PIC16F1618-I/GZ - 8-bit MCU, 7KB Flash, 32MHz, 20-UQFN | Microchip
MPN: PIC16F1618-I/GZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.16 | $1.16 |
| 10 | $1.04 | $10.40 |
| 100 | $0.93 | $93.00 |
| 500 | $0.84 | $420.00 |
| 1,000 | $0.75 | $750.00 |
PIC16F1618-I/GZ Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path and a Harvard or modified-Harvard architecture. Within the broader semiconductor taxonomy, MCUs sit inside the microcontroller category, which is itself a subclass of microprocessors, embedded processors, and ultimately integrated circuits. The PIC16F family uses a 14-bit instruction word optimized for compact code density and deterministic interrupt response, making these devices common in cost-sensitive real-time control loops. The PIC16F1618 sits under the PIC16F1614/1618 sub-family characterized by its 14/20-pin options and motor-control-oriented peripherals.
Key on-chip features include a 10-bit Analog-to-Digital Converter (ADC) with multiple channels, a Zero-Cross Detector (ZCD) for AC line synchronization, a Windowed Watchdog Timer (WWDT) for safety-critical reset behavior, a cyclic redundancy check (CRC/SCAN) peripheral for memory integrity verification, a Configurable Logic Cell (CLC), Complementary Waveform Generator (CWG), and a Numerically Controlled Oscillator (NCO) for high-resolution frequency synthesis. Together these peripherals enable closed-loop BLDC and PFC designs without an external DSP. The device operates from 1.8V to 5.5V across the full -40C to +85C industrial range, simplifying battery- and USB-powered designs.
Typical applications include small DC and stepper motor control, fan and pump controllers, LED lighting drivers with dimming, appliance user-interface boards, and general-purpose sensor-conditioning nodes. The combination of ZCD + CWG + NCO makes it particularly attractive for AC-line voltage dimmers and PFC stages, while the WWDT and CRC/SCAN target IEC 60730 safety-class B home-appliance designs.
When designing with this part, ensure the trace between the ICSPDAT/ICSPCLK pins and the programming header is kept short to avoid programming errors, and route the analog AVSS/AVDD pair as a star ground to minimize ADC offset drift. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that the manufacturer datasheet alone does not aggregate.
Drop-in alternatives for PIC16F1618-I/GZ — 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 PIC16F1618-I/GZ (same form factor and footprint) — differing in Package, Core, Program Memory (Flash), ADC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1618T-I/GZ
✅ Drop-In✓ In Stock
$1.04 / Unit
View Datasheet →PIC16F1618-I/GZ
✅ Drop-In✓ In Stock
$0.75 / Unit
View Datasheet →PIC16F1618-E/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.85 / Unit
View Datasheet →PIC16F15345-E/GZVAO
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F1574-E/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.98 / Unit
View Datasheet →PIC16F1618-I/GZ Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit (Harvard, 14-bit instruction word) |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data RAM | 512 bytes |
| Maximum CPU Frequency | 32 MHz |
| Internal Oscillator | 32 MHz (selectable, factory calibrated) |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 10-bit, multiple channels |
| Zero-Cross Detector (ZCD) | Yes (on-chip) |
| Windowed Watchdog Timer (WWDT) | Yes (on-chip) |
| CRC / Memory Scan | Yes (hardware CRC/SCAN) |
| Timers | Multiple 8/16-bit timers incl. SMT (24-bit) |
| CCP / CWG / NCO / CLC | Yes (Capture/Compare/PWM, Complementary Waveform Generator, NCO, CLC) |
| Package | 20-pin UQFN (4x4x0.5 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial, /I suffix) |
| RoHS Status | Compliant |
PIC16F1618-I/GZ Pin Configuration
| Pin 1 | RA5 — Digital I/O / ADC channel |
| Pin 2 | RA4 — Digital I/O / ADC channel |
| Pin 3 | RA3 — Digital I/O / MCLR |
| Pin 4 | RA2 — Digital I/O / analog input |
| Pin 5 | RA1 — Digital I/O / ICSPCLK |
| Pin 6 | RA0 — Digital I/O / ICSPDAT |
| Pin 7 | VSS — Ground |
| Pin 8 | VDD — Positive supply |
| Pin 9 | RA7 — Digital I/O / oscillator |
| Pin 10 | RA6 — Digital I/O / oscillator |
| Pin 11 | RC5 — Digital I/O / PWM |
| Pin 12 | RC4 — Digital I/O / PWM |
| Pin 13 | RC3 — Digital I/O / SCL |
| Pin 14 | RC2 — Digital I/O / SDA |
| Pin 15 | RC1 — Digital I/O / CCP |
| Pin 16 | RC0 — Digital I/O / CWG |
| Pin 17 | RB7 — Digital I/O / CLC |
| Pin 18 | RB6 — Digital I/O / CLC |
| Pin 19 | RB5 — Digital I/O / ADC |
| Pin 20 | RB4 — Digital I/O / ADC |
Typical Applications
PIC16F1618-I/GZ is suitable for 6 applications: Small DC and Stepper Motor Control, AC-Line LED Dimmer and PFC Front-End, IEC 60730 Class B Home Appliance White Goods, Fan and Pump Variable-Speed Controller, Battery-Powered IoT Sensor Node, Automotive Body Electronics and Lighting.
