PIC18LF27K42-I/SS - 128KB Flash XLP 8-bit MCU 28-SSOP
N.º da peça: PIC18LF27K42-I/SS ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.95 | $2,95 |
| 10 | $2.65 | $26,50 |
| 100 | $2.3 | $230,00 |
| 500 | $2.05 | $1.025,00 |
| 1.000 | $1.85 | $1.850,00 |
PIC18LF27K42-I/SS Visão geral
What is a low-power 8-bit microcontroller? An MCU (microcontroller unit) is a single-chip computer integrating CPU core, Flash program memory, SRAM, EEPROM, and configurable peripherals. The PIC18 family uses an enhanced Harvard architecture with a RISC-style instruction set, and the XLP (eXtreme Low Power) designation marks devices engineered for sub-microampere sleep currents and fast wake-up. Within Microchip's taxonomy, the K42 series adds Core Independent Peripherals (CIPs) such as CLC, NCO, and PWM that operate without CPU intervention, easing real-time firmware development and allowing the core to remain in sleep for the majority of the duty cycle.
Key features include the 64MHz internal oscillator, 12-bit differential ADC2 with computation, multiple communication interfaces (UART, SPI, I2C), 25 I/O pins, vectored interrupts, DMA, MAP, DIA, DAC, comparators, and PWM peripherals on-chip. The "LF" prefix indicates a wide VDD range of 1.8V to 3.6V optimized for battery operation, while the "F" variants run from 2.3V to 5.5V. The 128KB Flash (64K x 16) supports self-programming and large protocol stacks, while 1KB EEPROM supports 100K+ write-cycle endurance for parameter storage.
The PIC18LF27K42 architecture pairs the enhanced mid-range core with vectored interrupts, a hardware multiplier/divider, and DMA channels that move data between peripherals and RAM without CPU cycles. CIP blocks (CLC, NCO, PWM, ADC-with-computation) enable deterministic peripheral chains that run independently of the CPU, allowing the core to sleep for the majority of the duty cycle and wake only on interrupt events. This combination directly enables sub-uA average power budgets typical of energy-harvesting and battery-powered IoT designs.
Typical applications include battery-powered IoT sensor nodes, wearable fitness and medical devices, low-power wireless sensor hubs, mixed-signal instrumentation, and small home appliances. The wide VDD range and low sleep current also suit remote controls, electronic shelf labels, and energy-harvesting designs where quiescent draw dominates battery life.
When designing with this device, plan to leverage the DMA plus CIP combination to keep the CPU in sleep mode as long as possible, and budget the 1KB EEPROM carefully for write-cycle endurance. Verify the 28-SSOP pinout against your board layout - the SSOP is 5.30mm wide with 0.65mm pitch and shares a footprint pattern with the F-variant and other PIC18 28-pin SSOP devices.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet - specifically the side-by-side LF-versus-F voltage range comparison, the automotive FA-{D} qualifier note, and the SSOP-versus-SO footprint tradeoff guidance.
Alternativas drop-in para PIC18LF27K42-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 PIC18LF27K42-I/SS (mesmo formato e footprint) — diferindo em Package, ADC, Comparators, Operating Temperature, Program Memory (Flash).
