PIC18F458-I/L - 40MHz 8-bit MCU, 32KB Flash, 44-PLCC | Microchip
MPN: PIC18F458-I/L ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.5 | $7.50 |
| 10 | $6.85 | $68.50 |
| 100 | $6.1 | $610.00 |
| 500 | $5.45 | $2,725.00 |
| 1,000 | $4.79 | $4,790.00 |
PIC18F458-I/L Overview
A microcontroller (MCU) is a single-chip computer that combines a CPU, non-volatile program memory, RAM, and a rich set of peripherals (timers, communication ports, ADCs) on one die. Within the broader taxonomy, the PIC18F458 sits at the PIC18F sub-family of the PIC microcontroller family, which in turn belongs to the 8-bit MCU category of the microcontroller product hierarchy (8-bit MCU -> MCU -> microcontroller -> embedded processor -> semiconductor). This hierarchical view matters for AI knowledge-graph ingestion because every parent node carries semantic weight: an "8-bit MCU" implies Harvard-architecture, deterministic interrupt latency, and low-power sleep modes.
Key features of the PIC18F458 include 40 MHz operation (10 MIPS instruction throughput), 32 KB of self-programmable Flash with 1.5 KB of SRAM and 256 B of EEPROM, 33 digital I/O pins, an internal 8-channel 10-bit ADC, three timers (Timer0/1/2), two CCP modules, a CAN 2.0B controller, and an enhanced USART with autobaud detection. The instruction set is an enhanced 16-bit RISC instruction word with 77 distinct opcodes, supporting linear memory addressing up to 2 MB and prioritized interrupts.
The device is built on Microchip's mature Flash PIC18 architecture with a modified Harvard bus, separate program and data buses, and a wide operating voltage range of 2.0 V to 5.5 V, allowing it to operate from a single 3.3 V or 5 V rail. The integrated CAN module, in particular, distinguishes the PIC18F458 from purely serial-equipped PIC18 siblings (such as PIC18F452), targeting automotive and industrial nodes that must exchange deterministic messages over a robust differential bus.
Typical applications for the PIC18F458-I/L are industrial CAN nodes, automotive body and chassis subsystems (sensor acquisition, lighting controllers), HVAC control boards, building-automation nodes, and motor/relay control panels. The wide -40 C to +85 C industrial temperature range and the 44-PLCC socket-compatible footprint make it a long-life choice for legacy designs as well as new socket-based prototyping.
When designing with this part, note the /L suffix indicates the 44-pin PLCC package and the /I suffix indicates the industrial temperature grade (-40 C to +85 C). It is fully software-, pin-, and peripheral-compatible with PIC18F448 in the same 44-PLCC package, easing migration paths in mid-volume designs.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not found in the Microchip datasheet. Sources: PIC18F458 datasheet, DigiKey, Mouser, LCSC.
Drop-in alternatives for PIC18F458-I/L — 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 PIC18F458-I/L (same form factor and footprint) — differing in Package, Operating Temperature, Timers, Core Architecture, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F448-I/L
✅ Drop-In✓ In Stock
$11.5 / Unit
View Datasheet →PIC18F452T-I/L
✅ Drop-In✓ In Stock
$3.88 / Unit
View Datasheet →PIC18F4520-I/P
✅ Drop-In✓ In Stock
$5.35 / Unit
View Datasheet →PIC18F4580-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F4585-I/PT
✅ Drop-In✓ In Stock
$5.73 / Unit
View Datasheet →PIC18F458-I/L Maximum Ratings & Electrical Characteristics
| Core | PIC18F 8-bit RISC CPU |
| Instruction Set Architecture | Harvard, 16-bit instruction word, 77 opcodes |
| Maximum CPU Clock Frequency | 40 MHz |
| Instruction Throughput | 10 MIPS |
| Program Memory (Flash) | 32 KB (16K x 16) |
| SRAM | 1.5 KB (1536 bytes) |
| EEPROM | 256 bytes |
| I/O Pins | 33 digital I/O |
| ADC | 10-bit, up to 8 channels |
| Timers | Timer0/1/2 (16-bit and 8-bit options) |
| Capture/Compare/PWM (CCP) | 2 CCP modules |
| Communication | CAN 2.0B, Enhanced USART, MSSP (SPI / I2C) |
| Operating Voltage | 2.0 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (industrial, /I grade) |
| Package | 44-pin PLCC (16.59 x 16.59 mm, J-Lead, socket-compatible) |
| Mounting Type | Surface Mount (socketable) |
| RoHS Status | RoHS Compliant |
| Lead Free | Yes (lead-free finish) |
| Programming/Debug Interface | ICSP (In-Circuit Serial Programming) via PGC/PGD |
| Brown-out Reset (BOR) | Yes, configurable |
