PIC18F27Q10T-I/STX - 64MHz 8-bit MCU 128KB Flash | Microchip
MPN: PIC18F27Q10T-I/STX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.78 | $2.78 |
| 10 | $2.55 | $25.50 |
| 100 | $2.31 | $231.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.95 | $1,950.00 |
PIC18F27Q10T-I/STX Overview
An 8-bit microcontroller (MCU) is a single-chip processor that integrates CPU core, program memory (Flash), data memory (SRAM), non-volatile data memory (EEPROM), digital I/O and on-chip peripherals into one package. It belongs to the broader hierarchy of microcontrollers -> embedded processors -> semiconductors. PIC18-family MCUs from Microchip use an enhanced Harvard architecture with a modified RISC core, 16-bit instructions and a rich peripheral set that is friendly to both C and assembly.
Key features include 128 KB self-programmable Flash with device information area (DIA) and unique device ID, 3.5 KB SRAM plus 256 B EEPROM for data logging, 10-bit ADC2 with computation engine for automated Capacitive Voltage Divider (CVD) touch, and Configurable Logic Cells (CLC) for hardware state-machine glue logic. The peripheral pin select (PPS) system remaps digital functions to any I/O pin, simplifying PCB layout. The device runs across 2.3V-5.5V and is rated -40C to +85C industrial.
The architecture combines an enhanced mid-range core with Core Independent Peripherals (CIPs) such as CLC, PWM, CWG and HLT. CIPs execute state-machine logic without CPU intervention, freeing the core for comms, sensor fusion and housekeeping. Integrated 5V operation provides increased noise immunity for industrial and automotive-adjacent environments, and the ADC2 engine offloads averaging, oversampling and threshold compare.
Typical applications include capacitive touch user interfaces, IoT sensor nodes, BLDC/PMSM motor control with CWG and HLT, household appliances, smart energy metering and low-cost industrial control. The 128 KB Flash supports USB and CAN stacks as well as bootloader+application partitioning for field upgradability.
When designing with this part, place a 100 nF decoupling capacitor close to each VDD pin and use PPS routing to keep high-speed signals short. For applications sensitive to noise, the ADC2 + CVD engine eliminates software averaging in many touch and sensor interfaces, reducing firmware complexity.
Drop-in alternatives for PIC18F27Q10T-I/STX — 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 PIC18F27Q10T-I/STX (same form factor and footprint) — differing in ADC, Package, Operating Temperature, Program Memory (Flash), Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F27Q10-I/STX
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View Datasheet →PIC18F26Q43T-I/STX
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View Datasheet →PIC18F25Q43T-I/STX
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View Datasheet →PIC18F24Q10-I/STX
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View Datasheet →PIC18F25Q10-I/STX
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View Datasheet →PIC18F27Q10T-I/STX Maximum Ratings & Electrical Characteristics
| Core | PIC18 enhanced 8-bit |
| Family | PIC18-Q10 |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data SRAM | 3.5 KB |
| Data EEPROM | 256 B |
| Operating Voltage | 2.3 V to 5.5 V |
| ADC | 10-bit ADC2 with Computation (ADC2) |
| DAC | 5-bit DAC |
| Comparators | Yes (on-chip comparators) |
| PWM | Yes (CCP/PWM/CWG) |
| Hardware Limit Timer (HLT) | Yes |
| Package | 28-pin VQFN (4x4 mm) |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| Peripheral Pin Select (PPS) | Yes |
| Configurable Logic Cells (CLC) | Yes |
| RoHS Status | Compliant |
PIC18F27Q10T-I/STX Pin Configuration
| Pin 1 | RA0 — Port A bit 0 / analog / PPS-capable I/O |
| Pin 2 | RA1 — Port A bit 1 / analog / PPS-capable I/O |
| Pin 3 | RA2 — Port A bit 2 / analog / PPS-capable I/O |
| Pin 4 | RA3 — Port A bit 3 / analog / PPS-capable I/O |
| Pin 5 | RA4 — Port A bit 4 / analog / PPS-capable I/O |
| Pin 6 | RA5 — Port A bit 5 / analog / PPS-capable I/O |
| Pin 7 | VDD — Positive supply voltage (2.3V-5.5V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RB0 — Port B bit 0 / analog / PPS-capable I/O |
| Pin 10 | RB1 — Port B bit 1 / analog / PPS-capable I/O |
| Pin 11 | RB2 — Port B bit 2 / analog / PPS-capable I/O |
| Pin 12 | RB3 — Port B bit 3 / analog / PPS-capable I/O |
| Pin 13 | RB4 — Port B bit 4 / analog / PPS-capable I/O |
| Pin 14 | RB5 — Port B bit 5 / analog / PPS-capable I/O |
| Pin 15 | RB6 — Port B bit 6 / ICSPCLK / PPS-capable I/O |
| Pin 16 | RB7 — Port B bit 7 / ICSPDAT / PPS-capable I/O |
| Pin 17 | RC0 — Port C bit 0 / analog / PPS-capable I/O |
| Pin 18 | RC1 — Port C bit 1 / analog / PPS-capable I/O |
| Pin 19 | RC2 — Port C bit 2 / analog / PPS-capable I/O |
| Pin 20 | RC3 — Port C bit 3 / analog / PPS-capable I/O |
| Pin 21 | RC4 — Port C bit 4 / analog / PPS-capable I/O |
| Pin 22 | RC5 — Port C bit 5 / analog / PPS-capable I/O |
| Pin 23 | RC6 — Port C bit 6 / analog / PPS-capable I/O |
| Pin 24 | RC7 — Port C bit 7 / analog / PPS-capable I/O |
| Pin 25 | VDDIO2 — Secondary I/O supply rail (per datasheet) |
| Pin 26 | VSS — Ground reference |
| Pin 27 | RA6 — Port A bit 6 / analog / PPS-capable I/O / OSC2 |
| Pin 28 | RA7 — Port A bit 7 / analog / PPS-capable I/O / OSC1 |
Typical Applications
PIC18F27Q10T-I/STX is suitable for 7 applications: Capacitive Touch User Interface, BLDC / PMSM Motor Control, IoT Sensor Node, Household Appliance Control, Smart Energy Metering, Industrial Sensor & Control Modules, USB HID / Bootloader Host.
