PIC18LF458T-I/L - 8-bit MCU 40MHz 32KB Flash w/ CAN 44-PLCC | Microchip
MPN: PIC18LF458T-I/L ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.6 | $8.60 |
| 10 | $8.05 | $80.50 |
| 100 | $7.42 | $742.00 |
| 500 | $6.95 | $3,475.00 |
| 1,000 | $6.4 | $6,400.00 |
PIC18LF458T-I/L Overview
A PIC18 microcontroller belongs to Microchip's enhanced 8-bit PIC family - an 8-bit MCU category that sits between simple 8051 cores and 16/32-bit ARM Cortex-M devices in the embedded hierarchy (PIC18 -> PIC microcontrollers -> 8-bit MCU -> microcontroller -> embedded processor). The 'LF' suffix denotes the low-voltage Flash variant designed for 2.0 V operation, while the 'F458' device integrates the CAN protocol engine that distinguishes it from the non-CAN PIC18F452. The 'T' suffix indicates Tape & Reel packaging, and 'I/L' specifies the industrial temperature range in PLCC.
Key features include 32 KB self-programmable Flash, 1.5 KB SRAM, 256 B EEPROM, 33 digital I/O pins, two analog comparators, two 8/16-bit timer/counters, three 16-bit capture/compare/PWM modules, an 8-channel 10-bit ADC, and an ECAN module supporting CAN 2.0B active/passive. An 8x8 hardware multiplier and a 16-bit instruction path deliver up to 10 MIPS at 40 MHz, while nanoWatt technology with multiple idle/sleep modes enables battery-friendly operation.
The architecture combines a 16-bit instruction word with an 8-bit data path, supports linear program memory addressing up to 2 MB via PSV, and includes prioritized interrupts, hardware stack, and a 4-deep FIFO on the MSSP SPI channel. Self-programmability in the Flash variant makes in-field firmware upgrades practical without external boot memory.
Typical applications include industrial CAN nodes (sensors, motor controllers, building automation), automotive body/comfort modules, HVAC controls, and embedded control boards that require a networkable 8-bit controller with mixed-signal I/O. The wide 2.0-5.5 V range allows direct connection to both 3.3 V and 5 V rails commonly found on legacy industrial backplanes.
When designing with the PLCC-44 variant, allocate a socket or rework allowance for field replacement, observe the parallel master port pin sharing rules during ISP, and place a 0.1 uF ceramic bypass capacitor adjacent to every VDD/VSS pair to keep the internal PLL and CAN transceiver logic quiet. The 'T' suffix denotes Tape & Reel packaging for automated assembly, but engineers typically hand-socket this through-hole-style PLCC part during prototyping.
Drop-in alternatives for PIC18LF458T-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 PIC18LF458T-I/L (same form factor and footprint) — differing in ADC, Package, Mounting Type, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18LF458-I/L
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF452-I/L
✅ Drop-In✓ In Stock
$7.85 / Unit
View Datasheet →PIC18LF448T-I/PT
✅ Drop-In✓ In Stock
$5.32 / Unit
View Datasheet →PIC18LF458T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.5 / Unit
View Datasheet →PIC18LF4580T-I/PT
✅ Drop-In✓ In Stock
$4.32 / Unit
View Datasheet →PIC18LF458T-I/PTG
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18LF458T-I/L Maximum Ratings & Electrical Characteristics
| Core | PIC18 (8-bit Harvard RISC) |
| Instruction Set Width | 16-bit instructions, 8-bit data path |
| Max CPU Clock | 40 MHz |
| MIPS (peak) | 10 MIPS |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 1.5 KB (1536 B) |
| Data EEPROM | 256 B |
| Supply Voltage (Vdd) | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| I/O Pins | 33 |
| ADC | 8 x 10-bit |
| Comparators | 2 |
| Timers (8-bit/16-bit) | 2 x 8/16-bit + 3 x CCP (16-bit) |
| Communication | ECAN 2.0B, I2C, SPI, USART |
| Package | 44-PLCC (J-Lead), 16.59 x 16.59 mm |
| Mounting Type | Surface Mount (PLCC socket or direct) |
| RoHS Status | Compliant |
PIC18LF458T-I/L Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0/AN0 — Digital I/O / Analog input 0 |
| Pin 3 | RA1/AN1 — Digital I/O / Analog input 1 |
| Pin 4 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — Digital I/O / Analog input 4 / SPI slave select |
| Pin 8 | RE0/RD — Digital I/O / Parallel master port read |
| Pin 9 | RE1/WR — Digital I/O / Parallel master port write |
| Pin 10 | RE2/CS — Digital I/O / Parallel master port chip select |
| Pin 11 | VDD — Positive supply voltage |
| Pin 12 | VSS — Ground reference |
| Pin 13 | OSC1/CLKI — Oscillator crystal input / external clock |
| Pin 14 | OSC2/CLKO — Oscillator crystal output / clock out |
| Pin 15 | RC0/T1OSO — Digital I/O / Timer1 oscillator output |
