PIC18LF66K40-I/PT - 64KB Flash 8-Bit XLP MCU 64-TQFP | Microchip
Référence : PIC18LF66K40-I/PT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.05 | $6,05 |
| 10 | $5.44 | $54,40 |
| 100 | $4.82 | $482,00 |
| 500 | $4.32 | $2 160,00 |
| 1 000 | $3.85 | $3 850,00 |
PIC18LF66K40-I/PT Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash, EEPROM, SRAM), peripherals, and I/O into one IC. Within that hierarchy, the PIC18LF66K40 belongs to the 8-bit MCU class (PIC18 core with modified Harvard architecture), then to the PIC18 K40 sub-family (low-power XLP family), and finally to the PIC18LF66K40 product line. This taxonomy matters for engineers selecting pin-compatible successors and for distributors organizing inventory. The 'LF' prefix indicates the low-voltage F-variant (1.8V-3.6V core); the 'F' (no L) variant PIC18F66K40 runs up to 5.5V.
Key features include 64KB Flash (32K x 16 words), 3.5KB RAM, integrated ECAN, multiple EUSART/I2C/SPI interfaces, 44 channels of 10-bit ADC, a 5-bit DAC, Core Independent Peripherals such as CWG and WWDT, and CRC/Memory scan. The I-grade operating temperature is -40C to +85C. The TQFP-64 (PT) package provides 54 usable I/O pins after power and ground allocation, suitable for mixed-signal designs that need both analog input density and digital connectivity.
The PIC18LF66K40 architecture uses Microchip's enhanced mid-range 8-bit core with a hardware multiplier, 16-bit instruction path, and C-optimized instruction set. The internal 64 MHz oscillator, 4x PLL, and instruction-cycle timing of 4 clocks give effective 16 MIPS throughput, adequate for sensor fusion, motor control loops, and protocol bridging. The XLP sleep modes draw nanoamp-class currents, enabling years of operation from a single coin cell in duty-cycled applications.
Typical applications include low-power IoT sensor nodes, industrial control with ECAN-based fieldbus nodes, USB-CAN bridges, automotive body controllers (non-safety subsystems), home automation, smart metering, battery-powered medical monitors, and capacitive-touch user interfaces using the mTouch peripheral. Designers favor this MCU when low sleep current and 5V-tolerant I/O are both required.
When designing with this device, allocate decoupling capacitors on every VDD/VSS pair, route the ECAN signals as a differential pair with 120 ohm termination, and verify that the chosen XLP sleep mode meets wake-up latency constraints. The internal 32 kHz oscillator (LFINTOSC) or Timer1 clock source should be selected before relying on RTC-like functionality.
This page synthesizes the manufacturer datasheet specification set, current distributor stock and price tiers, drop-in package-compatible alternatives, and practical design notes that are not consolidated on a single manufacturer or distributor page.
Alternatives de remplacement direct pour PIC18LF66K40-I/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 PIC18LF66K40-I/PT (même facteur de forme et même empreinte) — différant par Package, Program Memory (Flash), Core Architecture, I/O Pins, ADC.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC18F66K40-I/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18LF66K40-E/PT
✅ Remplacement direct✓ En stock
$2.4 / unité
Voir la fiche technique →PIC18LF66K40-H/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18F65K40-I/PT
✅ Remplacement direct✓ En stock
$1.95 / unité
Voir la fiche technique →PIC18LF65K40-I/PT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PIC18F46K40-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC18F67K40-I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.95 / unité
Voir la fiche technique →PIC18LF66K40-I/PT Valeurs maximales et caractéristiques électriques
| Core | PIC18 8-bit (modified Harvard) |
| CPU Speed | 64 MHz (16 MIPS when Fosc = 64 MHz, 4 clocks per instruction) |
| Program Flash | 64 KB (32K x 16 words) |
| Data RAM | 3.5 KB |
| Operating Voltage Range | 1.8 V to 5.5 V (LF core down to 1.8 V) |
| Plage de température de fonctionnement | -40 C to +85 C (I grade) |
