PIC18F16Q41-I/SO - 8-Bit MCU, 64KB Flash, 64MHz, 20-SOIC | Microchip
MPN: PIC18F16Q41-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.34 | $2.34 |
| 10 | $2.07 | $20.70 |
| 100 | $1.81 | $181.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.39 | $1,390.00 |
| 3,000 | $1.2 | $3,600.00 |
PIC18F16Q41-I/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, typically used in cost-sensitive embedded designs that do not require 32-bit performance. Within the broader taxonomy it sits under microcontroller -> embedded processor -> semiconductor device, and is best understood as a system-on-chip combining CPU core, non-volatile program memory (Flash), volatile working memory (SRAM), EEPROM for parameter storage, and a peripheral set tuned to a target application space.
Key features of the PIC18F16Q41 include a 12-bit ADC with Computation (ADCC) that automates capacitive voltage divider (CVD) touch sensing, two 8-bit DACs with output buffering, an on-chip operational amplifier for signal conditioning, a 16-bit PWM with multiple complementary outputs, and Core Independent Peripherals (CIPs) such as CLC, NCO and 16-bit timer. The integrated op-amp eliminates an external analog front-end stage, which both reduces BOM cost and shrinks PCB area in sensor and motor-control designs.
The architecture uses a Harvard RISC core with a modified instruction set and a 16-bit instruction word, giving predictable single-cycle execution except for program branches. The ADCC subsystem offloads averaging, oversampling and threshold comparison from the CPU, freeing core cycles for communication and supervisory tasks. Memory is partitioned with separate Flash and EEPROM buses, supporting >100k erase/write cycles on program memory and 1M cycles on EEPROM.
Typical applications are capacitive-touch user interfaces, low-cost sensor signal conditioning, LED lighting controllers and small brushed-DC motor or fan controllers. The 20-SOIC footprint simplifies hand-prototyping and rework versus QFN, while still offering the analog density needed for sensor signal chains.
When using this part, allocate dedicated PCB area for the ICSP header so that in-circuit debugging and field firmware updates remain possible after board assembly. The op-amp output stage is not rail-to-rail, so biasing must respect the input common-mode and output swing limits documented in the datasheet electrical characteristics table.
This page compiles distributor pricing, drop-in same-package alternatives from the PIC18-Q41 family and the broader PIC18F line, plus design notes that extend beyond what is printed in the manufacturer datasheet - intended to help engineers shorten component-selection time.
Drop-in alternatives for PIC18F16Q41-I/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 PIC18F16Q41-I/SO (same form factor and footprint) — differing in ADC, DAC, PWM, Program Memory (Flash), Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F15Q41-I/SO
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC18F14Q41-I/SO
✅ Drop-In✓ In Stock
$1.52 / Unit
View Datasheet →PIC18F16Q40-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F15Q41-I/P
✅ Drop-In✓ In Stock
$1.35 / Unit
View Datasheet →PIC18F16Q41-E/SO
✅ Drop-In✓ In Stock
$1.48 / Unit
View Datasheet →PIC18F16Q41-I/SO Maximum Ratings & Electrical Characteristics
| No specifications available |
PIC18F16Q41-I/SO Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.3 V to 5.5 V) |
| Pin 2 | RA5 — Digital I/O or analog input |
| Pin 3 | RA4 — Digital I/O or analog input |
| Pin 4 | RA3/MCLR — Master Clear (reset) input or digital I/O |
| Pin 5 | RC5 — Digital I/O |
| Pin 6 | RC4 — Digital I/O |
| Pin 7 | RC3 — Digital I/O or analog input |
| Pin 8 | RC2 — Digital I/O or analog input |
| Pin 9 | RC1 — Digital I/O |
| Pin 10 | RC0 — Digital I/O |
| Pin 11 | VSS — Ground reference |
| Pin 12 | RC6/ICSPDAT — ICSP data or digital I/O |
| Pin 13 | RC7/ICSPCLK — ICSP clock or digital I/O |
| Pin 14 | RB7 — Digital I/O or analog input |
| Pin 15 | RB6 — Digital I/O or analog input |
| Pin 16 | RB5 — Digital I/O or analog input |
| Pin 17 | RB4 — Digital I/O or analog input |
| Pin 18 | RB3 — Digital I/O or analog input |
| Pin 19 | RB2 — Digital I/O or analog input |
| Pin 20 | RB1/RA1 — Digital I/O or analog input |
Typical Applications
PIC18F16Q41-I/SO is suitable for 6 applications: Capacitive Touch User Interface, Sensor Signal Conditioning and IoT Edge Node, LED Lighting and Color Control, Brushed-DC Motor and Fan Controller, Industrial Control and HMI Front End, Small Home Appliance and Consumer Embedded Control.
