PIC18F14Q40-I/P - 8-bit MCU, 16KB Flash, 12b ADCC | Microchip
MPN: PIC18F14Q40-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.42 | $14.20 |
| 100 | $1.18 | $118.00 |
| 500 | $1.01 | $505.00 |
| 1,000 | $0.89 | $890.00 |
PIC18F14Q40-I/P Overview
An 8-bit microcontroller (MCU) is a programmable computing element that fetches, decodes and executes instructions from on-chip Flash memory; the PIC18 family extends the baseline PIC16 instruction set with 16-bit program-word addressing, an expanded register set and linear memory access, making it well suited to applications that need deterministic interrupt response without a real-time operating system. Within Microchip's portfolio the PIC18F14Q40 belongs to the PIC18-Q40 "compact high-performance" subfamily, which emphasises analog integration for sensor and signal-conditioning front ends.
Key features include the ADCC with automated averaging, threshold compare and burst-average modes that offload signal processing from the core, dual 8-bit DACs for reference or waveform generation, a 16-bit Pulse-Width Modulation module with complementary outputs and dead-band control, and Peripheral Pin Select (PPS) that remaps most digital peripherals to virtually any I/O pin, simplifying PCB routing on a 20-pin footprint. The device also provides UART, SPI and I2C with address-mask, plus CLC and NCO blocks for hardware glue logic.
Architecture is built on a RISC Harvard core with a 16-bit instruction word, hardware multiplier and 31-level stack, supported by a wide operating-voltage range from 1.8 V to 5.5 V across the -40 °C to +85 °C industrial grade. The 64 MHz maximum clock derives from a 16 MHz internal oscillator that can be multiplied by the 4x PLL, removing the need for an external crystal in many designs; an external crystal or resonator mode is still selectable for clock-critical peripherals.
Typical applications include sensor signal conditioning in industrial IoT nodes, LED lighting control using the 16-bit PWM and DACs, small appliance user-interface panels, automotive interior auxiliary modules, low-cost closed-loop fan speed control, and battery-powered consumer devices that benefit from the low-power sleep modes. The 20-pin PDIP package suits through-hole prototyping, breadboarding and legacy retrofits.
Key design consideration: route ADCC inputs through dedicated analog pins separate from digital switching traces to preserve the 12-bit conversion accuracy; consult the manufacturer's datasheet and AN3393 application note for the reference-layout pattern.
This page synthesizes distributor pricing, drop-in alternatives in the same 20-pin footprint and practical design notes not collected in any single manufacturer document.
Drop-in alternatives for PIC18F14Q40-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 PIC18F14Q40-I/P (same form factor and footprint) — differing in ADC, PWM, Package, DAC, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F14Q40-E/P
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC18F14Q40T-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F14Q40-I/REVA
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F06Q40-E/ST
✅ Drop-In✓ In Stock
$0.81 / Unit
View Datasheet →PIC18F05Q40-E/SL
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC18F14Q40-I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC Harvard) |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 16 KB |
| SRAM | 1 KB |
| EEPROM | 512 B |
| ADC | 12-bit ADC with Computation (ADCC) |
| DACs | 2 x 8-bit DAC |
| PWM Channels | 16-bit PWM, 4 channels |
| DMA Controller | Yes (peripheral-to-memory) |
| Configurable Logic Cells (CLC) | Yes |
| Numerically Controlled Oscillator (NCO) | Yes |
| Communication Interfaces | UART, SPI, I2C (with PPS) |
| Operating Voltage Range | 1.8 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package | 20-pin PDIP (P) |
