PIC18F06Q40T-I/ST - 8-Bit MCU, 64KB Flash, 64MHz, 14-TSSOP | Microchip
MPN: PIC18F06Q40T-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.31 | $13.10 |
| 100 | $1.18 | $118.00 |
| 500 | $1.06 | $530.00 |
| 1,000 | $0.94 | $940.00 |
PIC18F06Q40T-I/ST Overview
An 8-bit microcontroller (MCU) is a compact, single-chip computer built around an 8-bit data path. It belongs to the microcontroller family, itself a subcategory of microprocessors and embedded computing. 8-bit MCUs such as the PIC18 series remain widely deployed in cost-sensitive, deterministic control applications where predictable interrupt latency, low power, and ease of use outweigh the throughput of 32-bit devices. The PIC18 line specifically extends Microchip's legacy PIC16 architecture with a larger 16-bit instruction word, linear memory model, hardware multiplier, and C-friendly compiler support, occupying a tier between simple PIC16 parts and high-end dsPIC/PIC32 devices.
Key features of the PIC18F06Q40 include a 12-bit ADC with Computation (ADC2) for automated averaging, threshold detection and oversampling, two 8-bit DAC outputs, a 16-bit PWM module, DMA, Peripheral Pin Select (PPS) for flexible signal routing, and standard serial interfaces (UART, SPI, I2C). The integrated 12-bit ADC2 with up to 12 channels reduces external signal-conditioning parts, while PPS allows designers to remap digital peripherals to almost any I/O pin, easing PCB layout.
The device targets real-time control and sensor-interface designs: motor and lighting control loops, IoT end nodes, white-goods HMIs, battery-powered sensor hubs, and industrial sensor-conditioning front ends. Designers migrating from smaller PIC16F or PIC18F/K parts can move to the Q40 family to gain ADC2 automation, DMA, and PPS without changing toolchains, since the part is supported by MPLAB X IDE, XC8 compilers, and the MPLAB Code Configurator (MCC).
For new designs, place a 100nF decoupling capacitor close to VDD, respect the 1.8V to 5.5V supply range, and configure unused pins as outputs low to minimize current draw. The TSSOP-14 footprint allows hand-soldering-friendly prototypes but also supports standard reflow profiles for volume assembly.
This page consolidates distributor pricing, package-level drop-in alternatives, and design notes that go beyond what the manufacturer datasheet alone provides, helping engineers compare, qualify, and source the part efficiently.
Drop-in alternatives for PIC18F06Q40T-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 PIC18F06Q40T-I/ST (same form factor and footprint) — differing in Package, ADC, DAC, PWM, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F06Q40T-I/SL
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC18F06Q40-I/ST
✅ Drop-In✓ In Stock
$0.84 / Unit
View Datasheet →PIC18F06Q40-E/ST
✅ Drop-In✓ In Stock
$0.81 / Unit
View Datasheet →PIC18F05Q40T-I/ST
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC18F05Q40T-I/SL
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC18F04Q40-I/ST
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC18F06Q40T-I/ST Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit |
| Program Memory (Flash) | 64 KB (64K x 8) |
| RAM | 4 KB |
| EEPROM | 512 bytes |
| Maximum CPU Frequency | 64 MHz |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| ADC | 12-bit ADC2 with Computation |
| DAC | 2 x 8-bit DAC |
| PWM | 16-bit PWM |
| DMA | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Serial Interfaces | UART, SPI, I2C |
| Package | 14-TSSOP |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F06Q40T-I/ST Pin Configuration
| Pin 1 | RA5 — Port A bit 5 (I/O, analog input, PPS-mappable) |
| Pin 2 | RA4 — Port A bit 4 (I/O, analog input, PPS-mappable) |
| Pin 3 | RA3 — Port A bit 3 (I/O, analog input, PPS-mappable) |
| Pin 4 | RA2 — Port A bit 2 (I/O, analog input, PPS-mappable) |
| Pin 5 | RA1 — Port A bit 1 (I/O, analog input, PPS-mappable) |
| Pin 6 | RA0 — Port A bit 0 (I/O, analog input, PPS-mappable) |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7 — Port A bit 7 (I/O, OSC1, PPS-mappable) |
| Pin 9 | RA6 — Port A bit 6 (I/O, OSC2, PPS-mappable) |
| Pin 10 | RC0 — Port C bit 0 (I/O, PPS-mappable) |
| Pin 11 | RC1 — Port C bit 1 (I/O, PPS-mappable) |
| Pin 12 | RC2 — Port C bit 2 (I/O, PPS-mappable) |
| Pin 13 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 14 | VSS — Ground reference |
Typical Applications
PIC18F06Q40T-I/ST is suitable for 6 applications: Sensor Interface and Data Acquisition, Motor Control and Lighting Control, IoT End Node and Home Appliance, Industrial Sensor Conditioning and Front End, Battery-Powered Wearable and Personal Medical, Automotive Body and Comfort Electronics.
