PIC18LF46K22-E/PT - 64KB Flash 8-bit MCU 48MHz | Microchip
Référence : PIC18LF46K22-E/PT ✓ Actif| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour PIC18LF46K22-E/PT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC18LF46K22-E/PT (même facteur de forme et même empreinte) — différant par Package, I/O Pins, ADC, Program Memory (Flash), Core Architecture.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F46K22-E/PT
✅ Remplacement direct✓ En stock
$2.6 / unité
Voir la fiche technique →PIC18LF45K22-E/PT
✅ Remplacement direct✓ En stock
$2.38 / unité
Voir la fiche technique →PIC18LF46K22-I/PT
✅ Remplacement direct✓ En stock
$1.35 / unité
Voir la fiche technique →PIC18LF44K22-E/PT
✅ Remplacement direct✓ En stock
$1.7 / unité
Voir la fiche technique →PIC18LF43K22-E/P
✅ Remplacement direct✓ En stock
$1.74 / unité
Voir la fiche technique →PIC18LF46K22-E/PT Valeurs maximales et caractéristiques électriques
| 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 |
| Boîtier | 44-pin TQFP (PT), 10x10 mm |
| Type de montage | Surface Mount |
| Température de fonctionnement | -40C to +125C (Extended, -E suffix) |
| Low-Power Technology | nanoWatt XLP |
| In-Circuit Debug | ICSP / JTAG |
| Statut RoHS | Compliant |
Configuration des broches de PIC18LF46K22-E/PT
| Broche 1 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| Broche 2 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / Voltage reference plus |
| Broche 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Broche 4 | RA5/AN4/SS1/HLVDIN — Port A bit 5 / Analog input 4 / SPI1 slave select / HLVD input |
| Broche 5 | RA6 — Port A bit 6 (general I/O) |
| Broche 6 | RA7 — Port A bit 7 (general I/O) |
| Broche 7 | VSS — Ground reference |
| Broche 8 | VDD — Positive supply (1.8V-3.3V) |
| Broche 9 | OSC1/CLKI/RA7 — Oscillator crystal input / external clock input |
| Broche 10 | OSC2/CLKO/RA6 — Oscillator crystal output / clock output |
| Broche 11 | RC0/SOSCO — Port C bit 0 / Secondary oscillator output |
| Broche 12 | RC1/SOSCI — Port C bit 1 / Secondary oscillator input |
| Broche 13 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| Broche 14 | RC3/SCL1 — Port C bit 3 / I2C1 clock |
| Broche 15 | RC4/SDA1 — Port C bit 4 / I2C1 data |
| Broche 16 | RC5/SDO1 — Port C bit 5 / SPI1 data out |
| Broche 17 | RC6/TX1/CK1 — Port C bit 6 / USART1 transmit / clock |
| Broche 18 | RC7/RX1/DT1 — Port C bit 7 / USART1 receive / data |
| Broche 19 | VSS — Ground reference |
| Broche 20 | VDD — Positive supply |
| Broche 21 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 |
| Broche 22 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Broche 23 | RB2/INT2/CTED1 — Port B bit 2 / External interrupt 2 / CTMU edge 1 |
| Broche 24 | RB3/INT3/CTED2 — Port B bit 3 / External interrupt 3 / CTMU edge 2 |
| Broche 25 | RB4 — Port B bit 4 (general I/O) |
| Broche 26 | RB5 — Port B bit 5 (general I/O) |
| Broche 27 | RB6/PGC — Port B bit 6 / ICSP clock |
| Broche 28 | RB7/PGD — Port B bit 7 / ICSP data |
| Broche 29 | MCLR/VPP/RE3 — Master clear / Programming voltage / Port E bit 3 |
| Broche 30 | RA0/AN0/ULPWU — Port A bit 0 / Analog input 0 / Ultra-low-power wake-up |
| Broche 31 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Broche 32 | VSS — Ground reference |
| Broche 33 | RD0 — Port D bit 0 |
| Broche 34 | RD1 — Port D bit 1 |
| Broche 35 | RD2 — Port D bit 2 |
| Broche 36 | RD3 — Port D bit 3 |
| Broche 37 | RD4 — Port D bit 4 |
| Broche 38 | RD5 — Port D bit 5 |
| Broche 39 | RD6 — Port D bit 6 |
| Broche 40 | RD7 — Port D bit 7 |
| Broche 41 | VSS — Ground reference |
| Broche 42 | VDD — Positive supply |
| Broche 43 | RE0 — Port E bit 0 |
| Broche 44 | RE1 — Port E bit 1 |
Applications typiques
PIC18LF46K22-E/PT convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LF46K22-E/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Wider temperature range than -I grade drop-in alternative (vs PIC18LF46K22-I/PT)
- 2x the Flash and 2.5x the SRAM of the 45K22 sibling (vs PIC18LF45K22-E/PT)
- Lower maximum VDD than the F variant (vs PIC18F46K22-E/PT)
Notes de conception
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.
Informations de conformité
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.