Capacitive Touch User Interface
The PIC18F16Q41-I/SO is one of Microchip's mTouch-capable parts, with a 12-bit ADCC that automates capacitive voltage divider (CVD) charge-transfer sequencing across sensor electrodes. Average, oversampling and threshold-compare processing happen in hardware, so a 12-key touch panel plus slider can be scanned with minimal CPU cycles left over for LED feedback and host communication. Combined with the on-chip op-amp for self-signal conditioning and the 16-bit PWM for haptic/LED brightness control, the MCU can implement a complete touch UI plus backlight controller on a single chip.
Recommended
Sensor Signal Conditioning and IoT Edge Node
The 12-bit ADCC, two 8-bit DACs and on-chip operational amplifier give the PIC18F16Q41-I/SO a complete analog signal chain for low-frequency sensors such as thermistors, RTDs, strain gauges and gas sensors. The op-amp configured as a transimpedance front-end feeds the ADC directly, so a photo-diode or current-output sensor requires very few external components. UART, SPI and I2C peripherals integrate with common IoT transceivers, and the 64 MHz core can supervise periodic sampling plus housekeeping with margin to spare.
Recommended
LED Lighting and Color Control
The PIC18F16Q41-I/SO targets multichannel LED control through its 16-bit PWM with multiple complementary outputs and two 8-bit DACs for setpoint and reference generation. The on-chip op-amp can be used for current sensing in a buck or boost driver, while the ADCC handles thermistor-based thermal derating in hardware. CLC peripherals permit rapid blanking and PWM synchronization without CPU intervention, which is essential for flicker-free dimming and high-side color-mixing topologies in commercial lighting fixtures.
Recommended
Brushed-DC Motor and Fan Controller
With a 16-bit PWM, dual 8-bit DACs and a hardware op-amp, the PIC18F16Q41-I/SO implements a closed-loop brushed-DC motor or fan controller in a single IC. The op-amp closes the current loop across a low-side shunt, the PWM drives a MOSFET half-bridge through external gate drivers, and the 12-bit ADC plus ADCC samples back-EMF or tach signals to maintain speed under varying load. The 64 MHz core gives plenty of headroom for PID math, fault handling and optional UART-based telemetry.
Recommended
Industrial Control and HMI Front End
The -I temperature grade, 20-SOIC footprint and rugged PIC18 architecture suit factory-automation HMI front ends such as small indicator panels, status displays and inline controllers. The 12-bit ADCC reads 4-20 mA loop inputs directly with the on-chip op-amp, while the 16-bit PWM drives analog setpoint output. CLC peripherals and Core Independent logic let simple housekeeping tasks run without CPU supervision, freeing the 64 MIPS core to handle Modbus RTU communication on UART and system diagnostics.
