PIC16F18326T-I/JQ
PIC16F18326T-I/JQ - 8-bit 32MHz 28KB Flash XLP MCU | Microchip
The Microchip Technology PIC16F18326T-I/JQ is an 8-bit PIC microcontroller with 32 MHz CPU speed, 28 KB (16K x 14) of Flash program memory, 2 KB SRAM, and 256 bytes of data EEPROM, housed in a 16-pin UQFN (4x4 mm) package with an exposed pad. It belongs to the PIC16F183xx family featuring eXtreme Low Power (XLP) technology, Core Independent Peripherals (CIP), and Functional Safety (FuSa) capability, and operates from 2.3V to 5.5V across the industrial temperature range of -40C to +85C.
A microcontroller (MCU) is a single-chip computer containing a CPU, memory (Flash/SRAM/EEPROM), and programmable peripherals such as timers, ADCs, and communication interfaces. MCUs sit within the embedded computing hierarchy: microcontroller -> embedded processor -> semiconductor IC. PIC16F18326 adds value by integrating XLP idle/sleep modes, Peripheral Pin Select (PPS), and CIP blocks (CLC, NCO, CWG, CCP, PWM) that offload tasks from the CPU, reducing firmware complexity and active power.
Key features include a 10-bit ADC with up to 11 channels, a 5-bit DAC, two comparators, a 10-bit PWM with complementary waveform generation, and communication peripherals (EUSART, SPI, I2C). PPS remaps digital peripheral pins to I/O without rewiring the PCB. XLP technology delivers nanoWatt sleep currents in the order of tens of nA with retention, suiting energy-harvesting and battery-powered products. CIP blocks such as the Configurable Logic Cell (CLC), Numerically Controlled Oscillator (NCO), and Complementary Waveform Generator (CWG) execute hardware-level tasks, leaving the CPU idle and minimizing firmware footprint.
The 16-pin UQFN (4x4 mm) footprint offers a compact, thermally enhanced layout with an exposed pad that must be soldered for proper dissipation and ground integrity. The "T" suffix denotes Tape & Reel packaging, the "I" denotes the industrial -40C to +85C temperature grade, and "/JQ" specifies the UQFN-16 (4x4) package. The device is qualified to Microchip's Functional Safety (FuSa) standard and supports Class B safety library integration, easing IEC 60730 / UL 1998 compliance for household and appliance applications.
Typical applications include IoT sensor nodes, low-power wireless controllers, home automation, HVAC thermostats, small appliance controls, LED lighting drivers, and battery-powered instruments where code density, peripheral count, and sleep current matter. The combination of 28 KB Flash and 2 KB SRAM should be evaluated against compiled code size; the FuSa + CIP + XLP feature set positions it for safety-critical embedded products.
When designing with this part, dedicate the UQFN exposed pad to a continuous ground pour, place a 100 nF + 1 uF decoupling pair within 2 mm of VDD, and use the PPS routing tool in MPLAB X to assign peripheral pins before laying out the PCB. PPS mappings must be unlocked in firmware before digital peripherals drive their assigned I/O lines.
This page synthesizes distributor pricing, drop-in alternative pinout data, and practical design notes not always covered in the manufacturer datasheet.
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