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PIC18LF4439-I/PT - 8-bit MCU, 12KB Flash, 40MHz | Microchip
PIC18LF4439-I/PT

PIC18LF4439-I/PT - 8-bit MCU, 12KB Flash, 40MHz | Microchip

The Microchip PIC18LF4439-I/PT is an 8-bit PIC18F-family microcontroller (MCU) with 12KB of Flash program memory, 640 bytes of RAM, and a 40 MHz maximum core clock speed, housed in a 44-pin TQFP (PT) package rated for the industrial -40C to +85C temperature range. The LF prefix indicates the wide-voltage (2.0V to 5.5V) variant suitable for battery and low-power embedded designs, while the integrated 10-bit ADC with eight input channels and three serial interfaces (I2C, SPI, USART) provide flexible analog and digital connectivity. The PIC18 is an 8-bit RISC microcontroller family manufactured by Microchip Technology. Built on an enhanced Harvard architecture with separate program and data buses, the PIC18 family delivers up to 10 MIPS performance at 40 MHz, executes a 16-bit instruction word from Flash memory, and offers an instruction set optimised for C compiler code density. Within the broader semiconductor hierarchy, an MCU belongs to the embedded processor category and is distinct from a microprocessor in that peripherals, memory and interrupt controllers are integrated on-chip, reducing BOM cost and PCB area in volume designs. Key features include the in-system programmable Flash (12KB / 6K x 16 words) accessed via ICSP, a 10-bit successive-approximation ADC with eight input channels, three independent serial peripherals (I2C, SPI, USART), one 8-bit and three 16-bit timers, and up to 32 digital I/O pins. The PWM module is enhanced for motor-control and power-conversion applications, while the Capture/Compare/PWM peripherals support input measurement and waveform generation. Architecturally, the PIC18LF4439-I/PT uses an enhanced 16-bit instruction set with hardware multiply, eight-level deep hardware stack, and a vectored interrupt controller with multiple priority levels. The wide 2.0V to 5.5V supply range allows operation from single-cell Li-ion, two-cell alkaline, or regulated 3.3V/5V rails. Internal oscillator modes and a Phase-Locked Loop (PLL) reduce external component count, while the nanoWatt power-managed modes support sleep currents down to nanoampere levels. Typical applications include industrial motor control, sensor signal conditioning, appliance controls, HVAC fan controllers, lighting ballasts, automotive body electronics (non-safety), medical instrumentation, and consumer white goods. The wide operating voltage makes it suitable for battery-powered portable devices, while the PWM and capture modules support closed-loop control of brushless DC motors and switched-mode power converters. When designing with this MCU, allow for the decoupling capacitor network and a minimum ICSP header footprint if in-field firmware updates are required. Ensure the trace lengths between the crystal or external clock source and the OSC pins are short and guarded to preserve signal integrity and minimise EMI. The internal RC oscillator is sufficient for non-timing-critical tasks but should be replaced with a crystal when UART or PWM accuracy is required. This page synthesizes distributor pricing, pin-compatible alternatives drawn from the same Microchip PIC18 family, and practical design notes - information not found in the standalone manufacturer datasheet and curated specifically for engineers sourcing PIC18LF4439-I/PT for new designs or service replacements.

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PIC18LF4439T-I/ML - 8-bit MCU, 12KB Flash, 40MHz, 44-QFN | Microchip
PIC18LF4439T-I/ML

PIC18LF4439T-I/ML - 8-bit MCU, 12KB Flash, 40MHz, 44-QFN | Microchip

The Microchip PIC18LF4439T-I/ML is an 8-bit RISC microcontroller belonging to the PIC18F family, featuring 12KB (6K x 16) of Flash program memory, 640 bytes of RAM, and 256 bytes of EEPROM, operating at up to 40 MHz from a 2.0V to 5.5V supply in a 44-pin QFN (8x8 mm) package. Tape-and-reel packaged for high-volume manufacturing, it provides 36 digital I/O pins, a 10-bit Analog-to-Digital Converter with up to 8 channels, multiple PWM modules, and Microchip's nanoWatt Technology for dynamic power management. The "LF" suffix indicates the low-voltage variant designed for 2.0V-5.5V operation, while the "F" core delivers the enhanced instruction set and C-friendly architecture of the PIC18 family. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, RAM, peripherals, and I/O on one die. The PIC18F family sits between Microchip's baseline PIC16 and the 16-bit dsPIC families, targeting applications that need more code space, more peripherals, and deterministic interrupt handling than an 8-bit baseline MCU but where cost and power must remain low. Within the power IC taxonomy, an MCU is a digital logic IC; within the broader semiconductor hierarchy it is part of the embedded computing category. Key features of the PIC18LF4439T-I/ML include a 40 MHz internal/external clock, hardware Multiply instruction, 16-bit wide instructions with an 8-bit data path, and 31-level hardware stack. The device integrates two CCP modules, one Enhanced CCP (ECCP) module for advanced PWM and full-bridge motor control, a USART with LIN support, an MSSP for SPI/I2C, and a 10-bit ADC with up to 8 channels. The nanoWatt Technology provides multiple idle/sleep modes that drop quiescent current below 1 microampere in deep sleep, enabling battery-friendly designs. The LF silicon process is optimized for low-voltage operation down to 2.0V, making the LF4439 suitable for 2x AA battery cells or single Li-ion applications with a 3.3V regulator. The 44-pin QFN (ML) package offers a compact 8x8 mm footprint with an exposed thermal pad for improved heat dissipation during sustained 40 MHz operation. Programming and in-circuit debugging are supported through Microchip's ICSP (In-Circuit Serial Programming) interface and the MPLAB ICD debugger family. Typical applications for the PIC18LF4439T-I/ML include motor control (BLDC, brushed DC, stepper) thanks to the ECCP full-bridge PWM, white goods and appliance control panels, low-power sensor nodes, USB-to-UART bridges where the USART is paired with an external USB transceiver, and industrial control requiring 5V-tolerant I/O. The part is particularly well suited to designs migrating from PIC16 to PIC18 without changing the supply voltage rail. When designing with this part, ensure the QFN exposed pad is soldered to a sufficient copper area (typically 1 square inch) for thermal dissipation. Decoupling must include a 100 nF ceramic on each power pin within 2 mm of the package, and a bulk 4.7-10 uF tantalum or ceramic on the main VDD rail. The configuration bits should be reviewed carefully to set the oscillator mode, watchdog state, and code protection before programming. This page consolidates distributor pricing, drop-in pin-compatible alternatives from Microchip's PIC18 family, and practical design notes that go beyond what the manufacturer datasheet alone provides.

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PIC18LF4439T-I/PT - 8-bit MCU, 12KB Flash, 44-TQFP | Microchip
PIC18LF4439T-I/PT

PIC18LF4439T-I/PT - 8-bit MCU, 12KB Flash, 44-TQFP | Microchip

The Microchip Technology PIC18LF4439T-I/PT is an 8-bit PIC microcontroller featuring 12KB of Flash program memory, 640 bytes of RAM, and 32 digital I/O pins, packaged in a 44-lead TQFP (Tape and Reel, Industrial temperature grade). It belongs to the PIC18F family of enhanced Flash microcontrollers and operates from a low-voltage supply range suitable for battery-powered and portable designs. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, Flash program memory, peripherals, and I/O onto one die. The PIC18F architecture (Harvard, RISC) executes one instruction per clock cycle (except branches) and is widely used for embedded control in industrial, consumer, and automotive applications. Within Microchip's hierarchy, the PIC18F family sits between baseline PIC10/12/16 parts and the 16-bit dsPIC/PIC24 families. Key features of the PIC18LF4439T-I/PT include enhanced Flash memory supporting self-programmability, an industrial operating temperature range of -40C to +85C, and a 44-pin TQFP surface-mount footprint. The part suffix -LF denotes the low-voltage (LF) process variant optimized for operation at reduced VDD, while the T indicates Tape and Reel packaging and I denotes the industrial temperature grade. Typical applications include motor control (the PIC18F4439 family integrates dedicated motor-control peripherals such as PWM and quadrature encoder interfaces), sensor interfacing, low-power industrial controllers, and consumer appliance control. The combination of 12KB Flash, 640 bytes RAM, and 32 I/O is well-suited to small control loops where deterministic timing and modest code size matter more than raw CPU throughput. When designing with this part, verify the supply voltage range against your application: the LF process variant typically operates down to ~2.0 V, while the standard F variant operates 4.2-5.5 V. Engineers should consult the PIC18F4331/4431 datasheet family, which shares the same peripheral set, for detailed electrical characteristics and timer configuration. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers and procurement teams select and source the PIC18LF4439T-I/PT with full context.

