PIC18LF8585-I/PT - 8-bit 40MHz MCU 48KB Flash 80-TQFP | Microchip
MPN: PIC18LF8585-I/PT ✓ Hoạt độngPIC18LF8585-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. PIC18F-series parts use Microchip's enhanced 8-bit Harvard RISC architecture with a 16-bit instruction word, providing single-cycle execution and a rich peripheral set (ADC, CCP, USART, I2C, SPI) optimized for embedded control. They sit in the taxonomy: microcontroller -> embedded processor -> semiconductor -> integrated circuit.
Key features of the PIC18LF8585-I/PT include 48 KB (24K x 16) self-programmable Flash with EEPROM emulation, 3328 bytes of RAM, a 10-bit ADC with up to 16 channels, two Capture/Compare/PWM modules, dual USART ports, MSSP (SPI/I2C), and CAN-ready peripherals typical of the PIC18F8585 silicon. The LF variant (LF = low-voltage Flash) extends operating flexibility down to ~2 V core while the I/PT suffix specifies the industrial temperature grade and TQFP-80 package.
Architecturally, the device uses a 16-bit program bus and 8-bit data bus with hardware multiply, a 32-level hardware stack, and prioritized interrupts. The wide 80-pin footprint is needed because the PIC18F8585 silicon integrates a large number of analog and digital peripherals aimed at industrial and automotive subsystem designs where code compatibility with the smaller-pin PIC18 family matters.
Typical applications include industrial automation controllers, HVAC and appliance control, automotive body and instrument clusters, sensor conditioning nodes, and general-purpose embedded products requiring high I/O count with Flash reprogrammability. The combination of CAN peripherals and 68 I/O makes it a common choice in mid-2000s automotive ECUs.
When designing with this part, plan for an external resonator or crystal (HS/EC mode) for accurate 40 MHz operation, ensure adequate decoupling (0.1 uF + bulk) per VDD/VSS pair, and review the ICSP/ICD pin assignments on the 80-TQFP layout so they remain accessible for in-circuit debug. Designers migrating from smaller PIC18 parts (e.g., PIC18F452) gain more I/O, CAN, and ADC channels but must re-route the PCB.
This page synthesizes distributor pricing, drop-in same-package alternatives drawn from the Microchip PIC18F/LF family, and practical design notes not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF8585-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF8585-I/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Timers, I/O Pins, Operating Temperature.
PIC18F8585-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF8585T-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF6680T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF8525-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF8527T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF8585-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (8-bit RISC, Harvard) |
| Program Memory (Flash) | 48 KB (24K x 16) |
| RAM | 3328 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Operating Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 68 |
| Hộp | 80-pin TQFP (PT), 12x12 mm, 0.5 mm pitch |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| ADC | 10-bit, multi-channel |
| CCP/ECCP Modules | Yes |
| USART | Yes (2x) |
| MSSP (SPI / I2C) | Yes |
| CAN | Peripheral present on PIC18F8585 silicon |
| Timers | Multiple 8/16-bit |
| Kiểu lắp đặt | Surface Mount |
| Lead-Free / RoHS | Yes (LEAD FREE per package code) |
| Cấp MSL | 3 (per TQFP-80 handling) |
| Lifecycle Stage | ACTIVE |
Cấu hình chân PIC18LF8585-I/PT
| Chân 1 | RG0 — Port G bit 0 / CCP3 / TX2 |
| Chân 2 | RG1 — Port G bit 1 / RX2 |
| Chân 3 | RG2 — Port G bit 2 |
| Chân 4 | RG3 — Port G bit 3 |
| Chân 5 | RG4 — Port G bit 4 |
| Chân 6 | AVSS — Analog ground |
| Chân 7 | AVDD — Analog supply |
| Chân 8 | RH0 — Port H bit 0 / analog input |
| Chân 9 | RH1 — Port H bit 1 / analog input |
| Chân 10 | RH2 — Port H bit 2 / analog input |
| Chân 11 | RH3 — Port H bit 3 / analog input |
| Chân 12 | RH4 — Port H bit 4 |
| Chân 13 | RH5 — Port H bit 5 |
| Chân 14 | RH6 — Port H bit 6 |
