PIC16LF1614-I/ML - 8-bit 32MHz 7KB Flash MCU | Microchip XLP
MPN: PIC16LF1614-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.32 | $13.20 |
| 100 | $1.18 | $118.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.93 | $930.00 |
PIC16LF1614-I/ML Overview
What is an 8-bit microcontroller? An 8-bit MCU is a single-chip computer that processes data in 8-bit chunks, executing instructions from on-chip Flash memory. It belongs to the hierarchy: microcontroller -> embedded controller -> semiconductor -> integrated circuit. The 'LF' suffix in PIC16LF1614 indicates the low-power (F) process variant, supporting operation down to 1.8V and enabling Microchip's eXtreme Low Power (XLP) technology. PIC16 Family variants such as the 'F1614 are part of Microchip's enhanced mid-range core architecture.
Key features include 7 KB Flash, 512 bytes RAM, 12 I/O pins, a 10-bit ADC with Zero-Cross Detection (ZCD), Windowed Watchdog Timer (WWDT), CRC/Scan, 24-bit Signal Measurement Timer (SMT), and an integrated temperature indicator. The device operates from 1.8V to 3.6V (LF variant) and supports active current consumption in the microamp range when peripherals are switched off. The 16-pin QFN (4x4) exposed-pad package offers a compact footprint suitable for space-constrained designs and provides enhanced thermal dissipation through the exposed pad.
Technically, the PIC16LF1614 uses Microchip's enhanced mid-range 14-bit instruction set with a 16-level hardware stack and vectored interrupts. The peripheral set includes two 10-bit PWMs, a Complementary Waveform Generator, Configurable Logic Cell (CLC), and the unique Zero-Cross Detect module for AC line voltage zero-crossing detection without external optocouplers. The internal 32 MHz oscillator is factory calibrated to ±1%.
Typical applications include small motor control (fans, pumps, low-side/H-bridge drivers), AC-powered lighting and appliance control, capacitive-touch user interfaces, sensor nodes for IoT, and battery-powered low-duty-cycle devices where XLP sleep currents below 50 nA extend operating life. The ZCD module simplifies TRIAC dimmer designs by detecting mains zero crossings directly.
Design consideration: the exposed pad on the QFN package must be soldered to the PCB ground plane for electrical and thermal performance. The microcontroller cannot start without a valid configuration word; designers should configure FEXTOSC and WDTE early in firmware. The 32 MHz internal oscillator allows a one-to-one MCU enables VREG-driven core voltage regulator, eliminating the need for an external LDO when running from a single Li-ion or 3.3V supply.
This page synthesizes distributor pricing, drop-in alternatives from Microchip's PIC16 family, and practical design notes for low-power embedded designs not found in the manufacturer datasheet.
Drop-in alternatives for PIC16LF1614-I/ML — 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 PIC16LF1614-I/ML (same form factor and footprint) — differing in Package, Program Memory (Flash), ADC, Operating Temperature, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1614-I/ML
✅ Drop-In✓ In Stock
$0.91 / Unit
View Datasheet →PIC16F1614T-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1614-E/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF1554-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.84 / Unit
View Datasheet →PIC16LF1518-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.82 / Unit
View Datasheet →PIC16LF1574-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16LF1614-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC enhanced mid-range 8-bit |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data RAM | 512 bytes |
| Maximum CPU Frequency | 32 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 12 |
| ADC | 10-bit |
| Zero-Cross Detect (ZCD) | 1 module |
| Windowed Watchdog Timer (WWDT) | Yes |
| CRC/Scan | Yes |
| Signal Measurement Timer (SMT) | 24-bit |
| Package | 16-pin QFN (4x4) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| Instruction Set | 14-bit enhanced mid-range |
| RoHS Status | Compliant |
PIC16LF1614-I/ML Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O pin / ADC input |
| Pin 2 | RA4 — Bidirectional I/O pin / ADC input |
| Pin 3 | RA3 — Bidirectional I/O pin / MCLR/VPP |
| Pin 4 | RA2 — Bidirectional I/O pin / ZCD output |
| Pin 5 | RA1 — Bidirectional I/O pin / ICSPCLK |
| Pin 6 | RA0 — Bidirectional I/O pin / ICSPDAT |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7 — Bidirectional I/O pin / ADC input |
| Pin 9 | RA6 — Bidirectional I/O pin / ADC input |
| Pin 10 | RC5 — Bidirectional I/O pin |
| Pin 11 | RC4 — Bidirectional I/O pin |
| Pin 12 | RC3 — Bidirectional I/O pin / ADC input |
| Pin 13 | RC2 — Bidirectional I/O pin / ADC input |
| Pin 14 | RC1 — Bidirectional I/O pin / ADC input |
| Pin 15 | RC0 — Bidirectional I/O pin / ADC input |
| Pin 16 | VDD — Positive supply voltage (1.8V to 3.6V) |
Typical Applications
PIC16LF1614-I/ML is suitable for 6 applications: AC Line Zero-Cross Dimmer, Small Motor Control (Fan/Pump), Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, Appliance Control with Safety Monitoring, LED Lighting Controller with Dimming.
