PIC18LF27K42-E/SP - 64MHz 8-Bit XLP MCU, 128KB Flash | Microchip
Teilenummer: PIC18LF27K42-E/SP ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $3.75 | $3,75 |
| 10 | $3.38 | $33,80 |
| 100 | $2.95 | $295,00 |
| 500 | $2.62 | $1.310,00 |
| 1.000 | $2.32 | $2.320,00 |
PIC18LF27K42-E/SP Übersicht
An 8-bit microcontroller (MCU) is a small, low-power computer-on-a-chip built around an 8-bit data path. In the semiconductor hierarchy, MCUs sit inside the broad category of embedded processors -> microcontrollers -> 8-bit MCUs. The "PIC" prefix is Microchip's proprietary Harvard-architecture RISC core, while "18" denotes the high-performance family with linear memory, C-compiler friendliness, and rich peripherals. The "LF" letter indicates the low-voltage variant (1.8V-3.6V VDD), while the "K42" sub-family adds XLP (eXtreme Low Power) technology for battery-friendly designs.
Key features of the PIC18LF27K42-E/SP include: 64MHz internal oscillator with PLL, 128KB self-programmable Flash (64K x 16 words), 8KB SRAM, 1KB EEPROM, 12-bit ADC2 with up to 24 channels, 5-bit/8-bit DAC, 2 comparators, DMA controller, vectored interrupts, Peripheral Pin Select (PPS), UART/SPI/I2C, Complementary Waveform Generator (CWG), High-Side Low-Side Timer (HLT), Windowed WWDT, CRC/SCAN, IDLE/DOZE/PMD power modes, and Math Accelerator (MAC). The 28-SPDIP footprint matches the legacy PIC18 28-pin DIP standard for breadboard-friendly prototyping and field replacement.
Architecturally, the K42 series uses a 16-bit modified Harvard core with a 31-level hardware stack, hardware multiplier, and an interrupt controller supporting vectored priorities. Peripherals are mapped via the PPS matrix, which lets nearly any digital peripheral function be assigned to most I/O pins, simplifying PCB routing and BOM reuse across the family.
Typical applications include low-power IoT sensor nodes, industrial control and HMI panels, automotive body and LIN nodes, battery-powered instrumentation, LED lighting controllers, USB-CDC human-interface devices, and consumer white-goods motor control. Designers favor this part when migrating legacy PIC18F code while gaining modern peripherals and aggressive low-power modes.
When designing with this MCU, plan the VDD rail for 1.8V-3.6V (the LF variant), provide a 100nF decoupling capacitor near each power pin, and assign PPS mappings early in firmware to lock the PCB layout. For the automotive -E (extended) grade, ambient temperature spans -40°C to +125°C.
This page synthesizes the official Microchip datasheet family specifications with verified distributor pricing, drop-in alternatives within the K42 family, and practical design notes not found in a single datasheet excerpt.
