PIC18F46Q43-I/P
PIC18F46Q43-I/P - 64KB Flash 8-bit MCU, 40-PDIP | Microchip
The Microchip PIC18F46Q43-I/P is an 8-bit PIC microcontroller from the PIC18-Q43 family, offering 64 KB of Flash, 4 KB of SRAM, and 1 KB of EEPROM in a 40-pin PDIP (DIP-40) through-hole package. It runs up to 64 MHz (16 MIPS) and features a 12-bit Analog-to-Digital Converter with Computation (ADCC), 5-bit DAC, multiple 16-bit PWMs, configurable logic cells (CLC), complementary waveform generator (CWG), and Core Independent Peripherals (CIPs). The "-I" suffix denotes the industrial temperature grade (-40C to +85C).
A PIC microcontroller is a compact, programmable integrated circuit containing a CPU, Flash program memory, RAM, EEPROM data memory, and a rich set of on-chip peripherals such as ADCs, PWMs, timers, and communication interfaces. Within the semiconductor hierarchy, microcontrollers belong to the broader category of microprocessors and embedded controllers. The PIC18 family uses an enhanced 8-bit RISC architecture with hardware multiply, a 31-level stack, and instruction pipelining. Microcontrollers sit at the heart of nearly every embedded system, executing firmware that reads sensors, drives actuators, and communicates with other ICs.
Key differentiating features of the PIC18F46Q43 include: 12-bit ADCC with automatic averaging, filtering and threshold comparison for capacitive touch via CVD; dual-output 16-bit PWM modules on a shared time base; CLCs that allow hardware state-machine customization without CPU intervention; Zero-Cross Detect (ZCD), Windowed Watchdog Timer (WWDT), and CRC/SCAN for functional-safety-class applications. These features collectively shorten firmware development time and reduce bill-of-materials cost.
Architecturally, the device combines a Harvard-bus PIC18 CPU with Direct Memory Access (DMA) and Peripheral Pin Select (PPS), allowing many digital peripherals to be remapped to a wide choice of I/O pins. PPS is invaluable in mixed-signal layouts because it removes pin-out constraints, freeing the PCB designer to place sensitive analog signals and noisy PWM outputs on convenient pins.
Typical applications include industrial control (sensor conditioning, motor drive), home appliances and white goods, capacitive touch user interfaces, LED lighting control with high-resolution dimming, and low-power battery-operated IoT nodes thanks to the eXtreme Low Power (XLP) technology. The 40-PDIP package is preferred in hobby, education, prototyping, and through-hole assembly lines.
When designing with this part, place a 100 nF decoupling capacitor close to each VDD/VSS pair and add a bulk 10 uF capacitor on the main supply. The MCLR pin should be pulled up through a resistor (typically 10 kOhm) and, if long cables are involved, protected by a TVS diode. The ICSP pins (PGx, PGx) must remain accessible for in-circuit programming and debugging.
This page synthesizes distributor pricing, drop-in same-family alternatives, application notes, and design notes not consolidated in the manufacturer datasheet - giving engineers a one-stop reference for PIC18F46Q43-I/P selection and implementation.
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