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PIC18LF4450-I/ML - 48MHz 8-bit USB MCU, 16KB Flash, 44-QFN | Microchip
PIC18LF4450-I/ML

PIC18LF4450-I/ML - 48MHz 8-bit USB MCU, 16KB Flash, 44-QFN | Microchip

The Microchip PIC18LF4450-I/ML is an 8-bit PIC18 microcontroller with integrated Full-Speed USB 2.0 (12 Mbit/s), 16 KB (8K x 16) of Flash program memory and 768 bytes of SRAM, housed in a 44-pin QFN (8x8 mm) package with exposed thermal pad. It operates from a wide 2.0 V to 5.5 V supply range, runs at up to 48 MHz (12 MIPS) and is rated for the industrial -40C to +85C temperature window. The LF suffix denotes the low-voltage / low-power variant of the PIC18F4450 family. An 8-bit microcontroller (MCU) is a self-contained compute subsystem on a single silicon die, integrating a CPU core, non-volatile program memory (Flash), volatile data memory (SRAM), digital peripherals (timers, UART, I2C, SPI, USB) and general-purpose I/O. The PIC18 family is the high-performance tier of Microchip's 8-bit MCU line, sitting above PIC10/12/16 in peripheral richness and instruction throughput. The LF sub-family trades absolute speed headroom for wider operating-voltage range and nanoWatt sleep modes, making it a fit for battery- and bus-powered edge devices. Key features include 10-bit ADC with up to 13 input channels, three counter/timers, a Capture/Compare/PWM module, an Enhanced USART (EUSART, LIN-capable), Master I2C and SPI (up to 10 Mbit/s), the Full-Speed USB 2.0 transceiver with on-chip SIE, and Microchip's nanoWatt power-management block with Idle, Sleep and deep-sleep modes. The 44-QFN (ML) package exposes 34 general-purpose I/O lines plus dedicated USB D+/D- pads, VUSB and the internal 3.3V USB regulator. Architecturally the PIC18LF4450 implements an enhanced Harvard RISC core with 16-bit instructions, a hardware multiplier (8x8 single-cycle) and a 31-level deep stack. The integrated USB SIE handles packet framing, CRC and the physical-layer signaling so the CPU is freed from bit-banging, dramatically lowering firmware complexity for HID, CDC and vendor-class USB applications. Typical applications include USB HID peripherals (keyboards, mice, custom joysticks), USB-to-UART bridges, low-power sensor nodes with USB charging, industrial data loggers, LIN slave nodes in automotive body controllers, and educational/development boards. The wide 2.0-5.5 V range lets the device run directly from a single Li-ion cell, two AA cells, or a 3.3 V regulated rail. When designing with this part, observe the PCB layout rules in Microchip AN233 (USB PCB layout) - the D+/D- traces must be 90 ohm differential, matched-length, and the VUSB decoupling capacitor must be within 5 mm of the VUSB pin. For self-powered designs, the internal 3.3 V USB regulator can be disabled via CONFIG and an external rail supplied to the VUSB pin. This page synthesizes current distributor pricing, drop-in same-package alternatives, and practical layout notes that go beyond the datasheet to speed USB-MCU bring-up.

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PIC18LF4450T-I/ML - 16KB Flash USB MCU 48MHz QFN-44 | Microchip
PIC18LF4450T-I/ML

PIC18LF4450T-I/ML - 16KB Flash USB MCU 48MHz QFN-44 | Microchip

The Microchip Technology PIC18LF4450T-I/ML is an 8-bit RISC microcontroller featuring 16KB of enhanced Flash program memory, 768 bytes of RAM, and an integrated Full-Speed USB 2.0 transceiver, housed in a 44-pin QFN package (8x8 mm) with exposed thermal pad. It delivers 12 MIPS performance at 48 MHz clock speed and operates from 2.0V to 5.5V supply. A USB microcontroller is a specialized MCU that integrates a USB transceiver and serial interface engine (SIE) directly on-chip, eliminating the need for an external USB PHY. It belongs to the broader category of embedded controllers within the microcontroller -> 8-bit MCU -> PIC18 family -> USB-capable MCU hierarchy. The 'LF' prefix denotes a low-voltage variant optimized for battery-powered and low-power applications using Microchip's nanoWatt technology, while the 'F' architecture provides enhanced Flash with self-programming capability. Key features include 34 digital I/O pins, 13-channel 10-bit ADC, two analog comparators, two CCP modules, one enhanced USART, MSSP (SPI/I2C), and hardware multiply. The device supports ICSP (In-Circuit Serial Programming) and ICD (In-Circuit Debugger) for development workflows. nanoWatt power management provides multiple idle and sleep modes with current consumption under 1 microamp in sleep, suitable for USB bus-powered and battery applications. The integrated USB 2.0 Full-Speed transceiver supports low-speed (1.5 Mbps) and full-speed (12 Mbps) operation with on-chip SIE handling protocol, leaving the CPU free for application code. Typical applications include USB peripherals (HID-class devices, CDC virtual COM ports, mass storage), industrial control interfaces with USB diagnostics ports, USB-to-UART bridges, embedded data loggers with USB download, and battery-powered handheld instruments. The wide 2.0-5.5V supply range also supports both 3.3V and 5V system designs without level translation. When designing with this device, ensure the USB D+/D- traces are routed as a 90-ohm differential pair with characteristic impedance controlled to USB 2.0 specification. The internal 3.3V USB voltage regulator requires adequate decoupling (220 nF plus 100 uF bulk) per the datasheet reference design. The exposed thermal pad (EP) must be soldered to a ground plane for electrical and thermal performance. This page synthesizes distributor pricing, drop-in alternatives from the Microchip PIC18 family, and practical design notes not found in the manufacturer datasheet alone.

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PIC18LF4450T-I/PT - 8-Bit 48MHz USB MCU, 16KB Flash, TQFP-44 | Microchip
PIC18LF4450T-I/PT

PIC18LF4450T-I/PT - 8-Bit 48MHz USB MCU, 16KB Flash, TQFP-44 | Microchip

The Microchip Technology PIC18LF4450T-I/PT is an 8-bit RISC PIC18F-family microcontroller integrating a Full-Speed USB 2.0 transceiver, 16KB of enhanced Flash program memory (organized as 8K × 16), and 768 bytes of RAM, all housed in a 44-pin TQFP (10 × 10 mm) package. It executes instructions at up to 48 MHz (12 MIPS) and operates from a 2.0 V to 5.5 V supply, making it compatible with both 3.3 V and 5 V rails common in mixed-signal designs. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data-path CPU, on-chip program memory (ROM/Flash), data RAM, and a mix of peripherals such as timers, ADC, communication interfaces, and I/O pins. Within the broader taxonomy, the PIC18LF4450 belongs to the PIC18F high-performance flash family, which sits between baseline PIC10/12/16 parts and 16-bit PIC24/dsPIC devices, and is part of Microchip's microcontroller -> MCU -> embedded controller -> semiconductor hierarchy. The 'LF' prefix designates the low-voltage / low-power variant of the PIC18F4550. Key features include 34 digital I/O pins, integrated Full-Speed USB 2.0 device/host/OTG transceiver with on-chip voltage regulator, 10-bit ADC, Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART), Master Synchronous Serial Port (MSSP) for SPI and I2C, and nanoWatt Technology power management with multiple idle/sleep modes. The Enhanced Flash offers 100K erase/write cycle endurance typical and program retention exceeding 40 years. Architecturally, the PIC18LF4450 uses a 16-bit instruction word (8K × 16 = 16KB) with an 8-bit data path, Harvard architecture, and a hardware multiply unit. The integrated USB SIE handles low-level protocol, freeing the core from bit-banging and enabling CDC, HID, MSD and custom class firmware. The on-chip 3.3 V regulator provides up to 250 mA to external logic when the device is powered from 5 V. Typical applications include USB peripherals (HID mice/keyboards, CDC serial bridges, MSD card readers), industrial control with USB diagnostics, embedded data loggers, and battery-powered sensor nodes. Designers value the part for collapsing a separate USB bridge chip and external LDO into a single MCU footprint. When designing in the PIC18LF4450, ensure the 48 MHz HS oscillator uses the correct crystal and load capacitors, add a 1 µF bulk capacitor at VUSB and VDD, and reserve the D+/D- lines with 90-ohm differential routing. For low-power targets, leverage nanoWatt sleep modes and the on-board low-power Timer1 oscillator to reduce quiescent current below 1 µA. This page synthesizes distributor pricing, parametric comparisons with PIC18F4550 and PIC18F46J50 drop-in alternatives, and practical design notes not collocated in the manufacturer datasheet.

