PIC18LF4585T-I/PT - 8-bit 40MHz 48KB Flash MCU w/ ECAN | Microchip
MPN: PIC18LF4585T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.42 | $7.42 |
| 10 | $6.95 | $69.50 |
| 100 | $6.21 | $621.00 |
| 500 | $5.55 | $2,775.00 |
| 1,000 | $5.03 | $5,030.00 |
PIC18LF4585T-I/PT Overview
Background Knowledge: The PIC18 family is Microchip's high-performance 8-bit microcontroller line built on a RISC architecture. An MCU (microcontroller) integrates a CPU core, non-volatile program memory (Flash), RAM, peripherals (timers, ADC, communication controllers) and I/O into a single chip. Within the PIC18 hierarchy, this part sits under PIC18F4585 family -> PIC18F45xx ECAN series -> PIC18F family, characterized by the ECAN peripheral and 40 MHz operation. The 'LF' prefix denotes the low-voltage variant designed to operate from 2.0 V, while the 'F' (non-LF) variant runs from 4.2 V minimum.
Key features include an 8-bit data path, 40 MHz maximum clock speed, 48 KB Flash (24K x 16 words), 3,328 bytes RAM, integrated ECAN module compliant with CAN 2.0B, 10-bit ADC up to 13 channels, three timers and the standard PIC18 peripheral set. The 44-TQFP (10x10 mm) package provides 36 digital I/O pins, suitable for industrial and automotive embedded designs.
Technical depth: The PIC18LF4585 employs a modified Harvard architecture with separate program and data buses, 16-bit opcodes and an 8-level hardware stack. The ECAN peripheral supports standard and extended identifiers, multiple transmit/receive buffers and acceptance filters, making the part suitable for industrial automation nodes. The LF (low-voltage) silicon runs core peripherals down to 2.0 V and supports nanoWatt technology for sleep currents in the microampere range.
Typical applications include CAN-based industrial sensor networks, automotive body and powertrain nodes, embedded control with CAN communication, and low-power field instrumentation. The 48 KB Flash supports CANopen and DeviceNet protocol stacks.
Design consideration: Pay attention to the 2.0 V minimum Vdd of the LF variant - if your system needs 5 V operation, choose the PIC18F4585T-I/PT instead. Use Microchip's MPLAB X IDE and the PICkit debugger for code development.
This page consolidates distributor pricing, drop-in alternatives, and practical design guidance beyond what the manufacturer datasheet alone provides.
Drop-in alternatives for PIC18LF4585T-I/PT — 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 PIC18LF4585T-I/PT (same form factor and footprint) — differing in Timers, Package, ADC, Program Memory Size, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF4585-I/PT
✅ Drop-In✓ In Stock
$6.34 / Unit
View Datasheet →PIC18F4585T-I/PT
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →PIC18LF4580T-I/PT
✅ Drop-In✓ In Stock
$4.32 / Unit
View Datasheet →PIC18LF458T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.5 / Unit
View Datasheet →PIC18LF4480T-I/PT
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC18LF4585T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Family | PIC18F4585 (PIC18F45xx ECAN series) |
| Data Bus Width | 8-bit |
| Maximum CPU Frequency | 40 MHz |
| Program Memory Size | 48 KB (24K x 16) Flash |
| RAM Size | 3,328 bytes |
| Supply Voltage (LF variant) | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| CAN Controller | ECAN (CAN 2.0B compliant) |
| ADC | 10-bit, up to 13 channels |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Package | 44-pin TQFP (PT) 10x10 mm |
| I/O Pins | 36 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Peripheral Family | nanoWatt low-power technology |
PIC18LF4585T-I/PT 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 SS |
| Pin 8 | RE0/RD/AN5 — Port E bit 0 / Parallel read / Analog input 5 |
| Pin 9 | RE1/WR/AN6 — Port E bit 1 / Parallel write / Analog input 6 |
| Pin 10 | RE2/CS/AN7 — Port E bit 2 / Parallel chip select / Analog input 7 |
| Pin 11 | VDD — Positive supply voltage (2.0-5.5 V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 14 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 15 | RC0/T1OSO/T13CKI — Port C bit 0 / Timer1 oscillator |
| Pin 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator / CCP2 |
| Pin 17 | RC2/CCP1 — Port C bit 2 / CCP1 PWM/capture |
| Pin 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Pin 19 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 20 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 21 | RC6/TX/CK — Port C bit 6 / USART TX / clock |