| Pin 16 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| Pin 17 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| Pin 18 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| Pin 19 | RD0/CANTX — Digital I/O / CAN bus transmit |
| Pin 20 | RD1/CANRX — Digital I/O / CAN bus receive |
| Pin 21 | RD2 — Digital I/O |
| Pin 22 | RD3 — Digital I/O |
| Pin 23 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| Pin 24 | RC5/SDO — Digital I/O / SPI data out |
| Pin 25 | RC6/TX/CK — Digital I/O / USART async transmit / clock |
| Pin 26 | RC7/RX/DT — Digital I/O / USART async receive / data |
| Pin 27 | RD4 — Digital I/O |
| Pin 28 | RD5 — Digital I/O |
| Pin 29 | RD6 — Digital I/O |
| Pin 30 | RD7 — Digital I/O |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage |
| Pin 33 | RB0/INT0 — Digital I/O / External interrupt 0 |
| Pin 34 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Pin 35 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Pin 36 | RB3/CCP2 — Digital I/O / CCP2 alternate |
| Pin 37 | RB4 — Digital I/O |
| Pin 38 | RB5 — Digital I/O |
| Pin 39 | RB6/PGC — Digital I/O / ICSP clock |
| Pin 40 | RB7/PGD — Digital I/O / ICSP data |
| Pin 41 | AVSS — Analog ground |
| Pin 42 | AVDD — Analog positive supply |
| Pin 43 | VSS — Ground reference |
| Pin 44 | VDD — Positive supply voltage |
Typical Applications
PIC18LF458T-I/L is suitable for 7 applications: Industrial CAN Node / Sensor Interface, Automotive Body & Comfort Module, HVAC Control Board, Building Automation & Lighting Control, Motor Control & PWM Drive, Industrial Instrumentation & Data Acquisition, Embedded Control Training & Prototyping Platform.
Industrial CAN Node / Sensor Interface
The PIC18LF458T-I/L's integrated ECAN 2.0B controller makes it a direct fit for industrial CAN nodes such as distributed sensors, actuators, and remote I/O modules on CANopen or DeviceNet backbones. The 32 KB Flash handles full CANopen CiA-401 device profiles, while 1.5 KB SRAM buffers PDO messages before forwarding to the application layer. The 8-channel 10-bit ADC reads analog sensor inputs (temperature, pressure, 4-20 mA loop shunts) with 1 LSB = 4.88 mV at 5 V reference, well above typical sensor noise floors. The 2.0-5.5 V range lets a single board accept either 3.3 V or 24 V-derived CAN supply without level shifting.
Recommended
Automotive Body & Comfort Module
The PIC18LF458T-I/L is a long-standing choice for 12 V automotive body modules - door lock controllers, seat position memory, mirror adjustment, and interior lighting nodes - because its 2.0-5.5 V range survives cranking transients after a simple LDO, and the ECAN controller talks directly to the vehicle CAN bus. The 33 I/O pins are sufficient for relay drivers, switch matrix scanning, and PWM-controlled mirror/seat motors via the three 16-bit CCP modules. Industrial -40 to +85 C temperature grade covers cabin environments, and the 1.5 KB RAM absorbs LIN-to-CAN gateway buffering.
Recommended
HVAC Control Board
HVAC control boards for residential and light-commercial equipment rely on the PIC18LF458T-I/L for mixed-signal I/O: the 8-channel 10-bit ADC reads thermistor temperature sensors, the two analog comparators detect zero-crossing on 24 V AC line voltage for triac timing, and the 16-bit CCP modules generate PWM outputs for fan speed and damper motor control. The ECAN block enables the board to join a building automation network for centralized scheduling and remote diagnostics. With 32 KB Flash, full Modbus or CANopen stack fits alongside the application firmware.
Recommended
Building Automation & Lighting Control
DALI, KNX, and BACnet building-automation nodes often use the PIC18LF458T-I/L as a sub-controller bridging a sensor network to a CAN-based backbone. The ECAN module provides robust multi-drop communication across long cable runs in commercial buildings, while the 33 I/O pins drive LED dimmers, occupancy sensors, and relay outputs. The PIC18 nanoWatt sleep modes (down to nanoampere-level idle current) suit battery-backed wireless sensor nodes that wake periodically to push telemetry over CAN.
Recommended
Motor Control & PWM Drive
The PIC18LF458T-I/L drives brushed DC motors, small BLDC fans, and stepper motors via its three 16-bit Capture/Compare/PWM modules, which deliver precise PWM up to 40 MHz time-base resolution. The 8-channel 10-bit ADC samples back-EMF or current-sense shunt voltage for closed-loop speed/torque control, while the ECAN controller reports motor status to a central PLC. The industrial temperature grade supports factory-floor enclosures, and the 2.0-5.5 V range tolerates motor-supply droop during stall events.