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PIC18LF4455-I/ML - 8-bit 48MHz USB MCU 24KB Flash | Microchip
PIC18LF4455-I/ML

PIC18LF4455-I/ML - 8-bit 48MHz USB MCU 24KB Flash | Microchip

The Microchip Technology PIC18LF4455-I/ML is an 8-bit PIC18 microcontroller running at 48 MHz with 24 KB of Flash program memory (12K x 16 words), 2 KB of RAM, and an integrated Full-Speed USB 2.0 transceiver, packaged in a 44-pin QFN (8x8 mm). It belongs to the PIC18F4550-family LF (low-voltage, 2.0V to 5.5V) variants with 12 MIPS throughput, nanoWatt power management, and 34 digital I/O pins. An 8-bit microcontroller (MCU) is a programmable processor with an 8-bit data path and integrated peripherals, used as the decision-making brain in embedded systems. Within the broader hierarchy, this device sits in the microcontroller category of integrated circuits, evolving upward into the semiconductor and embedded computing domains. PIC18 MCUs use a RISC instruction set with hardware multiplier, distinguishing them from 8051 and AVR cores while sharing the same design philosophy of deterministic real-time control. Key features include 256 bytes of EEPROM, an integrated Full-Speed (12 Mbit/s) USB 2.0 SIE with on-chip transceiver, A/D converter, Capture/Compare/PWM modules, and nanoWatt Technology modes (Idle, Sleep, and Deep Sleep) for battery-powered designs. The 44-QFN package provides a compact footprint with an exposed thermal pad, enabling surface-mount assembly into USB peripheral designs that need a small board area. The architecture combines a 16-bit-wide instruction word with separate program and data buses (Harvard architecture), allowing simultaneous fetch and read cycles that double throughput compared with traditional von-Neumann 8-bit cores. The integrated USB SIE eliminates the need for an external transceiver, reducing both BOM cost and PCB area in HID, CDC, and custom-class USB devices. The LF voltage range (2.0V to 5.5V) makes the chip suitable for direct Li-ion / 3.3V regulation while preserving the USB transceiver's proper signalling levels. Typical applications include USB Human Interface Devices (HID keyboards, mice, game controllers), USB-to-UART bridges (CDC class), industrial data loggers with USB connectivity, low-power sensor hubs, and consumer USB peripherals such as MIDI adapters. The 2 KB RAM supports moderate USB class driver stacks, and 34 I/O pins allow direct connection to buttons, encoders, LEDs, and SPI or I2C peripherals without an external I/O expander. When designing with this part, ensure the VUSB 3.3V internal LDO has a sufficient decoupling capacitor on the dedicated pin, and route the D+/D- differential pair with 90-ohm controlled impedance. For low-power designs, leverage the nanoWatt Sleep states and wake-up sources to maximize battery life in USB-attached devices that draw suspend current. This page synthesizes distributor pricing, parametric alternatives, and USB design notes that complement the Microchip PIC18F4550 datasheet family reference manual.

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PIC18LF4455-I/P - 8-Bit 48MHz USB MCU 24KB Flash 40-PDIP | Microchip
PIC18LF4455-I/P

PIC18LF4455-I/P - 8-Bit 48MHz USB MCU 24KB Flash 40-PDIP | Microchip

The Microchip Technology PIC18LF4455-I/P is an 8-bit PIC18F-family microcontroller with integrated Full-Speed USB 2.0, 24 KB of Flash program memory and 2 KB of RAM, operating at up to 48 MHz across a 2.0 V to 5.5 V supply range, housed in a 40-pin PDIP (I/P) through-hole package. According to the PIC18F2455/2550/4455/4550 family datasheet, the LF suffix denotes the extended low-voltage variant, and the I/P suffix indicates the industrial operating temperature grade (-40C to +85C) in PDIP-40. An 8-bit microcontroller (MCU) is a programmable processor that executes instructions on 8-bit-wide data, typically chosen for cost-sensitive, low-power, and deterministic control tasks. The PIC18F family sits in Microchip's mid-range 8-bit portfolio, between the baseline PIC10/12/16 series and the 16-bit dsPIC/PIC24 line, and the PIC18LF4455 specifically targets USB-enabled embedded designs thanks to its on-chip Full-Speed USB 2.0 (12 Mbit/s) peripheral plus three serial ports (I2C, SPI up to 10 Mbit/s, and LIN-capable EUSART). Key features of the PIC18LF4455-I/P include nanoWatt power management with multiple idle/sleep modes, a 10-channel 10-bit ADC, two analog comparators, two 8-bit timers plus three 16-bit timers, a 9-channel Enhanced Capture/Compare/PWM module, and a universal serial bus with on-chip transceiver. The wide 2.0 V to 5.5 V supply range allows direct operation from a single Li-ion cell, two alkaline cells, or a regulated 5 V rail. The industrial -40C to +85C temperature grade suits outdoor, industrial, and automotive-cockpit applications that do not require full AEC-Q100 qualification. Architecture-wise, the device uses an enhanced Harvard architecture with a 16-bit instruction word, 8-bit data path, hardware multiply, and a 31-level hardware stack, yielding roughly 10 MIPS sustained throughput at 48 MHz. The integrated SIE (Serial Interface Engine) handles USB framing and endpoint management in hardware, leaving the CPU free for application logic - this is a significant system-bill-of-materials reduction versus external USB interface chips. Typical applications for this part include USB HID peripherals such as custom keyboards, mice, and game controllers, USB-to-UART bridges, low-speed data loggers with PC connectivity, embedded development platforms (it appears in many PICDEM FS USB boards), industrial sensor nodes communicating over USB, and learning/hobby projects that benefit from a through-hole 40-pin package for breadboarding. The PDIP form factor is especially useful for prototypes and educational designs where socketed parts are reused. When designing with this part, the engineer should note the difference between the LF (low-voltage, 2.0-5.5 V) and the F (4.2-5.5 V only) variants, and ensure the 48 MHz internal or crystal configuration matches the USB Full-Speed PLL requirement. For long-term production, consider the surface-mount PIC18LF4455-I/PT (TQFP-44) variant once the design stabilizes, since the PDIP package is generally priced higher and aimed at low-volume or development use. This page consolidates distributor pricing, verified drop-in alternatives in the same 40-PDIP package, and practical design notes that go beyond the manufacturer datasheet to help engineers sourcing and qualifying the part.

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PIC18LF4455T-I/ML - 48MHz USB MCU 24KB Flash | Microchip
PIC18LF4455T-I/ML

PIC18LF4455T-I/ML - 48MHz USB MCU 24KB Flash | Microchip

The Microchip Technology PIC18LF4455T-I/ML is an 8-bit PIC microcontroller from the PIC18F family featuring Full-Speed USB 2.0 (12 Mbit/s), 24 KB of Flash program memory, 2048 bytes of RAM, and a maximum CPU clock of 48 MHz, packaged in a 44-pin QFN (8x8 mm) with exposed thermal pad. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), volatile data memory (RAM), and a rich set of peripherals on a single silicon die. Within the broader taxonomy, the PIC18F family sits between Microchip's baseline PIC10/12/16 families and the higher-end PIC24/dsPIC families, targeting USB connectivity, mixed-signal embedded control, and human-interface designs. The 'LF' prefix denotes the wide-voltage F-variant core that operates across 2.0 V to 5.5 V, enabling direct Li-ion battery operation and supporting Microchip's nanoWatt power-saving modes. Key features include three serial communication ports (FS-USB 2.0 at 12 Mbit/s, I2C/SPI up to 10 Mbit/s, and an EUSART LIN-capable asynchronous port), 10-bit ADC with up to 13 channels, two capture/compare/PWM modules, and nanoWatt Technology for sleep currents down to nanoampere levels. The 44-pin QFN exposed pad provides a low thermal resistance path suitable for sustained full-speed USB operation without external heatsinking. The device uses Microchip's enhanced Harvard RISC architecture with a hardware multiplier and 16-bit instructions optimized for C-compiled code. The wide operating voltage window (2.0 V to 5.5 V) means the same firmware image can target both USB-powered 5 V designs and battery-powered 3.3 V or 2.5 V designs, reducing BOM variants. Typical applications include USB human-interface devices (HID) such as keyboards, mice, and game controllers; USB-to-UART bridges and CDC-class peripherals; embedded data loggers with USB mass storage; industrial sensor interfaces; and consumer electronics that require USB connectivity. The combination of FS-USB and nanoWatt low-power modes also makes the part suitable for USB-powered battery chargers. When designing with this part, ensure the exposed pad is soldered to a sufficiently large ground pour to maintain junction temperature within the -40 C to +85 C industrial range. The internal 48 MHz PLL drives the USB module; firmware must enable the PLL and wait for PLL lock before USB enumeration to avoid USB bus errors. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not available on the manufacturer datasheet, helping procurement and engineering teams evaluate the PIC18LF4455T-I/ML for new designs and re-spins.

