PIC16LF1705-I/SL - 8-Bit XLP MCU 14KB Flash 14-SOIC | Microchip
MPN: PIC16LF1705-I/SL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.48 | $14.80 |
| 100 | $1.31 | $131.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.07 | $1,070.00 |
PIC16LF1705-I/SL Overview
An 8-bit microcontroller (MCU) is a compact processor core with on-chip memory and peripherals, optimized for embedded control tasks where low cost, deterministic real-time response, and minimal power consumption outweigh raw computational throughput. The PIC16 architecture sits within the broader Microchip 8-bit hierarchy: PIC10/12/16/18 family → 8-bit MCU → microcontroller → embedded processor → semiconductor. LF variants specifically target the ultra-low-power XLP segment, typically drawing sub-microamp sleep currents suitable for coin-cell and Energy Harvest applications.
Key features of the PIC16LF1705 include 32 MHz operation, 14KB Flash with self-programmability, 1024 bytes SRAM, 8-channel 10-bit ADC, two on-chip operational amplifiers, two comparators, an 8-bit DAC, Zero-Cross Detect, Configurable Logic Cells (CLC), Complementary Output Generator (COG), Peripheral Pin Select (PPS), and eXtreme Low Power (XLP) sleep modes. These features are packaged in the 14-pin SOIC footprint for hand-solder-friendly prototyping.
Architecturally, the PIC16LF1705 uses a 14-bit instruction-word RISC core with hardware stack, hardware multiplier, and direct/indirect addressing. The Core Independent Peripherals (CLC, COG, Zero-Cross Detect) operate without CPU intervention, reducing latency and power consumption in motor control, lighting, and power-conversion feedback loops. PPS allows peripheral I/O remapping onto most GPIO pins, simplifying PCB layout and BOM.
Typical applications include battery-powered IoT sensor nodes, low-cost consumer appliances, LED lighting control with zero-cross detection, small brushed-DC motor control, remote controls, and energy-harvesting wireless switches. The on-chip op amps and comparators make it suitable for analog front-end conditioning without external amplifiers, reducing BOM cost and PCB area in space-constrained designs.
When designing with the PIC16LF1705-I/SL, observe the 1.8V to 3.6V supply range, ensure decoupling capacitors (typically 100 nF plus 1 µF bulk) are placed within 5 mm of VDD, and configure unused pins as outputs to minimize sleep current. The PPS feature lets you reassign peripheral outputs to nearly any digital pin, easing layout, but pinout diagrams for the SOIC-14 package remain fixed at the silicon level.
This page synthesizes distributor pricing, verified cross-reference drop-in alternatives, and practical design notes not found on the manufacturer datasheet cover page, helping sourcing engineers evaluate second-source options and OEM buyers compare lifecycle risk.
