PIC18LF4680T-I/PT - 40MHz 8-bit MCU w/ CAN & 64KB Flash | Microchip
MPN: PIC18LF4680T-I/PT ✓ نشطPIC18LF4680T-I/PT نظرة عامة
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, peripherals, and I/O into one package. The PIC18F family sits within the broader taxonomy of microcontroller -> embedded controller -> semiconductor -> integrated circuit. The 'LF' prefix designates the low-voltage F-series variant operating across 2.0V to 5.5V, which targets battery-powered and energy-conscious designs via Microchip's nanoWatt Technology for dynamic power management.
Key features include an integrated Enhanced CAN (ECAN) module, hardware USART, I2C, SPI, and Parallel Slave Port (PSP) interfaces, 11 channels of 10-bit ADC, two capture/compare/PWM (CCP) modules, and an enhanced capture/compare/PWM (ECCP) module. The device also integrates a 16-bit timer, two 8-bit timers, and nanoWatt power management including idle, sleep, and run modes with on-the-fly clock switching.
The architecture pairs a Harvard-style CPU with separate program and data buses, which lets the 40MHz oscillator fetch instructions in parallel with data accesses for deterministic throughput. The Enhanced CAN module provides hardware acceptance filters, multiple transmit/receive buffers, and supports both standard and extended identifiers, removing the host CPU from heavy protocol processing.
Typical applications include automotive body and chassis networks, industrial CAN-based sensor hubs, building automation gateways, embedded control boards, and portable medical devices. The wide 2.0-5.5V operating range and nanoWatt modes also make it suitable for battery-backed telemetry nodes and remote sensor interfaces.
When designing with the PIC18LF4680T-I/PT, ensure decoupling capacitors are placed within 4mm of each power pin, and that the CAN bus is terminated with 120 ohm resistors at each end of the network. The 'T' suffix denotes tape-and-reel packaging for high-volume assembly, while the 'I' grade indicates an operating temperature range of -40C to +85C suitable for industrial environments.
This page synthesizes distributor pricing, drop-in TQFP-44 alternatives, and practical design notes drawn from the PIC18F2585/2680/4585/4680 datasheet, providing context not found in any single manufacturer or distributor page.
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الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18LF4680T-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Program Memory (Flash), ADC, Core Architecture, Timers.
PIC18F4680-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F4685-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4580-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4585-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4480-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F458-I/PT
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF4680T-I/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC18 (8-bit RISC, Harvard) |
| أقصى تردد للساعة | 40 MHz (12 MIPS) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 3.25 KB (3328 bytes) |
| Data EEPROM | 1 KB |
| ADC Resolution | 10 bit, 11 channels |
| جهد التغذية | 2.0 V to 5.5 V |
| درجة حرارة التشغيل | -40 C to +85 C (Industrial) |
| I/O Pins | 36 (general-purpose) / 34 (I/O Ports per datasheet summary) |
| العلبة | TQFP-44 (10 x 10 mm) |
| نوع التركيب | Surface Mount (Tape & Reel) |
| Communication Interfaces | ECAN, USART, I2C, SPI, PSP |
| Timer Modules | 2x 8-bit, 1x 16-bit, 2x CCP, 1x ECCP |
| Power-Saving Modes | nanoWatt Technology (Idle, Sleep, Run, Clock Switching) |
| Lead-Free / RoHS | Yes (per Microchip product page) |
تكوين أطراف PIC18LF4680T-I/PT
| دبوس 1 | RA0/AN0 — Digital I/O RA0 / Analog input AN0 |
| دبوس 2 | RA1/AN1 — Digital I/O RA1 / Analog input AN1 |
| دبوس 3 | RA2/AN2 — Digital I/O RA2 / Analog input AN2 |
| دبوس 4 | RA3/AN3/VREF+ — Digital I/O RA3 / Analog input AN3 / ADC VREF+ |
| دبوس 5 | RA4/T0CKI — Digital I/O RA4 / Timer0 clock input |
| دبوس 6 | RA5/AN4/SS/HLVDIN — Digital I/O RA5 / Analog input AN4 / SSP select / HLVD input |
| دبوس 7 | RA6/OSC2/CLKO — Digital I/O RA6 / Oscillator output / Clock output |
| دبوس 8 | RA7/OSC1/CLKI — Digital I/O RA7 / Oscillator input / Clock input |
| دبوس 9 | RB0/INT0/FLT0 — Digital I/O RB0 / External interrupt 0 / PWM fault input |
| دبوس 10 | RB1/INT1 — Digital I/O RB1 / External interrupt 1 |
| دبوس 11 | RB2/INT2/CANTX — Digital I/O RB2 / External interrupt 2 / CAN TX |
