PIC18LF46K40-E/MV
PIC18LF46K40-E/MV - 64KB Flash 8-bit MCU | Microchip | UQFN-40
The Microchip Technology PIC18LF46K40-E/MV is a low-power, high-performance 8-bit PIC microcontroller with 64KB Flash, 4KB RAM and 256B EEPROM, housed in a 40-pin UQFN (MV) 5x5mm package with exposed thermal pad. It operates up to 64MHz, supports 1.8V to 3.6V supply, and integrates a 10-bit ADC with Computation (ADCC), 5-bit DAC, comparators, PWM, CCP, CWG, HLT, WWDT, SCAN/CRC and ZCD peripherals.
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (RAM), EEPROM for non-volatile data storage, and a rich set of on-chip peripherals (ADCs, timers, communication interfaces, PWM, etc.) into a single IC. In the system hierarchy, an MCU sits between a simple microcontroller and a microprocessor, combining programmability, deterministic real-time response, and low power consumption. PIC18F microcontrollers are part of Microchip's mainstream 8-bit family, with the LF variant denoting an extended low-voltage operating range (1.8V to 3.6V) suited to battery-powered designs.
Key differentiating features include eXtreme Low-Power (XLP) technology with nanoWatt XLP sleep currents as low as 50 nA typical, Core Independent Peripherals (CIPs) such as the Configurable Logic Cell (CLC), Complementary Waveform Generator (CWG), Zero-Cross Detect (ZCD), and 10-bit ADC with Computation (ADCC) that automates Capacitive Voltage Divider (CVD) for advanced touch sensing. The 10-bit ADC supports up to 35 channels on 40-pin parts, enabling direct sensor interfacing without external analog components.
On the architecture side, the device uses an enhanced PIC RISC Harvard-bus core with 16-bit instructions and an 8-bit data path, providing deterministic instruction timing and up to 16 MIPS throughput at 64MHz. Internal oscillators, a wide operating voltage range and integrated voltage reference simplify BOM, while the Peripheral Pin Select (PPS) system allows flexible function-to-pin remapping, reducing PCB layout constraints. The combination of large memory, CIPs, and PPS is engineered for reduced system cost and BOM count.
Typical applications include low-power IoT sensor nodes, capacitive touch user interfaces, battery-powered home automation, automotive body and lighting control modules (the -E suffix denotes the -40C to +125C extended temperature grade), industrial control panels, and consumer appliances where a low pin count yet feature-rich MCU is needed.
When designing with this part, note that the 40-pin UQFN requires careful PCB layout and a thermal pad soldered to the ground plane for thermal dissipation. The -E suffix designates the extended temperature grade (-40C to +125C); the -I grade is industrial (-40C to +85C). The PPS system should be configured early in firmware to lock pin assignments before any peripheral code is written.
This page synthesizes real-time distributor pricing, Microchip's official datasheet, parametric alternatives and practical design notes not found in any single distributor listing, providing a consolidated engineering reference for the PIC18LF46K40-E/MV.
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