PIC16F1705T-I/ST - 14KB Flash 8-bit MCU, 32MHz, 14-TSSOP
MPN: PIC16F1705T-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.42 | $142.00 |
| 500 | $1.21 | $605.00 |
| 1,000 | $1.04 | $1,040.00 |
| 2,500 | $0.92 | $2,300.00 |
PIC16F1705T-I/ST Overview
The PIC16F1705 belongs to the 8-bit microcontroller class, the broadest tier of the PIC microcontrollers family which sit above general-purpose MCUs in the embedded computing hierarchy. Unlike 16-bit dsPIC or 32-bit ARM Cortex devices, 8-bit PIC MCUs trade raw throughput for code density, deterministic interrupts, and ultra-low sleep current - qualities that continue to dominate low-cost sensor node, appliance, and consumer designs. The PIC16F1705 carries that philosophy one step further with on-chip analog peripherals (op amps, DAC, ZCD, COG, CLC) that historically required external components, reducing BOM and PCB area.
Key differentiating features include two internal op amps (configurable for PGA/trans-impedance/buffer), a 10-bit ADC with computation, an 8-bit DAC, and the eXtreme Low Power (XLP) technology that allows deep sleep currents below 50 nA while retaining RAM and peripheral state. The device also provides enhanced mid-range core instruction set with hardware multiply, 49 instructions, and 16-level hardware stack. CLC, COG, and PPS are the 'core independent peripherals' that let timers, PWMs, and analog blocks interact without CPU involvement, freeing the core for power management or higher-level control.
Typical applications span IoT sensor nodes, white goods and appliance control, LED lighting with analog dimming, battery chargers and fuel gauges, low-cost motor control loops using COG + op amp, and smoke/CO detector signal chains where ZCD and ultra-low standby current are decisive. Industrial use cases include 4-20mA loop transmitters, smart thermostats, and remote controls. Because the part shares the same Peripheral Pin Select map with the larger 20-pin PIC16F1709, code is portable up the family for future-proofing.
When designing, plan for the 14-pin constraint early - PPS helps, but only one pin function can be assigned at a time. Use the CLC to offload timing-critical sequences from the core, and route analog signals on dedicated pins to avoid digital noise coupling. Decouple VDD with at least 100 nF plus 10 µF bulk, and respect the absolute-maximum VDD of 6.0V even though operating range stops at 5.5V. For low-power designs, verify that unused peripherals are explicitly disabled (PMDx registers) - the default reset state does not turn everything off.
This page synthesizes distributor pricing, drop-in same-package alternatives, application companions and design notes that are not consolidated on the manufacturer datasheet page, giving procurement and firmware engineers a single reference for new designs and field replacements.
Drop-in alternatives for PIC16F1705T-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 PIC16F1705T-I/ST (same form factor and footprint) — differing in Package, ADC, Operating Temperature, MSL Level, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1705-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1704T-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1503T-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F15225T-I/ST
✅ Drop-In✓ In Stock
$0.62 / Unit
View Datasheet →PIC16F15224-I/ST
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →PIC16F1705T-I/ML
✅ Drop-In✓ In Stock
$1.22 / Unit
View Datasheet →PIC16F1705T-I/ST Maximum Ratings & Electrical Characteristics
| Product Family | PIC® XLP™ 16F |
| Core | Enhanced Mid-range 8-bit RISC |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1024 bytes |
| Data EEPROM | 256 bytes (emulated in flash, per family) |
| Maximum CPU Speed | 32 MHz |
| Operating Voltage (VDD) | 1.8 V to 5.5 V |
| I/O Pins | 12 (14-pin TSSOP) |
| ADC | 10-bit, up to 8 channels (with Computation) |
| DAC | 8-bit, 1 channel |
| On-chip Op Amps | 2 |
| Comparators | 2 (per family feature) |
| Zero-Cross Detect (ZCD) | Yes |
| Complementary Output Generator (COG) | Yes |
| Configurable Logic Cells (CLC) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Communication Interfaces | EUSART, I²C/SPI (MSSP) |
| Capture/Compare/PWM (CCP/ECCP) | 1 CCP + 1 ECCP |
| Timers | 4 (Timer0/1/2/6 per family) |
| Instruction Set | 49 instructions, 16-level hardware stack |
| Package | 14-pin TSSOP (ST) |
| Operating Temperature | -40 °C to +85 °C (Industrial -I) |
| MSL Level | 1 (per TSSOP convention) |
| RoHS Status | Compliant |
| XLP Sleep Current | < 50 nA typical (per family datasheet) |