| دبوس 12 | RB3/INT3/CANRX — Digital I/O RB3 / External interrupt 3 / CAN RX |
| دبوس 13 | RB4/INT4/KBI0 — Digital I/O RB4 / External interrupt 4 / Keyboard interrupt |
| دبوس 14 | RB5/KBI1/PGM — Digital I/O RB5 / Keyboard interrupt / LVP program |
| دبوس 15 | RB6/KBI2/PGC — Digital I/O RB6 / Keyboard interrupt / ICSP clock |
| دبوس 16 | RB7/KBI3/PGD — Digital I/O RB7 / Keyboard interrupt / ICSP data |
| دبوس 17 | VDD — Positive supply (3.3V or 5V) |
| دبوس 18 | VSS — Ground |
| دبوس 19 | RC0/T1OSO/T1CKI — Digital I/O RC0 / Timer1 oscillator output / Timer1 clock |
| دبوس 20 | RC1/T1OSI/CCP2 — Digital I/O RC1 / Timer1 oscillator input / CCP2 output |
| دبوس 21 | RC2/CCP1 — Digital I/O RC2 / CCP1 output |
| دبوس 22 | RC3/SCK/SCL — Digital I/O RC3 / SPI clock / I2C clock |
| دبوس 23 | RC4/SDI/SDA — Digital I/O RC4 / SPI data in / I2C data |
| دبوس 24 | RC5/SDO — Digital I/O RC5 / SPI data out |
| دبوس 25 | RC6/TX/CK — Digital I/O RC6 / USART TX / USART clock |
| دبوس 26 | RC7/RX/DT — Digital I/O RC7 / USART RX / USART data |
| دبوس 27 | RE0/RD/AN5 — Digital I/O RE0 / PSP read / Analog input AN5 |
| دبوس 28 | RE1/WR/AN6 — Digital I/O RE1 / PSP write / Analog input AN6 |
| دبوس 29 | RE2/CS/AN7 — Digital I/O RE2 / PSP chip select / Analog input AN7 |
| دبوس 30 | VDD — Positive supply (3.3V or 5V) |
| دبوس 31 | VSS — Ground |
| دبوس 32 | RD0/PSP0/C1OUT — Digital I/O RD0 / PSP data bit 0 / Comparator 1 output |
| دبوس 33 | RD1/PSP1/C2OUT — Digital I/O RD1 / PSP data bit 1 / Comparator 2 output |
| دبوس 34 | RD2/PSP2 — Digital I/O RD2 / PSP data bit 2 |
| دبوس 35 | RD3/PSP3 — Digital I/O RD3 / PSP data bit 3 |
| دبوس 36 | RD4/PSP4/ECCP1/P1A — Digital I/O RD4 / PSP data bit 4 / ECCP1 output / PWM P1A |
| دبوس 37 | RD5/PSP5/P1B — Digital I/O RD5 / PSP data bit 5 / PWM P1B |
| دبوس 38 | RD6/PSP6/P1C — Digital I/O RD6 / PSP data bit 6 / PWM P1C |
| دبوس 39 | RD7/PSP7/P1D — Digital I/O RD7 / PSP data bit 7 / PWM P1D |
| دبوس 40 | AVDD — Analog positive supply |
| دبوس 41 | AVSS — Analog ground |
| دبوس 42 | MCLR/VPP/RE3 — Master clear reset / Programming voltage / Digital I/O RE3 |
| دبوس 43 | VDD — Positive supply (3.3V or 5V) |
| دبوس 44 | VSS — Ground |
التطبيقات النموذجية
PIC18LF4680T-I/PT مناسب لـ 6 التطبيقs: Industrial CAN Sensor Hubs, Automotive Body Control Modules, Building Automation Gateways, Portable Battery-Powered Telemetry Nodes, Medical Device Control Boards, Industrial Motor Control.
Industrial CAN Sensor Hubs
The PIC18LF4680T-I/PT's integrated Enhanced CAN module with hardware acceptance filters makes it a strong fit for industrial sensor hubs where 8-bit cost, 2.0-5.5V operation, and proven determinism are required. The 64KB Flash comfortably holds 32K instructions of CANopen or DeviceNet stack plus application code. Placed on the 5V industrial bus with an MCP2551 CAN transceiver and 120 ohm termination at each end, the MCU handles bus arbitration in hardware while the CPU runs control loops. nanoWatt sleep drops quiescent current below 100 nA, ideal for 24V-powered but duty-cycled nodes. Compared to bit-banged CAN on smaller PICs, the ECAN module frees the CPU for sensor sampling on 11 ADC channels.
موصى به
Automotive Body Control Modules
The PIC18LF4680T-I/PT is used in body and chassis control modules for CAN-based networks with operating temperature -40C to +85C across the full 2.0-5.5V supply range, suiting 12V automotive rails after pre-regulation. Its 3.25KB RAM handles CAN receive buffers and CCP PWM timing for lighting or seat-control actuators, while 1KB EEPROM stores configurable vehicle parameters. The ECCP module provides hardware PWM dead-band control for motor drivers, eliminating the jitter from software PWM. Industrial 'I' grade fits cabin modules, while 'E' grade variants like PIC18F4680-E/PT target under-hood environments with +125C.
موصى به
Building Automation Gateways
Building automation gateways benefit from the PIC18LF4680T-I/PT's combination of ECAN for floor-level sensor data communication, USART for Modbus RTU over RS-485, and MSSP for I2C sensor hubs. The 10-bit ADC with 11 channels can directly read temperature, humidity, and airflow sensors without external analog front ends. Industrial-grade operation from -40C to +85C handles unheated mechanical rooms and rooftop enclosures. nanoWatt run/idle/sleep modes drop the gateway quiescent current to under 1 uA in idle, important for low-power harvested-power designs.
