PIC18F16Q40T-I/REB - 64KB Flash 8-bit MCU, 20-VQFN | Microchip
MPN: PIC18F16Q40T-I/REB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.96 | $1.96 |
| 10 | $1.78 | $17.80 |
| 100 | $1.45 | $145.00 |
| 500 | $1.28 | $640.00 |
| 1,000 | $1.12 | $1,120.00 |
PIC18F16Q40T-I/REB Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, optimized for deterministic control loops, low power consumption, and small footprint. Within the broader semiconductor hierarchy, the PIC18 sits as an enhanced mid-range family between baseline PIC10/12/16 and the 16-bit dsPIC/PIC24 families, serving applications that need more peripherals and code space than entry-level MCUs but do not justify a Cortex-M0 device. PIC18F16Q40 specifically adds a 12-bit ADC with computation engine, two 8-bit DACs, 16-bit PWMs, DMA, CLC, and Peripheral Pin Select (PPS), positioning it as a strong fit for motor control, lighting, power conversion, and sensor readout designs.
Key features include 64 KB self-programmable Flash, 4 KB SRAM, 512 B EEPROM, 12-bit ADC with computation (ADCC), two 8-bit DACs, multiple 16-bit PWM channels, DMA, CLC, Peripheral Pin Select (PPS) for flexible pin mapping, and Microchip's eXtreme Low Power (XLP) modes for battery-driven designs. Connectivity is provided by I2C, SPI, and UART/USART peripherals, with standard PIC18 interrupt, brown-out reset, and watchdog timer support. The 20-pin VQFN (3x3 mm, REB suffix) package combines a small PCB footprint with an exposed thermal pad, simplifying thermal management and supporting the -40C to +85C industrial temperature range signified by the "I" code.
The "T" suffix in the part number denotes Tape and Reel packaging. The architecture uses Microchip's enhanced mid-range 8-bit core with a 16-bit instruction word, an internal 64 MHz oscillator, and a vectored interrupt controller. The ADCC engine performs averaging, oversampling, and threshold comparisons in hardware, offloading signal conditioning from the CPU and enabling deterministic sensor response in closed-loop applications.
Typical applications include BLDC and brushed motor control, LED lighting and color mixing, switch-mode power supply control loops, sensor signal conditioning with on-chip ADC computation, household appliances, and industrial IoT edge nodes. Its combination of small VQFN footprint and rich peripheral set makes it attractive where PCB area is constrained but analog and PWM resources are critical.
When designing with PIC18F16Q40, leverage Peripheral Pin Select (PPS) to map UART/SPI/I2C pins to convenient locations and use the ADCC hardware features rather than software averaging to reduce CPU load. For low-power designs, use the XLP sleep and Idle modes combined with DMA to wake only on peripheral events.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet alone, helping engineers compare this part against PIC18F15Q41, PIC18F14Q41, and same-family VQFN-pin-compatible Microchip variants.
Drop-in alternatives for PIC18F16Q40T-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 PIC18F16Q40T-I/REB (same form factor and footprint) — differing in ADC, DAC, DMA, EEPROM, PWM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F16Q40-I/REB
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F15Q41T-I/REB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F15Q41-I/REB
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC18F14Q41T-I/REB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC18F14Q41-I/REB
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F16Q40T-I/REB Maximum Ratings & Electrical Characteristics
| Core Processor | PIC |
| Core Size | 8-bit |
| Maximum CPU Speed | 64 MHz |
| Program Memory (FLASH) | 64 KB (64K x 8) |
| SRAM | 4 KB |
| EEPROM | 512 B |
| ADC | 12-bit ADC with Computation (ADCC) |
| DAC | 2x 8-bit DAC |
| PWM | 16-bit PWM modules |
| DMA | Yes (Direct Memory Access) |
| Configurable Logic Cells (CLC) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Operating Temperature Range | -40C to +85C (Industrial, "I") |
| Package | 20-pin VQFN (3x3 mm, REB), exposed pad |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel ("T" suffix) |
| RoHS Status | Compliant |
PIC18F16Q40T-I/REB Pin Configuration
| Pin 1 | RA0/ANA0 — Bidirectional I/O / analog input (PPS-mappable) |
| Pin 2 | RA1/ANA1 — Bidirectional I/O / analog input (PPS-mappable) |