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PIC18LF4455T-I/PT - 8-bit 48MHz USB MCU 24KB Flash | Microchip
PIC18LF4455T-I/PT

PIC18LF4455T-I/PT - 8-bit 48MHz USB MCU 24KB Flash | Microchip

The Microchip Technology PIC18LF4455T-I/PT is an 8-bit RISC microcontroller in the PIC18F USB family featuring a 48 MHz PIC18 CPU core, 24 KB (12K x 16) of program Flash, 2048 bytes of SRAM, and 256 bytes of Data EEPROM, housed in a 44-pin TQFP (10x10 mm) package. It integrates a Full-Speed USB 2.0 peripheral (12 Mbit/s), making it a member of the nanoWatt XLP low-power family that operates across 2.0 V to 5.5 V supply rails. A microcontroller (MCU) is a single-chip computer containing a CPU core, program and data memory, and programmable peripherals. The PIC18 family extends this with a 16-bit instruction word architecture optimised for deterministic, byte-oriented C code generation, sitting above baseline PIC10/PIC12/PIC16 parts in Microchip's taxonomy. The LF (Low-Voltage/Flexible) suffix denotes the extended 2.0-5.5 V supply range and ultra-low-power nanoWatt XLP technology, allowing battery-powered designs. Key features of the PIC18LF4455T-I/PT include 24 KB self-programmable Flash with 100K erase/write cycles, an internal 8 MHz / 32 kHz oscillator block with PLL for 48 MHz operation, an integrated 5-bit DAC and 13-channel 10-bit ADC, three serial ports (FS-USB 12 Mbit/s, I2C, SPI up to 10 Mbit/s), and an asynchronous LIN-capable EUSART. Industrial temperature grade (-40C to +85C) and 35 instructions in the instruction set provide ample code density. The device uses a Harvard RISC architecture with separate program and data buses, allowing instruction fetch and operand read in a single cycle. On-chip peripherals are mapped into the SFR space and include Comparators, PWM, Capture/Compare, and a CTMU for capacitive touch sensing. The integrated Full-Speed USB transceiver eliminates external PHY components for many HID/CDC designs. Typical applications include USB HID peripherals (keyboards, mice, custom input devices), industrial sensor interfaces with USB diagnostics, low-power data loggers, LIN/CAN gateway nodes, and battery-powered IoT edge devices. Industrial -40C to +85C rating and 2.0-5.5 V supply make it ideal for portable and USB-powered embedded designs. When designing with the PIC18LF4455T-I/PT, ensure that the USB D+/D- traces are routed as a 90-ohm differential pair and that VBUS sensing uses the internal 3.3V regulator output. The TQFP-44 footprint requires standard SMT reflow; no external programming voltage is needed for ICSP. This page synthesises distributor pricing, drop-in PIC18 family alternatives, and practical design notes that complement the manufacturer datasheet.

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PIC18LF4458-I/PT - 8-Bit 48MHz USB MCU, 24KB Flash | Microchip
PIC18LF4458-I/PT

PIC18LF4458-I/PT - 8-Bit 48MHz USB MCU, 24KB Flash | Microchip

The Microchip PIC18LF4458-I/PT is an 8-bit PIC18F-family microcontroller featuring a 48 MHz CPU clock, 24 KB (12K x 16) of Enhanced Flash program memory, 2 KB of SRAM and an integrated USB 2.0 Full-Speed peripheral, housed in a 44-pin TQFP (10x10 mm) package. It is part of Microchip's 24/40/44-pin high-performance, 12 MIPS, Enhanced Flash, USB MCU family with nanoWatt Technology. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (RAM), and a rich set of digital and analog peripherals (timers, ADC, communication ports, USB, etc.) on a single silicon die. The PIC18F family sits in Microchip's 8-bit PIC taxonomy above the baseline PIC10/12/16 families, offering higher performance (up to 12 MIPS at 48 MHz), larger memory and the Enhanced Flash architecture with self-programmability. The PIC18LF4458 is the low-voltage 'LF' variant, optimized for operation down to 2.0 V, which makes it suitable for battery-powered or regulated 3.3 V designs. Key specifications include a 2.0 V to 5.5 V supply range, 34 digital I/O lines, integrated USB 2.0 Full-Speed transceiver, 10-bit ADC, multiple timers, I2C, SPI, USART, and nanoWatt power-management modes that drop current consumption to microampere levels during idle and sleep states. The 'I' suffix denotes an industrial temperature range of -40C to +85C. The device uses Microchip's Enhanced Harvard RISC architecture with a 16-bit instruction word and 8-bit data path. The 12 MIPS (million instructions per second) throughput at 48 MHz is sufficient for real-time USB class firmware (CDC, HID, MSD), sensor processing, and human-interface control loops. The on-chip 24 KB Enhanced Flash supports self-programming under firmware control, enabling bootloader-based field updates. Typical applications include USB peripherals (HID keyboards, mice, gamepads, CDC serial adapters), industrial data-acquisition front-ends, home-automation controllers, smart sensors with USB diagnostics ports, and low-cost consumer electronics that need USB connectivity without a dedicated PHY IC. Designers value the LF variant when system rails are already 3.3 V and the USB bus is self- or bus-powered. When laying out the 44-pin TQFP, place the decoupling capacitors (100 nF plus 4.7 uF bulk) as close as possible to VDD/VSS pairs, route the D+/D- USB pair with 90 ohm differential impedance, and ensure the exposed pad (if present) is soldered to the ground plane for thermal and electrical performance. Always include a 0.1 uF cap on VUSB when the internal USB regulator is used. This page synthesizes distributor pricing, drop-in compatible alternatives, application notes and design considerations that go beyond what is printed on the Microchip datasheet, helping engineers select the right MCU quickly and avoid common layout pitfalls.

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PIC18LF4458T-I/ML - 48MHz 8-Bit USB MCU 24KB Flash 44-QFN | Microchip
PIC18LF4458T-I/ML

PIC18LF4458T-I/ML - 48MHz 8-Bit USB MCU 24KB Flash 44-QFN | Microchip

The Microchip Technology PIC18LF4458T-I/ML is an 8-bit PIC18F microcontroller featuring a 48 MHz (12 MIPS) enhanced Harvard core, 24 KB (12K x 16) of self-programmable Flash program memory, and 2 KB of SRAM, packaged in a 44-pin QFN (8x8 mm) with exposed thermal pad. The 'LF' prefix denotes the 2.0V-5.5V wide VDD range, while the 'T' suffix indicates Tape & Reel packaging and 'I' marks the industrial -40C to +85C operating temperature grade. A PIC18 microcontroller is an 8-bit reduced-instruction-set computing (RISC) engine using a modified Harvard architecture with separate program and data buses; the PIC18 family specifically adds 16-bit instructions, hardware multiply, and a C-optimized instruction set that bridges legacy 8-bit code with modern C compilers. Within Microchip's hierarchy, PIC18 sits between baseline PIC10/12/16 and the 16-bit dsPIC/PIC24 families, targeting mid-range embedded USB, sensing, and human-interface applications where deterministic real-time response and low cost matter more than raw MIPS. Key features of the PIC18LF4458T-I/ML include a full-speed USB 2.0 FS transceiver with on-chip 3.3V regulator and 1.5 kB of endpoint RAM; a 12-channel 10-bit ADC with auto-acquisition; two USARTs, one SPI, and one I2C (Master/Slave); a 16-bit timer/counter plus two 8-bit timers; a 9-channel 10-bit PWM module; nanoWatt power management with multiple idle/sleep modes; and 34 digital I/O pins tolerant of 5V logic on a VDD-Domain digital supply. Architecturally, the device integrates an internal 8 MHz oscillator with a 4x PLL (yielding the 48 MHz FOSC) and supports crystal, resonator, and external clock sources. The 24 KB Flash is partitioned for a 32 KB bootloader-compatible region, while the 2 KB SRAM supports USB endpoint buffer allocation. The exposed pad (EP) of the QFN-44 must be soldered to a sufficient ground copper pour to meet the 31 C/W theta-JC thermal envelope; otherwise the silicon will fold back oscillator activity when junction temperature exceeds 150C. Typical applications include USB Human Interface Devices (HID keyboards, mice, game controllers), CDC virtual COM ports, low-speed instrumentation bridges, industrial sensor nodes with USB firmware update, and legacy serial-port-to-USB migration designs. Industrial-grade temperature and wide VDD also suit process-control front ends and battery-backed accessories. Design tip: route the USB D+/D- pair as a 90-ohm differential, place the VBUS-sense resistor within 5 mm of the VBUS pin, and tie the exposed pad to a continuous GND pour. For EMI-sensitive links, the internal 3.3V USB regulator should be bypassed with 1 uF X7R plus 100 nF at the pin. This page consolidates distributor pricing, drop-in alternatives, and practical design guidance beyond what is found in the manufacturer datasheet alone.

