PIC18F4680T-I/ML - 8-Bit 40MHz MCU, 64KB Flash, ECAN, 44-QFN
MPN: PIC18F4680T-I/ML ✓ פעילPIC18F4680T-I/ML סקירה
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM), timers, communication peripherals (UART, SPI, I2C, CAN, USB), analog peripherals (ADC, comparators), and digital I/O onto one silicon die. PIC18 microcontrollers use a RISC-based Harvard architecture with separate program and data buses, enabling most instructions to execute in a single instruction cycle. In the broader hierarchy, the PIC18F4680 belongs to: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor -> electronic component.
Key differentiating features include ECAN 2.0B active controller with multiple transmit/receive buffers, the nanoWatt power-managed sleep modes with ultra-low standby current, 10 MIPS throughput at 40 MHz, 1024 bytes of EEPROM for non-volatile data storage without external serial EEPROM, and an internal oscillator selectable via configuration fuses. The wide 4.2V to 5.5V supply range suits automotive and industrial 5V systems. The 44-QFN (8x8 mm) footprint with exposed thermal pad reduces board area versus TQFP-44 alternatives by approximately 35% and improves thermal dissipation.
Typical applications include automotive body and chassis ECAN nodes, OBD-II diagnostic interfaces, industrial CAN-bopen slave devices, building automation controllers, and LIN-based sensor nodes. The 5V-tolerant digital I/O simplifies connection to legacy 5V logic, while the 12-bit ADC provides sufficient resolution for sensor conditioning without an external analog front end.
When designing with this device, verify Vdd decoupling is placed within 5 mm of the pins and that MCLR is pulled high through a 10-50 kohm resistor with a 100 nF capacitor for reliable reset operation. The ECAN module requires a CAN transceiver IC (such as MCP2551 or MCP2561) external to the MCU; the PIC18F4680 does not include the physical-layer transceiver.
This page consolidates distributor pricing, same-brand and cross-brand drop-in alternatives in the 44-QFN footprint, and practical design notes not found in any single manufacturer datasheet, providing an unbiased comparison reference for procurement and engineering teams.
חלופות תחליף ישיר עבור PIC18F4680T-I/ML — 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 PIC18F4680T-I/ML (אותו גורם צורה וטביעת רגל) — שונים ב Operating Temperature, Package, ADC, Program Memory (Flash), Communication Peripherals.
PIC18F4680-I/ML
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F4680T-E/ML
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F4480T-I/ML
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F4685T-I/ML
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F4585T-I/ML
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F4682T-I/ML
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC18F4680T-I/ML דירוגים מרביים ומאפיינים חשמליים
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC18F |
| Core Architecture | PIC18 RISC (Harvard) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| SRAM | 3328 bytes |
| Data EEPROM | 1024 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (Vdd) | 4.2 V to 5.5 V |
| Digital I/O Pins | 36 |
| ADC | 12-bit, up to 11 channels |
| CAN Module | ECAN 2.0B Active |
| Communication Peripherals | ECAN, USART (LIN), MSSP (I2C/SPI) |
| Timers | Timer0/1/2/3 + Watchdog Timer |
| טמפרטורת פעולה | -40C to +85C (Industrial, "I") |
| מארז | 44-QFN (8x8 mm) with exposed pad ("ML") |
| Package Type Suffix | T = Tape & Reel |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
| Internal Oscillator | Yes, configurable via fuses |
| Power-Saving Modes | nanoWatt (sleep/alternate/ultra-low) |
תצורת פינים של PIC18F4680T-I/ML
| פין 1 | OSC1/CLKI/RA7 — External oscillator input or general I/O |
| פין 2 | OSC2/CLKO/RA6 — External oscillator output or general I/O |
| פין 3 | MCLR/RE3 — Master Clear reset input (active-low) or digital-only I/O |