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F27K42-I/SS
✅ Drop-In✓ Em estoque
$1.82 / unidade
Ver ficha técnica →PIC18F27Q10-I/SS
✅ Drop-In✓ Em estoque
$1.82 / unidade
Ver ficha técnica →PIC18F27K40-I/SS
✅ Drop-In✓ Em estoque
$1.99 / unidade
Ver ficha técnica →PIC18F24Q10-I/SS
✅ Drop-In✓ Em estoque
$1.18 / unidade
Ver ficha técnica →PIC18F46K22-I/PT
✅ Drop-In✓ Em estoque
$2.32 / unidade
Ver ficha técnica →PIC18F26K22-I/SO
✅ Drop-In✓ Em estoque
$2.62 / unidade
Ver ficha técnica →PIC18LF27K42-I/SS Classificações máximas e características elétricas
| Series | PIC® XLP™ 18K |
| Core | PIC18 (8-bit enhanced Harvard, RISC) |
| Program Memory (Flash) | 128KB (64K x 16) |
| Data Memory (SRAM) | 8KB |
| EEPROM | 1KB |
| Maximum CPU Speed | 64 MHz |
| Operating Voltage (VDD) | 1.8V to 3.6V |
| I/O Pins | 25 |
| Encapsulamento | 28-SSOP (0.209 inch / 5.30mm) |
| Tipo de montagem | Surface Mount |
| ADC | 12-bit ADC2 with computation, multiple channels |
| DAC | On-chip (5-bit / 8-bit, per family datasheet) |
| Comparators | On-chip |
| PWM | Yes, with Core Independent Peripheral support |
| Communication Interfaces | UART, SPI, I2C |
| DMA | Yes |
| Vectored Interrupts | Yes |
| Core Independent Peripherals (CIP) | CLC, NCO, PWM, ADC-with-computation |
| XLP (eXtreme Low Power) | Yes |
| Temperatura de operação | -40C to +85C (Industrial) |
| Status RoHS | Compliant |
| Lead-Free | Yes |
Configuração de pinos do PIC18LF27K42-I/SS
| Pino 1 | RA0 — PORTA bit 0 (AN0/C1IN0-/C2IN0-/C3IN0-/DAC1OUT1/CLCIN0-/DAC4REF+) |
| Pino 2 | RA1 — PORTA bit 1 (AN1/C1IN1-/C2IN1-/C3IN1-/DAC1OUT2/CLCIN1-/DAC4REF-) |
| Pino 3 | RA2 — PORTA bit 2 (AN2/C1IN0+/C2IN0+/C3IN0+/DAC1REF+/CLCIN2) |
| Pino 4 | RA3 — PORTA bit 3 (AN3/C1IN1+/C2IN1+/C3IN1+/DAC1REF-) |
| Pino 5 | RA4 — PORTA bit 4 (AN4/C1OUT/C2OUT/C3OUT/CCP1/CLCIN3) |
| Pino 6 | RA5 — PORTA bit 5 (AN5/DAC2OUT1/CMP1OUT/CCP2/CLCIN4) |
| Pino 7 | RA6 — PORTA bit 6 (OSC2/CLKOUT) |
| Pino 8 | RA7 — PORTA bit 7 (OSC1/CLKIN) |
| Pino 9 | VSS — Ground reference |
| Pino 10 | RB0 — PORTB bit 0 (AN12/CWG1FLT/C1IN3+/C2IN3+/CLCIN6) |
| Pino 11 | RB1 — PORTB bit 1 (AN10/C1IN3-/C2IN3-/CLCIN7) |
| Pino 12 | RB2 — PORTB bit 2 (AN8/DAC3REF+/C2IN2+/SDA2) |
| Pino 13 | RB3 — PORTB bit 3 (AN9/DAC3REF-/C2IN2-/SCL2) |
| Pino 14 | RB4 — PORTB bit 4 (AN11/SDA1) |
| Pino 15 | RB5 — PORTB bit 5 (AN13/SCL1) |
| Pino 16 | RB6 — PORTB bit 6 (ICSPCLK/ICDCLK) |
| Pino 17 | RB7 — PORTB bit 7 (ICSPDAT/ICDDAT) |
| Pino 18 | VSS — Ground reference (also AVSS) |
| Pino 19 | VDD — Positive supply (also AVDD) |
| Pino 20 | RC0 — PORTC bit 0 (AN16/SCK1) |
| Pino 21 | RC1 — PORTC bit 1 (AN17/SDO1/CCP3) |
| Pino 22 | RC2 — PORTC bit 2 (AN18/SDI1/CCP4) |
| Pino 23 | RC3 — PORTC bit 3 (AN19/SS1/CCP5) |
| Pino 24 | RC4 — PORTC bit 4 (AN20/CK1) |
| Pino 25 | RC5 — PORTC bit 5 (AN21/RX1/DT1) |
| Pino 26 | RC6 — PORTC bit 6 (AN22/TX1/CK1) |
| Pino 27 | RC7 — PORTC bit 7 (AN23/RX1/DT1) |
| Pino 28 | MCLR — Master Clear (Reset, active low) |
Aplicações típicas
PIC18LF27K42-I/SS é adequado para 7 aplicaçãos: Battery-Powered IoT Sensor Node, Wearable Fitness and Medical Device, Low-Power Wireless Sensor Hub, Mixed-Signal Instrumentation Front-End, Electronic Shelf Label (ESL), Remote Control with Energy Harvesting, Small Home Appliance Control Board.
