PIC18F05Q41-E/ST - 8-bit 64MHz 32KB Flash MCU | Microchip
MPN: PIC18F05Q41-E/ST ✓ 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 | $0.72 | $2,160.00 |
PIC18F05Q41-E/ST Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data bus and a Harvard or modified-Harvard architecture. PIC18 microcontrollers extend Microchip's PIC16 baseline with 16-bit program-word instructions, an enhanced 31-level stack, and linear data memory, which together simplify C-compiler code generation and enable interrupt-driven real-time control. The PIC18F05Q41 belongs to Microchip's PIC18-Q41 product family, which targets compact, high-performance designs where advanced analog integration reduces BOM count and board area.
Key differentiating features include a 64MHz internal oscillator (16 MIPS instruction throughput), Peripheral Pin Select (PPS) for flexible signal routing, Direct Memory Access (DMA) controllers, and multiple serial interfaces (UART, SPI, I2C). The integrated op-amp and 12-bit ADC2 enable closed-loop analog signal conditioning without external components, which is particularly useful in small-footprint sensor interfaces.
The PIC18F05Q41 is built on Microchip's enhanced mid-range core with hardware multiplier and C-friendly architecture, allowing efficient math operations in C while preserving the deterministic timing that 8-bit MCU users expect. The device supports low-power sleep modes and an on-board 32kHz oscillator for RTC-style timing, enabling battery-friendly designs in always-on sensor nodes.
Typical applications include IoT sensor nodes, industrial control, smart home devices, LED lighting control, battery management systems, and consumer electronics. The wide operating voltage range and rich analog/mixed-signal integration make the device a strong candidate for designs that previously required multiple discrete components.
When designing with this MCU, note the operating temperature grade encoded in the suffix: the -E variant supports the extended industrial grade of -40C to +125C, while the -I variant supports -40C to +85C. Use the -E variant for harsh-environment or automotive-adjacent designs that exceed standard commercial ranges. Proper decoupling with 100nF + bulk capacitors placed close to VDD/AVDD pins is essential for ADC2 accuracy.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing, replacement, and PCB-layout decisions.
Drop-in alternatives for PIC18F05Q41-E/ST — 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 PIC18F05Q41-E/ST (same form factor and footprint) — differing in ADC, Package, PWM, Operating Temperature, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F05Q40-E/ST
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →PIC18F05Q40-I/SL
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →PIC18F05Q40T-I/ST
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC18F05Q40T-I/SL
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC18F04Q41-E/SL
✅ Drop-In✓ In Stock
$0.79 / Unit
View Datasheet →PIC18F04Q40-I/ST
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC18F05Q41-E/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit enhanced mid-range |
| CPU Frequency | 64 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB |
| Data Memory (SRAM) | 2 KB |
| EEPROM | 512 bytes |
| ADC | 12-bit ADC2 (with Computation) |
| DAC | 8-bit DAC |
| Operational Amplifier | On-chip op-amp (1 unit) |
| PWM | 16-bit PWM |
| DMA | Yes (peripheral DMA) |
| PPS | Peripheral Pin Select |
| Serial Interfaces | UART, SPI, I2C |
| Package | 14-pin TSSOP (ST) 4.4 mm |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +125C (-E grade) |
| RoHS Status | Compliant |
PIC18F05Q41-E/ST Pin Configuration
| Pin 1 | RA5 — General purpose I/O / analog input |
| Pin 2 | RA4 — General purpose I/O / analog input |
| Pin 3 | RA3 — General purpose I/O / analog input |
| Pin 4 | RA2 — General purpose I/O / analog input / DAC output |
| Pin 5 | RA1 — General purpose I/O / analog input / op-amp output |
| Pin 6 | RA0 — General purpose I/O / analog input / op-amp inverting input |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7 — General purpose I/O / oscillator pin |
| Pin 9 | RA6 — General purpose I/O / oscillator pin |
| Pin 10 | RC0 — General purpose I/O / analog input |
| Pin 11 | RC1 — General purpose I/O / analog input |
| Pin 12 | RC2 — General purpose I/O / analog input |
| Pin 13 | VIO/DVIO — Digital I/O supply voltage |
| Pin 14 | VDD/AVDD — Positive supply voltage (analog/digital) |
Typical Applications
PIC18F05Q41-E/ST is suitable for 6 applications: IoT Sensor Node, Industrial Process Control, Smart Home Lighting Controller, Battery Management Monitor, Consumer Appliance Control, Hobbyist & Education Boards.