Drop-in alternatives for PIC16LF1705-I/SL — 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 PIC16LF1705-I/SL (same form factor and footprint) — differing in Core Architecture, ADC, Package, Program Memory (Flash), Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1704-I/SL
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16LF1704-E/SL
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC16LF1705-I/SL Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (14-bit instruction word) |
| Family | PIC® XLP™ 16F |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data Memory (SRAM) | 1024 bytes |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| ADC | 10-bit |
| On-Chip Operational Amplifiers | 2 |
| Comparators | 2 |
| 8-bit DAC | Yes |
| Core Independent Peripherals | CLC, COG/NCO, Zero-Cross Detect |
| Peripheral Pin Select (PPS) | Yes |
| Package | 14-SOIC (SL) 3.90 mm body |
| Pin Count | 14 |
| Operating Temperature | -40 °C to +85 °C (Industrial, I grade) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF1705-I/SL Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Pin 2 | RA5 — Bidirectional I/O, analog input, ZCD output |
| Pin 3 | RA4 — Bidirectional I/O, analog input |
| Pin 4 | RA3/MCLR/VPP — Bidirectional I/O, Master Clear (reset), programming voltage input |
| Pin 5 | RA2 — Bidirectional I/O, analog input, op-amp output |
| Pin 6 | RA1 — Bidirectional I/O, analog input, op-amp inverting input |
| Pin 7 | RA0 — Bidirectional I/O, analog input, op-amp non-inverting input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RB7 — Bidirectional I/O, ICSP data, PPS-remappable peripheral |
| Pin 10 | RB6 — Bidirectional I/O, ICSP clock, PPS-remappable peripheral |
| Pin 11 | RB5 — Bidirectional I/O, analog input, PPS-remappable peripheral |
| Pin 12 | RB4 — Bidirectional I/O, analog input, PPS-remappable peripheral |
| Pin 13 | RC2 — Bidirectional I/O, analog input, comparator output |
| Pin 14 | RC1 — Bidirectional I/O, analog input, comparator input |
Typical Applications
PIC16LF1705-I/SL is suitable for 6 applications: Battery-Powered IoT Sensor Node, LED Lighting Control with Zero-Cross Detection, Small Brushed-DC Motor Control, Remote Control and Wireless Switch, Low-Cost Consumer Appliance Control, Analog Front-End with On-Chip Op Amps.
Battery-Powered IoT Sensor Node
The PIC16LF1705-I/SL is well suited for coin-cell or 2xAA powered IoT sensor endpoints. Its 1.8V to 3.6V supply range matches lithium and alkaline chemistries directly, and the XLP sleep current of sub-µA extends battery life to multiple years. The 14 KB Flash accommodates sensor-protocol stacks such as Modbus RTU or small LoRaWAN device drivers, while the 1024 bytes SRAM buffers measurement payloads. The on-chip 10-bit ADC with internal voltage reference reads thermistor, photocell, or battery-monitor signals without external analog components, reducing BOM. The CLC peripheral wakes the CPU only when a configured event occurs, while the core remains in sleep — a key advantage for duty-cycled remote sensing where total average current must remain under 10 µA for years of battery life.
Recommended
LED Lighting Control with Zero-Cross Detection
The Zero-Cross Detect (ZCD) peripheral on the PIC16LF1705-I/SL eliminates external zero-cross circuitry in dimmer and TRIAC-controlled LED lamps. When combined with the COG peripheral, the MCU can drive power-FET switching at the AC line zero crossings without CPU intervention, freeing the core to handle DMX, DALI, or BLE commands. Operating from a capacitive-dropped 3.3 V rail, the LF1705 stays within its 1.8 V to 3.6 V range, and the 32 MHz HFINTOSC provides deterministic timing for phase-angle dimming calculations. The on-chip op amp can condition current-sense signals for constant-current regulation, replacing an external amplifier and reducing the BOM cost by roughly 15 cents per fixture in volume production.
Recommended
Small Brushed-DC Motor Control
The PIC16LF1705-I/SL drives small brushed-DC motors in consumer appliances, toys, and small appliances. The COG/NCO peripheral generates complementary PWM with dead-band control for H-bridge drivers without software latency, while the on-chip comparators handle back-EMF zero-crossing for sensorless commutation. The 10-bit ADC reads motor current for soft-start and stall protection, and the 8-bit DAC sets the speed reference. The 1.8 V to 3.6 V supply range supports direct 2-cell alkaline or single-cell Li-ION battery power. The 14-SOIC package allows hand-soldering during prototyping and rework on consumer-grade PCBs, which is essential for low-volume specialty motor products where automated assembly costs cannot be amortized.
Recommended
Remote Control and Wireless Switch
Energy-harvesting wireless switches and remote controls benefit from the PIC16LF1705-I/SL's XLP sleep modes and 1.8 V minimum supply voltage. Combined with an RF transmitter such as a sub-GHz SoC, the MCU can wake on a button press, transmit a coded packet, and return to deep sleep within microseconds — average current stays in the single-digit µA range, matching the energy budget of kinetic or piezoelectric harvesters. The CLC peripheral can debounce mechanical switches in hardware without CPU wakeup, preserving battery and harvest energy. The 14 KB Flash holds small proprietary or standardized RF protocols, while 1024 bytes SRAM is sufficient for packet assembly buffers.
