PIC18F16Q40-E/SO - 8-Bit 64MHz 64KB Flash MCU | Microchip
MPN: PIC18F16Q40-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.89 | $18.90 |
| 100 | $1.65 | $165.00 |
| 500 | $1.42 | $710.00 |
| 1,000 | $1.2 | $1,200.00 |
PIC18F16Q40-E/SO Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory (typically Flash), working RAM, and a rich set of peripherals such as timers, ADC/DAC, communication interfaces, and interrupt controllers. PIC18 microcontrollers use an 8-bit modified Harvard RISC architecture with a 16-bit instruction word, balancing deterministic interrupt response, low power consumption, and easy in-circuit reprogrammability. Within the broader taxonomy, the PIC18F16Q40 belongs to the 8-bit MCU family, which itself sits under the category of microcontrollers -> integrated circuits -> semiconductors.
Key features of the PIC18F16Q40 include the on-chip 12-bit ADC2 with automated math and averaging functions, dual 8-bit DAC outputs, up to four 16-bit PWM channels with complementary and dead-band modes, hardware DMA for offloading CPU data movement, and CLC blocks that implement glue logic without external gates. The device also exposes peripherals such as I2C, SPI, UART with LIN, and configurable interrupt-on-change I/O, all in a 20-pin SOIC footprint.
The Q40 silicon pairs an 8-bit PIC18 core running up to 64 MHz with CIP (Core Independent Peripherals) such as CLC, PWM, NCO, and DMA, enabling closed-loop control tasks such as sensor conditioning, LED driving, and motor commutation to run largely without CPU intervention. This frees the CPU to handle communications, application logic, or safety checks, while the integrated peripherals handle time-critical signal chains.
Typical applications include IoT edge sensor nodes, BLDC and DC motor control, LED lighting controllers, battery-powered consumer devices, HVAC control boards, and industrial sensor-interface modules. The wide 1.8 V to 5.5 V supply range also supports direct connection to single-cell Li-ion or two-cell alkaline packs.
When designing with this part, allocate the 20-pin SOIC budget carefully: many signals are multiplexed onto the same pin, so the PPS (Peripheral Pin Select) feature should be planned early. Always check the MPLAB X IDE project settings and ensure the configured oscillator and ICD pins match the board layout.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC18F16Q40-E/SO — 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 PIC18F16Q40-E/SO (same form factor and footprint) — differing in Package, ADC, DAC, PWM, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F15Q40-E/SO
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC18F16Q41-I/SO
✅ Drop-In✓ In Stock
$1.2 / Unit
View Datasheet →PIC18F14K50-I/SO
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC18F14Q40-E/SO
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F18444-I/SO
✅ Drop-In✓ In Stock
$0.68 / Unit
View Datasheet →PIC18F16Q40-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC18 (modified Harvard RISC) |
| Program Memory (Flash) | 64 KB (64K x 8) |
| SRAM | 4 KB |
| EEPROM | 512 bytes |
| Maximum CPU Frequency | 64 MHz |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| ADC | 12-bit ADC with Computation (ADC2) |
| DAC | 8-bit DAC (dual) |
| PWM | 16-bit PWM (multiple channels) |
| DMA Channels | Yes (hardware Direct Memory Access) |
| Configurable Logic Cells (CLC) | Yes |
| Operating Temperature | -40C to +125C (E suffix, industrial) |
| Package | 20-pin SOIC (SO) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F16Q40-E/SO Pin Configuration
| Pin 1 | RA0/AN0 — Bidirectional I/O / ADC input channel 0 |
| Pin 2 | RA1/AN1 — Bidirectional I/O / ADC input channel 1 |
| Pin 3 | RA2/AN2 — Bidirectional I/O / ADC input channel 2 |
| Pin 4 | RA3/AN3 — Bidirectional I/O / ADC input channel 3 |
| Pin 5 | RA4 — Bidirectional I/O |
| Pin 6 | RA5 — Bidirectional I/O |
| Pin 7 | RA6 — Bidirectional I/O |
| Pin 8 | RA7 — Bidirectional I/O |
| Pin 9 | VSS — Ground reference |
| Pin 10 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 11 | RB0/INT — Bidirectional I/O / external interrupt |
| Pin 12 | RB1 — Bidirectional I/O |
| Pin 13 | RB2 — Bidirectional I/O |
| Pin 14 | RB3 — Bidirectional I/O |
| Pin 15 | RB4 — Bidirectional I/O |
| Pin 16 | RB5 — Bidirectional I/O |
| Pin 17 | RB6/ICSCLK — Bidirectional I/O / ICD clock |
| Pin 18 | RB7/ICSDAT — Bidirectional I/O / ICD data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
Typical Applications
PIC18F16Q40-E/SO is suitable for 6 applications: IoT Edge Sensor Node, BLDC and DC Motor Control, LED Lighting Controller, Battery-Powered Consumer Device, HVAC and Building Automation Sensor Module, Industrial Sensor Interface Board.
IoT Edge Sensor Node
The PIC18F16Q40-E/SO is well-matched to IoT edge sensor nodes because its 1.8 V to 5.5 V supply supports direct connection to single-cell Li-ion or two-cell alkaline packs, while the 12-bit ADC2 with Computation offloads signal conditioning from the CPU. Hardware DMA and CLC peripherals handle continuous sensor sampling in the background, freeing the 64 MHz CPU to manage Modbus, BLE command layers, or LoRaWAN MAC stacks stored within 64 KB Flash. Compared with switching-regulator-based MCUs, the wide supply tolerance simplifies power-tree design and reduces BOM cost.