IoT Sensor Node
The PIC18F05Q41-E/ST is a strong fit for compact IoT sensor nodes where board area and BOM count are critical. The device integrates a 12-bit ADC2 with Computation, an on-chip operational amplifier, and an 8-bit DAC that together replace a typical three-chip analog front end (signal-conditioning op-amp + stand-alone ADC + reference DAC). The 64MHz CPU delivers 16 MIPS, sufficient for oversampling averaging and edge-protocol stacks; PPS lets the designer remap UART/SPI/I2C to any pin, simplifying two-layer PCB layouts. The -40C to +125C extended temperature grade allows outdoor or industrial-enclosure deployment without thermal derating. Typical battery life is extended by the device's Sleep and Idle modes, which together with DMA offload reduce average current to the microampere range for always-on sensor reporting.
Recommended
Industrial Process Control
In industrial process control loops, the PIC18F05Q41-E/ST's combination of a 16-bit PWM, DMA-driven 12-bit ADC2, and on-chip op-amp provides deterministic closed-loop control without external DSP. The 64MHz CPU executes a PID loop in tens of microseconds, while DMA moves ADC samples into PWM duty-cycle registers without CPU intervention, preserving real-time headroom for UART-based Modbus or SPI-based HMI updates. PPS allows signal routing to the few available TSSOP-14 pins, simplifying PCB escape on dense backplanes. The -40C to +125C operating range covers factory-floor cabinet temperatures without component derating, and the integrated 512-byte EEPROM supports non-volatile setpoint storage and tamper-resistant calibration.
Recommended
Smart Home Lighting Controller
The PIC18F05Q41-E/ST powers smart-home LED controllers by combining the 16-bit PWM for flicker-free dimming, DMA for smooth color-mixing effects, and the on-chip op-amp for current-sense amplification on the LED string. The 8-bit DAC can drive an external constant-current reference or serve as a programmable reference for tunable-white CCT control. UART/SPI/I2C interfaces connect to wireless modules (Wi-Fi/BLE/Zigbee) and to digital light sensors; PPS allows remapping any peripheral to any pin within the 14-pin TSSOP budget. The 32KB Flash fits Matter-over-Wi-Fi or Zigbee 3.0 stacks plus custom firmware, while 2KB SRAM buffers packet bursts during RF activity. The -E temperature grade supports enclosed fixture temperatures above 70C.
Recommended
Battery Management Monitor
The PIC18F05Q41-E/ST is well suited to battery management and battery-monitoring sub-systems thanks to its 12-bit ADC2 with Computation (ideal for coulomb counting), 8-bit DAC for programmable reference generation, and on-chip op-amp for high-side current sensing. DMA offloads cell-voltage sampling at high rates, freeing the CPU to compute state-of-charge algorithms. The 1.8V-5.5V supply range lets the device run directly from a single Li-ion cell or from a 3.3V regulated rail, and the 32KB Flash accommodates lookup-table-based cell-characterization profiles stored in non-volatile memory. The 512-byte EEPROM retains fault and cycle counters across power cycles, while the -40C to +125C grade supports battery-pack thermal environments.
Recommended
Consumer Appliance Control
For consumer appliances (coffee machines, blenders, air purifiers, washing-machine sub-modules), the PIC18F05Q41-E/ST delivers a balance of analog integration and 8-bit determinism. The 16-bit PWM drives motor-speed or heater-PID control, while the on-chip op-amp amplifies thermistor or pressure-sensor signals without external components. DMA offloads sensor sampling, leaving CPU cycles for user-interface debouncing, EEPROM-backed fault logging, and UART/SPI communication with display panels. PPS eases pin allocation across the 14-pin TSSOP footprint, and the -40C to +125C operating range handles appliance-compartment thermal stress. The 32KB Flash fits full-feature firmware including safety routines, while 2KB SRAM supports command buffers and stack depth.
