PIC18LF46K22-E/PT - 64KB Flash 8-bit MCU 48MHz | Microchip
MPN: PIC18LF46K22-E/PT ✓ Hoạt độngPIC18LF46K22-E/PT Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF46K22-E/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF46K22-E/PT (cùng hình factor và footprint) — khác nhau ở Package, I/O Pins, ADC, Program Memory (Flash), Core Architecture.
PIC18F46K22-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF45K22-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K22-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF44K22-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF43K22-E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K22-E/PT Tỷ lệ tối đa & tính chất điện
| 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 |
| Hộp | 44-pin TQFP (PT), 10x10 mm |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +125C (Extended, -E suffix) |
| Low-Power Technology | nanoWatt XLP |
| In-Circuit Debug | ICSP / JTAG |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF46K22-E/PT
| Chân 1 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Chân 2 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / Voltage reference plus |
| Chân 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Chân 4 | RA5/AN4/SS1/HLVDIN — Port A bit 5 / Analog input 4 / SPI1 slave select / HLVD input |
| Chân 5 | RA6 — Port A bit 6 (general I/O) |
| Chân 6 | RA7 — Port A bit 7 (general I/O) |
| Chân 7 | VSS — Ground reference |
| Chân 8 | VDD — Positive supply (1.8V-3.3V) |
| Chân 9 | OSC1/CLKI/RA7 — Oscillator crystal input / external clock input |
| Chân 10 | OSC2/CLKO/RA6 — Oscillator crystal output / clock output |
| Chân 11 | RC0/SOSCO — Port C bit 0 / Secondary oscillator output |
| Chân 12 | RC1/SOSCI — Port C bit 1 / Secondary oscillator input |
| Chân 13 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| Chân 14 | RC3/SCL1 — Port C bit 3 / I2C1 clock |
| Chân 15 | RC4/SDA1 — Port C bit 4 / I2C1 data |
| Chân 16 | RC5/SDO1 — Port C bit 5 / SPI1 data out |
| Chân 17 | RC6/TX1/CK1 — Port C bit 6 / USART1 transmit / clock |
| Chân 18 | RC7/RX1/DT1 — Port C bit 7 / USART1 receive / data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply |
| Chân 21 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 |
| Chân 22 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Chân 23 | RB2/INT2/CTED1 — Port B bit 2 / External interrupt 2 / CTMU edge 1 |
| Chân 24 | RB3/INT3/CTED2 — Port B bit 3 / External interrupt 3 / CTMU edge 2 |
| Chân 25 | RB4 — Port B bit 4 (general I/O) |
| Chân 26 | RB5 — Port B bit 5 (general I/O) |
| Chân 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| Chân 28 | RB7/PGD — Port B bit 7 / ICSP data |
| Chân 29 | MCLR/VPP/RE3 — Master clear / Programming voltage / Port E bit 3 |
| Chân 30 | RA0/AN0/ULPWU — Port A bit 0 / Analog input 0 / Ultra-low-power wake-up |
| Chân 31 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Chân 32 | VSS — Ground reference |
| Chân 33 | RD0 — Port D bit 0 |
| Chân 34 | RD1 — Port D bit 1 |
| Chân 35 | RD2 — Port D bit 2 |
| Chân 36 | RD3 — Port D bit 3 |
| Chân 37 | RD4 — Port D bit 4 |
| Chân 38 | RD5 — Port D bit 5 |
| Chân 39 | RD6 — Port D bit 6 |
| Chân 40 | RD7 — Port D bit 7 |
| Chân 41 | VSS — Ground reference |
| Chân 42 | VDD — Positive supply |
| Chân 43 | RE0 — Port E bit 0 |
| Chân 44 | RE1 — Port E bit 1 |
Ứng dụng tiêu biểu
PIC18LF46K22-E/PT phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF46K22-E/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Wider temperature range than -I grade drop-in alternative (vsPIC18LF46K22-I/PT)
- 2x the Flash and 2.5x the SRAM of the 45K22 sibling (vsPIC18LF45K22-E/PT)
- Lower maximum VDD than the F variant (vsPIC18F46K22-E/PT)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.