| Boîtier | 64-pin TQFP (PT), 10 x 10 x 1 mm body |
| Type de montage | Surface Mount |
| I/O Pins | 54 (after power/ground allocation per datasheet) |
| ADC | 10-bit, up to 44 channels |
| DAC | 5-bit, 2 channels |
| Communication Interfaces | ECAN, 2x EUSART, 2x I2C/SMBus, 2x SPI |
| Timers | 8/16-bit timers, Capture/Compare/PWM modules |
| Core Independent Peripherals | CWG, WWDT, CRC/Memory scan, Hardware Limit Timer |
| Low-Power Technology | eXtreme Low Power (XLP) with nanoWatt sleep modes |
| Statut RoHS | Compliant |
Configuration des broches de PIC18LF66K40-I/PT
| Broche 1 | RA0 — PORTA digital I/O / analog input |
| Broche 2 | RA1 — PORTA digital I/O / analog input |
| Broche 3 | RA2 — PORTA digital I/O / analog input |
| Broche 4 | RA3 — PORTA digital I/O / analog input |
| Broche 5 | RA4 — PORTA digital I/O / analog input |
| Broche 6 | RA5 — PORTA digital I/O / analog input |
| Broche 7 | RA6 — PORTA digital I/O / analog input |
| Broche 8 | RA7 — PORTA digital I/O / analog input |
| Broche 9 | VSS — Ground reference |
| Broche 10 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Broche 11 | RB0 — PORTB digital I/O / analog input / interrupt-on-change |
| Broche 12 | RB1 — PORTB digital I/O / analog input / interrupt-on-change |
| Broche 13 | RB2 — PORTB digital I/O / analog input / interrupt-on-change |
| Broche 14 | RB3 — PORTB digital I/O / analog input / interrupt-on-change |
| Broche 15 | RB4 — PORTB digital I/O / analog input / interrupt-on-change |
| Broche 16 | RB5 — PORTB digital I/O / analog input / interrupt-on-change |
| Broche 17 | RB6 — PORTB digital I/O / analog input / interrupt-on-change / ICSP clock |
| Broche 18 | RB7 — PORTB digital I/O / analog input / interrupt-on-change / ICSP data |
| Broche 19 | VSS — Ground reference |
| Broche 20 | VDD — Positive supply voltage |
| Broche 21 | RC0 — PORTC digital I/O / analog input |
| Broche 22 | RC1 — PORTC digital I/O / analog input |
| Broche 23 | RC2 — PORTC digital I/O / analog input |
| Broche 24 | RC3 — PORTC digital I/O / analog input / SCL |
| Broche 25 | RC4 — PORTC digital I/O / analog input / SDA |
| Broche 26 | RC5 — PORTC digital I/O / analog input |
| Broche 27 | RC6 — PORTC digital I/O / analog input / TX |
| Broche 28 | RC7 — PORTC digital I/O / analog input / RX |
| Broche 29 | VSS — Ground reference |
| Broche 30 | VDD — Positive supply voltage |
| Broche 31 | RD0 — PORTD digital I/O |
| Broche 32 | RD1 — PORTD digital I/O |
| Broche 33 | RD2 — PORTD digital I/O |
| Broche 34 | RD3 — PORTD digital I/O |
| Broche 35 | RD4 — PORTD digital I/O |
| Broche 36 | RD5 — PORTD digital I/O |
| Broche 37 | RD6 — PORTD digital I/O |
| Broche 38 | RD7 — PORTD digital I/O |
| Broche 39 | VSS — Ground reference |
| Broche 40 | VDD — Positive supply voltage |
| Broche 41 | RE0 — PORTE digital I/O |
| Broche 42 | RE1 — PORTE digital I/O |
| Broche 43 | RE2 — PORTE digital I/O |
| Broche 44 | RE3 — PORTE digital I/O |
| Broche 45 | RE4 — PORTE digital I/O |
| Broche 46 | RE5 — PORTE digital I/O |
| Broche 47 | RE6 — PORTE digital I/O |
| Broche 48 | RE7 — PORTE digital I/O |
| Broche 49 | VSS — Ground reference |
| Broche 50 | VDD — Positive supply voltage |
| Broche 51 | RF0 — PORTF digital I/O |
| Broche 52 | RF1 — PORTF digital I/O |
| Broche 53 | RF2 — PORTF digital I/O |
| Broche 54 | RF3 — PORTF digital I/O |
| Broche 55 | RF4 — PORTF digital I/O |
| Broche 56 | RF5 — PORTF digital I/O |
| Broche 57 | RF6 — PORTF digital I/O |
| Broche 58 | RF7 — PORTF digital I/O |
| Broche 59 | VSS — Ground reference |
| Broche 60 | VDD — Positive supply voltage |
| Broche 61 | RG0 — PORTG digital I/O |
| Broche 62 | RG1 — PORTG digital I/O |
| Broche 63 | RG2 — PORTG digital I/O |
| Broche 64 | RG3 — PORTG digital I/O |
Applications typiques
PIC18LF66K40-I/PT convient pour 7 applications: Low-Power IoT Sensor Nodes, Industrial ECAN Fieldbus Nodes, Automotive Body Controllers, Smart Energy Meters, Home Automation Hubs, Battery-Powered Medical Monitors, Capacitive Touch User Interfaces.
