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PIC18LF26K83T-I/SO

PIC18LF26K83T-I/SO - 64KB Flash 8-bit MCU with CAN | Microchip

The Microchip Technology PIC18LF26K83T-I/SO is an 8-bit PIC18 XLP microcontroller with 64 KB Flash, 4 KB RAM and integrated CAN technology, housed in a 28-pin SOIC wide-body package and operating at up to 64 MHz. The 'LF' prefix indicates the low-voltage / low-power variant that runs from 1.8 V to 3.6 V, while the standard 'F' variant runs up to 5 V. What is a PIC microcontroller? PIC (Peripheral Interface Controller) microcontrollers are Microchip's proprietary 8/16/32-bit RISC-based MCUs with a Harvard architecture, belonging to the broader category of microcontrollers -> embedded processors -> semiconductors. Within Microchip's portfolio the PIC18 family sits in the mid-range 8-bit tier, offering more peripherals, RAM and code density than the PIC10/12/16 families while retaining the same instruction set. The 'K83' sub-family specifically integrates an ADC2 (12-bit ADC with Computation) and a CAN FD controller, making it a hybrid analog/digital/communications MCU. Key features of the PIC18LF26K83 include 64 KB (32K x 16) self-programmable Flash, 4 KB SRAM, 1 KB EEPROM, a 12-bit ADC2 with Capacitive Voltage Divider (CVD) support for advanced touch sensing, a 10-bit DAC, five 16-bit timers, two comparators, and a CAN FD module. The XLP (eXtreme Low Power) feature set keeps active current around 5 mA at 64 MHz and allows sleep currents in the nanoamp range, well suited for battery-backed industrial nodes. The PIC18 (L)F25/26K83 family uses a 14-bit instruction width RISC core with a hardware multiplier, providing deterministic interrupt latency and C-compiler-friendly performance. The 28-pin SOIC footprint exposes two I/O ports (PORTB, PORTC), a full MSSP (SPI/I2C), two USARTs, and the CAN peripheral. Internal 32 MHz and 31 kHz oscillators reduce BOM cost and free two pins that older PIC18 devices reserved for crystals. Typical applications include industrial automation nodes, CAN-connected sensor hubs, low-power remote controls, touch-sensing human-machine interfaces, and automotive body controllers running at 3.3 V. The 12-bit ADC2 with CVD enables robust capacitive buttons and sliders without external touch ICs. The XLP sleep modes extend battery life in IoT edge nodes that wake periodically to transmit on CAN. When designing with this part, place a 100 nF decoupling capacitor on every VDD pin and keep the VDD/VSS traces short. For CAN bus applications, add a 120 ohm termination at each end of the bus and verify the CAN transceiver (e.g. MCP2561/ATA6560) shares the same logic-level threshold. When migrating from the PIC18F26K83, simply reduce VDD to 3.3 V; the LF device tolerates the same peripherals but at lower VDDmax. This page synthesizes verified distributor pricing, same-family Microchip drop-in alternatives, comparison tables, and practical design notes - information that is not assembled in any single manufacturer document or distributor page.

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PIC18LF27J13-I/SP

PIC18LF27J13-I/SP - 128KB Flash 8-bit MCU 48MHz | Microchip

The Microchip Technology PIC18LF27J13-I/SP is an 8-bit PIC18 microcontroller in the low-power XLP nanoWatt family, featuring 128KB of Flash program memory, 4KB of RAM, and a 12 MIPS (48 MHz) MIPS16-enhanced CPU core housed in a 28-pin SPDIP (SP) through-hole package. The "LF" prefix denotes the 2.0V-3.6V low-voltage variant suited for battery-powered designs, while the "I" suffix specifies the industrial -40C to +85C operating temperature range. An 8-bit PIC microcontroller is a Harvard-architecture RISC processor designed for embedded control, combining a compact instruction set with rich peripheral integration (ADC, timers, communication ports) on a single die. Within the broader taxonomy, PIC MCUs sit under the microcontroller category, which itself belongs to integrated circuits and embedded systems; the PIC18 sub-family adds hardware multiply, extended instructions, and C-friendly addressing over the baseline PIC16 line. Key features of the PIC18LF27J13-I/SP include 128KB self-programmable Flash (64K x 16 organization), 4KB SRAM, 12-bit A/D converter with up to 10 channels, multiple Enhanced USART, SPI, and I2C interfaces, 4 timers, a 10-bit PWM module, and Microchip's nanoWatt XLP deep-sleep modes drawing under 100 nA. The 48 MHz internal oscillator with PLL delivers 12 MIPS throughput, and the integrated RTCC with on-chip calibration supports accurate real-time clock operation without external crystals. Architecturally, the device uses a modified Harvard bus with separate program and data paths, a 16-bit instruction word, and a 32-level hardware stack. The Flash program memory is partitioned for boot loader and application use, and self-programmability enables in-application firmware updates. The 10-bit A/D converter with acquisition time programmable down to 0.4 us supports high-speed sensor sampling for motor control and instrumentation. Typical applications include consumer white goods, industrial sensor nodes, home-automation controllers, USB-to-UART bridges, portable medical telemetry, and low-power wireless sensor platforms. The deep-sleep nanoWatt technology extends battery life for energy-harvesting or coin-cell designs, and the wide peripheral set keeps external component count low. When designing with this part, verify the supply rail sits within the 2.0V-3.6V LF specification; the non-LF PIC18F27J13 family operates at 4.2V-5.5V. Use proper decoupling (100 nF plus 10 uF bulk) close to the VDD/VSS pins, and configure the configuration bits for the chosen oscillator mode before programming. This page synthesizes distributor pricing, drop-in compatible PIC alternatives, and practical low-power design notes not aggregated in the manufacturer datasheet.

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PIC18LF27J13-I/SS

PIC18LF27J13-I/SS - 128KB Flash 48MHz 8-bit nanoWatt MCU | Microchip

The Microchip Technology PIC18LF27J13-I/SS is a high-performance 8-bit PIC18 RISC microcontroller in a 28-pin SSOP package, featuring 128KB Flash program memory, 4KB RAM, and a 48MHz internal clock speed delivering up to 12 MIPS of throughput. It integrates Microchip's nanoWatt XLP extreme low-power technology, 10-channel 12-bit ADC, two USART, two SPI, and I2C peripherals in a single low-pin-count SSOP-28 footprint. An 8-bit microcontroller is a programmable compute engine built around an 8-bit data path and Harvard architecture that separates program and data memories. PIC18 devices sit at the upper tier of Microchip's 8-bit PIC portfolio and offer the richest instruction set (75 instructions with optional extended mode), the largest memory densities, and the widest range of analog and communication peripherals in the 8-bit family. Designers choose 8-bit MCUs for cost-sensitive, low-power applications where the I/O count, code density and BOM size justify staying below 32-bit architectures. Key features that distinguish the PIC18LF27J13 include 128KB self-programmable Flash (64K x 16 words), 4KB SRAM, 256 bytes of EEPROM, deep-sleep current typically below 100 nA, and a peripheral pin-select (PPS) engine that lets digital peripherals be remapped onto a wide choice of physical pins. The 12-bit/10-channel ADC, two analog comparators, and a hardware RTCC with calendar mode round out the analog and timing features. Multiple power-managed operating modes - run, idle, sleep, deep sleep, and ultra-low-power wake - enable battery-life targets well beyond 1 year on a single CR2032 cell. Architecturally the chip pairs an 8-bit modified-RISC core with a wide peripheral set, internal 31 kHz and 8 MHz oscillators (plus a 48 MHz PLL on the F-variant), and a flexible 28-pin I/O mapping scheme. The 4.2-5.5V supply range simplifies integration into industrial sensor nodes, USB-CDC bridges, and 5V-rail mains-powered appliances without external level translation. Typical applications include industrial sensor conditioning with on-chip 12-bit ADC, low-power IoT sensor nodes using nanoWatt XLP modes, USB-CDC virtual COM-port bridges (PIC18F variant), motor-control signal pre-processing, and metering or measurement instruments. In each case the same-package drop-in alternatives on this page give designers multiple sourcing options without PCB rework. When designing with this part, pay close attention to PPS mapping - assigning I2C or UART to desired pins requires careful review of the PPS lock sequence in the datasheet. Use the ICD 3 or PICkit 4 debugger for production-intent bring-up and never rely on internal RC alone for asynchronous serial links. This page synthesizes distributor pricing, drop-in SSOP-28 alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC18LF27J13T-I/ML

