PIC18F27Q10T-I/SS - 128KB Flash 8-bit XLP MCU | Microchip
MPN: PIC18F27Q10T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.51 | $2.51 |
| 10 | $2.27 | $22.70 |
| 100 | $2.03 | $203.00 |
| 500 | $1.84 | $920.00 |
| 1,000 | $1.72 | $1,720.00 |
| 3,000 | $1.65 | $4,950.00 |
PIC18F27Q10T-I/SS Overview
An 8-bit microcontroller (MCU) is a self-contained compute element that integrates a CPU, non-volatile program memory, working RAM, and a mix of analog/digital peripherals onto a single die. Within the broader taxonomy, an 8-bit MCU sits below 16-bit MCUs (e.g., dsPIC33) and 32-bit MCUs (e.g., Cortex-M0) in arithmetic throughput but offers the lowest cost, lowest power, and simplest instruction set, making it ideal for deterministic real-time control tasks. The PIC18 family is Microchip's enhanced 8-bit line, adding a hardware multiplier, linear memory map, and C-friendly architecture over legacy PIC16 parts.
The PIC18F27Q10's Core Independent Peripherals (CIPs) - including CWG, HLT, CCP, PWM, and configurable logic cells - allow timing-critical functions to run without CPU intervention, freeing the 64 MHz core for application logic and communication stacks. The 5 V-tolerant I/O simplifies interface to legacy 5 V analog front-ends, while the nanoWatt XLP technology delivers sleep currents in the nanoamp range for battery-powered sensor nodes. Integrated op amps, comparators, and a 10-bit ADC with computation (ADC²) further reduce external BOM.
Typical applications include IoT sensor nodes, low-power wireless sensor networks, building automation control, appliance motor control, and industrial sensor interfacing. The 5 V noise immunity also suits factory automation where long sensor cables pick up transients.
When designing with the PIC18F27Q10, ensure decoupling capacitors (100 nF + 1 µF) are placed within 5 mm of VDD pins and that the ICSP™ programming pins (PGx/DGx) are not loaded down externally, otherwise in-circuit debug and programming will fail.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the Microchip datasheet, enabling faster part selection and BOM validation.
Drop-in alternatives for PIC18F27Q10T-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 PIC18F27Q10T-I/SS (same form factor and footprint) — differing in Package, Operating Temperature, Program Memory (Flash), ADC, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F27Q10-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F26Q10T-I/SS
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC18F26Q10-I/SS
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC18F25Q10-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F24Q10-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F27Q10T-I/SS Maximum Ratings & Electrical Characteristics
| Core | PIC18 8-bit RISC |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data SRAM | 3.5 KB (3.53 KB) |
| Data EEPROM | 256 B |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit, multiple channels |
| DAC | 5-bit |
| Comparators | Yes (integrated) |
| CCP / PWM / CWG | Yes |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 28-SSOP (0.209 inch / 5.30 mm width) |
| Mounting Type | Surface Mount |
| MSL Level | MSL1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
PIC18F27Q10T-I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active-low |
| Pin 2 | RA0 — PORTA bit 0 / analog input |
| Pin 3 | RA1 — PORTA bit 1 / analog input |
| Pin 4 | RA2 — PORTA bit 2 / analog input |
| Pin 5 | RA3 — PORTA bit 3 / analog input |
| Pin 6 | RA4 — PORTA bit 4 / analog input |
| Pin 7 | RA5 — PORTA bit 5 / analog input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7 — PORTA bit 7 / oscillator |
| Pin 10 | RA6 — PORTA bit 6 / oscillator |
| Pin 11 | RC0 — PORTC bit 0 |
| Pin 12 | RC1 — PORTC bit 1 |
| Pin 13 | RC2 — PORTC bit 2 |
| Pin 14 | RC3 — PORTC bit 3 / SCL |
| Pin 15 | RC4 — PORTC bit 4 / SDA |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6 — PORTC bit 6 / TX |
| Pin 18 | RC7 — PORTC bit 7 / RX |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
| Pin 21 | RB0 — PORTB bit 0 / interrupt-on-change |
| Pin 22 | RB1 — PORTB bit 1 / interrupt-on-change |
| Pin 23 | RB2 — PORTB bit 2 / interrupt-on-change |
| Pin 24 | RB3 — PORTB bit 3 / interrupt-on-change |
| Pin 25 | RB4 — PORTB bit 4 / interrupt-on-change |
| Pin 26 | RB5 — PORTB bit 5 / interrupt-on-change |
| Pin 27 | RB6 — PORTB bit 6 / ICSP CLK |
| Pin 28 | RB7 — PORTB bit 7 / ICSP DATA |
Typical Applications
PIC18F27Q10T-I/SS is suitable for 6 applications: IoT Wireless Sensor Nodes, Building Automation and HVAC Control, Appliance Motor Control (BLDC/PMSM), Industrial Sensor Interfacing, Low-Power Battery Monitoring, User Interface and HMI Control.