Drop-in-Alternativen für PIC18LF27K42-E/SP – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC18LF27K42-E/SP (gleiche Bauform und Footprint) – abweichend in ADC, Comparators, DAC, Mounting Type, Package.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC18LF27K42-I/SP
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC18F27K42-E/SP
✅ Drop-In✓ Auf Lager
$2.21 / Stück
Datenblatt ansehen →PIC18LF26K42-E/SP
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC18LF27K40-I/SP
✅ Drop-In✓ Auf Lager
$1.95 / Stück
Datenblatt ansehen →PIC18LF27K42-E/SP Grenzwerte & elektrische Eigenschaften
| Core Architecture | PIC 8-bit RISC (Harvard, 16-bit instructions) |
| Family | PIC18F/LF2X/4X/5XK42 (XLP) |
| Program Memory (Flash) | 128 KB (64K x 16 words) |
| Data SRAM | 8 KB |
| EEPROM | 1 KB |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage (VDD) | 1.8 V to 3.6 V (LF variant) |
| ADC | 12-bit ADC2 with computation, up to 24 channels |
| DAC | 5-bit / 8-bit DAC |
| Comparators | 2 x rail-to-rail |
| Timers/PWM | Multiple 16-bit timers, PWM, CWG, HLT |
| Communication | UART, SPI, I2C (with PPS) |
| DMA | Yes (direct memory access controller) |
| Gehäuse | 28-SPDIP (0.300 in / 7.62 mm) |
| Montageart | Through-Hole |
| Temperature Grade | Extended (-40C to +125C) - "E" suffix |
| RoHS-Status | Compliant (verify per lot) |
| Peripheral Pin Select (PPS) | Yes |
| Windowed Watchdog Timer | Yes (WWDT) |
| CRC/SCAN | Yes |
PIC18LF27K42-E/SP Pin-Konfiguration
| Pin 1 | RA2 — Port A bit 2 (PPS-capable digital I/O, analog input) |
| Pin 2 | RA3 — Port A bit 3 (PPS-capable digital I/O, analog input) |
| Pin 3 | RA4 — Port A bit 4 (PPS-capable digital I/O, analog input) |
| Pin 4 | RA5 — Port A bit 5 (PPS-capable digital I/O, analog input) |
| Pin 5 | RA6 — Port A bit 6 (PPS-capable digital I/O, analog input) |
| Pin 6 | RA7 — Port A bit 7 (PPS-capable digital I/O, analog input, OSC1 alt) |
| Pin 7 | VDD — Positive power supply (1.8V-3.6V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA0 — Port A bit 0 (PPS-capable digital I/O, analog input) |
| Pin 10 | RA1 — Port A bit 1 (PPS-capable digital I/O, analog input) |
| Pin 11 | RB0 — Port B bit 0 (PPS-capable digital I/O, analog input) |
| Pin 12 | RB1 — Port B bit 1 (PPS-capable digital I/O, analog input) |
| Pin 13 | RB2 — Port B bit 2 (PPS-capable digital I/O, analog input) |
| Pin 14 | RB3 — Port B bit 3 (PPS-capable digital I/O, analog input) |
| Pin 15 | RB4 — Port B bit 4 (PPS-capable digital I/O, analog input) |
| Pin 16 | RB5 — Port B bit 5 (PPS-capable digital I/O, analog input) |
| Pin 17 | RB6 — Port B bit 6 (PPS-capable digital I/O, ICSPCLK) |
| Pin 18 | RB7 — Port B bit 7 (PPS-capable digital I/O, ICSPDAT) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive power supply (1.8V-3.6V) |
| Pin 21 | RC0 — Port C bit 0 (PPS-capable digital I/O, analog input) |
| Pin 22 | RC1 — Port C bit 1 (PPS-capable digital I/O, analog input) |
| Pin 23 | RC2 — Port C bit 2 (PPS-capable digital I/O, analog input) |
| Pin 24 | RC3 — Port C bit 3 (PPS-capable digital I/O, analog input) |
| Pin 25 | RC4 — Port C bit 4 (PPS-capable digital I/O, analog input) |
| Pin 26 | RC5 — Port C bit 5 (PPS-capable digital I/O, analog input) |
| Pin 27 | RC6 — Port C bit 6 (PPS-capable digital I/O, analog input) |
| Pin 28 | RC7 — Port C bit 7 (PPS-capable digital I/O, analog input) |
Typische Anwendungen
PIC18LF27K42-E/SP ist geeignet für 7 Anwendungs: Low-Power IoT Sensor Nodes, Industrial Control & HMI Panels, Automotive Body & LIN Bus Nodes, Battery-Powered Instrumentation, LED Lighting Controllers, Consumer White-Goods Motor Control, USB-CDC Human-Interface Devices (with bridge).
Low-Power IoT Sensor Nodes
The PIC18LF27K42-E/SP is well suited for battery-powered IoT sensor nodes thanks to its 1.8V-3.6V VDD range, XLP deep-sleep modes, and 64MHz performance headroom for edge processing. Its 12-bit ADC2 with computation can sample multiple sensors while DMA offloads memory moves, allowing the CPU to remain in sleep for extended periods. With 128 KB Flash the device comfortably hosts an RTOS-light scheduler, a wireless stack shim, and OTA bootloader. Designers place a 100nF + 1uF decoupling network near the VDD/AVDD pins and route the PPS-assigned I2C/SPI lines to a sub-GHz or BLE module. Compared with discrete 8-bit designs, the integrated DAC and comparators eliminate external signal-conditioning circuitry for many sensor front-ends.
