PIC18F458T-I/L - 40MHz 8-bit MCU 32KB Flash CAN | Microchip
MPN: PIC18F458T-I/L ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.32 | $9.32 |
| 10 | $8.49 | $84.90 |
| 100 | $7.45 | $745.00 |
| 500 | $6.78 | $3,390.00 |
| 1,000 | $6.1 | $6,100.00 |
PIC18F458T-I/L Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and programmable peripherals on one silicon die. The PIC18 family sits between PIC16 mid-range and PIC24 dsPIC parts in Microchip's portfolio and is widely used for cost-sensitive embedded control where deterministic interrupt response and broad peripheral integration outperform raw MHz.
Key features include a 32KB flash program store configurable for self-programming, an enhanced CAN 2.0B module with acceptance filters, a 10-bit A/D converter delivering up to 8 channels of analog input, a USART with LIN support, a master/slave SSP port for SPI/I2C, capture/compare/PWM modules, and brown-out/bor reset circuitry. The integrated CAN peripheral is the headline feature, eliminating the need for an external controller chip in industrial and automotive networking applications.
From an architecture view, the PIC18F458 uses a Harvard cache architecture with separate program and data paths, hardware multiplier, and a 16-bit instruction word mapped to an 8-bit data path for code density. The part supports in-circuit serial programming and in-circuit debugging via two I/O pins, accelerating firmware iteration. PLCC-44 packaging is favored for socketed industrial designs where field replacement is expected.
Typical applications include CAN node modules on industrial machinery and automotive subnet controllers, household appliances, sensor interface boards, and small stepper/solenoid drivers. The CAN peripheral and 33 I/O capability position the PIC18F458T-I/L as a network-attached supervisory node in simple automation hierarchies.
When designing with this device, allocate the oscillator budget carefully - switching from a 20 MHz crystal to the 40 MHz maximum changes power dissipation roughly linearly. Add bulk capacitance near the AVdd pin to keep ADC SNR within datasheet limits, and consult the Microchip MPLAB IDE for register-level peripheral configuration.
This page synthesizes current distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet for engineers selecting a CAN-capable 8-bit MCU in a PLCC-44 footprint.
Drop-in alternatives for PIC18F458T-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 PIC18F458T-I/L (same form factor and footprint) — differing in Package, Mounting Type, Operating Temperature, Core, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F458-I/L
✅ Drop-In✓ In Stock
$4.79 / Unit
View Datasheet →PIC18F448-I/L
✅ Drop-In✓ In Stock
$11.5 / Unit
View Datasheet →PIC18F448T-I/L
✅ Drop-In✓ In Stock
$6.1 / Unit
View Datasheet →PIC18F452T-I/L
✅ Drop-In✓ In Stock
$3.88 / Unit
View Datasheet →PIC18F458T-I/L Maximum Ratings & Electrical Characteristics
| Core | PIC18 (8-bit RISC) |
| Program Memory | 32 KB Flash |
| RAM | 1.5 KB |
| EEPROM | 256 bytes |
| Instruction Set Width | 16-bit |
| Maximum Clock Frequency | 40 MHz |
| Throughput | 10 MIPS |
| Operating Supply Voltage | 4.2 V to 5.5 V |
| Number of I/O Pins | 33 |
| ADC | 10-bit, 8 channels |
| Integrated CAN | CAN 2.0B with acceptance filters |
| UART/USART | 1 channel with LIN support |
| SPI | Master/Slave SSP |
| I2C | Master/Slave SSP |
| PWM Modules | Yes (CCP/ECCP) |
| Package | 44-pin PLCC (16.59 x 16.59 mm) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount (J-Lead) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC18F458T-I/L Pin Configuration
| Pin 1 | MCLR/Vpp — Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 — Digital I/O or ADC analog input 0 |
| Pin 3 | RA1/AN1 — Digital I/O or ADC analog input 1 |
| Pin 4 | RA2/AN2/Vref- — Digital I/O / ADC analog input 2 / ADC reference minus |
| Pin 5 | RA3/AN3/Vref+ — Digital I/O / ADC analog input 3 / ADC reference plus |
| Pin 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Digital I/O / ADC input 4 / SPI slave select |
