PIC18F27Q10-I/SS - 8-Bit 64MHz MCU 128KB Flash 28-SSOP | Microchip
MPN: PIC18F27Q10-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.27 | $227.00 |
| 500 | $2.04 | $1,020.00 |
| 1,000 | $1.82 | $1,820.00 |
PIC18F27Q10-I/SS Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, memory and peripherals. The PIC18 family sits within Microchip's 8-bit PIC portfolio, offering enhanced instruction set, hardware multiplier and 16-bit wide data path while retaining the classic PIC5/8 bits architecture. The PIC18F27Q10 line is optimized for low-power (XLP) sensor nodes and industrial 5V applications where noise immunity is critical.
Key differentiating features include 128KB self-programmable Flash, 25 digital I/O pins, 4x 10-bit ADC with computation, configurable logic cells (CLC), multiple communication peripherals (UART/SPI/I2C) and 5V operation across -40C to +85C industrial range. Integrated peripherals such as Complementary Waveform Generator (CWG), Hardware Limit Timer (HLT) and zero-cross detect reduce external component count.
The PIC18F27Q10-I/SS uses a RISC-style Harvard architecture with 49 instruction set and 16-bit instructions, achieving up to 16 MIPS at 64MHz. Core independent peripherals (CIPs) handle timing-critical functions in hardware, freeing the CPU for application logic and reducing firmware complexity. The device supports MPLAB ICD debugging and programming via standard tools.
Typical applications include industrial sensor nodes, IoT edge devices, low-power battery-powered systems, automotive body controllers (non-afety), consumer appliances, touch-sensing front ends, and motor control auxiliary logic. The XLP technology delivers nanoWatt power-down currents below 50 nA typical, enabling multi-year battery life on a single coin cell.
Designers should evaluate the 25 I/O budget versus required pin functions, account for SSOP thermal limits at high ambient, and confirm in-system programming path requirements. For designs needing more memory or I/O, PIC18F47Q10 (40/44-pin) and PIC18F57Q10 (48/64-pin) variants share peripheral IP.
This page synthesizes distributor pricing, drop-in compatible alternatives and design notes not aggregated on the manufacturer datasheet or on distributor catalog pages. Engineers can use this synthesis to evaluate longevity, second-source options and application fit.
Drop-in alternatives for PIC18F27Q10-I/SS — 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/SS (same form factor and footprint) — differing in ADC, Package, Comparators, Program Memory (Flash), EEPROM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F24Q10-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.18 / Unit
View Datasheet →PIC18F27K42-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.82 / Unit
View Datasheet →PIC18F27K40-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.99 / Unit
View Datasheet →PIC18F27Q10-I/SS Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit |
| Family | PIC18F Q10 / PIC® XLP™ 18Q |
| Instruction Set | 8-bit PIC, 49 instructions, 16-bit opcodes |
| Program Memory (Flash) | 128 KB |
| Data Memory (SRAM) | 3.5 KB (3.53 KB per Mouser) |
| EEPROM | 1 KB (256 B from distributor snippet; datasheet indicates 1 KB) |
| Max CPU Speed | 64 MHz |
| Operating Voltage | 1.8 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit ADC2 (multiple channels) |
| DAC | 5-bit DAC |
| Comparators | Yes (on-chip) |
| PWM Channels | Yes (CCP/PWM) |
| CWG / HLT | Complementary Waveform Generator, Hardware Limit Timer |
| Package | 28-SSOP (5.30 mm body, 0.65 mm pitch) |
| Operating Temperature | -40C to +85C (I suffix, industrial) |
| Mounting Type | Surface Mount |
| RoHS | Compliant |
PIC18F27Q10-I/SS Pin Configuration
| Pin 1 | RA2 — Port A bit 2 / analog input |
| Pin 2 | RA3 — Port A bit 3 / analog input |
| Pin 3 | RA4 — Port A bit 4 / analog input |
| Pin 4 | RA5 — Port A bit 5 / analog input |
| Pin 5 | RA6 — Port A bit 6 / OSC2 |
| Pin 6 | RA7 — Port A bit 7 / OSC1 |
| Pin 7 | VDD — Positive supply voltage (1.8-5.5 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RB0 — Port B bit 0 / analog input |
| Pin 10 | RB1 — Port B bit 1 / analog input |
| Pin 11 | RB2 — Port B bit 2 / analog input |
| Pin 12 | RB3 — Port B bit 3 / analog input |
| Pin 13 | RB4 — Port B bit 4 / analog input |
| Pin 14 | RB5 — Port B bit 5 / analog input |
| Pin 15 | RB6 — Port B bit 6 / ICSPCLK |
| Pin 16 | RB7 — Port B bit 7 / ICSPDAT |
| Pin 17 | RC0 — Port C bit 0 / analog input |
| Pin 18 | RC1 — Port C bit 1 / analog input |
| Pin 19 | RC2 — Port C bit 2 / analog input |
| Pin 20 | RC3 — Port C bit 3 / analog input / SCL |
| Pin 21 | RC4 — Port C bit 4 / analog input / SDA |
| Pin 22 | RC5 — Port C bit 5 / analog input |
| Pin 23 | RC6 — Port C bit 6 / analog input / TX |
| Pin 24 | RC7 — Port C bit 7 / analog input / RX |
| Pin 25 | RE3 — Port E bit 3 / MCLR |
| Pin 26 | RA0 — Port A bit 0 / analog input |
| Pin 27 | RA1 — Port A bit 1 / analog input |
| Pin 28 | VDD — Positive supply voltage (1.8-5.5 V) |
Typical Applications
PIC18F27Q10-I/SS is suitable for 7 applications: Industrial Sensor Node, IoT Edge Device, Consumer Appliance Control, Touch Sensing Front End, Automotive Body Controller (Non-Safety), Motor Control Auxiliary Logic, HVAC Climate Control.
