PIC16F1618T-I/GZ - 8-bit MCU, 7KB Flash, 32MHz, 20-UQFN | Microchip
MPN: PIC16F1618T-I/GZ โ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.72 | $17.20 |
| 100 | $1.55 | $155.00 |
| 500 | $1.38 | $690.00 |
| 1,000 | $1.21 | $1,210.00 |
| 3,300 | $1.04 | $3,432.00 |
PIC16F1618T-I/GZ Overview
An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, program memory (Flash/ROM), data memory (RAM), and peripherals on a single die. Within the broader semiconductor hierarchy, the PIC16F1618 belongs to the 8-bit MCU family, which itself sits inside the microcontroller category of embedded computing ICs, ultimately under power-managed semiconductor devices. The PIC16F161X family specifically targets low-power embedded control of small motors and general-purpose applications, with peripherals such as Complementary Output Generator (COG), 24-bit Signal Measurement Timer (SMT), and Configurable Logic Cells (CLC) that displace discrete analog/digital glue logic.
Key differentiating features include the 24-bit SMT for high-resolution time-of-flight and angle measurement, the Zero-Cross Detection peripheral for TRIAC dimming and motor control without optocouplers, and Configurable Logic Cells that let designers wire internal peripherals using a small on-chip logic fabric - reducing external component count. The device also offers Peripheral Pin Select (PPS) for flexible I/O mapping and a low-power XLP (eXtreme Low Power) technology variant, with typical sleep current in the sub-microamp region. Together these features position the PIC16F1618 for compact, energy-aware designs.
Architecturally, the PIC16F1618 uses Microchip's enhanced mid-range 8-bit core with a 14-bit instruction word, a hardware multiplier, and a deterministic interrupt controller. The Harvard bus separates instruction fetch from data access, giving predictable execution timing that is essential for motor control loops and zero-cross timing applications.
Typical applications include AC TRIAC dimming with zero-cross detection, small BLDC/PMSM motor control with back-EMF sensing, battery-powered sensor nodes using the XLP sleep modes, and general-purpose 8-bit control in white goods and consumer appliances. The 20-UQFN package suits compact PCB layouts where a 4x4 mm footprint is required.
When designing with this part, choose the 20-UQFN (GZ) variant for the smallest PCB area and pair it with the Microchip MPLAB X IDE and XC8 compiler; for drop-in compatibility with the same package keep the PIC16F1613/PIC16F1615/PIC16F1619 family in mind.
This page synthesizes distributor pricing, drop-in alternatives in the same 20-UQFN footprint, and practical design notes not aggregated in the manufacturer datasheet alone.
Drop-in alternatives for PIC16F1618T-I/GZ โ 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 PIC16F1618T-I/GZ (same form factor and footprint) โ differing in ADC, Package, Program Memory (Flash), Core, Data RAM.
Quick Comparison Tool โ Select alternative parts for side-by-side comparison:
PIC16F1619T-I/GZ
โ Drop-In๐ Reference alternative (not in catalog)
PIC16F1509T-I/GZ
โ Drop-Inโ In Stock
$0.97 / Unit
View Datasheet โPIC16F1618T-I/GZ Maximum Ratings & Electrical Characteristics
| Core | PIC16 (8-bit enhanced mid-range) |
| Instruction Word Width | 14-bit |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data SRAM | 512 bytes |
| Maximum Clock Frequency | 32 MHz |
| Internal Oscillator | Yes, 32 MHz |
| Operating Supply Voltage | 2.3 V to 5.5 V |
| ADC | 10-bit |
| Zero-Cross Detection (ZCD) | Yes |
| Watchdog Timer | Windowed Watchdog Timer (WWDT) |
| CRC with Memory Scan | Yes |
| Number of I/Os | 18 |
| Operating Temperature Range | -40 C to +85 C (Industrial, "I") |
| Package | 20-pin UQFN (4x4 mm) |
| Mounting Type | Surface Mount |
| Peripheral Pin Select (PPS) | Yes |
| 24-bit Signal Measurement Timer (SMT) | Yes |
| Configurable Logic Cell (CLC) | Yes |
| XLP (eXtreme Low Power) | Yes |
| RoHS Status | Compliant |
