PIC18LF27K42T-I/SS - 64MHz 8-bit XLP MCU, 128KB Flash | Microchip
N.º da peça: PIC18LF27K42T-I/SS ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.1 | $3,10 |
| 10 | $2.79 | $27,90 |
| 100 | $2.45 | $245,00 |
| 500 | $2.18 | $1.090,00 |
| 1.000 | $1.94 | $1.940,00 |
| 3.000 | $1.74 | $5.220,00 |
PIC18LF27K42T-I/SS Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), non-volatile EEPROM, and a set of on-chip peripherals such as ADC, timers, communication interfaces, and general-purpose I/O. The PIC18 family sits in Microchip's high-performance 8-bit tier, bridging simple PIC10/PIC12/PIC16 designs and the 16-bit dsPIC/PIC24 families. MCUs in this class are typically used to sense, control, and communicate in embedded products across consumer, industrial, and automotive markets.
Key features include 128 KB Flash (64K x 16 words), 8 KB SRAM, 1 KB EEPROM, a 12-bit ADC with computation (ADC2) and automated channels, a 5-bit DAC, configurable logic cells (CLC), multiple PWM modules, vector interrupts, DMA, and Core Independent Peripherals (CIP) that offload tasks from the CPU. The XLP architecture delivers nanoWatt sleep currents and a typical IDD of a few microamps in deep sleep, making the part suitable for battery-powered applications.
Architecturally, the PIC18LF27K42 uses a 16-bit instruction word with an 8-bit data path, 31-level hardware stack, and a 4x PLL-locked 16 MHz HFINTOSC that supports 64 MHz operation. On-chip peripherals are routed through the Peripheral Pin Select (PPS) system, allowing flexible remapping of digital functions to physical I/O pins without changing the firmware.
Typical applications include low-power IoT sensor nodes, battery-powered instrumentation, USB-to-UART bridges (using the PPS-mappable UART), home appliance control panels, lighting controllers, and small motor-control loops. Its 1 KB EEPROM and rich analog peripherals also make it useful for handheld medical consumables and factory sensor hubs.
When designing with this MCU, the LF (low-Voltage F) variant's 1.8 V minimum is mandatory for 2x AA battery stacks; switch to the standard PIC18F27K42 (2.7 V to 5.5 V) if your rail is regulated 5 V. Decoupling requires a 100 nF next to each VDD/VSS pair plus a bulk 10 uF; unused I/O must be configured as outputs low to avoid floating-pin current.
This page synthesizes distributor pricing for the PIC18LF27K42T-I/SS, drop-in alternatives in the same SSOP-28 footprint, and design notes derived from Microchip's XLP guidance not collated on any single distributor page.
Alternativas drop-in para PIC18LF27K42T-I/SS — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18LF27K42T-I/SS (mesmo formato e footprint) — diferindo em DAC, Package, ADC, Operating Temperature, Core Architecture.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18LF27K42-I/SS
✅ Drop-In✓ Em estoque
$1.85 / unidade
Ver ficha técnica →PIC18F27K42T-I/SS
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF26K42-I/SS
✅ Drop-In✓ Em estoque
$2.02 / unidade
Ver ficha técnica →PIC18F26K42T-I/SS
✅ Drop-In✓ Em estoque
$2.3 / unidade
Ver ficha técnica →PIC18LF27K40T-I/SO
✅ Drop-In✓ Em estoque
$2.07 / unidade
Ver ficha técnica →PIC18F46K42T-I/SS
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF27K42T-I/SS Classificações máximas e características elétricas
| Core Architecture | PIC18 (8-bit data, 16-bit instruction) |
| Program Memory (Flash) | 128 KB (64K x 16 words) |
| Data SRAM | 8 KB |
| EEPROM | 1 KB |
| Maximum CPU Clock | 64 MHz |