| פין 4 | RA0/AN0/C1IN+ — Digital I/O / analog input 0 / comparator input |
| פין 5 | RA1/AN1/C2IN+ — Digital I/O / analog input 1 / comparator input |
| פין 6 | RA2/AN2/C2IN-/CVref — Digital I/O / analog input 2 / comparator reference |
| פין 7 | RA3/AN3/C1IN0+/Vref+ — Digital I/O / analog input 3 / ADC Vref+ |
| פין 8 | RA4/AN4/T0CKI/C1OUT — Digital I/O / analog input 4 / Timer0 clock / comparator output |
| פין 9 | RA5/AN5/SS/LVDIN/C2OUT — Digital I/O / analog input 5 / SPI slave select / comparator output |
| פין 10 | Vdd — Power supply +5V |
| פין 11 | Vss — Ground (digital) |
| פין 12 | RB0/AN12/INT0 — Digital I/O / external interrupt 0 |
| פין 13 | RB1/AN10/INT1 — Digital I/O / external interrupt 1 |
| פין 14 | RB2/AN8/INT2/CANTX — Digital I/O / ECAN transmit output |
| פין 15 | RB3/AN9/INT3/CANRX — Digital I/O / ECAN receive input |
| פין 16 | RB4/AN11 — Digital I/O / analog input 11 |
| פין 17 | RB5/KBI1/PGM — Digital I/O / interrupt-on-change / LVP programming |
| פין 18 | RB6/KBI2/PGC — Digital I/O / ICSP clock |
| פין 19 | RB7/KBI3/PGD — Digital I/O / ICSP data |
| פין 20 | RC0/CTX1/T1CKI — Digital I/O / ECAN TX (alt) / Timer1 input |
| פין 21 | RC1/RX1/DT1 — Digital I/O / ECAN RX (alt) / sync serial clock |
| פין 22 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM 1 |
| פין 23 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| פין 24 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| פין 25 | RC5/SDO — Digital I/O / SPI data out |
| פין 26 | RC6/TX1/CK1 — Digital I/O / USART1 async transmit |
| פין 27 | RC7/RX1/DT1 — Digital I/O / USART1 async receive |
| פין 28 | RE0/RD/AN6 — Digital I/O / parallel slave port read / analog input |
| פין 29 | RE1/WR/AN7 — Digital I/O / parallel slave port write / analog input |
| פין 30 | RE2/CS/AN5 — Digital I/O / parallel slave port chip select |
| פין 31 | AVdd — Analog power supply (tie to Vdd) |
| פין 32 | AVss — Analog ground (tie to Vss) |
| פין 33 | RD0/PSP0/C1IN+ — Digital I/O / parallel slave port bit 0 |
| פין 34 | RD1/PSP1/C2IN+ — Digital I/O / parallel slave port bit 1 |
| פין 35 | RD2/PSP2 — Digital I/O / parallel slave port bit 2 |
| פין 36 | RD3/PSP3 — Digital I/O / parallel slave port bit 3 |
| פין 37 | RD4/PSP4/ECCP1 — Digital I/O / parallel slave port bit 4 / Enhanced CCP |
| פין 38 | RD5/PSP5 — Digital I/O / parallel slave port bit 5 |
| פין 39 | RD6/PSP6 — Digital I/O / parallel slave port bit 6 |
| פין 40 | RD7/PSP7 — Digital I/O / parallel slave port bit 7 |
| פין 41 | RF6/AN11 — Digital I/O / analog input 11 (alt) |
| פין 42 | RF7/SS1 — Digital I/O / SPI1 slave select |
| פין 43 | Vss — Ground (digital) |
| פין 44 | Vdd — Power supply +5V |
יישומים טיפוסיים
PIC18F4680T-I/ML מתאים עבור 6 יישוםs: Automotive ECAN Node (Body/Chassis), OBD-II Diagnostic / Scan Tool Interface, Industrial CAN-bus Slave / Building Automation, LIN-based Sensor / Actuator Node, USB-less Serial Protocol Bridge / SPI-to-UART, Industrial Control HMI Front-End.
Automotive ECAN Node (Body/Chassis)
The PIC18F4680T-I/ML's ECAN 2.0B Active controller with multiple transmit/receive buffers and acceptance filters makes it ideal as a body- and chassis-level CAN node controller in automotive applications where 5V tolerance, industrial temperature range (-40C to +85C), and 64 KB Flash are required. The MCU runs at 10 MIPS, providing enough cycles to handle CAN message scheduling plus LIN slave-side processing, and the 12-bit ADC with up to 11 channels can read 3-5 sensor inputs (temperature, position, switch) without external components. In a typical body control module the PIC18F4680T-I/ML sits between the MCP2561 CAN transceiver and the actuator loads, processing ECU commands over ECAN and replying with sensor status; the tape-and-reel "T" packaging suits high-volume automotive assembly lines. This combination provides a footprint-efficient QFN-based node for powertrain-adjacent or body-comfort networks where PWM-controlled actuators or fan drivers are also present.
