PIC18F57Q84-I/PT
PIC18F57Q84-I/PT - 8-Bit MCU, 64MHz, 128KB Flash, CAN FD | Microchip
The Microchip Technology PIC18F57Q84-I/PT is an 8-bit PIC18 microcontroller running at 64 MHz with 128 KB (64K x 16) of Flash program memory, housed in a 48-pin TQFP (7x7 mm) package. It belongs to the PIC18-Q84 family, which combines Core Independent Peripherals (CIPs) with CAN FD connectivity for cost-optimized automotive and industrial applications. The integrated CIPs offload tasks such as signal conditioning, timing, and communications from the CPU, enabling deterministic real-time control with minimal firmware overhead.
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash, SRAM, EEPROM), and programmable peripherals. PIC18 8-bit MCUs use Microchip's enhanced Harvard RISC architecture with 16-bit instructions and an 8-bit data path, balancing code density with deterministic interrupt response. The PIC18-Q84 sub-family specifically extends this lineage with modern interfaces (CAN FD, UART, SPI, I2C) and high-resolution CIPs suited to sensor and motor control nodes.
Key specifications include 128 KB Flash, 8 KB SRAM, 1024 bytes EEPROM, 64 MHz internal oscillator, and 12-bit ADC with computation (ADCC). Communication peripherals include one CAN FD module, two UARTs, two SPIs, and two I2Cs. Core Independent Peripherals include configurable logic cells (CLC), signal measurement timer (SMT), complementary waveform generator (CWG), numerically controlled oscillator (NCO), and zero-cross detect (ZCD). A hardware crypto engine, cyclic redundancy check (CRC) module, and direct memory access (DMA) controller further reduce CPU load.
The architecture uses a 16-bit instruction word with an 8-bit data bus, supports up to 16 MIPS at 64 MHz, and operates from 1.8 V to 5.5 V. The 48-pin TQFP (PT) package offers up to 44 I/O pins with high-current sink/source capability, plus peripheral pin select (PPS) for flexible signal routing. The device is qualified for industrial temperature ranges (-40 °C to +85 °C) and supports in-circuit serial programming (ICSP) and in-circuit debugging (ICD).
Typical applications include CAN FD nodes in automotive body and chassis ECUs, industrial sensor hubs, BLDC motor controllers, HVAC control boards, lighting controllers, and battery management front-ends. The combination of CAN FD, 12-bit ADCC, and CWG enables sensor-driven closed-loop control with hardware-accelerated timing without burdening the CPU.
When designing with this device, plan for adequate decoupling (100 nF ceramic per VDD pair), a low-ESR bulk capacitor on VDDCORE, and routing of the CAN bus with 120 Ω termination plus ESD protection. For safety-critical applications, enable the WWDT and use the CRC scanner to validate Flash contents at startup.
This page synthesizes distributor pricing, drop-in family alternatives from the Site MPN list, and practical design guidance not duplicated on the manufacturer datasheet, giving procurement and design engineers a faster path from specification to qualified source.
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