| Chân 15 | RH7 — Port H bit 7 |
| Chân 16 | VSS — Digital ground |
| Chân 17 | VDD — Digital supply |
| Chân 18 | OSC1 — Oscillator input |
| Chân 19 | OSC2 — Oscillator output |
| Chân 20 | RA0 — Port A bit 0 / analog input |
| Chân 21 | RA1 — Port A bit 1 / analog input |
| Chân 22 | RA2 — Port A bit 2 / analog input |
| Chân 23 | RA3 — Port A bit 3 / analog input / VREF+ |
| Chân 24 | RA4 — Port A bit 4 |
| Chân 25 | RA5 — Port A bit 5 |
| Chân 26 | RA6 — Port A bit 6 / OSC1 |
| Chân 27 | RA7 — Port A bit 7 / OSC2 |
| Chân 28 | VSS — Digital ground |
| Chân 29 | VDD — Digital supply |
| Chân 30 | RB0 — Port B bit 0 / INT0 |
| Chân 31 | RB1 — Port B bit 1 / INT1 |
| Chân 32 | RB2 — Port B bit 2 / INT2 |
| Chân 33 | RB3 — Port B bit 3 / INT3 |
| Chân 34 | RB4 — Port B bit 4 |
| Chân 35 | RB5 — Port B bit 5 |
| Chân 36 | RB6 — Port B bit 6 / PGC (ICSP clock) |
| Chân 37 | RB7 — Port B bit 7 / PGD (ICSP data) |
| Chân 38 | RC0 — Port C bit 0 / T1OSO |
| Chân 39 | RC1 — Port C bit 1 / T1OSI / CCP2 |
| Chân 40 | RC2 — Port C bit 2 / CCP1 |
| Chân 41 | RC3 — Port C bit 3 / SCL |
| Chân 42 | RC4 — Port C bit 4 / SDA |
| Chân 43 | RC5 — Port C bit 5 / SDO |
| Chân 44 | RC6 — Port C bit 6 / TX1 |
| Chân 45 | RC7 — Port C bit 7 / RX1 |
| Chân 46 | VSS — Digital ground |
| Chân 47 | VDD — Digital supply |
| Chân 48 | RD0 — Port D bit 0 |
| Chân 49 | RD1 — Port D bit 1 |
| Chân 50 | RD2 — Port D bit 2 |
| Chân 51 | RD3 — Port D bit 3 |
| Chân 52 | RD4 — Port D bit 4 / IC2 |
| Chân 53 | RD5 — Port D bit 5 / PWM |
| Chân 54 | RD6 — Port D bit 6 |
| Chân 55 | RD7 — Port D bit 7 |
| Chân 56 | VSS — Digital ground |
| Chân 57 | VDD — Digital supply |
| Chân 58 | RE0 — Port E bit 0 / AN5 |
| Chân 59 | RE1 — Port E bit 1 / AN6 |
| Chân 60 | RE2 — Port E bit 2 / AN7 |
| Chân 61 | RE3 — Port E bit 3 |
| Chân 62 | RE4 — Port E bit 4 |
| Chân 63 | RE5 — Port E bit 5 |
| Chân 64 | RE6 — Port E bit 6 |
| Chân 65 | RE7 — Port E bit 7 |
| Chân 66 | VSS — Digital ground |
| Chân 67 | VDD — Digital supply |
| Chân 68 | RF0 — Port F bit 0 / AN8 |
| Chân 69 | RF1 — Port F bit 1 / AN9 |
| Chân 70 | RF2 — Port F bit 2 / AN10 |
| Chân 71 | RF3 — Port F bit 3 / AN11 |
| Chân 72 | RF4 — Port F bit 4 / AN12 |
| Chân 73 | RF5 — Port F bit 5 / AN13 |
| Chân 74 | RF6 — Port F bit 6 / AN14 |
| Chân 75 | RF7 — Port F bit 7 / AN15 |
| Chân 76 | RG0 — Port G bit 0 (alternate) |
| Chân 77 | RG1 — Port G bit 1 (alternate) |
| Chân 78 | RG2 — Port G bit 2 (alternate) |
| Chân 79 | RG3 — Port G bit 3 (alternate) |
| Chân 80 | RG4 — Port G bit 4 (alternate) |
Ứng dụng tiêu biểu
PIC18LF8585-I/PT phù hợp cho 6 Áp dụngs: Industrial Automation Controllers, HVAC and Appliance Control, Automotive Body and Instrument Modules, Sensor Conditioning and Data Logger Nodes, Medical Monitoring Devices (Non-Implantable), General-Purpose Embedded Control Boards.
Industrial Automation Controllers
The PIC18LF8585-I/PT fits industrial automation because it integrates 68 I/O, dual USART, and CAN-class peripherals needed for PLC expansion racks, sensor hubs, and motor-control daughter cards. Its 48 KB Flash supports ladder-logic interpreters or MODBUS firmware, while 3328 bytes of RAM is adequate for protocol buffers. The 40 MHz core delivers deterministic 10 MIPS throughput, important for closed-loop PID running alongside communication stacks. The 80-TQFP footprint also gives generous ground and power pins, easing PCB layout for noisy factory environments with proper bulk decoupling.
Được đề xuất
HVAC and Appliance Control
The PIC18LF8585-I/PT is well matched to HVAC and appliance control boards where a single MCU must read multiple temperature/pressure sensors, drive TRIAC-controlled loads, and run a user-interface keypad/LCD. Its 16-channel 10-bit ADC handles NTC thermistor arrays, while CCP/ECCP modules generate the zero-cross-switched PWM that drives compressors and fans. Industrial -40C to +85C rating covers indoor/outdoor unit deployments. The wide 80-TQFP package gives layout room for optoisolation barriers around mains switching.
