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PIC18LF27K42-I/SO - 8-bit 64MHz 128KB Flash XLP MCU | Microchip
PIC18LF27K42-I/SO

PIC18LF27K42-I/SO - 8-bit 64MHz 128KB Flash XLP MCU | Microchip

The Microchip Technology PIC18LF27K42-I/SO is an 8-bit PIC18 XLP microcontroller featuring a 64 MHz CPU, 128 KB Flash program memory, 8 KB SRAM and 1 KB EEPROM, packaged in a 28-pin SOIC. The 'LF' prefix designates the low-power (1.8 V–3.6 V) variant of the PIC18(L)FxxK42 family, and the 'I/SO' suffix denotes the industrial temperature range (-40 °C to +85 °C) and 28-lead SOIC surface-mount package. An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating a CPU, RAM, non-volatile program memory (Flash), EEPROM data memory, and peripherals such as ADC, timers, UART, SPI and I2C. MCUs belong to the broader class of microcontrollers, which sit within embedded processors and, ultimately, the wider semiconductor device hierarchy. The 'XLP' (eXtreme Low Power) designation indicates that this PIC18 family was designed for battery-powered applications, with nanoWatt sleep modes and active-mode currents in the microamp range. Key features of the PIC18LF27K42 include 25 general-purpose I/O pins, a 12-bit differential ADC with computation (ADC2), up to four 8-bit DAC outputs, multiple PWM/Capture/Compare peripherals, two I2C/SPI and one UART module, and Core Independent Peripherals (CIPs) such as CLC, NCO and DMA-friendly signal routing. The high-precision 32 MHz internal oscillator and PLL enable operation up to 64 MHz without an external crystal. CIPs allow complex timing, logic and waveform generation without CPU intervention, reducing active time and total energy. Architecturally, the PIC18LF27K42 uses a Harvard-class 8-bit RISC core with a hardware multiplier and a 31-level stack. A built-in CRC with memory scan supports IEC 60730 class-B safety software in household appliances. The K42 family adds a 12-bit differential ADC2 with averaging, oversampling and hardware accumulation, significantly simplifying sensor acquisition firmware. Typical applications include IoT sensor nodes, low-power wireless remotes, white-goods and appliance control, lithium-battery medical wearables, automotive body and lighting subsystems (non-Automotive-AEC-Q100 variant), and small motor-control or fan-control boards. When designing with this device, place the 0.1 µF VDD decoupling capacitor within 5 mm of each VDD/SS pin pair, and use the internal LDO plus brown-out reset rather than an external supervisor to minimise BOM. This page synthesises distributor pricing, same-package alternatives and design considerations not found in the manufacturer datasheet alone.

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PIC18LF27K42-I/SS - 128KB Flash XLP 8-bit MCU 28-SSOP
PIC18LF27K42-I/SS

PIC18LF27K42-I/SS - 128KB Flash XLP 8-bit MCU 28-SSOP

The Microchip Technology PIC18LF27K42-I/SS is an 8-bit PIC® XLP™ 18K microcontroller featuring 128KB Flash, 8KB SRAM, and 1KB EEPROM, operating up to 64MHz from a 1.8V to 3.6V supply in a 28-pin SSOP (0.209 inch / 5.30mm width) surface-mount package. What is a low-power 8-bit microcontroller? An MCU (microcontroller unit) is a single-chip computer integrating CPU core, Flash program memory, SRAM, EEPROM, and configurable peripherals. The PIC18 family uses an enhanced Harvard architecture with a RISC-style instruction set, and the XLP (eXtreme Low Power) designation marks devices engineered for sub-microampere sleep currents and fast wake-up. Within Microchip's taxonomy, the K42 series adds Core Independent Peripherals (CIPs) such as CLC, NCO, and PWM that operate without CPU intervention, easing real-time firmware development and allowing the core to remain in sleep for the majority of the duty cycle. Key features include the 64MHz internal oscillator, 12-bit differential ADC2 with computation, multiple communication interfaces (UART, SPI, I2C), 25 I/O pins, vectored interrupts, DMA, MAP, DIA, DAC, comparators, and PWM peripherals on-chip. The "LF" prefix indicates a wide VDD range of 1.8V to 3.6V optimized for battery operation, while the "F" variants run from 2.3V to 5.5V. The 128KB Flash (64K x 16) supports self-programming and large protocol stacks, while 1KB EEPROM supports 100K+ write-cycle endurance for parameter storage. The PIC18LF27K42 architecture pairs the enhanced mid-range core with vectored interrupts, a hardware multiplier/divider, and DMA channels that move data between peripherals and RAM without CPU cycles. CIP blocks (CLC, NCO, PWM, ADC-with-computation) enable deterministic peripheral chains that run independently of the CPU, allowing the core to sleep for the majority of the duty cycle and wake only on interrupt events. This combination directly enables sub-uA average power budgets typical of energy-harvesting and battery-powered IoT designs. Typical applications include battery-powered IoT sensor nodes, wearable fitness and medical devices, low-power wireless sensor hubs, mixed-signal instrumentation, and small home appliances. The wide VDD range and low sleep current also suit remote controls, electronic shelf labels, and energy-harvesting designs where quiescent draw dominates battery life. When designing with this device, plan to leverage the DMA plus CIP combination to keep the CPU in sleep mode as long as possible, and budget the 1KB EEPROM carefully for write-cycle endurance. Verify the 28-SSOP pinout against your board layout - the SSOP is 5.30mm wide with 0.65mm pitch and shares a footprint pattern with the F-variant and other PIC18 28-pin SSOP devices. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet - specifically the side-by-side LF-versus-F voltage range comparison, the automotive FA-{D} qualifier note, and the SSOP-versus-SO footprint tradeoff guidance.

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PIC18LF27K42T-I/SS - 64MHz 8-bit XLP MCU, 128KB Flash | Microchip
PIC18LF27K42T-I/SS

PIC18LF27K42T-I/SS - 64MHz 8-bit XLP MCU, 128KB Flash | Microchip

The Microchip Technology PIC18LF27K42T-I/SS is an 8-bit PIC18 microcontroller built on the eXtreme Low Power (XLP) platform, delivering 64 MIPS performance from a 64 MHz internal oscillator and packaged in a 28-pin SSOP (SS) form factor with 128 KB of Flash program memory and 8 KB of SRAM. The 'LF' variant operates across a 1.8 V to 3.6 V supply range, while the 'T' suffix denotes Tape and Reel packaging and 'I/SS' denotes the industrial temperature grade (-40C to +85C) in SSOP-28. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), non-volatile EEPROM, and a set of on-chip peripherals such as ADC, timers, communication interfaces, and general-purpose I/O. The PIC18 family sits in Microchip's high-performance 8-bit tier, bridging simple PIC10/PIC12/PIC16 designs and the 16-bit dsPIC/PIC24 families. MCUs in this class are typically used to sense, control, and communicate in embedded products across consumer, industrial, and automotive markets. Key features include 128 KB Flash (64K x 16 words), 8 KB SRAM, 1 KB EEPROM, a 12-bit ADC with computation (ADC2) and automated channels, a 5-bit DAC, configurable logic cells (CLC), multiple PWM modules, vector interrupts, DMA, and Core Independent Peripherals (CIP) that offload tasks from the CPU. The XLP architecture delivers nanoWatt sleep currents and a typical IDD of a few microamps in deep sleep, making the part suitable for battery-powered applications. Architecturally, the PIC18LF27K42 uses a 16-bit instruction word with an 8-bit data path, 31-level hardware stack, and a 4x PLL-locked 16 MHz HFINTOSC that supports 64 MHz operation. On-chip peripherals are routed through the Peripheral Pin Select (PPS) system, allowing flexible remapping of digital functions to physical I/O pins without changing the firmware. Typical applications include low-power IoT sensor nodes, battery-powered instrumentation, USB-to-UART bridges (using the PPS-mappable UART), home appliance control panels, lighting controllers, and small motor-control loops. Its 1 KB EEPROM and rich analog peripherals also make it useful for handheld medical consumables and factory sensor hubs. When designing with this MCU, the LF (low-Voltage F) variant's 1.8 V minimum is mandatory for 2x AA battery stacks; switch to the standard PIC18F27K42 (2.7 V to 5.5 V) if your rail is regulated 5 V. Decoupling requires a 100 nF next to each VDD/VSS pair plus a bulk 10 uF; unused I/O must be configured as outputs low to avoid floating-pin current. This page synthesizes distributor pricing for the PIC18LF27K42T-I/SS, drop-in alternatives in the same SSOP-28 footprint, and design notes derived from Microchip's XLP guidance not collated on any single distributor page.

