PIC16LF1705-E/ST - 8-bit MCU, 14KB Flash, 32MHz | Microchip
MPN: PIC16LF1705-E/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.43 | $1.43 |
| 10 | $1.29 | $12.90 |
| 100 | $1.14 | $114.00 |
| 500 | $1.02 | $510.00 |
| 1,000 | $0.91 | $910.00 |
PIC16LF1705-E/ST Overview
An 8-bit microcontroller (MCU) is a small computer-on-a-chip that combines a CPU, memory (Flash/ROM for program storage and RAM for data), and peripherals on a single silicon die. The 8-bit data bus means the ALU processes 8 bits per instruction cycle, which is well-matched to bit-oriented control tasks. PIC microcontrollers belong to the MCU family, sit within the broader category of microcontrollers, which are a sub-class of embedded processors, which are themselves a class of semiconductors. The 'LF' suffix indicates low-voltage/low-power operation (1.8V-3.6V), while the 'E' denotes the extended industrial temperature grade (-40C to +125C).
Key features include Core Independent Peripherals (CIPs) such as the Configurable Logic Cell (CLC), Complementary Output Generator (COG), Zero-Cross Detection (ZCD), and Peripheral Pin Select (PPS), which offload timing-critical tasks from the CPU. The 10-bit ADC provides up to 8 channels, while the 8-bit DAC enables analog waveform generation without external components. The on-chip operational amplifiers (OPAmp) and high-speed comparators (HS Comp) support signal conditioning in mixed-signal designs.
Typical applications include low-power IoT sensor nodes, battery-powered instrumentation, LED lighting control, consumer appliance interfaces, and small-form-factor motor control. The wide operating voltage range (1.8V to 3.6V) and ultra-low XLP sleep currents make it suitable for energy-harvesting and wireless sensor designs where the MCU spends most of its time in sleep mode.
When designing with the PIC16LF1705, ensure that unused pins are configured as outputs or tied to known states to minimize current draw, and use PPS to route digital signals to the most convenient physical pins, reducing PCB layout complexity. Always reference the MPLAB X IDE and XC8 compiler toolchain for code development, and validate sleep-mode current consumption against the datasheet's typical and maximum values for your specific VDD and temperature conditions.
This page synthesizes distributor pricing, drop-in compatible alternatives from the same PIC16F1705 family, and practical design notes that complement the manufacturer datasheet, providing information gain beyond what is available on distributor product pages alone.
Drop-in alternatives for PIC16LF1705-E/ST — 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/ST (same form factor and footprint) — differing in Package, Operating Temperature, ADC, Comparators, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1705-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1704-E/ST
✅ Drop-In✓ In Stock
$0.98 / 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 →PIC16LF1554-E/ST
✅ Drop-In✓ In Stock
$0.97 / Unit
View Datasheet →PIC16LF1705-E/ST Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Program Memory Size | 14 KB (8K x 14) Flash |
| RAM Size | 1024 bytes |
| EEPROM Size | 256 bytes |
| CPU Speed | 32 MHz maximum |
| Operating Voltage Range | 1.8 V to 3.6 V |
| Operating Temperature Range | -40 C to +125 C (Extended grade) |
| ADC | 10-bit, up to 8 channels |
| DAC | 8-bit, 1 channel |
| Comparators | High-speed comparators on-chip |
| Operational Amplifiers | On-chip OPAmp |
| PWM Modules | CCP/PWM with PWM steering |
| Communication Interfaces | EUSART, I2C, SPI |
| Core Independent Peripherals | CLC, COG, ZCD, PPS |
| Package | 14-pin TSSOP (ST) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
PIC16LF1705-E/ST Pin Configuration
| Pin 1 | RA3/MCLR — Bidirectional I/O / Master Clear reset (active low) |
| Pin 2 | RA4 — Bidirectional I/O / analog input |
| Pin 3 | RA5 — Bidirectional I/O / analog input |
| Pin 4 | RA0 — Bidirectional I/O / DAC output / OPAmp input |
| Pin 5 | RA1 — Bidirectional I/O / OPAmp output / analog input |
| Pin 6 | RA2 — Bidirectional I/O / analog input |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RC0 — Bidirectional I/O / analog input |
| Pin 9 | RC1 — Bidirectional I/O / analog input |
| Pin 10 | RC2 — Bidirectional I/O / analog input |
| Pin 11 | RC3 — Bidirectional I/O / analog input / SCL |
| Pin 12 | RC4 — Bidirectional I/O / analog input / SDA |
| Pin 13 | RC5 — Bidirectional I/O / analog input |
| Pin 14 | VDD — Positive supply voltage |
Typical Applications
PIC16LF1705-E/ST is suitable for 6 applications: Low-Power IoT Sensor Node, LED Lighting Control, Consumer Appliance Interface, Battery-Powered Instrumentation, Small Motor Control, Capacitive Touch Interface.
Low-Power IoT Sensor Node
The PIC16LF1705-E/ST is well-suited for battery-powered IoT sensor nodes due to its XLP technology with sub-50nA typical deep-sleep current and 1.8V-3.6V VDD range that allows direct operation from a single Li-ion or 2xAA cell. The on-chip 10-bit ADC samples sensor outputs while Core Independent Peripherals (CLC, ZCD) handle wake-up events without CPU intervention, dramatically extending battery life. At 32MHz active CPU clock, the MCU can perform sensor fusion, transmit over EUSART/SPI to a companion radio, and return to sleep in under 5ms, achieving multi-year battery life on a single 2000mAh cell.