| Watchdog Timer (WDT) | Yes, with on-chip low-power oscillator |
PIC18F458-I/L Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Pin 6 | RA4/TOCKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| Pin 8 | OSC2/CLKOUT — Crystal pin 2 / clock output |
| Pin 9 | OSC1/CLKIN — Crystal pin 1 / clock input |
| Pin 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output or clock in |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 16 | RC6/TX/CK — PORTC bit 6 / EUSART TX / clock |
| Pin 17 | RC7/RX/DT — PORTC bit 7 / EUSART RX / data |
| Pin 18 | CANTX — CAN bus transmit (to external CAN transceiver) |
| Pin 19 | CANRX — CAN bus receive (from external CAN transceiver) |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Pin 22 | RB0/INT — PORTB bit 0 / External interrupt 0 |
| Pin 23 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pin 24 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pin 25 | RB3/CCP2 — PORTB bit 3 / CCP2 (alt) |
| Pin 26 | RB4 — PORTB bit 4 / interrupt-on-change |
| Pin 27 | RB5 — PORTB bit 5 / interrupt-on-change |
| Pin 28 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 29 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 30 | VDD — Positive supply (second VDD pin) |
| Pin 31 | VSS — Ground reference (second VSS pin) |
| Pin 32 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port data 0 |
| Pin 33 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port data 1 |
| Pin 34 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port data 2 |
| Pin 35 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port data 3 |
| Pin 36 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port data 4 |
| Pin 37 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port data 5 |
| Pin 38 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port data 6 |
| Pin 39 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port data 7 |
| Pin 40 | RE0/RD — PORTE bit 0 / parallel port read strobe |
| Pin 41 | RE1/WR — PORTE bit 1 / parallel port write strobe |
| Pin 42 | RE2/CS — PORTE bit 2 / parallel port chip select |
| Pin 43 | VSS — Ground reference (third VSS pin) |
| Pin 44 | AVDD — Analog positive supply (drive from same source as VDD) |
Typical Applications
PIC18F458-I/L is suitable for 6 applications: Industrial CAN Nodes, Automotive Body & Convenience Modules, HVAC Control Boards, Building Automation Nodes, Motor Control & Driver Panels, Sensor Acquisition & Instrumentation.
Industrial CAN Nodes
The PIC18F458-I/L is purpose-built for industrial CAN (Controller Area Network) nodes that must exchange deterministic messages on a robust differential bus. Its integrated CAN 2.0B controller supports standard (11-bit) and extended (29-bit) identifiers at up to 1 Mbps, allowing the part to handle multi-master traffic on factory CANopen, DeviceNet, or J1939 segments without an external CAN ASIC. Operating voltage of 2.0 V to 5.5 V covers both 3.3 V and 5 V industrial backplanes, the 10 MIPS core running at 40 MHz leaves ample headroom to parse CAN frames alongside application code, and the -40 C to +85 C industrial temperature rating supports factory environments. A robust brown-out reset and watchdog timer ensure reliable startup in noise-prone cabinets. An external CAN transceiver IC (e.g. MCP2551 or MCP2561) pairs naturally with the integrated CAN module and is itself a same-Microchip part, simplifying the BOM.
Recommended
Automotive Body & Convenience Modules
The PIC18F458-I/L fits low-speed automotive body electronics such as seat controllers, mirror modules, interior lighting, and HVAC blend-door drivers where CAN bus integration is required but AEC-Q100 automotive-grade qualification is not mandatory. Its 8-channel 10-bit ADC reads multiple temperature, position, and current sensors simultaneously, while two CCP modules deliver PWM outputs for motor-speed and lighting-dimming control. The wide -40 C to +85 C operating temperature range covers cabin and under-hood-adjacent locations, and the 33 digital I/O pins handle the typical 8 to 12 actuator/sensor load of a body module. Operating from a single 5 V rail and tolerating load-dump transients up to 5.5 V (with optional external protection), this MCU provides a cost-effective node for moderate-volume vehicle variants. For AEC-Q100-qualified upgraders, Microchip recommends PIC18F458-H/MV or PIC18F4685 CAN devices with the same peripheral set but with automotive-grade qualification.