AC Line Zero-Cross Dimmer
The PIC16LF1614's integrated Zero-Cross Detect (ZCD) module makes it ideal for AC line TRIAC-based dimmer designs in lighting and small appliance control. The ZCD peripheral senses AC mains zero crossings directly without an external optocoupler, reducing BOM cost and PCB area. With 32 MHz CPU performance, the PIC16LF1614 can compute phase-angle timing on the fly and execute smooth dimming ramps. The 7 KB program space holds a state machine plus soft-start/soft-end profiles, while the 10-bit ADC handles feedback from the load. Combined with XLP sleep current below 50 nA for standby operation, the part fits Energy Star standby requirements. Place the ZCD input on a dedicated pin with proper HV isolation circuitry.
Recommended
Small Motor Control (Fan/Pump)
The PIC16LF1614's 24-bit Signal Measurement Timer (SMT), complementary PWM outputs, and 32 MHz CPU make it well suited for closed-loop control of small brushed DC motors, fans, and pumps. The SMT captures tachometer feedback with sub-microsecond accuracy, while the 10-bit ADC reads current shunt voltage for torque limiting. With 7 KB Flash and 512 RAM, firmware fits PI-control loops plus fault detection logic. The LF voltage range (1.8V-3.6V) supports single-cell Li-ion or 2xAA battery operation in portable fans. The 16-pin QFN 4x4 package occupies only 16 mm² of PCB area, ideal for compact motor-driver boards.
Recommended
Battery-Powered IoT Sensor Node
The PIC16LF1614's XLP (eXtreme Low Power) technology delivers sleep currents below 50 nA, making it suitable for battery-powered IoT sensor nodes on coin-cell or 2xAA batteries. With 1.8V-3.6V operation, the part runs directly from a single Li-ion cell without a regulator. The 32 MHz CPU wakes quickly to process sensor data, then returns to sleep for years of battery life. The 10-bit ADC reads temperature, light, or motion sensors, while the Windowed Watchdog Timer ensures the firmware stays healthy in unattended deployments. The compact 4x4 mm QFN package suits size-constrained wearable and tracker designs.
Recommended
Capacitive Touch User Interface
The PIC16LF1614 supports mTouch capacitive touch sensing via its 10-bit ADC and Configurable Logic Cell (CLC), enabling touch buttons, sliders, and proximity sensors without external touch ICs. The 32 MHz core processes multiple touch channels in real time, while the 7 KB Flash holds touch-detection libraries and gesture recognition. XLP sleep currents below 50 nA enable battery-powered remote controls and wireless switches that wake on touch. The 12 I/O pins support up to 12 touch channels in a compact 16-pin QFN package, fitting behind glass or plastic panels with a single copper layer.
Recommended
Appliance Control with Safety Monitoring
The PIC16LF1614's Windowed Watchdog Timer (WWDT), CRC/Scan memory integrity check, and Zero-Cross Detect (ZCD) module make it well suited for IEC 60730-class safety monitoring in white goods and small appliances. The WWDT detects firmware lockups while the CRC/Scan verifies Flash integrity at startup. The ZCD simplifies AC line synchronization for TRIAC-driven heating elements or compressor control. With 7 KB Flash and 512 RAM, the part supports safety state machines plus application logic in compact 16-pin QFN form factor. Industrial temperature grade (-40C to +85C) supports garage and outdoor appliance environments.