| Pin 8 | RE0/RD/AN5 — Port E bit 0 / Parallel slave port read / ADC |
| Pin 9 | RE1/WR/AN6 — Port E bit 1 / Parallel slave port write / ADC |
| Pin 10 | RE2/CS/AN7 — Port E bit 2 / Parallel slave port chip select / ADC |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Pin 14 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pin 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / clock input |
| Pin 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator / CCP2 module |
| Pin 17 | RC2/CCP1 — Port C bit 2 / Capture Compare PWM1 |
| 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 async transmit / clock |
| Pin 22 | RC7/RX/DT — Port C bit 7 / USART async receive / data |
| Pin 23 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| Pin 24 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| Pin 25 | RB2/INT2/CANTX — Port B bit 2 / INT2 / CAN transmit (peripheral alternate) |
| Pin 26 | RB3/CANRX — Port B bit 3 / CAN receive (peripheral alternate) |
| Pin 27 | RB4 — Port B bit 4 |
| Pin 28 | RB5 — Port B bit 5 |
| Pin 29 | RB6/PGC — Port B bit 6 / In-circuit debugger clock |
| Pin 30 | RB7/PGD — Port B bit 7 / In-circuit debugger data |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | NC — Not connected (reserved per datasheet) |
| Pin 34 | NC — Not connected (reserved per datasheet) |
| Pin 35 | NC — Not connected (reserved per datasheet) |
| Pin 36 | NC — Not connected (reserved per datasheet) |
| Pin 37 | NC — Not connected (reserved per datasheet) |
| Pin 38 | NC — Not connected (reserved per datasheet) |
| Pin 39 | NC — Not connected (reserved per datasheet) |
| Pin 40 | NC — Not connected (reserved per datasheet) |
| Pin 41 | NC — Not connected (reserved per datasheet) |
| Pin 42 | NC — Not connected (reserved per datasheet) |
| Pin 43 | NC — Not connected (reserved per datasheet) |
| Pin 44 | NC — Not connected (reserved per datasheet) |
Typical Applications
PIC18F458T-I/L is suitable for 6 applications: Industrial CAN Node Module, Automotive Body and Convenience Sub-Net, Home Appliance Control Board, Sensor Interface / Data Acquisition Front End, Stepper and Solenoid Driver Module, Legacy Industrial Control Replacement.
Industrial CAN Node Module
The PIC18F458T-I/L is a strong fit for industrial CAN nodes because it integrates a CAN 2.0B controller with acceptance filters directly on chip, removing any need for an external CAN controller. With 32 KB of flash it can host CANOpen or DeviceNet slave stacks, and its 33 I/O pins are sufficient for typical sensor-actuator interfaces. The 40 MHz clock provides 10 MIPS of throughput, comfortably executing the CAN state machine plus the application task at 1 Mbit/s bus rates. PLCC-44 packaging suits socketed industrial modules where field replacement is anticipated without tools or reflow.
Recommended
Automotive Body and Convenience Sub-Net
In automotive body and convenience modules - window lifters, mirror controllers, HVAC flap drives - the PIC18F458T-I/L provides CAN communication via its integrated CAN 2.0B controller. The 10-bit ADC supports analog sensing of position or temperature, and the PWM modules drive small DC motors directly. Note this is the industrial-grade variant rated to +85 C; for under-hood modules above 85 C, choose the AEC-Q100 qualified -EPT extended-temperature PIC18F4585 family. The PLCC-44 package is favored for legacy automotive designs with sockets.
Recommended
Home Appliance Control Board
For washing machines, dishwashers, and induction cookers, the PIC18F458T-I/L provides 33 I/O for keypad scanning, relay drivers, triac interfaces, and sensor inputs. The 1.5 KB RAM accommodates user-interface state machines without external memory, and 32 KB flash holds control firmware plus diagnostic logs. The CAN peripheral is useful in premium appliances that participate in home-net or smart-grid networks. Industrial temperature grade (-40 C to +85 C) covers kitchen environments where ambient temperature spikes are common during operation.
