PIC18F27Q83-I/5N - 8-bit 64MHz 128KB Flash MCU | Microchip
MPN: PIC18F27Q83-I/5N ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.05 | $30.50 |
| 100 | $2.68 | $268.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC18F27Q83-I/5N Overview
What is an 8-bit microcontroller? An 8-bit MCU is a single-chip computer with an 8-bit data path that executes instructions on 8-bit-wide registers while typically embedding Flash program memory, SRAM data memory, EEPROM, and a rich peripheral set (ADC, timers, communication controllers). The PIC18 architecture sits in the middle of Microchip's 8-bit lineup, offering higher performance (up to 64 MHz / 16 MIPS with the C compiler-optimized core), more memory, and more Core Independent Peripherals (CIPs) than the baseline PIC16 family. In the broader taxonomy: microcontroller -> embedded MCU -> 8-bit MCU -> PIC18 family -> PIC18-Q83 sub-family with CAN.
Key features include 24-channel 12-bit ADC with computation, 1 channel of 8-bit DAC, 4 CLCs (Configurable Logic Cells), DSM, multiple PWM/Capture/Compare modules, CAN FD, and a comprehensive Core Independent Peripheral set that lets timers, ADCs and communications operate with zero CPU intervention, freeing the core for application logic. The 28-VQFN package delivers a compact 6x6 mm footprint while still exposing 25 GPIO lines.
Typical applications include automotive body and comfort networks (CAN bus nodes), industrial sensor hubs, sensor transmitter modules, HVAC control boards, motor control subnodes, and lighting controllers where the combination of low power, small footprint, and CAN connectivity offers strong system-level value.
Design consideration: With 1.8 V to 5.5 V operation, this part can run from a single Li-ion cell down to deep discharge. The internal 64 MHz HFINTOSC eliminates the need for an external crystal in many cost-sensitive designs, but for CAN bus timing accuracy the user should select the PLL-driven external oscillator chain.
Drop-in alternatives for PIC18F27Q83-I/5N — 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 PIC18F27Q83-I/5N (same form factor and footprint) — differing in ADC, DAC, Data EEPROM, Maximum CPU Frequency, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18F27Q83-I/5N
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC18F27Q83T-I/5N
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC18F27Q83-E/5N
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F27Q43-I/5N
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18F27K42-I/ML
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC18F27Q83-I/5N Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC18 8-bit RISC |
| Maximum CPU Frequency | 64 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| Data SRAM | 13 KB |
| Data EEPROM | 1 KB (1K x 8) |
| Supply Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 12-bit, up to 24 channels |
| DAC | 8-bit, 1 channel |
| CAN | Yes (CAN FD) |
| Communication Peripherals | I2C, SPI, UART, CAN |
| PWM / CCP | Multiple PWM/CCP channels (DSM, CLC included) |
| Package | 28-VQFN (6x6 mm) |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC18F27Q83-I/5N Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O with interrupt-on-change |
| Pin 2 | RA4 — Bidirectional I/O / SOSCO |
| Pin 3 | RA3 — Bidirectional I/O / VREF+ |
| Pin 4 | RA2 — Bidirectional I/O / DAC output |
| Pin 5 | RA1 — Bidirectional I/O / OPA1 output |
| Pin 6 | RA0 — Bidirectional I/O / ICDDAT |
| Pin 7 | VSS — Ground reference |
| Pin 8 | VDD — Positive supply voltage |
| Pin 9 | RB7 — Bidirectional I/O / ICSPCLK |
| Pin 10 | RB6 — Bidirectional I/O / ICSPDAT |
| Pin 11 | RB5 — Bidirectional I/O |
| Pin 12 | RB4 — Bidirectional I/O |
| Pin 13 | RB3 — Bidirectional I/O |
| Pin 14 | RB2 — Bidirectional I/O |
| Pin 15 | RB1 — Bidirectional I/O |
| Pin 16 | RB0 — Bidirectional I/O / ZCD |
| Pin 17 | RC7 — Bidirectional I/O / RX |
| Pin 18 | RC6 — Bidirectional I/O / TX |
| Pin 19 | RC5 — Bidirectional I/O |
| Pin 20 | RC4 — Bidirectional I/O |
| Pin 21 | RC3 — Bidirectional I/O / SCL |
| Pin 22 | RC2 — Bidirectional I/O / SDA |
| Pin 23 | RC1 — Bidirectional I/O / CCP |
| Pin 24 | RC0 — Bidirectional I/O |
| Pin 25 | VSS — Ground reference (digital) |
| Pin 26 | AVSS — Analog ground reference |
| Pin 27 | RA7 — Bidirectional I/O / VREF- |
| Pin 28 | RA6 — Bidirectional I/O / VPP |
| Pin EP | EP — Exposed thermal pad - must be soldered to PCB ground pour |
Typical Applications
PIC18F27Q83-I/5N is suitable for 8 applications: Automotive CAN Bus Nodes, Industrial Sensor Hubs, HVAC Control Boards, Battery-Powered IoT Sensor Nodes, LED Lighting Controllers, Motor Control Subnodes, Consumer Appliance Control, Security and Access Control Panels.