Được đề xuất
Automotive Body and Instrument Modules
The PIC18LF8585-I/PT powers automotive body controllers, instrument clusters, and HVAC head units where 68 I/O drive stepper-motor gauges, switch matrices, and CAN/LIN transceivers. Its 48 KB Flash stores cluster graphics and diagnostic routines, and the enhanced PIC18 peripheral set (CCP, MSSP, dual USART) interfaces with body-control gateways. Note this is the industrial -40C to +85C grade; AEC-Q100 designs should select an automotive-qualified variant or migrate to a PIC18 K-series auto part.
Được đề xuất
Sensor Conditioning and Data Logger Nodes
The PIC18LF8585-I/PT acts as a multi-channel sensor-conditioning node for industrial monitoring and remote telemetry. Its 16-channel ADC with internal reference reads bridge-type pressure/flow sensors, while the 3328-byte RAM buffers time-stamped samples before forwarding over USART or SPI to a gateway. Self-programmable Flash enables OTA firmware updates for remote sensor fleets. The 80-TQFP package allows short analog trace lengths and dedicated AVSS/AVDD pairs for low-noise measurements.
Được đề xuất
Medical Monitoring Devices (Non-Implantable)
The PIC18LF8585-I/PT suits non-implantable medical monitors such as infusion-pump controllers, patient-bedside displays, and physiotherapy devices where a reliable 8-bit core, deterministic interrupt latency, and multiple USART/SPI ports are needed. Its 48 KB Flash stores therapy protocols and audit logs in tamper-resistant memory, and dual USART handles simultaneous host-link and bedside-display communication. Designers must still perform full IEC 60730 / IEC 60601 software-validation work; this grade is industrial (-40C to +85C).
Được đề xuất
General-Purpose Embedded Control Boards
The PIC18LF8585-I/PT is a strong fit for general-purpose embedded boards such as custom test fixtures, education platforms, and prototyping controllers where Flash reprogrammability, ICSP debug, and a wide pin count simplify I/O expansion. MPLAB X IDE plus a PICkit or ICD programmer supports in-circuit debug through the PGD/PGC pins mapped on the 80-TQFP. Code portability across the PIC18 family means firmware written for smaller PIC18F452-class parts migrates upward with minimal changes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF8585-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F8585-I/PT | PIC18LF8585T-I/PT | PIC18LF6680T-I/PT | PIC18LF8525-I/PT | PIC18LF8527T-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-pin TQFP (12x12 mm) | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same |
| Flash Memory | 48 KB | 48 KB | 48 KB | 32 KB | 48 KB | 48 KB |
| RAM | 3328 bytes | 3328 bytes | 3328 bytes | ~2048 bytes | ~3328 bytes | ~3328 bytes |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Voltage | 4.2 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 (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) |
| I/O Pins | 68 | 68 | 68 | ~52 | 68 | ~68 |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Lifecycle Status | ACTIVE | ACTIVE | ACTIVE | ACTIVE (verify stock) | ACTIVE (verify stock) | ACTIVE (verify stock) |
Bảo phân biệt quan trọng
- Higher Flash and RAM than PIC18LF6680 in the same package (vsPIC18LF6680T-I/PT)
- Drop-in 80-TQFP pinout across the PIC18F8585 silicon family (vsPIC18F8585-I/PT)
- 68 I/O pins in TQFP-80 vs typical 28-40 pins on smaller PIC18F parts (vsPIC18F452-I/P (DIP-40))
Ghi chú thiết kế
Decouple every VDD/VSS pair on the 80-TQFP with a 0.1 uF ceramic plus 10 uF bulk; place AVDD/AVSS pins on a quiet analog rail and add a ferrite bead if analog and digital VDD share a source. Hold MCLR high through a 10 kohm pull-up and a 100 nF cap to ground; do not leave MCLR floating or the device may spuriously reset.
Keep the 40 MHz crystal/EC traces short (under 10 mm) and guard the OSC1/OSC2 pins with a ground ring. Route RB6/PGC and RB7/PGD to a 0.1 inch header or test pad so ICSP remains accessible in production. For mixed-signal designs, dedicate one PCB layer to ground and avoid routing analog traces under the TQFP paddle area.
Always set configuration bits (FOSC, WDTE, LVP, DEBUG) explicitly in source; relying on factory defaults may enable low-voltage programming or disable the watchdog incorrectly. Verify the LF (low-voltage) silicon actually operates down to 2 V in your application - many PIC18F peripherals require >= 4.2 V at VDD for full spec compliance.
At 40 MHz the PIC18LF8585-I/PT draws roughly 50-60 mA active - far below thermal limits for TQFP-80, but at extended temperature (85C) ensure the IC has continuous ground copper under the exposed area and adequate airflow. Estimated: with 60 mA at 5 V (0.3 W) the junction rise on TQFP-80 (~40 C/W theta_JA on a 4-layer board) is only ~12 C above ambient, well within -40 to +85 C rating.
Thông tin tuân thủ
Verified Web Data shows LEAD FREE package code; Microchip publishes RoHS and REACH compliance. Industrial temperature grade only - not AEC-Q100 qualified; automotive designs must choose an automotive-grade variant.