Empfohlen
Industrial Control & HMI Panels
In industrial control panels, the PIC18LF27K42-E/SP drives keypad scanning, LED/PWM feedback, and isolated UART-to-host communication. Its vectored interrupts and DMA controller let the firmware react to multiple field-bus events deterministically without missing edges. The 64MHz CPU executes control loops in under 250ns per instruction, while the 12-bit ADC2 with oversampling reads 4-20mA current loops with sufficient resolution for process-variable monitoring. Extended -40C to +125C temperature grade supports factory-floor cabinet deployment. A typical design wires the CWG to drive opto-isolated MOSFET half-bridges, the comparators to detect over-current faults, and PPS to remap UART pins without board rework.
Empfohlen
Automotive Body & LIN Bus Nodes
Automotive body controllers using the K42 family benefit from the extended -40C to +125C temperature grade and the integrated LIN-compatible UART with PPS routing. The PIC18LF27K42-E/SP handles seat-control, mirror-adjust, and interior-lighting modules where deterministic response and low quiescent current are critical. The Windowed WWDT and CRC/SCAN peripherals satisfy OEM watchdog and memory-integrity requirements, while DMA keeps the LIN bus servicing latency low even during ADC bursts. Designers typically pair the MCU with a LIN transceiver such as MCP2003B and a 5V LDO when used on a 12V vehicle bus. Note that for full AEC-Q100 Grade 0/1 qualification, the -Q1 suffix variants are preferred.
Empfohlen
Battery-Powered Instrumentation
The PIC18LF27K42-E/SP runs instrumentation such as portable multimeters, handheld thermometers, and field data loggers from 2xAA or Li-Ion cells. The XLP nanoWatt XLP technology drops quiescent consumption below 50 nA in deep sleep with RTC running on an external 32 kHz crystal, allowing multi-year battery life for duty-cycled measurement. The 12-bit ADC2 with computation performs hardware-averaged readings without waking the CPU, while the integrated DAC and comparators enable stimulus/sense architectures. The 28-SPDIP package is friendly to hand-soldered prototypes and field-replaceable modules, and 128 KB Flash accommodates calibration tables and user-interface graphics strings.
Empfohlen
LED Lighting Controllers
The PIC18LF27K42-E/SP drives multi-channel LED lighting controllers, from architectural dimmers to RGBW strips, by combining CWG, PWM, and DMA. The CWG generates complementary dead-time-controlled outputs for synchronous-buck LED drivers, while independent PWM channels manage per-string dimming. DMA keeps color-mixing algorithms running without CPU intervention, freeing cycles for ambient-light sensing via the 12-bit ADC2. The LF voltage range suits constant-current LED drivers powered from 3.3V rails, and the comparators provide over-temperature and over-current shutdown paths. Designers route PWM through PPS to optimize PCB star-ground topology.
Empfohlen
Consumer White-Goods Motor Control
In washing machines, dishwashers, and small appliances, the PIC18LF27K42-E/SP executes sensorless BLDC or single-phase AC motor control loops. The CWG and HLT peripherals synthesize center-aligned PWM with programmable dead time, while the ADC2 samples back-EMF at zero-cross events for commutation timing. PPS lets designers reassign timer pins to optimize PCB routing around the motor-drive stage. The 1.8V-3.6V range supports 3.3V-regulated rails derived from rectified mains, and 128 KB Flash stores lookup tables, protection state machines, and UI handlers. Extended temperature grade survives the appliance thermal environment.
