PIC18F14Q40-I/REB - 8-Bit MCU, 16KB Flash, 64MHz | Microchip
MPN: PIC18F14Q40-I/REB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.45 | $14.50 |
| 100 | $1.18 | $118.00 |
| 500 | $0.96 | $480.00 |
| 1,000 | $0.84 | $840.00 |
| 3,000 | $0.71 | $2,130.00 |
PIC18F14Q40-I/REB Overview
An 8-bit microcontroller (MCU) is a compact, single-chip processor that integrates a CPU, program memory (Flash), data memory (RAM), non-volatile storage (EEPROM), and a configurable set of analog and digital peripherals. PIC18 MCUs sit in the broader hierarchy of microcontrollers -> microprocessors -> semiconductors -> integrated circuits, and are widely used where deterministic interrupt response, low power, and rich analog integration are valued over raw compute throughput.
Key features include the 12-bit ADC2 engine with automated averaging, filtering, threshold detection, and sleep-mode operation, which offloads the CPU from measurement loops. Two 8-bit DACs provide reference voltages or waveform generation without external components. The 16-bit PWM with complementary outputs (with dead-band control) simplifies digital power, lighting, and motor control. Direct Memory Access (DMA) and a system bus arbiter allow autonomous data movement between peripherals and memory.
Typical applications include real-time control in compact form factors, sensor signal conditioning with on-chip ADC2, LED lighting and smart dimming (16-bit PWM), automotive and LIN-bus nodes, and IoT edge devices powered from cells or energy harvesters. A 20-VQFN (3x3) footprint makes the part attractive for space-constrained PCB layouts such as wearables and disposable medical patches.
When designing with the PIC18F14Q40-I/REB, place decoupling capacitors (100 nF plus 1-10 uF bulk) within 5 mm of the VDD pins and connect the exposed pad to a low-impedance ground pour for thermal dissipation. Configure unused I/O as outputs low to minimize current draw, and use the XLP sleep modes (nanoWatt) to extend battery life in duty-cycled sensor applications. MPLAB X IDE with XC8 compiler is the recommended toolchain.
This page consolidates distributor pricing, drop-in same-package alternatives, and engineering design guidance not found in the manufacturer datasheet alone, helping procurement and design engineers evaluate the PIC18F14Q40-I/REB against the rest of the PIC18-Q40 family in a single view.
Drop-in alternatives for PIC18F14Q40-I/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-I/REB (same form factor and footprint) — differing in ADC, DAC, Package, Core Architecture, PWM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F14Q40-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F14Q40T-I/REB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F14Q40-E/REB
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.68 / Unit
View Datasheet →PIC18F04Q40-I/ST
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.82 / Unit
View Datasheet →PIC18F05Q41T-I/ST
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.74 / Unit
View Datasheet →PIC18F14Q40-I/REB Maximum Ratings & Electrical Characteristics
| Core | PIC18 (8-bit RISC) |
| Architecture | Harvard, modified RISC |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Data RAM | 1 KB |
| EEPROM | 512 bytes |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage | 1.8 V to 5.5 V |
| ADC | 12-bit ADC2 with Computation |
| DAC | 2 x 8-bit |
| PWM | 16-bit with dual independent outputs |
| Digital I/O Pins | 18 |
| Communication Interfaces | UART (LIN/DMX/DALI), SPI, I2C |
| DMA | Yes |
| Low-Power Technology | XLP (nanoWatt) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 20-VQFN (3x3 mm) with exposed pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F14Q40-I/REB Pin Configuration
| Pin 1 | RA0/ICDDAT — Analog input AN0 / programming data |
| Pin 2 | RA1/ICSCLK — Analog input AN1 / programming clock |
| Pin 3 | RA2 — Analog input AN2 / DAC1 output |
| Pin 4 | RA3 — Analog input AN3 / DAC2 output |
| Pin 5 | RA4 — Digital I/O with weak pull-up |
| Pin 6 | RA5 — Digital I/O |
| Pin 7 | VDD — Power supply (1.8V-5.5V) |
| Pin 8 | VSS — Ground |
| Pin 9 | RB4 — Digital I/O, PWM output |
| Pin 10 | RB5 — Digital I/O, PWM output |
| Pin 11 | RB6/ICSPCLK — Digital I/O / ICSP clock |
| Pin 12 | RB7/ICSPDAT — Digital I/O / ICSP data |
| Pin 13 | RC0 — Digital I/O / analog input AN4 |
| Pin 14 | RC1 — Digital I/O / analog input AN5 |
| Pin 15 | RC2 — Digital I/O / analog input AN6 |
| Pin 16 | RC3 — Digital I/O / analog input AN7 |
| Pin 17 | RC4 — Digital I/O / SDA |
| Pin 18 | RC5 — Digital I/O / SCL |
| Pin 19 | RC6 — Digital I/O / TX |
| Pin 20 | RC7 — Digital I/O / RX |
Typical Applications
PIC18F14Q40-I/REB is suitable for 6 applications: IoT Sensor Edge Node, Automotive LIN Bus Node, LED Lighting & Smart Dimming, Industrial Sensor Signal Conditioning, Compact Medical Wearable Patches, Consumer Appliance UI & Motor Sub-Node.