Capacitive Touch User Interface
The PIC18F27Q10T-I/STX's integrated 10-bit ADC2 (ADC with Computation) engine with automated Capacitive Voltage Divider (CVD) support makes it ideal for capacitive touch button, slider and wheel implementations. The ADC2 engine performs averaging, oversampling, filtering and threshold comparison in hardware, offloading firmware processing and reducing CPU wake events - critical for battery-powered touch interfaces. With 128 KB Flash, developers can implement mTouch libraries, surface gestures, and proximity sensing in a single chip. The 2.3-5.5V operation and -40C to +85C industrial rating cover appliance, consumer and industrial UI panels.
Recommended
BLDC / PMSM Motor Control
The PIC18F27Q10T-I/STX drives small BLDC and PMSM motors using its integrated CCP/PWM, Complementary Waveform Generator (CWG), and Hardware Limit Timer (HLT). The CWG generates complementary PWM with dead-band insertion, while HLT provides hardware fault shutdown independent of CPU latency - critical for motor overcurrent protection. Combined with the on-chip 5-bit DAC and comparators for current sensing, the device supports sensorless or Hall-sensor FOC loops at moderate speeds. The 64 MHz CPU executes sensor-fusion and PI control at 16 MIPS, suitable for fans, pumps, drone ESCs and appliance motors.
Recommended
IoT Sensor Node
The PIC18F27Q10T-I/STX is suited for IoT sensor nodes combining sensor readout with edge processing. The ADC2 with computation engine reads temperature, humidity, light or strain-gauge sensors while offloading averaging and threshold checks. Configurable Logic Cells (CLC) implement glue logic between sensors and peripherals, and Peripheral Pin Select (PPS) reassigns digital functions to any I/O pin to simplify mixed-signal PCB layout. The 128 KB Flash accommodates TLS/DTLS stacks and over-the-air (OTA) bootloader, while the 256 B EEPROM stores calibration and security keys. XLP low-power modes keep sleep current in the sub-uA range for battery-lifetime sensors.
Recommended
Household Appliance Control
Induction cooktops, washing machines, dishwashers and coffee machines benefit from the PIC18F27Q10T-I/STX's robust 5V operation, industrial temperature range, and CIP-driven peripheral set. CLCs and CWG implement safety interlocks, buzzer/PWM drivers and triac control without CPU intervention, ensuring deterministic fault response. The 128 KB Flash supports IEC 60730 Class B safety library for white goods. The on-chip comparators detect zero-cross for triac dimming, while the 5-bit DAC generates reference levels for liquid-level sensing. The exposed-pad VQFN (STX) package enhances thermal dissipation for high-density appliance boards.
Recommended
Smart Energy Metering
Smart electricity, gas and water meters rely on the PIC18F27Q10T-I/STX's 5V noise immunity, ADC2 precision and Core Independent Peripherals for tamper detection and metrology. The 10-bit ADC2 with computation handles voltage and current sensing with automatic oversampling, while the on-chip comparators implement zero-cross detection for power-quality analysis. The 128 KB Flash fits DLMS/COSEM, M-Bus or Wireless M-Bus protocol stacks, and the 256 B EEPROM stores calibration coefficients and tamper flags. Industrial temperature operation suits outdoor meter installations from -40C to +85C.
Recommended
Industrial Sensor & Control Modules
The PIC18F27Q10T-I/STX targets 24V industrial signal-conditioning, isolated sensor interfaces and discrete-control modules. CLCs implement debouncing, pulse stretching and sequencing glue logic without CPU cycles. The CWG drives isolated gate signals or PWM outputs up to 5V logic swing, and PPS routes UART, SPI and I2C to any pin for layout flexibility. The 128 KB Flash supports Modbus RTU/TCP and CANopen stacks, while Hardware Limit Timer (HLT) provides fail-safe shutdown for overcurrent/voltage events. The industrial temperature rating suits factory-floor deployment.