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PIC18LF4458T-I/PT - 48MHz 8-bit USB MCU, 24KB Flash | Microchip
PIC18LF4458T-I/PT

PIC18LF4458T-I/PT - 48MHz 8-bit USB MCU, 24KB Flash | Microchip

The Microchip Technology PIC18LF4458T-I/PT is a low-voltage 8-bit PIC microcontroller from the PIC18F4553 family, featuring a 48 MHz CPU core, 24 KB of FLASH program memory (organized as 12K x 16), and 2 KB of SRAM, housed in a 44-pin TQFP (10x10 mm) package with tape-and-reel packaging. The device operates across a wide 2.0 V to 5.5 V supply range, making it well-suited for both battery-powered and 5 V regulated systems. An 8-bit microcontroller (MCU) is a programmable processor that executes instructions from internal program memory and interfaces with peripheral devices through digital and analog I/O. The PIC18 family is Microchip's high-performance 8-bit architecture, sitting under the broader taxonomy of microcontrollers -> embedded processors -> semiconductors. Within the PIC18 family, the 'F4458 variant integrates a full-speed USB 2.0 (low-speed/full-speed) transceiver, enabling direct USB device connectivity without an external PHY. Key features of the PIC18LF4458T-I/PT include 256 bytes of EEPROM data memory, a 10-bit Analog-to-Digital Converter (ADC) with up to 13 input channels, multiple Enhanced Capture/Compare/PWM (ECCP) modules, a Master Synchronous Serial Port (MSSP) supporting SPI and I2C, two Enhanced USART modules, an on-chip USB 2.0 full-speed transceiver, and a 10 MIPS instruction throughput at 48 MHz. The 'LF' prefix denotes the low-voltage 'F' core that runs from 2.0 V to 5.5 V, supporting both 3.3 V and 5 V rails. The 44-pin TQFP package offers a compact surface-mount footprint suitable for space-constrained designs, while the wide operating temperature range of -40 °C to +85 °C (industrial, I-grade) enables use in industrial, automotive (non-safety) and consumer applications. The part number suffix /PT identifies the TQFP package variant, and the 'T' before the temperature grade indicates tape-and-reel packaging. Typical applications include USB Human Interface Devices (HID) such as keyboards, mice and game controllers, USB-to-UART bridges, low-cost data loggers, industrial sensor interfaces, and educational/development boards. The integrated USB transceiver eliminates external PHY components, reducing BOM cost in USB peripherals. When designing with this device, ensure the 48 MHz clock source (either internal oscillator with PLL or external crystal) is stable before USB enumeration begins. Decouple VDD/VSS with at least 100 nF ceramic capacitors placed close to the pins, and follow Microchip application note AN956 for USB hardware design guidelines. This page synthesizes distributor pricing as of 2026-09-28, drop-in pin-compatible alternatives, comparison data, and practical design notes that are not collated in the manufacturer datasheet alone, giving engineers and buyers a single reference for sourcing and second-sourcing the PIC18LF4458T-I/PT.

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PIC18LF448-I/L - 8-bit 40MHz MCU 16KB Flash 44-PLCC | Microchip
PIC18LF448-I/L

PIC18LF448-I/L - 8-bit 40MHz MCU 16KB Flash 44-PLCC | Microchip

The Microchip Technology PIC18LF448-I/L is an 8-bit PIC18F-series microcontroller with an integrated CAN module, 40 MHz maximum CPU clock, 16 KB (8K x 16) of FLASH program memory, 768 bytes of SRAM and 256 bytes of EEPROM, packaged in a 44-pin PLCC (16.59 x 16.59 mm). The 'LF' suffix indicates an extended-voltage (2.0V to 5.5V) variant that supports low-voltage operation for portable and battery-backed designs, and the 'I' industrial temperature grade runs from -40C to +85C. A PIC microcontroller (Peripheral Interface Controller) is a Harvard-architecture RISC MCU family originally developed by Microchip. Within that taxonomy, the PIC18F line is the high-performance 8-bit tier (16-bit instruction word, 8-bit data path) that adds hardware multiply, C-compiler-friendly architecture, and on-chip peripherals such as CAN, USB, and ADC. The PIC18LF448 sits in the sub-family with on-board CAN 2.0B, making it a fit point between the basic PIC18F442 and the higher-pin PIC18F458. Key features include 34 digital I/O pins, an internal 10-bit ADC, two analog comparators, a CAN 2.0B controller, two USART modules, a Master SSP (SPI/I2C), three timers and a 10-bit PWM module with capture/compare. Brown-out Reset (BOR), Low-Voltage Detect (LVD), Power-On Reset (POR) and a Watchdog Timer (WDT) give the part fault-recovery capability suitable for industrial control loops and automotive body electronics. Architecturally, the PIC18LF448 uses a 16-bit instruction path with an 8-bit data bus, 32-level hardware stack, and 8 x 8 hardware multiplier, allowing efficient C code generation. The LF core runs at 10 MHz at 2.0V and 40 MHz at 5V, and the in-circuit serial programming (ICSP) interface permits field firmware updates through just two pins. Typical applications include CAN-node automotive body modules, HVAC fan controllers, industrial sensor hubs, small motor-control boards and low-power instrumentation nodes. The combination of on-chip CAN, EEPROM and PLCC through-hole package makes the part a long-life-cycle fit for industrial backplanes. When designing, ensure the CAN bus uses proper 120-ohm termination at each end, place a 100 nF decoupling cap close to each VDD/VSS pair, and keep oscillator traces short. The LF silicon tolerates 2.0V to 5.5V, so a single LDO can power both MCU and 5V sensors. This page combines distributor pricing, drop-in alternative cross-references, and PCB design guidance not bundled in the datasheet PDF.

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PIC18LF448-I/P - 8-bit 40MHz 16KB Flash CAN MCU | Microchip
PIC18LF448-I/P

PIC18LF448-I/P - 8-bit 40MHz 16KB Flash CAN MCU | Microchip

The Microchip Technology PIC18LF448-I/P is an 8-bit PIC18 microcontroller with integrated CAN (Controller Area Network) peripheral, 16KB of Flash program memory, 768 bytes of SRAM, and a 40MHz maximum operating frequency, housed in a 40-pin PDIP (Plastic Dual In-line Package). It is part of the PIC18F family of low-power, high-performance microcontrollers designed for embedded control and industrial networking. An 8-bit microcontroller (MCU) is a compact, single-chip computer that integrates a CPU, RAM, Flash program memory, and a set of peripherals such as timers, ADC, communication interfaces, and I/O pins. The PIC18F family sits within Microchip's PIC taxonomy as a mid-range 8-bit architecture offering enhanced instruction set, C-friendly compiler support, and rich peripherals for control applications. The 'LF' prefix indicates a wide-voltage, low-power variant optimized for battery-operated designs, while the 'I' suffix denotes the industrial temperature range (-40C to +85C). Key features include 16KB (8K x 16) of self-programmable Flash, 768 bytes of data RAM, 256 bytes of EEPROM, 34 digital I/O pins, a 10-bit ADC with up to 11 channels, a CAN 2.0B controller, USART, MSSP (SPI/I2C), two analog comparators, and two capture/compare/PWM modules. The wide operating voltage range of 2.0V to 5.5V makes the LF variant particularly well-suited to battery-powered and energy-harvesting systems where standard F parts (4.2V-5.5V) would be unsuitable. The PIC18F448 architecture uses a 16-bit instruction word with an 8-bit data path, enabling efficient C compilation while retaining deterministic interrupt response. The integrated ECAN module supports CAN 2.0A and 2.0B active, with hardware acceptance filters and masking that offload message filtering from the CPU. Combined with nanoWatt power-management modes (idle, sleep, and run with peripheral clock gating), the part is engineered for industrial nodes that spend most of their time listening on the bus and only wake on CAN interrupts. Typical applications include industrial CAN node endpoints (sensor/actuator nodes on CANopen or DeviceNet networks), automotive body and chassis ECUs (interior lighting, HVAC controllers, seat modules), building automation HVAC controllers, and battery-backed sensor hubs. The integrated CAN peripheral eliminates the need for an external standalone CAN controller, reducing BOM cost and PCB area in networked embedded designs. When designing with this device, pay attention to the dedicated CAN pins (CANTX/CANRX) - they are remapped from standard I/O and require careful PCB routing to maintain bus signal integrity. Use a 5V-tolerant CAN transceiver such as the MCP2551 or TJA1050 between the MCU and the physical CAN bus, and place 120-ohm termination resistors at each end of the bus segment. This page synthesizes distributor pricing from DigiKey, Mouser and LCSC, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.