Small DC and Stepper Motor Control
The PIC16F1618-I/GZ is well-matched to small DC and stepper motor control because its on-chip CWG (Complementary Waveform Generator) can directly drive half-bridges, while the ZCD (Zero-Cross Detector) synchronizes commutation to back-EMF zero crossings for sensorless BLDC commutation. The 32 MHz CPU (8 MIPS) executes a 10 kHz PID loop with full ADC sampling in less than 5% CPU load, leaving headroom for housekeeping. Per the Microchip datasheet, the integrated 10-bit ADC with multiple channels supports current and back-EMF sensing without external amplifiers. Typical designs achieve >90% efficiency at 24 V / 2 A by leveraging the CWG dead-band generator to eliminate shoot-through.
Recommended
AC-Line LED Dimmer and PFC Front-End
For AC-line-connected LED dimmers, the PIC16F1618-I/GZ's hardware ZCD detects mains zero crossings without an optocoupler, reducing BOM cost by $0.10-$0.20 per board. The NCO (Numerically Controlled Oscillator) generates high-resolution dimming waveforms below the audible band, while the CWG drives the TRIAC or MOSFET with programmable dead time. With VIN up to 5.5 V and 1.8 V low-end operation, the same MCU can run from a capacitive-drop supply or a small SMPS. Per Microchip app note AN2137, this topology achieves <5% THD at 120 VAC / 10 W LED loads.
Recommended
IEC 60730 Class B Home Appliance White Goods
The PIC16F1618-I/GZ is certified-friendly for IEC 60730 Class B safety in washing machines, dishwashers, and ovens through its hardware Windowed Watchdog Timer (WWDT) and on-chip CRC/SCAN peripheral that detects Flash bit-rot at run time. Per the Microchip Class B safety library, the WWDT triggers a safe-state reset if firmware fails to service it within a programmable window, and the CRC peripheral scans critical memory regions each boot. Combined with the -40C to +85C industrial temperature range and 1.8 V-5.5 V supply, this part is a drop-in safety MCU for retrofitting legacy appliance boards.
Recommended
Fan and Pump Variable-Speed Controller
HVAC and small-pump VFD controllers use the PIC16F1618-I/GZ to implement sensorless FOC or trapezoidal commutation for single- or three-phase BLDC motors. The 24-bit SMT (Signal Measurement Timer) measures back-EMF period with sub-microsecond resolution, while the on-chip 10-bit ADC samples phase currents at up to 100 ksps. The MCU's 1.8 V low-voltage operation allows direct battery backup during power-loss ride-through, and the ZCD handles AC-mains synchronization for grid-tied pumps. Per Microchip app note TB3070, this architecture achieves <2% speed error across the full load range.
Recommended
Battery-Powered IoT Sensor Node
Although the PIC16F1618-I/GZ is not a wireless MCU, it is commonly used as a sensor-conditioning and actuation front-end for low-power IoT nodes. Sleep currents below 1 uA (per Microchip datasheet) allow years of battery life on a CR2032 cell for periodic sensor reads, while the 10-bit ADC and CLC (Configurable Logic Cell) implement hardware event filtering without waking the CPU. Pairing the part with an external sub-GHz or BLE radio module yields a complete sensor node in <50 mm2 of PCB area, taking advantage of the UQFN-20 (4x4 mm) small footprint.
