PIC18F05Q41-I/ST - 8-Bit 64MHz MCU, 32KB Flash | Microchip TSSOP-14
MPN: PIC18F05Q41-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.8 | $0.80 |
| 10 | $0.74 | $7.40 |
| 100 | $0.66 | $66.00 |
| 500 | $0.58 | $290.00 |
| 1,000 | $0.51 | $510.00 |
PIC18F05Q41-I/ST Overview
An 8-bit microcontroller (MCU) is a single-chip processor with an 8-bit data path, on-chip Flash program memory, SRAM, EEPROM, and integrated peripherals. The PIC18 family sits within Microchip's PIC microcontroller hierarchy (PIC16 -> PIC18 -> dsPIC), offering higher performance, more memory, and richer peripherals than baseline PIC16 while remaining simpler than 16-bit dsPIC devices. The 'Q41' sub-family emphasizes advanced analog integration for sensor and signal-chain applications.
Key features of the PIC18F05Q41-I/ST include a 64MHz internal oscillator, 12-bit ADC with computation (ADC2), 8-bit DAC, on-chip operational amplifiers, 16-bit PWM with complementary outputs, and Configurable Logic Cells (CLC). DMA support offloads data movement between peripherals and memory, while the Core Independent Peripherals (CIPs) enable deterministic real-time responses without CPU intervention. These features reduce external component count for sensor conditioning and motor-control loops.
Architecturally, the device uses Microchip's enhanced 8-bit RISC core with a hardware multiplier, single-cycle multiplication support, and a 16-bit instruction path for improved code density. The advanced analog block includes zero-cross detection, slope compensation, and dedicated op-amps with rail-to-rail inputs, enabling direct interfacing with current shunts, thermistors, and bridge sensors without external signal conditioning.
Typical applications include IoT sensor nodes, consumer appliance control, low-end BLDC motor drives, LED lighting controllers, battery management front-ends, and HVAC sensor hubs. The combination of small TSSOP-14 footprint and integrated analog suits space-constrained designs.
When designing with this device, pay attention to the pin-limited 14-TSSOP package: careful pin assignment is critical because the same pins are multiplexed across ADC, PWM, and communication functions. Always verify the pin mux in MPLAB X IDE before committing the PCB layout.
This page synthesizes distributor pricing, drop-in PIC18 alternates, and practical design notes that go beyond the manufacturer datasheet summary.
Drop-in alternatives for PIC18F05Q41-I/ST — 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 PIC18F05Q41-I/ST (same form factor and footprint) — differing in ADC, Package, Operating Temperature, DAC, PWM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F05Q41-E/ST
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →PIC18F05Q40T-I/ST
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC18F05Q40-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F05Q40-E/ST
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →PIC18F04Q41-E/SL
✅ Drop-In✓ In Stock
$0.79 / Unit
View Datasheet →PIC18F04Q40-I/ST
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC18F05Q41-I/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC |
| Core Size | 8-bit |
| Maximum CPU Speed | 64 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| RAM | 2 KB |
| EEPROM | 512 bytes |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 12-bit ADC2 |
| DAC | 8-bit DAC |
| PWM | 16-bit PWM |
| On-chip Op-Amps | Yes |
| Connectivity | I2C, SPI, UART |
| Package | TSSOP-14 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| DMA | Yes |
| Lead-Free / RoHS | Yes / Compliant |
PIC18F05Q41-I/ST Pin Configuration
| Pin 1 | RA5 — I/O port A bit 5 / analog / ICSPCLK |
| Pin 2 | RA4 — I/O port A bit 4 / analog |
| Pin 3 | RA3 — I/O port A bit 3 / analog / MCLR |
| Pin 4 | RA2 — I/O port A bit 2 / analog / DAC output |
| Pin 5 | RA1 — I/O port A bit 1 / analog / OPA1IN+ |
| Pin 6 | RA0 — I/O port A bit 0 / analog / ICSPDAT |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RC5 — I/O port C bit 5 / PWM / CCP |
| Pin 9 | RC4 — I/O port C bit 4 / PWM |
| Pin 10 | RC3 — I/O port C bit 3 / SCL/I2C |
| Pin 11 | RC2 — I/O port C bit 2 / SDA/I2C |
| Pin 12 | RC1 — I/O port C bit 1 / PWM / CCP |
| Pin 13 | RC0 — I/O port C bit 0 / PWM / CCP |
| Pin 14 | VDD — Positive supply input 1.8V to 5.5V |
Typical Applications
PIC18F05Q41-I/ST is suitable for 6 applications: IoT Sensor Node, Consumer Appliance Control, LED Lighting Controller, Battery Management Front-End, HVAC Sensor Hub, Low-End BLDC Motor Drive.
IoT Sensor Node
The PIC18F05Q41-I/ST fits IoT sensor node designs because its 64 MHz CPU and 12-bit ADC2 with computation support direct sensor readout and on-chip signal processing. With 32 KB Flash it accommodates BLE/Zigbee stack libraries plus application code, while 1.8-5.5V operation allows single-cell Li-ion or 3.3V system power. The integrated op-amps condition bridge sensors or thermistors without external analog front-ends, shrinking BOM for battery-powered IoT endpoints.