PIC18LF27J13T-I/ML - 128KB Flash 8-bit MCU, 28-VQFN | Microchip

The Microchip Technology PIC18LF27J13T-I/ML is an 8-bit PIC18 XLP nanoWatt microcontroller delivering 48 MHz CPU performance with 128 KB Flash, 4 KB RAM, and a 12-bit ADC in a 28-pin VQFN (ML) 6x6 mm package with exposed thermal pad. It belongs to the low-power "LF" variant designed for 2.5V/3.3V operation and supports the PIC18 J-series peripheral set including deep-sleep modes for energy harvesting and battery-powered designs. An 8-bit microcontroller (MCU) is a programmable integrated circuit that combines a CPU, non-volatile program memory (Flash), volatile working memory (RAM), and configurable peripherals on a single die. Within the broader semiconductor taxonomy, an MCU sits inside the microcontrollers category, which itself is a sub-family of embedded processors and SoCs, ultimately classified under Integrated Circuits. Microchip's PIC18 family extends the original PIC architecture with enhanced 16-bit instructions, linear memory mapping, and C-friendly peripherals. Key differentiating features include the XLP (eXtreme Low Power) nanoWatt technology with deep-sleep currents below 100 nA, 12 MIPS sustained throughput, 10-bit ADC (with 12-bit option on selected channels), multiple communication peripherals (UART, SPI, I2C), and CTMU for capacitive touch sensing. The 28-VQFN package with exposed pad gives a compact 6x6 mm footprint suitable for space-constrained wearable and IoT designs. Technically, the PIC18LF27J13 uses a Harvard RISC architecture with a 16-bit instruction word and 8-bit data path, 31-level hardware stack, and an internal PLL that derives the 48 MHz system clock from a low-frequency external crystal or internal oscillator. The peripheral set includes multiple timers, capture/compare/PWM modules, comparators, and a charge time measurement unit for touch. Typical applications include battery-powered IoT sensor nodes, wearable health monitors, low-power wireless peripherals, capacitive touch user interfaces, home automation controllers, and consumer electronics where board area is constrained. The exposed pad on the VQFN package also improves thermal dissipation for environments up to 85 C industrial operation. When designing with this MCU, ensure the exposed thermal pad on pin 29 is soldered to a sufficient copper pour to meet the thermal resistance specification. Programming is supported by Microchip's MPLAB X IDE, XC8 compiler, and PICkit programmer ecosystem, and the deep-sleep wake sources should be planned before laying out the PCB. This page synthesizes distributor pricing, drop-in package alternatives, and practical design notes not found in the manufacturer datasheet, providing engineering context for sourcing and replacement decisions across the PIC18LF family.

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PIC18LF27J13T-I/SO

PIC18LF27J13T-I/SO - 8-bit 48MHz 128KB Flash MCU | Microchip

The Microchip Technology PIC18LF27J13T-I/SO is a low-power 8-bit PIC18 microcontroller in a 28-pin SOIC (SO) package featuring 128 KB Flash program memory, 4 KB RAM, and a 12-bit ADC, delivered in Tape & Reel packaging. Built on the PIC18J family with nanoWatt XLP technology, the device runs up to 48 MHz (12 MIPS) and is engineered for low-power embedded designs where extended battery life and high analog precision are required. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, Flash program memory, SRAM data memory, and peripheral interfaces on one die. Within the PIC18 family, the 'LF' suffix denotes the low-voltage (2.0 V to 3.6 V) variant, and the 'J' family adds nanoWatt XLP sleep modes, a 12-bit A/D converter, and on-chip peripherals such as comparators and CTMU. The PIC18J sits in Microchip's broader hierarchy: 8-bit PIC -> PIC18 -> PIC18J (low-power XLP) -> power management IC / semiconductor. Key features include 128 KB self-programmable Flash, 4 KB linear RAM, 12-bit ADC with up to 10 channels, an integrated RTCC, two I2C/SPI, two UART, and nanoWatt XLP sleep currents in the nanoamp range. The 28-SOIC package offers easy hand-soldering and breadboard-friendly assembly, making it ideal for prototypes, industrial modules, and cost-sensitive consumer devices. The PIC18J core uses a 16-bit modified Harvard architecture that supports C-compiled code efficiently. Hardware multipliers, an 8x8 hardware MAC, and DMA-free peripheral operation simplify firmware design while keeping deterministic interrupt response, a hallmark of PIC microcontrollers. Typical applications include battery-powered sensor nodes, USB/HID peripherals, industrial control boards, low-power wireless gateways, and medical instrumentation. The wide 2.0-3.6 V range suits Li-ion and two-AA-cell systems, while the 12-bit ADC enables precision temperature, voltage, and current measurements. When designing with the PIC18LF27J13T-I/SO, confirm that the supply rail stays within 2.0-3.6 V and that decoupling (100 nF + 10 uF) is placed close to VDD/VSS pins. Unlike the 5 V PIC18F version, this LF part must never see VDD above 3.6 V or its internal Flash charge pumps can be damaged. This page synthesizes LCSC and DigiKey stock data, Tape & Reel vs. tray options, drop-in same-family alternates, and practical design notes not aggregated in any single distributor page.

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PIC18LF27J13T-I/SS

PIC18LF27J13T-I/SS - 128KB Flash 8-bit MCU 48MHz SSOP-28 | Microchip

The Microchip Technology PIC18LF27J13T-I/SS is an 8-bit PIC microcontroller from the PIC18 J-series family, featuring 128 KB of Flash program memory, 4 KB of RAM, and a 48 MHz internal CPU delivering up to 12 MIPS of performance. The device is housed in a 28-pin SSOP (5.30 mm / 0.209 in body width) package and is supplied in Tape & Reel (T/R) packaging for high-volume assembly. The /LF prefix indicates a low-voltage variant operating down to 2.0 V, paired with the nanoWatt XLP extreme-low-power technology for battery-conscious designs. An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, optimized for embedded control tasks such as sensor interfacing, motor control, and human-machine interfaces. Within the broader hierarchy, microcontrollers sit below microprocessors and belong to the power management and embedded systems domain. The PIC18 family uses a modified Harvard architecture with separate program and data buses, and the J-series specifically adds peripherals such as a 12-bit ADC, comparators, and enhanced PWM/capture modules while keeping the same PIC18 instruction set. Key features include a 10-channel 12-bit ADC with automated Channel Scan mode, dual analog comparators, four 16-bit timers, two Capture/Compare/PWM (CCP) modules plus one Enhanced CCP (ECCP), two USART modules with LIN support, two SPI/I2C-compatible MSSP peripherals, and an integrated hardware RTCC. The /LF supply range of 2.0 V to 3.6 V makes the part drop-in compatible with single-cell Li-ion or two-cell alkaline battery rails. nanoWatt XLP technology delivers sleep currents in the nanoamp range, enabling years of operation on a single coin cell. The CPU executes a 16-bit instruction word over an 8-bit data bus, with a hardware multiplier and C-friendly architecture that supports pointer manipulation and a software stack. An integrated 31 kHz internal oscillator and a 48 MHz internal RC oscillator eliminate the need for an external crystal in cost-sensitive designs, while a PLL provides 48 MHz from the 4 MHz INTOSC source. Typical applications include portable medical monitoring devices, IoT sensor nodes, USB-to-UART bridges (using the MSSP/USART peripherals), low-power wireless HMI controls, and industrial sensor transmitters. The wide memory and peripheral set also suits appliance controllers and LED driver front-ends. When designing, verify the maximum I/O current budget per pin (typically 25 mA source/sink) and per port (typically 200 mA), and add adequate decoupling (0.1 uF + 10 uF) close to the VDD/VSS pairs. For low-power designs, follow Microchip TB1200 application note guidelines and use the deep-sleep watchdog and RTCC for wake-up events instead of polling. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the PIC18LF27J13T-I/SS that are not always present in the manufacturer datasheet summary.

