PIC18F14Q40-E/P - 8-bit MCU, 16KB Flash, 12b ADC | Microchip
MPN: PIC18F14Q40-E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.14 | $2.14 |
| 10 | $1.93 | $19.30 |
| 100 | $1.71 | $171.00 |
| 500 | $1.5 | $750.00 |
| 1,000 | $1.34 | $1,340.00 |
| 3,000 | $1.18 | $3,540.00 |
PIC18F14Q40-E/P Overview
An 8-bit microcontroller (MCU) is a programmable processor built around an 8-bit data path that executes instructions on bytes rather than 16- or 32-bit words. The PIC18 family sits in Microchip's mid-range tier, balancing deterministic interrupt response with rich analog peripherals and low power consumption; it serves as a bridge between 16-bit dsPIC devices and low-pin-count baseline PIC parts. The Q40 sub-family adds a 12-bit ADCC, DMA controller, configurable logic cells, and high-resolution 16-bit PWM, targeting closed-loop control designs that previously required a DSPIC.
Key features of the PIC18F14Q40-E/P include the 12-bit ADCC with up to 12 channels, hardware-accelerated averaging, threshold detection, and computation features that offload sensor conditioning from the core. Two 8-bit DACs, a 5-bit DAC reference, and the DMA controller support background data movement, while 16-bit PWM with multiple independent time bases enables precise motor, lighting, or power conversion control. PPS remaps digital peripherals to most I/O pins, easing PCB layout.
Architecture-wise, the device uses an enhanced PIC18 Harvard core with a modified RISC instruction set, hardware multiply, and 16-bit instruction words. Internal oscillator accuracy supports USB-less timing-sensitive tasks; the CIP (Core Independent Peripherals) ecosystem lets CLC, PWM, and ADCC chain events without CPU intervention, enabling deterministic sub-microsecond response.
Typical applications include LED lighting drivers, BLDC fan and pump controllers, IoT sensor nodes, automotive body electronics, industrial sensor signal conditioning, and consumer white goods. The DIP-20 package suits through-hole prototyping, hobby projects, and designs requiring socketed replacements. As an -E (extended) part, it operates from -40C to +125C, qualifying for harsh industrial and automotive environments.
Designers should note that PPS remapping requires careful review: not every peripheral function maps to every pin, and default assignments may need explicit configuration after reset. Programming is supported by Microchip's MPLAB X IDE, XC8 compiler, and PICkit/SNAP debuggers.
This page consolidates distributor pricing, drop-in alternatives, and engineering design notes that the manufacturer datasheet alone does not provide.
Drop-in alternatives for PIC18F14Q40-E/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-E/P (same form factor and footprint) — differing in ADC, Package, Mounting Type, Program Memory (Flash), Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F14Q40-I/P
✅ Drop-In✓ In Stock
$0.89 / Unit
View Datasheet →PIC18F14Q40-E/SO
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC18F14K22-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F14K50-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F13K22-I/P
✅ Drop-In✓ In Stock
$1.21 / Unit
View Datasheet →PIC18F1220-I/P
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →PIC18F14Q40-E/P Maximum Ratings & Electrical Characteristics
| Product Family | PIC18-Q40 |
| Core | PIC18 8-bit RISC (Harvard) |
| Program Memory (Flash) | 16 KB |
| Data RAM | 1 KB |
| EEPROM | 512 B |
| Operating Frequency | Up to 64 MHz |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| ADC | 12-bit ADCC, up to 12 channels |
| DAC | 2x 8-bit DAC |
| PWM | 16-bit PWM, multiple time bases |
| DMA | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Configurable Logic Cells (CLC) | Yes |
| UART / SPI / I2C | Yes |
| Package | 20-pin PDIP (DIP-20) |
| Pin Count | 20 |
| Mounting Type | Through-Hole |
| Operating Temperature | -40C to +125C (E = Extended) |
| Temperature Grade | Automotive |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| MSL Level | 1 (unlimited) |
PIC18F14Q40-E/P Pin Configuration
| Pin 1 | RA5/MCLR — General I/O / Master Clear (reset) input |
| Pin 2 | RA0 — General I/O / analog input |
| Pin 3 | RA1 — General I/O / analog input |
| Pin 4 | RA2 — General I/O / analog input |
| Pin 5 | RA3 — General I/O / analog input |
| Pin 6 | RA4 — General I/O |
| Pin 7 | RA7 — General I/O / oscillator |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RA6 — General I/O / oscillator |
| Pin 10 | RC0 — General I/O / analog input |
| Pin 11 | RC1 — General I/O / analog input |
| Pin 12 | RC2 — General I/O / analog input |
| Pin 13 | RC3 — General I/O / analog input |
| Pin 14 | RC4 — General I/O |
| Pin 15 | RC5 — General I/O |
| Pin 16 | RC6 — General I/O |
| Pin 17 | RC7 — General I/O |
| Pin 18 | RB7 — General I/O / programming clock |
| Pin 19 | VDD — Positive supply voltage |
| Pin 20 | VSS — Ground reference |
Typical Applications
PIC18F14Q40-E/P is suitable for 6 applications: BLDC Fan and Pump Motor Control, LED Lighting and Smart Dimming, Industrial Sensor Signal Conditioning, Automotive Body Electronics, IoT Sensor Nodes and Edge Devices, Consumer White Goods and Home Appliances.