Recommended
Consumer Appliance Control
The PIC18F05Q41-I/ST serves consumer appliance control boards where its 16-bit PWM with complementary outputs drives MOSFET half-bridges for motor or heating element control. The 8-bit DAC and 12-bit ADC2 handle set-point reference and feedback sensing in one chip. Core Independent Peripherals (CIPs) execute protection and timing logic without CPU load, improving response time and reliability in washing machines, dishwashers, and small kitchen appliances.
Recommended
LED Lighting Controller
The PIC18F05Q41-I/ST operates as an LED lighting controller where its 16-bit PWM enables smooth dimming with high color-mixing resolution. The integrated op-amps condition current-sense signals from high-side shunts, while DMA offloads PWM updates for flicker-free operation. Operating from 1.8-5.5V allows direct Li-ion battery drive in portable luminaires and architectural fixtures.
Recommended
Battery Management Front-End
The PIC18F05Q41-I/ST fits battery management front-ends where its 12-bit ADC2 monitors cell voltage and current with on-chip computation for Coulomb counting. The on-chip op-amps amplify shunt-resistor signals directly, eliminating external instrumentation amplifiers. Wide 1.8-5.5V supply and 32 KB Flash support state-of-charge algorithms plus safety state machines for portable battery packs.
Recommended
HVAC Sensor Hub
The PIC18F05Q41-I/ST serves HVAC sensor hubs combining temperature, humidity, and pressure sensing. Its ADC2 with computation handles multiple analog channels with hardware-averaged readings, while CLCs combine sensor signals without CPU wakeup. The industrial -40C to +85C temperature range and TSSOP-14 small footprint suit duct-mounted and wall-thermostat installations with strict space constraints.
Recommended
Low-End BLDC Motor Drive
The PIC18F05Q41-I/ST controls low-end BLDC motor drives where its 16-bit PWM with complementary outputs and dead-band generation drives 3-phase MOSFET bridges directly. Zero-cross detection and slope compensation peripherals simplify sensorless back-EMF commutation algorithms. The 64 MHz CPU and DMA keep control loops tight, while 32 KB Flash fits sensorless FOC or trapezoidal commutation firmware for fans, pumps, and small appliances.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F05Q41-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F05Q41-E/ST | PIC18F05Q40T-I/ST | PIC18F05Q40-I/ST | PIC18F05Q40-E/ST | PIC18F04Q41-E/SL | PIC18F04Q40-I/ST |
|---|---|---|---|---|---|---|---|
| Package | TSSOP-14 | TSSOP-14 | TSSOP-14 | TSSOP-14 | TSSOP-14 | TSSOP-14 | TSSOP-14 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC18 8-bit 64MHz | PIC18 8-bit 64MHz | PIC18 8-bit 64MHz | PIC18 8-bit 64MHz | PIC18 8-bit 64MHz | PIC18 8-bit 64MHz | PIC18 8-bit 64MHz |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Temperature Grade | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) |
| ADC | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 | 12-bit ADC2 |
| PWM | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
Key Differentiators
- Integrated on-chip op-amps and 12-bit ADC2 with computation (vs PIC18F05Q40-I/ST)
- 32 KB Flash for application headroom (vs PIC18F04Q41-E/SL)
- Industrial temperature grade is the standard SKU (vs PIC18F05Q41-E/ST)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 14) and a bulk 10 uF tantalum or ceramic capacitor near the supply rail. The PIC18F05Q41-I/ST operates from 1.8 V to 5.5 V; ensure the rail stays above 1.8 V even during transient dips from PWM loads, or the Brown-Out Reset (BOR) may trigger unexpectedly. Use the ADC's dedicated AVSS pin pair when precision analog is required.
The TSSOP-14 package has a 0.65 mm pitch and ~1.0 mm body width; use 0.4 mm signal traces and 0.2 mm spacing to maintain manufacturability. Keep analog traces (RA0-RA5 used as ADC inputs) routed away from PWM switching lines (RC0-RC5) to minimize digital switching noise coupling into ADC readings. The exposed thermal pad is not present on TSSOP-14; thermal dissipation is sufficient up to industrial temperature range without copper pours.
Do not leave the MCLR pin (shared with RA3) floating; tie it to VDD through a 10 kohm resistor or disable MCLR in configuration bits to use RA3 as a regular I/O. The ICSPDAT/ICSPCLK pins (RA0/RA1) must be accessible for in-circuit programming; do not place series resistors greater than 4.7 kohm on these lines or programming will fail. Verify pin-mux assignments in MPLAB X IDE before PCB fabrication because pin function mapping varies with peripheral configuration.
For SPI communication above 4 MHz, keep trace lengths under 25 mm and add 22-33 ohm series termination at the driver output to reduce ringing. The I2C pins (RC3/SCL, RC2/SDA) require external pull-up resistors; choose values between 1 kohm (5V fast-mode) and 10 kohm (3.3V standard-mode) according to bus capacitance. Enable slew-rate control via configuration bits when long cable runs are expected.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature grade only; for automotive AEC-Q100, check Q41 automotive variants.
