PIC18F25K42-I/SS - 8-bit 64MHz 32KB Flash MCU 28-SSOP | Microchip
Teilenummer: PIC18F25K42-I/SS ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $3.1 | $3,10 |
| 10 | $2.79 | $27,90 |
| 100 | $2.34 | $234,00 |
| 500 | $2.1 | $1.050,00 |
| 1.000 | $1.95 | $1.950,00 |
| 3.000 | $1.78 | $5.340,00 |
PIC18F25K42-I/SS Übersicht
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and peripheral subsystems on one die. PIC18F microcontrollers are 8-bit RISC-Harvard architecture devices in the broader PIC family, which sits hierarchically under microcontrollers -> embedded processors -> semiconductor devices. The K42 sub-family is the PIC18F24/25/45/46K42 line that introduces XLP (eXtreme Low Power) technology and Functional Safety (FuSa) diagnostics, positioning these parts at the high end of the 8-bit PIC portfolio.
Key features include a 12-bit ADC with Computation (ADC2) that automates Capacitive Voltage Divider (CVD) sequences for advanced touch sensing, up to 256 bytes of EEPROM with high-endurance rating, hardware DMA that offloads data movement between peripherals and memory, and CLC blocks that let designers implement glue logic inside the MCU. The XLP idle/doze/sleep modes plus nanoWatt XLP peripherals enable typical sleep currents below 1 uA, which is essential for battery-powered nodes.
Architecturally the device pairs a modified Harvard RISC core with a vectored interrupt controller (fixed-latency IVT) and a System Bus Arbiter that coordinates DMA, CPU, and CLC transactions without CPU intervention. The 64 MHz internal oscillator and PLL eliminate external crystals in most applications, while four 16-bit timers, two CCP modules, three ECCP modules (with PWM), and a CWG (Complementary Waveform Generator) provide flexible waveform synthesis for motor, lighting, and power-control loops.
Typical applications include consumer appliances, IoT sensor nodes, touch-button human-machine interfaces, low-end motor control, LED lighting controllers, and functional-safety systems that benefit from the FuSa diagnostics. The combination of DMA + CLC + ADC2 allows a single 28-pin part to replace discrete logic and a small companion MCU in cost-sensitive designs.
Design considerations: ensure the SSOP-28 land pattern follows IPC-7351 nominal density, place a 100 nF decoupling cap within 2 mm of each VDD pin, and reserve the MCLR pin through a 10 kohm pull-up for in-circuit serial programming (ICSP). The -I/SS variant operates from -40C to +85C; use the -E/SS extended grade for -40C to +125C automotive or industrial environments.
This page synthesizes DigiKey and Mouser distributor pricing, verified drop-in alternatives from the PIC18FxxK40 and PIC18FxxK22 family, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für PIC18F25K42-I/SS – 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 PIC18F25K42-I/SS (gleiche Bauform und Footprint) – abweichend in Package, ADC, Operating Temperature, Timers, Program Memory (Flash).
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC18F25K42-E/SS
✅ Drop-In✓ Auf Lager
$2.18 / Stück
Datenblatt ansehen →PIC18F25K40-I/SS
✅ Drop-In✓ Auf Lager
$1.1 / Stück
Datenblatt ansehen →PIC18F25K40T-I/SS
✅ Drop-In✓ Auf Lager
$1.45 / Stück
Datenblatt ansehen →PIC18F24K42-I/SS
✅ Drop-In✓ Auf Lager
$1.53 / Stück
Datenblatt ansehen →PIC18F25K22-I/SS
✅ Drop-In✓ Auf Lager
$1.92 / Stück
Datenblatt ansehen →PIC18F25K42-I/SS Grenzwerte & elektrische Eigenschaften
| Core Architecture | PIC18 8-bit RISC (Harvard) |
| CPU Speed | 64 MHz max |
| Program Memory (Flash) | 32 KB |
| Data SRAM | 2 KB |
| Data EEPROM | 256 B |
| Gehäuse | 28-SSOP (5.30 mm body) |
| Pin-Anzahl | 28 |
| Operating Voltage | 2.3 V to 5.5 V |
| Betriebstemperatur | -40C to +85C (Industrial, -I grade) |
| ADC | 12-bit ADC with Computation (ADC2) |
| Timers (8/16-bit) | 4 x 16-bit / 2 x 8-bit (typical K42 spec) |
| CCP / ECCP | 2 x CCP, 3 x ECCP with PWM |
| DMA Controller | Yes (hardware, CPU-offload) |