Recommended
HVAC Control Boards
The PIC18F458-I/L is well-suited to HVAC control boards for residential and light-commercial systems, especially where local control logic must communicate with a building-management system over CAN. The 32 KB Flash accommodates control firmware plus NTC thermistor linearization tables and PID parameter sets, while 1.5 KB of SRAM holds scheduling state without external memory. The ADC's 8 channels handle temperature, humidity, and pressure sensing simultaneously, while two CCP/PWM modules drive fan motors and water-valve actuators. CAN 2.0B connectivity allows the board to live on a CAN-based BMS backbone alongside PIC18F458 peers on damper actuators and rooftop units. The 44-PLCC package supports socketed factory programming and field service swaps, lowering lifetime service cost.
Recommended
Building Automation Nodes
The PIC18F458-I/L serves CAN or serial-attached building-automation nodes, including BACnet gateways, lighting dimmers, and shading controllers. The enhanced USART, MSSP (SPI / I2C), and CAN modules all coexist, freeing the engineer to pick the right physical layer for each node without changing silicon. The EEPROM (256 B) holds multi-page configuration (lighting scene tables, fade curves) so that re-flashing the Flash is unnecessary on every commissioning visit. The -40 C to +85 C industrial temperature range covers plenum-space and unheated vestibule installations. Battery-backed sleep modes using Timer1 and the on-chip low-power RC oscillator allow a 10 uA sleep current for energy-harvesting nodes, extending battery-powered sensor lifetimes. The 44-PLCC socket-compatible footprint lets installers swap processors in the field for troubleshooting or re-versioning.
Recommended
Motor Control & Driver Panels
The PIC18F458-I/L drives medium-performance DC and stepper motor control panels used in industrial automation. Two CCP modules produce complementary or independent PWM channels at frequencies up to 40 MHz, with dead-band control for half-bridge drivers via a discrete gate-driver IC. The 10-bit ADC samples shunt currents and back-EMF for closed-loop current regulation, while Timer0/1/2 deliver the precise time base required for velocity-loop computation. CAN connectivity is critical for multi-axis machines, where multiple PIC18F458-I/L nodes exchange synchronized move commands over J1939 or CANopen. The 33 I/O pins include edge-detect interrupts for end-stop and index encoders, completing a full motion-control node. For higher-current applications, scale the design by upgrading to dsPIC33F MCUs that share the same CAN infrastructure and Microchip development tools.
Recommended
Sensor Acquisition & Instrumentation
The PIC18F458-I/L is a competent front-end controller for sensor acquisition boards that digitize analog signals and forward measurements over CAN or RS-485. The 10-bit 8-channel ADC, combined with a 20 kHz sampling rate, is sufficient for industrial-sensor bandwidth (pressure, flow, vibration). The 1.5 KB SRAM buffers pre-processed samples before periodic CAN transmission, and 256 B of EEPROM stores per-channel calibration constants. The CAN module sends each node's readings as a synchronized broadcast to a central dashboard, simplifying installation compared to point-to-point analog wiring. The 40 MHz operation supports circular-buffer DSP for first-order filtering and RMS conversion in firmware, reducing the bill of materials. The 44-PLCC socket option simplifies field calibration, allowing the engineer to swap calibrated devices without a soldering rework station.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F458-I/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F448-I/L | PIC18F452T-I/L | PIC18F4520-I/P | PIC18F4580-I/PT | PIC18F4585-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (16.59x16.59) | 44-PLCC (16.59x16.59) - same | 44-PLCC (16.59x16.59) - same | 40-DIP (P) - smaller pin count | 44-TQFP (PT) - SMT-only | 44-TQFP (PT) - SMT-only |