| MIPS (peak) | 16 MIPS (16 MHz) to 64 MIPS (64 MHz) |
| Operating Voltage (LF) | 1.8 V to 3.6 V |
| I/O Pins | 25 |
| ADC | 12-bit ADC2 with computation, multiple channels |
| DAC | 5-bit DAC |
| Comparators | On-chip comparators (CIP) |
| Timers | Multiple 8/16-bit timers with CCP/PWM |
| Communication | UART, SPI, I2C with PPS |
| DMA | Yes (Direct Memory Access) |
| Peripheral Pin Select (PPS) | Yes |
| CLC (Configurable Logic Cells) | Yes |
| Vectored Interrupts | Yes |
| Temperatura de operação | -40C to +85C (Industrial) |
| Encapsulamento | 28-pin SSOP (SS), Tape and Reel |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do PIC18LF27K42T-I/SS
| Pino 1 | MCLR/VPP — Master clear (reset) input or programming high voltage |
| Pino 2 | RA0 — Port A bit 0 (analog/digital I/O, CCP) |
| Pino 3 | RA1 — Port A bit 1 (analog/digital I/O, CCP) |
| Pino 4 | RA2 — Port A bit 2 (analog/digital I/O) |
| Pino 5 | RA3 — Port A bit 3 (analog/digital I/O, VREF+) |
| Pino 6 | RA4 — Port A bit 4 (analog/digital I/O) |
| Pino 7 | RA5 — Port A bit 5 (analog/digital I/O) |
| Pino 8 | VSS — Ground reference |
| Pino 9 | RA7 — Port A bit 7 (analog/digital I/O, OSC1) |
| Pino 10 | RA6 — Port A bit 6 (analog/digital I/O, OSC2) |
| Pino 11 | RC0 — Port C bit 0 (analog/digital I/O, PPS) |
| Pino 12 | RC1 — Port C bit 1 (analog/digital I/O, PPS) |
| Pino 13 | RC2 — Port C bit 2 (analog/digital I/O, PPS) |
| Pino 14 | RC3 — Port C bit 3 (analog/digital I/O, PPS) |
| Pino 15 | RC4 — Port C bit 4 (analog/digital I/O, PPS) |
| Pino 16 | RC5 — Port C bit 5 (analog/digital I/O, PPS) |
| Pino 17 | RC6 — Port C bit 6 (analog/digital I/O, PPS) |
| Pino 18 | RC7 — Port C bit 7 (analog/digital I/O, PPS) |
| Pino 19 | VSS — Ground reference |
| Pino 20 | VDD — Positive supply voltage |
| Pino 21 | RB0 — Port B bit 0 (analog/digital I/O, interrupt-on-change) |
| Pino 22 | RB1 — Port B bit 1 (analog/digital I/O, interrupt-on-change) |
| Pino 23 | RB2 — Port B bit 2 (analog/digital I/O, interrupt-on-change) |
| Pino 24 | RB3 — Port B bit 3 (analog/digital I/O, interrupt-on-change) |
| Pino 25 | RB4 — Port B bit 4 (analog/digital I/O, interrupt-on-change) |
| Pino 26 | RB5 — Port B bit 5 (analog/digital I/O, interrupt-on-change, CCP) |
| Pino 27 | RB6 — Port B bit 6 (analog/digital I/O, ICSP CLK) |
| Pino 28 | RB7 — Port B bit 7 (analog/digital I/O, ICSP DAT) |
Aplicações típicas
PIC18LF27K42T-I/SS é adequado para 7 aplicaçãos: Battery-Powered IoT Sensor Node, Home Appliance Control Panel, USB-to-UART Bridge / HID Device, Portable Medical Consumable Reader, LED Lighting Controller, Handheld Test and Measurement Instrument, Small Brushless DC Motor Controller.
Battery-Powered IoT Sensor Node
The PIC18LF27K42T-I/SS is purpose-built for battery-powered IoT sensor nodes thanks to its XLP sleep currents in the nanoamp range and 1.8 V to 3.6 V supply window that directly accepts 2x AA or single-cell LiFePO4 chemistries. Its 12-bit ADC2 with auto-scan and computation offloads sensor sampling from the CPU, while the 64 MHz core wakes just long enough to read sensors and push packets over a UART or SPI-connected radio. The 128 KB Flash holds substantial protocol stack plus application logic, and 1 KB EEPROM provides non-volatile calibration storage. The 8 KB SRAM accommodates TLS or MQTT-style buffering. Compared with discrete op-amp + ADC + MCU designs, the integrated peripherals reduce BOM cost and board area for compact wireless sensor products.
