PIC16LF1705T-I/ST - 8-bit XLP MCU 14KB Flash 14-TSSOP | Microchip
MPN: PIC16LF1705T-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.49 | $14.90 |
| 100 | $1.28 | $128.00 |
| 500 | $1.12 | $560.00 |
| 1,000 | $0.98 | $980.00 |
PIC16LF1705T-I/ST Overview
What is a PIC microcontroller? A PIC (Peripheral Interface Controller) is a family of 8-bit RISC microcontrollers originally developed by General Instrument and later popularized by Microchip Technology. Within the broader microcontroller taxonomy, PIC MCUs sit alongside ARM Cortex-M and AVR as the dominant 8/16/32-bit embedded controller architectures. The PIC16F family occupies the "mid-range" tier of Microchip's lineup, balancing cost, peripheral integration, and code density using a 14-bit instruction word and a 5-stage pipeline. The LF suffix denotes the low-Flash/Fowler-Nordheim process variant optimized for lower VDD operation and the proprietary nanoWatt XLP™ (eXtreme Low Power) sleep modes that can drop quiescent current to the nanoamp range.
Key features of the PIC16LF1705T-I/ST include Core Independent Peripherals (CIPs) such as CLC, PPS (Peripheral Pin Select), the Numerically Controlled Oscillator (NCO), and Complementary Waveform Generator (CWG). These allow complex signal generation and timing without CPU intervention, freeing the core for system-level tasks. The 10-bit ADC with hardware Capacitive Voltage Divider (CVD) provides touch-sensing capability and averaged acquisition modes, while the integrated op-amp and 8-bit DAC simplify analog front-end designs in sensor conditioning loops. The device also includes Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART) and I2C/SPI interfaces for host communication.
Typical applications include IoT sensor nodes, battery-powered consumer electronics, capacitive touch user interfaces, LED lighting controllers, low-end BLDC/PMSM fan control, and small home appliances where the LF process and CIPs reduce BOM cost and firmware complexity. The 32 MHz core delivers roughly 8 MIPS, sufficient for state-machine control loops and simple protocol stacks.
When designing with this part, leverage the PPS module to remap digital peripherals to alternative pins—this simplifies PCB routing when only one or two pins are needed on a particular I/O. For lowest sleep power, configure unused peripherals to OFF, enable the FVR (Fixed Voltage Reference) only when needed, and use the RTC with an external 32.768 kHz crystal to time sleep intervals.
Drop-in alternatives for PIC16LF1705T-I/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 PIC16LF1705T-I/ST (same form factor and footprint) — differing in Operating Temperature, ADC, Package, Program Memory (Flash), I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1705-I/ST
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F1705T-I/ST
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16LF1554T-I/ST
✅ Drop-In✓ In Stock
$0.95 / Unit
View Datasheet →PIC16LF1615T-I/ST
✅ Drop-In✓ In Stock
$0.93 / Unit
View Datasheet →PIC16LF1705T-I/ST Maximum Ratings & Electrical Characteristics
| Architecture | PIC16 8-bit RISC |
| Family | PIC® XLP™ 16F |
| Core Size | 8-bit, 14-bit instruction word |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Program Memory (Flash) | 14 KB (8K x 14) |
| Data SRAM | 1024 bytes |
| EEPROM | 0 bytes (not present on this die) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 14-pin TSSOP |
| Pin/Package Code | ST (TSSOP-14) |
| I/O Pins | 12 |
| ADC | 10-bit, up to 8 channels |
| DAC | 8-bit, 1 channel |
| Comparators | 2 (with 1 op-amp shared) |
| Op-Amps | 1 (configurable) |
| Timers | 4 (8-bit and 16-bit mix) |
| PWM Channels | 2 (10-bit ECCP + CCP) |
| Communication | EUSART, I2C, SPI |
| Core Independent Peripherals | CLC, NCO, CWG, PPS, ZCD |
| Capacitive Touch | Yes (via mTouch CVD) |
| Internal Oscillator | Yes, 32 MHz with PLL |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | 1 |