Sensor Interface and Data Acquisition
The PIC18F06Q40T-I/ST is purpose-built for sensor interface designs thanks to its 12-bit ADC2 with Computation, two 8-bit DAC outputs, and PPS for flexible analog routing. ADC2's automated averaging, threshold detection, and oversampling offload signal-conditioning math from the CPU, letting firmware focus on calibration and communication. With 64KB of Flash, designers can implement sensor-linearization libraries, look-up tables, and small protocol stacks for thermocouples, strain gauges, RTDs, and gas sensors without external DSP. Power consumption is minimized by the 1.8V to 5.5V supply range, allowing direct connection to 2xAA cells or 3.3V regulated rails in battery-powered sensor hubs. Compared with a 32-bit Cortex-M0+ MCU, the PIC18 core's deterministic GPIO toggling is faster for time-critical sensor reads.
Recommended
Motor Control and Lighting Control
The PIC18F06Q40T-I/ST's 16-bit PWM, 64MHz CPU, and DMA enable closed-loop brushed DC, BLDC, and stepper motor control as well as dimmable LED lighting. Six hardware PWM channels support complementary drive and dead-band insertion common in half-bridge drivers, while DMA offloads repetitive peripheral updates so the CPU can run the speed/torque control loop. The two 8-bit DACs can generate reference voltages for current-sense amplifiers, simplifying analog front ends. At a unit price near USD 1.42 at qty 1 and TSSOP-14 hand-solderable footprint, the part is well-suited to consumer appliance motor control where BOM cost dominates. Migration from PIC16F to PIC18F06Q40 is straightforward thanks to shared peripherals and toolchain support.
Recommended
IoT End Node and Home Appliance
The PIC18F06Q40T-I/ST delivers the deterministic performance, low power, and small footprint required for IoT end nodes and home appliances. Its 1.8V to 5.5V operating range enables direct battery or USB-powered operation, while the 64KB Flash and 4KB SRAM accommodate BLE/MQTT/Modbus stacks or simple RTOS kernels. PPS allows UART/SPI/I2C pins to be reassigned on the fly, simplifying PCB layout when board space is tight. Industrial temperature grade (-40C to +85C) ensures reliability in white-goods HMIs, smart thermostats, and connected sensor nodes deployed in uncontrolled environments. Combined with Microchip's MPLAB Code Configurator, firmware development is accelerated via auto-generated peripheral drivers and state-machine frameworks.
Recommended
Industrial Sensor Conditioning and Front End
In industrial 4-20 mA loop-powered transmitters and PLC analog input modules, the PIC18F06Q40T-I/ST serves as a low-cost local controller handling ADC2 conversion, linearization, and HART or Modbus RTU communication. ADC2 with Computation performs on-chip averaging and threshold detection without burdening the CPU, while 512 bytes of EEPROM stores calibration constants and device IDs over the part's lifetime. The 14-TSSOP package fits densely populated analog front-end PCBs. Industrial temperature range and PPS flexibility enable robust designs that meet factory-automation EMC requirements.