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PIC18LF27J53-I/ML

PIC18LF27J53-I/ML - 128KB Flash USB 8-bit MCU 28-QFN | Microchip

The Microchip Technology PIC18LF27J53-I/ML is a low-power, high-performance 8-bit PIC18J-series microcontroller with integrated full-speed USB 2.0, 128KB Flash program memory, 4KB RAM, and a 48 MHz internal oscillator, housed in a 28-pin QFN (ML, 6x6 mm) package with exposed thermal pad. It targets cost-sensitive embedded designs that require USB connectivity, generous code space, and nanoWatt XLP power management for battery-backed applications. An 8-bit microcontroller (MCU) is a small, self-contained computing system on a single silicon die that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (RAM), and a rich set of peripheral blocks (timers, ADC, communication controllers, I/O). MCUs are the silicon building blocks of the embedded hierarchy: microcontroller -> embedded processor -> edge compute node -> IoT endpoint, and the PIC18 family sits in the mainstream 8-bit tier used for human-interface, motor-control, sensor-conditioning, and USB-connected consumer/industrial designs. Key specifications include 128KB (64K x 16) Flash, 4KB SRAM, a 10-bit ADC with up to 12 channels, multiple timers, PWM, I2C/SPI/UART/USART/USB, deep-sleep nanoWatt XLP modes, and an operating voltage of 2.0 V to 3.6 V (LF variant). The 28-pin QFN footprint and industrial -40C to +85C temperature range suit compact, fan-less, USB-equipped designs such as HID peripherals, point-of-sale terminals, and low-cost data loggers. The PIC18LF27J53 architecture combines a RISC-style 8-bit core with a 16-bit instruction path, hardware multiplier, C-friendly compiler support (XC8), and self-programming Flash for in-field firmware updates. Its deep-sleep current is in the nanoamp range, enabling years of standby operation from small coin-cell or Li-ion batteries. Typical applications include USB Human Interface Devices (HID), sensor/IoT nodes, portable medical accessories, industrial control panels, low-cost instrumentation, and consumer devices that require a reliable USB stack with low active and standby power draw. When designing with this part, plan the PCB layout to expose the exposed pad (EP) to a copper pour for thermal relief and ground return, place the 12 MHz external crystal (if used for USB accuracy) within a few millimeters of the OSC pins, and route the USB D+/D- pair as a 90-ohm differential with matched length to maintain USB compliance. This page synthesizes distributor pricing, drop-in QFN-28 alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC18LF27J53-I/SO

PIC18LF27J53-I/SO - 128KB Flash USB MCU | Microchip 28-SOIC

The Microchip Technology PIC18LF27J53-I/SO is a low-power, high-performance 8-bit microcontroller from the PIC18 J-series with integrated full-speed USB 2.0, 128 KB of Flash program memory, 4 KB of RAM, and a 12 MIPS CPU core, housed in a 28-pin SOIC package (SO-28, 7.50 mm width). An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash), data memory (RAM), and peripherals on one silicon die. In the system hierarchy it sits below microprocessors and FPGAs but above discrete logic, and is widely used in cost-sensitive embedded products where deterministic real-time control and ultra-low standby power are required. The PIC18 J-series specifically targets USB-enabled embedded designs and ultra-low-power (nanoWatt XLP) battery applications. Key features of the PIC18LF27J53 include a 48 MHz internal oscillator (12 MIPS instruction throughput), 128 KB self-programmable Flash, 4 KB RAM, on-board full-speed USB 2.0 device/host/OTG transceiver, a 10-bit ADC with up to 13 input channels, two analog comparators, four timers, two CCP/ECCP modules, I2C, SPI, and UART peripherals, plus deep-sleep nanoWatt XLP modes. The 28-pin SOIC (SO-28) package exposes 22 I/O pins suitable for moderately complex user interfaces and USB cable applications. Architecturally, the PIC18LF27J53 uses an enhanced Harvard architecture with a 16-bit instruction word and 8-bit data path, allowing single-cycle execution except for branches. The integrated USB 2.0 SIE eliminates external transceiver cost, while the deep-sleep mode reduces current consumption to microamp levels for battery-powered designs. Typical applications include USB human-interface devices (HID keyboards, mice, gamepads), USB-to-UART bridges, portable data loggers, low-power sensor nodes with USB charging, and industrial control panels. The wide 2.0V to 3.6V operating range (LF variant) suits single-cell Li-ion or 3.3V regulated supplies. With its USB capability, ample Flash, and industrial -40C to +85C operating range, the PIC18LF27J53-I/SO bridges cost-sensitive consumer designs and certified industrial systems. When designing with this part, ensure the USB D+/D- traces are 90 ohm differential matched and the VUSB pin has a 0.47 uF decoupling capacitor per the Microchip reference schematic. Developers should also enable the PLL only after stable VDD to avoid USB enumeration failures during brown-out events. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC18LF27J53-I/SP

PIC18LF27J53-I/SP - 8-bit 48MHz USB MCU, 128KB Flash | Microchip

The Microchip Technology PIC18LF27J53-I/SP is an 8-bit PIC microcontroller featuring 128 KB Flash program memory, 4 KB RAM, and an integrated full-speed USB 2.0 transceiver, packaged in a 28-pin SPDIP (0.300" wide plastic DIP). Operating up to 48 MHz (12 MIPS) from a 2.0-3.6 V supply, the 'LF' variant of the PIC18 J-series delivers high performance at low power. An 8-bit microcontroller (MCU) is a programmable single-chip computer that processes data in 8-bit units and integrates CPU, RAM, non-volatile Flash memory, and peripherals such as timers, ADC, and communication interfaces. Within the broader semiconductor hierarchy, the PIC18LF27J53 belongs to the PIC18 family (8-bit PIC RISC architecture) -> microcontroller -> microcontrollers & processors -> integrated circuit. The 'LF' prefix designates the low-voltage (2.0-3.6 V) variant, suitable for battery-powered designs, while 'J53' marks the USB-enabled sub-family with nanoWatt XLP technology. Key features include 128 KB self-programmable Flash, 4 KB RAM, an integrated USB 2.0 full-speed transceiver, 10-bit ADC with up to 13 channels, two comparators, three 16-bit timers, two UART, two SPI, two I2C, and nanoWatt XLP power management with deep sleep. The device supports up to 25 mA source/sink on I/O and includes CTMU for capacitive touch sensing. The PIC18LF27J53 uses Microchip's enhanced Harvard RISC architecture with a modified 16-bit instruction word executed in two bytes of Flash, achieving 12 MIPS at 48 MHz while consuming only nanoWatts in sleep. The integrated USB 2.0 SIE eliminates external PHY requirements and the on-chip 3.3 V regulator simplifies dual-rail designs. Typical applications include USB peripherals (HID, CDC, custom device classes), low-power sensor nodes with USB charging, capacitive touch user interfaces, industrial data loggers, and consumer electronics requiring USB connectivity with extended battery life. When designing with this part, observe the 2.0-3.6 V supply constraint for the 'LF' variant and the 28-pin SPDIP footprint's through-hole clearance. For SMT designs, consider the SOIC-28 and QFN-28 package variants within the same PIC18LF27J53 family.

