PIC16LF1705-E/SL - 8-bit 32MHz MCU, 14KB Flash 14-SOIC | Microchip
MPN: PIC16LF1705-E/SL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.28 | $1.28 |
| 10 | $1.18 | $11.80 |
| 100 | $1.04 | $104.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.83 | $830.00 |
PIC16LF1705-E/SL Overview
An 8-bit microcontroller (MCU) is a programmable logic device that fetches, decodes and executes single-byte instructions stored in non-volatile Flash memory. The PIC16F architecture uses a 14-bit instruction word with separate program and data buses (Harvard architecture) and provides deterministic interrupt response. Positioned inside the broader hierarchy of PIC microcontrollers, this device sits in the XLP mid-range tier that targets very low quiescent current and sleep currents down to the nanoampere range, which is critical for battery lifetime in IoT edge nodes, remote sensors and wearable applications.
Key features include 14 KB self-programmable Flash, 1024 bytes SRAM, hardware peripheral pin select for remapping digital peripherals to any I/O pin, up to 32 MHz internal oscillator, and on-chip op-amps. The 10-bit ADC is one of the key differentiating peripherals, allowing direct interface with analog sensors without external analog-front-end components. Together with CLC and COG, the device can implement state-machine logic, signal conditioning and waveform generation in hardware, offloading these tasks from the CPU and reducing firmware complexity.
Typical applications include low-power IoT sensor nodes, consumer remote controls, HVAC and small-appliance control, battery chargers, LED lighting drivers and general-purpose 8-bit embedded control. The combination of ultra-low sleep current, peripheral pin select, and integrated analog makes the PIC16LF1705 well suited to designs where PCB area, BOM count and standby power are all constrained. Designers should note that the LF (low-voltage) parts do not run reliably above 3.6V; for higher-voltage rails the non-LF PIC16F1705 variant should be considered. According to the Microchip PIC16(L)F1705/9 datasheet, the device includes an on-chip 32 MHz internal oscillator and supports in-circuit debugging via MPLAB ICD tools.
Drop-in alternatives for PIC16LF1705-E/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-E/SL (same form factor and footprint) — differing in ADC, Package, Program Memory (Flash), Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1705-I/SL
✅ Drop-In✓ In Stock
$1.07 / Unit
View Datasheet →PIC16F1705-I/SL
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16LF1704-I/SL
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16LF1704-E/SL
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →PIC16LF1575-E/SL
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF1705-E/SL Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 (Harvard) |
| Program Memory (Flash) | 14 KB (8K x 14 instructions) |
| Data Memory (SRAM) | 1024 bytes |
| Maximum CPU Frequency | 32 MHz |
| Supply Voltage Range | 1.8 V to 3.6 V (LF variant) |
| ADC | 10-bit, on-chip |
| Package | 14-pin SOIC (SL) |
| Operating Temperature Range | -40C to +125C (E suffix) |
| On-chip Peripherals | CLC, COG, Peripheral Pin Select, Op-Amps |
| Internal Oscillator | Yes, up to 32 MHz |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Low-Power Technology | XLP (eXtreme Low Power) |
PIC16LF1705-E/SL Pin Configuration
| Pin 1 | RA3/AN3/C1IN+/C12IN0-/CWG1FLT/CCP2/SS/CLKOUT/OP1-/T0CKI — Analog input 3 / CWG fault / SPI SS / Timer0 clock / Op-Amp 1 inverting input (multiplexed GPIO RA3) |
| Pin 2 | RA4/AN4/T1G/SDO/PWMA/OP1+ — Analog input 4 / Timer1 gate / SPI data out / PWM output / Op-Amp 1 non-inverting input (RA4) |
| Pin 3 | RA5/AN5/CLKIN/SDI/PWMB/OP1OUT — Analog input 5 / external clock in / SPI data in / PWM output / Op-Amp 1 output (RA5) |
| Pin 4 | RA0/AN0/C1OUT/OP2-/CCP1/ICSPDAT — Analog input 0 / comparator 1 out / Op-Amp 2 inverting input / ICSP data (RA0) |