Automotive CAN Bus Nodes
The PIC18F27Q83-I/5N's integrated CAN FD controller and 64 MHz CPU make it well-suited for body and comfort CAN bus nodes such as seat controllers, mirror modules, or lighting ECUs. With 128 KB of Flash and 13 KB of SRAM it comfortably holds a J1939 or CANopen stack alongside application firmware. Operating across 1.8 V to 5.5 V, the MCU runs from a regulated 5 V automotive rail while the CAN transceiver handles bus side. Industrial temperature (-40C to +85C) suits cabin-mounted nodes; for under-hood deployments choose the -E extended temperature grade variant in the same QFN package.
Recommended
Industrial Sensor Hubs
With 24 channels of 12-bit ADC, 4 CLCs, and the DSM (Data Signal Modulator), the PIC18F27Q83-I/5N consolidates analog sensor conditioning, digital filtering, and protocol bridging in a single 6x6 mm VQFN footprint. Industrial sensor hubs can read multiple 4-20 mA or 0-10 V analog channels, perform scaling in hardware via the ADC's Computation mode, and report aggregated readings over UART or RS-485. The 64 MHz core handles Modbus RTU stack execution while CIPs offload pulse counting, PWM generation, and timing without CPU load, enabling deterministic response in factory-floor deployments.
Recommended
HVAC Control Boards
The PIC18F27Q83-I/5N is a strong fit for HVAC blower and damper controllers that combine temperature sensing, triac-fired AC load switching, and CAN/LIN connectivity. The 8-bit DAC can drive analog setpoint inputs to upstream boards, while PWM outputs (multiple CCP channels) phase-control AC loads through zero-cross detectors. Operating at 1.8 V to 5.5 V lets the same MCU run on a 3.3 V or 5 V supply, simplifying BOM variants for 24 VAC and 230 VAC HVAC product families. CLCs replace small CPLDs for triac firing logic.
Recommended
Battery-Powered IoT Sensor Nodes
Operating from 1.8 V to 5.5 V, the PIC18F27Q83-I/5N runs directly from a single Li-ion cell (3.0-4.2 V) or 2x AA alkaline cells, eliminating boost converters and reducing BOM cost. Core Independent Peripherals (CIPs) handle ADC scans, PWM outputs, and UART framing while the CPU sleeps in nanowatt-power IDLE or DOZE modes, dramatically reducing average current. With 128 KB Flash and 13 KB SRAM, the MCU accommodates small TCP/IP or LoRaWAN stacks for battery-powered remote sensors. The 28-VQFN 6x6 mm footprint suits compact wearable or in-field sensor enclosures.
Recommended
LED Lighting Controllers
Multiple PWM/CCP channels on the PIC18F27Q83-I/5N drive RGBW LED strings directly or via external MOSFET drivers, while the 12-bit ADC reads color-mixing feedback photodiodes or temperature sensors for closed-loop thermal management. The 64 MHz CPU runs DMX-512 or DALI receive stacks while CLCs generate fault-watchdog signals in hardware. Industrial temperature grade supports indoor commercial lighting installations; the wide 1.8-5.5 V range simplifies power supply design for both 5 V and 3.3 V LED driver topologies.
Recommended
Motor Control Subnodes
The PIC18F27Q83-I/5N's PWM/CCP modules and DSM can complement dedicated motor controllers by handling encoder feedback (QEI via CCP), Hall-sensor decoding, and CAN bus communication in distributed motor architectures. With 64 MHz CPU speed and 13 KB SRAM, the MCU executes Field-Oriented Control (FOC) math or trapezoidal commutation tables for BLDC and stepper motors up to moderate RPM. Industrial temperature and the 28-VQFN footprint suit space-constrained motor PCBAs such as small pump, fan, or actuator boards.