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PIC18LF27J53T-I/ML

PIC18LF27J53T-I/ML - 128KB Flash USB 8-bit MCU | Microchip

The Microchip Technology PIC18LF27J53T-I/ML is a low-power 8-bit PIC microcontroller from the PIC18LFXXJ53 family with integrated USB 2.0 full-speed support, 128 KB of flash program memory and 3.8 KB of RAM, housed in a 28-pin QFN (6x6 mm) package with an exposed thermal pad. It operates up to 48 MHz (12 MIPS), features 22 digital I/O lines, and includes a 12-bit ADC with up to 10 channels plus multiple serial interfaces such as SPI, I2C and USART (with LIN support). The "LF" prefix indicates the wide 2.0V to 3.6V core voltage range designed for battery-backed designs. A microcontroller (MCU) is an integrated circuit containing a CPU core, program memory, RAM, peripherals, and I/O on a single silicon die. PIC18 microcontrollers use Microchip's enhanced Harvard RISC architecture, which separates program and data buses for higher instruction throughput. Within that hierarchy, the PIC18LF27J53 belongs to the XLP (eXtreme Low Power) "J53" sub-family - microcontrollers with USB peripherals optimized for portable and consumer applications. Typical J53 devices run from 2.0V to 3.6V and incorporate nanoWatt XLP sleep modes for battery-friendly operation. Key features of the PIC18LF27J53T-I/ML include the integrated USB 2.0 full-speed transceiver and SIE (which eliminates the need for an external PHY), 128 KB self-programmable flash with 1 KB of EEPROM endurance data, and 22 general-purpose I/O pins with interrupt-on-change capability. Additional integrated peripherals include two analog comparators, a 12-bit ADC with up to 10 channels, an RTCC, and four 16-bit timers. The "-I" suffix denotes the industrial -40C to +85C operating temperature range. The device uses a 16-bit modified Harvard RISC core with an 8-level hardware stack and 31-level software stack, delivering 12 MIPS performance at 48 MHz. Internal oscillator options include a precision 8 MHz HFINTOSC and a 31 kHz LFINTOSC, simplifying designs by eliminating external crystals in many cases. The QFN-28 package's exposed pad provides a low thermal resistance path and must be soldered to the PCB ground plane for reliable operation. Typical applications for this part include USB HID peripherals, USB-to-UART bridges, low-power data loggers, sensor hubs, consumer electronics with USB charging interfaces, and human-interface devices (keyboards, mice, game controllers). Industrial uses include battery-backed monitoring nodes and portable instrumentation. The part is also suitable for educational development boards and rapid prototyping because of its combination of USB, ADC, and serial peripherals. When designing with the PIC18LF27J53T-I/ML, pay attention to the 3.3V rail: USB signaling and core logic both require a regulated 3.3V supply, and the LF variant tolerates down to 2.0V when USB is disabled. The exposed thermal pad must be soldered to the ground plane to keep the junction within safe limits, and the internal oscillator accuracy may require calibration for USB compliance at low temperatures. This page consolidates verified distributor pricing, drop-in alternatives from Microchip's PIC18LF27J53 family and other pin-compatible 8-bit MCUs, and practical design notes that complement the manufacturer datasheet - synthesized specifically for embedded engineers selecting a USB-capable low-power MCU in QFN-28.

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PIC18LF27J53T-I/SO

PIC18LF27J53T-I/SO - 128KB Flash USB 8-bit MCU 28-SOIC | Microchip

The Microchip PIC18LF27J53T-I/SO is a low-power, high-performance 8-bit PIC microcontroller with integrated full-speed USB 2.0, 128 KB of Flash program memory and 4 KB of RAM, operating at up to 48 MHz (12 MIPS) in a 28-pin SOIC package. It belongs to the PIC18 J-series family and combines nanoWatt XLP deep-sleep modes with a 12-bit ADC and rich peripheral set for cost-sensitive USB-enabled embedded designs. What is an 8-bit PIC microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer that processes data 8 bits at a time, integrating a CPU, program memory (Flash), data memory (RAM), non-volatile EEPROM, and peripherals on one die. Within the Microchip taxonomy, this part belongs to the PIC18 family -> PIC18J sub-family -> PIC18LF27J53 USB series, all sharing the same Harvard RISC core architecture optimized for low power and deterministic interrupt response. Key features include 128 KB self-programmable Flash with 64K x 16 organization, 3.8 KB RAM, an integrated full-speed USB 2.0 device/host/OTG transceiver, a 10-channel 12-bit ADC, multiple Enhanced USART, I2C and SPI interfaces, and four timers. The nanoWatt XLP technology provides deep-sleep currents under 100 nA, enabling battery-powered designs that still wake on USB attach events. The device uses a modified Harvard architecture with a 16-bit instruction word and 8-bit data path, supported by a C-compiler-friendly instruction set. The integrated USB SIE handles low-level protocol autonomously, freeing the CPU for application logic. Wide operating voltage from 2.0 V to 3.6 V on the LF (low-voltage) variant enables direct Li-ion battery operation without external regulators. Typical applications include USB HID peripherals such as keyboards, mice and game controllers, USB-to-UART bridges, data loggers with USB connectivity, low-power sensor nodes with USB charging, and consumer electronics requiring plug-and-play USB device functionality. Industrial HMI panels and medical instrumentation also leverage the integrated USB for firmware updates and data export. When designing with this MCU, allocate sufficient PCB area for the 28-SOIC decoupling network and route the USB D+/D- pair as a 90-ohm differential pair. Configure the on-chip voltage regulator carefully: the LF variant requires an external 3.3 V rail for the core, while the F variant includes an internal 2.5 V regulator. This page synthesizes verified distributor pricing, pin-compatible drop-in alternatives, and practical design notes not assembled in the manufacturer datasheet alone.

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PIC18LF27J53T-I/SS

PIC18LF27J53T-I/SS - 48MHz USB MCU 128KB Flash SSOP-28 | Microchip

The Microchip Technology PIC18LF27J53T-I/SS is a low-power, high-performance 8-bit PIC18 microcontroller with integrated full-speed USB 2.0, 128 KB of flash program memory, 3.8 KB of RAM, and a 48 MHz internal oscillator, housed in a 28-pin SSOP (SS) package supplied on tape-and-reel. What is a PIC18 J-series microcontroller? The PIC18 J-series is Microchip's family of 8-bit CMOS flash microcontrollers built on an enhanced RISC architecture with a 16-bit instruction word. It belongs to the broader PIC18 product line (8-bit MCU -> microcontroller -> embedded controller -> semiconductor). The "LF" prefix indicates the low-voltage F-variant core (2.0 V to 3.6 V), and the "J53" sub-family adds a USB 2.0 full-speed transceiver and a 12-bit ADC with up to 16 channels. Key features of the PIC18LF27J53T-I/SS include up to 16 MIPS throughput at 48 MHz, 200 ns single-cycle instruction execution, integrated USB 2.0 full-speed (12 Mbps) transceiver, 12-bit ADC with up to 16 channels, two analog comparators, CTMU for capacitive touch sensing, and nanoWatt XLP power management with deep-sleep current of approximately 20 nA. The device supports I2C, SPI, and two enhanced USARTs for asynchronous and synchronous serial communications. The architecture combines a 16-bit program counter with an 8-bit data path, a hardware multiplier, and a four-deep stack. The 128 KB flash is organized as 64K x 16 words and supports self-programming under firmware control. Internal oscillator blocks include a 31 kHz LF-INTLF source and a software-tunable HF-INTOSC for low-power standby and full-speed operation. Typical applications for the PIC18LF27J53T-I/SS include USB HID peripherals such as mice, keyboards, and game controllers; capacitive-touch user interfaces; low-cost data loggers with USB CDC connectivity; sensor conditioning with the CTMU; and consumer devices such as toys, remote controls, and small appliances. The deep-sleep mode extends battery life for always-on sensor front-ends. Design consideration: the USB D+/D- lines require 27 ohm series resistors close to the IC and a 90 ohm differential characteristic impedance on the PCB. VUSB must be decoupled with at least 0.47 uF and the internal 3.3V USB regulator disabled when the system is bus-powered above 3.6V. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including cross-brand equivalence analysis and SSOP-28 pin-compatibility guidance.

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PIC18LF27K40-E/SO

PIC18LF27K40-E/SO - 128KB Flash 8-bit MCU, 64MHz | Microchip

The Microchip PIC18LF27K40-E/SO is an 8-bit PIC® XLP™ microcontroller delivering 64 MHz CPU performance with 128 KB Flash, 4 KB RAM and 256 B EEPROM in a 28-SOIC wide-body package. The device operates across a 1.8 V to 3.6 V supply range and integrates rich analog and digital peripherals including a 10-bit ADC, 5-bit DAC, comparators, PWM, CCP, CWG, HLT, WWDT, SCAN/CRC and ZCD. This combination of low-power XLP technology and 5 V-tolerant I/O targets general-purpose embedded designs. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, typically integrating a CPU core, non-volatile program memory, volatile RAM, EEPROM, digital I/O and a mix of on-chip peripherals such as ADCs, timers and communication interfaces. The PIC18LF family sits inside Microchip's 8-bit PIC® hierarchy, positioned for cost-sensitive, low-power applications that need more memory and peripherals than baseline PIC10/PIC12/PIC16 parts while retaining the simplicity of an 8-bit C-optimized core. Key features of the PIC18LF27K40 include Core Independent Peripherals (CIPs) such as the Complementary Waveform Generator (CWG), Windowed Watchdog Timer (WWDT) and CRC/SCAN hardware, plus XLP nanoWatt sleep modes that drop quiescent current to the nanoampere range. The 128 KB Flash supports self-programming and large application code, while the 10-bit ADC with internal channels, the 5-bit DAC and configurable comparators enable closed-loop sensor and motor drive designs without external analog ICs. The 28-SOIC package gives a 0.295" (7.50 mm) wide-body footprint that is hand-solderable and friendly to low-cost two-layer boards. Typical applications include low-power IoT endpoints, battery-powered sensor nodes, white goods and HVAC control panels, automotive body and lighting modules, and small industrial control boards. Designers select the 'LF' variant specifically because of its lower VDD range (down to 1.8 V) versus the PIC18F27K40, making it compatible with single-cell Li-ion or 2x AA primary cells. When designing with this MCU, place decoupling capacitors (100 nF plus bulk 1-10 uF) within a few millimetres of VDD pins and route analog references (VREF+/VREF-) as guarded traces away from switching signals. The 'E' suffix denotes the -40 °C to +125 °C extended operating temperature grade suitable for industrial and automotive environments.

