PIC18LC658-I/PT - 8-bit MCU 32KB Flash, CAN, 64-Pin TQFP | Microchip
MPN: PIC18LC658-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.5 | $11.50 |
| 10 | $10.35 | $103.50 |
| 100 | $9.2 | $920.00 |
| 500 | $8.05 | $4,025.00 |
| 1,000 | $7.3 | $7,300.00 |
PIC18LC658-I/PT Overview
What is a PIC18 LC microcontroller? PIC18 LC microcontrollers are low-power members of Microchip's 8-bit PIC18 family, optimized for applications that require lower core voltage operation than the standard PIC18F flash parts. They implement a Harvard-architecture RISC core with C-compiler-optimized instruction set, linear program-memory addressing up to 32 Kbytes, and linear data-memory addressing up to 4 Kbytes. They sit within the broader hierarchy: PIC18 LC -> PIC18 family -> 8-bit MCU -> microcontroller -> embedded controller -> semiconductor.
Key features include 52 digital I/O pins, an internal CAN 2.0B controller, USART, MSSP (SPI/I2C), 10-bit ADC, and capture/compare/PWM peripherals. Industrial-grade temperature rating (-40C to +85C) suits harsh-environment designs. The CAN module makes this part especially relevant for networked embedded systems where deterministic serial communication is required.
Technical depth: The 40MHz oscillator input drives a 4-phase internal pipeline producing 10 MIPS (million instructions per second) at 5V. Program memory uses 16-bit-wide flash cells accessed linearly via the program counter, while the 1536-byte SRAM is banked for C-friendly access via the FSR registers. The integrated CAN peripheral implements CAN 1.2, CAN 2.0A, and CAN 2.0B (active/standard identifier) frames with hardware acceptance filtering.
Typical applications include automotive body and chassis ECUs, industrial CAN nodes (sensor hubs, motor drives), building automation (HVAC controllers, BACnet/Modbus gateways), medical instrumentation, and embedded CAN-to-UART bridges. The 52 I/O pins and CAN module make it especially suited for distributed control networks where multiple microcontrollers must communicate over a robust differential bus.
Design consideration: Because the LC variant uses different on-chip program memory technology than the PIC18F family, code migration between LC and F parts requires re-verification of Vdd vs. speed tables and the erase/write algorithm. Designers should confirm peripheral register maps against the DS30475A datasheet errata.
This page synthesizes distributor pricing, drop-in alternatives from the PIC18 family, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18LC658-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 PIC18LC658-I/PT (same form factor and footprint) — differing in ADC, Core Architecture, MSL Level, Operating Temperature, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F458-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F6585-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.95 / Unit
View Datasheet →PIC18F8585-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$11.05 / Unit
View Datasheet →AT90CAN32-AUR
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LC658-I/PT Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit RISC (PIC18) |
| Family | PIC18 LC |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 1536 bytes |
| Number of I/O Pins | 52 |
| Package / Case | 64-pin TQFP (PT) |
| Maximum Clock Frequency | 40 MHz |
| Oscillator Type | External |
| Supply Voltage (Vdd) | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Integrated CAN Module | Yes (CAN 2.0B active) |
| USART | Yes |
| MSSP (SPI/I2C) | Yes |
| ADC | 10-bit |
| Mounting Type | Surface Mount |
| Packaging | Tube |
| RoHS Status | Compliant |
PIC18LC658-I/PT Pin Configuration
