PIC18F27Q10-I/STX - 8-Bit 64MHz 128KB Flash MCU | Microchip
MPN: PIC18F27Q10-I/STX ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.62 | $26.20 |
| 100 | $2.4 | $240.00 |
| 500 | $2.18 | $1,090.00 |
| 1,000 | $1.96 | $1,960.00 |
| 3,000 | $1.74 | $5,220.00 |
PIC18F27Q10-I/STX Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program storage, SRAM for data, EEPROM for non-volatile data), and programmable peripherals into one IC. PIC18 microcontrollers are 8-bit Harvard-architecture MCUs from Microchip that combine high computational performance at an economical price point with extensive peripheral integration, including timers, communication interfaces (UART, SPI, I2C), and analog-to-digital converters. The Q10 family specifically extends the PIC18 line with intelligent analog (zero-cross detect, op amps, DACs), configurable logic cells, and 5V operation for improved noise immunity in industrial sensor-node designs.
Key differentiating features include the integrated CLCs that let designers create custom hardware-based logic functions without external glue logic, the 5V-tolerant I/O for direct interface with industrial sensors, and the intelligent analog peripherals including a 12-bit ADC, DAC, op-amps, and zero-cross detect. The 128 KB Flash supports 10,000+ erase/write cycles for field-upgradable firmware, while 1 KB of EEPROM provides robust non-volatile data storage. The 64 MHz internal oscillator eliminates external crystals in cost-sensitive designs.
Typical applications include industrial sensor nodes with analog signal conditioning, building automation controllers, low-power IoT edge devices, appliance control boards, and USB/HID human-interface devices. The 5V-tolerant I/O and wide operating voltage range make it especially well-suited for factory-floor equipment and HVAC controllers where electrical noise is common.
When designing with this MCU, plan for in-circuit serial programming (ICSP) headers for production firmware updates and reserve the CLC outputs as PCB-trace routable signals. The exposed thermal pad on the 28-VQFN package must be soldered to the board ground plane for proper thermal dissipation and electrical performance.
This page synthesizes distributor pricing, drop-in VQFN-28 alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC18F27Q10-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 PIC18F27Q10-I/STX (same form factor and footprint) — differing in ADC, Package, Program Memory (Flash), Operating Temperature, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F26Q43T-I/STX
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC18F25Q10-I/STX
✅ Drop-In✓ In Stock
$1.58 / Unit
View Datasheet →PIC18F24Q10-I/STX
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC18F26Q10T-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.05 / Unit
View Datasheet →PIC18F27K42-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.85 / Unit
View Datasheet →PIC18F27Q10-I/STX Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18, 8-bit Harvard |
| Family | PIC18-Q10 (XLP) |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V |
| ADC | 12-bit, up to 24 channels (typical for Q10 family) |
| Configurable Logic Cells (CLC) | Yes (per Q10 family) |
| Package | 28-VQFN (4x4 mm) with exposed pad (STX = VQFN-28) |
| Operating Temperature Range | -40C to +85C (Industrial, "I") |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (per Microchip product page) |
| Lead-Free | Yes |
| 5V-Tolerant I/O | Yes |
PIC18F27Q10-I/STX Pin Configuration
| Pin 1 | RA0/AN0/C1IN0+/C2IN0+/DACOUT — Analog/Digital I/O, ADC ch0, comparator input, DAC output |
| Pin 2 | RA1/AN1/C1IN1-/C2IN1- — Analog/Digital I/O, ADC ch1, comparator input |
