PIC18F47K42T-I/PT - 64MHz 128KB Flash 8-bit MCU | Microchip
MPN: PIC18F47K42T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.05 | $4.05 |
| 10 | $3.65 | $36.50 |
| 100 | $3.25 | $325.00 |
| 500 | $2.92 | $1,460.00 |
| 1,000 | $2.62 | $2,620.00 |
PIC18F47K42T-I/PT Overview
A microcontroller, often abbreviated MCU, is a single-chip processor that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces. PIC microcontrollers are 8-bit RISC-flavored Harvard-architecture controllers widely used in industrial, consumer, and automotive subsystems where predictable interrupt latency and long-term supply continuity matter more than raw MHz.
Key features include a 12-bit ADC2 with up to 35 channels of analog input, a 5-bit/8-bit DAC output, dual rail-to-rail comparators, complementary waveform generators for advanced PWM, and support for a 1.8V to 5.5V supply range. The PT package is a 10 mm × 10 mm TQFP-44 with 36 general-purpose I/O pins plus dedicated oscillator, programming, and reset pins, allowing direct replacement for PIC18F46K42 / PIC18F45K42 designs that use the same footprint.
The device is implemented in an enhanced flash process and integrates a multi-stage instruction pipeline, hardware multiplier, and zero-pin overhead background debug (ICSP). These attributes enable C-compiled firmware to deliver real-time motor control, sensor fusion, and user-interface response while preserving wide operating headroom down to 1.8V.
Typical applications include industrial control panels, sensor hub designs, low-power IoT edge nodes, USB-free human-interface peripherals, and cost-sensitive automotive body modules. The vectored interrupt controller and DMA paths reduce CPU loading when multiple sensor streams are sampled concurrently.
When designing with this part, prefer the TQFP-44 footprint only if a 10x10 mm land pattern is acceptable - the alternate -I/PT pinout is the 8-bit bare variant without an internal op amp. Use external bypass capacitors of 100 nF plus 10 µF near VDD and add a decoupling cap on AVDD for ADC2 accuracy.
This page consolidates distributor pricing, pin-compatible alternatives within the PIC18 K42 family, and practical design guidance - a synthesis that goes beyond the manufacturer datasheet alone.
Drop-in alternatives for PIC18F47K42T-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18F47K42T-I/PT (same form factor and footprint) — differing in Package, ADC, Comparators, DAC, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F47K42-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F47K42-E/PT
✅ Drop-In✓ In Stock
$2.6 / Unit
View Datasheet →PIC18F47K40T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F46K42T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F45K42T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F47K42T-I/PT Maximum Ratings & Electrical Characteristics
| Core | PIC18 XLP (8-bit) |
| Program Memory (Flash) | 128 KB (64K x 16) |
| SRAM | 8 KB |
| EEPROM | 1 KB |
| Maximum CPU Speed | 64 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Package | TQFP-44 (PT), 10 x 10 mm |
| Operating Temperature | -40 C to +85 C (Industrial) |
| GPIO Pins | 36 |
| ADC | 12-bit ADC2, up to 35 channels |
| DAC | 5-bit / 8-bit DAC |
| Comparators | 2 (rail-to-rail) |
| PWM | Multiple Complementary PWM outputs |
| Peripheral Interface | UART, SPI, I2C, DMA, MAP, PIC vector interrupts |
| Mounting Type | Surface Mount |
| RoHS Status | RoHS Compliant |
PIC18F47K42T-I/PT Pin Configuration
| Pin 1 | RB0 — GPIO port B bit 0 / IOC |
| Pin 2 | RB1 — GPIO port B bit 1 / SDA |
| Pin 3 | RB2 — GPIO port B bit 2 / SCL |
| Pin 4 | RB3 — GPIO port B bit 3 / PWM |
| Pin 5 | RB4 — GPIO port B bit 4 |
| Pin 6 | RB5 — GPIO port B bit 5 |
| Pin 7 | RB6 — ICSP clock / PGC |
| Pin 8 | RB7 — ICSP data / PGD |
| Pin 9 | RA0 — GPIO port A bit 0 / analog |
| Pin 10 | RA1 — GPIO port A bit 1 / analog |
| Pin 11 | RA2 — GPIO port A bit 2 / analog |
| Pin 12 | RA3 — GPIO port A bit 3 / analog Vref+ |
| Pin 13 | VDD — Core supply voltage |
| Pin 14 | VSS — Ground reference |
| Pin 15 | RA4 — GPIO port A bit 4 |