Recommended
Low-Cost Consumer Appliance Control
Small kitchen and personal-care appliances — coffee grinders, blenders, electric toothbrushes, hair clippers — use the PIC16LF1705-I/SL as their main controller. The on-chip op amps sense motor current, the 10-bit ADC reads temperature sensors for safety cutoff, and the CLC implements timing logic for cleaning cycles. The 32 MHz HFINTOSC eliminates external timing components, and the wide 1.8 V to 3.6 V supply lets the design use 2-cell alkaline or single-cell Li-ION without a boost converter. The PIC XLP family's proven tooling ecosystem — MPLAB X IDE, XC8 compiler, and MPLAB Code Configurator — reduces development cost for consumer OEMs targeting sub-$30 retail price points.
Recommended
Analog Front-End with On-Chip Op Amps
Sensor signal-conditioning modules use the PIC16LF1705-I/SL's two integrated operational amplifiers to amplify low-level signals from photodiodes, strain gauges, or thermocouples before ADC sampling. Eliminating two external op-amp packages cuts BOM cost by approximately 20 cents and saves PCB area. The 10-bit ADC with internal voltage reference provides sufficient resolution for many measurement tasks, and the 8-bit DAC can drive excitation sources for ratiometric sensors like load cells. The wide 1.8 V to 3.6 V supply supports direct battery operation, and the PIC XLP sleep modes make this IC suitable for duty-cycled data loggers that wake periodically, take a measurement, transmit, and return to sleep.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1705-I/SL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1704-I/SL | PIC16LF1704-E/SL |
|---|---|---|---|
| Package | 14-SOIC (SL) | 14-SOIC (SL) - same | 14-SOIC (SL) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 7 KB (-50%) | 7 KB (-50%) |
| SRAM | 1024 bytes | 512 bytes (-50%) | 512 bytes (-50%) |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz |
| On-Chip Op Amps | 2 | 2 | 2 |
| Temperature Range | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +125 °C (E) |
Key Differentiators
- On-chip op amps eliminate external analog ICs (vs PIC16LF1704-I/SL)
- Wider temperature range option available (vs PIC16LF1704-E/SL)
- Same 14-SOIC footprint across I/E temperature grades (vs PIC16F1705-I/SL)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 1) and a 1 µF to 10 µF bulk capacitor near the MCU power input. For battery-powered designs, the LF family's deep-sleep current is in the nA range with RTC running, so use a high-impedance voltage divider or buffer for any always-on analog signal that could leak current through an unbuffered ADC channel during sleep.
The 14-SOIC (SL) package is 3.90 mm body width with 1.27 mm pin pitch. Standard SOIC-14 land pattern from IPC-7351 is recommended. Leave at least 0.5 mm clearance between package body and adjacent traces for hand-soldering rework. For RF-sensitive designs, keep the ICSP pins (RB6/RB7) away from analog input traces to reduce crosstalk during in-circuit programming.
Do not connect the MCLR pin (RA3, pin 4) directly to VDD without a pull-up resistor or proper reset circuit — MCLR is active-low and requires a defined logic level at startup. When migrating from the PIC16F1705 (F variant, 2.3 V to 5.5 V), verify your VDD rail stays above 2.3 V during brown-out or your LF part will reset while the F part continues running. Always configure unused pins as outputs low to minimize sleep current.
Compliance Information
RoHS and REACH compliance per Microchip product page; lead-free and halogen-free per datasheet. AEC-Q100 qualification not available for this part; automotive designs should consider PIC16F1705-E/SL (E-grade) or PIC16F1705T-E/SL with extended temperature rating.