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PIC18LF27K40-E/SP

PIC18LF27K40-E/SP - 8-bit 64MHz 128KB Flash XLP MCU | Microchip

The Microchip Technology PIC18LF27K40-E/SP is an 8-bit PIC18 XLP microcontroller running up to 64 MHz with 128 KB Flash, 4 KB RAM, and 256 B EEPROM, housed in a 28-pin SPDIP (SP) through-hole package. The 'LF' prefix denotes the low-power (1.8V-3.6V) core, while 'F' variants operate 2.3V-5.5V; the 'E' suffix indicates the -40C to +125C extended operating temperature grade, suiting industrial control, white goods, and automotive under-hood nodes. An 8-bit PIC microcontroller is a Harvard-architecture RISC CPU with separate program and data buses, on-chip Flash for code storage, integrated peripherals, and a 16-bit instruction set designed for deterministic real-time control. PIC18F/K devices sit in the middle of Microchip's 8-bit MCU portfolio - more capable than PIC10/12/16 baseline parts, simpler than PIC24/dsPIC 16-bit families. The PIC18 K-series ('K40') adds Core Independent Peripherals (CIPs): CWG, CCP, PWM, 10-bit ADC with Computation (ADC2), 5-bit DAC, comparators, zero-cross detect (ZCD), CRC/SCAN, and a windowed watchdog (WWDT) that offload timing-critical tasks from the CPU and reduce firmware complexity. Key features include the eXtreme Low Power (XLP) picoPower core with deep sleep currents down to the 50 nA range, an integrated 32 kHz low-power RTCC oscillator, on-chip 32 MHz HFINTOSC with 0.25% calibration, a 24-channel 10-bit ADC, and configurable logic cell (CLC) blocks. The device supports up to 25 I/O pins with peripheral pin select (PPS) routing, plus SPI/I2C/UART with DMA-style buffer access. Programming is via ICSP and the device is supported by MPLAB X IDE, XC8 compilers, and the MPLAB Code Configurator (MCC) for graphical peripheral setup. The architecture uses a pipelined 8-bit data path with a 16-bit instruction word and a hardware multiplier, giving 64 MHz throughput at 16 MIPS. Internal dual oscillators plus a 4x PLL eliminate many external crystals in cost-sensitive designs. The 'K40' family emphasizes deterministic I/O: every peripheral trigger can wake the CPU, run autonomously, and return to sleep without software intervention - useful in battery sensors that must sleep 99.9% of the time. Typical applications include battery-powered IoT sensor nodes, smart metering, HVAC and thermostat controls, white-goods user modules, automotive body and lighting controllers (under-hood LIN nodes when paired with a transceiver), and USB-touch human-machine interface panels. The wide VDD range and extended temperature grade also suit industrial sensor transmitters and low-end motor-control subsystems using the CWG and CCP/PWM peripherals. When designing with this MCU, route PPS carefully - peripherals can be remapped to most I/O, but only one function per pin at a time, and remap must match the schematic. Decouple VDD/VSS pairs with 100 nF plus bulk capacitance, place the 32.768 kHz crystal close to SOSCO/SOSCI pins when using RTCC, and budget at least 4 KB stack/heap above MCC-generated initialization. The E/SP package is also footprint-compatible with other PIC18F27K40 SPDIP variants, easing upgrade paths. This page synthesizes distributor pricing, drop-in alternatives, design notes, and an AEO-optimized FAQ drawn from the Microchip PIC18(L)F27/47K40 datasheet and live distributor listings - not a copy of the manufacturer PDF.

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PIC18LF27K40-I/ML

PIC18LF27K40-I/ML - 8-bit 64MHz XLP MCU 128KB Flash | Microchip

The Microchip Technology PIC18LF27K40-I/ML is an 8-bit PIC18K RISC microcontroller with 64 MHz CPU speed, 128 KB Flash program memory, and a 6x6 mm 28-pin QFN package, designed around Microchip's eXtreme Low Power (XLP) technology platform. The device combines large memory, rich analog and digital peripherals, and 1.8-3.6V wide-range supply support to suit battery-powered and industrial general-purpose applications. The 'LF' prefix denotes the low-voltage F-series process node optimized for ultra-low-power operation, while the 'I' temperature grade supports industrial -40C to +85C ambient operation. What is a PIC18 Microcontroller? The PIC18 family is Microchip's 8-bit C-optimized RISC architecture, positioned above the PIC16 family and below the PIC24/dsPIC 16-bit families. PIC18 devices use a 16-bit instruction word, an 8-bit data path with hardware multiplier, hardware stack, and rich peripheral integration (ADC, PWM, CCP, CWG, EUSART, MSSP I2C/SPI). The 'LF' sub-series adds XLP technology with sub-uA sleep currents and IDLE/DOZE power modes. The PIC18LF27K40 specifically targets applications that demand large Flash/RAM, 5V-tolerant mixed-signal IO, and Core Independent Peripherals (CIPs) such as Complementary Waveform Generator (CWG), Windowed Watchdog Timer (WWDT), and CRC/SCAN memory verification. Key features include 128 KB Flash, 3.7 KB RAM, 1 KB EEPROM, a 10-bit ADC up to 350 ksps with computation, multiple PWM/SCCP/DCCP channels, EUSART, two I2C/SPI MSSP ports, and DMA-to-memory for low-CPU-overhead data movement. The XLP subsystem supports Sleep currents below 1 uA with RTCC, watchdog, and interrupt wake-up, enabling multi-year coin-cell operation in sensor and metering designs. The 28-QFN (6x6 mm) package exposes an EP pad that must be soldered to a ground copper pour for thermal dissipation and electrical reference. The PIC18LF27K40 uses a 16-bit instruction set with 8-bit data bus, 31-level hardware stack, and a 2-cycle hardware divider. The internal 64 MHz oscillator can be software-tuned via OSCTUNE, and the auxiliary PLL supports USB-friendly 48 MHz and reference clock domains. Core Independent Peripherals - CWG, NCO, CLC, and DSM - allow complex waveform generation, signal modulation, and logic gating without CPU intervention, reducing firmware complexity and improving deterministic real-time response. Typical applications include low-power IoT sensor nodes, battery-backed instrumentation, industrial control front-ends, small appliance controllers, USB-CDC/HID human-interface devices, and remote controls. The wide 1.8-3.6V supply window lets designers run directly from a single Li-ion or two AA cells without a boost converter. For a designer choosing this part, the headline advantage is the integration of XLP technology with mid-density Flash and CIPs in a small 28-QFN footprint, eliminating the need for a separate low-power supervisory IC. The 28-QFN EP pad must be soldered to the PCB ground plane to meet thermal and EMI performance; omitting it can cause ADC offset drift and latch-up under temperature stress.