Recommended
Industrial Instrumentation & Data Acquisition
Process-control and instrumentation front-ends use the PIC18LF458T-I/L to digitize 4-20 mA analog inputs at up to 8 channels (10-bit resolution), buffer samples in the 1.5 KB SRAM, and forward results over CAN to a SCADA host. The 32 KB Flash holds calibration constants, linearization lookup tables, and Modbus/CANopen protocol stacks. The wide 2.0-5.5 V supply tolerance supports loop-powered 24 V field instrumentation with internal LDO regulation.
Recommended
Embedded Control Training & Prototyping Platform
Universities and design labs favor the PIC18LF458T-I/L for CAN-bus protocol coursework and embedded-control labs because the PLCC-44 form factor accepts a ZIF socket for easy firmware swapping during student sessions. The 32 KB Flash is large enough for full CANopen or DeviceNet stacks, and MPLAB X IDE + XC8 compiler support is mature. The industrial -40 to +85 C grade lets the same platform serve both indoor coursework and outdoor field demonstrations.
Recommended
Recommended Products Summary
Engineering reference data for PIC18LF458T-I/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18LF458-I/L | PIC18LF452-I/L | PIC18LF448T-I/PT | PIC18LF458T-I/PT | PIC18LF4580T-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (J-Lead) | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-TQFP (PT) - different | 44-TQFP (PT) - different | 44-TQFP (PT) - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 (8-bit, 40 MHz) | PIC18 (8-bit, 40 MHz) - same | PIC18 (8-bit, 40 MHz) - same | PIC18 (8-bit, 40 MHz) - same | PIC18 (8-bit, 40 MHz) - same | PIC18 (8-bit, 40 MHz) - same |
| Program Memory (Flash) | 32 KB | 32 KB - same | 32 KB - same | 16 KB - smaller | 32 KB - same | 32 KB - same |
| Data RAM | 1.5 KB | 1.5 KB - same | 1.5 KB - same | 768 B - smaller | 1.5 KB - same | 1.5 KB - same |
| CAN Module | ECAN 2.0B | ECAN 2.0B - same | None - missing | ECAN 2.0B - same | ECAN 2.0B - same | ECAN 2.0B - same |
| ADC | 8 ch x 10-bit | 8 ch x 10-bit - same | 8 ch x 10-bit - same | 8 ch x 10-bit - same | 8 ch x 10-bit - same | 8 ch x 10-bit - same |
| 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 |
| I/O Pins | 33 | 33 - same | 34 - similar | 32 - similar | 32 - similar | 32 - similar |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
Key Differentiators
- Integrated Enhanced CAN 2.0B controller with 32 KB Flash (vs PIC18LF452-I/L)
- PLCC-44 J-lead package for socket-friendly prototyping (vs PIC18LF458T-I/PT)
- 2.0 V to 5.5 V wide supply range including 3.3 V-only rails (vs PIC18F458-I/L (standard 'F' variant))
Design Notes
Place a 0.1 uF ceramic bypass capacitor on each VDD/VSS pair within 5 mm of the IC pin, and a single 10 uF tantalum or aluminum bulk capacitor on the board's main 5 V rail. The PIC18LF458's ADC draws brief charge currents during conversion; without local bypassing the AVDD pin reference will sag by 1-2 LSB. For CAN bus applications, isolate the PIC's VDD from the MCP2551 transceiver's VCC with a ferrite bead to prevent bus-induced supply noise from coupling into the analog reference.
The 44-PLCC J-lead package accepts both through-hole sockets and surface-mount land patterns. For prototyping, use a low-profile PLCC-44 ZIF socket so the chip can be swapped without desoldering. For production, the PLCC J-leads can be hand-soldered or reflowed with a paste stencil - ensure the land pattern uses NSMD pads with 0.5 mm mask expansion. Keep all traces to the crystal oscillator pins (OSC1 / OSC2) under 10 mm in length and surround them with a ground pour to minimize EMI pickup.
Do not enable the on-chip ECAN module without first configuring the CAN I/O pins (CANTX on RD0, CANRX on RD1) as digital inputs; otherwise the CAN bus state during firmware initialization may emit a spurious frame. Also note the 'LF' low-voltage variant operates at full 40 MHz speed only above 4.2 V - below that the Fosc max is 4 MHz. Programming the CONFIG3H register with the wrong IRCFG bits is a common source of mysterious baud-rate errors at 3.3 V. Always re-verify Fosc vs VDD after configuration word changes.
The CAN bus pins (CANTX/CANRX) require a 100 ns propagation delay matching the ISO 11898 standard; do not add series resistors or filter capacitors on these lines because they violate the bus timing budget. Instead, place the MCP2551 transceiver within 50 mm of the PIC and use a twisted-pair bus cable (CANH/CANL) terminated with 120 ohms at each end. For long cables (>10 m) add a common-mode choke to suppress EMI without affecting the differential bus timing.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade (-40 C to +85 C) only - no AEC-Q100 automotive qualification on the 'I/L' variant.