PIC16F1618T-I/GZ Pin Configuration
| Pin 1 | RA5 โ GPIO / I/O |
| Pin 2 | RA4 โ GPIO / I/O |
| Pin 3 | RA3 โ GPIO / I/O |
| Pin 4 | RA2 โ GPIO / I/O |
| Pin 5 | RA1 โ GPIO / I/O (ICSPCLK) |
| Pin 6 | RA0 โ GPIO / I/O (ICSPDAT) |
| Pin 7 | VDD โ Positive supply (2.3V to 5.5V) |
| Pin 8 | VSS โ Ground reference |
| Pin 9 | RB7 โ GPIO / I/O |
| Pin 10 | RB6 โ GPIO / I/O (PGC) |
| Pin 11 | RB5 โ GPIO / I/O (PGD) |
| Pin 12 | RB4 โ GPIO / I/O |
| Pin 13 | RB3 โ GPIO / I/O |
| Pin 14 | RB2 โ GPIO / I/O |
| Pin 15 | RB1 โ GPIO / I/O |
| Pin 16 | RB0 โ GPIO / I/O (INT) |
| Pin 17 | RC7 โ GPIO / I/O |
| Pin 18 | RC6 โ GPIO / I/O |
| Pin 19 | RC5 โ GPIO / I/O |
| Pin 20 | RC4 โ GPIO / I/O |
Typical Applications
PIC16F1618T-I/GZ is suitable for 6 applications: AC TRIAC Dimmer Module, Small BLDC / PMSM Motor Control, Battery-Powered IoT Sensor Node, White Goods User Interface Controller, Industrial Sensor Conditioning, Consumer Appliance Timer Module.
AC TRIAC Dimmer Module
The PIC16F1618T-I/GZ is ideal for leading-edge and trailing-edge AC dimmers thanks to its integrated Zero-Cross Detection (ZCD) peripheral, which senses the AC mains zero-cross event directly on a GPIO pin without an optocoupler. The 24-bit Signal Measurement Timer (SMT) timestamps the ZCD event with 32 MHz resolution, enabling accurate TRIAC firing-angle calculation. The 7 KB Flash holds dimming curves, fade tables, and user-interface state machines. The 20-UQFN (4x4 mm) package fits inside wall-switch form factors. Operating voltage of 2.3V to 5.5V lets the MCU share a small linear regulator derived from the rectified mains. Per Microchip's PIC16F161X application notes, the CLC peripheral can replace discrete logic between ZCD and TRIAC drive, reducing BOM cost and PCB area.
Recommended
Small BLDC / PMSM Motor Control
The PIC16F1618T-I/GZ can run small sensorless BLDC or PMSM motor commutation loops because the 24-bit SMT captures back-EMF zero-cross events with sub-microsecond resolution, and the Configurable Logic Cells (CLC) generate complementary PWM dead-time without external gates. The 32 MHz core delivers enough MIPS for Field-Oriented Control (FOC) lite algorithms in fans or pumps below 50W. The 20-UQFN package's exposed pad provides a low thermal resistance path for the modest dissipation typical of these control loops. The WWDT with windowed mode satisfies functional-safety expectations for consumer motor-control. Per Microchip AN2049, the PIC16F161X family is recommended for compact BLDC drivers where the MCU replaces a discrete analog control board.
Recommended
Battery-Powered IoT Sensor Node
The PIC16F1618T-I/GZ with its XLP (eXtreme Low Power) technology delivers sub-microamp sleep current, making it suitable for battery-powered wireless sensor nodes that wake periodically to measure and transmit. The 10-bit ADC reads sensor outputs at low supply voltage down to 2.3V, allowing direct connection to 2x AA alkaline cells. The 32 MHz internal oscillator eliminates an external crystal for the wake-up burst, reducing BOM cost. The CRC with memory-scan peripheral provides data-integrity checks on Flash reads - useful for unattended sensor installations. The 20-UQFN (4x4 mm) package keeps the PCB small enough to fit inside a coin-cell sensor housing.
Recommended
White Goods User Interface Controller
The PIC16F1618T-I/GZ serves well as a low-cost user-interface and timer controller in white goods such as washing machines, dishwashers, and ovens where it scans keypads, drives LED indicators, and orchestrates main power events. The 18 I/O pins comfortably drive a 4x4 matrix keypad plus 7-segment or LED bar indicators. The CRC peripheral detects inadvertent Flash corruption in the long-life appliances, and the WWDT guards against code lockups. Operating from -40C to +85C industrial range, the part withstands kitchen and laundry environments. The 7 KB Flash holds menu state machines and timing profiles for typical wash cycles.
