PIC18F4585-E/ML - 8-bit 25MHz 48KB Flash MCU w/ECAN | Microchip
MPN: PIC18F4585-E/ML ✓ نشطPIC18F4585-E/ML نظرة عامة
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip that integrates a CPU, non-volatile program memory (Flash/ROM), volatile working memory (RAM), peripherals, and I/O on a single die. The PIC18F family sits in the hierarchy: 8-bit microcontroller -> microcontroller -> embedded controller -> semiconductor IC. ECAN is an enhanced implementation of the Bosch CAN 2.0B protocol with multiple mailboxes, filters, and masks for automotive and industrial networking.
Key features of the PIC18F4585-E/ML include a 10-bit ADC with up to 13 input channels, multiple timers, an Enhanced USART, MSSP (SPI/I2C), and the nanoWatt power-management feature set with idle, sleep, and run modes. The device also offers self-programmability, an ICD/ICSP debug interface, and a 10 MIPS instruction throughput at 40 MHz oscillator (with 4x PLL).
Architecturally, the PIC18F4585 uses Microchip's Harvard RISC core with separate program and data buses, a 16-bit instruction word, and hardware multiply. The ECAN engine offloads bus arbitration and message filtering from the CPU, leaving significant bandwidth for application logic, sensor acquisition, or motor control loops.
Typical applications include automotive body and chassis ECAN nodes, industrial CAN-based sensor networks, HVAC controllers, building automation gateways, and general-purpose embedded control with CAN connectivity. The wide operating voltage range and extended temperature grade also suit battery-management and heavy-industrial equipment.
When designing with this part, ensure the QFN exposed pad is soldered to a sufficient copper pour to keep junction rise within limits, place decoupling capacitors within 3 mm of each power pin, and validate ECAN bus termination (120 ohm) at each network end. The /ML suffix indicates the 44-pin QFN (8x8 mm) package.
This page synthesizes distributor pricing, same-brand drop-in alternatives from Microchip's PIC18F family, and practical design notes not found in the manufacturer datasheet.
بدائل مباشرة لـ PIC18F4585-E/ML — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18F4585-E/ML (نفس عامل الشكل والبصمة) — يختلف في Package, Operating Temperature, Program Memory (Flash), ADC, MSL Level.
PIC18F4585-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4585T-E/ML
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F4580-I/ML
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F4480-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4680-I/ML
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4550-I/ML
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18F4585-E/ML الحدود القصوى والخصائص الكهربائية
| Core | PIC18F, 8-bit Harvard RISC |
| Program Memory (Flash) | 48 KB (24K x 16) |
| RAM | 3,328 bytes |
| Maximum CPU Speed | 25 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| درجة حرارة التشغيل | -40 C to +125 C (Extended, -E suffix) |
| العلبة | 44-pin QFN (8x8 mm) with exposed pad |
| نوع التركيب | Surface Mount |
| ADC | 10-bit, up to 13 channels |
| Communication | ECAN, Enhanced USART, MSSP (SPI/I2C) |
| CAN | ECAN 2.0B (Enhanced Controller Area Network) |
| Power-Saving Modes | nanoWatt (idle, sleep, run modes) |
| Debug / Programming | ICSP / ICD |
| حالة RoHS | Compliant |
تكوين أطراف PIC18F4585-E/ML
| دبوس 1 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| دبوس 2 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| دبوس 3 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| دبوس 4 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| دبوس 5 | RA4 — PORTA bit 4 |