| Pin 16 | RA5 — GPIO port A bit 5 |
| Pin 17 | RA6 — GPIO port A bit 6 / oscillator |
| Pin 18 | RA7 — GPIO port A bit 7 / oscillator |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Core supply voltage |
| Pin 21 | RC0 — GPIO port C bit 0 |
| Pin 22 | RC1 — GPIO port C bit 1 |
| Pin 23 | RC2 — GPIO port C bit 2 |
| Pin 24 | RC3 — GPIO port C bit 3 / SPI |
| Pin 25 | RC4 — GPIO port C bit 4 |
| Pin 26 | RC5 — GPIO port C bit 5 |
| Pin 27 | RC6 — GPIO port C bit 6 / UART TX |
| Pin 28 | RC7 — GPIO port C bit 7 / UART RX |
| Pin 29 | RE0 — GPIO port E bit 0 |
| Pin 30 | RE1 — GPIO port E bit 1 |
| Pin 31 | RE2 — GPIO port E bit 2 |
| Pin 32 | RE3 — GPIO port E bit 3 |
| Pin 33 | MCLR — Master clear / reset input |
| Pin 34 | RD0 — GPIO port D bit 0 |
| Pin 35 | RD1 — GPIO port D bit 1 |
| Pin 36 | RD2 — GPIO port D bit 2 |
| Pin 37 | RD3 — GPIO port D bit 3 |
| Pin 38 | RD4 — GPIO port D bit 4 |
| Pin 39 | RD5 — GPIO port D bit 5 |
| Pin 40 | RD6 — GPIO port D bit 6 |
| Pin 41 | RD7 — GPIO port D bit 7 |
| Pin 42 | VSS — Ground reference |
| Pin 43 | AVSS — Analog ground reference |
| Pin 44 | AVDD — Analog supply voltage |
Typical Applications
PIC18F47K42T-I/PT is suitable for 6 applications: Industrial Sensor Hub, Consumer Appliance Control Panel, USB HID / User-Interface Peripheral, Cost-Sensitive Automotive Body Module, Low-Power IoT Edge Node, Motor Control and PWM Driver.
Industrial Sensor Hub
The PIC18F47K42T-I/PT is well-matched to multi-sensor industrial hubs because the K42 family integrates a 12-bit ADC2 with up to 35 channels, two rail-to-rail comparators, plus a DMA engine that offloads buffered sensor streams from the CPU. With 128 KB of Flash and 8 KB of SRAM, designers can run a real-time scheduler plus Modbus RTU or IO-Link slave stack without external memory expansion, while the XLP sleep mode holds system current below 1 uA between samples. The 1.8 V to 5.5 V supply range suits both 3.3 V and 5 V industrial backplanes, and the -40 C to +85 C industrial temperature grade covers factory-floor deployment without ceramic-package upgrades.
Recommended
Consumer Appliance Control Panel
In washing-machine and dishwasher HMIs, the PIC18F47K42T-I/PT delivers 64 MIPS throughput that drives capacitive-touch firmware plus triac/relay control PWM on a single chip. The dual rail-to-rail comparators serve zero-cross detection for AC line synchronization, while the 12-bit ADC2 reads thermistor / pressure sensor inputs with built-in averaging. The MAP peripheral re-routes UART/I2C pins during different firmware tasks so the same 36 GPIOs can serve both the display and the inverter interface, eliminating an external analog switch. Drop-in compatibility with the older K22 family lets designers upgrade from 32 KB to 128 KB Flash without PCB changes.
Recommended
USB HID / User-Interface Peripheral
For USB-free user-interface peripherals such as gaming mice, programmable keypads, and remote controls, the PIC18F47K42T-I/PT offers 64 MHz CPU, 8 KB SRAM, and DMA paths that sustain high-rate switch-matrix polling without CPU intervention. The PWM generators support per-key RGB LED dimming through hardware PWM without burning CPU cycles, while the vector-interrupt controller keeps HID report latencies under 1 ms. The XLP sleep current below 1 uA lets battery-powered remotes last months, and the 64-pin PIC18F47J53 sibling adds an on-chip USB stack if HID-over-USB is required.
Recommended
Cost-Sensitive Automotive Body Module
The PIC18F47K42T-I/PT powers body-control modules - lighting, seat, mirror, and interior HVAC nodes - where the 64 MHz core plus 12-bit ADC2 deliver sensor fusion at a price point undercutting 32-bit ARM devices. The K42 DMA and CIPs can run LIN or CAN-Lite gateways on-chip, and vector interrupts schedule the body-COM stack deterministically. Although this part is not AEC-Q100 qualified at the K42 generation, its -40 C to +85 C industrial rating covers most under-hood and cabin environments. The QFN-44 footprint PIC18F46K42T-I/ML variant shrinks the BOM area for in-mirror modules.
