PIC18F14Q40-E/REB - 8-Bit MCU, 64MHz, 16KB Flash | Microchip
MPN: PIC18F14Q40-E/REB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.05 | $1.05 |
| 10 | $0.94 | $9.40 |
| 100 | $0.85 | $85.00 |
| 500 | $0.76 | $380.00 |
| 1,000 | $0.68 | $680.00 |
PIC18F14Q40-E/REB Overview
An 8-bit microcontroller (MCU) is a small, low-power computer on a single integrated circuit that combines a CPU, memory, and programmable I/O peripherals. MCUs sit at the bottom of the embedded-computing hierarchy (MCU -> microcontroller -> embedded controller -> semiconductor) and are used in nearly every electronic product that requires decision-making logic. The PIC18 architecture is a popular 8-bit core known for deterministic interrupt response, mature toolchains, and excellent code density for C and assembly projects.
Key features of the PIC18F14Q40-E/REB include a 12-bit ADC with Computation (ADC2), two 8-bit DACs, 16-bit PWMs with complementary output and fault handling, Direct Memory Access (DMA), Configurable Logic Cells (CLC), and multiple communication peripherals such as UART, SPI, and I2C. The wide operating voltage range of 1.8V to 5.5V supports both 3.3V and 5V systems, while the integrated peripherals reduce external component count. The device also supports touch and proximity sensing via the ADC2 and CLC peripherals.
Typical applications for this MCU include IoT sensor nodes, motor control, LED lighting controllers, household appliances, and battery-powered instrumentation. The wide operating voltage range and integrated analog make it especially well suited for sensor-fusion front ends that combine multiple analog sensors with digital I/O.
When designing with the PIC18F14Q40-E/REB, ensure that the thermal pad on the VQFN package is properly soldered to the PCB ground plane to maintain mechanical reliability and thermal performance. The device is supported by MPLAB X IDE, XC8 compilers, and the MPLAB Code Configurator (MCC) for rapid peripheral setup.
Drop-in alternatives for PIC18F14Q40-E/REB — 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/REB (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-I/REB
✅ Drop-In✓ In Stock
$0.71 / Unit
View Datasheet →PIC18F14Q40-E/P
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC18F16Q40-I/REB
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F05Q41-E/ST
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →PIC18F06Q40-E/ST
✅ Drop-In✓ In Stock
$0.81 / Unit
View Datasheet →PIC18F14Q40-E/REB Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 (8-bit RISC) |
| Maximum CPU Speed | 64 MHz |
| Program Memory (FLASH) | 16 KB (16K x 8) |
| Data SRAM | 1 KB |
| Data EEPROM | 512 bytes |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 12-bit ADC with Computation (ADC2) |
| DAC | 2 x 8-bit DAC |
| PWM | 16-bit PWM with complementary output and fault input |
| DMA Channels | Yes (Direct Memory Access) |
| Configurable Logic Cells (CLC) | Yes |
| Communication Peripherals | UART, SPI, I2C |
| Package | 20-pin VQFN (3x3 mm) |
| Operating Temperature Range | -40 C to +125 C (Extended, -E suffix) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F14Q40-E/REB Pin Configuration
| Pin 1 | RA0 — Analog/Digital I/O |
| Pin 2 | RA1 — Analog/Digital I/O |
| Pin 3 | RA2 — Analog/Digital I/O |
| Pin 4 | RA3 — Analog/Digital I/O |
| Pin 5 | RA4 — Analog/Digital I/O |
| Pin 6 | RA5 — Analog/Digital I/O |
| Pin 7 | VSS — Ground |
| Pin 8 | RA6 — Analog/Digital I/O |
| Pin 9 | RA7 — Analog/Digital I/O |
| Pin 10 | RB0 — Digital I/O / Interrupt |
| Pin 11 | RB1 — Digital I/O |
| Pin 12 | RB2 — Digital I/O |
| Pin 13 | RB3 — Digital I/O |
| Pin 14 | RB4 — Digital I/O |
| Pin 15 | RB5 — Digital I/O |
| Pin 16 | RB6 — Digital I/O / ICSP Clock |
| Pin 17 | RB7 — Digital I/O / ICSP Data |
| Pin 18 | VDD — Positive Supply Voltage |
| Pin 19 | VSS — Ground (duplicate for thermal pad) |
| Pin 20 | EP — Exposed Thermal Pad (must be soldered to PCB ground plane) |
Typical Applications
PIC18F14Q40-E/REB is suitable for 6 applications: IoT Sensor Node, BLDC / DC Motor Control, LED Lighting Controller, Battery-Powered Instrumentation, Home Appliance Control Board, Touch / Proximity Sensing Interface.
IoT Sensor Node
The PIC18F14Q40-E/REB's 12-bit ADC with Computation (ADC2), two 8-bit DACs, and DMA engine make it an ideal MCU for IoT sensor nodes that aggregate multiple analog and digital sensors. The 64 MHz CPU provides 16 MIPS of throughput to filter and pre-process sensor data before transmitting over UART/SPI/I2C. The wide 1.8V to 5.5V operating range allows direct connection to single-cell Li-ion or multi-cell alkaline battery packs without external regulation. The 20-VQFN (3x3 mm) package occupies minimal PCB area, enabling compact wireless sensor modules. Compared to discrete ADC + MCU designs, integrating the ADC2 reduces BOM cost and PCB space. Place a 100 nF decoupling capacitor within 5 mm of the VDD pin.
