PIC16LF1618-I/ML - 8-Bit 32MHz XLP MCU, 7KB Flash | Microchip
MPN: PIC16LF1618-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.38 | $138.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.02 | $1,020.00 |
PIC16LF1618-I/ML Overview
An 8-bit PIC microcontroller (MCU) is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, integrating program Flash, data SRAM, data EEPROM, peripherals, and I/O on a single die. The PIC16 core is the mid-range tier of Microchip's 8-bit portfolio, sitting between the baseline PIC10/12/16 and the enhanced PIC18 families, and is widely used for sensor interfacing, simple motor control, and low-power IoT edge nodes. The PIC16LF1618 specifically belongs to the PIC16(L)F161X family, which targets closed-loop control of small motors, lighting, and general-purpose embedded designs.
Key features of this device include a 10-bit A/D converter with up to 12 channels, a 24-bit Signal Measurement Timer (SMT) for precision timing, Capture/Compare/PWM (CCP) modules, Zero Cross Detect (ZCD) for AC line control, and a hardware Peripheral Pin Select (PPS) that remaps digital peripherals to any I/O. The XLP sleep current is specified down to sub-µA levels, with multiple power-managed operating modes. The QFN-20 (4x4) package provides a small footprint suited to space-constrained designs while exposing the thermal pad to the PCB for low thermal resistance.
Typical applications include low-power IoT sensor nodes, fan/blower motor control, AC zero-crossing solid-state relay (SSR) control, LED driver controllers, battery-powered consumer appliances, and home-automation peripherals. The 10-bit ADC plus 24-bit SMT combination also makes it suitable for energy-metering and sensor-signal-conditioning front-ends.
When designing with the PIC16LF1618-I/ML, ensure the decoupling network (typically 100 nF plus 1 µF) is placed within a few millimetres of VDD/VSS pins, and stitch the exposed pad (EP) to a continuous ground plane for thermal dissipation and electrical return. Configure the PPS only after committing peripheral-to-pin assignments because remapping occurs at runtime and conflicts will silently disable the affected peripheral.
Drop-in alternatives for PIC16LF1618-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 PIC16LF1618-I/ML (same form factor and footprint) — differing in Package, Program Memory (Flash), ADC, Core Architecture, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1619-I/ML
✅ Drop-In✓ In Stock
$1.32 / Unit
View Datasheet →PIC16F1618-I/ML
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF1618T-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1518-I/ML
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →PIC16LF1554-I/ML
✅ Drop-In✓ In Stock
$0.84 / Unit
View Datasheet →PIC16LF1454-I/ML
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC16LF1618-I/ML Maximum Ratings & Electrical Characteristics
| Core | PIC16 8-bit RISC |
| CPU Speed (Max) | 32 MHz |
| Instruction Set Architecture | Harvard, RISC, 14-bit instruction word |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data SRAM | 512 bytes |
| Data EEPROM | 512 bytes |
| Operating Voltage Range | 1.8 V to 3.6 V |
| ADC | 10-bit, multiple channels |
| Timers | Includes 24-bit Signal Measurement Timer (SMT) |
| PWM / CCP | CCP modules + enhanced PWM |
| Zero Cross Detect (ZCD) | Yes (AC line control) |
| Peripheral Pin Select (PPS) | Yes |
| Package | 20-pin QFN (4x4 mm) with Exposed Pad |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Low-Power Technology | XLP (eXtreme Low Power) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16LF1618-I/ML Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O / analog input |
| Pin 2 | RA4 — Bidirectional I/O / analog input |
| Pin 3 | RA3 — Bidirectional I/O / analog input / MCLR |
| Pin 4 | RA2 — Bidirectional I/O / analog input |
| Pin 5 | RA1 — Bidirectional I/O / analog input / ICSPCLK |
| Pin 6 | RA0 — Bidirectional I/O / analog input / ICSPDAT |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7 — Bidirectional I/O / DAC / analog input |
| Pin 9 | RA6 — Bidirectional I/O / analog input |
| Pin 10 | RC5 — Bidirectional I/O / PWM output |
| Pin 11 | RC4 — Bidirectional I/O / PWM output |
| Pin 12 | RC3 — Bidirectional I/O / analog input / SCL |
| Pin 13 | RC2 — Bidirectional I/O / analog input |
| Pin 14 | RC1 — Bidirectional I/O / analog input / SDA |
| Pin 15 | RC0 — Bidirectional I/O / analog input |
| Pin 16 | RB7 — Bidirectional I/O |
| Pin 17 | RB6 — Bidirectional I/O / ICSPCLK |
| Pin 18 | RB5 — Bidirectional I/O |
| Pin 19 | RB4 — Bidirectional I/O |
| Pin 20 | VDD — Positive supply voltage |
Typical Applications
PIC16LF1618-I/ML is suitable for 7 applications: Low-Power IoT Sensor Nodes, Small BLDC / DC Motor Control, AC Zero-Cross Solid-State Relay, LED Lighting Controllers, Battery-Powered Consumer Appliances, Home Automation / Smart Home Sensors, Energy Metering Front-End.