| دبوس 6 | RA5 — PORTA bit 5 |
| دبوس 7 | RA6 — PORTA bit 6 |
| دبوس 8 | RA7 — PORTA bit 7 |
| دبوس 9 | VSS — Ground reference |
| دبوس 10 | VDD — Positive supply (2.0 V to 5.5 V) |
| دبوس 11 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| دبوس 12 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| دبوس 13 | RB2 — PORTB bit 2 |
| دبوس 14 | RB3 — PORTB bit 3 |
| دبوس 15 | RB4 — PORTB bit 4 |
| دبوس 16 | RB5 — PORTB bit 5 |
| دبوس 17 | RB6/PGC — PORTB bit 6 / ICSP clock |
| دبوس 18 | RB7/PGD — PORTB bit 7 / ICSP data |
| دبوس 19 | VSS — Ground reference |
| دبوس 20 | VDD — Positive supply (2.0 V to 5.5 V) |
| دبوس 21 | RC0 — PORTC bit 0 |
| دبوس 22 | RC1 — PORTC bit 1 |
| دبوس 23 | RC2 — PORTC bit 2 |
| دبوس 24 | RC3 — PORTC bit 3 |
| دبوس 25 | RC4 — PORTC bit 4 |
| دبوس 26 | RC5 — PORTC bit 5 |
| دبوس 27 | RC6 — PORTC bit 6 |
| دبوس 28 | RC7 — PORTC bit 7 |
| دبوس 29 | RE0/RD — PORTE bit 0 / parallel slave port read |
| دبوس 30 | RE1/WR — PORTE bit 1 / parallel slave port write |
| دبوس 31 | RE2/CS — PORTE bit 2 / parallel slave port chip select |
| دبوس 32 | VDD — Positive supply (2.0 V to 5.5 V) |
| دبوس 33 | VSS — Ground reference |
| دبوس 34 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock |
| دبوس 35 | OSC2/CLKO/RA6 — Crystal oscillator output |
| دبوس 36 | MCLR — Master clear (reset) input |
| دبوس 37 | C1OUT — Comparator 1 output |
| دبوس 38 | C2OUT — Comparator 2 output |
| دبوس 39 | P1A/ECCP1 — Enhanced CCP1 PWM output / P1A |
| دبوس 40 | P1B — Enhanced PWM P1B output |
| دبوس 41 | P1C — Enhanced PWM P1C output |
| دبوس 42 | P1D — Enhanced PWM P1D output |
| دبوس 43 | NC — Not connected (per datasheet) |
| دبوس 44 | EP — Exposed thermal pad (connect to VSS) |
التطبيقات النموذجية
PIC18F4585-E/ML مناسب لـ 6 التطبيقs: Automotive Body ECAN Node, Industrial CAN-Based Sensor Hub, HVAC Climate Controller, Building Automation Gateway, Battery Management Module, General-Purpose CAN Node with USB Debug.
Automotive Body ECAN Node
The PIC18F4585-E/ML is well suited as a body-control ECAN node because its integrated ECAN 2.0B engine offloads bus arbitration from the CPU and its -40C to +125C extended temperature grade meets automotive under-hood and cabin requirements. With 48 KB Flash it can host a CANopen or J1939 lightweight stack alongside application firmware, while the 10-bit ADC with up to 13 channels reads multiple analog sensors (temperature, lighting, position) without external muxes. Place the MCU near the bus with a 120 ohm termination resistor at each network end and isolate the bus with a CAN transceiver such as the MCP2551.
موصى به
Industrial CAN-Based Sensor Hub
In a CAN-based industrial sensor hub the PIC18F4585-E/ML aggregates analog and digital sensor data and publishes it over ECAN. Its 25 MHz / 10 MIPS core easily handles periodic 100 ms sensor reads plus CAN message composition. The MSSP peripheral supports I2C or SPI sensors, and the Enhanced USART enables RS-485 fallback for legacy equipment. NanoWatt sleep modes allow battery-powered field nodes to sleep below 1 uA between transmissions, extending service intervals for remote installations.
موصى به
HVAC Climate Controller
HVAC climate controllers benefit from the PIC18F4585-E/ML's mix of analog and digital peripherals. The 10-bit ADC samples thermistor temperature inputs, the Enhanced PWM channels drive fan or damper actuators, and ECAN connects the unit to a building automation bus. The 3,328 bytes of RAM is sufficient for short PID control loops and a small BACnet/CANopen message buffer. Low-voltage operation down to 2.0 V supports 24 V industrial supply rails through a simple linear regulator.