Recommended
LED Lighting Controller with Dimming
The PIC16LF1614's combination of 10-bit ADC, complementary PWM, ZCD, and XLP sleep current enables smart LED driver and dimmer designs. The ZCD module synchronizes phase-angle TRIAC dimming for legacy wall dimmers, while the PWM outputs drive constant-current LED strings. The 10-bit ADC measures LED thermal feedback and ambient light for daylight harvesting. With 7 KB Flash, the controller fits Casambi, DALI, or 0-10V dimming protocol stacks in compact form factor. The 16-pin QFN 4x4 package fits behind standard wall switch plates.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1614-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1614-I/ML | PIC16F1614T-I/ML | PIC16F1614-E/ML | PIC16LF1554-I/ML | PIC16LF1518-I/ML | PIC16LF1574-I/ML |
|---|---|---|---|---|---|---|---|
| Package | 16-pin QFN (4x4) | 16-pin QFN (4x4) - same | 16-pin QFN (4x4) - same | 16-pin QFN (4x4) - same | 16-pin QFN (4x4) - same | 16-pin QFN (4x4) - same | 16-pin QFN (4x4) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 1.8V to 3.6V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
| Flash Memory | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB | 28 KB | 7 KB |
| RAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 1024 bytes | 512 bytes |
| Zero-Cross Detect | Yes (1 module) | Yes (1 module) | Yes (1 module) | Yes (1 module) | No | No | No |
| Windowed Watchdog (WWDT) | Yes | Yes | Yes | Yes | No | No | No |
| Signal Measurement Timer (SMT) | 24-bit | 24-bit | 24-bit | 24-bit | No | No | No |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Integrated Zero-Cross Detect (ZCD) module eliminates optocoupler BOM (vs PIC16LF1554-I/ML)
- Windowed Watchdog Timer (WWDT) for safety-critical applications (vs PIC16LF1574-I/ML)
- 24-bit Signal Measurement Timer (SMT) for precision pulse timing (vs PIC16LF1518-I/ML)
Design Notes
The 16-pin QFN (4x4) package has an exposed thermal pad on the underside that must be soldered to the PCB ground plane. Per Microchip QFN soldering guidelines, the pad should be connected to a copper pour of at least 16 mm² to ensure electrical grounding, mechanical reliability, and thermal dissipation. Missing solder joints on the exposed pad can cause erratic behavior or thermal stress failures under load. Use no-clean flux and follow the manufacturer's reflow profile.
Place 100 nF decoupling capacitors as close as possible to the VDD pin (pin 16) and a bulk capacitor (1-10 uF) on the VDD rail. Per Microchip layout guidelines, the VDD trace should be wide enough to handle peak current transients during ADC sampling and PWM switching. For battery-powered designs, add a 10 uF bulk to handle motor inrush; for line-powered designs, add additional filtering on the AC side.
Do not leave the MCLR pin (pin 3 / RA3) floating; tie it to VDD through a 10 kohm resistor, or configure it as an input in the configuration registers. The configuration word must be set correctly (FEXTOSC, WDTE, LVP, etc.) before firmware starts; verify the configuration word in the first instruction. The ZCD module needs external HV divider and clamp circuitry when sensing AC mains; do not connect it directly to mains voltage.
Route the ICSP programming pins (RA0/ICSPDAT, RA1/ICSPCLK) with short, direct traces to the programming header to avoid programming failures. Keep analog ADC traces away from PWM switching traces to minimize coupling; add a ground guard ring around sensitive analog inputs. The 32 MHz internal oscillator is factory calibrated to ±1% but can shift with temperature; use the SMT or Timer1 for precision timing applications.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this is a general-purpose MCU. Industrial temperature grade -40C to +85C. Choose PIC16F1614-E/ML for extended temperature applications.