Battery-Powered IoT Sensor Node
The PIC18LF27K42-I/SS is purpose-built for battery-powered IoT sensor nodes that must operate at sub-1.8V and last years on a single cell. Its 1.8V-3.6V VDD range supports single-cell Li-ion deep-discharge (down to 2.5V with regulation) and 2xAA alkaline chemistries; the XLP Sleep mode drops consumption to sub-uA per the Microchip datasheet. The 12-bit ADC2 with computation enables on-die averaging and threshold detection without waking the CPU, while DMA channels move sensor data directly to RAM. CIP blocks (CLC, NCO, PWM) handle wake-up timing and signal conditioning autonomously, allowing the core to remain in Sleep across 99% of the duty cycle.
Recomendado
Wearable Fitness and Medical Device
Wearable fitness bands and disposable medical sensors demand ultra-low average current, small footprint, and reliable peripheral integration. The PIC18LF27K42-I/SS delivers all three: the 28-SSOP package occupies under 30mm² of PCB area, the LF voltage range supports 3V coin-cell chemistries, and on-chip 12-bit ADC with computation performs sensor conditioning without firmware intervention. The 1KB EEPROM stores calibration data and device serial numbers with 100K+ write endurance. Per the Microchip datasheet family document, the 64MHz CPU executes at 1.5 MIPS/MHz efficiency for FFT and biometric algorithm processing, while DMA transfers keep the core asleep during continuous sensor streaming.
Recomendado
Low-Power Wireless Sensor Hub
Wireless sensor hubs aggregate multiple analog and digital sensors and forward data over Bluetooth, LoRa, or sub-GHz radios. The PIC18LF27K42-I/SS provides the 128KB Flash required for BLE/LoRaWAN stack libraries plus 8KB RAM for protocol buffers, while the 64MHz CPU sustains real-time radio event handling. Vectored interrupts and DMA offload radio SPI/UART traffic from the CPU, and the 25 I/O pins interface multiple SPI/I2C/UART sensor channels concurrently. The wide VDD range supports Li-ion and 3V coin cells that power both the MCU and the radio module from a shared rail.
Recomendado
Mixed-Signal Instrumentation Front-End
Mixed-signal instruments combining analog front-ends, sensor excitation, and digital processing need a single-chip MCU that does both jobs well. The PIC18LF27K42-I/SS integrates a 12-bit differential ADC2 with computation, on-chip DAC, comparators, and PWM - eliminating several external analog ICs and shrinking the BOM. The CIP chain (CLC then PWM then ADC trigger) executes deterministic analog sampling sequences without CPU latency, while DMA streams ADC results into RAM for DSP. The wide LF voltage range supports both 3.3V system rails and 1.8V low-noise analog supplies from a shared or split-rail power tree.
Recomendado
Electronic Shelf Label (ESL)
Electronic shelf labels operate from coin cells for 5-10 years and wake briefly to refresh the display. The PIC18LF27K42-I/SS fits this duty profile with sub-uA Sleep current per the Microchip datasheet, LF voltage range down to 1.8V for near-end-of-life cell voltage, and DMA-driven SPI transfers to e-paper displays without waking the CPU. The 128KB Flash stores multi-language strings and bitmap fonts for diverse retail SKUs, and the 25 I/O pins drive both the SPI display and the radio wake-up signal. CIP blocks (NCO for precise radio timing) ensure deterministic refresh windows.
Recomendado
Remote Control with Energy Harvesting
Self-powered remote controls that harvest energy from button presses use MCUs that wake from Sleep in microseconds and complete the transmit handshake in milliseconds. The PIC18LF27K42-I/SS offers fast wake from Sleep (per Microchip datasheet), 64MHz CPU for sub-5ms transmit initiation, and LF voltage tolerance down to 1.8V for use with low-voltage harvesters. The 128KB Flash stores IR/RF protocol libraries (RC5, NEC, BLE pairing), and the 25 I/O pins interface the harvester, IR LED, and RF transceiver. CIP blocks (PWM + CLC) generate precise IR carrier frequencies without CPU intervention.