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PIC18LF448-I/PT - 8-Bit 40MHz 16KB Flash MCU w/ CAN | Microchip
PIC18LF448-I/PT

PIC18LF448-I/PT - 8-Bit 40MHz 16KB Flash MCU w/ CAN | Microchip

The Microchip Technology PIC18LF448-I/PT is an 8-bit PIC18 microcontroller IC featuring 16KB (8K x 16) of on-chip Flash program memory, 768 bytes of SRAM, and an integrated CAN (Controller Area Network) peripheral, housed in a 44-pin TQFP (10x10 mm) package. Operating at up to 40 MHz, the PIC18LF448-I/PT is part of Microchip's PIC18F family, offering enhanced mid-range performance with 16-bit instructions, hardware multiplier, and 10-bit ADC. This device belongs to the broader microcontroller (MCU) category - a programmable semiconductor that combines CPU core, memory, and peripherals in a single IC. Within that hierarchy, it sits at: MCU -> 8-bit MCU -> PIC18 family -> PIC18F sub-family -> PIC18LF448 variant. The PIC18LF448 specifically integrates a CAN 2.0B controller, distinguishing it from the PIC18F448 variant mainly through the LF (low-power) voltage operating range that supports 2.0V-5.5V operation. Key features include 34 I/O pins, hardware CAN 2.0B module, USART, MSSP (SPI/I2C), 10-bit ADC with up to 8 channels, nanoWatt power management for low-power operation, ICD (In-Circuit Debug) support, and 100K erase/write cycle Flash endurance. The 'LF' suffix indicates the low-voltage core supporting operation down to 2.0V, ideal for battery-powered and energy-conscious designs. Typical applications include industrial CAN bus nodes, automotive body electronics, sensor interfaces, building automation, HVAC controls, and embedded control systems requiring networked communication. The integrated CAN peripheral eliminates the need for an external CAN transceiver MCU-side controller, reducing BOM cost and PCB area. When designing with this MCU, pay attention to the CAN bus termination (typically 120 ohm at each end of the bus) and ensure the external CAN transceiver (e.g., MCP2551 or MCP2561) is properly matched. The 40 MHz maximum oscillator frequency requires careful PCB layout for crystal placement to minimize EMI.

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PIC18LF4480-I/ML - 8-bit MCU 16KB Flash ECAN 44-QFN | Microchip
PIC18LF4480-I/ML

PIC18LF4480-I/ML - 8-bit MCU 16KB Flash ECAN 44-QFN | Microchip

The Microchip Technology PIC18LF4480-I/ML is an 8-bit PIC18 RISC microcontroller featuring 16 KB of program Flash, 768 bytes of RAM, and 36 digital I/O pins, housed in a 44-pin QFN (ML) package. It operates from a 2.5V/3.3V/5V supply and includes an integrated Enhanced CAN (ECAN) controller, a 10-bit ADC, nanoWatt power management, and a 16-bit timer architecture. The 'LF' suffix indicates the low-voltage / wide-Vdd part that supports operation down to 2.0V. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, program and data memory, digital I/O, and a set of on-chip peripherals such as timers, ADC, and communication controllers. Within the PIC taxonomy it sits as PIC18 -> 8-bit MCU -> microcontroller -> embedded IC -> semiconductor. The PIC18LF4480 belongs to the PIC18F4480 family, which was designed to bring cost-effective ECAN connectivity to industrial and automotive CAN nodes while keeping the developer-friendly PIC18 instruction set. Key features include 16 KB Flash program memory with self-programmability, 768 bytes SRAM, 256 bytes EEPROM, an Enhanced CAN module supporting CAN 2.0B, a 10-bit ADC with up to 11 channels, two Enhanced USART modules, one MSSP (SPI/I2C) module, and nanoWatt power-saving modes that drop Iq to below 1 uA in sleep. The part supports an internal 8 MHz oscillator and an external clock up to 40 MHz, yielding 10 MIPS execution. Typical applications include CAN nodes on the CAN bus, automotive CAN nodes with body/comfort/chassis networking, industrial CAN nodes in PLCs, sensor and actuator networks using ECAN. The wide operating voltage and industrial temperature grade (-40C to +85C) also suit process-control and building-automation CAN nodes. When designing with this device, ensure your programmer/debugger supports the ICSP interface and that you budget for the 44-QFN thermal pad soldering to the PCB ground plane for proper heat sinking and electrical reference.

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PIC18LF4480-I/P - 8-Bit MCU, 16KB Flash, 48MHz, USB, 40-PDIP
PIC18LF4480-I/P

PIC18LF4480-I/P - 8-Bit MCU, 16KB Flash, 48MHz, USB, 40-PDIP

The Microchip PIC18LF4480-I/P is a low-voltage 8-bit Flash microcontroller from the PIC18 family with a 48 MHz maximum operating frequency, 16 KB of enhanced Flash program memory, 768 bytes of RAM, and 256 bytes of data EEPROM, housed in a 40-pin PDIP (P) package. The LF variant operates across a 2.0 V to 5.5 V supply range, making it suited to battery-powered and 3.3 V mixed-signal designs. An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, program memory, data memory, and configurable I/O peripherals onto a single die. The PIC18 family sits at the upper end of Microchip's 8-bit portfolio, supporting up to 10 MIPS performance, C-friendly instruction set, and rich peripheral integration. Microcontrollers belong to the broader category of microprocessors and embedded controllers within the semiconductor hierarchy. The 'LF' designation in the part number specifically denotes the low-voltage process node that extends operation down to 2.0 V, enabling direct connection to single-cell Li-ion or 2xAA battery stacks. Key features include a 10-channel 10-bit ADC, full-speed USB 2.0 Full-Speed (12 Mbps) peripheral, two analog comparators, two 8-bit and three 16-bit timers, two USART modules, one SPI, one I2C (Master/Slave), a 13-bit timer counter and nanoWatt power management. The LF4480 also integrates a CAN module and a 9th-bit enhanced USART for industrial and automotive networking. The instruction set is fully backward-compatible with the PIC16 family and supports linear memory addressing for C compilers. Internally, the PIC18LF4480 uses a RISC Harvard architecture with separate program and data buses, a hardware multiplier/divider for single-cycle 8x8 multiplication and 16/16 division, and the Flash program memory is rated for 100K erase/write cycles with 40-year retention, all per the manufacturer datasheet. The nanoWatt feature set includes multiple idle, sleep and run modes with on-the-fly clock switching. Typical applications include USB peripherals for PC interfaces, industrial CAN-bus sensor nodes, automotive body controllers, low-cost data loggers, and battery-powered instrumentation. When selecting a drop-in alternative, ensure the replacement retains USB, CAN, and 40-pin PDIP pinout or redesigns the PCB accordingly.