| Mounting Type | Through-Hole |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC18F14Q40-I/P Pin Configuration
| Pin 1 | RA0/ANA0 — Bidirectional I/O with analog input AN0 |
| Pin 2 | RA1/ANA1 — Bidirectional I/O with analog input AN1 |
| Pin 3 | RA2/ANA2 — Bidirectional I/O with analog input AN2 |
| Pin 4 | MCLR/VPP — Master clear (reset) and ICSP programming voltage |
| Pin 5 | RA3/ANA3 — Bidirectional I/O with analog input AN3 |
| Pin 6 | RA4/ANA4 — Bidirectional I/O with analog input AN4 |
| Pin 7 | RA5/ANA5 — Bidirectional I/O with analog input AN5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA7/OSC1 — Bidirectional I/O or external clock input |
| Pin 10 | RA6/OSC2 — Bidirectional I/O or external clock output |
| Pin 11 | RC0/AN16 — Bidirectional I/O with analog input |
| Pin 12 | RC1/AN17 — Bidirectional I/O with analog input |
| Pin 13 | RC2/AN18 — Bidirectional I/O with analog input |
| Pin 14 | RC3/AN19 — Bidirectional I/O with analog input |
| Pin 15 | RC4 — Bidirectional I/O |
| Pin 16 | RC5 — Bidirectional I/O |
| Pin 17 | RC6 — Bidirectional I/O |
| Pin 18 | RC7 — Bidirectional I/O |
| Pin 19 | VSS — Ground reference (digital) |
| Pin 20 | VDD — Positive supply voltage |
Typical Applications
PIC18F14Q40-I/P is suitable for 6 applications: Industrial IoT Sensor Nodes, LED Lighting and Color Mixing Controllers, Small Appliance User-Interface Panels, Automotive Interior Auxiliary Modules, Closed-Loop Fan Speed Control, Battery-Powered Consumer Devices.
Industrial IoT Sensor Nodes
The PIC18F14Q40-I/P suits industrial IoT sensor nodes because the 12-bit ADCC with hardware averaging and threshold-detect converts analog transducer signals without taxing the core, while the two 8-bit DACs deliver programmable excitation for bridge and thermistor front-ends. With Peripheral Pin Select, designers can route UART, I2C or SPI to any digital pin on the 20-pin DIP footprint, simplifying RF-module interface layouts. The 1.8 V to 5.5 V supply lets the same firmware run from lithium or 5 V industrial rails; built-in DMA offloads peripheral-to-memory transfers for low-power wake-and-sleep duty cycling typical of edge nodes.
Recommended
LED Lighting and Color Mixing Controllers
The PIC18F14Q40-I/P's 16-bit PWM channels with complementary outputs and programmable dead-band generation drive high-brightness LED strings at high resolution, while the two on-chip 8-bit DACs set constant-current reference levels for analog dimming. The CLCs and NCO generate dithered color-mixing waveforms in hardware, removing interrupt load from the 8-bit core. Combined with 1.8 V to 5.5 V operation the part adapts to single-cell Li-ion LED bulbs as well as 5 V COB fixtures, and the 20-pin PDIP eases hand-rework on lamp-driver prototypes.
Recommended
Small Appliance User-Interface Panels
The PIC18F14Q40-I/P is a strong fit for appliance user-interface panels: the 12-bit ADCC scans resistive touch overlays and rotary encoder inputs, while CLCs debounce button matrices in hardware and free the CPU for UI logic. DMA moves scan results into SRAM without CPU intervention, lowering average power and supporting Energy Star standby budgets. The 64 MHz core executes small TFT or segment-LCD driving loops with comfortable headroom, and the 20-pin PDIP simplifies through-hole prototyping for kitchen-appliance retrofits.
Recommended
Automotive Interior Auxiliary Modules
For automotive interior auxiliary modules such as lighting controllers, HVAC auxiliaries or seat-occupancy detectors, the PIC18F14Q40-I/P integrates peripherals that previously required dedicated logic chips: the 16-bit PWM drives LED strings, the DACs bias sensor bridges, and the ADCC conditions thermistor and capacitive-touch inputs. Designers pair the part with a CAN or LIN transceiver for body-network connectivity. Although this "/P" industrial-temperature variant is not AEC-Q100 qualified, the same die ships in PIC18F14Q40-E/SSVAO automotive parts for in-vehicle production.
