PIC18F06Q41T-I/ST - 8-bit 64MHz MCU 64KB Flash | Microchip
MPN: PIC18F06Q41T-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.12 | $112.00 |
| 500 | $0.97 | $485.00 |
| 1,000 | $0.84 | $840.00 |
PIC18F06Q41T-I/ST Overview
An 8-bit microcontroller (MCU) is a microprocessor integrated with program memory, RAM, peripherals, and I/O on a single silicon die, using an 8-bit data path. Within the broader taxonomy, this PIC18 sits under microcontroller -> embedded controller -> digital IC -> semiconductor. The 8-bit class excels in deterministic real-time control, low power consumption, and low cost per unit, making it the preferred choice for appliance controls, sensor hubs, and human-interface designs where 32-bit performance is unnecessary.
Key features include 64KB self-programmable Flash with 256-byte block erase, 4KB linear SRAM, 512 bytes EEPROM emulation, a 12-bit ADCC with up to 12 channels, two 8-bit DACs with rail-to-rail output, an integrated 5MHz op-amp, six 16-bit timers, DMA controller for peripheral-to-memory transfers, and three DMA channels. Communication peripherals include UART, SPI, and I2C, all routed via PPS to most I/O pins.
The PIC18-Q41 architecture uses a modified Harvard structure with a 16-bit instruction word and an 8-bit data path, executed through a 2-stage pipeline. The on-chip op-amp enables single-supply signal conditioning without external analog ICs, while the ADCC supports hardware-averaged oversampling and threshold comparisons that offload CPU cycles. PPS allows remapping of digital peripherals to nearly any I/O, simplifying PCB layout.
Typical applications include capacitive touch sensing using CVD, low-power sensor nodes, LED lighting controls with 16-bit PWM dimming, and small appliance controls such as coffee makers and fans. With the integrated op-amp, the device can directly interface with analog sensors, including thermistors and photodiodes, eliminating external signal-conditioning stages.
When designing with this MCU, ensure VDDCORE decoupling (100nF plus 1uF) is placed within 2mm of the pin, route MCLR with a 10k pull-up, and use PPS to optimize PCB routing. For low-power operation, take advantage of the Sleep mode with peripheral wake-on-touch.
This page synthesizes verified distributor pricing, drop-in alternative cross-references, and practical design notes that complement the manufacturer datasheet.
Drop-in alternatives for PIC18F06Q41T-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 PIC18F06Q41T-I/ST (same form factor and footprint) — differing in Package, ADC, DAC, Program Memory (Flash), Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F06Q41-I/ST
✅ Drop-In✓ In Stock
$1.12 / Unit
View Datasheet →PIC18F06Q41-E/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F05Q41T-I/ST
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC18F06Q40T-I/ST
✅ Drop-In✓ In Stock
$0.94 / Unit
View Datasheet →PIC18F05Q41T-I/SL
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC18F05Q41T-I/ST
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.74 / Unit
View Datasheet →PIC18F06Q41T-I/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit) |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 64 KB |
| SRAM | 4 KB |
| EEPROM | 512 bytes |
| ADC | 12-bit ADCC with up to 12 channels, hardware CVD, averaging, oversampling, threshold compare |
| DAC | 2 x 8-bit DAC (rail-to-rail) |
| Operational Amplifier | 1 x on-chip 5 MHz op-amp |
| PWM | 16-bit PWM |
| Timers | 6 x 16-bit timers |
| DMA | 3 channels |
| Communication Interfaces | UART, SPI, I2C (via PPS) |
| Peripheral Pin Select (PPS) | Yes |
| Package | 14-pin TSSOP |
| Operating Voltage | 1.8 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | 1 |
PIC18F06Q41T-I/ST Pin Configuration
| Pin 1 | RA0/ICDDAT — GPIO RA0 / ICD Data |
| Pin 2 | RA1 — GPIO RA1 |
| Pin 3 | RA2 — GPIO RA2 |
| Pin 4 | RA3/MCLR/VPP — GPIO RA3 / Master Clear / Programming voltage |
| Pin 5 | RA4 — GPIO RA4 |
| Pin 6 | RA5 — GPIO RA5 |
| Pin 7 | RA6 — GPIO RA6 |
| Pin 8 | VSS — Ground |
| Pin 9 | VDD — Positive supply voltage |
| Pin 10 | RB4 — GPIO RB4 |
| Pin 11 | RB5 — GPIO RB5 |
| Pin 12 | RB6/ICSPCLK — GPIO RB6 / ICSP Clock |
| Pin 13 | RB7/ICSPDAT — GPIO RB7 / ICSP Data |
| Pin 14 | RA7 — GPIO RA7 |
Typical Applications
PIC18F06Q41T-I/ST is suitable for 6 applications: Capacitive Touch Sensing Panels, Battery-Powered IoT Sensor Nodes, LED Lighting and PWM Dimming Controls, Small Appliance Motor and Fan Controls, Industrial Sensor Signal Conditioning, Wearable Health and Fitness Devices.