IoT Sensor Edge Node
The PIC18F14Q40-I/REB's 12-bit ADC2 with Computation engine and XLP nanoWatt technology make it ideal for battery-powered IoT sensor hubs at the network edge. ADC2 runs automated averaging, threshold detect, and sleep-mode conversions without waking the CPU, so a temperature or battery monitor can sample once per second while consuming single-digit uA average. The 16 KB Flash holds a state-machine plus secure bootloader, while 1 KB RAM handles small protocol buffers over UART/SPI/I2C. At 1.8-5.5 V supply, the same board works from a CR2032 cell or a 5 V industrial rail. The 3x3 mm VQFN footprint fits inside wearables, disposable patches, and energy-harvested wireless sensors, making the REB package a strong fit when PCB area is critical.
Recommended
Automotive LIN Bus Node
The PIC18F14Q40-I/REB family includes hardware LIN support in its UART peripheral, providing automatic handling of break/sync fields and checksum generation per LIN 1.3/2.0. The 64 MHz CPU and 16-bit PWM (dual outputs with dead-band) suit automotive body electronics such as seat controllers, mirror modules, and ambient lighting, where 18 I/O pins cover switch scan + LED drive + motor half-bridge control. The 1.8-5.5 V operating range tolerates 12 V automotive rail drops during cranking via an external LDO. Compared with 32-bit Cortex-M alternatives, the PIC18's deterministic interrupt latency simplifies ASIL-related timing analysis. For designs that must reach +125 C, choose the PIC18F14Q40-E/REB variant.
Recommended
LED Lighting & Smart Dimming
The PIC18F14Q40-I/REB's 16-bit PWM with dual independent outputs and configurable dead-band enable precision LED dimming up to 16-bit resolution at frequencies high enough to avoid flicker (above 1 kHz). Two integrated 8-bit DACs generate reference voltages or analog control outputs for tunable-white or RGB controllers. DMA moves PWM duty updates from RAM while the CPU runs the lighting protocol stack (DMX-512, DALI, or wireless bridge), freeing cycles for user-experience features. The compact 20-VQFN 3x3 mm footprint fits inside MR16 bulbs and down-light drivers; XLP sleep below 100 nA reduces standby power to meet Energy Star and Ecodesign limits for connected luminaires.
Recommended
Industrial Sensor Signal Conditioning
Industrial sensor-conditioning designs benefit from the PIC18F14Q40-I/REB's 12-bit ADC2 with up to 200 ksps sampling, integrated differential measurement, and on-chip computation engine for moving averages and accumulator math. Combined with two 8-bit DACs for excitation sources, the MCU provides a fully integrated analog front-end for thermocouple, strain-gauge, or process-current (4-20 mA) sensor boards. The 1.8-5.5 V supply permits loop-powered 4-20 mA transmitter operation. Hardware SPI/I2C/UART accelerate connectivity to HMI displays and field-bus gateways. The 3x3 mm QFN footprint and 85 C industrial rating suit densely populated DIN-rail analog modules.