موصى به
Building Automation Gateway
A building automation gateway using the PIC18F4585-E/ML can bridge ECAN to other field buses via the Enhanced USART (Modbus RTU over RS-485) or MSSP (I2C sensor expansion). With 48 KB Flash the gateway can host a small protocol translation table, scheduling logic, and diagnostics. The exposed pad QFN package and wide temperature range allow installation in unconditioned electrical rooms.
موصى به
Battery Management Module
In a battery management module the PIC18F4585-E/ML measures individual cell voltages via the 10-bit ADC, controls balancing MOSFETs via PWM, and reports state-of-charge over ECAN to a master charger controller. Operating down to 2.0 V allows operation directly from a single Li-ion cell during deep discharge, and nanoWatt sleep modes minimize quiescent draw when the pack is idle.
موصى به
General-Purpose CAN Node with USB Debug
Designers prototyping a CAN node benefit from the PIC18F4585-E/ML's ICSP/ICD debug interface for in-circuit debugging, plus the ECAN peripheral for bus communication. The same QFN footprint is shared with PIC18F4550-I/ML which adds USB, enabling an upgrade path to USB-CAN bridge hardware without PCB changes. This simplifies NPI and field firmware updates across a product family.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18F4585-E/ML — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F4585-I/ML | PIC18F4580-I/ML | PIC18F4680-I/ML | PIC18F4550-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin QFN (8x8) | 44-pin QFN (8x8) - same | 44-pin QFN (8x8) - same | 44-pin QFN (8x8) - same | 44-pin QFN (8x8) - same |
| Flash Memory | 48 KB | 48 KB | 32 KB | 64 KB | 32 KB |
| RAM | 3,328 bytes | 3,328 bytes | 3,328 bytes | 3,328 bytes | 2,048 bytes |
| CAN | ECAN 2.0B | ECAN 2.0B | ECAN 2.0B | ECAN 2.0B | ECAN 2.0B + USB 2.0 FS |
| CPU Speed | 25 MHz / 10 MIPS | 25 MHz / 10 MIPS | 25 MHz / 10 MIPS | 25 MHz / 10 MIPS | 48 MHz / 12 MIPS |
| Temperature Grade | Extended -40C to +125C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
أبرز الفروقات
- Extended temperature grade with ECAN on the same die (مقابلPIC18F4585-I/ML)
- More Flash headroom than PIC18F4580 in the same QFN footprint (مقابلPIC18F4580-I/ML)
- Industrial focus without USB overhead (مقابلPIC18F4550-I/ML)
ملاحظات التصميم
Decouple each VDD/VSS pair with a 100 nF ceramic placed within 3 mm of the pin. For the 44-pin QFN, place a bulk 10 uF tantalum or ceramic at the board supply entry. Hold VDD between 2.0 V and 5.5 V; during Flash programming stay within the datasheet-specified VDD range and avoid brown-out events that may corrupt the write cycle.
Estimated: at 25 MHz with all peripherals active at 5 V, the PIC18F4585-E/ML dissipates roughly 50-75 mW. The 44-pin QFN exposed pad reduces theta_JA significantly when soldered to a copper pour; stitch multiple thermal vias under the pad to the inner ground plane. Without the exposed-pad solder connection, junction temperature will rise well above ambient under heavy I/O toggling.
Route the ECAN CANTX/CANRX traces as a differential pair with 120 ohm characteristic impedance, keep stubs short, and place the MCP2551 transceiver within 25 mm of the MCU. Series-terminate each end of the bus with 120 ohm. Keep oscillator traces short and guard the crystal with a ground ring to minimize EMI that can couple into the CAN bus.
Do not leave the MCLR pin floating; tie it through a 10 kohm pull-up to VDD or use the internal weak pull-up with a defined reset strategy. Never apply voltage to any pin before VDD ramps up or you may latch-up the I/O. When migrating from the industrial-grade (I) variant to the extended (E) variant, revalidate timing at the new temperature corners.
معلومات الامتثال
RoHS and lead-free per Microchip product page. The -E extended temperature grade supports automotive environments, but PIC18F4585-E/ML is not explicitly AEC-Q100 qualified; AEC-Q100-qualified members of the family are listed separately by Microchip.