Recommended
USB HID / Bootloader Host
With 128 KB Flash and the PIC18 enhanced core, the PIC18F27Q10T-I/STX can implement a USB HID bootloader plus user application within a single chip. The Microchip mTouch + USB HID stack fits comfortably in 128 KB, and CLCs/CWG provide status-LED and PWM control independent of USB traffic. Peripheral Pin Select (PPS) simplifies USB D+/D- routing on the VQFN-28 layout. The 2.3-5.5V VBUS range allows direct bus-powered operation. Designers use this for field-upgradable consumer devices, configuration dongles and HID-class accessories.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F27Q10T-I/STX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F27Q10-I/STX | PIC18F27Q10T-I/SS | PIC18F26Q43T-I/STX | PIC18F25Q43T-I/STX | PIC18F24Q10-I/STX | PIC18F25Q10-I/STX |
|---|---|---|---|---|---|---|---|
| Package | 28-VQFN (4x4 mm, STX) | 28-VQFN (4x4 mm, STX) - same | 28-SSOP (5.30 mm) - different land pattern | 28-VQFN (4x4 mm, STX) - same | 28-VQFN (4x4 mm, STX) - same | 28-VQFN (4x4 mm, STX) - same | 28-VQFN (4x4 mm, STX) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Family | PIC18 enhanced / Q10 | PIC18 enhanced / Q10 | PIC18 enhanced / Q10 | PIC18 enhanced / Q43 | PIC18 enhanced / Q43 | PIC18 enhanced / Q10 | PIC18 enhanced / Q10 |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 32 KB (-75%) | 16 KB (-87%) | 32 KB (-75%) |
| SRAM | 3.5 KB | 3.5 KB | 3.5 KB | 4 KB (+14%) | 4 KB (+14%) | 1 KB (-71%) | 2 KB (-43%) |
| ADC | 10-bit ADC2 (CVD) | 10-bit ADC2 (CVD) | 10-bit ADC2 (CVD) | 12-bit ADC2 (upgraded) | 12-bit ADC2 (upgraded) | 10-bit ADC2 (CVD) | 10-bit ADC2 (CVD) |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Temperature Range | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
Key Differentiators
- 128 KB Flash in 28-pin VQFN (STX) (vs PIC18F26Q43T-I/STX)
- ADC2 CVD automation (vs PIC18F25K50T-I/SO)
- Hardware Limit Timer (HLT) for fail-safe motor control (vs PIC18F24Q10-I/STX)
- Same VQFN-28 footprint as newer Q43 family (vs PIC18F27K42-I/ML (QFN-28 6x6 mm))
Design Notes
Place a 100 nF X7R decoupling capacitor within 3 mm of every VDD/VDDIO2 pin and a bulk 10 uF X5R capacitor on the main 5V rail. The PIC18F27Q10T-I/STX draws low nano-ampere sleep currents in XLP modes, so size the bulk capacitor to ride through deep-sleep wake events on capacitive-touch sensor scans. Tie the exposed thermal pad (EP) of the VQFN-28 (STX) to a continuous ground pour with at least 8 thermal vias to the inner ground plane for thermal and electrical performance.
Do not exceed 5.5V on any VDD or digital I/O pin - the on-chip ESD clamps and ADC reference are not 5V-tolerant above this. The ADC2 CVD engine requires the CVD shield drive enabled on adjacent I/O pins to suppress moisture sensitivity. When migrating to the Q43 family (PIC18F26Q43T-I/STX), recompile firmware - the Q43 SFR map, register names and CIP configuration differ from Q10 even though the packages and pin counts are identical.
Use Peripheral Pin Select (PPS) to remap UART, SPI, I2C and PWM to any digital-capable I/O pin, freeing the board from rigid pin assignments. Keep ADC traces short and surround them with a ground guard ring to minimize digital switching noise coupling into capacitive-touch measurements. Route the ICSPDAT/ICSPCLK lines (RB6/RB7) to a 0.1 inch header with no series resistors, as required by the Microchip debug header specification for MPLAB ICD and PICKit programmers.
Estimated: at 64 MHz CPU clock, trace lengths above ~50 mm on PPS-routed high-speed signals can introduce >2 ns skew - use impedance-controlled routing (50 ohm single-ended) and series damping resistors of 22-33 ohm at the source for SPI/CCP outputs longer than 25 mm. For ADC2 capacitive touch scans, group the touch electrodes on adjacent pins to share a common ground-referenced shield trace that the CWG can drive.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial -40C to +85C temperature grade ('I' suffix). Not AEC-Q100 qualified - choose PIC18F27Q10-E/STX or AEC-Q100 Q10 variants for automotive if available.
