PIC18F46K20T-I/MV
PIC18F46K20T-I/MV - 8-bit 64MHz 64KB Flash MCU | Microchip
The Microchip Technology PIC18F46K20T-I/MV is an 8-bit PIC18 family microcontroller with 64KB (32K x 16) of Flash program memory, 3.8KB of RAM, and a maximum CPU clock of 64MHz, packaged in a 40-pin UQFN (5x5 mm) with an exposed thermal pad. It belongs to the PIC XLP 18K nanoWatt XLP series, delivering 200 ns instruction execution while supporting low-power operation across a 1.8V to 3.6V VDD range.
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (RAM), peripherals such as timers, A/D converters, and communication interfaces (UART, SPI, I2C), and general-purpose I/O into one package. Within the broader semiconductor hierarchy, an MCU is a sub-class of embedded processor -> microprocessor -> semiconductor device. The PIC18 family uses a RISC Harvard architecture with a 16-bit program word and 8-bit data path, balancing code density with deterministic interrupt handling - qualities that make PIC18 parts a baseline choice for cost-sensitive embedded control, especially in consumer, industrial, and low-power battery applications.
Key features of the PIC18F46K20T-I/MV include 35 digital I/O pins, 14 channels of 10-bit A/D conversion, 2 analog comparators, a hardware ECCP module, MSSP (SPI/I2C) and enhanced USART peripherals, four timers (three 16-bit, one 8-bit), and nanoWatt XLP technology that drives active current down to a few hundred microampere per MHz and sleep current into the sub-microampere region. The internal oscillator is factory calibrated to multiple frequencies up to 64MHz, eliminating the cost of an external crystal in many designs.
Architecturally, the PIC18F46K20 uses a 16-bit modified Harvard bus with a hardware multiply and 8x8 hardware multiply support, two hardware stack levels for context save, and a vectored interrupt controller. The device operates across -40C to +85C industrial temperature range and supports in-circuit serial programming (ICSP) plus in-circuit debugging via Microchip's MPLAB ecosystem.
Typical applications include consumer appliances, low-power remote controls, sensor nodes, battery-powered instrumentation, USB-CDC bridges (using software stack), and industrial control front-ends. The wide operating voltage range makes it well suited for 2-cell battery packs and energy-harvesting systems.
When designing with the PIC18F46K20T-I/MV, ensure the UQFN exposed pad is soldered to a continuous ground plane for thermal dissipation and mechanical reliability. Decouple VDD with 100nF ceramic plus 10uF bulk, and follow Microchip's MPLAB X IDE guidance for configuration bit setting (oscillator, brown-out, watchdog, code protection) before code generation.
This page synthesizes verified distributor pricing, drop-in compatible alternatives from the same Microchip PIC18F K-series family, application patterns, and design considerations not always assembled in the manufacturer datasheet.
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