| Supplied Form | Tape & Reel (T suffix) |
PIC16LF1705T-I/ST Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Pin 2 | RA5/CLKIN/OSC1 — GPIO RA5 / external clock input / crystal oscillator input |
| Pin 3 | RA4/AN3/CWG1IN/CCP1 — GPIO RA4 / ADC channel 3 / CWG input / CCP1 PWM output |
| Pin 4 | RA3/MCLR/VPP — GPIO RA3 / Master Clear reset (active-low) / programming voltage |
| Pin 5 | RC5/PWM3/CLCIN3 — GPIO RC5 / PWM3 output / CLC input |
| Pin 6 | RC4/AN8/CWG1B/SDI/SDA — GPIO RC4 / ADC channel 8 / CWG output B / SPI SDI / I2C SDA |
| Pin 7 | RC3/AN7/CWG1A/SCK/SCL — GPIO RC3 / ADC channel 7 / CWG output A / SPI SCK / I2C SCL |
| Pin 8 | RC2/AN6/DAC1OUT1/CMP2/PWM2 — GPIO RC2 / ADC channel 6 / DAC1 output / comparator 2 output / PWM2 |
| Pin 9 | RC1/AN5/CMP1OUT/C1IN1-/ZCD — GPIO RC1 / ADC channel 5 / comparator 1 output / comparator input / zero-cross detect |
| Pin 10 | RC0/AN4/C1IN+/OPA1IN+ — GPIO RC0 / ADC channel 4 / comparator non-inverting input / op-amp non-inverting input |
| Pin 11 | RA2/AN2/C1OUT/T0CKI/PWM1 — GPIO RA2 / ADC channel 2 / comparator 1 output / Timer0 clock / PWM1 |
| Pin 12 | RA1/AN1/ICSPCLK/ICDCLK — GPIO RA1 / ADC channel 1 / ICSP clock / ICD clock |
| Pin 13 | RA0/AN0/ICSPDAT/ICDDAT — GPIO RA0 / ADC channel 0 / ICSP data / ICD data |
| Pin 14 | VSS — Ground reference |
Typical Applications
PIC16LF1705T-I/ST is suitable for 7 applications: Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, LED Lighting Controller, Small Home Appliance Control, BLDC / PMSM Fan Driver MCU, Industrial Sensor Transmitter, Consumer Wearable Device.
Battery-Powered IoT Sensor Node
The PIC16LF1705T-I/ST suits coin-cell and 2xAA battery IoT nodes because its 1.8-3.6V VDD range pairs with nanoWatt XLP sleep modes that drop quiescent current below 50 nA in deep sleep with RTC running. Its 14 KB Flash hosts a small sensor-stack firmware and 1024 bytes SRAM is sufficient for queued measurement frames. The integrated 10-bit ADC with hardware CVD allows direct connection to resistive sensors or capacitive touch electrodes without external analog front-end.
Recommended
Capacitive Touch User Interface
Microchip's mTouch library paired with the PIC16LF1705T-I/ST's 10-bit ADC and CVD peripheral enables scan-based capacitive touch sensing on glass, plastic, or PCB substrates without dedicated touch ICs. The op-amp and 8-bit DAC allow sensor self-calibration and active-shield drive for moisture-tolerant designs. With CLC and PPS, button events can be hardware-interlocked for debouncing before CPU wake-up, preserving sleep current budget.
Recommended
LED Lighting Controller
The PIC16LF1705T-I/ST drives low-to-medium power LED strings via its 10-bit Enhanced CCP and complementary waveform generator (CWG), supporting PWM dimming, color-mixing, and fault detection in a single chip. The 32 MHz core and 8 MIPS throughput handle DMX-style or I2C-controlled dimming protocols. Its low-voltage process makes it compatible with 3.3V-only LED driver ecosystems such as constant-current regulator strings.
Recommended
Small Home Appliance Control
Coffee makers, blenders, humidifiers, and small kitchen appliances benefit from the PIC16LF1705T-I/ST's integrated op-amp, comparator, and zero-cross detect to sense line-derived AC signals for TRIAC firing or motor tachometer feedback. With 12 I/O pins and PPS, designers can route AC zero-cross to hardware interrupt and timer capture for software-free timing. The TSSOP-14 package simplifies low-cost single-sided PCB layouts.
Recommended
BLDC / PMSM Fan Driver MCU
Low-voltage brushless DC and PMSM fans use the PIC16LF1705T-I/ST for commutation loop control via the CWG and timer hardware, with the on-chip op-amp conditioning back-EMF sense signals. The 10-bit ADC with hardware averaging reduces CPU load for current sensing, and PPS allows flexible PCB routing of phase-sense and gate-drive signals. nanoWatt XLP sleep helps standby power compliance for energy-star appliances.