Low-Power IoT Sensor Nodes
The PIC16LF1618-I/ML's XLP technology delivers sub-µA sleep current at 1.8 V-3.6 V, making it well-suited for coin-cell or energy-harvesting sensor nodes. Its 7 KB Flash accommodates BLE/Zigbee driver stacks while the 10-bit ADC reads thermistor, photodiode, or battery-voltage sense signals. Pair with a sleep-capable radio and configure the RTC interrupt to wake the MCU every few seconds for periodic readings, then return to deep sleep - preserving years of battery life on a single CR2032 cell.
Recommended
Small BLDC / DC Motor Control
With ECCP PWM, 24-bit SMT, and 10-bit ADC, the PIC16LF1618-I/ML can drive small brushless DC or brushed DC motors in fans, blowers, and pumps. The ZCD input simplifies AC-line-synchronous start, while SMT captures Hall-sensor or back-EMF edges at sub-microsecond precision. The wide-voltage core tolerates noisy motor supplies, and 32 MHz throughput leaves headroom for closed-loop PID math on each PWM cycle.
Recommended
AC Zero-Cross Solid-State Relay
The integrated Zero Cross Detect (ZCD) peripheral makes PIC16LF1618-I/ML an excellent fit for AC-line SSR control, dimmers, and motor soft-start circuits. The ZCD hardware triggers an interrupt at every AC zero crossing without CPU overhead, allowing the firmware to gate a TRIAC or MOSFET with minimal EMI. The 1.8 V-3.6 V core simplifies interface to logic-level opto-isolated gate drivers used for safety isolation across the AC barrier.
Recommended
LED Lighting Controllers
The PIC16LF1618-I/ML's ECCP PWM modules can drive multiple LED channels with hardware-generated PWM, freeing the CPU for color-mixing or DMX/RDM protocol parsing. The 10-bit ADC reads ambient-light sensors for daylight harvesting and feedback loops. XLP sleep mode enables standby power below 100 µA for compliance with energy-efficiency regulations like Energy Star and EU Ecodesign lighting directives.
Recommended
Battery-Powered Consumer Appliances
Cordless toothbrushes, shavers, and personal-care appliances benefit from PIC16LF1618-I/ML's 1.8 V-3.6 V operation directly from a Li-ion cell. The 7 KB Flash handles motor-control firmware plus user-interface state machines, and the XLP sleep mode extends standby shelf-life past 12 months. The 20-QFN (4x4 mm) package fits inside slim ergonomic enclosures, and PPS allows flexible pinout routing around the industrial design.
Recommended
Home Automation / Smart Home Sensors
PIR occupancy, door/window contact, leak-detection, and air-quality sensors in home automation networks pair naturally with PIC16LF1618-I/ML. Its wide voltage range accepts 2x AAA or 2x AA battery packs, while XLP sleep plus interrupt-driven wake minimizes average current below 10 µA for multi-year battery life. UART, SPI, and I2C peripherals connect to common sub-GHz or BLE modules, and the 7 KB Flash holds application firmware plus a custom RF protocol stack.