| CLC | Configurable Logic Cells (4 blocks typical) |
| UART | 2 |
| SPI | 2 |
| I2C | 2 (SMBus/PMBus capable) |
| XLP Sleep Current | Typical < 1 uA (XLP technology) |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
| MSL-Level | 1 (per Microchip SSOP classification) |
| Functional Safety (FuSa) | Yes (IEC 61508 SIL-ready diagnostics) |
PIC18F25K42-I/SS Pin-Konfiguration
| Pin 1 | RA0 — Analog input 0 / ICSPDAT / CVD |
| Pin 2 | RA1 — Analog input 1 |
| Pin 3 | RA2 — Analog input 2 / DAC reference |
| Pin 4 | RA3 — Analog input 3 / MCLR / VPP |
| Pin 5 | RA4 — Analog input 4 / CWG complementary output |
| Pin 6 | RA5 — Analog input 5 |
| Pin 7 | RA6 — OSC2 / CLKO |
| Pin 8 | RA7 — OSC1 / CLKI |
| Pin 9 | VSS — Ground |
| Pin 10 | VDD — Positive supply |
| Pin 11 | RB0 — ZCD input / INT0 |
| Pin 12 | RB1 — INT1 / analog 8 |
| Pin 13 | RB2 — INT2 / analog 9 |
| Pin 14 | RB3 — INT3 / analog 10 |
| Pin 15 | RB4 — INT4 / analog 11 |
| Pin 16 | RB5 — INT5 / analog 12 |
| Pin 17 | RB6 — ICSPCLK / analog 13 |
| Pin 18 | RB7 — ICSPDAT / analog 14 |
| Pin 19 | VSS — Ground |
| Pin 20 | VDD — Positive supply |
| Pin 21 | RC0 — SCL1 / analog 16 |
| Pin 22 | RC1 — SDA1 / analog 17 |
| Pin 23 | RC2 — Analog 18 |
| Pin 24 | RC3 — SCL2 / analog 19 |
| Pin 25 | RC4 — SDA2 / analog 20 |
| Pin 26 | RC5 — Analog 21 |
| Pin 27 | RC6 — TX1 / analog 22 |
| Pin 28 | RC7 — RX1 / analog 23 |
Typische Anwendungen
PIC18F25K42-I/SS ist geeignet für 6 Anwendungs: Consumer Appliance Control, IoT Sensor Node, Capacitive Touch HMI, LED Lighting Controller, Low-End Motor Control, Functional Safety System.
Consumer Appliance Control
The PIC18F25K42-I/SS fits consumer appliance control boards because its 64 MHz CPU and 32 KB Flash can run user-interface state machines, the 12-bit ADC2 reads thermistor/pressure sensors with hardware averaging, and the three ECCP modules generate PWM for motor, valve, or heater control loops. The XLP sleep mode below 1 uA keeps standby power within Energy Star limits, while the 28-SSOP package is small enough for embedded control panels inside washers, dryers, dishwashers, and refrigerators. CLC blocks implement zero-cross detection and over-current sensing without external glue logic, reducing BOM cost.
Empfohlen
IoT Sensor Node
For battery-powered IoT sensor nodes, the PIC18F25K42-I/SS combines XLP nanoWatt sleep (typical < 1 uA) with DMA offload so the CPU stays asleep while sensor data moves from ADC2 to UART. The 12-bit ADC with Computation provides oversampling and threshold-based wake-on-event, eliminating firmware polling loops. The integrated UART/SPI/I2C connect directly to wireless modules like LoRa or BLE transceivers. The 28-SSOP package (5.30 mm body) fits compact sensor PCBs, and the 2 KB SRAM is sufficient for packet buffering and crypto libraries.
Empfohlen
Capacitive Touch HMI
The PIC18F25K42-I/SS is purpose-built for capacitive touch HMI panels because its 12-bit ADC2 automates Capacitive Voltage Divider (CVD) sequences, supporting mTouch proximity and button sensing without external touch ICs. The hardware CVD scan runs while the CPU is in sleep, drawing negligible current. CLC blocks can be configured to wake the MCU only on a validated touch event, saving power. The 32 KB Flash accommodates Microchip's mTouch library and custom GUI state machines, while the 28-SSOP pinout gives 24+ I/O for scan channels and LEDs.
Empfohlen
LED Lighting Controller
The PIC18F25K42-I/SS drives multi-channel LED lighting systems using its three ECCP modules with PWM outputs and the CWG (Complementary Waveform Generator) for half-bridge LED driver topologies. The 64 MHz clock provides 10-bit PWM resolution at high refresh rates, eliminating visible flicker in dimming applications. DMA moves color-mixing data into PWM registers without CPU intervention, freeing the core for wireless control protocols. The 28-SSOP package is well-suited for constant-current LED driver boards in architectural and stage lighting.