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PIC18LF4220-I/ML - 8-bit PIC MCU, 4KB Flash, 44-QFN | Microchip
PIC18LF4220-I/ML

PIC18LF4220-I/ML - 8-bit PIC MCU, 4KB Flash, 44-QFN | Microchip

The Microchip Technology PIC18LF4220-I/ML is an 8-bit PIC18 RISC microcontroller with 4KB of Flash program memory, 512 bytes of SRAM, and 256 bytes of EEPROM, housed in a 44-pin QFN package with an exposed thermal pad. It supports an extended operating voltage range from 2.0V to 5.5V, qualifying the 'LF' low-voltage family for battery-backed designs and regulated 3.3V rails. An 8-bit PIC microcontroller is a Harvard-architecture RISC device that fetches instructions and data through separate buses, allowing single-cycle instruction execution. The PIC18 family sits at the high-performance tier of Microchip's 8-bit MCU portfolio and is positioned hierarchically as: PIC18 -> PIC MCU -> 8-bit microcontroller -> microcontroller -> embedded processor. The 'LF' family designation specifically denotes the low-voltage, low-power variant optimized for applications where VDD is supplied directly from a battery or a low-headroom regulator. Key features of the PIC18LF4220 include a 16-bit instruction word with an 8-bit data path, an internal 32 kHz to 8 MHz oscillator block, a 10-bit ADC with up to 13 input channels, and three timers plus a Capture/Compare/PWM (ECCP) module. The device supports ICSP (In-Circuit Serial Programming) for in-field firmware updates and self-programmability for bootloader-based upgrades. I/O count is 36, providing generous GPIO for keypad, display, and sensor interfacing without external expanders. Architecturally, the PIC18LF4220 employs an enhanced RISC core capable of 10 MIPS at 40 MHz and integrates nanoWatt Technology power management with Idle and Sleep modes that drop quiescent current to microamp levels. The peripheral set is the same as the legacy PIC18F4220, providing a low-power migration path without firmware changes. The QFN-44 package with exposed pad improves thermal dissipation versus equivalent QFP packages, supporting sustained operation in enclosed industrial housings. Typical applications include industrial control panels, sensor-conditioning front-ends, battery-powered metering, USB HID peripherals with PIC18-to-USB bridging, and appliance user-interface boards. The wide voltage range permits direct operation from 2xAA cells without an LDO, simplifying Bill-of-Materials in cost-sensitive designs. Designers should confirm programmer/debugger compatibility (ICD 3, PICkit 4) before committing, and review the device errata sheet for any ADC or oscillator deviations on early silicon revisions. This page synthesizes distributor pricing tiers, drop-in 8-bit MCU alternatives in the same QFN-44 footprint, and practical design notes not aggregated on individual distributor listings.

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PIC18LF4220-I/PT - 8-bit 40MHz MCU 4KB Flash 44-TQFP | Microchip
PIC18LF4220-I/PT

PIC18LF4220-I/PT - 8-bit 40MHz MCU 4KB Flash 44-TQFP | Microchip

The Microchip Technology PIC18LF4220-I/PT is a high-performance 8-bit PIC18 microcontroller delivering 40 MIPS operation from a 4 KB (2K x 16) enhanced Flash program memory in a 44-pin TQFP (10x10 mm) package. It features 512 bytes of RAM, 256 bytes of EEPROM, 36 digital I/O pins, and a 13-channel 10-bit ADC with nanoWatt Technology for low-power applications. A PIC microcontroller (Programmable Interface Controller) is a RISC-based embedded computing device that integrates a CPU, non-volatile Flash program memory, RAM, EEPROM data memory, and peripherals such as ADC, timers, UART, I2C, and SPI into a single chip. The PIC18 family sits in Microchip's 8-bit mid-range line, above the baseline PIC10/PIC12/PIC16 families, offering higher performance, C-friendly architecture, and richer peripherals. PIC MCUs form part of the broader microcontroller hierarchy: microcontroller -> embedded MCU -> semiconductor IC. Key features include a wide 2.0V to 5.5V operating range (the "LF" prefix indicates low-voltage operation suitable for battery-powered designs), an enhanced 8-bit CPU core with hardware multiplier, 1us hardware ADC conversion, up to 10 MIPS at 3V, four timers (Timer0/Timer1/Timer2/Timer3), enhanced USART, MSSP for SPI/I2C, and nanoWatt power management with multiple sleep modes. The 44-TQFP package offers gull-wing leads for surface-mount assembly and a square 10x10 mm body suitable for moderate-density designs. Architecture-wise, the PIC18LF4220 uses a 16-bit instruction word with an 8-bit data path, a 32-level hardware stack, and Harvard memory architecture separating program and data buses. This dual-bus design allows simultaneous instruction fetch and data access, enabling 40 MHz / 10 MIPS throughput. The enhanced Flash supports self-programming and ICSP (In-Circuit Serial Programming) for field upgrades. Typical applications include industrial control panels, sensor interfaces with 10-bit ADC precision, low-power battery-powered instruments, building automation, HVAC controllers, and USB/serial human-interface devices. The 10-bit ADC provides adequate resolution for temperature, pressure, and analog signal acquisition. When designing with this MCU, ensure decoupling capacitors (100 nF) are placed close to VDD/AVDD/VSS pins and that MCLR is properly pulled up. The device supports ICD (In-Circuit Debugger) via the ICSP interface for development. The PIC18LF4220 is now in Microchip's mature lifecycle phase, so confirm long-term availability before high-volume deployment. This page synthesizes distributor pricing, drop-in alternative listings from Microchip's same-family cross-reference and complementary part cross-reference, datasheet-derived specifications, and practical design notes not consolidated on the manufacturer product page.

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PIC18LF4220T-I/ML - 4KB Flash 8-bit MCU 44-VQFN | Microchip
PIC18LF4220T-I/ML

PIC18LF4220T-I/ML - 4KB Flash 8-bit MCU 44-VQFN | Microchip

The Microchip Technology PIC18LF4220T-I/ML is a high-performance, enhanced Flash 8-bit microcontroller in the PIC18F family, delivering 4 KB of program Flash memory, 512 bytes of RAM, and 256 bytes of EEPROM in a 44-pin VQFN package with exposed thermal pad. It operates up to 40 MHz at 5 V and supports 36 digital I/O lines, a 10-bit ADC with up to 13 input channels, plus nanoWatt Technology power management. The 'LF' prefix denotes an extended low-voltage core (2.0 V to 5.5 V) optimized for battery and energy-harvesting applications. An 8-bit PIC microcontroller is a RISC-based single-chip computer that integrates CPU core, Flash program memory, RAM, EEPROM, peripherals, and I/O on one die. Within the broader taxonomy it sits as a microcontroller -> embedded controller -> semiconductor -> integrated circuit. The PIC18 family specifically uses a 16-bit instruction word with 8-bit data path and a modified Harvard architecture, delivering deterministic instruction timing and an interrupt structure suitable for real-time embedded control. Key features include 4 KB self-programmable Flash, 512 bytes SRAM, 256 bytes data EEPROM, hardware USART, MSSP (SPI/I2C), a 10-bit ADC, two 8-bit and one 16-bit timer, and nanoWatt power-saving modes (Idle, Sleep, Run modes) with on-board low-power Timer1 oscillator. The 44-VQFN exposed pad package is specified to 8x8 mm with 0.65 mm pitch for compact SMD layouts, and the -I temperature grade covers the industrial -40C to +85C range. Typical applications include industrial sensor nodes, low-power remote controls, small appliance controllers, HVAC interface boards, battery-backed instrumentation, USB HID firmware (with companion parts), and consumer white-goods main boards. The wide voltage range and nanoWatt modes make this part attractive for energy-constrained designs. When designing with this device, ensure the exposed thermal pad is soldered to a sufficiently large copper pour for mechanical and thermal performance; missing this connection reduces power dissipation capability and can violate the solder-joint reliability spec. The wide VDD range simplifies direct battery connection without external LDO stages. This page synthesizes verified distributor pricing, drop-in replacement options, and engineering design notes drawn from manufacturer documentation, providing information not assembled on any single distributor or manufacturer page.

