PIC18LF2585-I/SP - 8-bit 40MHz 48KB Flash MCU w/ECAN | Microchip
MPN: PIC18LF2585-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.21 | $8.21 |
| 10 | $7.39 | $73.90 |
| 100 | $6.57 | $657.00 |
| 500 | $5.85 | $2,925.00 |
| 1,000 | $5.21 | $5,210.00 |
PIC18LF2585-I/SP Overview
An 8-bit microcontroller (MCU) is a programmable integrated circuit that executes instructions from on-chip memory using an 8-bit data path. PIC microcontrollers belong to the microcontroller hierarchy as a RISC-based embedded controller, sitting between simple 8-bit MCUs (e.g., 8051) and 32-bit ARM Cortex-M devices in performance and complexity. The PIC18F family adds an enhanced 16-bit instruction set with 8-bit data path, Harvard architecture, and rich peripheral integration (ECAN, ADC, PWM, USART) typically found in higher-tier parts.
Key features of the PIC18LF2585-I/SP include: 48KB (24K x 16) self-programmable Flash program memory, 3328 bytes of data RAM, 256 bytes of EEPROM, an integrated ECAN module compliant with CAN 2.0B active, a 10-bit A/D converter with up to 8 channels, 34 digital I/O pins, nanoWatt power management for low-power sleep modes, and an industrial temperature range of -40C to +85C. The 28-SPDIP package provides a robust through-hole footprint suitable for industrial environments.
Architecturally, the PIC18LF2585 leverages Microchip's enhanced Harvard architecture with separate program and data buses, supporting linear addressing of up to 2MB of program memory. The integrated ECAN controller hardware handles message filtering, acceptance masks, and prioritized message handling in hardware, offloading CPU work and enabling deterministic CAN bus performance critical for automotive and industrial networking applications.
Typical applications include industrial CAN bus nodes, automotive body and chassis ECUs, sensor interface boards, motor control peripherals, building automation gateways, and embedded industrial control systems. The combination of large Flash and rich communication peripherals makes it a versatile workhorse for CAN-enabled industrial designs.
When designing with this part, ensure proper decoupling of VDD/AVDD with 100nF ceramic capacitors and bulk capacitance on the analog supply. The 28-SPDIP footprint simplifies prototyping but consumes more PCB area than QFN alternatives; choose QFN-packaged siblings for volume production. Always include the MCLR pull-up and ICSP programming header for in-circuit debugging.
Drop-in alternatives for PIC18LF2585-I/SP — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18LF2585-I/SP (same form factor and footprint) — differing in Core Architecture, Family, Mounting Type, Package, Power-Saving Modes.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F2585-I/SP
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View Datasheet →PIC18LF2585-I/SP Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC, Harvard) |
| Family | PIC18F |
| CPU | PIC18 CPU |
| Program Memory | 48 KB (24K x 16) Flash |
| Data RAM | 3328 bytes |
| EEPROM | 256 bytes |
| Max Clock Speed | 40 MHz |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 34 |
| A/D Converter | 10-bit, up to 8 channels |
| CAN Peripheral | ECAN (CAN 2.0B active) |
| Package | 28-pin SPDIP (Plastic DIP, through-hole) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Power-Saving Modes | nanoWatt |
| ROM Type | Flash (self-programmable) |
| RoHS Status | Compliant |
PIC18LF2585-I/SP Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Pin 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI slave select |
| Pin 8 | OSC2/RA6 — Oscillator output / Port A bit 6 |
| Pin 9 | OSC1/RA7 — Oscillator input / Port A bit 7 |
| Pin 10 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 11 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 |
| Pin 12 | RC2/CCP1 — Port C bit 2 / CCP1 |
| Pin 13 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 15 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 16 | RC6/TX/CK — Port C bit 6 / USART TX / clock |
| Pin 17 | RC7/RX/DT — Port C bit 7 / USART RX / data |
| Pin 18 | CANTX — ECAN transmit output |
| Pin 19 | CANRX — ECAN receive input |
| Pin 20 | GND — Ground reference |
| Pin 21 | VDD — Positive supply voltage (4.2V-5.5V) |
| Pin 22 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| Pin 23 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Pin 24 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| Pin 25 | RB3/CCP2 — Port B bit 3 / CCP2 (alternate) |
| Pin 26 | RB4 — Port B bit 4 |
| Pin 27 | RB5/PGM — Port B bit 5 / LVP programming |
| Pin 28 | RB6/PGC — Port B bit 6 / ICSP clock |
Typical Applications
PIC18LF2585-I/SP is suitable for 6 applications: Industrial CAN Bus Node, Automotive Body and Chassis ECU, Sensor Interface Board, Building Automation Gateway, Single-Phase Motor Control Peripheral, Embedded Industrial Control Module.
Industrial CAN Bus Node
The PIC18LF2585-I/SP's integrated ECAN peripheral supporting CAN 2.0B active makes it an excellent choice for industrial CAN bus nodes. The ECAN hardware handles acceptance filtering and prioritized message buffering, offloading the 8-bit CPU from protocol overhead and delivering deterministic bus latency at 1 Mbps. With 48 KB Flash the MCU has ample headroom for a CANopen or DeviceNet stack, while 3328 bytes of RAM fits typical PDO/SDO buffer needs. The 40 MHz clock yields 10 MIPS of throughput, sufficient for 1 kHz control loops and CAN message handling simultaneously.
Recommended
Automotive Body and Chassis ECU
The PIC18LF2585-I/SP suits automotive body and chassis ECUs that require CAN connectivity, 10-bit ADC for sensor reading, and reliable industrial temperature operation from -40C to +85C. Its 28-SPDIP through-hole package withstands vibration in chassis-mounted enclosures and accepts conformal coating. The 34 I/O pins accommodate multiple sensor inputs, PWM-driven loads, and LIN/CAN interfaces. With 48 KB Flash the ECU supports bootloader functionality, while nanoWatt power-saving modes preserve quiescent current in quiescent body modules that wake on CAN traffic.