| Pin 3 | RA2/ANA2 — Bidirectional I/O / analog input (PPS-mappable) |
| Pin 4 | RA3/ANA3 — Bidirectional I/O / analog input (PPS-mappable) |
| Pin 5 | RA4/ANA4 — Bidirectional I/O / analog input (PPS-mappable) |
| Pin 6 | RA5/ANA5 — Bidirectional I/O / analog input (PPS-mappable) |
| Pin 7 | RA6/OSC2 — I/O / oscillator output |
| Pin 8 | RA7/OSC1 — I/O / oscillator input |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage |
| Pin 11 | RB0/INT0 — I/O / external interrupt 0 |
| Pin 12 | RB1/INT1 — I/O / external interrupt 1 |
| Pin 13 | RB2 — Bidirectional I/O (PPS-mappable) |
| Pin 14 | RB3 — Bidirectional I/O (PPS-mappable) |
| Pin 15 | RB4 — Bidirectional I/O (PPS-mappable) |
| Pin 16 | RB5 — Bidirectional I/O (PPS-mappable) |
| Pin 17 | RB6/ICSPCLK — I/O / ICD clock (PPS-mappable) |
| Pin 18 | RB7/ICSPDAT — I/O / ICD data (PPS-mappable) |
| Pin 19 | RC0 — Bidirectional I/O (PPS-mappable) |
| Pin 20 | RC1 — Bidirectional I/O (PPS-mappable) |
Typical Applications
PIC18F16Q40T-I/REB is suitable for 6 applications: BLDC and Brushed DC Motor Control, LED Lighting and Color Mixing Drivers, Switch-Mode Power Supply (SMPS) Control, Industrial Sensor Signal Conditioning, Household Appliance Control Boards, Industrial IoT Edge Nodes.
BLDC and Brushed DC Motor Control
The PIC18F16Q40T-I/REB fits BLDC and brushed DC motor control because its 64 MHz core, 16-bit PWMs, and 12-bit ADCC with computation can sample current and back-EMF, then drive FET bridges with deterministic timing. The ADCC's hardware averaging and oversampling reduce CPU load while preserving control-loop bandwidth, which is essential at high PWM frequencies. Peripheral Pin Select (PPS) lets the designer remap PWM outputs to convenient I/O pins, easing PCB layout of three-phase bridges. Compared with larger PIC18F46K40 designs, this part cuts PCB area by more than half while retaining DMA-driven sensor reads and low-latency interrupt response. Power dissipation stays low because the 64 MHz core enters Idle or Sleep via XLP modes between commutation events.
Recommended
LED Lighting and Color Mixing Drivers
The PIC18F16Q40T-I/REB is well suited to LED drivers that combine constant-current regulation, color-temperature mixing, and DMX or wireless control. Its two 8-bit DACs generate analog references for current loops, while the 16-bit PWMs produce high-resolution dimming that avoids visible flicker at low duty cycles. The 64 KB Flash stores lighting curves, gamma tables, and protocol stacks for DALI, DMX512, or BLE-adjacent command parsers. XLP low-power modes keep standby consumption under a few microamps, important for battery-backed emergency luminaires. The 3x3 mm VQFN footprint enables integration inside the lamp base or driver can, and the exposed thermal pad helps dissipate the small but non-zero MCU dissipation.
Recommended
Switch-Mode Power Supply (SMPS) Control
For digital control of buck, boost, and flyback converters, the PIC18F16Q40T-I/REB provides 16-bit PWMs, DMA-driven current-sense sampling, and a 12-bit ADCC capable of multi-MHz sampling with hardware averaging. The Configurable Logic Cells (CLC) implement fast hardware comparators and trigger logic without CPU intervention, dramatically reducing feedback-loop latency. Peripheral Pin Select (PPS) lets the user route PWM outputs to any available I/O, simplifying PCB routing of high-side/low-side FET drives. Compared with traditional analog UC3842-style loops, this part enables programmable soft-start, adaptive dead-time, and telemetry over UART. The industrial -40C to +85C range covers most indoor and outdoor SMPS deployments.
Recommended
Industrial Sensor Signal Conditioning
The PIC18F16Q40T-I/REB excels at conditioning analog sensor signals thanks to its 12-bit ADCC with computation that handles oversampling, averaging, and threshold comparisons in hardware. Up to two 8-bit DACs provide excitation or bias outputs for bridge sensors, RTDs, or thermistor references. DMA moves conversion results into RAM without CPU intervention, freeing cycles for communication stacks over I2C, SPI, or UART. The Configurable Logic Cells (CLC) implement custom digital filters or window comparators on the fly. The 20-pin VQFN (3x3 mm) package allows the MCU to sit directly next to the sensor, minimizing analog trace length and noise pickup.