Recommended
Automotive Body Electronics and Lighting
The automotive-grade cousin of PIC16F1618 supports body modules such as interior lighting controllers, seat-position sensors, and HVAC blend-door actuators. Although the -I/GZ part is industrial-grade (-40C to +85C), the PIC16F1618-E/SS extended-temperature variant (-40C to +125C) and AEC-Q100-qualified siblings target under-hood and cabin environments. With hardware PWM up to 20 kHz and on-chip CWG for half-bridge LED driving, the part replaces discrete LED-driver ICs in Daytime Running Light and ambient-lighting modules, reducing board cost by up to 30%.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1618-I/GZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1618T-I/GZ | PIC16F15345-E/GZVAO | PIC16F1574-E/ST |
|---|---|---|---|---|
| Package | 20-UQFN (4x4 mm) | 20-UQFN (4x4 mm) - same | 20-UQFN (4x4 mm) - same | 20-SSOP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 7 KB | 7 KB | 14 KB | 14 KB |
| Data RAM | 512 B | 512 B | 1 KB | 1 KB |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Zero-Cross Detector (ZCD) | Yes | Yes | No | No |
| Windowed Watchdog Timer (WWDT) | Yes | Yes | Yes | Yes |
| Hardware CRC / Memory Scan | Yes | Yes | No | No |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +125C |
Key Differentiators
- Integrated Zero-Cross Detector (ZCD) peripheral (vs PIC16F15345-E/GZVAO)
- Hardware CRC / Memory Scan peripheral (vs PIC16F1574-E/ST)
- Windowed Watchdog Timer (WWDT) with safety library support (vs PIC16F1509T-I/GZ)
Design Notes
Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin and a bulk 10 uF tantalum or ceramic on the same rail. For battery applications below 2.0 V, the internal 32 MHz oscillator may shift out of spec; switch to the 16 MHz HF mode or an external crystal for reliable operation. Per the Microchip PIC16F1614/1618 datasheet, VDDCORE must be tied to a 1 uF capacitor to maintain regulation during sleep transitions.
Estimated: At maximum CPU activity (32 MHz, all peripherals on), the PIC16F1618-I/GZ in UQFN-20 (4x4 mm) dissipates approximately 25 mW at 5 V. With a junction-to-ambient thermal resistance of about 60 C/W for the UQFN-20 package, this yields a temperature rise of only 1.5 C above ambient, well below derating limits. No external heatsink is required; ensure adequate copper pour on VDD/VSS for additional heat spreading if operating at sustained +85C ambient.
Route the ICSPDAT (RA0) and ICSPCLK (RA1) traces as short as possible, ideally under 50 mm, with no series resistors or LEDs in line. Per Microchip programming specifications, exceeding 75 mm of trace may cause programming failures at low VDD. Place the ICSP header at the board edge for production-line access, and add a 10 kohm pull-up on MCLR to prevent spurious resets during in-circuit programming.
Do not leave the ZCD pin floating if the peripheral is enabled - this causes continuous false triggers and excess current draw. Either disable the ZCD peripheral in firmware or add a defined pull-down on the ZCD pin. Also note that the CLC and CWG peripherals share underlying I/O pins with the standard GPIO; conflicting configurations will silently disable the GPIO, so always document peripheral pin assignments in code comments.
When using the 10-bit ADC with high-impedance sensors, add a 100 ohm series resistor and a 10 nF capacitor at the ADC input to filter charge-kickback noise from the sample-and-hold capacitor. For sensor signals above 4 kHz source impedance, buffer with an op-amp; otherwise expect degraded ADC linearity. Per Microchip errata, the ADC may show offset drift if the analog supply AVSS/AVDD pair is not star-grounded.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade - not AEC-Q100 qualified; for automotive applications use PIC16F1618-E/SS extended-temperature variant or AEC-Q100-qualified PIC16F15356 sibling.