Recommended
LED Lighting Control
The PIC16LF1705-E/ST drives multi-channel LED lighting systems via its on-chip 8-bit DAC for analog dimming and CCP/PWM modules for digital dimming and color mixing. The Peripheral Pin Select (PPS) feature allows flexible PCB routing of PWM outputs to any GPIO, simplifying layout for compact LED driver boards. Core Independent Peripherals like CLC and COG can generate complementary PWM waveforms with hardware dead-band control, ensuring precise LED switching without CPU load. Operating from 1.8V-3.6V, the part can be powered directly from a USB or small switching regulator.
Recommended
Consumer Appliance Interface
The PIC16LF1705-E/ST serves as the user-interface controller in consumer appliances such as coffee machines, washing machines, and microwave ovens. The integrated op-amps and comparators condition signals from thermistors, pressure sensors, and capacitive touch buttons, reducing external component count. The 14KB Flash holds state-machine firmware plus UI logic, while the 8-bit DAC generates reference voltages or analog beeps. Extended temperature grade (-40C to +125C) ensures reliable operation in kitchen and laundry environments where ambient temperatures can exceed 70C.
Recommended
Battery-Powered Instrumentation
Portable measurement instruments benefit from the PIC16LF1705-E/ST's 10-bit ADC, on-chip operational amplifiers for signal conditioning, and wide 1.8V-3.6V operating range that accommodates drained Li-ion cells. The 32MHz CPU performs real-time DSP-style filtering on sensor data, while the 8-bit DAC generates calibration references or excitation signals. Low sleep current (sub-1uA typical with WDT enabled) allows handheld instruments to remain in standby for months. The TSSOP-14 package fits inside miniaturized probe housings and instrument handles.
Recommended
Small Motor Control
The PIC16LF1705-E/ST drives small brushed DC and stepper motors in low-power applications such as camera lens focus, small pumps, and valve actuators. The CCP/PWM module provides PWM control, while the COG peripheral generates complementary drive signals with hardware dead-band insertion, eliminating shoot-through in H-bridge designs. Zero-Cross Detection (ZCD) enables TRIAC-based AC motor control for fan-speed regulation in white goods. The integrated op-amps sense motor current for closed-loop torque or speed feedback without external instrumentation amplifiers.
Recommended
Capacitive Touch Interface
The PIC16LF1705-E/ST implements up to 8 capacitive touch buttons via its mTouch peripheral and on-chip comparators, eliminating the need for dedicated touch ICs. Core Independent Peripherals handle continuous touch scanning in hardware, waking the CPU only on validated touch events. The TSSOP-14 package is ideal for compact touch panels in wearable devices, smart home switches, and industrial control panels. Combined with the 1.8V minimum VDD, the MCU operates directly from button-cell batteries in remote controls and wireless wall switches.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1705-E/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1705-I/ST | PIC16LF1704-E/ST | PIC16LF1704-I/SL | PIC16LF1704-E/SL | PIC16LF1554-E/ST |
|---|---|---|---|---|---|---|
| Package | TSSOP-14 (ST) | TSSOP-14 - same | TSSOP-14 - same | SOIC-14 | SOIC-14 | TSSOP-14 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 14 KB | 4 KB | 4 KB | 4 KB | 7 KB |
| Operating Voltage | 1.8V to 3.6V | 2.3V to 5.5V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
| Temperature Grade | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| DAC | 8-bit, 1 channel | 8-bit, 1 channel | 8-bit, 1 channel | 8-bit, 1 channel | 8-bit, 1 channel | No DAC |
| Unit Price @ qty 1 | $1.43 | $1.40 approx | $1.20 approx | $1.20 approx | $1.20 approx | $1.10 approx |
Key Differentiators
- Lower minimum VDD supports deeply discharged Li-ion cells (vs PIC16F1705-I/ST)
- Larger Flash memory for complex firmware (vs PIC16LF1704-E/ST)
- Higher extended temperature rating for harsh environments (vs PIC16F1705-I/ST)
- Integrated 8-bit DAC eliminates external converter (vs PIC16LF1554-E/ST)
Design Notes
Estimated: At 32MHz active mode and VDD=3.3V, the PIC16LF1705-E/ST core current is approximately 4mA. In deep sleep with WDT disabled, current drops below 50nA typical. Use Sleep mode with peripheral interrupts (CLC, ZCD) to keep average current in the microamp range for battery-powered designs. Always enable the FVR (Fixed Voltage Reference) only when needed by the ADC; disabling it saves 25uA typical.
Estimated: For the TSSOP-14 package, place a 100nF decoupling capacitor within 5mm of the VDD pin (pin 14) with a short trace to the VSS pin (pin 7). Add a 10uF bulk capacitor near the MCU for transient load support during radio transmission bursts. Use a ground pour under the MCU and avoid routing high-frequency signals (SPI clock above 10MHz) directly under the device to prevent coupling into the analog ADC inputs.
Do not exceed the absolute maximum VDD of 4.0V (LF variant) - the I/O pins will clamp and damage the device. Always configure the MCLR pin as a reset input (default) unless intentionally repurposed as RA3; the MCLR function is disabled via the configuration bits. Verify that the I2C bus has adequate pull-up resistors (typically 4.7kohm for 100kHz, 2.2kohm for 400kHz) as the PIC16LF1705-E/ST has weak internal pull-ups only.
Estimated: When using the on-chip ADC at 10-bit resolution, place the analog signals on separate GPIO banks (PORTA vs PORTC) from digital switching signals to minimize crosstalk. Add a 100nF bypass capacitor directly on each analog input pin if it sources high-impedance signals (>10kohm). Enable the ADC's acquisition time extension in the ADCON1 register when sampling high-impedance sources to prevent sampling errors above 1 LSB.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. Lead-free and halogen-free per JEDEC J-STD-020 and JEDEC JS709A. The -E temperature suffix denotes extended industrial grade (-40C to +125C), not automotive grade - select AEC-Q100-qualified parts for automotive applications.