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PIC18LF4220T-I/PT - 8-bit MCU 4KB Flash 36 I/O | Microchip
PIC18LF4220T-I/PT

PIC18LF4220T-I/PT - 8-bit MCU 4KB Flash 36 I/O | Microchip

The Microchip Technology PIC18LF4220T-I/PT is a low-voltage 8-bit microcontroller in the PIC18F family featuring 4KB of Flash program memory, 512 bytes of SRAM, 256 bytes of EEPROM, and 36 digital I/O pins, packaged in a 44-pin TQFP (PT) footprint with a maximum clock frequency of 40 MHz and an operating supply range of 2.0 V to 5.5 V. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), working memory (RAM), non-volatile data memory (EEPROM), and a configurable set of peripherals (ADC, timers, communication ports, I/O). Within the broader semiconductor hierarchy, an MCU belongs to the category of microcontrollers, which sit under microprocessors and embedded processors, which themselves are a subset of logic and computing ICs. The PIC18 family uses an enhanced Harvard RISC architecture with a 16-bit instruction word and an 8-bit data path, executing most instructions in a single cycle. Key features include a 10-bit ADC with up to 13 channels, nanoWatt power management with multiple low-power modes (Sleep, Idle, Run), four timer modules (Timer0/1/2/3), two capture/compare/PWM modules, an enhanced USART, an MSSP peripheral that supports SPI and I²C, and a programmable watchdog timer with its own on-chip RC oscillator for maximum reliability. The 'LF' prefix designates the low-voltage variant of the PIC18F4220, identical in die and pinout but optimized for operation down to 2.0 V, suitable for battery-powered designs. The device is built on Microchip's enhanced FLASH self-programming architecture, allowing field firmware upgrades without external programming voltage. The 'T' suffix indicates tape-and-reel packaging for high-volume assembly. Typical applications include industrial control nodes, low-power sensor interfaces, HVAC thermostat controllers, battery chargers, LED lighting controllers, and consumer appliance subsystems. The 2 V minimum supply and nanoWatt Sleep current (typically under 100 nA with peripherals disabled) make this device well suited for portable and energy-harvesting designs. When designing with this MCU, ensure the ICSP (In-Circuit Serial Programming) pins PGC/PGD are accessible on the PCB to allow firmware updates in production. Decouple VDD/VSS with a 100 nF ceramic placed within 5 mm of the pins, and route MCLR through a 10 kΩ pull-up unless the configuration register disables this pin.

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PIC18LF4221-I/ML - 8-Bit MCU, 40MHz, 4KB Flash, 44-QFN | Microchip
PIC18LF4221-I/ML

PIC18LF4221-I/ML - 8-Bit MCU, 40MHz, 4KB Flash, 44-QFN | Microchip

The Microchip Technology PIC18LF4221-I/ML is an 8-bit PIC18F-family microcontroller (MCU) running up to 40 MHz, equipped with 4 KB (2K x 16) of Flash program memory and 512 bytes of RAM, housed in a 44-pin QFN (8x8 mm) package with an exposed thermal pad (ML). The 'LF' prefix denotes the wide-voltage variant operating from 2.0 V to 5.5 V, making the part suitable for both battery-powered and 5 V regulated rails. A microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory and programmable peripherals. The PIC18F architecture is an enhanced 8-bit Harvard RISC core with hardware multiply, prioritized interrupt controller and a 16-bit instruction word that improves code density versus older PIC16 cores. Within the broader taxonomy, PIC18F MCUs sit between the smaller PIC16F parts and the 16-bit PIC24/dsPIC families. Key features of the PIC18LF4221 include 10-bit ADC, multiple timers (Timer0/Timer1/Timer2/Timer3), enhanced CCP, MSSP (SPI/I2C) and AUSART serial interfaces, a 10-bit PWM module, internal 32 kHz to 8 MHz oscillator calibration, and nanoWatt Technology power management. The exposed-pad QFN-44 package (JEITA/EIAJ HVQCCN) provides a thermal pad for improved theta-JA, while the 8x8 mm body keeps the board footprint compact for space-constrained designs. In-circuit debugging is supported through two I/O pins (PGM/PGC) and the ICSP interface, allowing MPLAB ICD programmers and debuggers to flash and step the device without removing it from the board. The combination of self-programmability, robust 2.0-5.5 V operation and rich peripheral set makes the part attractive for both consumer and industrial embedded designs. Typical applications include USB-human-interface-device-class peripherals when paired with an external PHY, low-cost sensor hubs for industrial monitoring, white-goods and appliance control boards, automotive interior lighting and HVAC controls, and handheld instrumentation displays. The wide voltage range also enables direct Li-Ion or 2x AA battery operation in portable products. When designing, ensure the QFN exposed pad is soldered to a copper pour of at least 1 square inch to meet theta-JA for full industrial-temperature (-40C to +85C) operation. Decoupling must include a 100 nF X7R within 2 mm of VDD and a bulk 10 uF on the main rail; decoupling the AVDD pin separately prevents ADC noise on the digital supply. This page consolidates distributor live-stock signals, drop-in 44-QFN pin-compatible alternatives within the PIC18 LF family, and design notes (thermal pad, decoupling, ICSP) not always obvious from a quick datasheet skim.

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PIC18LF4221-I/PT - 8-Bit 40MHz 4KB Flash MCU | Microchip TQFP-44
PIC18LF4221-I/PT

PIC18LF4221-I/PT - 8-Bit 40MHz 4KB Flash MCU | Microchip TQFP-44

The Microchip Technology PIC18LF4221-I/PT is an 8-bit PIC18F-family RISC microcontroller running at up to 40 MHz with 4 KB of Flash program memory and 512 bytes of RAM, housed in a 44-pin TQFP (10x10 mm) package. It integrates 34 I/O lines, an enhanced 10-bit ADC, and the standard PIC18 peripheral set including UART, SPI, and I2C interfaces, designed for industrial high-performance applications. The 'LF' prefix denotes the wide-voltage VDD range of 2.0 V to 5.5 V needed for low-power and battery-backed designs. An 8-bit microcontroller is a single-chip computer built around an 8-bit data path; it sits in a hierarchy that runs MCU -> 8-bit MCU -> embedded controller -> semiconductor. PIC18F devices add a 16-bit instruction word to an 8-bit data path, enabling linear addressing and higher code density than the legacy PIC16 family. Compared with 32-bit Cortex-M parts, 8-bit MCUs trade raw throughput for cost, deterministic interrupt latency, and decades of compiler/ecosystem support. Key features include 40 MHz operation (10 MIPS), 4 KB Flash with 2K x 16 organization, 512 bytes of RAM, 34 digital I/O pins, 10-bit ADC with multiple channels, two analog comparators, two 8-bit and three 16-bit timers, and the nanoWatt Technology power management set for low-power sleep modes. The wide 2.0 V to 5.5 V supply range allows the part to run directly from a single Li-ion cell or from a regulated 3.3 V or 5 V rail without level shifting. The device uses the proven PIC18 RISC architecture with a 16-bit instruction word and an 8-bit data bus, supported by the MPLAB XC8 toolchain and a complete family header-library ecosystem. Internal oscillator options, an integrated programmable brown-out reset, and a hardware watchdog provide design robustness without external components. The device operates across the industrial -40C to +85C temperature range with at least 100K erase/write cycles on Flash. Typical applications include industrial control subsystems, consumer white-goods user interfaces, sensor signal conditioning nodes, low-power remote controls, USB-less human-interface peripherals, and battery-powered data loggers. The wide voltage and small footprint make the part a drop-in replacement choice when migrating from older PIC16 designs that need more code space than the previous generation could host. When designing with the PIC18LF4221-I/PT, place a 100 nF decoupling capacitor as close as possible to the VDD pin and keep the MCLR pull-up trace short. Verify oscillator start-up margin at the lowest expected VDD if you rely on the internal HFINTOSC, since low-voltage start-up behavior depends on both temperature and the configured clock mode. This page synthesizes distributor stock and pricing, a verified drop-in list, and design notes not found in the manufacturer datasheet to give engineers a single decision-ready reference for the PIC18LF4221-I/PT.

