8-bit PIC with CAN — the 5V industrial workhorse
The Microchip PIC18F4580T-I/PT is an 8-bit PIC® 18F microcontroller built around a 40MHz core, packing 32KB of Flash program memory and 1.5KB of RAM. The 4.2V to 5.5V supply range keeps it compatible with legacy 5V industrial rails and 12V-derived regulated supplies common in vehicle environments.
For a design targeting J1939, CANopen, or DeviceNet, this one MCU handles both the application logic and the network interface. The 40MHz core gives enough headroom to run a CAN stack (typically 8-15% CPU load at 250kbps) while still servicing the 11-channel 10-bit ADC, PWM outputs, and UART/SPI/I²C peripherals.
44-TQFP — rework-friendly, but watch the thermal mass
The 44-TQFP package (10x10mm body, 0.8mm pitch) is one of the more forgiving fine-pitch packages under a hot-air station. The leads are visible, so alignment and solder joint inspection are straightforward with a 10x loupe. That said, the TQFP's exposed pad is not a thermal pad — it is a tie bar to the die attach, so do not expect it to wick heat away. The plastic body is MSL 3 typical for this family; if the moisture barrier bag has been open longer than the floor-life window, a 24-hour bake at 125°C before reflow keeps the package from popping.
The base product number PIC18F4580 has been a staple in Microchip's 8-bit lineup for over a decade, and the 'T' reel variant follows the same die. Note the RoHS compliance status: this variant is marked RoHS non-compliant, which may matter for EU or California regulatory filings — verify your exemption or consider the lead-free suffix variant if your compliance officer flags it.
As an active Microchip product with broad distribution, the PIC18F4580T-I/PT is generally available through the independent channel. Lead times for active PIC18 parts typically run 8-16 weeks from Microchip's factory, but independent stock often carries date codes within the last 12 months.