Recommended
Closed-Loop Fan Speed Control
Closed-loop fan speed control benefits from PIC18F14Q40-I/P hardware features: the 16-bit PWM drives the MOSFET gate at 4 ns-edge resolution, while the ADCC samples tachometer feedback and CLCs implement PID loop math in hardware with zero CPU load. The two 8-bit DACs bias the tacho comparator or generate reference thresholds for stall detection, and the 1.8 V to 5.5 V supply lets the same firmware control 5 V brushless or 12 V PC-style fans without re-spin.
Recommended
Battery-Powered Consumer Devices
The PIC18F14Q40-I/P integrates a low-power sleep mode with peripheral wake, DMA-driven ADCC scanning, and an internal 16 MHz oscillator, allowing battery-powered devices such as wireless remotes, toys or personal-care gadgets to draw microamp-level standby current from a single CR2032 or Li-ion cell. The 1.8 V minimum supply supports single alkaline cell designs, and Core Independent Peripherals keep the CPU off until a button or sensor event triggers a routine response. The 20-pin PDIP supports hand-rework on boutique consumer-electronics prototypes.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F14Q40-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F14Q40-E/P | PIC18F06Q40-E/ST | PIC18F05Q40-E/SL |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin PDIP (P) | 20-pin PDIP | 20-pin SSOP/SOIC | 20-pin SOIC |
| Flash Memory | 16 KB | 16 KB | 8 KB | 8 KB |
| SRAM | 1 KB | 1 KB | 512 B | 512 B |
| EEPROM | 512 B | 512 B | 512 B | 512 B |
| ADC Resolution | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC |
| DAC Count | 2 x 8-bit | 2 x 8-bit | 2 x 8-bit | 1 x 8-bit |
| 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 |
| Temperature Range | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +125 C (Extended) | -40 C to +125 C (Extended) |
Key Differentiators
- 16-bit PWM with Complementary Outputs and Dead-Band Generator (vs PIC18F06Q40-E/ST)
- Industrial-Temperature 20-PDIP Variant (vs PIC18F14Q40-E/P)
- Through-Hole PDIP Drop-In Package (vs PIC18F14Q40-I/SO)
Design Notes
Estimated: at 5 V VDD with 64 MHz operation in run mode, the PIC18F14Q40-I/P draws on the order of 7 mA core current (~35 mW) and drops to ~50 nA in sleep. A 100 nF decoupling capacitor placed within 5 mm of pin 20 (VDD) plus a bulk 1 to 4.7 uF tantalum or ceramic on the same rail is recommended; place the VSS bypass symmetrically to ground pin 8 for clean ADC reference.
Route analog-capable pins (RA0-RA5, RC0-RC3) as a separate analog ground island joined at a single star point to digital VSS; this preserves the 12-bit ADCC accuracy even when switching PWM outputs share the same die. Keep PWM outputs (digital edges) at least 5 mm away from the analog cluster or place a ground guard trace between them.
Do not leave MCLR floating: tie it to VDD through a 10 to 47 kohm pull-up for normal operation, or to the ICSP connector for in-circuit programming. When using the internal oscillator do not route crystal traces to OSC1/OSC2, and disable the PLL if peripheral timing is suspect. Watch the 1.8 V minimum supply - some analog blocks (notably the ADCC) have reduced SNR below 2.5 V.
On the 20-pin PDIP footprint, configure PPS to place UART and SPI on adjacent pins (e.g., RC4-RC7) so that impedance-controlled traces stay together; isolate PWM outputs on RC0-RC3 from analog lines to avoid crosstalk into the ADCC sample. Reference Microchip application note AN3393 for the recommended 4-layer example layout pattern.
Compliance Information
Industrial temperature grade. Not AEC-Q100 qualified; for AEC-Q100, use PIC18F14Q40-E/SSVAO automotive part. RoHS and REACH compliant per Microchip product page.