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PIC18LF4221T-I/ML - 8-bit PIC MCU, 4KB Flash, 44-QFN | Microchip
PIC18LF4221T-I/ML

PIC18LF4221T-I/ML - 8-bit PIC MCU, 4KB Flash, 44-QFN | Microchip

The Microchip PIC18LF4221T-I/ML is a low-power 8-bit PIC18 microcontroller built on a RISC architecture, integrating 4 KB of Flash program memory and 512 bytes of RAM in a 44-pin QFN (8x8 mm) package. It operates at up to 40 MHz, delivers 10 MIPS performance, and runs from a wide 2.0V-5.5V supply, making it suitable for both 3.3V and 5V system designs. The 'LF' prefix designates the low-voltage, low-power variant of the PIC18F4221 family. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, Flash program memory, SRAM data memory, EEPROM, and a rich set of peripheral interfaces. The PIC18 family uses a 16-bit instruction word with an 8-bit data path, positioned in the hierarchy as: PIC18 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. This category targets applications that need deterministic real-time performance, ultra-low standby power, and a mature toolchain. Key features of the PIC18LF4221T-I/ML include 10-bit ADC channels with multiple acquisition options, enhanced CCP (Capture/Compare/PWM) modules, USART with LIN support, MSSP for SPI/I2C, nanoWatt Technology for ultra-low power sleep modes, and a 10 MHz internal oscillator. The 44-QFN (ML) package provides a small 8x8 mm footprint with an exposed thermal pad, ideal for space-constrained board layouts. Typical applications span industrial control panels, low-power sensor nodes, handheld instrumentation, consumer white goods, and automotive body modules. The wide operating temperature range of -40C to +85C (industrial grade) suits both indoor and moderately harsh environments. The 'T' suffix indicates Tape and Reel packaging for high-volume SMT assembly. When designing with this device, ensure decoupling capacitors are placed within 2 mm of VDD pins and that the exposed thermal pad is soldered to a sufficient copper pour for heat dissipation. Use MPLAB X IDE with XC8 compiler and pickit or ICD programmers for development; the nanoWatt sleep modes can drop quiescent current below 1 uA for battery-powered designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.

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PIC18LF4320-I/P - 8KB Flash 8-bit MCU | Microchip Technology
PIC18LF4320-I/P

PIC18LF4320-I/P - 8KB Flash 8-bit MCU | Microchip Technology

The Microchip Technology PIC18LF4320-I/P is an 8-bit high-performance RISC microcontroller with 8KB of Flash program memory and 512 bytes of RAM, housed in a 40-pin PDIP (Plastic Dual In-line Package) for through-hole designs. It operates at up to 10 MIPS from a wide 2.0V to 5.5V supply, making it suitable for both 3.3V and 5V systems while integrating nanoWatt power management for ultra-low-power applications. An 8-bit PIC microcontroller belongs to the family of modified Harvard-architecture microcontrollers, characterized by separate program and data memory buses, an instruction set optimized for single-cycle execution, and integrated peripherals such as ADC, timers, and communication interfaces. Within the broader semiconductor hierarchy, 8-bit MCUs sit below 16-bit and 32-bit MCUs in computational capability but excel in cost-sensitive, deterministic, low-power embedded applications such as appliance control, sensor interfacing, and industrial monitoring. Key features of the PIC18LF4320-I/P include a 10-bit Analog-to-Digital Converter (ADC) with up to 13 input channels, 36 digital I/O pins, an Enhanced Capture/Compare/PWM (ECCP) module, two 8-bit timers plus three 16-bit timers, and multiple communication interfaces including USART, MSSP (SPI/I2C), and a parallel port. The nanoWatt technology provides multiple power-managed operating modes (Run, Idle, Sleep, and a secondary oscillator for real-time clock operation), enabling extended battery life in portable designs. The device uses an enhanced PIC18 instruction set with 77 single-word instructions and a hardware 8x8 multiplier for efficient arithmetic operations. With self-programmable Flash memory, ICD (In-Circuit Debug) support, and a wide operating temperature range of -40C to +85C, it is engineered for both prototype and production environments. Typical applications include industrial control panels, HVAC sensor modules, automotive accessory controllers, home appliance user interfaces, and low-power remote sensor nodes. Its 36 I/O capability supports multi-channel sensor aggregation, while the 10-bit ADC delivers adequate resolution for temperature, pressure, and voltage monitoring. When designing with the PIC18LF4320-I/P, ensure decoupling capacitors are placed close to the VDD pins (typically 100 nF) and consider using MPLAB X IDE with compatible XC8 compilers and PICKit programmers for firmware development. The 40-pin PDIP footprint enables easy breadboarding and socket-based prototyping, while the wide voltage range simplifies integration into mixed-voltage systems. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing an actionable reference for engineers evaluating this MCU for embedded designs.

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PIC18LF4320-I/PT - 8-Bit 40MHz 8KB Flash MCU | Microchip
PIC18LF4320-I/PT

PIC18LF4320-I/PT - 8-Bit 40MHz 8KB Flash MCU | Microchip

The Microchip Technology PIC18LF4320-I/PT is an 8-bit CMOS Flash microcontroller from the PIC18F family, delivering 10 MIPS performance at 40 MHz clock speed with 8 KB (4K x 16) of program Flash memory, housed in a 44-pin TQFP (10x10 mm) package. The LF prefix designates a low-voltage variant with extended operating range from 2.0V to 5.5V, while the F-suffix denotes Flash program memory and the /PT industrial temperature grade covers -40C to +85C. A PIC18 microcontroller belongs to Microchip's high-performance 8-bit family, sitting above the PIC16F mid-range parts and below the PIC24/dsPIC 16-bit families in the company's product hierarchy. The PIC18 architecture uses a 16-bit instruction word with an 8-bit data path, 77 single-word instructions, hardware multiplier, and a 32-level deep hardware stack, giving it roughly 4x the throughput of legacy PIC16 mid-range devices at the same clock rate. Key features of the PIC18LF4320-I/PT include 8 KB of self-programmable Flash, 512 bytes of RAM, 256 bytes of EEPROM, a 10-bit ADC with up to 13 input channels, multiple timers (Timer0/1/2/3), a 5-bit PWM module, two analog comparators, MSSP (SPI/I2C) and USART peripherals, nanoWatt Technology for power-managed Sleep modes, and ICD (In-Circuit Debugger) support via the ICSP interface. The 'nanoWatt' label indicates integrated dynamic clock switching and idle/doze modes that reduce operating current below 1 uA in Sleep. Architecturally, the PIC18LF4320 uses a Harvard-design CPU with separate program and data buses, a peripheral pipeline that lets the CPU fetch the next instruction while peripherals complete their current cycle, and an enhanced instruction set that includes C-optimized operations. Self-programmability permits in-field firmware upgrades without external boot memory, which is essential for remote-sensor and appliance applications. Typical applications include industrial control panels, HVAC fan/sensor controllers, low-power sensor nodes, small appliances, automotive body modules (non-AEC-Q100), instrument clusters, USB-less human-interface devices, and any 5V-tolerant 8-bit embedded design that needs moderate analog integration. The wide 2.0V-5.5V supply range also supports direct battery operation from 2x AA cells or a single Li-ion cell with boost regulation. When designing with this part, ensure the MCLR pin has the proper 10 kohm pull-up to VDD for normal operation, place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pin pair, and reserve the PGM/RB5-RB7 pins for ICSP programming access. Code-size planning should leave at least 1 KB of Flash headroom for bootloader or future field-update logic.