Recommended
Industrial Sensor Transmitter
Loop-powered 4-20 mA sensor transmitters and Modbus RTU remote sensors fit the PIC16LF1705T-I/ST due to its industrial -40C to +85C rating and 1.8-3.6V operation. The EUSART supports RS-485 Modbus slave stacks while the 8-bit DAC generates analog loop currents. CIPs like CLC and NCO implement Manchester encoding for proprietary protocols or PWM-to-frequency conversion without CPU overhead.
Recommended
Consumer Wearable Device
Fitness bands, smart watches, and wearable medical accessories leverage the PIC16LF1705T-I/ST's ultra-low sleep current to extend coin-cell runtime while hosting BLE-beacon or NFC-poll firmware stacks. The 14 KB Flash accommodates small wireless-stack implementations and 1024 bytes SRAM handles data buffering between radio events. PPS allows remapping of I2C and SPI for sensor hub integration.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1705T-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1705-I/ST | PIC16F1705T-I/ST | PIC16LF1554T-I/ST | PIC16LF1615T-I/ST |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TSSOP-14 | TSSOP-14 - same | TSSOP-14 - same | TSSOP-14 - same | TSSOP-14 - same |
| Flash Memory | 14 KB | 14 KB | 14 KB | 7 KB (-50%) | 14 KB |
| SRAM | 1024 B | 1024 B | 1024 B | 512 B (-50%) | 1024 B |
| VDD Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V (wider) | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum CPU Speed | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS | 32 MHz / 8 MIPS |
| ADC | 10-bit, 8-ch | 10-bit, 8-ch | 10-bit, 8-ch | 10-bit, 8-ch | 10-bit, 8-ch |
| DAC | 8-bit, 1-ch | 8-bit, 1-ch | 8-bit, 1-ch | None (not present) | None (not present) |
| Op-Amp | Yes (1) | Yes (1) | Yes (1) | No | No |
| CLC / NCO / CWG | Yes | Yes | Yes | No | CLC only |
Key Differentiators
- Integrated 8-bit DAC and op-amp on TSSOP-14 (vs PIC16LF1554T-I/ST)
- Wider VDD range vs LF variant (vs PIC16LF1705T-I/ST)
- Full Core Independent Peripherals suite (vs PIC16LF1615T-I/ST)
Design Notes
For lowest sleep current on the PIC16LF1705T-I/ST, switch off all unused peripherals via PMD (Peripheral Module Disable) registers and disable the FVR except during ADC conversion. Enable the nanoWatt XLP modes (Sleep/Idle/Doze) and use the RTC with an external 32.768 kHz crystal to schedule wake-ups. Estimating from typical Microchip nanoWatt specs, a Sleep+RTCC configuration draws well under 1 uA, supporting multi-year coin-cell runtime in sensor-edge applications.
Keep VDD/VSS decoupling within 5 mm of the MCU pins using a 100 nF ceramic capacitor; for switching loads on the same supply rail, add a 10 uF bulk capacitor. Place the ICSP programming header (PGD/PGC on RA0/RA1) at the board edge or test points for field re-programmability, leaving RA3/MCLR accessible with a 10 kohm pull-up to VDD to avoid programming issues during in-system debugging.
Use PPS to remap high-speed peripherals (SPI, EUSART) away from analog-capable pins to reduce digital switching noise coupling into ADC measurements. Group analog inputs on the same physical pin cluster (e.g. ANx on RC0-RC3) and digital I/O on RA0-RA5. Use the on-chip op-amp as a buffer between high-impedance sensors and the ADC to maintain signal integrity at low VDD.
Do not assume any pin is 5 V tolerant; the LF process VDD maximum is 3.6 V and applying >3.6 V to any I/O may damage the device. The TSSOP-14 package does not include a dedicated AVSS/AVDD pair; ensure analog ground is star-connected to the same VSS plane as digital ground. When migrating PIC16LF1705T-I/ST firmware to the PIC16F1705T-I/ST, note the wider VDD range permits 5V operation but the LF sleep current spec does not apply.
Compliance Information
RoHS and REACH compliance per Microchip product environmental compliance documentation. Not AEC-Q100 qualified; choose automotive-grade PIC16F variants for vehicle applications. Industrial temperature grade -40C to +85C per Microchip datasheet.