Recommended
Industrial Sensor Conditioning
The PIC16F1618T-I/GZ fits compact industrial sensor-conditioning modules that need on-chip signal processing without a full Cortex-M MCU. The 24-bit SMT measures pulse-train sensors (flow meters, proximity switches) with high resolution. The 10-bit ADC combined with the internal 32 MHz oscillator provides responsive measurement while keeping BOM small. The ZCD peripheral handles line-frequency-based sensors in mains-powered installations. With 7 KB Flash and 512 bytes of SRAM the part is sufficient for protocol translation (e.g., UART-to-Modbus) and local calibration storage in EEPROM.
Recommended
Consumer Appliance Timer Module
The PIC16F1618T-I/GZ suits retrofit timer modules in coffee makers, air purifiers, and slow cookers, where it replaces legacy 4-bit controllers with modern Flash-based firmware. The 32 MHz instruction rate runs real-time scheduling and PWM output for heating elements or fans. The 10-bit ADC monitors thermistor inputs for closed-loop temperature control. The 20-UQFN 4x4 mm package is small enough to fit inside legacy through-hole timer housings. Per Microchip's low-power application notes, the XLP sleep modes drop quiescent current below 1 uA during standby, supporting Energy Star standby budgets.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1618T-I/GZ โ comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1619T-I/GZ | PIC16F1509T-I/GZ | PIC16F1575T-I/JQ | PIC16F1615T-I/SL |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-UQFN (4x4) | 20-UQFN (4x4) - same | 20-UQFN (4x4) - same | 16-UQFN - different | SOIC-14 - different |
| Flash Memory | 7 KB (4K x 14) | 16 KB (8K x 14) | 8 KB | 14 KB | 4 KB |
| SRAM | 512 bytes | 1 KB | 512 bytes | 1 KB | 256 bytes |
| Maximum Clock Frequency | 32 MHz | 32 MHz | 20 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Zero-Cross Detection (ZCD) | Yes | Yes | No | No | Yes |
| 24-bit SMT | Yes | Yes | No | Yes | Yes |
| Unit Price (1000 qty, USD) | 1.21 | 1.55 | 1.10 | 1.30 | 1.05 |
Key Differentiators
- Larger Flash in the same 20-UQFN footprint than PIC16F1615 (vs PIC16F1615T-I/SL)
- ZCD + 24-bit SMT in the same footprint as PIC16F1509 (vs PIC16F1509T-I/GZ)
- Cost-optimized vs higher-Flash PIC16F1619 (vs PIC16F1619T-I/GZ)
Design Notes
The PIC16F1618T-I/GZ VDD range is 2.3V to 5.5V. For 3.3V applications a simple low-dropout linear regulator such as MCP1700 is sufficient. Add a 100 nF decoupling capacitor as close as possible to the VDD pin and a 10 uF bulk capacitor at the regulator output. The exposed thermal pad on the 20-UQFN package must be soldered to a grounded copper pour to meet thermal and EMI expectations - per Microchip soldering recommendations for UQFN packages.
Use a 4-layer PCB stack-up with a continuous ground plane beneath the MCU to minimize EMI on the 32 MHz internal oscillator traces. Route ICSP programming lines (ICSPDAT/RA0, ICSPCLK/RA1) with short, direct traces to a 6-pin header, and place the header at the PCB edge for in-circuit programming access. For high-speed peripherals driven by PPS, route the assigned GPIO traces together to keep signal paths symmetric.
When migrating code from PIC16F1615 to PIC16F1618, note the increased Flash (7 KB vs 4 KB) and SRAM (512 B vs 256 B) - update linker scripts in MPLAB X accordingly. The PIC16F1618 adds CRC with memory-scan and WWDT - configure these in the configuration words before enabling interrupts, or unexpected resets can occur at first power-up. Per Microchip errata DS80000796, review the latest silicon errata for the PIC16F161X family before locking firmware.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this is an industrial-grade (-40C to +85C) MCU; for automotive applications use a Q-graded PIC16 variant.
