PIC18LF46K22-E/PT - 64KB Flash 8-bit MCU 48MHz | Microchip
MPN: PIC18LF46K22-E/PT ✓ פעילPIC18LF46K22-E/PT סקירה
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.
חלופות תחליף ישיר עבור PIC18LF46K22-E/PT — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC18LF46K22-E/PT (אותו גורם צורה וטביעת רגל) — שונים ב Package, I/O Pins, ADC, Program Memory (Flash), Core Architecture.
PIC18F46K22-E/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF45K22-E/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF46K22-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF44K22-E/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF43K22-E/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LF46K22-E/PT דירוגים מרביים ומאפיינים חשמליים
| 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 |
| מארז | 44-pin TQFP (PT), 10x10 mm |
| סוג הרכבה | Surface Mount |
| טמפרטורת פעולה | -40C to +125C (Extended, -E suffix) |
| Low-Power Technology | nanoWatt XLP |
| In-Circuit Debug | ICSP / JTAG |
| סטטוס RoHS | Compliant |
תצורת פינים של PIC18LF46K22-E/PT
| פין 1 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| פין 2 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / Voltage reference plus |
| פין 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| פין 4 | RA5/AN4/SS1/HLVDIN — Port A bit 5 / Analog input 4 / SPI1 slave select / HLVD input |
| פין 5 | RA6 — Port A bit 6 (general I/O) |
| פין 6 | RA7 — Port A bit 7 (general I/O) |
| פין 7 | VSS — Ground reference |
| פין 8 | VDD — Positive supply (1.8V-3.3V) |
| פין 9 | OSC1/CLKI/RA7 — Oscillator crystal input / external clock input |
| פין 10 | OSC2/CLKO/RA6 — Oscillator crystal output / clock output |
| פין 11 | RC0/SOSCO — Port C bit 0 / Secondary oscillator output |
| פין 12 | RC1/SOSCI — Port C bit 1 / Secondary oscillator input |
| פין 13 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| פין 14 | RC3/SCL1 — Port C bit 3 / I2C1 clock |
| פין 15 | RC4/SDA1 — Port C bit 4 / I2C1 data |
| פין 16 | RC5/SDO1 — Port C bit 5 / SPI1 data out |
| פין 17 | RC6/TX1/CK1 — Port C bit 6 / USART1 transmit / clock |
| פין 18 | RC7/RX1/DT1 — Port C bit 7 / USART1 receive / data |
| פין 19 | VSS — Ground reference |
| פין 20 | VDD — Positive supply |
| פין 21 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 |
| פין 22 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| פין 23 | RB2/INT2/CTED1 — Port B bit 2 / External interrupt 2 / CTMU edge 1 |
| פין 24 | RB3/INT3/CTED2 — Port B bit 3 / External interrupt 3 / CTMU edge 2 |
| פין 25 | RB4 — Port B bit 4 (general I/O) |
| פין 26 | RB5 — Port B bit 5 (general I/O) |
| פין 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| פין 28 | RB7/PGD — Port B bit 7 / ICSP data |
| פין 29 | MCLR/VPP/RE3 — Master clear / Programming voltage / Port E bit 3 |
| פין 30 | RA0/AN0/ULPWU — Port A bit 0 / Analog input 0 / Ultra-low-power wake-up |
| פין 31 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| פין 32 | VSS — Ground reference |
| פין 33 | RD0 — Port D bit 0 |
| פין 34 | RD1 — Port D bit 1 |
| פין 35 | RD2 — Port D bit 2 |
| פין 36 | RD3 — Port D bit 3 |
| פין 37 | RD4 — Port D bit 4 |
| פין 38 | RD5 — Port D bit 5 |
| פין 39 | RD6 — Port D bit 6 |
| פין 40 | RD7 — Port D bit 7 |
| פין 41 | VSS — Ground reference |
| פין 42 | VDD — Positive supply |
| פין 43 | RE0 — Port E bit 0 |
| פין 44 | RE1 — Port E bit 1 |
יישומים טיפוסיים
PIC18LF46K22-E/PT מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC18LF46K22-E/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Wider temperature range than -I grade drop-in alternative (לעומתPIC18LF46K22-I/PT)
- 2x the Flash and 2.5x the SRAM of the 45K22 sibling (לעומתPIC18LF45K22-E/PT)
- Lower maximum VDD than the F variant (לעומתPIC18F46K22-E/PT)
הערות תכנון
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.
מידע על תאימות
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.