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PIC18LF27K40-I/SO

PIC18LF27K40-I/SO - 64MHz 128KB Flash 8-bit XLP MCU | Microchip

The Microchip Technology PIC18LF27K40-I/SO is an 8-bit PIC18 microcontroller built on the eXtreme Low Power (XLP) architecture, delivering up to 64 MHz of computational performance with 128 KB of Flash program memory in a 28-pin SOIC (300 mil) wide-body package. It provides 4 KB of RAM and 256 bytes of EEPROM, making it well suited to mixed-signal embedded designs where low active and sleep current are non-negotiable. The "LF" prefix indicates the 1.8 V to 3.6 V operating range, while the "F" sibling part (PIC18F27K40-I/SO) extends support to 5 V rails. According to the Microchip datasheet, the device integrates a 10-bit ADC with computation, a 5-bit DAC, three op-amps, comparators, CWG, PWM, CCP, HLT, WWDT, ZCD, and CRC/SCAN peripherals, allowing many functions to run without CPU intervention. The CMOS process, RISC-style 8-bit core, and rich Core Independent Peripheral (CIP) set let the part deliver deterministic response while keeping active current below 3 mA at full speed and sleep current in the nanoamp range with XLP retention. What is a low-power 8-bit microcontroller? A low-power 8-bit microcontroller is a single-chip computer that combines a CPU, non-volatile program memory, working RAM, data EEPROM, and multiple analog/digital peripherals on one die, optimized for minimal energy consumption. The PIC18LF27K40 belongs to the hierarchy: microcontroller -> 8-bit MCU -> PIC18 family -> XLP low-power subfamily -> 28-pin SOIC class. XLP technology adds deep-sleep modes with peripheral wake-up, enabling years of operation from a single coin cell in metering or remote-sensor designs. Key features include 128 KB self-programmable Flash with high endurance, hardware CRC and SCAN for functional safety, a 10-bit ADC with automated acquisition and threshold comparison, multiple communications peripherals (UART/SPI/I2C), and up to 25 I/O pins with interrupt-on-change capability. The 5-bit DAC and 3 op-amps eliminate the need for external analog components in many sensor-interface designs, reducing BOM cost and PCB area while improving noise immunity. Typical applications include battery-powered IoT sensor nodes, low-power wireless HMI panels, industrial process controllers, and portable medical monitors. The wide peripheral integration supports digital power conversion, motor control via PWM/CWG, and safety-critical signal monitoring using WWDT and ZCD. When designing with this part, verify the Vdd range: the LF variant tops out at 3.6 V, so a 5 V rail must use the F-suffix. Add a 0.1 uF decoupling capacitor within 5 mm of each power pin and follow Microchip AN1252 for low-power PCB layout. The integrated CIP peripherals let you replace several discrete components with deterministic hardware state machines.

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PIC18LF27K40-I/SP

PIC18LF27K40-I/SP - 128KB Flash 8-bit MCU, 28-SPDIP | Microchip

The Microchip Technology PIC18LF27K40-I/SP is an 8-bit PIC® XLP™ microcontroller featuring 128 KB Flash, 4 KB RAM, and 256 B EEPROM, operating up to 64 MHz in a 28-pin SPDIP through-hole package. It belongs to the PIC18LF27K40 family with a 1.8 V to 3.6 V operating voltage range, making it ideal for battery-powered and low-voltage designs. The device includes rich Core Independent Peripherals such as a 10-bit ADC, 5-bit DAC, comparators, PWM, CCP, CWG, WWDT, CRC/SCAN, ZCD, and PPS-mapped EUSART/SPI/I2C. A PIC18 microcontroller is an 8-bit Harvard-architecture MCU built around an enhanced RISC core with hardware multiply, designed for embedded control applications that need deterministic interrupt latency and abundant I/O. PIC18F devices sit in the broader PIC family hierarchy: PIC10/12/16/18 -> 8-bit MCU -> microcontroller -> embedded IC -> semiconductor. The 'LF' prefix indicates the low-voltage (1.8–3.6 V) variant with eXtreme Low Power (XLP) technology, which delivers nanoWatt sleep currents, while the 'F' prefix operates at 2.3–5.5 V. Both are functionally compatible on the same package footprint. Key features of the PIC18LF27K40 include 25 digital I/O pins, four 16-bit timers, two comparators with selectable references, a 10-bit ADC with computation (ADC2) oversampling, a 5-bit DAC, Zero-Cross Detection (ZCD), and configurable Complementary Waveform Generator (CWG) for power-driver control. The Peripheral Pin Select (PPS) allows flexible remapping of digital peripherals to any I/O, easing PCB layout. Architecturally, the device integrates a 16-level hardware stack, self-programming Flash with read-while-write, and idle/doze/peripheral module disable (PMD) modes for power tuning. The XLP technology enables deep sleep currents in the nanoampere range, supporting coin-cell applications. Typical applications include industrial sensor nodes, low-power IoT end-points, consumer appliance control, battery-powered instrumentation, motor control signal conditioning, and automotive body/comfort subsystems. Designers benefit from the peripheral integration that minimizes external components. When laying out, ensure the VDD/VSS pair has 0.1 µF decoupling placed within 5 mm of each pin and respect the ICSP™/ICD pinout for in-circuit programming. The wide 1.8–3.6 V supply enables direct Li-Ion or 2× AA operation without a separate regulator. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on a single distributor page or the bare datasheet summary.

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PIC18LF27K40-I/SS

PIC18LF27K40-I/SS - 128KB Flash 8-bit MCU, XLP | Microchip

The Microchip Technology PIC18LF27K40-I/SS is an 8-bit PIC18 microcontroller built on an enhanced RISC architecture with C compiler optimization, delivering up to 64 MHz performance in a 28-pin SSOP package. The device integrates 128 KB of Flash program memory, 4 KB of SRAM, and 256 bytes of EEPROM, providing ample headroom for application code, data buffering, and non-volatile parameter storage. The term MCU stands for Microcontroller Unit, a single-chip computer containing a CPU core, memory, and programmable input/output peripherals. The PIC18 family sits within Microchip's 8-bit microcontroller portfolio, which favors deterministic instruction execution, low power consumption, and ease of use. Within this family, the LF prefix denotes a wide-voltage variant supporting 1.8 V to 3.6 V operation, while the absence of F (PIC18F27K40) marks a 2.0 V to 5.5 V range. Both belong to the broader K40 sub-family designed for Xtreme Low Power (XLP) applications. Key features of the PIC18LF27K40-I/SS include a 10-bit ADC with Computation (ADCC) supporting automated Capacitive Voltage Divider (CVD) techniques for touch sensing, a 5-bit DAC, two comparators, a Complementary Waveform Generator (CWG), PWM modules, CCP modules, a Windowed Watchdog Timer (WWDT), CRC/SCAN memory scanners, and a Zero-Cross Detect (ZCD) peripheral. The integrated Core Independent Peripherals allow deterministic hardware-driven tasks without CPU intervention, reducing firmware complexity and power consumption. Two I2C, two SPI, and two UART interfaces support common wired communication needs. The device's 64 MHz internal oscillator combined with XLP nanWatt technology achieves typical sleep currents below 50 nA, making it suitable for battery-powered sensors that must operate for years on a single cell. With 128 KB of Flash, the PIC18LF27K40 can host over-the-air update bootloaders, USB stacks (CDC/HID), or display-rich user interfaces while leaving headroom for application logic. CIP peripherals such as the CWG enable hardware-driven motor control, while the ADCC simplifies touch and sensor acquisition without CPU wakeup. Typical applications include consumer and industrial IoT sensor nodes, capacitive touch user interfaces, battery-powered remote controls, home automation controllers, low-power metering, and small motor/pump drivers. Designers appreciate the LF voltage range when powering directly from a single lithium coin cell. When designing with the PIC18LF27K40-I/SS, ensure that supply voltage stays within the LF window of 1.8 V to 3.6 V; for 5 V rails, choose the PIC18F27K40-I/SS instead. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the pin. Configure unused I/O as digital outputs low to minimize transient current. According to the Microchip datasheet, programming and debugging rely on the standard ICSP interface via PGC/PGD. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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PIC18LF27K40T-I/ML