| Pin 5 | RA1/AN1/C2OUT/OP2+/ICSPCLK — Analog input 1 / comparator 2 out / Op-Amp 2 non-inverting input / ICSP clock (RA1) |
| Pin 6 | RA2/AN2/C3IN0-/C2IN+/C1IN0-/COG1FLT/COG1OUT — Analog input 2 / CWG1 fault / COG1 output (RA2) |
| Pin 7 | VDD — Positive supply voltage (1.8V to 3.6V for LF variant) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RC0/AN6/C2IN-/INT/COG1IN0+/CLCIN0 — Analog input 6 / external interrupt / COG1 in / CLC in (RC0) |
| Pin 10 | RC1/AN7/C1IN1-/COG1IN1+/ZCD/CLCIN1 — Analog input 7 / CWG in / zero-cross detect / CLC in (RC1) |
| Pin 11 | RC2/AN8/C2IN1+/COG1IN2+/COG1IN0- — Analog input 8 / COG1 in (RC2) |
| Pin 12 | RC3/AN9/C1IN0-/C2IN0+/COG1IN1- — Analog input 9 / COG1 in (RC3) |
| Pin 13 | RC4/AN10/C1IN1+/C2IN1-/COG1IN2- — Analog input 10 / COG1 in (RC4) |
| Pin 14 | RC5/AN11/CCP1/COG1OUT/PWMA/CLCIN3 — Analog input 11 / COG1 out / PWM / CLC in (RC5) |
Typical Applications
PIC16LF1705-E/SL is suitable for 6 applications: Low-Power IoT Sensor Nodes, Consumer Remote Controls, HVAC and Appliance Control, Battery Charging and Power Management, LED Lighting Drivers, General 8-bit Embedded Control.
Low-Power IoT Sensor Nodes
The PIC16LF1705-E/SL fits IoT sensor-node designs because its XLP (eXtreme Low Power) technology delivers nanoampere sleep currents and the LF variant supports 1.8V to 3.6V operation, allowing direct connection to coin-cell or two-cell alkaline batteries. The integrated 10-bit ADC provides direct sensor interface for temperature, humidity, and analog sensor types without external signal conditioning. With 14 KB Flash and PPS, designers can run modular firmware that wakes periodically to sample sensors, transmit via UART-connected radio, and return to deep sleep for multi-year battery life. Unlike higher-voltage PIC16F parts, the LF part avoids LDO losses, extending runtime in energy-constrained deployments.
Recommended
Consumer Remote Controls
Consumer IR remote controls demand a low-cost MCU that survives years on a single coin cell. The PIC16LF1705-E/SL matches this profile because its 1.8V minimum supply eliminates the need for boost converters, and the 32 MHz internal oscillator provides sufficient throughput for IR modulation at standard 38 kHz carrier frequencies. The peripheral pin select lets designers remap the IR carrier generation to any GPIO, simplifying PCB layout. Its 14 KB Flash fits state-machine style decode and transmit firmware with margin, while the small 14-SOIC package keeps the BOM and assembly cost low for high-volume consumer SKUs.
Recommended
HVAC and Appliance Control
In HVAC and small appliance designs the PIC16LF1705-E/SL drives triac outputs, scans keypads and reads analog sensors while consuming minimal quiescent current in standby. The on-chip op-amps and configurable logic cells (CLC) implement hardware zero-cross detect and timer functions without firmware polling, while the complementary output generator (COG) produces dead-band-managed switching signals ideal for motor and triac control. The -40C to +125C E-grade temperature range supports appliance chassis environments, and the 14-SOIC package is robust enough for hand-soldered service replacements. Compared with discrete timers and op-amp implementations, this MCU reduces BOM and enables configurable end-of-line features.
Recommended
Battery Charging and Power Management
The PIC16LF1705-E/SL's 10-bit ADC, on-chip op-amps and CLC peripherals form a compact CC/CV battery charger controller for Li-ion and NiMH chemistries. The op-amps build the current-sense and voltage-sense feedback paths while CLC implements the PID-like regulation loop in hardware, leaving the CPU free for fuel gauging and LCD drive. With wide 1.8V-3.6V supply and low sleep current, the part suits battery-side operation where the same MCU powers from the cell and protects against over-discharge. The LF voltage range is a direct match for single-cell lithium chemistries and eliminates the need for an external LDO.
