin 15 | RC4/SDA1 — Port C bit 4 / I2C1 data |
| Pin 16 | RC5/SDO1 — Port C bit 5 / SPI1 data out |
| Pin 17 | RC6/TX1/CK1 — Port C bit 6 / USART1 transmit / clock |
| Pin 18 | RC7/RX1/DT1 — Port C bit 7 / USART1 receive / data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply |
| Pin 21 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 |
| Pin 22 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Pin 23 | RB2/INT2/CTED1 — Port B bit 2 / External interrupt 2 / CTMU edge 1 |
| Pin 24 | RB3/INT3/CTED2 — Port B bit 3 / External interrupt 3 / CTMU edge 2 |
| Pin 25 | RB4 — Port B bit 4 (general I/O) |
| Pin 26 | RB5 — Port B bit 5 (general I/O) |
| Pin 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — Port B bit 7 / ICSP data |
| Pin 29 | MCLR/VPP/RE3 — Master clear / Programming voltage / Port E bit 3 |
| Pin 30 | RA0/AN0/ULPWU — Port A bit 0 / Analog input 0 / Ultra-low-power wake-up |
| Pin 31 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 32 | VSS — Ground reference |
| Pin 33 | RD0 — Port D bit 0 |
| Pin 34 | RD1 — Port D bit 1 |
| Pin 35 | RD2 — Port D bit 2 |
| Pin 36 | RD3 — Port D bit 3 |
| Pin 37 | RD4 — Port D bit 4 |
| Pin 38 | RD5 — Port D bit 5 |
| Pin 39 | RD6 — Port D bit 6 |
| Pin 40 | RD7 — Port D bit 7 |
| Pin 41 | VSS — Ground reference |
| Pin 42 | VDD — Positive supply |
| Pin 43 | RE0 — Port E bit 0 |
| Pin 44 | RE1 — Port E bit 1 |
Aplicaciones típicas
PIC18LF46K22-E/PT es adecuado para 6 aplicacións: Battery-Powered IoT Sensor Node, Pulse Oximeter Front End, Industrial HMI Keypad & Display, USB-to-UART Bridge / Serial Console, Automotive LIN Slave Node, Capacitive Touch User Interface.
Battery-Powered IoT Sensor Node
The PIC18LF46K22-E/PT is engineered for always-on IoT sensor nodes that sleep 99% of the time. Its nanoWatt XLP technology delivers sub-1 uA sleep current with RTC and brown-out-reset active, while the 1.8V to 3.3V supply matches a single-cell Li-ion or 2xAA battery directly. The 12-channel 10-bit ADC samples multiple analog sensors, the two I2C buses connect to digital sensors, and the USART handles UART-modem or BLE modules. With 64KB Flash, designers can implement a complete LoRaWAN or Zigbee stack plus a bootloader, all on one IC.
Recomendado
Pulse Oximeter Front End
The PIC18LF46K22-E/PT suits pulse oximeter designs where the controller must run a precise LED timing sequence, sample two photodiode channels, and compute SpO2 in real time. Its CTMU peripheral provides a stable, calibrated current source for the red/IR LEDs, while the 12-bit-comparable 10-bit ADC with on-chip voltage reference delivers accurate light-intensity measurements. The 48MHz core sustains oversampling and DSP-style filtering within tight 1ms timing windows. nanoWatt XLP extends battery life between patient-monitoring sessions.
Recomendado
Industrial HMI Keypad & Display
The PIC18LF46K22-E/PT drives segmented LCDs or character OLEDs and scans 4x4 to 8x8 matrix keypads in industrial HMIs. The CTMU peripheral enables up to 16 capacitive touch keys with no external touch IC, reducing BOM cost and PCB area. Three hardware USART channels connect to RS-232/RS-485 transceivers, while the PMP interface drives up to 240-segment LCDs directly. The extended -40C to +125C temperature rating allows deployment in factory-floor enclosures without thermal derating.