IoT Wireless Sensor Nodes
The PIC18F27Q10T-I/SS fits battery-powered IoT sensor nodes where its 128 KB Flash accommodates LoRaWAN or BLE protocol stacks alongside application code, and its nanoWatt XLP sleep currents extend battery life to multi-year horizons. Operating from 1.8-5.5 V, it accepts a single Li-Ion cell or 2xAA alkaline pack directly without a boost converter. The integrated 10-bit ADC with computation (ADC²) handles averaging and threshold detection automatically, offloading the 16 MIPS CPU core to manage the radio and sensor I/O. Compared to 32-bit Cortex-M0 alternatives at this price point, the PIC18F27Q10's deterministic interrupt latency and 5 V tolerance simplify interface to legacy analog front-ends. Q10 supply: cheap SiP radios in the $1-3 range pair well with this MCU on the same PCB.
Recommended
Building Automation and HVAC Control
The PIC18F27Q10T-I/SS suits building automation controllers thanks to its 5 V-tolerant I/O, which interfaces directly to legacy 24 V AC-coupled sensor inputs (via external rectification) and triac-based HVAC actuators without level shifters. The 128 KB Flash stores Modbus RTU, BACnet, or proprietary HVAC protocol stacks, while the 3.5 KB SRAM handles message buffers. CWG and HLT peripherals drive triac gating directly with hardware dead-time insertion, eliminating software jitter in temperature control loops. Compared to ARM Cortex-M0 alternatives, the Q10's deterministic interrupt response and lower cost per unit make it preferred for wall thermostats and VAV box controllers deployed in high volumes.
Recommended
Appliance Motor Control (BLDC/PMSM)
For appliance motor drives in washing machines, fans, and small pumps, the PIC18F27Q10T-I/SS leverages its CWG (Complementary Waveform Generator) and HLT (Hardware Limit Timer) peripherals to produce center-aligned PWM with hardware dead-time insertion, driving half-bridges with cycle-by-cycle current limiting. The integrated comparators and op amps implement hardware overcurrent protection that responds in nanoseconds - faster than any software loop could. 128 KB Flash stores field-oriented control (FOC) lookup tables and sensorless algorithms, while the 64 MHz CPU sustains the control loop rate. 5 V tolerance simplifies interface to mains-isolated gate drivers and Hall sensors.
Recommended
Industrial Sensor Interfacing
The PIC18F27Q10T-I/SS excels at industrial sensor aggregation nodes where 5 V noise immunity protects against long-cable transients in factory environments. The 10-bit ADC with computation oversamples to 12-bit effective resolution, while 5-bit DAC and comparators form local closed-loop trim circuits for pressure and flow sensors. 128 KB Flash supports IEC 61131-3 function-block runtimes and Modbus gateways, with the 25 I/O handling multiple 4-20 mA loops via external current-sense amplifiers. Compared to discrete logic implementations, the integrated CIPs reduce BOM and PCB area while improving MTBF in 24/7 industrial operation.