BLDC Fan and Pump Motor Control
The PIC18F14Q40-E/P fits BLDC fan and pump controllers thanks to its 16-bit PWM with complementary outputs and configurable dead-band, plus the 12-bit ADCC for back-EMF sensing on a low-pin-count DIP part. Up to 64 MHz core and DMA offload commutation timing so the CPU stays free for closed-loop PID computation. The extended -40C to +125C temperature grade handles under-hood automotive fan applications; PPS lets designers place PWM and ADC channels on adjacent pins to shorten analog routing. With a typical 4 kHz PWM frequency and 20 kHz ADC sampling, the same firmware scales from 5 V microcontroller to 12 V automotive rails.
Recommended
LED Lighting and Smart Dimming
The PIC18F14Q40-E/P's 16-bit PWM and two 8-bit DACs make it well matched to constant-current LED drivers that need both analog dimming and digital PWM dimming. The 12-bit ADCC monitors photodiode feedback for ambient-light sensing and closed-loop brightness control, while DMA streams ADC results into RAM without CPU load. PPS lets the same firmware reuse any I/O for PWM, simplifying board variants across single-channel, RGBW, and tunable-white products. Operating from 1.8 V to 5.5 V, the Q40 fits both 3.3 V wireless-controlled fixtures and 5 V DMX-style lighting nodes in commercial and architectural LED markets.
Recommended
Industrial Sensor Signal Conditioning
The PIC18F14Q40-E/P's 12-bit ADCC with hardware averaging, threshold detection, and oversampling is ideal for analog sensor front-ends (RTD, thermocouple, load cell, 4-20 mA current loop) where raw ADC counts need digital filtering. DMA channels move samples into RAM autonomously, and the CLC peripheral triggers sensor excitation on timer events without CPU wakeup. With -40C to +125C operation, the device tolerates factory-floor temperature swings; PPS remaps UART/SPI/I2C to any I/O for clean sensor isolation routing. The 20-pin PDIP package simplifies bench characterization and through-hole rework in low-volume industrial instrumentation.
Recommended
Automotive Body Electronics
The -E temperature grade and automotive-grade qualification of the PIC18F14Q40-E/P target automotive body modules such as seat controllers, mirror adjusters, lighting controllers, and HVAC blend-door actuators. CIP peripherals (CLC, 16-bit PWM, ADCC, DMA) deliver deterministic sub-millisecond response to LIN or CAN inputs while the core stays idle, reducing average current draw. Operating from 1.8 V to 5.5 V lets the same hardware run on 5 V regulated rails or 12 V battery with external LDO; PPS enables flexible pin assignment to ease module variants for left-hand vs right-hand drive vehicles.
Recommended
IoT Sensor Nodes and Edge Devices
The PIC18F14Q40-E/P runs Core Independent Peripherals to wake only the peripherals needed for a measurement, allowing IoT sensor nodes to spend most of their time in sleep and still respond within microseconds when a sensor threshold is crossed. The 12-bit ADCC handles battery-monitoring and analog sensor reads, while 16 KB Flash accommodates small LoRaWAN or MQTT firmware stacks. DMA + UART/SPI/I2C interfaces wire directly to sub-GHz transceivers or BLE modules without CPU intervention. PPS allows the same firmware image to remap peripherals across PCB variants, accelerating product family roll-outs.