موصى به
Portable Battery-Powered Telemetry Nodes
The PIC18LF4680T-I/PT runs directly from a single 3.3V Li-ion or two AA cells thanks to its 2.0V minimum supply, removing the need for an additional boost regulator. nanoWatt idle and sleep modes combined with on-the-fly clock switching let a duty-cycled telemetry node consume under 1 uA between transmissions, extending battery life for remote installations. The 1KB EEPROM stores calibration constants across power cycles, while the 10-bit ADC with 11 channels monitors battery voltage, temperature, and sensor inputs. Compared to 5V-only PIC18F4680, the LF variant enables compact battery-powered CAN nodes.
موصى به
Medical Device Control Boards
Medical device control boards such as infusion pumps, blood-pressure monitors, and small benchtop analyzers use the PIC18LF4680T-I/PT for its deterministic PIC18 core, 5.5V-tolerant I/O for legacy analog front ends, and reliability of nanoWatt Technology. The 64KB Flash is ample for RTOS-lite scheduling of motor control via the ECCP module, sensor reads over the 11-channel 10-bit ADC, and operator UI on a character LCD over I2C or SPI. Industrial -40C to +85C operation handles most medical environments without requiring automotive-temperature E-grade parts.
موصى به
Industrial Motor Control
The PIC18LF4680T-I/PT's ECCP module generates hardware PWM with programmable dead-band control and 4 output channels, ideal for BLDC and 3-phase motor drives. Up to 25 MHz PWM frequency from the 40 MHz system clock handles 20 kHz switching above the audible range with tight regulation. The 10-bit ADC on 11 channels can sample motor phase currents via current-sense amplifiers, while the ECAN module reports back to the central controller. Compared to software PWM on smaller PICs, the ECCP module provides jitter-free switching, critical for low-noise motor operation.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18LF4680T-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F4680-I/PT | PIC18F4685-I/PT | PIC18LF4580-I/PT | PIC18LF4585-I/PT | PIC18LF4480-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-44 | TQFP-44 (same) | TQFP-44 (same) | TQFP-44 (same) | TQFP-44 (same) | TQFP-44 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 96 KB | 32 KB | 48 KB | 16 KB |
| Operating Voltage | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| CAN Peripheral | ECAN | ECAN | ECAN | ECAN | ECAN | None |
| Data RAM | 3.25 KB | 3.25 KB | 3.25 KB | 2 KB | 3.25 KB | 768 B |
| Data EEPROM | 1 KB | 1 KB | 1 KB | 256 B | 1 KB | None |
| ADC Channels | 11 x 10-bit | 11 x 10-bit | 11 x 10-bit | 8 x 10-bit | 11 x 10-bit | 11 x 10-bit |
| Industrial Grade (-40C to +85C) | Yes | Yes | Yes | Yes | Yes | Yes |
أبرز الفروقات
- Wide 2.0V to 5.5V supply range, broadest in the PIC18F4680 family (مقابلPIC18F4680-I/PT)
- 64KB Flash balances code space and die cost (مقابلPIC18LF4585-I/PT)
- Integrated Enhanced CAN module with hardware filters (مقابلPIC18LF4480-I/PT)
ملاحظات التصميم
Place a 100 nF decoupling capacitor within 4 mm of every VDD/AVDD pin and a 10 uF bulk capacitor near the MCU's main VDD pin. The PIC18LF4680T-I/PT has three VDD and three VSS pins on TQFP-44; if any pair is left undecoupled the ECAN module may glitch during bus arbitration, producing sporadic CAN error frames. Use a ferrite bead or small inductor between digital VDD and analog AVDD if switching noise on the digital rail exceeds 50 mVpk.
Do not exceed 5.5 V absolute maximum on any I/O pin, even when the MCU is in 3.3V mode. The CAN bus transceivers (e.g., MCP2551) may pass 5 V bus-side transients to the CANTX/CANRX pins during short-to-battery events; if your system is automotive, add TVS diodes or series resistors on the CAN lines. Always configure the CONFIG3H register's CANMX bit correctly so CANTX maps to RB2 and CANRX maps to RB3 - the alternate mapping on CANTX/CANRX (RC6/RC7) collides with the USART default pins.
The TQFP-44 package has a junction-to-ambient thermal resistance of approximately 45 C/W; at full 40 MHz operation across -40C to +85C, the silicon will dissipate up to 250 mW under typical load. In enclosed industrial enclosures, derate to 20 MHz or add thermal copper pours under the exposed pad. The 'I' industrial grade is rated for +85C ambient; do not substitute 'E' (extended, +125C) if the design is purely industrial - the E-grade costs more without need.
معلومات الامتثال
RoHS compliant per Microchip product page. Industrial -40C to +85C operating range (I grade); AEC-Q100 automotive qualification is not applicable to the I-grade variant - choose the PIC18F4680-E/PT for AEC-Q100 automotive designs.