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PIC18LF4320T-I/ML - 8KB Flash 8-Bit MCU 44-VQFN | Microchip
PIC18LF4320T-I/ML

PIC18LF4320T-I/ML - 8KB Flash 8-Bit MCU 44-VQFN | Microchip

The Microchip Technology PIC18LF4320T-I/ML is an 8-bit PIC18-family flash microcontroller featuring 8 KB (4K x 16) of program memory, 512 bytes of SRAM, and 256 bytes of EEPROM, housed in a 44-pin VQFN (ML) package with exposed thermal pad. The LF suffix indicates an extended low-voltage core that operates from 2.0 V to 5.5 V, while the I temperature grade supports the industrial -40C to +85C range. The T suffix denotes Tape & Reel packaging for high-volume assembly. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), data memory (RAM), and programmable peripherals. The PIC18F/LF family is Microchip's high-performance 8-bit architecture offering enhanced instruction set, C-friendly compiler support (MPLAB XC8), and nanoWatt Technology for dynamic power management. MCUs sit within the broader taxonomy of microprocessors -> computing ICs -> embedded processors -> microcontrollers, and dominate cost-sensitive, low-power embedded designs. Key features include 36 digital I/O pins, a 10-bit ADC with up to 13 input channels, multiple serial interfaces (USART, MSSP for SPI/I2C), four timer modules, and nanoWatt power management modes. The 44-VQFN exposed pad package provides low thermal resistance for improved power dissipation in compact layouts, while the 8 KB flash supports typical mid-complexity embedded applications. The architecture uses a 16-bit modified Harvard instruction set with an 8-bit data path, achieving up to 10 MIPS at 40 MHz. Internal PLL options allow flexible clocking from low-frequency crystals, and the device supports ICSP (In-Circuit Serial Programming) for field updates. Brown-out Reset, Power-on Reset, and a Watchdog Timer ensure reliable operation in industrial environments. Typical applications include industrial sensor interfaces, HVAC controls, low-power remote sensing nodes, small appliance controllers, and consumer electronics requiring USB-free, USB-less connectivity. The 13-channel 10-bit ADC is well suited for analog sensor reading, while multiple PWM outputs enable motor or LED control tasks. When designing with this device, ensure the exposed pad (EP) is soldered to a sufficiently large copper pour for thermal performance. The LF variant's low-voltage operation (down to 2.0 V) enables two-AA-battery or single Li-cell designs but does not support 5V-only analog performance of the F variant. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, supporting engineers searching for cross-reference, replacement, and integration guidance for the PIC18LF4320T-I/ML.

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PIC18LF4320T-I/PT - 8KB Flash 8-bit MCU 44-TQFP | Microchip
PIC18LF4320T-I/PT

PIC18LF4320T-I/PT - 8KB Flash 8-bit MCU 44-TQFP | Microchip

The Microchip Technology PIC18LF4320T-I/PT is an 8-bit PIC18 microcontroller featuring 8KB of Enhanced Flash program memory, 512 bytes of RAM, and a 36 I/O count, housed in a 44-pin TQFP (10x10 mm) package. It operates at up to 40 MHz across a 2.0 V to 5.5 V supply range (industrial temp -40C to +85C) and integrates a 10-bit ADC with nanoWatt Technology power management for energy-sensitive designs. A microcontroller (MCU) is a single-chip computer containing a processor core, non-volatile program memory, working RAM, and a rich set of peripheral interfaces. The PIC18 family sits in the 8-bit RISC hierarchy between baseline PIC10/12/16 devices and the 16-bit PIC24/dsPIC families, occupying the mid-range "high-performance, enhanced Flash" tier. The "F" series introduced Enhanced Flash memory with 100k+ erase/write endurance, making it suitable for field-upgradable firmware. The "LF" voltage variant supports low-voltage operation down to 2.0 V, distinguishing it from standard PIC18F parts that typically require 4.2 V minimum. Key features of this device include the 10-bit Analog-to-Digital Converter (ADC) with multiple input channels, USART and MSSP (SPI/I2C) serial interfaces, Capture/Compare/PWM (CCP) modules, multiple timers, and nanoWatt Technology dynamic power management modes including Idle, Sleep, and ultra-low-power Timer1 oscillator operation. The 36 I/O count enables direct connection to a wide variety of sensors, displays, and actuators without external glue logic. The PIC18LF4320 architecture uses a 16-bit instruction word with an 8-bit data path, Harvard memory organization, and a hardware multiplier for single-cycle 8x8 operations. The enhanced instruction set includes indirect, indexed, and relative addressing modes for efficient C and assembly code generation. Self-programmability via ICSP (In-Circuit Serial Programming) allows firmware updates in the field, while the 100k endurance cycle rating supports frequent parameter storage in EEPROM emulation schemes. Typical applications include industrial control and sensor interface boards, consumer appliance control panels, low-power remote sensor nodes, HVAC thermostat controllers, building automation peripherals, and USB HID/CDC device controllers when paired with a PIC18F2550-style companion. The wide 2.0-5.5 V operating range also makes it suitable for battery-powered designs using 2xAA cells, lithium chemistries, or regulated 3.3 V rails. When designing with this device, observe Microchip's recommended decoupling (0.1 uF on every VDD/VSS pair plus a bulk 10 uF), keep MCLR either tied to VDD through a 10 kohm resistor or driven by a proper supervisor, and use a 20 MHz or lower crystal if the design requires precise USART baud-rate generation. Industrial-grade parts must operate within -40C to +85C ambient per Microchip datasheet notation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers select, source, and integrate the PIC18LF4320T-I/PT efficiently.

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PIC18LF4321-I/ML - 8KB Flash 8-bit MCU 40MHz | Microchip
PIC18LF4321-I/ML

PIC18LF4321-I/ML - 8KB Flash 8-bit MCU 40MHz | Microchip

The Microchip Technology PIC18LF4321-I/ML is a low-power CMOS 8-bit Flash microcontroller from the PIC18F family, delivering 10 MIPS performance (40 MHz clock) in a 44-pin QFN (HVQCCN) exposed-pad package with industrial -40C to +85C temperature range. It integrates 8 KB of Flash program memory, 512 bytes of RAM, and 256 bytes of EEPROM, alongside a 10-bit multi-channel ADC, multiple timers, and nanoWatt Technology power management. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, optimized for deterministic real-time control in cost-sensitive embedded applications. Within the broader taxonomy it falls under microcontroller -> embedded processor -> semiconductor IC, and the PIC18 family specifically targets mid-range control tasks with enhanced instruction sets and C-friendly architecture. The "LF" prefix designates the extended low-voltage operating variant, while the "F" indicates Flash-based reprogrammable program memory. Key specifications include 77 single-word instructions, 16-bit wide instructions for improved code density, an internal 31 kHz to 8 MHz oscillator, and hardware multiply support. The PIC18LF4321 supports 4.2 V to 5.5 V supply operation in LF mode (with PIC18F4321 covering the wider 2.0 V to 5.5 V range), nanoWatt Technology for sleep currents below 1 uA, and a 10-bit ADC with up to 13 input channels depending on package. The 44-QFN package supports up to 34 digital I/O pins. The device integrates Enhanced Capture/Compare/PWM (ECCP) modules, a USART with LIN support, an MSSP module for SPI and I2C, two analog comparators, and a programmable LVD module. Its RISC architecture with hardware multiply makes it efficient for closed-loop control, sensor interfacing, and small protocol stacks. Typical applications include industrial sensor conditioning, HVAC actuator control, low-power remote sensing nodes, USB-less human-interface appliances, and motor-control pre-drivers. The wide peripheral mix lets a single MCU handle analog sensing, PWM drive, and serial communication without external glue logic. Design tip: when migrating between PIC18F4321 (F) and PIC18LF4321 (LF), verify the supply-rail upper bound and the brown-out reset trip points - LF parts lose operation above 5.5 V. The exposed thermal pad on the QFN must be soldered to a sufficient copper pour to meet theta_JA targets. This page combines distributor stock, drop-in alternatives, and engineering guidance not assembled in the manufacturer datasheet alone, giving procurement and design teams a single reference for sourcing, substitution, and implementation decisions.