| Pin 1 | RC5 — Digital I/O / CCP module |
| Pin 2 | RC4 — Digital I/O / SPI SDO |
| Pin 3 | RC3 — Digital I/O / SPI SCK |
| Pin 4 | RC2 — Digital I/O / CCP PWM output |
| Pin 5 | RC1 — Digital I/O / CCP PWM output |
| Pin 6 | RC0 — Digital I/O / Timer oscillator |
| Pin 7 | OSC1 — External oscillator input |
| Pin 8 | OSC2 — External oscillator output |
| Pin 9 | RA0 — Digital I/O / analog input |
| Pin 10 | RA1 — Digital I/O / analog input |
| Pin 11 | RA2 — Digital I/O / analog input |
| Pin 12 | RA3 — Digital I/O / analog input / VREF+ |
| Pin 13 | RA4 — Digital I/O / analog input |
| Pin 14 | RA5 — Digital I/O / analog input / ADC ref |
| Pin 15 | Vss — Ground |
| Pin 16 | Vdd — Power supply |
| Pin 17 | RB0 — Digital I/O / external interrupt |
| Pin 18 | RB1 — Digital I/O |
| Pin 19 | RB2 — Digital I/O |
| Pin 20 | RB3 — Digital I/O |
| Pin 21 | RB4 — Digital I/O / interrupt-on-change |
| Pin 22 | RB5 — Digital I/O / interrupt-on-change |
| Pin 23 | RB6 — Digital I/O / interrupt-on-change |
| Pin 24 | RB7 — Digital I/O / interrupt-on-change |
| Pin 25 | RC6 — Digital I/O / TX (USART) |
| Pin 26 | RC7 — Digital I/O / RX (USART) |
| Pin 27 | RD0 — Digital I/O |
| Pin 28 | RD1 — Digital I/O |
| Pin 29 | RD2 — Digital I/O |
| Pin 30 | RD3 — Digital I/O |
| Pin 31 | RD4 — Digital I/O |
| Pin 32 | RD5 — Digital I/O |
| Pin 33 | RD6 — Digital I/O |
| Pin 34 | RD7 — Digital I/O |
| Pin 35 | Vss — Ground |
| Pin 36 | Vdd — Power supply |
| Pin 37 | RE0 — Digital I/O / CANRX |
| Pin 38 | RE1 — Digital I/O / CANTX |
| Pin 39 | RE2 — Digital I/O |
| Pin 40 | RE3 — Digital I/O |
| Pin 41 | RE4 — Digital I/O |
| Pin 42 | RE5 — Digital I/O |
| Pin 43 | RE6 — Digital I/O |
| Pin 44 | RE7 — Digital I/O |
| Pin 45 | Vss — Ground |
| Pin 46 | Vdd — Power supply |
| Pin 47 | RF0 — Digital I/O / analog input |
| Pin 48 | RF1 — Digital I/O / analog input |
| Pin 49 | RF2 — Digital I/O / analog input |
| Pin 50 | RF3 — Digital I/O / analog input |
| Pin 51 | RF4 — Digital I/O / analog input |
| Pin 52 | RF5 — Digital I/O / analog input |
| Pin 53 | RF6 — Digital I/O / analog input |
| Pin 54 | RF7 — Digital I/O / analog input |
| Pin 55 | RG0 — Digital I/O |
| Pin 56 | RG1 — Digital I/O |
| Pin 57 | RG2 — Digital I/O |
| Pin 58 | RG3 — Digital I/O |
| Pin 59 | RG4 — Digital I/O |
| Pin 60 | MCLR — Master clear reset input |
| Pin 61 | RG5 — Digital I/O |
| Pin 62 | NC — Not connected |
| Pin 63 | NC — Not connected |
| Pin 64 | AVdd — Analog power supply |
Typical Applications
PIC18LC658-I/PT is suitable for 6 applications: Industrial CAN Sensor Hub, Building Automation Controller, Automotive Body Control Module, Medical Instrumentation Interface, Embedded CAN-to-UART Bridge, Motor Control Drive Interface.
Industrial CAN Sensor Hub
The PIC18LC658-I/PT fits an industrial CAN sensor hub with its integrated CAN 2.0B controller and 52 I/O pins. The 2.0-5.5V Vdd range allows direct connection to 3.3V sensor arrays, while 32KB flash holds the CANopen or DeviceNet stack and 1536B RAM buffers incoming frames. At 40 MHz / 10 MIPS, the core handles 1 kHz control loops while responding to remote CAN requests. The 10-bit ADC reads up to 8 analog sensors per hub.
Recommended
Building Automation Controller
In building automation the PIC18LC658-I/PT provides reliable network connectivity over CAN or BACnet via its hardware CAN module and the 5V-tolerant I/O that interfaces with relays and triac drivers. The 32KB flash holds RTOS or cooperative scheduler code plus HVAC control algorithms, while 1536B RAM supports message queues and task stacks. The -40C to +85C industrial temperature rating suits unheated plant rooms and rooftop enclosures.