Industrial Sensor Node
The PIC18F27Q10-I/SS is ideal for industrial 4-20mA sensor transmitter nodes where 5V noise immunity is required and 25 I/O pins support multiple analog front-ends. Its 10-bit ADC2 with computation offloads RMS and filtering from the CPU, while 128 KB Flash accommodates calibration tables and Modbus RTU firmware. CIPs (CLC, CWG, HLT) handle sensor excitation and zero-cross detection in hardware, enabling deterministic timing without CPU jitter. XLP technology keeps idle current below 50 nA, suitable for loop-powered 4-20mA nodes where total budget is 3.5 mA. The 64 MHz CPU delivers 16 MIPS for fast PID loops in process-control transmitters.
Recommended
IoT Edge Device
For battery-powered IoT edge nodes, the PIC18F27Q10-I/SS provides 128 KB Flash for OTA update staging and 3.5 KB SRAM for protocol buffering at sub-USD 2 BOM cost. Its nanoWatt XLP technology delivers sleep currents below 50 nA typical, enabling multi-year coin-cell operation for HVAC sensors, asset trackers and smart home nodes. The CWG peripheral drives IR LEDs directly for remote-control or LiDAR pulse generation, and the HLT handles timing-critical wake-up without CPU intervention. UART, SPI and I2C peripherals allow direct connection to Wi-Fi, BLE or LoRa modules. Operating from 1.8-5.5V lets a single LiSOCl2 cell or two AA batteries power the node across the entire discharge curve.
Recommended
Consumer Appliance Control
The PIC18F27Q10-I/SS fits small and large home appliances where 25 I/O pins drive keypads, displays and triac-switched loads. Its 5V tolerance simplifies direct interface with legacy triac drivers and zero-cross detectors. The CWG and HLT peripherals generate dead-time-controlled AC waveforms for induction cooktop or washing-machine motor drive, while 128 KB Flash hosts IEC 60730 Class B safety library. Hardware limit timers protect against fault conditions without software round-trip latency. The 64 MHz CPU runs 16 MIPS for real-time PID plus display refresh. SSOP-28 footprint allows compact PCB integration behind display modules.
Recommended
Touch Sensing Front End
The PIC18F27Q10-I/SS Microchip mTouch peripheral supports capacitive buttons, sliders and proximity sensing without external components, suitable for white-goods and industrial front panels. Its 5V operation improves touch SNR in noisy mains environments, and 128 KB Flash stores button remapping and gesture firmware. The CWG peripheral can simultaneously drive a haptic feedback PWM, while UART/SPI interfaces to the main appliance controller. ADC2 with hardware accumulation filters 60 Hz mains noise, reducing false triggers. The -40C to +85C industrial range covers kitchen and outdoor installations.
Recommended
Automotive Body Controller (Non-Safety)
For non-afety automotive body applications - interior lighting, mirror control, seat position - the PIC18F27Q10-I/SS provides 128 KB Flash for CAN/LIN stack plus diagnostics, and 10-bit ADC2 reads multiple position sensors. The CWG generates PWM for LED dimming and motor speed control up to 25 kHz without CPU overhead. The 5V tolerance survives load-dump events when paired with a TVS-clamped supply rail. Note: this is NOT AEC-Q100 qualified; for safety-critical or AEC-Q100 body modules, select PIC18F27Q10-I/SSVAO or PIC18F46Q71-E/PTCQ1. The 28-SSOP footprint simplifies hand-soldering for prototype and service harness boards.
Recommended
Motor Control Auxiliary Logic
The PIC18F27Q10-I/SS serves as an auxiliary logic and supervisory MCU alongside a dedicated motor-control IC, handling user interface, fault logging and communication. Its 25 I/O pins interface with Hall sensors, encoder feedback and keypad input, while the 10-bit ADC monitors motor current via shunt amplifier. The CWG generates brake and excitation waveforms, and HLT enforces PWM maximum on-time without software round-trip latency. 128 KB Flash stores application profiles and fault history for post-mortem diagnostics. The 64 MHz core handles 16 MIPS of supervisory tasks while leaving the main FOC algorithm to a dedicated MCU or DSP. UART/SPI bridges to a host controller for telemetry.
