PIC18LF4580T-I/PT
PIC18LF4580T-I/PT - 8-bit PIC MCU, 32KB Flash, 40MHz, 44-TQFP
The Microchip Technology PIC18LF4580T-I/PT is a low-voltage, 8-bit PIC18 microcontroller featuring 32KB of Flash program memory, 1536 bytes of SRAM, and 256 bytes of EEPROM, all housed in a 44-pin TQFP (10x10 mm) package. Operating from a 2.0V to 5.5V supply, the device executes instructions at up to 10 MIPS from a 40 MHz oscillator and integrates a 10-bit ADC with up to 13 channels, a CAN 2.0B controller, an ECAN module, and the nanoWatt Technology power-management feature set. The 'T' suffix indicates tape-and-reel packaging and the 'I' suffix denotes the industrial -40C to +85C operating temperature range.
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and configurable peripherals. The PIC18 family is Microchip's high-performance 8-bit architecture, positioned between the cost-optimized PIC16 family and the 16-bit dsPIC/PIC24 families. PIC18 MCUs typically include a hardware multiplier, prioritized interrupt controller, and a modified Harvard bus that lets the CPU read program memory as data through a table-read mechanism. They target embedded control applications that need deterministic response, low power, and a rich peripheral set without the cost of an ARM Cortex-M part.
Key features of the PIC18LF4580T-I/PT include 36 digital I/O pins, dual USART, MSSP (SPI/I2C), a parallel slave port, CTMU for capacitive touch or general current-source measurement, and nanoWatt Technology modes (Idle, Sleep, Low-Power Sleep, and Deep Sleep) that drop quiescent current below 1 uA in deep sleep. The 'LF' variant targets low-voltage 2.0V operation, whereas the standard PIC18F4580 requires 4.2V minimum VDD; both share the same instruction set, peripheral set, and pinout, simplifying migration.
The ECAN controller implements CAN 2.0B active with hardware acceptance filters, time-stamping, and multiple buffers, which is unusual at this price point and makes the part a strong fit for industrial networking. The 10-bit ADC supports up to 13 input channels with automatic acquisition and a 100 ks/s aggregate throughput, while CTMU enables capacitive-touch keypads, temperature measurement with a thermistor, or precision timing.
Typical applications include CAN-based industrial automation, automotive body and chassis ECUs, building automation nodes, HVAC controllers, and small embedded control boards where 32KB of Flash and ECAN communication outweigh the need for a 32-bit core. The TQFP-44 package suits hand-solderable prototypes and surface-mount production lines alike.
When designing with this part, configure the CONFIG words in MPLAB X IDE for the target oscillator and required peripherals, and always hold MCLR high through a 10 kohm pull-up. Decouple VDD/VSS with a 100 nF ceramic capacitor placed within 5 mm of each pin pair.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not found on any single manufacturer or distributor page, giving engineers and buyers a single reference for the PIC18LF4580T-I/PT.
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