Recomendado
Home Appliance Control Panel
White-goods control panels benefit from the PIC18LF27K42T-I/SS's 25 GPIO pins driving multiplexed LED or LCD segment displays, push-buttons, and triac-fired load drivers. Peripheral Pin Select (PPS) lets designers route UART for diagnostics or I2C for an external keypad controller without re-spinning the PCB. The 12-bit ADC reads temperature and humidity sensors directly with on-chip computation for filter averaging. With its 64 MIPS throughput, the MCU can also perform BLDC or universal-motor control via PWM/CCP at a modest 25 kHz switching frequency. Industrial-grade -40C to +85C rating covers under-cabinet and garage-appliance environments.
Recomendado
USB-to-UART Bridge / HID Device
With 128 KB Flash, the PIC18LF27K42T-I/SS can host a USB device stack, CDC class bridge, or HID class firmware without resorting to an external bridge IC. The PPS system maps UART TX/RX to any RP pin, simplifying board layout, while the DMA controller moves data between USB endpoints and SRAM without CPU intervention. A 12 MHz external crystal times the USB full-speed signaling, and the internal PLL synthesizes the 48 MHz USB clock. Designers save roughly USD 1.20 per board compared with CP2102-style external bridges and gain flexibility to add custom vendor commands. The 1.8 V to 3.6 V supply window also allows direct tie-in to battery charger rails.
Recomendado
Portable Medical Consumable Reader
Single-use diagnostic consumables and handheld readers pair well with the PIC18LF27K42T-I/SS thanks to its precise 12-bit ADC2 with computation, low-power XLP sleep, and 1 KB EEPROM for lot calibration. The MCU can wake on a button-press interrupt, run a photodiode readout sequence through the on-chip op-amp + ADC, store the result, and return to nanoamp sleep within milliseconds. Its industrial temperature range and SSOP-28 small footprint suit disposable-cartridge form factors, while RoHS compliance aligns with medical-device environmental regulations. Compared with ASIC designs, the PIC18 LF variant offers reprogrammable flexibility for chemistry updates without mask changes.
Recomendado
LED Lighting Controller
Architectural and architectural-grade LED controllers rely on the PIC18LF27K42T-I/SS for its multiple PWM/CCP channels and CLC peripherals that build hardware-state machines for color-mixing without CPU intervention. The 12-bit ADC measures supply current and ambient light for closed-loop brightness and color-temperature control, while the UART or DALI link runs on PPS-remapped pins for fixture networking. Sleep currents in the nanoamp range mean standby power consumption for a fixture is dominated by the driver electronics, not the MCU. Compared with discrete 555-timer designs, this integrated approach shrinks BOM cost and gives designers software-driven dimming curves.
Recomendado
Handheld Test and Measurement Instrument
Handheld DMMs and process calibrators benefit from the PIC18LF27K42T-I/SS's 12-bit ADC2 with auto-channel scanning, multiple UART/SPI/I2C interfaces, and XLP sleep for long battery life in field service. The 128 KB Flash supports custom protocol stacks (Modbus, HART) and a graphic menu system on a small OLED or TFT display, while the 8 KB SRAM buffers measured datasets. The industrial -40C to +85C rating tolerates unconditioned service-truck environments, and the SSOP-28 footprint fits a compact handheld enclosure. Compared with older PIC18F46K22 designs, the LF27K42 adds DMA, CLC, and PPS, reducing external glue logic.