Recommended
Small Home Appliance and Consumer Embedded Control
Kitchen timers, personal-care appliances and small white-goods modules benefit from the PIC18F16Q41-I/SO's 64 MHz CPU, 64 KB Flash and integrated 12-bit ADC plus op-amp. The op-amp can condition a sensor-bridge for humidity, level or weight measurement; the 16-bit PWM controls brushed motors, heaters or solenoids; and UART/SPI/I2C link to user-interface boards or wireless coprocessors. The 20-SOIC package is easy to hand-prototype on through-hole boards, accelerating late-stage feature additions during product refresh cycles.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F16Q41-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F15Q41-I/SO | PIC18F14Q41-I/SO | PIC18F16Q40-I/SO | PIC18F15Q41-I/P | PIC18F16Q41-E/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SOIC | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same |
| Flash | 64 KB | 32 KB | 16 KB | 64 KB | 32 KB | 64 KB |
| SRAM | 4 KB | 2 KB | 1 KB | 4 KB | 2 KB | 4 KB |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| On-Chip Op-Amp | Yes | Yes | Yes | No | Yes | Yes |
| 16-bit PWM | Yes | Yes | Yes | No | Yes | Yes |
| ADC (with Computation) | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC | 12-bit ADCC |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (Extended) |
| Approx. Unit Price @ 100 | $1.81 | lower (~$1.60) | lower (~$1.40) | lower (~$1.65) | lower (~$1.55) | higher (~$1.95) |
Key Differentiators
- Largest Flash in the 20-pin PIC18 Q41 SOIC lineup (vs PIC18F15Q41-I/SO)
- Adds on-chip op-amp and 16-bit PWM that the Q40 lacks (vs PIC18F16Q40-I/SO)
- Industrial temperature -I grade suitable for most factory and consumer designs (vs PIC18F16Q41-E/SO)
- CV-capable ADCC automates capacitive touch sequencing (vs PIC18F14K50-I/SO)
Design Notes
Place a 1 uF X7R 0603 bypass capacitor directly between VDD (pin 1) and VSS (pin 11) and as close to the package as the layout allows. Add a second 0.1 uF bypass in parallel for clean high-frequency decoupling of the internal regulator. The MCU's power-on-reset requires the VDD ramp to follow the specification in the Electrical Characteristics section - any brown-out that drops VDD below 1.8 V for more than a few microseconds will trigger a clean reset, which is the behavior you want but document it for the system-level design.
Keep the analog sensor traces (connected to the op-amp inputs and ADCC channels on RA0-RA4 / RB3-RB7 / RC3-RC6) at least 3 mm away from digital PWM or switching traces, and guard the analog ground return with a separate pour that joins the main ground only at the VSS pin. The on-chip op-amp output is not rail-to-rail - use it with a headroom of at least 0.5 V on either rail to avoid distortion. For mTouch capacitive sensors, keep a solid ground hatch beneath the touch electrodes and never cross signal traces over the electrodes.
Do not confuse the ICSP data/clock pins (RC6/RC7) with general-purpose UART pins in a revision-A design; on PIC18F16Q41 these pins are mapped for ICSP and must be brought out to a 4-pin or 1-pin programming header so that firmware updates remain possible after assembly. A common mistake is to leave them as user I/O and lose debug access later. Likewise, do not enable the MCLR pull-up unless you actually need a manual reset - if the pin is unused it can be left configured as RA3 to save the internal current.
Reserve a contiguous PCB copper pour under and around the 20-SOIC for thermal relief; the MCU's junction-to-ambient resistance is in the 60-80 C/W range, so even at 32 MHz it dissipates far below 100 mW and does not require a heatsink. However if your firmware continuously drives GPIO at 20 mA each (such as a 4x20 mA LED matrix), the part can absorb up to ~600 mW and the copper area becomes the thermal relief path. For noisy environments, add a small CLC-based glitch filter on the MCLR line so that nearby switching noise does not false-trigger reset.
Compliance Information
RoHS and REACH compliant per Microchip product page. The -I industrial temperature grade is suitable for consumer and industrial applications but is not AEC-Q100 qualified for automotive safety-critical designs; for automotive, consult Microchip for a separately qualified part number.