Recommended
BLDC / DC Motor Control
The PIC18F14Q40-E/REB integrates a 16-bit PWM with complementary output and fault input, two 8-bit DACs, and Configurable Logic Cells (CLC), providing all the key peripherals for small BLDC or brushed DC motor control. The 64 MHz CPU executes field-oriented control or trapezoidal commutation loops within budget. The DMA engine offloads ADC sampling from the CPU, improving control loop determinism. The -40 C to +125 C extended temperature range supports automotive underhood and industrial motor drive environments. The 20-VQFN (3x3 mm) package with central thermal pad dissipates heat efficiently at moderate PWM switching frequencies.
Recommended
LED Lighting Controller
The PIC18F14Q40-E/REB's 16-bit PWM with complementary output drives high-power LED strings with high-resolution dimming and color mixing. The two 8-bit DACs generate analog reference voltages for LED current control loops. The CLC peripheral combines PWM and comparator signals for hardware-based over-temperature and over-current protection without CPU intervention. The 1.8V to 5.5V supply supports direct battery operation in portable LED fixtures. Compared to discrete PWM controller ICs, integrating the MCU enables custom dimming curves, DMX/RDM protocols, and IoT connectivity on a single chip.
Recommended
Battery-Powered Instrumentation
The PIC18F14Q40-E/REB's wide 1.8V to 5.5V operating range, low-power sleep modes, and integrated 12-bit ADC2 make it suitable for handheld battery-powered instruments such as digital multimeters, environmental monitors, and portable medical devices. The DMA engine wakes the CPU only when sensor data is ready, reducing average power consumption. The 16 KB FLASH accommodates calibration tables and user interface state machines. The 20-VQFN (3x3 mm) package enables thin, ergonomic product designs. Compared to higher-end Cortex-M0+ MCUs, the PIC18F14Q40-E/REB offers comparable peripherals at a lower unit cost.
Recommended
Home Appliance Control Board
The PIC18F14Q40-E/REB's combination of 16-bit PWM, 12-bit ADC2, CLC, and UART/SPI/I2C interfaces covers the I/O needs of home appliances such as washing machines, dishwashers, refrigerators, and microwave ovens. The -40 C to +125 C extended temperature range handles the thermal environment near motors and heaters. The integrated EEPROM stores user settings and fault logs without external memory. The DMA engine handles high-speed sensor sampling while the CPU runs the user interface. The 20-VQFN (3x3 mm) package fits compact control boards.
Recommended
Touch / Proximity Sensing Interface
The PIC18F14Q40-E/REB's 12-bit ADC with Computation (ADC2), Configurable Logic Cells (CLC), and DMA engine support Microchip's mTouch capacitive touch and proximity sensing firmware libraries without external components. The CLC peripheral generates the touch excitation waveform and processes the response without CPU intervention. The 1.8V to 5.5V supply supports battery-powered touch remotes and IoT wall switches. The 20-VQFN (3x3 mm) package enables ultra-thin touch panel designs. Compared to dedicated touch ICs, integrating the MCU allows custom gesture recognition and wireless connectivity on a single chip.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F14Q40-E/REB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F14Q40-I/REB | PIC18F14Q40-E/P | PIC18F16Q40-I/REB | PIC18F05Q41-E/ST | PIC18F06Q40-E/ST |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-VQFN (3x3 mm) | 20-VQFN (3x3 mm) - same | 20-PDIP - different footprint | 20-VQFN (3x3 mm) - same | 20-TSSOP - different footprint | 20-SSOP - different footprint |
| FLASH Memory | 16 KB | 16 KB | 16 KB | 32 KB | 8 KB | 8 KB |
| SRAM | 1 KB | 1 KB | 1 KB | 2 KB | 512 B | 512 B |
| Maximum CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| 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 |
| Operating Temperature | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +125 C (Extended) |
Key Differentiators
- Highest memory density in PIC18-Q40 family with 20-VQFN package (vs PIC18F06Q40-E/ST)
- Smallest footprint Q40 family member (vs PIC18F16Q40-I/REB)
- Extended temperature grade in VQFN (vs PIC18F14Q40-I/REB)
Design Notes
The 20-VQFN (3x3 mm) package uses an exposed thermal pad (EP, pin 20) that MUST be soldered to a PCB ground plane for both mechanical reliability and thermal performance. Estimated: at 64 MHz CPU speed with all peripherals active, the device draws approximately 10 mA at 5V. With theta_JA of approximately 40 C/W on a 4-layer JEDEC test board, the junction temperature rise is about 4 C above ambient, well within the -40 C to +125 C range. No external heatsink is required.
Place a 100 nF decoupling capacitor within 5 mm of the VDD pin (pin 18) and a bulk capacitor (10 uF) on the same power trace. For ADC2 accuracy, place a 10 uF + 100 nF capacitor pair on the AVDD supply if used separately. The Q40 family supports separate AVDD/VDD pins; tying them together with proper filtering improves ADC SNR by 2-3 dB. Avoid routing high-frequency digital signals under the analog pins to minimize crosstalk.
Do not exceed the absolute maximum VDD of 6.5V or the ESD rating of 2 kV HBM. Ensure the ICSP clock (RB6) and ICSP data (RB7) pins are not driven by external circuitry during programming, as contention can prevent successful device programming. For capacitive touch sensing, configure the mTouch library and run the touch calibration sequence at power-up to compensate for PCB parasitic capacitance. The device does NOT include a built-in brown-out reset disable bit by default; ensure BOR is enabled in the configuration words for reliable operation.
Compliance Information
RoHS and REACH compliance per Microchip product page. The -E suffix indicates extended temperature grade (-40 C to +125 C) but is NOT AEC-Q100 qualified; for automotive applications requiring AEC-Q100, contact Microchip for the automotive-grade part number.
