PIC18F16Q40T-I/REB
PIC18F16Q40T-I/REB - 64KB Flash 8-bit MCU, 20-VQFN | Microchip
The Microchip Technology PIC18F16Q40T-I/REB is an 8-bit PIC18 microcontroller IC running at 64 MHz with 64 KB of FLASH program memory (64K x 8), packaged in a 20-pin VQFN (3x3 mm, exposed pad). It belongs to Microchip's PIC18-Q40 family, which targets compact, high-performance real-time control and sensor applications with built-in 12-bit ADC with computation, 8-bit DACs, 16-bit PWMs, DMA, and Configurable Logic Cells (CLC).
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, optimized for deterministic control loops, low power consumption, and small footprint. Within the broader semiconductor hierarchy, the PIC18 sits as an enhanced mid-range family between baseline PIC10/12/16 and the 16-bit dsPIC/PIC24 families, serving applications that need more peripherals and code space than entry-level MCUs but do not justify a Cortex-M0 device. PIC18F16Q40 specifically adds a 12-bit ADC with computation engine, two 8-bit DACs, 16-bit PWMs, DMA, CLC, and Peripheral Pin Select (PPS), positioning it as a strong fit for motor control, lighting, power conversion, and sensor readout designs.
Key features include 64 KB self-programmable Flash, 4 KB SRAM, 512 B EEPROM, 12-bit ADC with computation (ADCC), two 8-bit DACs, multiple 16-bit PWM channels, DMA, CLC, Peripheral Pin Select (PPS) for flexible pin mapping, and Microchip's eXtreme Low Power (XLP) modes for battery-driven designs. Connectivity is provided by I2C, SPI, and UART/USART peripherals, with standard PIC18 interrupt, brown-out reset, and watchdog timer support. The 20-pin VQFN (3x3 mm, REB suffix) package combines a small PCB footprint with an exposed thermal pad, simplifying thermal management and supporting the -40C to +85C industrial temperature range signified by the "I" code.
The "T" suffix in the part number denotes Tape and Reel packaging. The architecture uses Microchip's enhanced mid-range 8-bit core with a 16-bit instruction word, an internal 64 MHz oscillator, and a vectored interrupt controller. The ADCC engine performs averaging, oversampling, and threshold comparisons in hardware, offloading signal conditioning from the CPU and enabling deterministic sensor response in closed-loop applications.
Typical applications include BLDC and brushed motor control, LED lighting and color mixing, switch-mode power supply control loops, sensor signal conditioning with on-chip ADC computation, household appliances, and industrial IoT edge nodes. Its combination of small VQFN footprint and rich peripheral set makes it attractive where PCB area is constrained but analog and PWM resources are critical.
When designing with PIC18F16Q40, leverage Peripheral Pin Select (PPS) to map UART/SPI/I2C pins to convenient locations and use the ADCC hardware features rather than software averaging to reduce CPU load. For low-power designs, use the XLP sleep and Idle modes combined with DMA to wake only on peripheral events.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet alone, helping engineers compare this part against PIC18F15Q41, PIC18F14Q41, and same-family VQFN-pin-compatible Microchip variants.
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