Recommended
HVAC Climate Control
The PIC18F27Q10-I/SS drives HVAC wall thermostats and zone controllers where 25 I/O pins read temperature/humidity sensors, drive TRIAC outputs and host an OLED display. The XLP sleep mode keeps standby power below 50 nA, suitable for Energy-Star thermostat standby requirements (<1 W total). The CLC peripherals implement custom timing logic for damper control and air-flow sequencing without discrete gates. ADC2 with computation supports averaging and threshold detection on NTC thermistor inputs. 128 KB Flash accommodates BACnet or Modbus stack plus UI firmware. The 5V tolerance interfaces directly with mains-derived TRIAC optocouplers, simplifying BOM.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F27Q10-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F24Q10-I/SS | PIC18F27K42-I/SS | PIC18F27K40-I/SS |
|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 64 KB (-50%) | 128 KB (same) | 128 KB (same) |
| SRAM | 3.5 KB | 3.5 KB (same) | 8 KB (+129%) | 3.5 KB (same) |
| EEPROM | 1 KB | 1 KB (same) | 1 KB (same) | 1 KB (same) |
| Max CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS (same) | 64 MHz / 16 MIPS (same) | 64 MHz / 16 MIPS (same) |
| ADC | 10-bit ADC2 | 10-bit ADC2 (same) | 12-bit ADC (different) | 10-bit ADC1 (different gen) |
| CIP Set | CLC, CWG, HLT, ADC2 | CLC, CWG, HLT, ADC2 (same) | CLC, NCO, 4x DAC, CWG (different) | CLC, PWM, MCCP (no CWG/HLT) |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V (same) | 1.8 V to 5.5 V (same) | 1.8 V to 5.5 V (same) |
| I/O Pins | 25 | 25 (same) | 25 (same) | 25 (same) |
| Param Match % | 100% (this product) | 90% | 80% | 70% |
Key Differentiators
- Newer Core Independent Peripherals (CLC, CWG, HLT) with 5V tolerance (vs PIC18F27K40-I/SS)
- 10-bit ADC2 with computation and oversampling (vs PIC18F27K42-I/SS)
- Larger 128 KB Flash vs 64 KB at same price tier (vs PIC18F24Q10-I/SS)
- SSOP-28 vs SOIC-28 footprint not interchangeable (vs PIC18F26K22-I/SO)
Design Notes
The PIC18F27Q10-I/SS operates from 1.8 V to 5.5 V. For USB-powered or 5V mains designs, a 100 nF ceramic decoupling capacitor must be placed within 5 mm of each VDD pin (pin 7 and pin 28) and a single 10 uF bulk capacitor near the IC. For battery-powered designs where quiescent current is critical, ensure the VDD ramp is monotonic during power-on to avoid BOR false triggers. The XLP sleep current is below 50 nA typical with RTCC and WDT disabled.
At 64 MHz, the PIC18F27Q10-I/SS draws approximately 12 mA active / 4 mA idle at 5V. In the 28-SSOP package (theta_JA ~95 C/W on a 2-layer JEDEC board), sustained 64 MHz operation at 85C ambient is within spec without forced airflow. Estimated: at 70C ambient and 12 mA, dissipation is ~60 mW, resulting in ~6C rise, well below the 125C junction limit. For sealed enclosures, derate to 32 MHz or 16 MHz to keep self-heating below 5C.
Route the ICSPDAT and ICSPCLK traces (RB6/RB7) as short as possible and away from switching nodes to avoid programming glitches. Add a 10 kohm pull-up on MCLR (pin 25 / RE3) for production stability; do not rely on the internal weak pull-up alone. Place the decoupling capacitors on the same side as the IC whenever possible. For SSOP-28 with 0.65 mm pitch, use 0.3 mm via-in-pad or fan-out routing with 0.2 mm trace/space to maintain manufacturing yield.
Do not leave unused I/O pins floating - configure them as outputs low or enable the internal weak pull-up. Floating pins can inject noise into adjacent analog channels. The ADC2 reference source defaults to VDD, but for precision readings use the dedicated VREF+ pin (not present on 28-SSOP; routed to VDD). Always specify the correct Configuration Words (CONFIG1-CONFIG5) to enable the internal 64 MHz HFINTOSC; an unconfigured device will not clock without an external crystal.
Compliance Information
RoHS compliant per Microchip product page. NOT AEC-Q100 qualified; for automotive body controller applications requiring Q100, select a Q1 suffix variant. Halogen-free per Microchip green-compliance statement. PIC18F27Q10 family is in active production with multi-fab sourcing for 10+ year longevity.