Recommended
Sensor Interface / Data Acquisition Front End
The PIC18F458T-I/L's 10-bit ADC with up to 8 channels makes it a competitive analog front end for moderate-accuracy sensing, while its CAN and USART ports forward digitized sensor data to a host controller. The 256-byte EEPROM can store calibration coefficients. Running at 40 MHz, the ADC can be oversampled for effective noise reduction. Use this design when sensor nodes need to publish data on a CAN bus (e.g., machine tool status monitoring) rather than rely on analog signal wiring back to a PLC.
Recommended
Stepper and Solenoid Driver Module
With its PWM modules (CCP/ECCP), 33 I/O, and CAN peripheral, the PIC18F458T-I/L serves as a complete stepper motor or solenoid driver node. Each PWM channel can drive a small half-bridge via external MOSFETs, and the USART allows service/debug communication. The CAN bus allows a central PLC to coordinate motion profiles. Industrial temperature grade covers factory automation environments, and the PLCC-44 socket-friendly package simplifies module replacement in the field.
Recommended
Legacy Industrial Control Replacement
The PIC18F458T-I/L is often specified as a modern replacement for legacy 8051 or PIC16 designs that have grown past their original memory budget. Its 32 KB flash and 1.5 KB RAM allow porting existing firmware with no architectural rewrite, while the CAN and PWM peripherals add networking and motion features. The PLCC-44 pinout drops into pre-existing sockets of earlier PIC18F448/PIC18F458 designs, making this part ideal for upgrade programs where the goal is more memory and same form factor.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F458T-I/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F458-I/L | PIC18F448-I/L | PIC18F448T-I/L | PIC18F4585T-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (16.59 x 16.59 mm) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same | 44-TQFP - different |
| Flash Memory | 32 KB | 32 KB | 16 KB | 16 KB | 48 KB |
| RAM | 1.5 KB | 1.5 KB | 768 B | 768 B | 3.3 KB |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 48 MHz |
| Integrated CAN 2.0B | Yes | Yes | Yes | Yes | Yes |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Number of I/O | 33 | 33 | 33 | 33 | 36 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Largest flash in PLCC-44 PIC18F448/PIC18F458 family at 32 KB (vs PIC18F448-I/L)
- Integrated CAN 2.0B with acceptance filters (vs PIC18F452T-I/L)
- Tape-and-reel (T suffix) PLCC-44 ready for SMT assembly (vs PIC18F458-I/L)
Design Notes
Estimated: at 40 MHz the PIC18F458 typically draws ~25 mA active, so a 100 mA LDO plus a 1 uF ceramic bulk at each VDD pin and a 10 uF tantalum at the package is recommended. Place the 1 uF caps within 5 mm of pins 11/12 and 31/32 to suppress switching-induced ringing on ADC channels. AVdd must be tied to Vdd with no inductor; a ferrite is acceptable only if the ADC accuracy budget allows the IR drop.
Do not leave the MCLR/Vpp pin floating - it must be tied to VDD through a 10 kohm pull-up with a 100 nF cap to ground for proper in-circuit serial programming. Floating MCLR causes spurious resets during EFT bursts. According to the Microchip datasheet, only Microchip's ICSP programmer can drive the high-voltage Vpp sequence; a generic ISP tool may damage the part if MCLR is incorrectly biased.
The CANTX and CANRX alternate pin functions on RB2 and RB3 must be remapped before the CAN module is enabled. Configure TRISB and the PPS registers per the datasheet timing diagram before initializing the ECAN module, otherwise the CAN peripheral may latch garbage into acceptance filters. Use 100 ohm termination resistors on each end of the CAN bus with a twisted pair, and place the MCP2551 within 50 mm of the MCU.
Place the 40 MHz crystal within 10 mm of OSC1/OSC2 with a guard ring tied to ground, and route the crystal traces over a continuous ground plane. Add 15-22 pF load caps sized to the crystal's CL specification (not 33 pF as in older PIC16 designs). The PLCC-44 socket should be a low-profile machined-pin socket (e.g., Yamaichi IC149-044-*), not a generic stamped socket, to maintain contact reliability over thermal cycles.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade (I suffix, -40 C to +85 C). Not AEC-Q100 qualified - choose PIC18F4585-E variant for AEC-Q100 automotive applications.