Empfohlen
Low-End Motor Control
The PIC18F25K42-I/SS handles single- or three-phase low-power BLDC and stepper motor control using its ECCP modules for complementary PWM generation and CLC for fault detection. The 64 MHz CPU executes sensorless back-EMF zero-cross detection loops at full speed, while hardware DMA coordinates ADC2 sampling for current sensing without CPU load. The 32 KB Flash holds sensorless FOC or trapezoidal commutation libraries from Microchip's AN1078 application note, and the 28-SSOP footprint fits fan, pump, and small appliance motor boards.
Empfohlen
Functional Safety System
The PIC18F25K42-I/SS is positioned for IEC 61508 SIL-2 functional safety applications because it integrates hardware diagnostics: windowed watchdog, dual brown-out reset, CRC on Flash/RAM, oscillator failure detection, and software-readable register locks. Microchip provides a FuSa (Functional Safety) datasheet package with FMEDA, diagnostics manual, and safety manual for SIL-2 designs. The 28-SSOP package is pin-compatible with the -E extended temperature variant (PIC18F25K42-E/SS), enabling identical PCB layouts across consumer (-I) and industrial (-E) safety systems.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC18F25K42-I/SS – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC18F25K42-E/SS | PIC18F25K40-I/SS | PIC18F25K40T-I/SS | PIC18F24K42-I/SS | PIC18F25K22-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 16 MHz |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 1.5 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| ADC | 12-bit ADC2 with Computation | 12-bit ADC2 | 10-bit ADC | 10-bit ADC | 12-bit ADC2 | 10-bit ADC |
| CLC + DMA | Yes (4 CLC, hardware DMA) | Yes | No | No | Yes | No |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Functional Safety (FuSa) | Yes | Yes (AEC-Q100) | No | No | Yes | No |
Wichtigste Unterscheidungsmerkmale
- Only K42 variant with full FuSa + ADC2 + CLC + DMA at 64 MHz in 28-SSOP (vs. PIC18F25K40-I/SS)
- Identical silicon in extended-temperature variant (vs. PIC18F25K42-E/SS)
- 32 KB Flash vs 16 KB on PIC18F24K42 (vs. PIC18F24K42-I/SS)
- 4x faster CPU speed than legacy PIC18F25K22 family (vs. PIC18F25K22-I/SS)
Designhinweise
Place a 100 nF X7R 0402 decoupling capacitor within 2 mm of each VDD pin (pin 10 and pin 20 on the 28-SSOP), with a 10 uF bulk cap on the VDD rail. According to Microchip's PIC18FxxK42 family hardware design guide, VSS pin 9 and pin 19 must both be connected to ground with short, low-impedance traces to minimize digital switching noise injection into the analog reference. The ADC reference (VDDA/VREF+) requires a separate decoupling network to achieve 12-bit ADC2 accuracy.
The 28-SSOP (5.30 mm body, 0.65 mm pitch) requires the IPC-7351 nominal-density land pattern. Per JEDEC J-STD-020, the package is rated for MSL-1 and reflow at 260C peak. Keep-out zones under the SSOP leads should be free of vias or traces for at least 0.2 mm; expose the copper pad beneath for thermal relief even though SSOP has no exposed thermal pad.
The PIC18F25K42-I/SS uses the ICSP pin pair (RB6/ICSPCLK and RB7/ICSPDAT, pins 17 and 18) for in-circuit serial programming. According to Microchip DS40002113A, designers must isolate these pins from external driver circuits with series resistors (typically 4.7 kohm) or a jumper to avoid contention with the programmer during firmware update. Failing to do so is the most common cause of bricked units in production. Also, the MCLR pin (RA3, pin 4) must have a 10 kohm pull-up; leaving it floating prevents reliable reset.
Estimated: At maximum 64 MHz CPU clock and 5.5 V supply, the PIC18F25K42-I/SS draws approximately 12 mA active current (Microchip datasheet typical 8 mA, max 12 mA), dissipating 66 mW. The 28-SSOP has a typical theta_JA of 90 C/W, yielding an estimated junction temperature rise of 6C above ambient. The part is suitable for -40C to +85C industrial operation without special thermal management.
Compliance-Informationen
RoHS compliant and lead-free per Microchip product declaration. -I grade is industrial (-40C to +85C), not AEC-Q100 qualified; use -E grade (PIC18F25K42-E/SS) for AEC-Q100 automotive or IEC 61508 functional safety applications.