| Pin 3 | RA2/AN2 — Analog/Digital I/O, ADC ch2 |
| Pin 4 | RA3/AN3/VREF+ — Analog/Digital I/O, ADC ch3, positive voltage reference |
| Pin 5 | RA4/AN4 — Analog/Digital I/O, ADC ch4 |
| Pin 6 | RA5/AN5 — Analog/Digital I/O, ADC ch5 |
| Pin 7 | RA6/OSC2/CLKOUT — Digital I/O, oscillator output or CLKOUT |
| Pin 8 | RA7/OSC1/CLKIN — Digital I/O, oscillator input or CLKIN |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | RB0/AN12/C1OUT — Analog/Digital I/O, ADC ch12, comparator output |
| Pin 12 | RB1/AN10/C1IN3+ — Analog/Digital I/O, ADC ch10, comparator input |
| Pin 13 | RB2/AN8/C2IN3+ — Analog/Digital I/O, ADC ch8, comparator input |
| Pin 14 | RB3/AN9/C2IN2- — Analog/Digital I/O, ADC ch9, comparator input |
| Pin 15 | RB4/AN11 — Analog/Digital I/O, ADC ch11 |
| Pin 16 | RB5/AN13 — Analog/Digital I/O, ADC ch13 |
| Pin 17 | RB6/ICSPCLK — Digital I/O, ICSP clock programming pin |
| Pin 18 | RB7/ICSPDAT — Digital I/O, ICSP data programming pin |
| Pin 19 | RC0/SOSCO — Digital I/O, secondary oscillator output |
| Pin 20 | RC1/SOSCI — Digital I/O, secondary oscillator input |
| Pin 21 | RC2 — Digital I/O |
| Pin 22 | RC3 — Digital I/O |
| Pin 23 | RC4 — Digital I/O |
| Pin 24 | RC5 — Digital I/O |
| Pin 25 | RC6 — Digital I/O |
| Pin 26 | RC7 — Digital I/O |
| Pin 27 | RE3 — Digital I/O, MCLR alternative on some packages [DATA_NEEDED: pin function on VQFN-28] |
| Pin 28 | EP — Exposed pad, must be soldered to PCB ground |
Typical Applications
PIC18F27Q10-I/STX is suitable for 7 applications: Industrial Sensor Nodes, Building Automation Controllers, Low-Power IoT Edge Devices, Appliance Control Boards, USB / HID Human Interface Devices, Portable Consumer Electronics, Educational and Development Platforms.
Industrial Sensor Nodes
The PIC18F27Q10-I/STX is well matched to industrial sensor nodes because of its 5V-tolerant I/O, integrated 12-bit ADC with up to 24 channels, and configurable logic cells (CLCs) for hardware event detection. With 128 KB Flash, designers can implement sensor-fusion firmware, multiple communication stacks (Modbus RTU, CAN, UART), and still retain headroom for future field updates. The wide 2.3V-5.5V operating range lets it run directly from a 5V industrial rail, eliminating level shifters on analog inputs from 5V sensors.
Recommended
Building Automation Controllers
For building automation (HVAC, lighting, access control), the PIC18F27Q10-I/STX offers the 5V noise immunity required on long cable runs near inductive loads. Its intelligent analog (op-amps, DAC, zero-cross detect) can directly interface with 0-10V lighting control signals and triac-driven loads. The 128 KB Flash supports firmware stacks for BACnet, Modbus, or proprietary building protocols, while CLCs enable custom event-trigger logic without external glue parts.
Recommended
Low-Power IoT Edge Devices
The PIC18F27Q10-I/STX belongs to Microchip's XLP (eXtreme Low Power) family and supports multiple sleep modes with retention down to a few hundred nanoamps in deep sleep. Designers can wake on peripheral events, run sensor reads, transmit over UART, and return to sleep, achieving multi-year battery life in IoT edge nodes. The 128 KB Flash comfortably fits BLE/Wi-Fi co-processor command libraries plus application logic.
Recommended
Appliance Control Boards
Washing machines, dishwashers and other white goods need 8-bit MCUs with strong noise immunity and enough Flash for motor-control and UI firmware. The PIC18F27Q10-I/STX provides 128 KB Flash for user-interface state machines, plus 5V tolerance for direct drive of triac interfaces. The Q10 family's integrated op-amps can be used as current-sense amplifiers for motor-feedback loops, eliminating external analog stages.