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PIC18LF4321-I/P - 8-Bit MCU, 8KB Flash, 40MHz | Microchip
PIC18LF4321-I/P

PIC18LF4321-I/P - 8-Bit MCU, 8KB Flash, 40MHz | Microchip

The Microchip Technology PIC18LF4321-I/P is an 8-bit CMOS Flash-based microcontroller from the PIC18F family, delivering 10 MIPS (100 ns instruction execution) at 40 MHz in a 40-pin PDIP through-hole package. The 'LF' prefix denotes the low-voltage variant operating from 2.0 V to 5.5 V (versus 4.2 V–5.5 V for the standard 'F' version), and the 'I' suffix designates the industrial temperature range of -40 °C to +85 °C. The device integrates 8 KB of Flash program memory (4K × 16 words), 512 bytes of SRAM, and 256 bytes of EEPROM, alongside a rich mix of peripherals. A microcontroller (MCU) is a single-chip computer that integrates a CPU, program and data memory, and programmable I/O peripherals onto one die, enabling standalone embedded control. PIC18F devices sit in Microchip's 8-bit enhanced architecture family, between the baseline PIC16F and the 16-bit dsPIC/PIC24 families, optimized for low-power, deterministic, interrupt-driven applications such as motor control, industrial sensing, and consumer appliances. The enhanced 16-bit instruction set and 31-level hardware stack balance C-compiler friendliness with predictable real-time response. Key features include 10-bit ADC with up to 13 input channels, two analog comparators, an Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART), two MSSP (I²C/SPI) modules, two Capture/Compare/PWM (CCP) modules plus an Enhanced CCP for motor-control PWMs, two 8-bit timers and three 16-bit timers, and a 10-bit ADC. The LF core supports software-selectable oscillator modes including INTOSC (up to 8 MHz), HS, XT, LP, EC, and PLL with x4, providing flexible clocking for low-EMI and battery-powered designs. Typical applications include industrial control panels, white goods and major-appliance user interfaces, low-cost remote sensor nodes, HVAC thermostat control, automotive body and lighting peripherals (non-safety), USB-to-UART bridges when paired with a PIC18LF2550, and battery-powered handheld instrumentation where the 2.0 V min supply extends usable runtime from partially-depleted cells. The 40-PDIP footprint enables breadboard-friendly prototyping and reworkable through-hole assembly. When designing with the PIC18LF4321-I/P, ensure that VDDCORE decoupling (0.1 µF + 10 µF bulk) is placed within 6 mm of the dedicated VDDCORE/VSS pairs and respect the 50-pin microcontroller ESD precautions. Designers migrating from PIC16F should budget for the larger Flash-to-RAM ratio and 16-bit instruction word when estimating code density. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC18LF4321T-I/PT - 8-bit 40MHz 8KB Flash MCU 44-TQFP | Microchip
PIC18LF4321T-I/PT

PIC18LF4321T-I/PT - 8-bit 40MHz 8KB Flash MCU 44-TQFP | Microchip

The Microchip Technology PIC18LF4321T-I/PT is an 8-bit PIC microcontroller from the PIC18F family, featuring a 40 MHz core, 8 KB (4K x 16) of Flash program memory and 512 bytes of SRAM in a 44-pin TQFP (10x10 mm) package. The 'LF' prefix indicates a low-voltage variant designed to operate from 2.0V to 5.5V, while the 'T' suffix designates tape-and-reel packaging and the 'I' indicates the industrial -40C to +85C temperature range. This combination makes it suitable for cost-sensitive embedded designs that must run from a single Li-ion cell or from a 3.3V regulated rail. A PIC18 microcontroller is a modified Harvard RISC architecture 8-bit MCU built around an enhanced instruction set with 16-bit instructions and an 8-bit data path. PIC18 devices sit within the broader PIC family hierarchy: PIC10/12/16/18 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The PIC18 line specifically targets high-performance applications with up to 40 MHz operation, integrated peripherals such as ADC, PWM, I2C, SPI, UART, and USB (where applicable), and self-programming Flash memory. Compared to baseline PIC16 parts, PIC18 adds linear program memory addressing, a hardware multiplier, and a richer interrupt controller. Key features of the PIC18LF4321 include 8 KB of self-programmable Flash, 256 bytes of EEPROM, 34 digital I/O pins, a 10-bit ADC with multiple channels, two analog comparators, two 8-bit timers plus three 16-bit timers, an enhanced USART, MSSP (I2C/SPI), and the standard PIC18 nanoWatt power-managed feature set. The Flash endurance is rated for a minimum of 10K erase/write cycles and data EEPROM for 100K cycles, supporting frequent in-field firmware updates. The LF family uses Microchip's nanoWatt technology with multiple power-managed operating modes including run, idle, sleep, deep sleep, and RTCC from a low-power oscillator. This architecture reduces quiescent current to microampere levels in sleep, enabling battery-powered designs that wake on interrupts and resume execution within microseconds. Typical applications include industrial sensor interfaces, home appliances and white goods, low-cost motor control, USB peripherals on the PIC18F/LF4321 family, battery-powered metering, and consumer electronics. The 44-pin TQFP footprint and Microchip's free MPLAB X IDE with XC8 compiler create a low-cost entry point for embedded engineers. When designing with this part, verify the core supply voltage and analog reference setup; the LF variant does not include a 5V-only regulator and requires proper decoupling on AVDD/AVSS pins. Engineers upgrading from the PIC18F4321 (F = standard voltage, 4.2V-5.5V) must verify that their firmware operates correctly across the LF's wider 2.0V-5.5V range. This page synthesizes distributor pricing, drop-in same-package alternatives (PIC18LF4321, PIC18LF4320T-I/PT), and practical design notes not consolidated in the manufacturer datasheet.

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PIC18LF4331-I/ML - 8-bit 40MHz MCU 8KB Flash 44-QFN | Microchip
PIC18LF4331-I/ML

PIC18LF4331-I/ML - 8-bit 40MHz MCU 8KB Flash 44-QFN | Microchip

The Microchip Technology PIC18LF4331-I/ML is an 8-bit PIC18F-family flash microcontroller IC running at up to 40 MHz, with 8 KB (4K x 16) of on-chip program Flash, 768 bytes of RAM, and 256 bytes of EEPROM, housed in a 44-pin QFN (8x8 mm) package. The LF (low-voltage F) variant operates across a wide 2.0 V to 5.5 V supply range, supporting both battery-powered and 5 V regulated designs. The 44-QFN package integrates 34 digital I/O lines plus dedicated peripherals such as nanoWatt power management, an enhanced 14-bit high-performance PWM module, a 10-bit A/D converter with up to 9 channels, and Motor Control PWM peripherals suitable for advanced motor control loops. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, I/O peripherals, and interrupt logic on a single die. The PIC18F family belongs to the 8-bit CMOS microcontroller category, itself a branch of microcontrollers (MCUs), which in turn are sub-classes of embedded processors, semiconductors, and integrated circuits (ICPs). The PIC18F family builds on the legacy PIC16 architecture by adding a 16-bit instruction word, linear memory addressing, hardware multiplier, and C-friendly design, making it a common choice for low-power real-time control applications where deterministic behavior is more important than raw MIPS. Key differentiating features include the nanoWatt technology power management suite (multiple idle/sleep modes, ultra-low-power Real-Time Clock calendar, and on-chip Low-Voltage Detect), the 14-bit Enhanced PWM (motor-control-grade PWM with programmable dead-band, fault inputs, and center-aligned modes), and the 9-channel 10-bit ADC. The 44-QFN (8x8) package provides a thermally efficient exposed pad with low RθJA, which improves continuous high-current GPIO drive and PWM switching performance compared with equivalent PDIP or QFP variants of the same die. Typical applications span 3-phase brushless DC (BLDC) motor control, sensor-less fan / pump controllers, advanced ceiling-fan and HVAC blowers, compact white-goods inverter boards, and low-cost industrial sensor transmitters. The combination of dedicated motor-control PWM, fast ADC, and nanoWatt sleep modes also makes it attractive for energy harvesting and solar-powered remote nodes that spend most of their life in sleep state. When designing with this part, follow the Microchip PIC18F4331/4331/4431 datasheet guidelines for the QFN exposed pad - it must be soldered to a sufficiently large copper pour to meet the thermal and electrical ground bond requirements. In-system programming is via ICSP on RB6/RB7, so the PCB must keep those pins accessible. Always check the errata and DS39591 family reference manual for the specific silicon revision in your lot before locking the BOM. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in any single manufacturer datasheet or distributor listing, with values verified as of 2026-09-28.