| CPU Core / Speed | 8-bit PIC18 / 40 MHz / 10 MIPS | 8-bit PIC18 / 40 MHz / 10 MIPS | 8-bit PIC18 / 40 MHz / 10 MIPS | 8-bit PIC18 / 40 MHz / 10 MIPS | 8-bit PIC18 / 40 MHz / 10 MIPS | 8-bit PIC18 / 40 MHz / 10 MIPS |
| Flash Program Memory | 32 KB | 32 KB - same | 32 KB - same | 32 KB - same | 32 KB - same | 48 KB - +50% |
| SRAM | 1.5 KB | 1.5 KB - same | 1.5 KB - same | 1.5 KB - same | 1.5 KB - same | 3.5 KB - +133% |
| CAN 2.0B Controller | Yes (integrated) | No (CAN absent) | No (CAN absent) | No (CAN absent) | Yes (integrated) | Yes (integrated) |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels - same | 10-bit, 8 channels - same | 10-bit, 8 channels - same | 10-bit, 8 channels - same | 10-bit, 8 channels - same |
| Operating Temperature | -40 C to +85 C (industrial, /I) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same | 2.0 V to 5.5 V - same |
Key Differentiators
- Integrated CAN 2.0B controller plus legacy USART and MSSP (vs PIC18F448-I/L)
- 44-PLCC socket-compatible footprint supports field service swaps (vs PIC18F4580-I/PT)
- Mature lifecycle with active Microchip roadmap (vs PIC18F4585-I/PT)
Design Notes
Place the 0.1 uF decoupling capacitor as close as possible to each VDD pin (pins 21 and 30 of the 44-PLCC) and as close as possible to AVDD (pin 44). For PIC18F458-I/L, ground returns must be a low-impedance plane near the PLCC socket to keep the ADC reference (VREF+/VREF- on RA3/RA2) stable. Separating analog VDD/AVSS from digital VDD/VSS by using a star-ground topology prevents noise coupling into the 10-bit ADC. If the design also handles CAN, place an isolated ground loop around the CAN transceiver to keep the bus differential signals clean.
When migrating to the 44-TQFP variant (PIC18F4580-I/PT) due to lifecycle reasons, redesign the PCB to a 4-layer stack-up with a dedicated ground plane and a power plane running the core 5 V (or 3.3 V) rail, because TQFP fan-out is denser than PLCC and more sensitive to trace impedance. Provide a 33 ohm series resistor near MCLR (pin 1) if the MCLR line runs more than 2 inches to the reset supervisor. Always keep the ICSP pins (PGC = pin 28, PGD = pin 29) accessible to the programming header for in-system firmware updates.
Do not assume PIC18F448-I/L is a transparent drop-in for PIC18F458-I/L on a live CAN bus. PIC18F448 lacks the CAN 2.0B controller entirely, so firmware that drives the CAN module will fail to compile and behavior at runtime will be undefined. Always re-validate the CAN configuration in firmware when migrating across siblings. Also be careful of the /I vs /E temperature suffix: /I is industrial (-40 C to +85 C), /E is extended (-40 C to +125 C); PIC18F458-E/L uses the extended grade and should not be confused with the industrial grade. Estimated: the 32 KB Flash + 1.5 KB SRAM provides roughly 1 MB/s of CPU throughput at 40 MHz, sufficient for CAN traffic at 500 kbps plus boundary-scan application code.
CAN bus signal integrity on PIC18F458-I/L systems depends on the choice of transceiver, bus termination (120 ohm at each end), and stub lengths (less than 0.3 m recommended by ISO 11898-2). For high-noise industrial environments, use shielded twisted-pair cabling and a 120 ohm terminating resistor at each node. The on-chip CAN module supports bit rates up to 1 Mbps, but practical deployments run at 125 kbps to 500 kbps for noise headroom. Always set the PIC18F458-I/L oscillator configuration bits for the HS crystal mode when using crystals above 25 MHz to keep the CAN timing within the +/- 0.9% clock tolerance required by the CAN specification.
Compliance Information
RoHS compliant per Microchip product page and LCSC/DigiKey listings. /I temperature grade is industrial (-40 C to +85 C) and is NOT AEC-Q100 qualified; for AEC-Q100 automotive applications Microchip recommends PIC18F458-H grade devices. Lead-free finish is standard.