Recommended
USB / HID Human Interface Devices
With 128 KB Flash and full-speed USB capability on Q10 family devices, the PIC18F27Q10-I/STX is suited to HID peripherals (keyboards, mice, custom controllers). The 5V tolerance simplifies interfacing to legacy PC-USB 5V rails, and the CLCs can implement debouncing and edge detection in hardware, freeing CPU cycles for HID reporting. Industrial temperature range (-40C to +85C) suits outdoor or rugged environments.
Recommended
Portable Consumer Electronics
Portable consumer products benefit from the PIC18F27Q10-I/STX's XLP features, 128 KB Flash, and small 28-VQFN 4x4 mm footprint for compact boards. Designers can implement power management, user input handling, and basic graphical/text feedback on segmented LCD or LED indicators. Low sleep current extends battery life, while 5V tolerance permits direct drive of common 5V consumer peripherals.
Recommended
Educational and Development Platforms
With 128 KB Flash, the PIC18F27Q10-I/STX is a good fit for university labs and maker boards where students need headroom for experiments. The wide operating voltage range (2.3V-5.5V) lets a single board exercise both 3.3V and 5V circuits. Microchip's MPLAB X IDE and XC8 compiler support the device fully, with the PIC18F27Q10 Curiosity Nano board providing a ready-made hardware platform for learning PIC architecture.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F27Q10-I/STX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F26Q43T-I/STX | PIC18F25Q10-I/STX | PIC18F24Q10-I/STX |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-VQFN (4x4 mm, STX) | 28-VQFN (4x4 mm, STX) - same | 28-VQFN (4x4 mm, STX) - same | 28-VQFN (4x4 mm, STX) - same |
| Core / Architecture | 8-bit PIC18 Harvard, 64 MHz | 8-bit PIC18, 64 MHz (same family) | 8-bit PIC18, 64 MHz (same family) | 8-bit PIC18, 64 MHz (same family) |
| Flash Memory | 128 KB | 64 KB | 32 KB | 16 KB |
| 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 |
| 5V-Tolerant I/O | Yes | Yes | Yes | Yes |
| Configurable Logic Cells (CLC) | Yes (Q10 family) | Yes | Yes | Yes |
| Temperature Range (I = Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Largest Flash in Q10 28-pin VQFN family (vs PIC18F26Q43T-I/STX)
- Same-family pin compatibility, more code space (vs PIC18F25Q10-I/STX)
- Includes intelligent analog and CLCs (vs PIC18F27K42-I/ML)
Design Notes
Solder the exposed thermal pad (EP) of the 28-VQFN-4x4 to the PCB ground plane for proper thermal dissipation and electrical performance. Recommended footprint: thermal pad approximately 2.5 mm x 2.5 mm with multiple vias to inner ground layers. Keep analog traces short and away from switching signals.
Configuration bits (CONFIG) must be set correctly during programming. Verify FEXTOSC, RSTOSC, WDTE and BOREN settings against your application's brownout and oscillator requirements. Pin 17 (ICSPCLK) and pin 18 (ICSPDAT) must remain accessible for production programming - do not tie them to ground.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 10) and a bulk capacitor (1-10 uF) on the same node. For designs switching between 64 MHz and deep-sleep, the MCU's internal voltage regulator needs the bulk capacitor to handle load transients without VDD droop.
When using CLCs (configurable logic cells), keep the CLC input pins routed close together on the PCB to minimize propagation delay skew between events. CLC outputs can be used to trigger ADC sampling without CPU intervention - place the CLC-driven ADC channel on an adjacent pin for shortest trace.
Compliance Information
RoHS and REACH compliance per Microchip product page. Industrial temperature grade -40C to +85C. Not AEC-Q100 qualified (industrial use, not automotive). Refer to the manufacturer datasheet for detailed environmental specifications.