Recomendado
Small Home Appliance Control Board
Small home appliances such as coffee makers, slow cookers, and air purifiers need a low-cost MCU with mixed-signal peripherals and reliable firmware. The PIC18LF27K42-I/SS provides 128KB Flash for appliance control firmware, 12-bit ADC for temperature and humidity sensors, on-chip comparators for safety thresholds, and PWM for motor/valve control. The 28-SSOP package is hand-solderable for low-volume SKUs and reflow-compatible for volume production. The LF voltage range supports both 3.3V logic-level designs and battery-backed real-time clock implementations in the same BOM.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF27K42-I/SS — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F27K42-I/SS | PIC18F27Q10-I/SS | PIC18F27K40-I/SS | PIC18F24Q10-I/SS | PIC18F26K22-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP (5.30mm) | 28-SSOP (5.30mm) - same | 28-SSOP (5.30mm) - same | 28-SSOP (5.30mm) - same | 28-SSOP (5.30mm) - same | SOIC-28 (7.50mm) - wider body |
| Operating Voltage (VDD) | 1.8V to 3.6V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V |
| Flash Memory | 128KB | 128KB | 64KB | 128KB | 32KB | 64KB |
| SRAM | 8KB | 8KB | 4KB | 8KB | 2KB | 4KB |
| EEPROM | 1KB | 1KB | 1KB | 1KB | 1KB | 1KB |
| Maximum CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| I/O Pins | 25 | 25 | 25 | 25 | 25 | 25 |
| Core Independent Peripherals (CIP) | CLC, NCO, PWM, ADC-with-computation | CLC, NCO, PWM, ADC-with-computation | PWM, ADC-with-computation (no CLC/NCO) | PWM, ADC-with-computation (no CLC/NCO) | PWM, ADC-with-computation (no CLC/NCO) | PWM, ADC (no K42 CIP enhancements) |
| Unit Price (1 qty) | $2.95 | $2.85 | $2.50 | $2.95 | $2.10 | $3.20 |
Principais diferenciais
- LF voltage range supports 1.8V battery operation (vs PIC18F27K42-I/SS)
- Full K42 CIP block set (CLC, NCO, PWM, ADC-with-computation) (vs PIC18F27K40-I/SS)
- 28-SSOP package supports narrow-body PCB layout (vs PIC18F26K22-I/SO)
Notas de projeto
Estimated: at VDD=3.3V, 64MHz active, typical IDD is approximately 8-12 mA. In Sleep mode with peripherals off, XLP parts achieve sub-uA quiescent current per the Microchip datasheet family document. To minimize average consumption in duty-cycled designs, place the CPU in Sleep as soon as active processing completes and use the ADC2 Auto-Conversion feature plus DMA to capture sensor data without firmware intervention. Enable the WDT only when fail-safe recovery is required, since the WDT adds ~1 uA to Sleep current.
Place decoupling capacitors (100 nF ceramic + 1 uF ceramic in parallel) as close as possible to the VDD pin (pin 19) and VSS pin (pin 18). For 28-SSOP hand-soldering or low-volume production, add a small ground pour under the IC body and route the analog AVSS pin (shared with VSS) directly to the ground pour. The 28-SSOP has 0.65mm pitch - keep traces at least 0.15mm wide and use solder mask slivers between pads to reduce solder bridges during reflow.
Do not exceed the 3.6V absolute maximum VDD for the LF variant - battery packs at end-of-charge or USB-VBUS transients can push voltage above this limit and cause EOS damage. Always include a TVS diode or Zener clamp on VDD for hot-swap-tolerant designs. Verify the MCLR pin (pin 28) has the required 10k pull-up resistor; floating MCLR prevents startup. For ICSP programming, ensure pins RB6/RB7 are accessible on the board - they are not available as general-purpose I/O when the ICSP header is connected.
The 64MHz internal oscillator drives the CPU core, so external crystals are not required for most designs. If your application requires precise timing (USB, CAN, or UART at non-standard baud rates), consider the PIC18F27K42 with external crystal on RA6/RA7. Place the optional 32.768 kHz crystal within 5mm of the SOSCO/SOSCI pins with a guarded ground plane to minimize noise coupling. For mixed-signal designs, route analog signals (AN0-AN23) away from PWM outputs and digital switching traces to avoid ADC noise pickup.
Informações de conformidade
Industrial temperature grade -40C to +85C; not AEC-Q100 qualified - choose FA- automotive variants for AEC-Q100 designs. RoHS and lead-free compliant per Microchip product page.