Recommended
Compact Medical Wearable Patches
Medical adhesive patches and continuous-glucose-monitor (CGM) form factors demand an MCU under 3x3 mm that can run on a coin cell for two weeks. The PIC18F14Q40-I/REB delivers: XLP deep-sleep at sub-100 nA, 1.8 V minimum supply compatible with primary Li-MnO2 chemistries, and an integrated 12-bit ADC2 that performs threshold detection without CPU intervention. The two 8-bit DACs drive low-side current loops for bio-sensor stimulation, while DMA copies ADC samples into RAM during the rare active phase to maximize battery life. The 16-bit PWM can also drive an acoustic or haptic alarm at the end of life. Medical designs must validate IEC 60601-1/EMI per the OEM's risk file.
Recommended
Consumer Appliance UI & Motor Sub-Node
For consumer white goods and HVAC indoor units that need a small UI/motor sub-node, the PIC18F14Q40-I/REB supplies 18 I/O to drive a segment LCD booster, capacitive-touch I/O extensions, and a low-power BLDC or stepper motor via the 16-bit PWM. Its 64 MHz performance handles user-interface state machines and motor commutation tables simultaneously, while DMA offloads repetitive timer-driven housekeeping. UART-based protocols (DMX, DALI, Modbus RTU on RS-485) are supported natively for appliance-network integration. The -40 C to +85 C industrial rating supports kitchen and laundry environments; the small 20-VQFN 3x3 mm package fits main-control board subsections.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F14Q40-I/REB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F14Q40-I/SS | PIC18F14Q40T-I/REB | PIC18F14Q40-E/REB |
|---|---|---|---|---|
| Package | 20-VQFN (3x3 mm) with exposed pad | 20-SSOP | 20-VQFN (3x3) - same | 20-VQFN (3x3) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash / RAM / EEPROM | 16 KB / 1 KB / 512 B | 16 KB / 1 KB / 512 B (same) | 16 KB / 1 KB / 512 B (same) | 16 KB / 1 KB / 512 B (same) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) |
| Max CPU Frequency | 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 |
| Automotive / AEC-Q100 | No (industrial grade) | No | No | No (extended industrial only) |
| DMA Controller | Yes | Yes | Yes | Yes |
Key Differentiators
- Smallest PIC18 Q40 package footprint with full Q40 feature set (vs PIC18F14Q40-I/SS)
- Extended temperature option on the same Q40 die (vs PIC18F14Q40-I/REB (industrial))
- Tape-and-reel packaging code for production assembly (vs PIC18F14Q40-I/REB)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of each VDD pin (pin 7) and a single 1-10 uF bulk capacitor at the board level. The exposed thermal pad (pin 21) is electrically ground and must be soldered to a low-impedance ground pour with at least 6-9 thermal vias to the inner/bottom ground plane. A broken or missing ground pad causes roughly 2x junction-to-ambient thermal resistance, compromising reliability at >50 mW dissipation. For sensitive analog sampling, route analog ground and digital ground as separate polygons joined at one point beneath the IC.
Estimated: At VDD=3.3 V, CPU active @ 64 MHz = approx 8 mA per Microchip datasheet curves; idle = 1.4 mA. Deep-sleep XLP with ADC2 disabled falls below 1 uA. If your application averages >100 uA, audit digital I/O configurations - any input left floating >100 uA leakage can multiply by 18 I/O pins. Use internal weak pull-ups on unused pins and configure them as outputs-low to minimize quiescent current. Also note that 16-bit PWM frequency (F_PWM) = F_OSC / (2 * PTMR * (PR2+1)) - confirm PTMR prescaler and PR2 setting produce the target >1 kHz PWM frequency for LED dimming.
The 12-bit ADC2 with Computation achieves roughly 12 ENOB at 100 ksps when source impedance is below 1 kohm. Sensors with >10 kohm source impedance need an op-amp buffer (e.g., MCP6001) to avoid ADC charge-sharing errors. Use the post-adc Computation engine (oversampling mode) to gain an extra 2 effective bits - average 16 samples in firmware/ADC2 and read a 14-bit result for thermocouple and bridge-type sensors without external noise filtering.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Standard PIC18F14Q40-I/REB is industrial grade (-40 to +85 C) - not AEC-Q100; choose AEC-Q100-graded PIC18 variants if automotive qualification is required.