Recommended
Household Appliance Control Boards
The PIC18F16Q40T-I/REB is a strong fit for washing machines, dishwashers, ovens, and small kitchen appliances where a compact MCU must drive relays, read user inputs, run a small display, and handle safety monitoring. Its 4 KB SRAM supports UI state machines and protocol buffers, while the 64 KB Flash stores menus and fault logs. The 12-bit ADCC reads temperature, level, and motor current sensors with hardware averaging. PPS allows designers to assign UART, SPI, or I2C to pins that fit the board outline, avoiding costly PCB re-spins. The industrial temperature range and RoHS compliance meet household appliance regulatory requirements.
Recommended
Industrial IoT Edge Nodes
The PIC18F16Q40T-I/REB powers compact IIoT edge nodes that aggregate sensor data and forward it over UART, SPI, or I2C to wireless co-processors. Its XLP low-power modes, with sleep currents in the microamp range, make it suitable for battery- or energy-harvesting deployments. DMA and CLC handle autonomous data acquisition without waking the core, preserving energy. The 20-pin VQFN allows the MCU plus a wireless module and a sensor to fit in less than 1 square inch of PCB. Industrial temperature range and robust on-chip peripherals make it a low-cost alternative to Cortex-M0 edge devices for sub-$5 BOM nodes.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F16Q40T-I/REB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F16Q40-I/REB | PIC18F15Q41T-I/REB | PIC18F15Q41-I/REB | PIC18F14Q41T-I/REB | PIC18F14Q41-I/REB |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin VQFN (3x3 mm, REB), exposed pad | 20-pin VQFN (3x3 mm, REB) - same | 20-pin VQFN (3x3 mm, REB) - same | 20-pin VQFN (3x3 mm, REB) - same | 20-pin VQFN (3x3 mm, REB) - same | 20-pin VQFN (3x3 mm, REB) - same |
| Core / Speed | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz | 8-bit PIC18 / 64 MHz |
| ADC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC |
| DAC / PWM | 2x 8-bit DAC / 16-bit PWM | 2x 8-bit DAC / 16-bit PWM | 2x 8-bit DAC / additional PWM | 2x 8-bit DAC / additional PWM | 2x 8-bit DAC / 16-bit PWM | 2x 8-bit DAC / 16-bit PWM |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging Format | Tape & Reel ("T") | Tray (no "T") | Tape & Reel ("T") | Tray (no "T") | Tape & Reel ("T") | Tray (no "T") |
Key Differentiators
- Highest Flash density in PIC18-Q40 family at 64 KB in 20-pin VQFN (vs PIC18F15Q41T-I/REB)
- 12-bit ADCC with hardware computation (vs PIC18F14K22T-I/SO)
- Direct Memory Access (DMA) and Configurable Logic Cells (CLC) (vs PIC18F14Q40T-I/SO (if used as a reference))
Design Notes
Estimated: At 64 MHz CPU clock with all peripherals active in a typical 3.3V application, the PIC18F16Q40T-I/REB core dissipation is well under 100 mW. The 20-pin VQFN (3x3 mm) package exposes its central pad, which should be soldered to a copper pour of at least 25 mm^2 to keep junction temperature rise below 20 C above ambient. For continuous high-FCPU designs, expand the copper area or add thermal vias to the inner plane.
Place decoupling capacitors (100 nF ceramic plus 1-10 uF bulk) within 3 mm of each VDD/VSS pair. Keep the ICSP connector traces (RB6/ICSPCLK, RB7/ICSPDAT, MCLR) accessible or routed to a 0.1" header so that in-circuit debugging with PICkit or MPLAB ICD remains possible after PCB assembly. The exposed thermal pad must be soldered to a continuous copper pour for electrical ground and thermal relief.
Do not assume peripheral pins are at fixed locations - the PIC18F16Q40T-I/REB uses Peripheral Pin Select (PPS) to map digital peripherals to physical I/O. Failure to configure PPS in firmware is a common cause of "dead UART" or "silent SPI" symptoms. Always verify the MCLR pin has a proper pull-up (typically 10 kohm) to avoid unintended resets, and ensure the configuration bits select the desired oscillator mode before locking the device.
Estimated: For SPI buses above 8 MHz in this MCU, keep trace lengths under 25 mm and place a 33 ohm series resistor near the driver to dampen reflections. The I2C peripheral in this PIC18 supports Standard, Fast, and Fast-Plus modes; for Fast-Plus (1 MHz) ensure external pull-ups are sized to achieve rise times under 300 ns with the total bus capacitance. Add a 4.7 kohm pull-up on SDA and SCL if the master is far from the device.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 grade not declared - this part is targeted at industrial/consumer applications, not automotive. Choose PIC18F16Q40-E/REB for -40C to +125C extended range.
