PIC18F45Q10-I/P - 32KB Flash 8-bit MCU 64MHz 40-PDIP | Microchip
MPN: PIC18F45Q10-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.3 | $3.30 |
| 10 | $2.97 | $29.70 |
| 100 | $2.66 | $266.00 |
| 500 | $2.4 | $1,200.00 |
| 1,000 | $2.15 | $2,150.00 |
PIC18F45Q10-I/P Overview
The PIC18F45Q10 belongs to the PIC18 family of 8-bit microcontrollers (MCUs) within Microchip's broader PIC® architecture hierarchy. An 8-bit MCU executes instructions on 8-bit data paths and is the workhorse of embedded control for cost-sensitive, deterministic real-time applications. PIC18 devices extend the baseline and mid-range PIC cores with 16-bit instructions, hardware multiplier, and C-optimized architecture, enabling efficient high-level language development while retaining deterministic interrupt response.
Key features of this part include a 64 MHz internal oscillator, up to 64 MHz CPU clock with 4x PLL option, 35 instruction set, 10-bit ADC with Computation (ADCC) automating averaging and threshold comparison, 5-bit DAC, 2 analog comparators with selectable hysteresis, Configurable Logic Cells (CLC) for hardware state-machine peripherals, Complementary Waveform Generator (CWG), and Peripheral Pin Select (PPS) for flexible signal routing. Functional Safety (FuSa) diagnostics make it suitable for IEC 61508 SIL-2 capable designs when used with the supporting FMEDA and diagnostic libraries.
Typical applications include industrial sensor nodes, household appliances, motor control, lighting ballasts, IoT edge nodes, automotive body and chassis subsystems, HVAC controllers, and any real-time control loop where deterministic behavior, low power, and 5V noise immunity are required. The 32KB Flash supports moderate firmware footprints typical of connected sensor firmware with protocol stacks.
When designing with this device, allocate sufficient decoupling (100 nF + 1 µF near each supply pin), use the ICSP™ header for in-circuit programming, and follow Microchip AN1255 for Class B / IEC 60730 safety diagnostics on white goods. The wide 2.3V-5.5V VDD range supports both 3.3V and 5V systems, but power-on reset thresholds differ at each range.
Drop-in alternatives for PIC18F45Q10-I/P — 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 PIC18F45Q10-I/P (same form factor and footprint) — differing in ADC, Package, Core Architecture, Program Memory (Flash), Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F46Q10-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F45Q10-I/MP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.78 / Unit
View Datasheet →PIC18F46K22-I/P
✅ Drop-In✓ In Stock
$2.61 / Unit
View Datasheet →PIC18F45K22-I/P
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC18F46K20-I/P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F4520-I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.35 / Unit
View Datasheet →PIC18F45Q10-I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data SRAM | 2 KB |
| Data EEPROM | 1 KB |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, up to 35 channels with ADCC |
| DAC | 5-bit, 2 outputs |
| Comparators | 2 with selectable hysteresis |
| Timers | 8-/16-bit, multiple CCP/ECCP |
| Communication | UART, SPI, I2C (with PPS) |
| Peripheral Pin Select (PPS) | Yes |
| Configurable Logic Cells (CLC) | Yes |
| Complementary Waveform Generator (CWG) | Yes |
| Functional Safety (FuSa) | Yes |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 40-pin PDIP (0.600 in / 15.24 mm) |
| Mounting Type | Through-Hole |
| RoHS Status | Compliant |
PIC18F45Q10-I/P Pin Configuration
| Pin 1 | RE3/MCLR — Master Clear (reset) input or digital input only |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pin 5 | RA3/AN3 — PORTA bit 3 / analog input 3 / Vref+ |