Low-Power IoT Sensor Nodes
The PIC18LF66K40-I/PT fits battery-powered IoT sensor nodes because of its XLP nanoWatt sleep modes with sub-1 uA standby current and 1.8 V to 5.5 V VDD range, enabling years of operation from a coin cell. The 64 KB Flash holds over-the-air (OTA) update images plus application code, while 3.5 KB RAM handles sensor buffers and stack frames for BLE/Zigbee companion MCUs. The 64-pin TQFP footprint exposes 54 I/O lines for multi-sensor acquisition boards (temperature, humidity, motion, gas). Wake-up via Real-Time Clock Calendar or external interrupt enables duty-cycled sampling at <1% duty, where the part spends >99% of its life in sleep mode.
Recommandé
Industrial ECAN Fieldbus Nodes
The PIC18LF66K40-I/PT is a strong fit for industrial ECAN nodes requiring CAN 2.0B compliance, integrated ECAN controller, and 64-pin TQFP I/O density for valve, motor, and sensor interfaces. The 64 MHz core (16 MIPS) handles 1 Mbps CAN throughput plus upper-layer protocol stacks (CANopen, DeviceNet, J1939) without CPU starvation. The 44-channel 10-bit ADC reads process variables (pressure, flow, temperature), and the 5-bit DAC provides analog setpoint outputs. The XLP sleep mode supports truck and battery-backed systems where quiescent current is regulated to under 1 uA.
Recommandé
Automotive Body Controllers
The PIC18LF66K40-I/PT is used in non-safety automotive body controller modules where cost-effective 8-bit processing, LIN/CAN networking, and high I/O count are needed for door, lighting, and HVAC control. The PIC18LF66K40-E/PT (extended temperature, same TQFP-64 footprint) is qualified for under-hood operation from -40 C to +125 C. With 54 I/O pins, the MCU directly drives LED matrix tail lamps, PWM fan controllers, and multiple LIN slave nodes via its EUSART peripherals. AEC-Q100 qualification is not available on this part; for safety-critical subsystems, Microchip recommends the PIC18F66K40 family with automotive-grade part numbers.
Recommandé
Smart Energy Meters
The PIC18LF66K40-I/PT enables smart electricity, gas, and water meters with its 44 ADC channels for multi-phase power measurement, 64 KB Flash for metrology firmware plus security libraries, and XLP sleep modes for battery-backed tamper detection. The integrated ECAN peripheral supports utility grid communication (DLMS/COSEM over CAN), and the 54 I/O pins handle metrology IC interfaces, LCD drivers, and tamper switches. The 1.8 V to 5.5 V operating range allows direct operation from battery or metrology IC rails without additional LDOs.
Recommandé
Home Automation Hubs
The PIC18LF66K40-I/PT fits home automation hubs and bridge devices that aggregate wireless sensors and translate between Zigbee, BLE, Wi-Fi, and wired protocols. Its dual EUSART interfaces bridge to two radios simultaneously, the two SPI peripherals drive RGB LED drivers or TFT displays, and the I2C bus manages sensors. The 64 KB Flash stores application logic plus RF protocol stacks, while the ECAN peripheral enables integration with whole-home energy management systems. XLP sleep modes ensure standby power below 0.5 W for always-on hubs.