| Pin 22 | RC7/RX/DT — Port C bit 7 / USART RX / data |
| Pin 23 | RD0/PSP0 — Port D bit 0 / Parallel slave port bit 0 |
| Pin 24 | RD1/PSP1 — Port D bit 1 / Parallel slave port bit 1 |
| Pin 25 | RD2/PSP2 — Port D bit 2 / Parallel slave port bit 2 |
| Pin 26 | RD3/PSP3 — Port D bit 3 / Parallel slave port bit 3 |
| Pin 27 | RD4/PSP4 — Port D bit 4 / Parallel slave port bit 4 |
| Pin 28 | RD5/PSP5 — Port D bit 5 / Parallel slave port bit 5 |
| Pin 29 | RD6/PSP6/TX2 — Port D bit 6 / PSP bit 6 / ECAN TX2 |
| Pin 30 | RD7/PSP7/RX2 — Port D bit 7 / PSP bit 7 / ECAN RX2 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage (2.0-5.5 V) |
| Pin 33 | RB0/INT0/FLT0 — Port B bit 0 / External interrupt 0 / PWM fault 0 |
| Pin 34 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Pin 35 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| Pin 36 | RB3/INT3/CCP2 — Port B bit 3 / External interrupt 3 / CCP2 |
| Pin 37 | RB4/AN8 — Port B bit 4 / Analog input 8 |
| Pin 38 | RB5/AN9/PGM — Port B bit 5 / Analog input 9 / LVP program |
| Pin 39 | RB6/AN10/PGC — Port B bit 6 / Analog input 10 / ICSP clock |
| Pin 40 | RB7/AN11/PGD — Port B bit 7 / Analog input 11 / ICSP data |
| Pin 41 | CANTX — ECAN transmit output |
| Pin 42 | CANRX — ECAN receive input |
| Pin 43 | AVDD — Analog supply voltage (tie to VDD) |
| Pin 44 | AVSS — Analog ground (tie to VSS) |
Typical Applications
PIC18LF4585T-I/PT is suitable for 6 applications: CAN-Bus Industrial Sensor Nodes, Automotive Body and Powertrain Controllers, Industrial Automation Control, Building Automation and HVAC Networks, Battery-Backed Field Instrumentation, Medical Monitoring Devices.
CAN-Bus Industrial Sensor Nodes
The PIC18LF4585T-I/PT's ECAN controller compliant with CAN 2.0B and 48 KB Flash program memory makes it a strong fit for CAN-based industrial sensor nodes and remote I/O modules. The ECAN peripheral supports standard and extended identifiers with hardware acceptance filters, offloading the CPU from bus arbitration and enabling deterministic message latency under 200 us per frame at 1 Mbit/s. The 2.0 V minimum Vdd supports 3.3 V systems common in factory automation, while the nanoWatt technology drops quiescent current to microampere levels for battery-backed field sensors. Pair with an MCP2551 CAN transceiver, and use the Flash for CANopen or DeviceNet stack implementations.
Recommended
Automotive Body and Powertrain Controllers
Automotive body and powertrain ECUs require the ECAN bus interface and wide operating voltage range that the PIC18LF4585T-I/PT delivers. The part's -40 C to +85 C industrial temperature rating covers cabin and chassis applications, while the 40 MHz CPU executes CAN, LIN and PWM control loops at 10 MIPS per the Microchip datasheet. The 48 KB Flash fits typical body controller firmware with diagnostic routines, while the 10-bit ADC reads 13 analog sensor channels for throttle, temperature and pressure. For under-hood powertrain designs requiring 125 C operation, choose the PIC18F4585T-I/PT-ESO (extended temperature variant) instead.
Recommended
Industrial Automation Control
The PIC18LF4585T-I/PT suits industrial automation controllers combining ECAN communication, PWM motor drive and analog sensor acquisition on a single chip. The three on-chip timers generate 16-bit PWM for stepper or brushless DC motor speed control, while the 13-channel 10-bit ADC reads position feedback, current sensing and temperature monitoring. The 48 KB Flash accommodates ladder logic interpreters and Modbus/CANopen protocol stacks. Operating voltage flexibility (2.0 V to 5.5 V) lets the same hardware target 3.3 V or 5 V industrial backplanes without redesign, and the 36 I/O pins handle keypad inputs, relay outputs and opto-isolated interfaces.
Recommended
Building Automation and HVAC Networks
Building automation systems use the PIC18LF4585T-I/PT as a node controller on ECAN networks linking thermostats, VAV boxes and AHU controllers. The wide Vdd range supports both 24 V AC-derived DC supplies and battery-backed 3.3 V systems, while the nanoWatt sleep modes extend battery life for wireless HVAC sensors. The Flash memory stores BACnet or proprietary building automation protocol stacks, and the ECAN peripheral links 50+ nodes on a single twisted pair. Pair the MCU with a TCN75A temperature sensor and an MCP2551 transceiver for a complete BACnet MS/TP or CAN-based HVAC controller reference design per the Microchip application note AN729.