Recommended
BLDC and DC Motor Control
The PIC18F16Q40-E/SO's 16-bit PWM channels with complementary outputs, programmable dead-band, and DMA-driven update make it suitable for sensored or sensorless BLDC and brushed DC motor control. The 64 MHz CPU core executes FOC or trapezoidal commutation algorithms within the 64 KB Flash budget, while CLC blocks combine PWM and current-sense signals without external glue logic. Compared with discrete PWM-controller solutions, this part reduces PCB area and enables firmware-driven tuning across motor variants.
Recommended
LED Lighting Controller
In LED lighting drivers, the PIC18F16Q40-E/SO drives 16-bit PWM channels for smooth dimming and color-mixing of RGBW or tunable-white strings, while the dual 8-bit DACs can output analog reference voltages for constant-current driver ICs. Hardware DMA updates PWM duty cycles without CPU jitter, ensuring flicker-free dimming even at low duty cycles. The 1.8 V to 5.5 V supply accepts direct rectified mains-derived rails, simplifying driver-board design.
Recommended
Battery-Powered Consumer Device
The PIC18F16Q40-E/SO's wide 1.8 V to 5.5 V operating range and low-power modes suit battery-powered consumer products such as smart locks, fitness wearables, and remote controls. The 64 KB Flash accommodates BLE or proprietary RF command stacks, and the 4 KB SRAM buffers sensor data between deep-sleep wake events. The DMA and CLC blocks can wake the CPU only on relevant edge events, extending battery life.
Recommended
HVAC and Building Automation Sensor Module
In HVAC and building automation, the PIC18F16Q40-E/SO reads temperature, humidity, and CO2 sensors through its 12-bit ADC2 and communicates over UART, I2C, or SPI to building controllers. The 64 KB Flash supports BACnet, Modbus, or proprietary protocols, while the 512-byte EEPROM stores calibration constants across power cycles. The industrial -40C to +125C temperature range handles unconditioned plant-floor environments.
Recommended
Industrial Sensor Interface Board
The PIC18F16Q40-E/SO's combination of 12-bit ADC, dual 8-bit DAC, 16-bit PWM, and DMA makes it a flexible industrial sensor interface MCU. It can implement 4-20 mA loop interfaces, bridge sensors, RTD conditioning, or strain-gauge amplification alongside CIP peripherals. Source: Microchip PIC18-Q40 product page. Compared with legacy PIC16F variants, the Q40 brings modern CIP blocks that reduce external components.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F16Q40-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F15Q40-E/SO | PIC18F16Q41-I/SO | PIC18F14K50-I/SO | PIC18F14Q40-E/SO | PIC16F18444-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SOIC (SO) | 20-pin SOIC (SO) - same | 20-pin SOIC (SO) - same | 20-pin SOIC (SO) - same | 20-pin SOIC (SO) - same | 20-pin SOIC (SO) - same |
| Core Architecture | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC16 (different instruction set) |
| Maximum CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 48 MHz | 64 MHz | 32 MHz |
| Flash Program Memory | 64 KB | 32 KB | 64 KB | 16 KB | 16 KB | 14 KB |
| SRAM | 4 KB | 2 KB | 4 KB | 2 KB | 1 KB | 1 KB |
| EEPROM | 512 bytes | 256 bytes | 512 bytes | 256 bytes | 256 bytes | 256 bytes |
| USB Support | No | No | No | Yes (USB 2.0 Full-Speed) | No | No |
| On-Chip Op-Amps | No | No | Yes | No | No | No |
| Supply 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 |
Key Differentiators
- Highest memory density in the 20-pin SOIC PIC18-Q40 family (vs PIC18F15Q40-E/SO)
- Modern CIP peripheral set without USB overhead (vs PIC18F14K50-I/SO)
- Lower-memory sibling for cost-sensitive designs (vs PIC18F14Q40-E/SO)
Design Notes
Estimated: Decoupling strategy for the PIC18F16Q40-E/SO follows the Microchip PIC18F06/16Q40 datasheet guidance. Place a 100 nF ceramic bypass capacitor as close as possible to each VDD pin (pins 10 and 20), with a single 10 uF bulk capacitor near the MCU. For ADC accuracy, add a small ferrite bead or resistor between the analog and digital VDD rails if separate analog supplies are not used. The 1.8 V to 5.5 V supply range simplifies direct Li-ion or alkaline battery connection, but the MCU's ADC VREF should be tied to a clean reference for best 12-bit performance.
The 20-pin SOIC footprint requires careful pin planning because the PIC18F16Q40 multiplexes many peripherals onto shared pins. Use the MPLAB X IDE Pin Manager and PPS (Peripheral Pin Select) early in the design to map UART, SPI, I2C, PWM, and ADC channels to physical pins before committing to layout. Place the ICSP/ICD pins (RB6/RB7) on header pads so that in-circuit debugging remains possible even in production. Keep traces to the 32.768 kHz or HF crystal short and surround with a ground pour to reduce EMI.
Estimated: Common pitfalls when using the PIC18F16Q40-E/SO include leaving the MCLR pin floating (must be tied to VDD via a 10 kohm resistor for normal operation, or directly for in-circuit programming), exceeding 5.5 V on any I/O pin, and ignoring the maximum current per I/O pin (per I/O ~25 mA, per VDD/VSS ~200 mA) when driving LED arrays. Also, ensure the configuration bits are set for the correct oscillator mode (HFINTOSC, HS, or external crystal) before code generation, because a misconfigured oscillator will appear as a bricked board on first power-up.
Compliance Information
RoHS compliant per Microchip product page and distributor listings. Industrial-grade (E suffix) - not AEC-Q100 qualified; not designed for automotive safety-critical applications. Conflict-minerals policy: Microchip publishes a current CMRT/EMRT and reports compliance.