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PIC18LF4480-I/PT - 8-Bit 40MHz MCU 16KB Flash 44-TQFP | Microchip
PIC18LF4480-I/PT

PIC18LF4480-I/PT - 8-Bit 40MHz MCU 16KB Flash 44-TQFP | Microchip

The Microchip PIC18LF4480-I/PT is an 8-bit RISC microcontroller from the PIC18F family with integrated ECAN technology, 16 KB of Flash program memory, 768 bytes of RAM, and 256 bytes of EEPROM, housed in a 44-pin TQFP (10x10 mm) package. The LF suffix designates the low-voltage variant that operates from 2.0V to 3.6V, while the standard PIC18F4480-I/PT runs from 4.2V to 5.5V. The part executes instructions at up to 40 MHz (10 MIPS) from its enhanced Harvard architecture with 16-bit opcodes and 8-bit data path. A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), data memory (RAM), peripherals, and I/O on one die. Within the broader taxonomy, MCUs belong to microcontrollers -> embedded processors -> semiconductors. The PIC18 family is Microchip's mid-range 8-bit line, sitting between the baseline PIC10/12/16 and the 16-bit dsPIC/PIC24 families, and is widely used in industrial control, automotive CAN networks, and consumer devices. Key features of the PIC18LF4480-I/PT include an integrated ECAN module (CAN 2.0B active/被动 with hardware filtering), 36 digital I/O pins, a 10-bit ADC with up to 11 channels, multiple capture/compare/PWM (CCP/ECCP) modules, a USART with LIN support, MSSP for SPI/I2C, and nanoWatt Technology for ultra-low-power sleep modes. The 44-pin TQFP package offers 1 mm pitch and supports surface-mount assembly with moderate thermal performance. The device includes an internal 8 MHz oscillator and supports external crystals up to 40 MHz. Architecture details: The PIC18LF4480 uses an 8-bit data path with 16-bit instructions, eight-level hardware stack, and hardware multiply. The ECAN peripheral offloads CAN frame handling from the CPU, making it suitable for real-time automotive and industrial networks. The 10-bit ADC provides up to 11 input channels with selectable acquisition time and can be triggered by CCP events for synchronous sampling. nanoWatt Technology provides multiple idle and sleep modes (Idle, Sleep, Deep Sleep) reducing quiescent current to sub-microampere levels, enabling battery-powered applications. Typical applications include CAN-based sensor networks in vehicles (body controllers, instrument clusters, seat modules), industrial CANopen and DeviceNet nodes, HVAC controllers, building automation, sensor hubs for distributed I/O, and LIN master/slave nodes in automotive subnets. The integrated ECAN makes this part especially attractive for any application requiring robust differential bus communication with hardware-accelerated filtering. Design consideration: For reliable ECAN operation at 1 Mbps, ensure the bus termination (typically 120 ohm at each end), short stub lengths, and proper CAN transceiver selection (e.g., MCP2551 or MCP2562). The 44-pin TQFP offers more I/O than 28-pin or 40-pin variants but requires a 4-layer PCB for clean decoupling; place a 100 nF ceramic decoupling cap within 3 mm of each VDD/VSS pair.

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PIC18LF4480T-I/ML - 16KB Flash, 40MHz, ECAN 8-bit MCU | Microchip
PIC18LF4480T-I/ML

PIC18LF4480T-I/ML - 16KB Flash, 40MHz, ECAN 8-bit MCU | Microchip

The Microchip Technology PIC18LF4480T-I/ML is a 44-pin QFN-packaged 8-bit RISC microcontroller featuring 16 KB of Flash program memory, 768 bytes of SRAM, and 256 bytes of EEPROM, with an integrated ECAN (Enhanced Controller Area Network) module. It operates from 2.0 V to 5.5 V, supports speeds up to 40 MHz (10 MIPS), provides 36 digital I/O lines, and includes a 10-bit A/D converter with up to 13 input channels. The 'LF' suffix designates the low-voltage Flash variant optimized for lower power consumption, while the 'T' suffix indicates Tape and Reel packaging and 'I/ML' denotes the industrial temperature grade (-40 C to +85 C) in a 44-lead QFN package with an exposed thermal pad for improved thermal performance. A microcontroller (MCU) is a single-chip computer that contains a processor core, volatile and non-volatile memory, programmable I/O peripherals, and often analog or communication blocks, all on one IC. The PIC18 family is part of Microchip's 8-bit RISC architecture portfolio, sitting between lower-end PIC16 devices and the 16-bit PIC24/dsPIC families. PIC18 MCUs use a Harvard architecture with separate program and data buses, an accumulator-based register file (with linear access on the F4480), and a 16-bit instruction word, giving them a balance of deterministic timing, low power, and rich peripheral integration suitable for industrial, automotive, and consumer control applications. Key features of the PIC18LF4480T-I/ML include nanoWatt Technology for power-managed operation with multiple idle and sleep modes, an Enhanced CAN 2.0B module with hardware acceptance filters for automotive and industrial networking, an addressable USART module supporting both synchronous and asynchronous serial protocols, and a 10-bit A/D converter with up to 13 single-ended channels. The device also offers two analog comparators, two 8/16-bit timer/counters, a 4-word deep capture register, and a Parallel Slave Port for external bus connection, all configured through peripheral feature disable registers to save power when unused. Architecturally, the PIC18LF4480 uses an enhanced flash Harvard architecture that supports C-optimized instructions such as one-cycle multiply and hardware divide, with a 32-level hardware stack and an 8x8 hardware multiplier. The Flash program memory is rated for 100K erase/write cycles, supports self-programmability via ICSP, and can be optionally write-protected in blocks. The ECAN module implements CAN 2.0B active with full filtering, including DeviceNet addressing, while the Enhanced USART and MSSP (SPI/I2C) modules enable additional serial connectivity. Typical applications include automotive body and chassis ECAN nodes, industrial CAN-bus sensor and actuator modules, HVAC control boards, building automation gateways, and low-power battery-sensed instrumentation. In automotive body control, the integrated ECAN controller with hardware filtering dramatically reduces software overhead compared to bit-banged CAN, allowing nodes such as seat controllers, mirror modules, or HVAC flaps to participate on a multi-node bus at 125 kbps or 500 kbps. When designing with this part, place decoupling capacitors (100 nF ceramic plus a bulk 1 uF to 10 uF) as close as possible to VDD/AVDD/VSS/AVSS pins and ensure the QFN thermal pad is soldered to a continuous copper plane to keep the silicon die within its industrial temperature rating under continuous ECAN activity. NanoWatt modes such as Sleep can drop current into the low microamp range, but wake-up latency and ECAN state retention must be verified for your specific timing budget.

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PIC18LF4480T-I/PT - 8-Bit 40MHz 16KB Flash MCU | Microchip
PIC18LF4480T-I/PT

PIC18LF4480T-I/PT - 8-Bit 40MHz 16KB Flash MCU | Microchip

The Microchip Technology PIC18LF4480T-I/PT is an 8-bit RISC PIC18 microcontroller running up to 40 MHz with 16 KB (8K x 16) of Enhanced Flash program memory, 768 bytes of RAM, and 256 bytes of EEPROM, housed in a 44-pin TQFP (10x10 mm) package on tape-and-reel. The 'LF' prefix denotes the low-voltage variant operating across 2.0 V to 5.5 V, and the 'T' suffix indicates tape-and-reel packaging. It integrates a 10-bit ADC, CAN 2.0B controller, USART, SPI, I²C, and up to 36 digital I/O pins, making it a single-chip solution for industrial control and automotive body networks. A PIC18 microcontroller is an 8-bit Harvard-architecture RISC device family from Microchip Technology, belonging to the broader microcontroller (MCU) class within power management and embedded processing semiconductor hierarchies. PIC18 devices use separate program and data buses for simultaneous instruction fetch and operand access, delivering deterministic throughput up to 10 MIPS at 40 MHz and offering Enhanced Flash with 100,000-cycle endurance plus self-programmability in-application. Key features of this part include 16 KB on-chip flash, 768-byte SRAM, 256-byte EEPROM, two 8-bit and three 16-bit timers, 10-bit A/D converter with up to 11 channels, ECAN module for CAN 2.0B active/passive, MSSP for SPI/I²C, and a USART with LIN support. The 44-pin TQFP (PT) package exposes up to 36 I/O pins, supports ICD (in-circuit debugging), and carries the industrial temperature grade -40 °C to +85 °C. The architecture employs a 16-bit instruction word with 8-bit data path, an 8-level deep hardware stack, and a priority level interrupt controller, enabling responsive event handling in real-time control loops. The LF silicon is optimized for low-voltage operation down to 2.0 V, suitable for battery-powered and 3.3 V designs without a 5 V boost stage. Typical applications include industrial automation (CAN node endpoints, sensor conditioning), automotive body electronics (LIN/CAN nodes, BCMs), appliance control, building automation, and embedded CAN bridges. Its wide voltage range also enables portable instrumentation and battery-monitoring subsystems. Designers should bias VDD with a 100 nF decoupling cap placed within 5 mm of the pin and route analog/digital grounds carefully when using ADC channels to avoid reference drift. For long CAN bus stubs, use 120 Ω termination at each end and keep stubs under 30 cm. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design considerations drawn from Microchip datasheets, helping engineers accelerate PIC18LF4480T-I/PT evaluation and BOM decisions.

