PIC18F8585-E/PT
PIC18F8585-E/PT - 8-Bit 25MHz 48KB Flash MCU 80-TQFP | Microchip
The Microchip Technology PIC18F8585-E/PT is an 8-bit PIC18F-family CMOS flash microcontroller running at up to 25 MHz (E suffix denotes the Extended industrial temperature grade, -40C to +125C), integrating 48 KB of program Flash organized as 24K x 16 words, 3,328 bytes of RAM, and 1,024 bytes of data EEPROM, all in an 80-pin TQFP (12x12 mm) package. The 'E' in the part number denotes the Extended temperature range, and '/PT' is the 80-lead TQFP packaging designator.
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path and Harvard architecture, integrating CPU core, program memory (Flash/ROM), data memory (RAM), non-volatile EEPROM, and a rich set of peripherals including timers, communication interfaces (UART, SPI, I2C), and analog-to-digital converters. PIC18F-series microcontrollers specifically sit in the hierarchy 8-bit MCU -> PIC micro -> microcontroller -> embedded computing -> semiconductor, and use Microchip's enhanced instruction set to deliver up to 10 MIPS at 40 MHz with 16-bit-wide instructions and single-cycle multiply.
Key features of the PIC18F8585-E/PT include a 12-channel 10-bit Analog-to-Digital Converter (ADC) with input multiplexing across up to 68 I/O pins, two Capture/Compare/PWM (CCP) modules plus an Enhanced CCP (ECCP), two USART modules with LIN support, an MSSP port configurable as SPI or I2C (master/slave), a CAN 2.0B module, four 8-bit timers and three 16-bit timers/watchdogs, two analog comparators, and a 16-bit Parallel Slave Port. It supports in-circuit serial programming (ICSP) and in-circuit debug (ICD) via two pins, and operates from 4.2 V to 5.5 V with industrial-grade ESD and latch-up performance.
Architecturally, the device uses an enhanced RISC core with 32-level hardware stack, 8x8 hardware multiplier, and a 16-bit instruction word optimized for deterministic interrupt response and C-compiler code density. The 80-pin TQFP exposes 68 digital I/O lines plus dedicated oscillator, programming, and analog reference pins. Power-managed modes include Run, Idle, and Sleep with multiple wake-up sources, enabling battery-friendly operation.
Typical applications include industrial control with CAN networking, automotive body and chassis ECUs, HVAC and building automation, motor control (BLDC and stepper), instrumentation front-ends, and any embedded design requiring abundant I/O plus on-chip CAN, ADC, and PWM peripherals. Compared with switching regulator solutions, the on-chip ADC and analog comparators avoid external analog front-end ICs in many designs.
When designing with the PIC18F8585-E/PT, use the MPLAB X IDE with the free XC8 compiler and MPLAB Code Configurator (MCC) for peripheral setup. Reserve dedicated pins for MCLR, OSC1/OSC2, AVSS/AVDD, and ensure decoupling capacitors are placed close to the supply pins. The '-E' temperature grade qualifies the part for -40C to +125C operation, distinguishing it from the standard 'I' grade.
This page synthesizes distributor stock and lead-time intelligence, drop-in and pin-compatible alternatives within the same 80-TQFP footprint, and engineering design notes that complement the manufacturer's datasheet to accelerate BOM selection and PCB redesign.
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