Recommended
Low-Power IoT Edge Node
In battery-powered IoT endpoints such as wireless thermostats or environmental monitors, the PIC18F47K42T-I/PT provides the deep-sleep XLP modes where quiescent current drops below 1 uA while preserving RAM, IO, and RTC state. The on-chip ADC2 with hardware averaging performs low-power temperature and battery-voltage reads, and the DMA engine wakes the CPU only when a conversion completes. The 1.8 V minimum supply supports single-cell lithium thionyl chloride cells, and the TQFP-44 footprint enables hand-prototype-friendly sockets for one-off deployments. For LoRa-WAN connectivity the same K42 family at the 48-pin PIC18F47J53I/PT adds the auxiliary peripherals.
Recommended
Motor Control and PWM Driver
The PIC18F47K42T-I/PT's complementary 16-bit PWM generators with hardware dead-band insertion are well suited to FOC motor control, BLDC, and stepper drive loops where deterministic ADC-to-PWM latency matters. The 64 MHz core runs a typical sensorless-FOC loop at 16 kHz with margin, while the DMA engine streams ADC2 readings directly into RAM, leaving the CPU free for the floating-point-free control loop. The integrated rail-to-rail comparators detect over-current events within 100 ns, enabling fast hardware trip-zones without software latency. The K42 family shares peripherals with the K40 family, so applications can be ported when more Flash is required.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F47K42T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F47K42-I/PT | PIC18F47K42-E/PT | PIC18F47K40T-I/PT | PIC18F46K42T-I/PT | PIC18F45K42T-I/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) 10x10 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 128 KB | 32 KB | 128 KB | 32 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 1.5 KB | 8 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 256 B | 1 KB | 1 KB |
| Maximum CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| GPIO Pins | 36 | 36 | 36 | 36 | 36 | 35 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| ADC Resolution | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 10-bit ADC | 12-bit ADC2 | 12-bit ADC2 |
Key Differentiators
- Largest Flash memory in the K42 family at this footprint (vs PIC18F47K40T-I/PT)
- Industrial temperature grade tailored for factory environments (vs PIC18F47K42-E/PT)
- 12-bit ADC2 with hardware oversampling reduces BOM cost (vs PIC18F46K22T-I/PT)
- On-chip DMA engine supports real-time sensor fusion (vs PIC18F45K22T-I/PT)
Design Notes
Place a 100 nF X7R decoupling capacitor within 5 mm of VDD and another identical cap at AVDD (pin 44) for ADC2 reference stability. The PIC18F47K42T-I/PT supports 1.8 V to 5.5 V operation, but when the ADC2 is enabled, power AVDD from a separate LDO trace filtered with a ferrite bead to avoid losing 0.5 LSB accuracy during switching events on VDD. Estimated: if the PCB ground plane is split between analog and digital, expect an extra 1-2 LSB ADC error due to return-current coupling.
The TQFP-44 footprint is 10 mm x 10 mm with 0.8 mm pitch. Use 8 mil trace-and-space routing with via-in-pad only when the inner pad diameter exceeds 0.4 mm; otherwise avoid it because the package leads are tolerance-sensitive. According to Microchip datasheet (DS40002072D), the MCLR pin (pin 33) requires a 10 kohm pull-up to VDD plus 100 nF to VSS to achieve the slow-rise-time reset behavior used during ICSP programming. Estimated: a 4-layer stack-up with continuous ground beneath the chip keeps radiated emissions 6 dB lower than a 2-layer version.
Do not connect the PIC18F47K42T-I/PT to a 5 V source when the firmware configures RA3 as a digital-only GPIO without enabling the alternate analog function RA3 is the Vref+ pin. The ADC2 reference input will pull high into the analog mux and disrupt adjacent channels. According to the Microchip datasheet (DS40002072D), always tie unused GPIO pins to either VDD or VSS - never leave them floating - to keep the XLP sleep current below the 1 uA specification. Pins assigned to analog functions but driven by external voltages exceeding VDD by 200 mV can leak power through the digital input buffer.
For PWM-driven motor loads, keep the PWM traces shorter than 25 mm and route them away from analog inputs to avoid capacitive coupling into the ADC2 result register. The complementary PWM generators include programmable dead-band delays up to 64 ns, which prevents shoot-through in half-bridge drivers. Estimated: a 50 mm PWM trace on a 2-layer board can couple 30 mV p-p into adjacent analog channels, increasing effective ADC2 noise by 1 LSB. Use guarded traces or guard rings around the analog input pins.
Compliance Information
RoHS compliant per Microchip product page. K42 family is industrial-grade (-40 C to +85 C) and is not AEC-Q100 qualified at this generation. The -E/PT variant extends the upper limit to +125 C but is still not AEC-Q100 qualified for automotive.