Recommended
Low-Power Battery Monitoring
Battery management for portable medical, e-bike, and consumer products benefits from the PIC18F27Q10T-I/SS's nanoWatt XLP technology, which delivers sleep currents below 100 nA with RTC running. The 10-bit ADC measures cell voltage and current at low duty cycle, while integrated op amps condition thermistor inputs for temperature-compensated fuel gauging. 128 KB Flash stores lookup-table-based SoC algorithms, and 5 V tolerance interfaces directly to 1S-4S Li-Ion battery stacks. Compared to standalone fuel-gauge ICs, this approach adds flexibility for custom battery chemistries at the cost of software development effort.
Recommended
User Interface and HMI Control
The PIC18F27Q10T-I/SS drives segment LCDs, button matrices, and rotary encoders in appliance and industrial HMI front panels. The CWG generates contrast-adjusted LCD bias voltages, while PWM channels dim LED backlights. The 128 KB Flash accommodates custom Unicode font tables and multi-language menu structures, and 3.5 KB SRAM holds screen buffers for graphics primitives. With 25 I/O, a 4x4 button matrix plus 7-segment display consumes only 11 pins, leaving headroom for UART debug and one-wire sensor interfaces. The 5 V tolerance simplifies interface to legacy LCD modules without level translation.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F27Q10T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F27Q10-I/SS | PIC18F26Q10T-I/SS | PIC18F26Q10-I/SS | PIC18F25Q10-I/SS | PIC18F24Q10-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Flash Memory | 128 KB | 128 KB | 64 KB (-50%) | 64 KB (-50%) | 32 KB (-75%) | 16 KB (-87.5%) |
| SRAM | 3.5 KB | 3.5 KB | 3.5 KB | 3.5 KB | 2 KB | 1.5 KB |
| Maximum CPU Frequency | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| Operating 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 |
| I/O Pins | 25 | 25 | 25 | 25 | 24 | 24 |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Industrial Temp (-40 to +85 C) | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Highest Flash density in PIC18FxxQ10 SSOP-28 family (vs PIC18F26Q10T-I/SS)
- 5 V-tolerant I/O on a low-cost 8-bit MCU (vs PIC18F27K42T-I/SO)
- Core Independent Peripherals (CIPs) reduce CPU load (vs PIC18F24Q10-I/SS)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of each VDD pin (pin 20 on SSOP-28), and add a bulk 1 uF to 10 uF tantalum or ceramic capacitor on the same rail. The PIC18F27Q10 has two VDD pins (20 and the analog AVDD if present); each requires its own local decoupling. For battery applications, the nanoWatt XLP sleep current spec assumes VDD is stable - any ripple above 50 mVpp can prevent entry into deep sleep.
The ICSP programming pins (RB6/PGD and RB7/PGC, pins 27-28) must not be loaded down with more than 50 pF of stray capacitance or low-impedance external pull-ups stronger than 10 kohm. The PICkit programmer cannot drive against heavy loads, and in-circuit debug will fail. If the application requires RB6/RB7 for general I/O, route them so they can be isolated by zero-ohm resistors or jumpers during programming.
The PIC18F27Q10's 10-bit ADC accuracy degrades if the analog supply impedance exceeds 1 kohm at the AVDD pin. Place a 10 uH inductor or ferrite bead between VDD and AVDD, with a 100 nF capacitor on each side. Route analog signals (RA0-RA5) on a separate PCB layer or guard-trace them with ground to avoid coupling from PWM outputs (RC1/RC2) which carry high dV/dt signals.
Do not leave MCLR floating - tie it to VDD through a 10 kohm pull-up resistor, with a 100 nF capacitor to ground for noise filtering. A floating MCLR causes spurious resets in electrically noisy environments. Also remember that the PPS (Peripheral Pin Select) unlock sequence must be executed after each POR; code that configures PPS at startup but never re-enables it after a WDT reset will fail silently.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC18F27Q10-E/SS extended-temperature variant or PIC18F27Q10 automotive-grade version for AEC-Q100 requirements.