| Pin 6 | RA4/AN4 — PORTA bit 4 / analog input 4 |
| Pin 7 | RA5/AN5 — PORTA bit 5 / analog input 5 |
| Pin 8 | RE0/AN6 — PORTE bit 0 / analog input 6 |
| Pin 9 | RE1/AN7 — PORTE bit 1 / analog input 7 |
| Pin 10 | RE2/AN8 — PORTE bit 2 / analog input 8 |
| Pin 11 | VDD — Positive supply voltage (2.3V-5.5V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RA7/OSC1 — PORTA bit 7 / crystal oscillator input |
| Pin 14 | RA6/OSC2 — PORTA bit 6 / crystal oscillator output |
| Pin 15 | RC0/SOSC1 — PORTC bit 0 / secondary oscillator input |
| Pin 16 | RC1/SOSC2 — PORTC bit 1 / secondary oscillator output |
| Pin 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pin 18 | RC3/SCL1 — PORTC bit 3 / I2C clock |
| Pin 19 | RD0 — PORTD bit 0 |
| Pin 20 | RD1 — PORTD bit 1 |
| Pin 21 | RD2 — PORTD bit 2 |
| Pin 22 | RD3 — PORTD bit 3 |
| Pin 23 | RC4/SDA1 — PORTC bit 4 / I2C data |
| Pin 24 | RC5 — PORTC bit 5 |
| Pin 25 | RC6 — PORTC bit 6 |
| Pin 26 | RC7 — PORTC bit 7 |
| Pin 27 | RD4 — PORTD bit 4 |
| Pin 28 | RD5 — PORTD bit 5 |
| Pin 29 | RD6 — PORTD bit 6 |
| Pin 30 | RD7 — PORTD bit 7 |
| Pin 31 | VSS — Ground reference |
| Pin 32 | VDD — Positive supply voltage (2.3V-5.5V) |
| Pin 33 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 34 | RB1 — PORTB bit 1 |
| Pin 35 | RB2 — PORTB bit 2 |
| Pin 36 | RB3 — PORTB bit 3 |
| Pin 37 | RB4 — PORTB bit 4 |
| Pin 38 | RB5 — PORTB bit 5 |
| Pin 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 40 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC18F45Q10-I/P is suitable for 6 applications: Industrial Sensor Nodes, Household Appliance Control, HVAC and Building Automation Controllers, Automotive Body and Chassis Modules, Motor Control and BLDC Fan Drivers, IoT Edge Nodes and Connected Sensors.
Industrial Sensor Nodes
The PIC18F45Q10-I/P fits industrial sensor nodes because its 5V VDD range and noise-immune I/O tolerate the transients of factory-floor wiring, while the 32 KB Flash and 64 MHz core run deterministic sampling loops. According to the Microchip PIC18F45Q10 family datasheet, the ADCC (10-bit ADC with computation) automates averaging and threshold comparison, offloading repetitive math from the CPU and reducing firmware complexity for thermocouple, RTD, or strain-gauge conditioning firmware.
Recommended
Household Appliance Control
The PIC18F45Q10-I/P is well suited to washing machines, dishwashers, and microwave ovens thanks to its FuSa (Functional Safety) diagnostics, IEC 60730 class-B support libraries, and 5V noise immunity. The CWG and ECCP modules generate complementary PWM for triac or IGBT-based motor drive, while the 32 KB Flash holds the appliance state machine plus UI logic.
Recommended
HVAC and Building Automation Controllers
For HVAC thermostats, damper actuators, and VAV box controllers, the PIC18F45Q10-I/P provides 64 MIPS deterministic control with PPS-based flexible I/O mapping that simplifies PCB routing. The CLC (Configurable Logic Cells) implement hardware state machines for sensor-debounce or PWM edge shaping without burdening the CPU. The wide 2.3V-5.5V supply range allows direct operation from a rectified 24VAC transformer rail.
Recommended
Automotive Body and Chassis Modules
The PIC18F45Q10-I/P targets low-end body-electronics nodes like seat controllers, mirror adjusters, RKE receivers, and lighting ballasts where 8-bit cost efficiency is critical. Its 5V-tolerant I/O interfaces directly to LIN or CAN physical layers, and the ADCC performs wheel-speed or ambient-light sensing in hardware. For AEC-Q100 automotive qualification, select the automotive-grade variant of the same die.