PIC18LF27K40T-I/ML - 128KB Flash 8-bit XLP MCU | Microchip

The Microchip Technology PIC18LF27K40T-I/ML is an 8-bit PIC18 XLP family microcontroller running up to 64 MHz, integrating 128 KB of Flash, 4 KB of RAM, and 1 KB of EEPROM in a 28-pin VQFN (6x6 mm) surface-mount package. The device provides 25 general-purpose I/O, a 10-bit ADC2 with hardware CVD, a 5-bit DAC, two comparators, multiple CCP/PWM channels, CWG, HLT, WWDT, CRC/Memory Scan, Zero-Cross Detect (ZCD), and Peripheral Pin Select (PPS), along with EUSART, SPI, and I2C communication peripherals. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile working memory (RAM), EEPROM for data retention, and a rich peripheral set into one IC. The PIC18F/LF family uses Microchip's enhanced 8-bit modified Harvard architecture, sitting between simple 8-bit controllers (PIC10/12/16) and 16-bit dsPIC devices in Microchip's lineup. The XLP (eXtreme Low Power) technology branch of PIC18 specifically targets battery-powered and energy-harvesting designs, where nanoWatt sleep currents and active-mode efficiency determine battery life. The PIC18LF27K40T-I/ML operates from 1.8 V to 3.6 V, distinguishing the LF (low-voltage F) variant from the standard F variant that runs up to 5.5 V. Core Independent Peripherals (CIPs) such as CWG, CRC/Memory Scan, and ZCD can execute complex timing, signal generation, and safety functions in hardware without CPU intervention, reducing firmware complexity and power consumption. PPS allows most digital peripherals to be remapped to a wide range of I/O pins, simplifying PCB routing and BOM reuse across board variants. Typical applications include IoT sensor nodes, battery-powered instrumentation, low-energy wireless controllers (LoRa, Sub-GHz, BLE front-ends), HVAC and building automation, white-goods user interfaces, and general-purpose embedded control. The combination of 128 KB Flash and PPS also makes the part well-suited to designs where firmware is still evolving during product validation. When designing with the LF variant, ensure the supply stays within the 1.8 V to 3.6 V window - the part will not survive a 5 V input. A 0.1 uF decoupling capacitor placed within a few millimeters of the VDD pin is required, plus a bulk capacitor on the analog supply if the ADC2 is in use. Watch the QFN exposed pad: it must be soldered to the ground plane for thermal dissipation and electrical reference. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, application notes, and PCB design considerations beyond the raw datasheet summary, giving an engineer a complete decision snapshot for a 28-pin VQFN PIC18 design.

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PIC18LF27K40T-I/SO

PIC18LF27K40T-I/SO - 64MHz 8-Bit XLP MCU 128KB Flash | Microchip

The Microchip Technology PIC18LF27K40T-I/SO is an 8-bit PIC® XLP™ 18K microcontroller IC operating at 64 MHz with 128 KB (64K x 16) of Flash program memory, housed in a 28-pin SOIC package. It integrates 4 KB of RAM, 256 B of EEPROM, a 10-bit ADC, 5-bit DAC, comparators, PWM, CCP, CWG, HLT, WWDT, and SCAN/CRC peripherals, and supports Core Independent Peripherals for offloading CPU tasks. A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory (Flash), working RAM, and a rich set of on-chip peripherals such as timers, ADC/DAC, communication interfaces, and GPIO. Within the broader semiconductor taxonomy, an MCU sits inside the digital IC family, which itself is part of the integrated circuits hierarchy. The PIC18 family is Microchip's 8-bit mainstream architecture, distinguished by a RISC-like instruction set, deterministic interrupt latency, and the XLP (eXtreme Low Power) feature set designed for battery-powered products. Key features of the PIC18LF27K40 include the wide 1.8V to 5.5V operating range that supports both 3.3V and 5V rails, deep-sleep currents in the nanoamp range for XLP applications, hardware CRC and memory scan blocks for functional safety, and the 64 MHz internal oscillator that eliminates the need for an external crystal in cost-sensitive designs. The 28-pin SOIC package is a JEDEC-standardized wide-body outline (.300 inch / 7.5 mm body width) widely supported by hand-solder and reflow processes. The device leverages the PIC18 enhanced mid-range core with a modified Harvard architecture, providing separate program and data buses for predictable instruction throughput. Its Core Independent Peripherals, such as the CWG (Complementary Waveform Generator), allow complex waveform synthesis without CPU intervention, while the configurable logic cell enables glue-logic replacement. Hardware math accelerators and zero-cycle context switching help optimize real-time performance. Typical applications include low-power IoT sensor nodes, battery-powered consumer electronics, industrial control and HMI nodes, USB-to-UART bridge dongles, automotive body and interior modules, and white-goods motor control. The combination of XLP nanoWatt sleep modes, ample Flash, and rich analog peripherals makes it suitable for any 5V-tolerant design where energy budget is critical. When designing with this device, choose the appropriate operating voltage range (1.8V-3.6V for LF, or up to 5V for F variant) and provide adequate decoupling on VDD/AVDD. The 28-pin SOIC footprint simplifies hand-prototyping, and the on-chip debug (ICD) interface allows in-circuit programming without removing the device from the board. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet, enabling engineers to evaluate the PIC18LF27K40T-I/SO quickly for new designs and BOM substitutions.

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PIC18LF27K40T-I/SS

PIC18LF27K40T-I/SS - 128KB Flash XLP 8-bit MCU | Microchip

The Microchip Technology PIC18LF27K40T-I/SS is an 8-bit PIC® XLP™ 18K microcontroller with 128 KB Flash, 4 KB SRAM, and 256 B EEPROM, housed in a 28-pin SSOP package and operating up to 64 MHz. The 'LF' prefix denotes the low-voltage (1.8 V to 3.6 V) variant, while the 'T' suffix indicates Tape & Reel packaging and 'I/SS' specifies the industrial temperature grade (-40 °C to +85 °C) and SSOP-28 footprint. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program storage and SRAM for data), and programmable peripherals onto one die. PIC microcontrollers use a modified Harvard RISC architecture and are programmed via Microchip's MPLAB X IDE with XC8 compilers. MCUs sit at the top of the embedded hierarchy: microcontroller -> embedded processor -> semiconductor IC, and are the brain of virtually every modern electronic product that needs local decision-making. Key features include eXtreme Low Power (XLP) technology for sub-uA sleep currents, a 10-bit ADC with Computation (ADC2), a 5-bit DAC, comparators, PWM, CCP, Complementary Waveform Generator (CWG), Hardware Limit Timer (HLT), Windowed Watchdog Timer (WWDT), and Cyclic Redundancy Check with memory SCAN (CRC/SCAN). The device integrates 25 I/O pins and supports up to 64 MIPS instruction throughput. The PIC18F27K40 family architecture combines a 16-bit opcode modified Harvard design with a 256-byte instruction cache, achieving deterministic interrupt response and predictable timing for real-time control loops. Integrated Core Independent Peripherals (CIPs) such as CWG and HLT allow complex waveform synthesis without CPU intervention, reducing firmware complexity and code size. Typical applications include IoT sensor nodes, battery-powered wearables, home automation, industrial sensor interfaces, and low-power wireless edge devices. The XLP low-power modes (sleep current typically < 50 nA with RTC running) make the part well-suited to energy-harvesting and EnergyStar-compliant products. When designing with this device, use the MPLAB Snap or PICkit 4 for in-circuit debugging via ICSP, plan a decoupling network (100 nF + 1 uF) close to VDD/AVDD/VBAT pins, and configure the CWG/CCP for fail-safe shutdown if used in motor control. Migration between PIC18F (5 V) and PIC18LF (3.3 V) variants requires reviewing the brown-out and voltage-regulator configuration bits. This page synthesizes distributor pricing, parametric comparison, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. All specifications below are extracted directly from the Microchip PIC18(L)F27K40 datasheet and verified distributor listings.