Recommended
Sensor Interface Board
With its 10-bit A/D converter supporting up to 8 input channels, the PIC18LF2585-I/SP is well-matched to multi-sensor interface boards in industrial and HVAC systems. The 8 ADC channels read temperature, pressure, flow, and level sensors, while the 34 digital I/O pins drive relays, LEDs, and serial communication to upstream controllers. The 28-SPDIP package simplifies through-hole PCB assembly for prototype sensor nodes. 48 KB of Flash supports lookup-table calibration routines, and ECAN connectivity enables networked sensor arrays with deterministic bus access.
Recommended
Building Automation Gateway
The PIC18LF2585-I/SP fits building automation gateway nodes that bridge BACnet, Modbus, and CAN buses to higher-level controllers. The 48 KB Flash accommodates protocol translation libraries, while ECAN and the on-chip USART enable simultaneous bus interfaces. nanoWatt sleep modes reduce power in ceiling-mounted nodes that wake on a periodic schedule. The 40 MHz clock and 10 MIPS throughput handle Modbus RTU message processing without backlog, and the 28-SPDIP through-hole package simplifies field-serviceable modules and in-field firmware updates via ICSP.
Recommended
Single-Phase Motor Control Peripheral
The PIC18LF2585-I/SP is designed for single-phase induction motor control with on-chip PWM, ADC, and capture/compare peripherals. The 40 MHz clock drives PWM frequencies up to 20 kHz above the audible band, and the 10-bit ADC provides rotor position and current feedback through current-sense op-amps. 48 KB Flash supports sensorless control algorithms and FOC variants. The industrial -40C to +85C temperature range suits motor enclosures and outdoor HVAC. ECAN enables networked motor controllers reporting telemetry to a building automation system.
Recommended
Embedded Industrial Control Module
For non-CAN industrial control modules, the PIC18LF2585-I/SP offers 48 KB Flash, 3328B RAM, 34 I/O, and 10-bit ADC in a socketable 28-SPDIP package that simplifies field replacement. Its 40 MHz / 10 MIPS throughput supports PID loops, finite-state machines, and serial protocol parsing in programmable logic controllers (PLCs) and HMI panels. nanoWatt sleep modes reduce idle power in battery-backed installations, while 256 bytes EEPROM store calibration constants across power cycles. The industrial temperature grade supports outdoor and factory-floor deployment.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF2585-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F2585-I/SP | PIC18F4585-I/SP | PIC18LF4585-I/SP |
|---|---|---|---|---|
| Package | SPDIP-28 | SPDIP-28 (same) | DIP-40 (different) | DIP-40 (different) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 48 KB Flash | 48 KB Flash (same) | 48 KB Flash (same) | 48 KB Flash (same) |
| Data RAM | 3328 bytes | 3328 bytes (same) | 3328 bytes (same) | 3328 bytes (same) |
| ECAN Peripheral | Yes | Yes (same) | Yes (same) | Yes (same) |
| Pin Count | 28 | 28 (same) | 40 (different) | 40 (different) |
| A/D Converter | 10-bit, 8 channels | 10-bit, 8 channels (same) | 10-bit, 11 channels | 10-bit, 11 channels |
| I/O Pins | 34 | 34 (same) | 44 | 44 |
Key Differentiators
- Integrated ECAN peripheral with hardware filtering (vs PIC18LF2580-I/SP)
- Low-voltage Flash operation (LF prefix) (vs PIC18F2585-I/SP (non-LF))
- 28-SPDIP through-hole footprint (vs SMD-only siblings (SOIC-28, QFN-28))
Design Notes
Decouple VDD and AVDD separately with 100 nF ceramic capacitors placed within 5 mm of each supply pin. Add a 10 uF bulk capacitor on the main VDD rail. AVdd and AVss pins (on SO/ML variants) should be tied to VDD/VSS on the 28-SPDIP package. Use an LDO such as MCP1700 to provide clean 4.2V-5.5V from higher input rails. Estimated: at 40 MHz with peripherals enabled, the 2585 draws approximately 16 mA active and <1 uA in sleep mode.
Do not leave MCLR floating - tie through a 10 kohm pull-up to VDD. Add ICSP programming header (PGC/PGD/MCLR/VSS/VDD) on every prototype PCB to enable in-circuit debugging. The LF prefix in PIC18LF2585 indicates low-voltage Flash; if your design uses voltages outside 4.2-5.5V, verify against datasheet 39637b or substitute the non-LF F-variant. Configuration bits must be set explicitly - do not rely on factory defaults.
Route the ECAN CANTX/CANRX pair to the CAN transceiver (e.g., MCP2551 or PCA82C250) with matched impedance and short trace lengths. Keep the oscillator traces short and surround with ground pour. The 10-bit ADC accuracy depends on clean AVdd; use a ferrite bead to isolate AVdd from digital VDD. ECAN bus requires 120 ohm termination at each end of the bus segment; missing termination is the most common field-deployment issue.
Estimated: the PIC18LF2585-I/SP at 40 MHz draws approximately 16 mA active, dissipating roughly 80 mW at 5 V. The 28-SPDIP package has a thermal resistance of approximately 50 C/W, yielding a 4 C junction temperature rise above ambient - well within the 125 C maximum. Industrial designs should derate 20 C maximum ambient for long-term reliability per Microchip reliability report.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade (-40C to +85C) is NOT AEC-Q100 qualified - choose automotive-grade PIC18 variants for vehicle applications.