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PIC18LF4331-I/PT - 8KB Flash 8-bit MCU w/ Motor PWM | Microchip
PIC18LF4331-I/PT

PIC18LF4331-I/PT - 8KB Flash 8-bit MCU w/ Motor PWM | Microchip

The Microchip PIC18LF4331-I/PT is an 8-bit RISC microcontroller in the PIC18F family, offering 8KB of Flash program memory, 768 bytes of SRAM, and 256 bytes of EEPROM, packaged in a 44-pin TQFP (10x10 mm). It operates at up to 40 MHz and features 34 digital I/O pins, three 16-bit timers, two analog comparators, and a 10-bit ADC with up to 9 channels. The "LF" prefix denotes the low-voltage variant supporting 2.0V to 5.5V operation, suitable for battery-powered and energy-conscious designs. What is a PIC microcontroller? A PIC (Peripheral Interface Controller) is a family of 8-bit, 16-bit, and 32-bit microcontrollers built on a Harvard-architecture RISC core originally developed by General Instrument's Microelectronics Division and now produced by Microchip Technology. PIC18F devices sit in the high-performance tier of the 8-bit PIC family, combining enhanced instruction set (16-bit wide opcodes), multiple peripherals (motor-control PWM, USB, CAN, ADC), and nanoWatt power-management modes. They are commonly used in motor control, sensor interfacing, and small embedded control loops where low cost and mature toolchains (MPLAB X IDE, XC8 compiler, MPLAB ICD programmers) are priorities. Key features of the PIC18LF4331 include an integrated Power Control PWM (PCPWM) module with three complementary PWM outputs, dead-band control and programmable fault inputs specifically designed for 3-phase motor drives. The 10-bit ADC with up to 200 Ksps throughput supports current sensing, while the Capture/Compare/PWM (CCP) and Enhanced CCP modules add flexible waveform generation. The device also incorporates the nanoWatt technology power-saving modes (Idle, Sleep, and Run), an on-chip 32 kHz oscillator for low-power timing, and an ICD (In-Circuit Debug) interface for non-intrusive development. Typical applications for the PIC18LF4331 include BLDC and PMSM motor controllers, ceiling fan and pump controllers, HVAC blower drivers, small appliance motor control, sensor signal conditioning front-ends, and industrial control boards where 8-bit cost targets and 5V-tolerant I/O are essential. The wide operating voltage (2.0V to 5.5V) also suits 2-cell battery packs and unregulated supply rails. When designing with this MCU, allocate decoupling capacitors (100 nF + 10 uF) close to VDD/AVDD/VSS pins and place the 20 MHz or 40 MHz crystal (with appropriate load capacitors) within 10 mm of OSC1/OSC2 to minimize EMI. Use the integrated PCPWM module's programmable dead-band and fault shutdown rather than discrete gate-driver logic to reduce BOM cost.

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PIC18LF4331T-I/PT - 40MHz 8-bit MCU 8KB FLASH 44-TQFP | Microchip
PIC18LF4331T-I/PT

PIC18LF4331T-I/PT - 40MHz 8-bit MCU 8KB FLASH 44-TQFP | Microchip

The Microchip Technology PIC18LF4331T-I/PT is a low-power 8-bit PIC18 microcontroller running up to 40 MHz, integrating 8 KB of FLASH program memory (organized as 4K x 16 words) and 768 bytes of SRAM in a 44-pin TQFP (10x10 mm) package. It belongs to the PIC18F4331/4431 motor-control family and is tailored for digital signal control of brushless DC, switched-reluctance, and AC-induction motors via its integrated 14-bit-resolution Power Control PWM module. What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer that processes data in 8-bit-wide chunks, integrates CPU core, program memory (FLASH/ROM), data memory (RAM), and a rich peripheral set including timers, ADC, PWM, and communication interfaces. Positioned in the taxonomy: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor device. The PIC18 family uses an enhanced Harvard RISC architecture with 16-bit instructions and 8-bit data paths, balancing deterministic real-time control with low power consumption for cost-sensitive industrial and consumer applications. The 'LF' designation indicates an extended-voltage variant operating down to 2.0V, making the part suitable for battery-powered designs across the industrial -40C to +85C range. The 'T' suffix marks Tape-and-Reel packaging for high-volume SMT assembly, while 'I/PT' confirms the industrial temperature grade and TQFP-44 pinout. The integrated 10-bit ADC (up to 9 channels), two CCP/ECCP modules, two analog comparators, and the dedicated Motion Feedback Module (10-bit Slope ADC) eliminate the need for external motor-control ICs in many single-axis BLDC designs. Typical applications span sensorless BLDC fan and pump controllers, permanent-magnet synchronous motor (PMSM) drivers for HVAC blowers, small appliance motor control (vacuum cleaners, washing-machine pumps), and stepper/switched-reluctance drives in industrial automation. Communication peripherals include I2C, SPI, and an enhanced USART with autobaud detection, easing integration with sensors and HMI modules. When designing with this MCU, verify that the application's code footprint does not exceed the 8 KB FLASH limit; the PIC18K-series (e.g., PIC18F26K22) is the recommended migration path if software growth requires more headroom. Always read-latch-protect configuration bits and use the ICD3 or PICkit 4 programmer for in-circuit debug access. This page consolidates distributor stock, parametric same-package alternatives, and application-level design notes that complement the datasheet block diagrams for production engineers evaluating 44-pin TQFP motor-control MCUs.

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PIC18LF43K22-E/MV - 8KB Flash 8-bit nanoWatt XLP MCU | Microchip
PIC18LF43K22-E/MV

PIC18LF43K22-E/MV - 8KB Flash 8-bit nanoWatt XLP MCU | Microchip

The Microchip Technology PIC18LF43K22-E/MV is an 8-bit RISC microcontroller from the PIC18 (LF) XLP family, integrating 8 KB of Flash program memory, 512 bytes of RAM and 256 bytes of EEPROM in a 40-pin UQFN (5x5 mm) package with exposed pad. It executes a single instruction per clock cycle at up to 64 MHz, delivering roughly 16 MIPS while drawing only nanoWatt-class sleep currents, making it a fit for line- and battery-powered edge nodes. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile Flash program memory, RAM, EEPROM/Flash data, configurable digital peripherals (timers, I/O, communication ports) and analog peripherals (ADC, comparators, DAC) on one die. PIC18 microcontrollers use an enhanced RISC Harvard architecture that maps program and data memory onto separate buses, which lets the fetch and execute stages overlap. Within the PIC taxonomy (PIC10/12/14/16/17/18/24/32-bit families), the PIC18 sits at the top of the 8-bit line, offering the largest program space and the richest peripheral set; the PIC18F (Flash) subfamily is the mainstream 5V node, while the PIC18LF (Low-Voltage F) variant covers 1.8V-3.6V operation for battery-backed designs. Both Flash families descend from Microchip's broader hierarchy: microcontroller -> embedded computing -> semiconductor -> integrated circuit. Key features of the PIC18LF43K22-E/MV include ten 10-bit ADC channels, two 8-bit timers plus three 16-bit timers, two analog comparators, a hardware EUSART, two MSSP (I2C/SPI) modules, an mTouch capacitive-sensing peripheral and a wide 1.8V-3.3V operating range. nanoWatt XLP technology drops standby current to roughly 20 nA in real-time-clock mode and below 100 nA in sleep, preserving battery life on multi-year deployments. The part combines an enhanced mid-range 8-bit RISC core, dual oscillator/PLL clocking, an HFINTOSC that removes the external crystal in many designs, and on-chip debug via ICD over PGED/PGEC. The 40-pin UQFN (MV package, 5x5x0.5 mm) lands the device on a footprint that competes with much newer ARM Cortex-M0+ chips but retains the PIC18 instruction set, easing migration for established PIC code bases and shortening the path through CE/FCC for legacy products. Typical applications include battery-powered sensor pods, low-energy IoT edge nodes, consumer white-goods HMI controls, instrumentation front-ends, and industrial telemetry where a 1.8V supply rail is available. The dual-I2C/SPI chain plus 10-bit ADC simplifies temperature, pressure and level sensing with minimal external components. When designing with this MCU, budget for the exposed thermal pad to be soldered to a 1 cm² copper pour so that the 64 MHz core remains within the -40 °C to +125 °C (E = Extended) junction envelope. Always place the standard 100 nF decoupling cap within 5 mm of every VDD/VSS pair and add a 10 µF bulk capacitor near the IC to suppress analog rail noise. This page consolidates distributor pricing, drop-in same-family alternatives, and practical design notes into one place to shorten PIC18LF43K22-E/MV evaluation versus the manufacturer datasheet alone.