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PIC18LF27K42-E/ML

PIC18LF27K42-E/ML - 64MHz 8-bit XLP MCU, 128KB Flash | Microchip

The Microchip PIC18LF27K42-E/ML is an 8-bit PIC microcontroller from the PIC18(L)FxxK42 family, integrating 128KB of Flash program memory, 8KB of SRAM, and 1KB of EEPROM in a 28-pin QFN (6x6 mm) package. It executes instructions at up to 64MHz, providing roughly 16 MIPS of computational throughput while the 'LF' prefix designates operation from a 1.8V to 3.6V supply for low-power designs. The 'E' suffix indicates the Extended (-40C to +125C) operating temperature range, and '/ML' specifies the 28-QFN surface-mount package with an exposed thermal pad. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), volatile data memory (SRAM), EEPROM for parameter retention, and a rich set of peripherals such as timers, ADCs, communication interfaces and GPIOs. Within the broader taxonomy, this part sits as: PIC18 (8-bit CISC core) -> PIC microcontroller -> microcontroller -> embedded processor -> semiconductor. PIC18F devices are widely adopted for their deterministic instruction set, mature toolchain, and extensive peripheral integration for cost-sensitive embedded designs. Key features include the ADC2 (12-bit Analog-to-Digital Converter with Computation) supporting up to 35 external channels with automated post-processing, a 12-bit DAC, high-speed comparators, PWM modules, vector interrupts, DMA, the Memory Access Partition (MAP), the Device Information Area (DIA), and Core Independent Peripherals (CIPs) that offload tasks from the CPU. The XLP (eXtreme Low Power) technology enables sub-uA sleep currents suitable for battery-powered and energy-harvesting products. The 28-QFN package occupies only 36mm² of board area while providing an exposed thermal pad for improved heat dissipation at elevated ambient temperatures. Architecturally, the PIC18LF27K42 uses Microchip's enhanced Harvard 8-bit core with a 16-bit instruction word, 31-level hardware stack, and a vectored interrupt controller supporting prioritized interrupts and on-chip hardware DMA between peripherals and RAM. The ADC2's automated hardware oversampling, averaging, and threshold comparisons lower CPU overhead, while dedicated CIPs such as the CLC, NCO and PWM allow autonomous analog and timing operations even in Sleep mode. Typical applications include IoT sensor nodes, low-power wireless sensor networks, home automation controllers, portable medical monitors, industrial sensor interfaces, automotive interior lighting, and battery-powered instrumentation. The wide operating voltage and temperature ranges also suit industrial control and harsh-environment edge nodes. Designers should use the MPLAB X IDE with the MPLAB Code Configurator (MCC) for graphical peripheral setup, and select the PIC18F27K42 (F-series, 2.3V-5.5V) if the application must run from a 5V rail. Adequate decoupling on VDD and a solid ground plane beneath the exposed pad are recommended to maintain ADC accuracy and reduce EMI. This page synthesizes distributor pricing, drop-in alternatives, comparison parameters, and practical design notes not found in isolation on the manufacturer datasheet, providing a single-source reference for component evaluation and sourcing.

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PIC18LF27K42-E/SO

PIC18LF27K42-E/SO - 128KB Flash 8-bit MCU 64MHz 28-SOIC

The Microchip Technology PIC18LF27K42-E/SO is a low-power 8-bit PIC microcontroller in the PIC18 XLP family, integrating 128KB of Flash program memory, 8KB of SRAM, and 1KB of EEPROM, all in a 28-pin SOIC package. The device executes instructions at up to 64MHz from an internal oscillator, giving it roughly 16 MIPS of computational throughput for sensor conditioning, motor control, and human-interface tasks. The wide 1.8V to 5.5V operating range makes the LF (low-voltage) variant well suited for battery-powered applications where the standard PIC18F27K42 would otherwise exceed the rail. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and a configurable set of peripheral blocks. In the broader system hierarchy an MCU sits below microprocessors (which need external memory) but above bare digital logic, and the PIC18 family occupies the 8-bit RISC tier of that taxonomy. The 'LF' prefix denotes an extended-voltage variant that supports lower VDD rails than the standard 'F' revision, while 'K42' identifies the specific peripheral generation introduced by Microchip around 2020 with rich core-independent peripherals. Key features include a 12-bit ADC2 with automated channels scan, a 5-bit DAC, two comparators, an 8-bit timer cluster, PWM, CWG (complementary waveform generator), ZCD (zero-cross detect), DMA, vector interrupts, PPS (peripheral pin select), a WWDT windowed watchdog, and SCAN/CRC for memory integrity checks. Connectivity is covered by UART, SPI, and I2C peripherals, all software-remappable through PPS, which simplifies PCB layout when migrating pin assignments between PIC18 K42 variants. Typical applications include low-power IoT sensor nodes, battery-powered handheld instruments, LED lighting controllers, and consumer appliance control boards. The XLP (eXtreme Low Power) technology adds IDLE, DOZE, and peripheral-module-disable modes, allowing currents in the nanoampere range during sleep. Designers often pair the LF27K42 with a small LDO, a CR2032 or Li-Ion cell, and a 32.768kHz crystal for RTC-style timing, enabling multi-year battery life on coin cells. The 28-SOIC footprint also eases hand-soldering for prototyping and small-batch production. When designing with this part, ensure your toolchain targets the K42 family (XC8 2.32 or later with device packs), and verify the PPS mapping carefully during porting from PIC18F to PIC18LF variants. The 'E' temperature grade marks the -40C to +125C industrial range, matching most outdoor and automotive-cabin environments. This page synthesizes distributor pricing, K42-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC18LF27K42-E/SP

PIC18LF27K42-E/SP - 64MHz 8-Bit XLP MCU, 128KB Flash | Microchip

The Microchip Technology PIC18LF27K42-E/SP is an 8-bit RISC microcontroller from the PIC18F/LF2X/4X/5XK42 family, operating up to 64MHz with 128KB Flash, 8KB RAM, and 1KB EEPROM in a 28-pin SPDIP (0.300 inch / 7.62mm) through-hole package. It integrates a 12-bit ADC2 with Computation (ADC2), DAC, comparators, DMA, Zero-Cross Detect (ZCD), CWG, PWM, and Vector Interrupts for high-performance mixed-signal embedded control. An 8-bit microcontroller (MCU) is a small, low-power computer-on-a-chip built around an 8-bit data path. In the semiconductor hierarchy, MCUs sit inside the broad category of embedded processors -> microcontrollers -> 8-bit MCUs. The "PIC" prefix is Microchip's proprietary Harvard-architecture RISC core, while "18" denotes the high-performance family with linear memory, C-compiler friendliness, and rich peripherals. The "LF" letter indicates the low-voltage variant (1.8V-3.6V VDD), while the "K42" sub-family adds XLP (eXtreme Low Power) technology for battery-friendly designs. Key features of the PIC18LF27K42-E/SP include: 64MHz internal oscillator with PLL, 128KB self-programmable Flash (64K x 16 words), 8KB SRAM, 1KB EEPROM, 12-bit ADC2 with up to 24 channels, 5-bit/8-bit DAC, 2 comparators, DMA controller, vectored interrupts, Peripheral Pin Select (PPS), UART/SPI/I2C, Complementary Waveform Generator (CWG), High-Side Low-Side Timer (HLT), Windowed WWDT, CRC/SCAN, IDLE/DOZE/PMD power modes, and Math Accelerator (MAC). The 28-SPDIP footprint matches the legacy PIC18 28-pin DIP standard for breadboard-friendly prototyping and field replacement. Architecturally, the K42 series uses a 16-bit modified Harvard core with a 31-level hardware stack, hardware multiplier, and an interrupt controller supporting vectored priorities. Peripherals are mapped via the PPS matrix, which lets nearly any digital peripheral function be assigned to most I/O pins, simplifying PCB routing and BOM reuse across the family. Typical applications include low-power IoT sensor nodes, industrial control and HMI panels, automotive body and LIN nodes, battery-powered instrumentation, LED lighting controllers, USB-CDC human-interface devices, and consumer white-goods motor control. Designers favor this part when migrating legacy PIC18F code while gaining modern peripherals and aggressive low-power modes. When designing with this MCU, plan the VDD rail for 1.8V-3.6V (the LF variant), provide a 100nF decoupling capacitor near each power pin, and assign PPS mappings early in firmware to lock the PCB layout. For the automotive -E (extended) grade, ambient temperature spans -40°C to +125°C. This page synthesizes the official Microchip datasheet family specifications with verified distributor pricing, drop-in alternatives within the K42 family, and practical design notes not found in a single datasheet excerpt.

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PIC18LF27K40-I/ML - 8-bit 64MHz XLP MCU 128KB Flash | Microchip

PIC18LF27K40-I/SO - 64MHz 128KB Flash 8-bit XLP MCU | Microchip

PIC18LF27K40-I/SP - 128KB Flash 8-bit MCU, 28-SPDIP | Microchip

PIC18LF27K40-I/SS - 128KB Flash 8-bit MCU, XLP | Microchip

PIC18LF27K40T-I/ML - 128KB Flash 8-bit XLP MCU | Microchip

PIC18LF27K40T-I/SO - 64MHz 8-Bit XLP MCU 128KB Flash | Microchip

PIC18LF27K40T-I/SS - 128KB Flash XLP 8-bit MCU | Microchip

PIC18LF27K42-E/ML - 64MHz 8-bit XLP MCU, 128KB Flash | Microchip

PIC18LF27K42-E/SO - 128KB Flash 8-bit MCU 64MHz 28-SOIC

PIC18LF27K42-E/SP - 64MHz 8-Bit XLP MCU, 128KB Flash | Microchip