Capacitive Touch Sensing Panels
The PIC18F06Q41T-I/ST is purpose-built for capacitive touch user interfaces through its 12-bit ADCC with hardware Capacitive Voltage Divider (CVD) sequencing. CVD automates charge-and-acquire cycles across multiple pins without CPU intervention, enabling up to 12 touch buttons on the 14-pin TSSOP footprint. With 64 KB Flash for the Microchip MPLAB Touch library, 4 KB SRAM for capacitive averaging buffers, and 16-bit PWM for LED backlight control, a single MCU replaces dedicated touch ICs plus an LED driver. Compared to a software-only CVD implementation, the ADCC hardware offload reduces CPU utilization below 10% even with 8 buttons scanned at 100 Hz.
Recommended
Battery-Powered IoT Sensor Nodes
The PIC18F06Q41T-I/ST's 1.8-5.5 V supply range, sub-1uA Sleep current, and integrated analog peripherals make it ideal for coin-cell or 2xAA-powered IoT endpoints. The 12-bit ADCC with oversampling reads thermistors, photocells, and gas sensors directly, while the on-chip op-amp conditions bridge sensors without external amplifiers. Sleep wake-on-touch via ADCC CVD eliminates the need for a separate wake controller. At 64 MHz active and <1 uA sleep, the MCU supports years of battery life on a CR2032 cell at 1 sample-per-minute duty cycle.
Recommended
LED Lighting and PWM Dimming Controls
With a hardware 16-bit PWM, dual 8-bit DACs, and PPS, the PIC18F06Q41T-I/ST drives multi-channel LED lighting with smooth logarithmic dimming curves. The 16-bit PWM resolution (0.0015% per step) eliminates visible flicker in RGB color-mixing and warm-dim fixtures, while the dual DACs generate reference voltages for constant-current LED driver ICs. DMA moves PWM update values directly to the duty-cycle register, freeing the CPU for ambient-light sensing loops via the ADCC. The 14-pin TSSOP fits within LED MR16, downlight, and strip-controller form factors.
Recommended
Small Appliance Motor and Fan Controls
The PIC18F06Q41T-I/ST is a strong fit for closed-loop BLDC and brushed DC motor control in small appliances such as fans, blenders, and coffee machines. The 16-bit PWM drives MOSFET gate drivers through PPS-routable pins, while the on-chip op-amp reads back-EMF or shunt current for speed regulation. The 64 MHz core executes sensorless FOC at sufficient rates for sub-100W motors, and the ADCC samples motor current synchronously to PWM edges via hardware trigger. Hardware CVD handles capacitive user-interface buttons for sealed front-panel designs.