מומלץ
OBD-II Diagnostic / Scan Tool Interface
The PIC18F4680T-I/ML directly supports OBD-II onboard diagnostics thanks to its on-die ECAN controller, LIN-capable USART, and ample Flash (64 KB) for OBD-II/SAE J1979 PID parsing. The 12-bit ADC captures analog signals from sensors, while the 1024 bytes of EEPROM reliably store vehicle identification, calibration tables, and fault codes across power cycles; the 3328 B SRAM buffers burst CAN traffic during PID polling. When the device is placed at the diagnostic link connector, a low-side driver IC may be switched externally while the ECAN module decodes the request-response frames autonomously. Compared to using an external stand-alone CAN controller, the integrated ECAN saves PCB area and BOM cost. This application benefits from the QFN footprint for compact handheld scan tools where chassis size is a primary constraint.
מומלץ
Industrial CAN-bus Slave / Building Automation
In industrial CAN-bus networks and building-automation controllers, the PIC18F4680T-I/ML operates reliably across the full industrial -40C to +85C range, with 5V-tolerant I/O simplifying interface to legacy 5V industrial buses. Its 10 MIPS core plus on-die ECAN provides deterministic real-time response for HVAC damper control, lighting ballast control, and access-control modules where Modbus/CAN bridging is needed. The 36 digital I/O pins directly drive relay drivers, opto-coupled inputs, and rotary encoder inputs without an external I/O expander, and the 12-bit ADC reads 0-10 V sensor inputs through a simple resistor divider. Combined with nanoWatt sleep modes (sub-microamp standby), the device is well-suited to battery-backed or solar-powered building nodes. The QFN exposed thermal pad enables continuous 40 MHz operation inside enclosed control panels without active cooling.
מומלץ
LIN-based Sensor / Actuator Node
The PIC18F4680T-I/ML's LIN-capable USART plus 12-bit ADC make it ideal for LIN-based sensor and actuator nodes common in automotive door modules, seat controllers, and HVAC flaps where LIN is the dominant sub-bus. The 64 KB Flash accommodates LIN-stack plus application-specific signal processing (PWM generation, low-frequency filtering) without external memory. Its 5V-tolerant I/O connects directly to LIN transceivers (MCP2003/MCP2025) and the ECAN module is deactivated to reclaim pins for additional PWM outputs. In a power-window module, the MCU drives H-bridge FETs via PWM using on-chip timers and reports window position over LIN. The exposed thermal pad of the 44-QFN package supports the continuous current-driving capability needed for repeated actuator cycles.
מומלץ
USB-less Serial Protocol Bridge / SPI-to-UART
Although the PIC18F4680T-I/ML lacks native USB, its MSSP (I2C/SPI) and USART make it a common choice as a serial protocol bridge - converting SPI or I2C peripherals to UART/USB-attached hosts. The 64 KB Flash accommodates dual-stack protocol firmware, while the 1024-byte EEPROM allows tunable baud rates and protocol parameters to be stored across reboots. The 12-bit ADC enables a digital/analog hybrid role such as HVAC controllers where the chip both adapts sensor SPI to a CAN master and generates PWM outputs for fan speed control. The 44-QFN footprint suits compact industrial sensor hubs placed inline on backplanes.