Recommended
LED Lighting Drivers
The PIC16LF1705-E/SL integrates logic and analog features that map naturally to LED driver requirements. The complementary output generator (COG) creates the dead-band-managed complementary PWM needed for synchronous buck or boost LED drivers, and the CLC cell can implement over-current protection without firmware intervention. The 10-bit ADC reads LED current-sense feedback for closed-loop dimming, while PPS makes routing the high-current FET gate signals to safe package pins straightforward. With its low quiescent current, drivers stay efficient even at zero dimming, and the 14-SOIC footprint keeps driver PCB area small.
Recommended
General 8-bit Embedded Control
For general purpose 8-bit embedded control the PIC16LF1705-E/SL provides 14 KB Flash, 1024 bytes RAM, 32 MHz throughput and a versatile peripheral mix at a low unit cost. Common tasks such as keypad scanning, LCD segment driving, sensor aggregation, simple protocol bridging (UART/SPI/I2C) and actuator control fit comfortably in 14 KB of code. Designers migrating from older PIC16F mid-range parts benefit from PPS for cleaner PCB layouts, and firmware written in MPLAB XC8 typically generates compact code that fits within Flash capacity. The 14-SOIC package and well-supported toolchain (MPLAB X, PICkit, Curiosity) make this part an accessible entry point for new 8-bit designs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1705-E/SL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1705-I/SL | PIC16F1705-I/SL | PIC16LF1704-I/SL | PIC16LF1704-E/SL |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-SOIC (SL) | 14-SOIC (SL) - same | 14-SOIC (SL) - same | 14-SOIC (SL) - same | 14-SOIC (SL) - same |
| Flash Memory | 14 KB | 14 KB | 14 KB | 7 KB (-50%) | 7 KB (-50%) |
| SRAM | 1024 bytes | 1024 bytes | 1024 bytes | 512 bytes (-50%) | 512 bytes (-50%) |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Max Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Lowest voltage range in the family for direct battery operation (vs PIC16F1705-I/SL)
- Extended -40C to +125C E-grade temperature rating (vs PIC16LF1705-I/SL)
- Same peripheral set as PIC16LF1709 in smaller footprint (vs PIC16LF1709-E/SL)
Design Notes
Decouple VDD with a 0.1uF ceramic capacitor placed within 5 mm of the VDD pin (pin 7) and an additional 1uF bulk capacitor on the same node. For battery designs, a 1uF+0.1uF bulk-plus-bypass combination on VDD stabilizes the LF supply rail during ADC conversions and reduces core voltage transients caused by digital switching. Verify the bypass capacitors operate at the chosen oscillator frequency; X7R/X5R ceramics are recommended for low self-discharge during deep sleep states.
Keep the ICSP/PGD (RA0/ICSPDAT) and ICSP/PGC (RA1/ICSPCLK) traces short and away from high-current switching paths. The 14-SOIC package has limited thermal dissipation; solder-pad copper pours on VSS and VDD should extend at least 25 mm^2 each under continuous AC-line-coupled switching, even though total power dissipation in 8-bit PIC16 LF parts typically stays below 100 mW. Reserve layout space for a 4-pin ICSP header to enable MPLAB ICD in-circuit debugging on production prototypes.
Do not exceed 3.6V on VDD of the LF variant - the PIC16LF1705-E/SL lacks the 5V-tolerant internal regulator of the F variant and will latch up if the supply overshoots. When migrating firmware from PIC16LF1704 to PIC16LF1705, watch for memory-map changes because the 7 KB Flash base differs from the 14 KB base. Estimate the typical deep-sleep current at room temperature using the OSCCON register setting - leaving peripherals clocked during sleep significantly increases quiescent draw and can shorten battery life by weeks.
Compliance Information
RoHS compliance and lead-free status per Microchip product page; AEC-Q100 status not stated in the provided web data and not_applicable rating here is a conservative default - confirm with Microchip for automotive qualifications