Recomendado
USB-to-UART Bridge / Serial Console
The PIC18LF46K22-E/PT can implement a USB CDC bridge, exposing a virtual COM port to a host PC while presenting a UART to an embedded target. Its 48MHz core and 64KB Flash hold a full USB CDC ACM stack plus bootloader. The two hardware USART channels allow concurrent bridging (USB <-> UART0) and debug logging (UART1). The 1.8V to 3.3V supply matches modern low-voltage SoCs, eliminating level shifters on the UART side of the bridge.
Recomendado
Automotive LIN Slave Node
The PIC18LF46K22-E/PT's LIN-capable USART and extended -40C to +125C operating range suit automotive LIN slave applications such as window lifters, mirror controllers, or seat-adjustment switches. The 36 I/O pins drive multiple relays or H-bridges directly, while the 64KB Flash hosts LIN 2.x stack and application code. The 1.8V to 3.3V supply pairs with a 12V-to-3.3V automotive LDO. CTMU enables capacitive touch surfaces for switch panels without extra hardware.
Recomendado
Capacitive Touch User Interface
The PIC18LF46K22-E/PT implements capacitive touch keypads, sliders, and proximity sensors via its CTMU peripheral without an external touch controller. The CTMU produces calibrated current pulses for charge-time measurement, yielding reliable touch detection even through 3 mm of plastic. The 64KB Flash supports Microchip's mTouch firmware library and a small graphics or audio driver. nanoWatt XLP keeps average current low so battery-powered remotes can run for years on coin cells.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18LF46K22-E/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18F46K22-E/PT | PIC18LF45K22-E/PT | PIC18LF46K22-I/PT |
|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 64 KB | 64 KB | 32 KB (-50%) | 64 KB |
| SRAM | 3,896 B | 3,896 B | 1,536 B (-61%) | 3,896 B |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB |
| Max CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Supply Voltage | 1.8V-3.3V | 1.8V-5.5V (wider) | 1.8V-3.3V | 1.8V-3.3V |
| Operating Temperature | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I, narrower) |
| I/O Pins | 36 | 36 | 36 | 36 |
Diferenciadores clave
- Wider temperature range than -I grade drop-in alternative (frente a PIC18LF46K22-I/PT)
- 2x the Flash and 2.5x the SRAM of the 45K22 sibling (frente a PIC18LF45K22-E/PT)
- Lower maximum VDD than the F variant (frente a PIC18F46K22-E/PT)
Notas de diseño
Estimated: at 48MHz and 3.3V, the PIC18LF46K22 draws roughly 8 mA active; in sleep (nanoWatt XLP), typical current is <1 uA with RTCC enabled. For battery-life calculations, profile sleep current on the actual hardware - datasheet typicals (e.g. 50 nA) are at room temperature and nominal VDD. Decouple VDD/VSS pairs with a 100 nF ceramic placed within 3 mm of each pin pair to suppress switching noise that otherwise couples into ADC readings.
Route ICSP lines PGC/PGD (RB6/RB7) away from analog signals and high-current traces to avoid noise coupling during debugging. Place the MCLR pull-up (typically 10 kohm to VDD) close to the pin. When using an external crystal, keep the load capacitors within 5 mm of OSC1/OSC2 and guard the traces with a ground pour to reduce EMI emissions. For the 44-pin TQFP, expose the thermal pad to a copper pour for thermal relief, even though the device dissipates only a few hundred milliwatts.
Do not exceed 3.6V on VDD - the LF variant has an absolute maximum of 3.6V. Programming voltages on MCLR/VPP can reach 13V during high-voltage programming but must be removed before entering run mode. Configuration bits must be set explicitly to enable the on-chip LDO (envreg disabled for low-power), the watchdog timer behavior, and the oscillator mode (HS, XT, or internal HFINTOSC); mistakes here leave the part unprogrammed-looking. Brown-out reset (BOR) should always be enabled in production to avoid undefined behavior on slow VDD ramps.
Información de cumplimiento
Microchip product family is RoHS/REACH compliant per the manufacturer datasheet header. The -E temperature grade qualifies it for automotive/industrial environments but the part itself is not AEC-Q100 listed; for AEC-Q100 qualified PIC18 options, see PIC18F46K22-E/PTVAO or Microchip automotive-grade PIC18FxxKxx families.