Recommended
Industrial Sensor Signal Conditioning
The integrated 5 MHz op-amp eliminates the need for a separate analog front-end IC in 4-20 mA loop-powered industrial sensors. Combined with the 12-bit ADCC, dual DACs, and UART/SPI/I2C via PPS, the PIC18F06Q41T-I/ST interfaces directly to HART modems, IO-Link transceivers, and RS-485 PHYs from a single TSSOP-14 footprint. Wide 1.8-5.5 V supply tolerance handles 24V loop-powered industrial rails after external regulation. The 64 KB Flash accommodates IO-Link stack and device description libraries.
Recommended
Wearable Health and Fitness Devices
The PIC18F06Q41T-I/ST's ultra-low sleep current (<1uA) and integrated analog peripherals suit wearable fitness bands measuring heart rate, SpO2, and skin temperature. The 12-bit ADCC with hardware averaging drives photoplethysmography (PPG) LED pulses and synchronous photodiode sampling, while the op-amp amplifies the small photodiode currents. The 16-bit PWM drives LED brightness, and DMA moves sample buffers directly to memory for FFT analysis. The 14-pin TSSOP fits wristband form factors; Sleep wake-on-touch enables button-free user interaction.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F06Q41T-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F06Q41-I/ST | PIC18F06Q41-E/ST | PIC18F05Q41T-I/ST | PIC18F06Q40T-I/ST | PIC18F05Q41T-I/SL | PIC18F05Q41T-I/ST |
|---|---|---|---|---|---|---|---|
| Package | 14-TSSOP | 14-TSSOP (same) | 14-TSSOP (same) | 14-TSSOP (same) | 14-TSSOP (same) | 14-SOIC (different footprint) | 14-TSSOP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 32 KB (-50%) | 32 KB (-50%) | 32 KB (-50%) |
| SRAM | 4 KB | 4 KB | 4 KB | 2 KB (-50%) | 2 KB (-50%) | 2 KB (-50%) | 2 KB (-50%) |
| Integrated Op-Amp | Yes (5 MHz) | Yes | Yes | Yes | No | Yes | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
Key Differentiators
- Integrated 5 MHz op-amp eliminates external analog front-end (vs PIC18F06Q40T-I/ST)
- Higher memory capacity with same TSSOP-14 footprint (vs PIC18F05Q41T-I/ST)
- Hardware CVD automates capacitive touch sequencing (vs Generic PIC18F MCU)
Design Notes
Place a 100 nF decoupling capacitor within 2 mm of the VDD pin (Pin 9) and a bulk 1 uF-10 uF capacitor near the IC. The PIC18F06Q41T-I/ST has an internal voltage regulator for the core; add a 100 nF on VDDCORE if the layout is split. In Sleep mode, current drops below 1 uA at 3 V - verify that no peripheral sources leakage through I/O pull-ups during deep sleep. For coin-cell applications, use Sleep with periodic ADCC wake rather than continuous ADC conversion to maximize battery life.
Route the MCLR pin (Pin 4) with a 10 kohm pull-up to VDD and a 100 nF capacitor to ground if ICSP programming is required. For 14-TSSOP packages, the 0.65 mm pitch demands 0.15 mm trace width with 0.15 mm spacing; ensure the PCB fabricator supports 0.1 mm drill for vias. Place the ICSP header on the board edge to support field firmware updates. Keep analog (ADC, op-amp) traces short and away from PWM/digital switching lines to avoid capacitive coupling noise.
Do not exceed 5.5 V on any I/O pin - the PIC18F06Q41T-I/ST is NOT 5V tolerant on RA3/MCLR in some configurations. Configure unused I/O as outputs driving low or as inputs with internal weak pull-ups enabled to minimize Sleep current. When using PPS, note that one peripheral output may be remapped to multiple pins, but a pin can host only one peripheral at a time. PPS unlock sequence is required in code - forgetting this leaves PPS disabled. Always verify the ADCC acquisition time matches source impedance - high-impedance sensors need an external buffer or use the integrated op-amp follower.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial grade -40C to +85C; not AEC-Q100 qualified. Lead-free and halogen-free per Microchip environmental compliance documentation.