Recomendado
Small Brushless DC Motor Controller
Sensorless or hall-sensored BLDC motor controllers up to about 100 W fit comfortably on the PIC18LF27K42T-I/SS, leveraging its PWM/CCP modules, 12-bit ADC for back-EMF or current sensing, and CLC peripherals that build the commutation state machine in hardware. The 64 MIPS throughput supports field-oriented control (FOC) or trapezoidal commutation at 20-30 kHz loop rates. Peripheral Pin Select makes PCB layout of the three-phase gate-driver connections trivial. Compared with dedicated motor-control ICs, this approach gives designers a programmable C-language environment for tuning loops and protecting against fault conditions.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF27K42T-I/SS — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18LF27K42-I/SS | PIC18F27K42T-I/SS | PIC18LF26K42-I/SS | PIC18F26K42T-I/SS | PIC18LF27K40T-I/SO | PIC18F46K42T-I/SS |
|---|---|---|---|---|---|---|---|
| Package | SSOP-28 (SS) | SSOP-28 (SS) - same | SSOP-28 (SS) - same | SSOP-28 (SS) - same | SSOP-28 (SS) - same | SOIC-28 (SO) - larger footprint | SSOP-28 - same SSOP family, but pinout differs for higher pin-count variants |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.7 V to 5.5 V | 1.8 V to 3.6 V | 2.7 V to 5.5 V | 1.8 V to 3.6 V | 2.7 V to 5.5 V |
| Program Flash | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 64 KB (-50%) | 128 KB | 64 KB (-50%) |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Max Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| ADC Resolution | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 10-bit ADC (legacy) | 12-bit ADC2 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Approx. Qty-1 Price (USD) | 3.10 | 2.90 (typical) | 3.05 (typical) | 2.70 (typical) | 2.65 (typical) | 3.20 (typical) | 3.45 (typical) |
Principais diferenciais
- Highest memory density in the K42 SSOP-28 family (vs PIC18LF26K42-I/SS)
- Low-voltage LF supply supports battery-powered designs (vs PIC18F27K42T-I/SS)
- Next-generation K42 peripherals vs K40 legacy (vs PIC18LF27K40T-I/SO)
Notas de projeto
The PIC18LF27K42T-I/SS LF variant requires a 1.8 V to 3.6 V supply; apply VDD first and ensure bulk decoupling of 10 uF plus a 100 nF ceramic placed within 5 mm of the VDD/VSS pins. For 2x AA battery applications, verify VDD holds above 1.8 V under load transients - alkaline cells can dip below 1.8 V near end-of-life, causing brown-out resets. The MCU has a configurable BOR that should be enabled in firmware to put the part into a clean reset state if VDD droops below threshold. Estimated: at 25C ambient, the typical IDD in sleep mode is in the nanoamp range per the XLP family datasheets.
The SSOP-28 footprint requires a 0.65 mm pitch land pattern with 0.4 mm wide pads and 0.4 mm spacing; solder mask slivers between pads should be at least 0.1 mm to avoid reflow defects. Place a continuous ground plane on the second layer directly under the SSOP-28 device to reduce radiated emissions from the 64 MHz core clock and to provide thermal spreading. Keep the ICSP CLK/DAT pins (RB6/RB7) accessible for in-circuit programming - do not place these directly under tall connectors. The MCLR pull-up resistor (typically 10 kohm) should be tied to VDD, not a switched rail, to ensure proper reset on power-up.
Configuration bits must be programmed before the first code execution - leaving CONFIG unprogrammed can lock the part into a state where MCLR is disabled or the watchdog is always on. The PPS (Peripheral Pin Select) registers unlock sequence must be executed before remapping digital peripherals; if PPS is misused, peripherals will not appear on the expected pins. Unused I/O pins must be configured as outputs driving low or as inputs with the internal weak pull-up enabled; leaving them as analog inputs and floating can add microamp-level leakage currents that destroy the XLP nanoamp sleep budget. Finally, do not exceed 64 MHz FOSC when running at low VDD - the clock must be reduced when VDD drops below 2.7 V to maintain timing margins.
Informações de conformidade
RoHS and REACH compliant per Microchip product page. Lead-free (Pb-free) reflow profile per JEDEC J-STD-020. Not AEC-Q100 qualified - choose PIC18F27K42-E/SS extended-temperature variant or higher-grade part for automotive applications.