Recommended
Consumer White Goods and Home Appliances
The PIC18F14Q40-E/P brings 16-bit PWM and 12-bit ADCC to consumer appliances like washing machine pumps, induction cooktop controls, and microwave displays where cost-effective DIP-20 sockets aid serviceability. CIP peripherals drive user-interface feedback (LEDs, buzzers, seven-segment displays) without real-time firmware load, while the ADCC handles keypad scanning and temperature sensing simultaneously. Extended temperature grade -40C to +125C covers refrigerator compressor compartments and oven-control panels. PPS + DMA simplify touch-button firmware and enable capacitive-sensing front-ends using the ADCC and CLC together.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F14Q40-E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F14Q40-I/P | PIC18F14Q40-E/SO | PIC18F14K22-I/P | PIC18F14K50-I/P | PIC18F13K22-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin PDIP (DIP-20) | 20-pin PDIP (DIP-20) - same | 20-pin SOIC - different land pattern | 20-pin PDIP (DIP-20) - same | 20-pin PDIP (DIP-20) - same | 20-pin PDIP (DIP-20) - same |
| Flash / RAM / EEPROM | 16 KB / 1 KB / 512 B | 16 KB / 1 KB / 512 B - identical | 16 KB / 1 KB / 512 B - identical | 16 KB / 512 B / 256 B - less RAM/EEPROM | 16 KB / 768 B / 256 B - less RAM/EEPROM | 8 KB / 256 B / 256 B - 50% Flash |
| ADC | 12-bit ADCC | 12-bit ADCC - identical | 10-bit ADC | 10-bit ADC + 2x 8-bit DAC | 10-bit ADC | |
| DAC | 2x 8-bit DAC | 2x 8-bit DAC - identical | None | None | None | |
| DMA | Yes | Yes - identical | No | No | No | |
| 16-bit PWM | Yes | Yes - identical | Yes (2x 10-bit PWM only on K22) | 10-bit PWM only | Yes (10-bit) | |
| USB | No | No - identical | No | Yes (USB 2.0 FS) | No | |
| Temperature Range | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) - identical | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
Key Differentiators
- 12-bit ADCC with computation features (vs PIC18F14K22-I/P)
- Dual 8-bit DAC + DMA (vs PIC18F14K50-I/P)
- Extended -40C to +125C temperature grade (vs PIC18F14Q40-I/P)
Design Notes
Place a 100 nF ceramic decoupling capacitor between VDD (pin 19) and VSS (pin 20) within 5 mm of the package leads to suppress switching transients; add a bulk 10 uF tantalum or aluminum capacitor near the supply rail for sustained load steps. The PIC18F14Q40-E/P operates from 1.8 V to 5.5 V, so for noisy 12 V or 24 V automotive rails use an external LDO such as the MCP1700 or MCP16301 before the MCU. Estimated: at 64 MHz core and full peripheral activity, peak VDD current is in the 10-15 mA range - verify with a worst-case load calculation when designing sleep-current budgets.
PPS default mapping is NOT active after reset - the firmware must configure PPS registers before assigning peripheral functions to specific I/O pins. The MCLR pin (pin 1 shared with RA5) requires an external pull-up to VDD (typically 10 kOhm) unless the internal MCLR is disabled via configuration bits; forgetting this leaves the device in a permanent reset state. The ADCC threshold-detection interrupt can fire on the very first conversion after power-up - delay enabling the interrupt until after initial calibration conversions complete to avoid spurious wake events.
Keep analog input traces away from PWM outputs to minimize crosstalk; the 12-bit ADCC resolution can be degraded by 1-2 LSB if high-frequency PWM traces run parallel to ADC traces for more than 10 mm. Place the analog reference (if external) capacitor as close to VREF+ as possible; the 20-pin PDIP pinout provides only one dedicated VREF+ pin shared with analog channels, so external buffering may be needed for high-impedance sensors. Route the crystal or external clock traces with short, symmetric traces to GND for stable 64 MHz operation.
At -40C to +125C ambient in sealed automotive enclosures, verify that the PIC18F14Q40-E/P's junction temperature stays below 150C with the actual board-mounted thermal resistance. Estimated: at 5 V VDD, 64 MHz CPU active with all peripherals on, internal dissipation is approximately 50-100 mW (varies by I/O load), well within the PDIP-20 thermal envelope (theta_JA around 70-90 C/W on a 1 oz copper PCB). For -40C cold-start applications, allow up to 10 ms oscillator stabilization time before executing time-sensitive code after POR.
Compliance Information
AEC-Q100 qualification inferred from -E temperature grade designation and Microchip automotive product family listings. RoHS and REACH compliance per Microchip product page. Lead-free per Microchip packaging specifications. Halogen-free status not explicitly listed in retrieved data - marked unknown.