Recommended
Hobbyist & Education Boards
The PIC18F05Q41-E/ST is a strong fit for hobbyist and educational microcontroller boards where advanced analog integration and small package size enable richer lab projects. The 14-pin TSSOP breaks out easily to breadboards, while the integrated op-amp, DAC, ADC2, and PWM allow students to build signal-conditioning, waveform-generation, and closed-loop control labs without external ICs. The 32KB Flash accommodates full C-language projects compiled by the free MPLAB XC8 compiler, and 2KB SRAM supports string handling and buffering. The -40C to +125C range allows outdoor or automotive-adjacent experiments without thermal concerns. PPS and DMA teach real-world MCU techniques often skipped in entry-level PIC16 labs.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F05Q41-E/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F05Q40-E/ST | PIC18F05Q40-I/SL | PIC18F05Q40T-I/ST | PIC18F04Q41-E/SL | PIC18F04Q40-I/ST |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TSSOP-14 (ST) | TSSOP-14 (ST) - same | TSSOP-14 (SL equivalent) | TSSOP-14 (ST) - same | TSSOP-14 (SL equivalent) | TSSOP-14 (ST) - same |
| CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| On-Chip Op-Amp | Yes (1) | No | No | No | Yes (1) | No |
| DAC | 8-bit | No | No | No | 8-bit | No |
| DMA | Yes | No | No | No | Yes | No |
| ADC | 12-bit ADC2 | 12-bit ADC (basic) | 12-bit ADC (basic) | 12-bit ADC (basic) | 12-bit ADC2 | 12-bit ADC (basic) |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
Key Differentiators
- Integrated on-chip operational amplifier (vs PIC18F05Q40-E/ST)
- 8-bit DAC and DMA (vs PIC18F05Q04-E/SL equivalent)
- Enhanced ADC2 with Computation (vs PIC18F05Q40-E/ST)
Design Notes
Place a 100nF decoupling capacitor as close as possible to each VDD/AVDD pin and a 10uF bulk capacitor near the IC supply input. The PIC18F05Q41-E/ST has separate DVIO and AVDD pins that should be tied to the same rail through a ferrite bead for ADC2 noise isolation - this is critical because the 12-bit ADC2 typically achieves >70 dB SNR only when high-frequency digital switching noise is filtered from the analog supply. Estimated: assuming typical ADC reference of 4.096V and 100nF + 10uF decoupling, supply-noise rejection at the ADC input is approximately 60dB at 1MHz.
The TSSOP-14 package has a typical theta_JA of approximately 80-100 C/W on a standard 4-layer JEDEC test board. Estimated: at 64MHz with all peripherals active and 1.8V supply, the core current is roughly 8-12 mA and total power dissipation is well under 50 mW, giving a junction temperature rise under 5C - thermal management is not a concern for typical applications. For high-temperature environments near +125C ambient, ensure solder-joint reliability by using a manufacturer-recommended PCB pad pattern and stencil aperture.
Keep analog input traces short and routed away from PWM outputs and digital switching lines to preserve ADC2 accuracy. The on-chip op-amp inverting/non-inverting inputs are mapped to specific pins; do not reassign those pins to PWM or digital functions through PPS unless the op-amp is disabled. A solid ground plane under the IC improves ADC2 noise performance and reduces EMI emissions from the 64MHz internal oscillator. PPS assignments should be locked early in firmware to avoid unintended pin-function changes during development.
Common pitfalls when using the PIC18F05Q41-E/ST include: (1) forgetting to configure the on-chip op-amp output pin before enabling the peripheral, leading to pin contention; (2) using ADC2 without first enabling the internal voltage reference module, which causes the first ADC reading to be incorrect; (3) assuming the -E and -I variants are drop-in for one another across the full -40C to +125C range - select the correct grade for the operating environment. Always refer to the PIC18FXXQ41 family errata document before finalizing firmware for production.
Compliance Information
RoHS compliance per Microchip product page (TSSOP-14 lead-free finish). AEC-Q100 not applicable for this extended-industrial-grade part; for AEC-Q100 qualified PIC18 variants, consult Microchip automotive-grade datasheets. REACH and conflict-minerals compliance declared by Microchip; certificate available on request.