Recommended
Battery-Powered Wearable and Personal Medical
Low-power wearable health monitors benefit from the PIC18F06Q40T-I/ST's wide 1.8V to 5.5V supply range, integrated 12-bit ADC2 for biosensor reads, and small TSSOP-14 footprint. Firmware can use Sleep and Idle modes between sensor reads while ADC2's automated oversampling reduces CPU wake time. The two 8-bit DACs drive reference voltages for bio-impedance measurements. RoHS compliance and the -40C to +85C industrial range simplify regulatory paths for personal medical and fitness devices where BOM cost and predictable behavior are critical.
Recommended
Automotive Body and Comfort Electronics
For non-safety automotive body and comfort applications - interior lighting, seat controllers, mirror adjusters, climate-control HMI panels - the PIC18F06Q40T-I/ST's deterministic 8-bit core, 16-bit PWM for LED dimming, and CAN-friendly peripherals offer a robust solution. While the -I/ST variant is industrial-grade (-40C to +85C), Microchip offers the /Q40 family with extended-temperature options for under-dash environments. Designers can leverage the same firmware across consumer and industrial SKUs thanks to register-level compatibility within the PIC18F06Q40 family, reducing qualification cost and time-to-market for vehicle accessory modules.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F06Q40T-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F06Q40T-I/SL | PIC18F06Q40-I/ST | PIC18F06Q40-E/ST | PIC18F05Q40T-I/ST | PIC18F05Q40T-I/SL | PIC18F04Q40-I/ST |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-SOIC | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-SOIC | 14-TSSOP - same |
| Core | PIC18 8-bit | PIC18 8-bit - same | PIC18 8-bit - same | PIC18 8-bit - same | PIC18 8-bit - same | PIC18 8-bit - same | PIC18 8-bit - same |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Flash | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 32 KB (-50%) | 16 KB (-75%) |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 512 B (-87%) |
| Supply 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 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Higher Flash density within the same PIC18F06Q40 family (vs PIC18F05Q40T-I/ST)
- TSSOP-14 footprint for slim designs (vs PIC18F06Q40T-I/SL)
- Industrial temperature grade option with same die (vs PIC18F06Q40-E/ST)
Design Notes
Place a 100 nF decoupling capacitor as close as physically possible to each VDD pin (pin 13 on TSSOP-14), with a second 10 uF bulk capacitor near the MCU supply trace. The PIC18F06Q40T-I/ST's ADC2 draws brief inrush currents during conversions; placing a small ceramic (X7R, 100 nF) within 3 mm of the VDD pin minimizes supply noise that could otherwise couple into analog reads. For battery-powered designs using the 1.8V minimum supply, validate brown-out reset (BOR) behavior under actual load transients.
The 14-TSSOP footprint has a 0.65 mm pitch and 6.4 mm body width. Route all signals on the top layer with continuous ground pour on layer 2, keeping analog traces away from PWM and digital switching lines. Use a single ground island (no splits) under the MCU to provide a low-impedance return path for ADC2 conversions. When using PPS to remap peripherals, keep analog pins on Port A to minimize digital switching noise coupling into ADC readings. Leave test points on VDD, VSS, and the programming/debug pins (PGED/PGEC) for in-circuit programming.
Do not exceed the absolute maximum VDD of 5.5V; even brief transients above this can damage the MCU. When migrating firmware from a PIC18F05Q40 design, do not assume Flash size - rebuild the project and verify the link map fits within the target's memory. PPS configuration must be performed before peripheral enable, otherwise peripheral outputs will not appear on the expected pins. Finally, configure unused I/O as outputs low (not inputs) to minimize current draw in Sleep mode.
Compliance Information
RoHS and lead-free per Microchip product page. Halogen-free status not explicitly stated in verified data. Not AEC-Q100 qualified - choose PIC18F06Q40 automotive grade variant for vehicle applications.