Empfohlen
USB-CDC Human-Interface Devices (with bridge)
The PIC18LF27K42-E/SP itself lacks native USB, but paired with a Microchip MCP2200 USB-to-UART bridge it implements USB-CDC class devices (HID keyboards, custom HID, virtual COM ports). The K42's UART with DMA sustains high-throughput CDC traffic while the CPU services HID descriptors, and 128 KB Flash accommodates USB stacks and vendor-specific reports. The 1.8V-3.6V rail matches MCP2200 logic levels, simplifying level shifting. This combination is a low-cost path to USB HID without migrating to the PIC18F47K42 USB variant.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC18LF27K42-E/SP – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC18LF27K42-I/SP | PIC18F27K42-E/SP | PIC18LF26K42-E/SP | PIC18LF27K40-I/SP |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP (0.300 in) | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Program Memory (Flash) | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 128 KB |
| Data SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| Operating Voltage (VDD) | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 4.0 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Temperature Grade | Extended -40C to +125C (-E) | Industrial -40C to +85C (-I) | Extended -40C to +125C (-E) | Extended -40C to +125C (-E) | Industrial -40C to +85C (-I) |
| ADC / DAC | 12-bit ADC2 / 5-8-bit DAC | Same | Same | Same | K40 reduced peripheral set |
Wichtigste Unterscheidungsmerkmale
- Lowest-voltage LF variant with extended temperature grade (vs. PIC18LF27K42-I/SP)
- Direct 5V drop-in path available within the same K42 family (vs. PIC18F27K42-E/SP)
- 128 KB Flash vs half-memory K42 cousins (vs. PIC18LF26K42-E/SP)
Designhinweise
Place a 100nF ceramic decoupling capacitor within 5mm of each VDD/AVDD pin (pins 7, 20) and a single bulk 10uF tantalum or ceramic near the package. The K42 family's ADC2 is sensitive to VDD ripple; route AVDD through a ferrite bead from VDD and decouple AVSS directly to the analog ground pour. For battery designs, switch between VDD and the always-on backup domain carefully to avoid in-rush current that wakes the MCU unintentionally.
Do not exceed 3.6V on the LF variant VDD - this permanently damages the part. Use PIC18F27K42 (5V) instead when the system rail is above 3.6V. PPS remapping must be locked in firmware before peripheral initialization; remapping a peripheral to a pin that is also configured as analog at reset causes the digital input buffer to fight the analog signal and may cause ADC inaccuracies. Verify unused I/O pins are configured as outputs low or inputs with the WPU disabled to minimize leakage.
At 64MHz the PIC18LF27K42-E/SP can dissipate up to ~40mW internally with all peripherals active, but the dominant thermal stress in most designs is self-heating from output pin drive current (each I/O can source/sink 25mA, total limit 200mA). For high-current loads, use a buffer transistor or FET driver. The -E extended temperature grade (-40C to +125C) refers to ambient, not junction; keep junction below 150C by derating I/O drive when the ambient is high.
The 28-SPDIP package has standard 0.1 inch (2.54mm) pin pitch; reserve 0.6mm clearance between traces and through-hole pads and use a ground pour on the top layer stitched to a ground pour on the bottom via 0.3mm vias. Keep the ICSP header (RB6/RB7) accessible in prototype designs to enable in-circuit debugging with PICkit 4 or MPLAB Snap. For mixed-signal designs, separate analog ground (AGND tied to AVSS pin) and digital ground (DGND tied to VSS pins) and join them at a single point near the MCU.
Long traces from RB6/RB7 (ICSP) can couple noise into adjacent analog inputs. Keep ICSP traces under 50mm if possible and route them away from ADC2 inputs. PPS-assigned peripherals such as UART or PWM that toggle high dv/dt lines should be kept short, with a series resistor (33-100 ohm) near the MCU pin if the trace exceeds 25mm. The DMA controller is ideal for moving ADC2 result buffers without CPU intervention - use it to reduce interrupt jitter on sensitive measurements.
Compliance-Informationen
RoHS and REACH compliance per Microchip environmental declarations. The -E temperature suffix indicates extended -40C to +125C industrial/automotive operating range, but the part itself is not AEC-Q100 qualified unless ordered with the -Q1 suffix. Halogen-free packaging per Microchip product page.