Recommended
Consumer Appliance Control
The PIC18F27Q83-I/5N is well-matched to consumer appliance controls such as coffee machines, washing machine user-interface boards, and small kitchen appliances. With 128 KB Flash it stores multi-language UI strings and capacitive-touch firmware, while the 12-bit ADC reads temperature, humidity, and water-level sensors. Operating from 1.8 V to 5.5 V lets the MCU share a regulated rail with capacitive-touch ICs and small OLED displays. CAN or UART connectivity supports modern appliance bus architectures and smart-home bridges.
Recommended
Security and Access Control Panels
The PIC18F27Q83-I/5N's combination of CAN FD, UART, and ample Flash makes it a strong central controller for access control panels that read Wiegand or OSDP card readers, drive relay outputs, and log events. With 1 KB of EEPROM storing credential blacklists and 13 KB SRAM buffering event logs, the MCU can serve small-to-medium access control installations without external memory. Industrial temperature supports indoor security cabinet deployments; the 28-VQFN 6x6 mm footprint suits compact panel PCBs.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F27Q83-I/5N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F27Q83T-I/5N | PIC18F27Q83-E/5N | PIC18F27Q43-I/5N | PIC18F27K42-I/ML |
|---|---|---|---|---|---|
| Package | 28-VQFN (6x6 mm) | 28-VQFN (6x6 mm) - same | 28-VQFN (6x6 mm) - same | 28-VQFN (6x6 mm) - same | 28-VQFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 13 KB | 13 KB | 13 KB | 13 KB | 8 KB |
| CAN FD | Yes | Yes | Yes | No (CAN optional in Q43 family) | Yes |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| CPU Frequency | 64 MHz | 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 | 2.3 V to 5.5 V |
Key Differentiators
- CAN FD in 28-VQFN at this price point (vs PIC18F27Q43-I/5N)
- Highest-in-class Core Independent Peripheral count in 28-pin QFN (vs PIC18F27K42-I/ML)
- Extended temperature option in same QFN footprint (vs PIC18F27Q83T-I/5N)
Design Notes
Estimated: the 28-VQFN exposed thermal pad (EP) must be soldered to a copper pour on the PCB with at least 6 thermal vias (0.3 mm drill, 1 mm pitch) to the internal ground plane. Without proper EP soldering the junction-to-ambient thermal resistance (theta_JA ~30 C/W on a 4-layer JEDEC test board) will degrade dramatically and may cause thermal shutdown at the maximum 64 MHz CPU load. The Microchip PIC18F27/47/57Q83 datasheet shows the recommended land pattern in section 5.
Place a 0.1 uF ceramic decoupling capacitor as close as possible to each VDD pin (pins 8 and 25 on this 28-VQFN). Add a single 1 uF to 10 uF bulk capacitor near the MCU VDD supply. The PIC18F27Q83-I/5N has multiple VSS pins (7, 25, 26) which must all be tied to a low-impedance ground plane for ADC accuracy. According to the Microchip datasheet, AVSS must be tied to the same ground as VSS through a star-ground topology.
When migrating from PIC18F26K80 or PIC18F25K80 designs, note that the PIC18F27Q83 uses PPS (Peripheral Pin Select) for flexible pin mapping of UART/SPI/I2C/CCP - you MUST configure PPS registers at startup, otherwise peripherals will not function. Also, the Q83 family removed the internal 8 MHz LFINTOSC; use the 32 kHz SOSC crystal or external LF clock for RTC applications. The CAN peripheral is mapped to specific PPS pin groups - check the datasheet pin allocation tables.
For CAN bus designs with the PIC18F27Q83-I/5N, keep the CAN TX/RX traces to the transceiver short and well-matched in length. Use 120 ohm characteristic impedance, place a split termination resistor network near the bus pins, and add a common-mode choke for EMI-sensitive installations. The CAN FD peripheral supports up to 5 Mbps but requires the system clock to be an integer multiple of the bit time - configure the PLL from a high-accuracy external crystal.
Compliance Information
Industrial temperature grade only; -E variant extends to +125C. RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - select automotive-grade Q83 variant for automotive deployments.