Recommended
Battery-Backed Field Instrumentation
Battery-powered field instrumentation such as portable data loggers, wireless sensor nodes and remote metering devices benefits from the PIC18LF4585T-I/PT's low-voltage operation and nanoWatt technology. The LF silicon operates down to 2.0 V from a single lithium cell or 2x AA alkaline pack, while sleep currents in the microampere range extend operating life to multiple years on a single battery. The ECAN controller links multiple field instruments to a wired backbone for periodic data uploads. The 48 KB Flash stores calibration tables and measurement logs, and the 10-bit ADC captures analog signals from sensor bridges and 4-20 mA current loops. Choose PIC18LF4585T-I/PT for battery-budget sensitive designs.
Recommended
Medical Monitoring Devices
Medical device prototypes for patient monitoring, infusion pumps and diagnostic instruments leverage the PIC18LF4585T-I/PT's reliability and 8-bit determinism. The 40 MHz CPU provides real-time response for alarm handling, while the 10-bit ADC reads ECG, SpO2 and temperature analog frontends. The ECAN interface connects bedside monitors to a central nurse station network, and the LF voltage range supports both battery-powered portable units and 5 V line-powered consoles. Note that for production medical devices requiring FDA submission, ensure the part is sourced through Microchip's medical-grade supply chain; the standard PIC18LF4585T-I/PT is suitable for non-life-support prototyping and design verification only.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF4585T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF4585-I/PT | PIC18F4585T-I/PT | PIC18LF4580T-I/PT | PIC18LF458T-I/PT | PIC18LF4480T-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm - same | 44-TQFP (PT) 10x10 mm - same | 44-TQFP (PT) 10x10 mm - same | 44-TQFP (PT) 10x10 mm - same | 44-TQFP (PT) 10x10 mm - same |
| Program Memory (Flash) | 48 KB | 48 KB | 48 KB | 48 KB | 32 KB | 16 KB |
| RAM Size | 3,328 bytes | 3,328 bytes | 3,328 bytes | 3,328 bytes | 1,536 bytes | 768 bytes |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| CAN Module | ECAN (CAN 2.0B) | ECAN (CAN 2.0B) | ECAN (CAN 2.0B) | Legacy CAN | ECAN (CAN 2.0B) | ECAN (CAN 2.0B) |
| Supply Voltage | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 4.2 V to 5.5 V (F) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) |
| ADC | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 11 channels | 10-bit, 11 channels |
Key Differentiators
- Low-voltage operation with nanoWatt technology (vs PIC18F4585T-I/PT)
- Enhanced ECAN controller vs legacy CAN (vs PIC18LF4580T-I/PT)
- Largest Flash in the PIC18LF458x family (vs PIC18LF458T-I/PT (32 KB))
Design Notes
Decouple both VDD pairs (pins 11/12 and 31/32) with 100 nF ceramic capacitors placed as close to the MCU as possible. AVDD (pin 43) and AVSS (pin 44) should also be decoupled with 100 nF plus 10 uF bulk. For noise-sensitive applications, route AVDD through a ferrite bead from VDD. The LF variant supports 2.0 V operation, so verify your LDO dropout margin at peak current (~50 mA) before settling on a regulator.
The 44-TQFP 10x10 mm package has 0.8 mm pitch pads - use NSMD land pattern with 0.4 mm pad width for reliable solder joint formation. Keep traces under the package to inner layers only to avoid shorts. Place the crystal or resonator within 5 mm of OSC1/OSC2 (pins 13/14) and guard the traces with a ground pour to minimize EMI. For ECAN applications, route CANTX (pin 41) and CANRX (pin 42) as a matched differential pair to the MCP2551 transceiver with characteristic impedance of 120 ohms.
Do not apply 5 V to the LF variant VDD when the part is configured for brown-out reset thresholds above 5 V - the LF silicon is rated to 5.5 V absolute maximum. When migrating from PIC18F4585 firmware to PIC18LF4585, check the configuration bits for the LF-specific oscillator and brown-out settings; otherwise the MCU may not start reliably at 3.3 V. The 'T' suffix denotes tape-and-reel packaging; for prototype builds in tray, order PIC18LF4585-I/PT instead. Always source from authorized distributors to avoid counterfeit parts.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade -40 C to +85 C (not automotive AEC-Q100 qualified - select PIC18F4585T-I/PT-ESO variants for automotive).