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PIC18LF448T-I/PT - 8-bit 40MHz MCU 16KB Flash CAN 44-TQFP | Microchip
PIC18LF448T-I/PT

PIC18LF448T-I/PT - 8-bit 40MHz MCU 16KB Flash CAN 44-TQFP | Microchip

The Microchip Technology PIC18LF448T-I/PT is an 8-bit PIC18F-family RISC microcontroller with 16KB of Flash program memory, 768 bytes of SRAM, and an integrated CAN 2.0B controller, housed in a 44-pin TQFP (10x10 mm) package. It runs at up to 40MHz from a 2.0V-5.5V supply, provides 34 digital I/O lines, and includes a 10-bit ADC with 8 channels for mixed-signal embedded designs. The "/PT" suffix indicates the TQFP package while the "T" denotes tape-and-reel packaging, and "I" denotes the industrial -40C to +85C temperature grade. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data-path CPU, on-chip program memory (Flash/ROM), data memory (SRAM), and a rich set of peripherals (timers, ADC, communication interfaces, GPIO). PIC18F-series MCUs sit at the upper end of Microchip's 8-bit portfolio, offering an enhanced RISC instruction set, hardware multiplier, priority-interrupt controller, and up to 16 MIPS performance at 40MHz. This places the PIC18LF448T-I/PT within the broader hierarchy: microcontroller -> 8-bit MCU -> PIC18F family -> CAN-enabled automotive/industrial MCU -> embedded control semiconductor. Key features include 16KB (8K x 16) Flash program memory, 256 bytes of EEPROM data memory, an integrated ECAN module, master I2C, SPI, and an addressable USART. The 10-bit ADC provides 8 input channels with 100K samples-per-second conversion rate, while four timer modules (Timer0/1/2/3) support capture, compare, and PWM operation. The NanoWatt power-management technology provides multiple idle and sleep modes that draw microampere-level currents for battery-backed and energy-harvesting designs. Architecturally, the PIC18LF448T-I/PT uses a 16-bit-wide instruction word with an 8-bit data path, a hardware multiply unit, and a vectored interrupt controller. The Harvard architecture separates program and data buses, allowing simultaneous fetch and read/write. The integrated CAN module implements the CAN 2.0B active specification with three transmit and two receive buffers plus maskable filters - a feature uncommon in 8-bit MCUs and the primary reason this family was specified into automotive body, industrial sensor, and building-automation networks. Typical applications include CAN node endpoints in automotive body and chassis networks, industrial sensor hubs, building-automation gateways, HVAC control boards, and low-cost motor-control subsystems. The wide 2.0V-5.5V operating range and integrated 5V-tolerant digital inputs make the part compatible with both 3.3V and 5V system rails without external level shifters. When designing with this device, allocate the 44-pin TQFP land pattern carefully: the pinout exposes VDD/VSS pairs at multiple positions that must each be decoupled with a 100nF ceramic cap placed within 3mm of the respective pin. For CAN bus designs, a 120 ohm termination resistor and a CAN transceiver such as the MCP2551 or TJA1050 are mandatory between the MCU's CANRX/CANTX pins and the bus. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet - information the Microchip datasheet alone does not provide for procurement and second-source decisions.

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PIC18LF44J10-I/ML - 8-bit PIC MCU, 16KB Flash, 40MHz | Microchip
PIC18LF44J10-I/ML

PIC18LF44J10-I/ML - 8-bit PIC MCU, 16KB Flash, 40MHz | Microchip

The Microchip Technology PIC18LF44J10-I/ML is a 8-bit RISC microcontroller from the PIC18 J-series family, delivering 16 KB of Flash program memory, 1024 bytes of SRAM, and 40 MHz maximum CPU clock speed in a 44-pin QFN (8x8 mm) package. Operating from 2.0 V to 3.6 V (LF low-voltage variant), this industrial-temperature (-40C to +85C) MCU integrates an enhanced USART, two MSSP (SPI/I2C) peripherals, a 10-bit ADC with up to 13 input channels, and four 16-bit timers/ counters. What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (SRAM), and a rich set of peripherals (ADC, timers, communication interfaces, GPIO) on a single die. MCUs sit at the bottom of the embedded computing hierarchy alongside discrete logic and digital signal controllers, and above general-purpose microprocessors in terms of integration for embedded/IoT, industrial, consumer, and automotive-body applications. The PIC18 family uses an enhanced Harvard RISC architecture with 16-bit opcodes and 8-bit data path, optimized for deterministic interrupt response and C-compiler efficiency. The PIC18LF44J10-I/ML features the J-series peripheral set: enhanced addressable USART with LIN support, two synchronous serial ports with I2C address masking, a 10-channel 10-bit ADC, four timer modules, two capture/compare/PWM modules, and a Parallel Slave Port on larger pin-count variants. The 8x8 mm QFN-44 package (industrial designator ML) provides a low-profile 0.9 mm height and thermal pad for improved dissipation. The J-series uses a single 3.3 V supply and internal switching regulator to provide the 2.5 V core voltage from VDD, which eliminates the need for external core voltage rails. This internal regulator architecture simplifies PCB layout for mixed-signal designs where the MCU coexists with 3.3 V analog and digital circuitry. The LF prefix designates the industrial-temperature variant supporting operation from -40C to +85C. Typical applications include industrial sensor interfaces, USB-to-UART bridges (with USB transceiver), LIN nodes in automotive body electronics, low-power remote control panels, white-goods user interfaces, and consumer-electronics control boards. The 16 KB Flash is well matched to state-machine plus communication-stack firmware, while 1024 bytes of RAM supports modest RTOS usage. When designing with this part, ensure the VDD/VSS pin-pair decoupling (100 nF ceramic within 3 mm of each supply pin) follows the J-series reference design, and that the internal regulator output capacitor (VCAP pin) uses a low-ESR 1 uF to 10 uF ceramic. Programming via ICSP requires the PGC/PGD pins to be accessible on production headers. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes that are not covered in the standalone datasheet, providing decision-ready information for engineers selecting 8-bit microcontrollers for cost-sensitive 3.3 V embedded designs.

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PIC18LF44J10-I/P - 8-Bit 40MHz PIC18 16KB Flash MCU | Microchip
PIC18LF44J10-I/P

PIC18LF44J10-I/P - 8-Bit 40MHz PIC18 16KB Flash MCU | Microchip

The Microchip Technology PIC18LF44J10-I/P is an 8-bit RISC PIC18J-family microcontroller with 16KB Flash program memory, 1024 bytes RAM, and a 40MHz (12 MIPS) CPU core, housed in a 40-pin PDIP (DIP-40) through-hole package. It supports 2V to 5.5V supply operation, integrates nanoWatt power-saving technology, and provides 34 digital I/O pins with up to 13 channels of 10-bit ADC. The Industrial (-I) temperature grade covers -40C to +85C operation for harsh environments. What is a PIC18 microcontroller? PIC18 is Microchip's high-performance 8-bit family built on a Harvard RISC architecture with modified 16-bit instruction words; it sits between the baseline PIC10/12/16 and the 16-bit dsPIC/PIC24 families, providing higher code density, C-compiler efficiency, and richer peripherals than legacy 8-bit parts while remaining lower-cost and lower-power than 16/32-bit alternatives. The 'LF' suffix denotes a wide-voltage, low-power variant compatible with battery and 3.3V designs. Key features include 16KB (8K x 16) self-programmable Flash, 1KB SRAM, 13-channel 10-bit A/D converter, two analog comparators, enhanced USART with LIN support, two I2C/SPI capable MSSP ports, two 8-bit and three 16-bit timers, and nanoWatt Technology with multiple idle/sleep modes that drop current to microampere levels. The 40-MHz oscillator drives 12 MIPS throughput, enabling real-time control loops previously requiring 16-bit cores. Typical applications include USB peripherals (HID class devices, CDC virtual COM ports), industrial sensor interfaces, low-power data loggers, LIN slave nodes in automotive body electronics, and battery-powered consumer appliances. The Industrial temperature range plus 2-5.5V supply flexibility also suits HVAC controllers, smart metering, and home automation gateways. Design consideration: Use Microchip's MPLAB X IDE with XC8 compiler and MPLAB ICD 3 or PICkit 3/4 for programming/debugging. Place a 100nF decoupling capacitor on each VDD/AVDD pair as close to the IC as possible and keep analog traces away from switching nodes to preserve ADC accuracy. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the manufacturer datasheet, helping engineers select and source the PIC18LF44J10-I/P efficiently.

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