Recommended
Energy Metering Front-End
The 24-bit Signal Measurement Timer (SMT) enables precision pulse counting for utility-meter and sub-meter designs using PIC16LF1618-I/ML. Combined with the 10-bit ADC for voltage and current sensing, the MCU can implement single-phase energy measurement with class-1 accuracy. EEPROM stores calibration coefficients and tamper logs across decades of deployment, and the 20-QFN form factor drops onto compact metering PCBs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1618-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1619-I/ML | PIC16F1618-I/ML | PIC16LF1618T-I/ML | PIC16LF1518-I/ML | PIC16LF1554-I/ML | PIC16LF1454-I/ML |
|---|---|---|---|---|---|---|---|
| Package | 20-QFN (ML) 4x4 mm | 20-QFN (ML) - same | 20-QFN (ML) - same | 20-QFN (ML) - same | 20-QFN (ML) - same | 20-QFN (ML) - same | 20-QFN (ML) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 2.3 V - 5.5 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 5.5 V |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 20 MHz | 32 MHz | 48 MHz |
| Flash Memory | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 7 KB (4K x 14) | 16 KB | 3.5 KB | 7 KB |
| SRAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 1 KB | 256 bytes | 1 KB |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Zero Cross Detect (ZCD) | Yes | Yes | Yes | Yes | No | No | No |
| Signal Measurement Timer (24-bit SMT) | Yes | Yes | Yes | Yes | No | No | No |
| USB Support | No | No | No | No | No | No | Yes |
Key Differentiators
- Integrated Zero Cross Detect (ZCD) peripheral (vs PIC16LF1518-I/ML)
- 24-bit Signal Measurement Timer (SMT) (vs PIC16LF1554-I/ML)
- Wide voltage range 1.8 V - 3.6 V (LF variant) (vs PIC16F1618-I/ML)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 2-3 mm of the VDD pin (pin 20) and a bulk 1-10 µF capacitor on the same node. The 1.8 V-3.6 V core draws tens of µA in active mode at 32 MHz, but XLP sleep current drops below 1 µA when properly configured. Configure the BOR (Brown-Out Reset) module to the minimum system voltage to prevent Flash corruption during power-down events.
Estimated: at maximum operating voltage 3.6 V and 32 MHz active mode, the PIC16LF1618-I/ML draws approximately 6-8 mA, dissipating under 30 mW which is negligible. The 20-QFN package with exposed pad (EP) soldered to a continuous ground plane achieves theta_JA under 40 C/W - typically no heatsink is required. Always stitch multiple thermal vias through the EP to the inner ground plane for production designs.
The exposed thermal pad (EP) of the 20-QFN must be soldered to a copper pour on the PCB, with a recommended via-array of 5-9 thermal vias to inner ground layers for heat sinking and ground return. Route PPS-mapped signals on inner layers to avoid pin-side congestion. Keep the HFINTOSC-sensitive traces short; the internal oscillator is reasonably noise-tolerant but crystal-accurate timing on UART/I2C benefits from a guarded ground around the MCU.
Do not skip the PPS unlock sequence - assignments are silently ignored if the IOLOCK bit is set. The ZCD pin must be calibrated per the datasheet; uncalibrated ZCD thresholds shift with temperature and may misfire. When migrating from PIC16F1618 to PIC16LF1618, verify the lower voltage limit (1.8 V vs 2.3 V) does not violate brown-out or ADC reference specifications. Always tie unused I/O pins to defined logic levels to minimize sleep current leakage.
Compliance Information
RoHS and REACH compliant per Microchip product page and DigiKey listing. Not AEC-Q100 qualified - for automotive designs choose a PIC16F1618-E/ML or PIC16F1618T-I/ML automotive-grade variant. Halogen-free per Microchip package materials declaration.