Recommended
Automotive Body Control Module
The PIC18LC658-I/PT serves automotive body control nodes such as lighting controllers, mirror adjusters, and seat controllers. The integrated CAN 2.0B controller participates in body-network communication at 125-500 kbps while 52 I/O pins drive LED PWM outputs and switch inputs. Industrial temperature rating supports under-dash environments, and 32KB flash stores diagnostic handlers, while 1536B RAM stores fault logs and CAN frame buffers.
Recommended
Medical Instrumentation Interface
For medical instrument interface boards the PIC18LC658-I/PT offers 5V tolerance for analog front-end integration and a CAN port for network communication with host systems. The 32KB flash holds calibration routines and operator UI state machines, while 1536B RAM supports data buffers for sensor readouts. The part's deterministic interrupt response and CAN hardware acceptance filtering minimize host-side polling overhead.
Recommended
Embedded CAN-to-UART Bridge
As a CAN-to-UART bridge the PIC18LC658-I/PT uses its hardware CAN controller to receive CAN frames and re-serializes them over the USART for legacy host equipment. The 40 MHz clock gives sufficient throughput to handle 1 Mbps CAN traffic without dropped frames, while 32KB flash accommodates packet formatting and protocol conversion. The 5V-tolerant I/O simplifies legacy serial interface designs.
Recommended
Motor Control Drive Interface
For stepper or BLDC motor drive interfaces the PIC18LC658-I/PT generates PWM signals on multiple I/O pins while monitoring current feedback via the 10-bit ADC. The CAN peripheral enables coordinated multi-axis motion control with cycle times under 1 ms. Industrial temperature rating suits factory-floor deployment, and 32KB flash stores the trapezoidal or sinusoidal commutation tables.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LC658-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F458-I/PT | PIC18F6585-I/PT | PIC18F8585-I/PT | AT90CAN32-AUR |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin TQFP (PT) | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP (PT) - same | 64-pin TQFP - same |
| Program Memory | 32 KB | 32 KB | 96 KB | 96 KB | 32 KB |
| RAM Size | 1536 B | 2048 B | 2048 B | 3320 B | 2048 B |
| CAN Module | Yes (CAN 2.0B) | Yes | Yes | Yes | Yes |
| Min Vdd | 2.0 V | 4.2 V | 4.2 V | 4.2 V | 2.7 V |
| Max Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 16 MHz |
| Number of I/O | 52 | 32 | 52 | 68 | 53 |
Key Differentiators
- Wide Vdd range enabling 3.3V CAN nodes (vs PIC18F458-I/PT)
- Higher flash density for firmware upgrade path (vs PIC18F458-I/PT)
- Deterministic CAN 2.0B hardware acceleration (vs AT90CAN32-AUR)
Design Notes
Decouple Vdd and AVdd pins with separate 100nF ceramic capacitors placed within 5mm of each Vdd pin; add a bulk 10uF tantalum or ceramic capacitor on each rail. The PIC18LC658 requires a stable 2.0-5.5V supply; Vdd ripple under 50mV prevents oscillator glitches. For CAN-bus-powered designs, isolate the bus-side and digital-side grounds through a 1kV-rated isolator to protect the MCU from bus transients.
Route the oscillator traces (OSC1/OSC2) within 10mm of the chip, keep them short and parallel, and guard with a ground pour to minimize EMI pickup. Place the MCLR pull-up (typically 10k) close to the MCU, and add a 1nF cap to ground if MCLR is exposed to external noise. Route CANRX/CANTX to the transceiver with matched 50 ohm traces or twisted pair, and place an optional ferrite bead for EMI suppression.
Do not assume the LC and F variants share identical flash erase/write routines - the LC variant's program memory architecture differs from the F variant. Verify voltage and frequency scaling tables in the datasheet; at 2.0V Vdd the maximum oscillator may drop to 4 MHz. Confirm that the CAN module is configured for the correct bus speed before enabling interrupts, and that oscillator configuration bits match external crystal characteristics.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC18F458-I/PT or automotive-grade PIC18 variants for automotive applications.
