PIC16LF18444T-I/SO
PIC16LF18444T-I/SO - 32MHz 8-bit MCU, 7KB Flash | Microchip
The Microchip PIC16LF18444T-I/SO is an 8-bit PIC16 microcontroller with 7KB Flash, 512B RAM, and 256B EEPROM, operating up to 32 MHz in a 20-pin SOIC package. The "LF" prefix denotes the low-power "XLP" family variant supporting 1.8 V to 3.6 V supply operation, ideal for battery-powered and energy-harvesting designs. The "T" suffix indicates tape-and-reel packaging, "I" denotes the -40 °C to +85 °C industrial temperature grade, and "SO" refers to the 300-mil SOIC-20 footprint.
An 8-bit microcontroller is a single-chip computer built around an 8-bit data path that integrates a CPU, non-volatile program memory (Flash), volatile data memory (RAM), and peripherals. PIC microcontrollers use a RISC-based Harvard architecture with separate program and data buses, allowing instruction fetch and operand access to occur in the same cycle. The PIC16 family sits between PIC10/PIC12 entry-level parts and PIC18/dsPIC high-performance parts, balancing code density, peripheral richness, and ultra-low power consumption. The "F18444" member extends the legacy PIC16F1 platform with Core Independent Peripherals (CIPs) and Intelligent Analog peripherals, enabling sensor, motor-control, and human-interface applications without burdening the CPU.
Headline features include 12-bit ADC with Computation (ADC2), a 5-bit DAC, two PWM modules, a Complementary Waveform Generator (CWG), comparators, EUSART, SPI, and I2C. Seven KB of self-programmable Flash supports in-application updates, while 256 bytes of EEPROM provide non-volatile user data storage, and 512 bytes of RAM serve runtime variables and stack space. The XLP technology delivers nanoWatt sleep currents, watchdog timer with on-chip LFO, and ultra-low-power wake sources such as RTC and ADC threshold compare.
The architecture combines a 32 MHz internal oscillator with a clock-managed 16 MHz instruction cycle, supporting both INTOSC and external crystal/clock modes via the FOSC configuration bits. The CIPs (CLC, NCO, CWG, PWM, COG) operate autonomously from the CPU, freeing MIPS for application logic. This split of analog/mixed-signal, communications, and timing workloads across dedicated hardware makes the LF18444 well suited to sensor nodes that must minimize bill-of-materials cost while maximizing battery life.
Typical applications include IoT sensor nodes, battery-powered remote controls, low-power wireless sensor transmitters, home appliances with user interfaces, LED lighting controllers, and small motor-driver subsystems. Designers also use this device in wearables, fitness bands, and asset trackers where 1.8 V operation from a single coin cell or two AA cells is mandatory.
A key design consideration is that the 7 KB Flash ceiling and modest RAM limit firmware complexity; consider PIC16F18446 or PIC18 families for richer GUI stacks or RTOS workloads. Decoupling the AVDD/VDD rails with 100 nF + bulk capacitors and following the SOIC-20 thermal layout guidelines keeps ADC noise within datasheet limits.
This page synthesizes distributor pricing, drop-in alternatives within the PIC16LF184xx family, and practical design notes not found in the bare manufacturer datasheet.
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