מומלץ
Industrial Control HMI Front-End
In human-machine interface (HMI) front-ends like industrial keypads, dial controllers, and small numerical displays, the PIC18F4680T-I/ML provides ample Flash and RAM to drive LCD or LED matrix displays, while the ECAN module communicates field status back to a master PLC. The exposed thermal pad of the 44-QFN package handles the inrush heating of multiplexed LED matrices, and the 36 I/O drive the matrix rows/columns directly without an external display driver. The 12-bit ADC reads rotary encoder analog taps or touch-sensor signals; the nanoWatt power-managed sleep extends battery life in wireless or PoE-attached HMIs. The QFN footprint integrates well on double-sided panels where TQFP-44 alternatives would consume excessive board area.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC18F4680T-I/ML — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC18F4680-I/ML | PIC18F4680T-E/ML | PIC18F4480T-I/ML | PIC18F4685T-I/ML | PIC18F4585T-I/ML | PIC18F4682T-I/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Flash Program Memory | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 96 KB (+50%) | 48 KB (-25%) | 80 KB (+25%) |
| SRAM | 3328 bytes | 3328 bytes | 3328 bytes | 1920 bytes (-42%) | 3328 bytes | 3328 bytes | 3328 bytes |
| Data EEPROM | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes |
| CPU Max Speed | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS |
| Operating Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| CAN Module | ECAN 2.0B Active | ECAN 2.0B Active | ECAN 2.0B Active | ECAN 2.0B Active | ECAN 2.0B Active | ECAN 2.0B Active | ECAN 2.0B Active |
| Approx. Qty-1 Price (USD, as of 2026-09-28) | $9.40 | $9.10 | $10.25 | $8.85 | $10.10 | $9.20 | $9.65 |
מבדילים עיקריים
- Highest Flash density among Microchip 44-QFN ECAN pinout members in its tier (לעומתPIC18F4585T-I/ML)
- Industrial temperature rating matches tape-and-reel mass-production needs while keeping PCB footprint (לעומתPIC18F4680T-E/ML)
- Perfect mid-density Flash alternative to 32 KB PIC18F4480 family (לעומתPIC18F4480T-I/ML)
הערות תכנון
Power-supply decoupling for PIC18F4680T-I/ML: place a 100 nF X7R ceramic capacitor within 5 mm of each Vdd/AVdd pin pair, and add a single bulk 10 uF tantalum or aluminum-polymer capacitor within 25 mm of the package. The Microchip datasheet specifies Vdd = 4.2 V to 5.5 V; the AVdd pin must be tied to Vdd with its own dedicated 100 nF + 10 uF filter, and AVss tied to Vss, to keep ADC reference noise below 1 LSB at 12-bit resolution. Estimated AVdd ripple target: keep supply noise below +/-50 mV to avoid ADC accuracy degradation.
MCLR reset circuit: route the MCLR pin to a 10 kohm pull-up to Vdd with a 100 nF to 1 uF capacitor to ground; do not leave MCLR floating. Failing to reset properly is a common source of 'stuck-in-bootloader' symptoms when ICSP is connected. Also, configure the configuration fuses (CONFIG1L through CONFIG5L) correctly for the chosen oscillator source; the nanoWatt low-power timer1 oscillator requires separate fuse bits. According to the Microchip datasheet, missing the configuration bits set leads to unpredictable startup behavior.
QFN thermal management: the 44-QFN (8x8 mm) package has an exposed thermal pad on its underside that MUST be soldered to a PCB copper pour to achieve the datasheet's rated electrical performance. Recommended PCB footprint: continuous 50x50 mm copper area on the top layer under the QFN, with thermal vias (12-16 vias of 0.3 mm drill on a 1.0 mm pitch) connecting to an inner ground plane. Estimated theta_JA reduction: from ~35 C/W (no thermal pad) to ~18 C/W (full thermal pad soldered), allowing continuous 40 MHz operation at 5V without derating.
ECAN bus layout: when using the on-chip ECAN controller, keep the CANH/CANL traces between the PIC18F4680T-I/ML and the MCP2561/MCP2551 transceiver short and impedance-matched (characteristic impedance near 120 ohm). Place the 120 ohm termination resistor at the cable end, not at the MCU side. Per the Microchip ECAN application note family, ground-plane splits under the ECAN traces should be avoided to prevent radiated emissions, and the ECAN clock output (CANTX) should be routed away from sensitive analog input traces to prevent coupling.
מידע על תאימות
RoHS-compliant per Microchip product page. The PIC18F4680T-I/ML (industrial grade 'I') is not AEC-Q100 qualified; the E-grade variant (PIC18F4680T-E/ML) supports the extended automotive temperature range but is still not AEC-Q100 qualified - verify with automotive project teams if AEC-Q100 is required.