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PIC18LF43K22-E/P - 8-bit PIC MCU, 8KB Flash, 40-Pin DIP | Microchip
PIC18LF43K22-E/P

PIC18LF43K22-E/P - 8-bit PIC MCU, 8KB Flash, 40-Pin DIP | Microchip

The Microchip Technology PIC18LF43K22-E/P is an 8-bit PIC18 microcontroller featuring 8KB of Flash program memory, 3968 bytes of SRAM, and 256 bytes of EEPROM, packaged in a 40-pin PDIP (DIP-40). The LF prefix denotes the low-power (1.8V–3.6V) core variant of the PIC18(L)F2X/4XK22 family, which targets battery-friendly and energy-harvesting designs. The -E suffix indicates the extended operating temperature grade of -40°C to +125°C, while /P denotes the through-hole PDIP-40 package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripherals such as timers, ADC, communication interfaces, and I/O ports. The PIC18 family occupies Microchip's mid-range 8-bit portfolio, sitting between the baseline PIC10/12/16 families and the 16-bit dsPIC/DSC line. PIC18 MCUs use a modified Harvard architecture with a RISC instruction set, 16-bit instructions, and an 8-bit data path, and they are programmed via Microchip's MPLAB X IDE with XC8 compilers. PIC18 parts are widely used in industrial automation, consumer appliances, sensor hubs, and automotive body modules where deterministic 8-bit performance and low power matter more than raw compute throughput. Key features of the PIC18LF43K22 include eXtreme Low Power (XLP) technology with nanoWatt XLP sleep currents below 50 nA typical, a 10-bit ADC with up to 28 channels, multiple Enhanced USART, MSSP (SPI/I2C), and CCP/ECCP modules, a 16-bit timer/counter, and a wide 1.8V–3.6V operating range that makes the part directly suitable for single-cell Li-ion or two-AA-battery systems. Internal 32 kHz and 16 MHz oscillators plus PLL support a top instruction rate of 16 MIPS at 64 MHz CPU clock, while on-chip mTouch capacitive sensing hardware enables touch-button user interfaces without external components. The PIC18 architecture combines a deterministic RISC pipeline with a rich peripheral set, giving the LF43K22 deterministic interrupt latency for real-time control loops. Compared to ARM Cortex-M0 alternatives, PIC18 parts typically consume less sleep current but offer lower MIPS; compared to older PIC16 parts, PIC18 adds linear memory, hardware multiplier, and 16-bit instruction word for higher code density. The 40-pin PDIP package remains the development platform of choice for breadboard prototyping and legacy designs that must remain through-hole for serviceability or conformal coating reasons. Typical applications include industrial sensor transmitters, battery-powered remote controls, low-power wireless sensor nodes, building automation nodes (thermostats, HVAC actuators), handheld test instruments, and automotive body controllers (lighting, mirror, seat modules) using the AEC-Q100-qualified PIC18F version. The XLP sleep modes also make the LF43K22 a strong choice for energy-harvesting designs where the MCU spends most of its life in deep sleep. Designers should budget decoupling capacitance (typically 100 nF plus 10 µF bulk) close to VDD/VSS pins, route MCLR through a 10 kΩ pull-up, and follow Microchip's emulator/ICSP pinout rules if in-circuit programming is required. PIC18 code compiled with XC8 v2.x differs from older HI-TECH and MPLAB C18 binaries in calling convention, so legacy source code may need porting. This page synthesizes distributor pricing, drop-in PIC18 family alternatives in the same PDIP-40 footprint, and practical design notes that are not consolidated in the manufacturer datasheet, giving procurement and firmware teams a faster path to a second source or drop-in replacement.

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PIC18LF43K22-E/PT - 8KB Flash 8-bit MCU 44-TQFP | Microchip
PIC18LF43K22-E/PT

PIC18LF43K22-E/PT - 8KB Flash 8-bit MCU 44-TQFP | Microchip

The Microchip PIC18LF43K22-E/PT is an 8-bit RISC microcontroller from the PIC18 family with 8KB Flash program memory, 3968 bytes RAM, and 256 bytes EEPROM, housed in a 44-pin TQFP (PT) package. It operates from 1.8V to 3.6V, making it a low-voltage (LF) variant designed for battery-powered and energy-sensitive applications. An 8-bit microcontroller (MCU) is a small computer-on-a-chip containing a CPU, memory, and peripherals on a single die. Within the broader taxonomy, the PIC18LF43K22 belongs to the PIC18 family (8-bit RISC cores), which is a sub-family of Microchip's PIC microcontroller portfolio. It is classified as a low-power (LF), general-purpose MCU, sitting between simple 8-bit controllers (PIC16) and higher-pin-count PIC18 variants. This hierarchy matters because the PIC18 core architecture delivers enhanced instruction set, C-compiler friendly design, and nanoWatt XLP technology for ultra-low-power operation. Key features include nanoWatt XLP technology for sub-uA sleep currents, an integrated 12-bit ADC with up to 28 channels, multiple communication peripherals (EUSART, MSSP SPI/I2C), and 36 digital I/O pins. The device supports industrial temperature range (-40C to +125C) and is qualified to Microchip's industrial reliability standards. The PIC18LF43K22 uses a 16-bit instruction word with Harvard architecture, achieving up to 16 MIPS performance at 64 MHz CPU clock. The advanced peripheral set includes motor-control PWMs, comparators, and capacitive touch sensing support via the mTouch peripheral framework. Typical applications include portable medical devices, IoT sensor nodes, industrial sensor hubs, low-power remote controls, battery management systems, and consumer appliances where sleep-mode current budget is critical. When designing with this device, ensure the supply voltage stays within the 1.8V-3.6V LF range; for 5V systems use the PIC18F43K22 variant instead. The ICSP programming interface requires dedicated pins that must not be repurposed without disabling in-circuit programming. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated in the Microchip datasheet PDF.

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PIC18LF43K22-I/ML - 8KB Flash 8-bit XLP MCU 44-QFN | Microchip
PIC18LF43K22-I/ML

PIC18LF43K22-I/ML - 8KB Flash 8-bit XLP MCU 44-QFN | Microchip

The Microchip Technology PIC18LF43K22-I/ML is an 8-bit PIC microcontroller from the PIC® XLP™ 18K family, delivering 64 MHz of computational performance with 8 KB (4K x 16) of Flash program memory in a 44-pin QFN (8x8 mm) package with exposed pad. According to the verified distributor listings, this 'LF' variant operates across a low-voltage range of 1.8 V to 3.6 V, making it the lower-Vdd sibling of the 5 V-tolerant PIC18F43K22, optimized for battery-powered and energy-harvesting designs. What is a PIC XLP microcontroller? An XLP (eXtreme Low Power) MCU is a class of 8-bit microcontroller from Microchip that integrates nanoWatt XLP technology for sub-microamp sleep currents, RTC operation from a 32 kHz crystal, and multiple low-power operating modes (Run, Idle, Sleep, Deep Sleep). It sits within the broader hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> PIC18 family -> XLP 18K sub-family -> K22 series. The PIC18LF43K22 belongs to the 28/40/44-pin low-power high-performance family described in the manufacturer datasheet. Key differentiating features include 64 MHz internal oscillator operation, hardware 8x8 multiply, CLC (Configurable Logic Cell) and ECCP (Enhanced Capture/Compare/PWM) peripherals, mTouch capacitive sensing support, 35 I/O pins, and an integrated 12-channel 10-bit ADC. The XLP technology delivers typical sleep currents in the nanoamp range, making this device ideal for applications where quiescent power dominates the energy budget over active compute time. Architecturally, the PIC18LF43K22 uses an enhanced 8-bit PIC Harvard architecture with separate program and data buses, supporting C-compiler-friendly instruction set extensions. The 8 KB self-programmable Flash, 256 B EEPROM, and 768 B RAM provide ample headroom for state machines, protocol stacks, and sensor fusion in compact sensor nodes. Typical applications include battery-powered sensor nodes, wearable health monitors, IoT edge devices, consumer remote controls, low-power wireless sensor networks, and e-metering endpoints. The wide Vdd range and robust peripheral mix also suit HMI touch panels and small white-goods user interfaces. When designing with the PIC18LF43K22, choose the 'LF' variant when Vdd stays at or below 3.6 V (Li coin cells, single-cell Li-Ion, 2xAA). For 5 V rails choose the PIC18F43K22. The 44-QFN exposed pad is mandatory for thermal dissipation; do not leave it floating. The I/ML package suffix indicates industrial temperature range (-40C to +85C) and tube packaging. This page synthesizes distributor stock status, drop-in alternatives within the same 44-QFN footprint, and practical design notes that extend beyond the datasheet typical application circuits.

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