Recommended
Motor Control and BLDC Fan Drivers
For BLDC or PMSM motor control in fans, pumps, and small appliances, the PIC18F45Q10-I/P delivers 64 MHz core plus the CWG and ECCP peripherals needed for sensorless or Hall-sensor trapezoidal commutation. The 32 KB Flash fits sensored FOC libraries for low-speed precision, and the 10-bit ADC with computation samples back-EMF in hardware, enabling quieter commutation. The 36 I/O functional from the 40-pin PDIP is sufficient for 3-phase gate drive plus HMI inputs.
Recommended
IoT Edge Nodes and Connected Sensors
IoT edge nodes benefit from the PIC18F45Q10-I/P's XLP (eXtreme Low Power) modes, 5V noise immunity, and 32 KB Flash sufficient for small MQTT-SN or CoAP stacks. PPS allows UART/SPI/I2C peripherals to be remapped to any I/O pin, simplifying PCB routing when integrating Wi-Fi or LoRa modules. The on-chip ADCC performs sensor conditioning with zero CPU overhead, extending battery life in battery-powered edge deployments.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F45Q10-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F46Q10-I/P | PIC18F46K22-I/P | PIC18F45K22-I/P | PIC18F4520-I/P |
|---|---|---|---|---|---|
| Package | 40-PDIP (0.600 in) | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same | 40-PDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 64 KB (+100%) | 64 KB (+100%) | 32 KB (same) | 32 KB (same) |
| SRAM | 2 KB | 2 KB (same) | 3 KB (+50%) | 1.5 KB (-25%) | 1.5 KB (-25%) |
| CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS (same) | 64 MHz / 16 MIPS (same) | 64 MHz / 16 MIPS (same) | 40 MHz / 10 MIPS (-37%) |
| ADC | 10-bit ADCC | 10-bit ADCC (same) | 10-bit ADC (no ADCC) | 10-bit ADC (no ADCC) | 10-bit ADC (no ADCC) |
| CLC / CWG | Yes | Yes (same) | No | No | No |
| Functional Safety (FuSa) | Yes | Yes (same) | No | No | No |
| Approx Unit Price (qty-1) | $3.30 | $3.80 (+15%) | $5.00 (+51%) | $4.50 (+36%) | $4.20 (+27%) |
Key Differentiators
- Functional Safety (FuSa) diagnostics built in (vs PIC18F45K22-I/P)
- ADCC hardware averaging offloads CPU (vs PIC18F4520-I/P)
- CLC + CWG add programmable peripherals (vs PIC18F45K22-I/P)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin (pins 11 and 32) and a bulk 1 µF-10 µF tantalum or ceramic capacitor near the device. The PIC18F45Q10-I/P has two VDD pins; both must be decoupled to suppress switching noise from the internal oscillator and CWG/ECCP peripherals.
Do not leave the MCLR pin (pin 1) floating. Per the PIC18F45Q10 datasheet, MCLR must be tied to VDD through a 10 kΩ resistor (or driven by the supervisor) for reliable reset. Floating MCLR causes erratic resets in noisy industrial environments. Configure the MCLRE configuration bit to disable internal MCLR only when an external supervisor is present.
Estimated: at 64 MHz, 5V supply, full I/O load (~36 mA), and 50% I/O toggling, internal dissipation stays under 200 mW. The 40-PDIP package handles this comfortably without heatsinking. In high-temperature industrial enclosures (>70°C ambient), verify that the -40C to +85C industrial rating covers your worst-case ambient plus self-heating.
Route the ICSP clock (PGC, pin 39) and ICSP data (PGD, pin 40) lines with ground shielding or keep them short to prevent programming errors. Use a 5-pin header (VDD, VSS, PGC, PGD, MCLR) placed on the board edge for production programming access; this avoids the need for socket removal in manufacturing.
When using the ADC for precision measurements, place a 100 nF ceramic on the Vref+ pin (RA3) and avoid switching digital signals near AVDD/AVSS. Use PPS to remap high-frequency PWM (ECCP/CWG) to PORTB or PORTD pins away from analog inputs to reduce crosstalk below 1 LSB on the 10-bit ADC.
Compliance Information
Industrial temperature grade (-40C to +85C) per -I suffix. Not AEC-Q100 qualified - automotive applications should select the automotive grade variant of the same die. RoHS compliant per Microchip product declaration.