Recommandé
Battery-Powered Medical Monitors
The PIC18LF66K40-I/PT supports portable medical monitoring devices (pulse oximeters, glucometers, INR meters, wearable event monitors) due to its XLP nanoWatt sleep modes, 1.8 V to 5.5 V operation, and 54 I/O pins for sensor matrix, display, and user input. The 44-channel 10-bit ADC digitizes biosensor waveforms, while the 5-bit DAC drives audio prompts or analog references. The 64 KB Flash accommodates sensor calibration libraries and BLE stack, and the 3.5 KB RAM buffers biosignal frames during display update. Note: this part is not FDA-cleared or IEC 60601 qualified; medical certification is the integrator's responsibility.
Recommandé
Capacitive Touch User Interfaces
The PIC18LF66K40-I/PT drives capacitive touch keypads and sliders through Microchip's mTouch peripheral (implemented via CVD-based ADC and dedicated hardware), supporting up to 44 touch channels without external components. The 64 MHz core runs the mTouch library and event handling with low latency, while the 64 KB Flash holds touch patterns plus UI state machine. The XLP sleep mode keeps quiescent current under 5 uA between touches, critical for battery-powered remote controls and IoT wall switches. The 54 I/O lines support both touch sensing and traditional keypad/LED matrix simultaneously.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC18LF66K40-I/PT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC18F66K40-I/PT | PIC18LF66K40-E/PT | PIC18F65K40-I/PT | PIC18LF65K40-I/PT | PIC18F67K40-I/PT |
|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (PT) 10x10 mm | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same | 64-pin TQFP (PT) 10x10 mm - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit | PIC18 8-bit |
| CPU Speed | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Program Flash | 64 KB | 64 KB | 64 KB | 32 KB | 32 KB | 128 KB |
| Operating Voltage (VDD core) | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) | -40 C to +85 C (I grade) |
| I/O Pins | 54 | 54 | 54 | 54 | 54 | 54 |
| ECAN | Yes | Yes | Yes | Yes | Yes | Yes |
| XLP / nanoWatt | Yes | Yes | Yes | Yes | Yes | Yes |
Principaux différenciateurs
- Lowest VDD core range for sub-3.6 V battery systems (vs PIC18F66K40-I/PT)
- Twice the Flash memory of K65 family variants (vs PIC18F65K40-I/PT)
- Higher I/O count than 40/44-pin F46K40 family (vs PIC18F46K40-I/PT)
Notes de conception
The PIC18LF66K40-I/PT has six VDD/VSS pin pairs distributed around the 64-pin TQFP package. Place a 100 nF decoupling capacitor on each VDD pin pair, routed as short as possible (<3 mm trace) directly to the adjacent VSS pin. Add a single 10 uF bulk capacitor at the board input where the MCU is the highest-current IC. The VDD range of 1.8 V to 5.5 V allows direct battery connection but verify the chosen battery chemistry does not exceed 5.5 V under charge (e.g. lithium-ion 4.2 V max is safe). For sub-3.6 V designs, choose the LF variant to avoid the 2.3 V minimum core requirement of the F variant.
The 64-pin TQFP (PT) at 10x10 mm body uses 0.5 mm pitch leads. Use a 4-layer PCB with a continuous ground plane beneath the MCU to minimize EMI and provide a stable reference for the ADC. Trace analog inputs (RA/RE/RF/RG with ANx functions) away from digital switching signals and route them over a single unbroken ground plane. The ECAN RX/TX lines should be routed as an 100 ohm differential pair with 120 ohm termination at each end, and the trace length should be matched within 5 mm. The ICSP pins (RB6/RB7) should be brought to a 2x5 0.1 inch header for in-circuit programming and debugging.
Do not assume the LF variant runs at 5 V - the PIC18LF66K40-I/PT core tops out at 3.6 V even though the I/O pads tolerate 5 V inputs. If your design must regulate at 5 V without an external LDO, use the PIC18F66K40-I/PT instead. Do not exceed the ADC input range (VDD + 0.3 V); tie unused analog inputs to VSS or a known voltage rather than leaving them floating to avoid ADC noise pickup. The CONFIG words must be set to disable unused peripherals (ADC, ECAN) to achieve the lowest sleep current. When migrating from PIC18F45K22 to PIC18LF66K40, note that the ECAN peripheral location differs and the register map requires code changes.
Informations de conformité
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - for automotive safety-critical applications, use Microchip AEC-Q100 qualified variants in the PIC18F66K40 family (separate part numbers). Lead-free and halogen-free per Microchip material declaration. Conflict minerals compliance reported in Microchip's annual CMRT filing.