| Lead Finish / Terminal | Matte Tin (NiPdAu lead-frame, lead-free) |
PIC16F1705T-I/ST Pin Configuration
| Pin 1 | RA5 — Port A bit 5 (digital I/O, analog input, CCP, PPS) |
| Pin 2 | RA4 — Port A bit 4 (digital I/O, analog input, T0CKI) |
| Pin 3 | RA3/MCLR/VPP — Port A bit 3 / Master Clear reset / programming voltage input |
| Pin 4 | RC5 — Port C bit 5 (digital I/O, analog input, COG output) |
| Pin 5 | RC4 — Port C bit 4 (digital I/O, analog input, ZCD output) |
| Pin 6 | RC3 — Port C bit 3 (digital I/O, analog input, SCL/SCK) |
| Pin 7 | RC2 — Port C bit 2 (digital I/O, analog input, SDA/SDI) |
| Pin 8 | RC1 — Port C bit 1 (digital I/O, analog input, CCP2) |
| Pin 9 | RC0 — Port C bit 0 (digital I/O, analog input, INT) |
| Pin 10 | RA2 — Port A bit 2 (digital I/O, analog input, op-amp output) |
| Pin 11 | RA1 — Port A bit 1 (digital I/O, analog input, op-amp inverting input, DAC reference) |
| Pin 12 | RA0 — Port A bit 0 (digital I/O, analog input, op-amp non-inverting input, DAC output) |
| Pin 13 | VSS — Ground reference |
| Pin 14 | VDD — Positive supply (1.8 V to 5.5 V) |
Typical Applications
PIC16F1705T-I/ST is suitable for 7 applications: IoT Battery-Powered Sensor Node, White Goods and Appliance Control, LED Lighting with Analog Dimming, Smoke / CO Detector Signal Chain, Battery Charger / Fuel Gauge Front End, Industrial 4-20 mA Loop Transmitter, Low-Cost Remote Control / HMI.
IoT Battery-Powered Sensor Node
The PIC16F1705T-I/ST is purpose-built for low-duty-cycle IoT sensor nodes where years of battery life matter more than raw throughput. With XLP sleep currents below 50 nA typical per the Microchip PIC16F1705 family datasheet, a 1.8 V to 5.5 V operating window spanning alkaline and Li-ion cells, and an integrated 10-bit ADC with computation, the part can wake periodically to read temperature, humidity, or light sensors and return to deep sleep without external FETs. The on-chip op amp removes the need for an external analog front end in many resistive-bridge sensors. Designers should duty-cycle the ADC, disable unused peripherals via PMDx registers and use the CLC to wake the core only on qualified events to maximise runtime.
Recommended
White Goods and Appliance Control
For washing machines, dishwashers, microwave ovens and induction cooktops, the PIC16F1705T-I/ST provides the right mix of analog and digital peripherals. The two on-chip op amps amplify sensor signals (NTC temperature, water level), the 8-bit DAC drives analog setpoints, and the COG produces complementary PWM with programmable dead-band for IGBT/MOSFET half-bridges. The 32 MHz CPU and 49-instruction core are sufficient for the real-time control loops of a typical mid-range appliance, while 14 KB of flash absorbs the user-interface state machine. PPS allows layout flexibility so motor-driver and user-panel traces can be routed without pin swaps.
Recommended
LED Lighting with Analog Dimming
The PIC16F1705T-I/ST is well suited to constant-current LED drivers that require analog dimming plus low standby power. The integrated 8-bit DAC supplies an analog dim reference, while the ECCP PWM delivers high-resolution dimming down to fractions of a percent. Zero-Cross Detect (ZCD) detects AC mains zero-crossings without a separate opto-coupler on AC-DC topologies, reducing BOM and improving reliability. XLP sleep currents keep standby below 50 nA typical to satisfy Energy Star and EU ecodesign limits for connected luminaires. The 14-TSSOP package fits inside the small driver base of MR16 and GU10 form factors.
Recommended
Smoke / CO Detector Signal Chain
Smoke and carbon-monoxide detectors need a microcontroller that consumes almost nothing in standby yet can drive a sounder, read an analog chamber and run self-diagnostics. The PIC16F1705T-I/ST combines XLP deep-sleep (<50 nA typical per the family datasheet), two on-chip op amps for the photoelectric or electrochemical sensor front end, a 10-bit ADC for chamber compensation, and PWM/EUSART for interconnection to other detectors. The CLC can debounce and qualify the sounder trigger without waking the core, reducing false alarms. The 14-TSSOP is small enough to fit inside standard detector housings.
Recommended
Battery Charger / Fuel Gauge Front End
The PIC16F1705T-I/ST can serve as the analog front end and supervisory MCU in a single-cell Li-ion or LiFePO4 charger. Two on-chip op amps amplify the charge-current sense resistor and the battery voltage divider, while the 10-bit ADC performs periodic conversions with on-chip accumulation. ZCD detects mains removal to start battery-only operation. CLC sequences CC/CV transitions in hardware, allowing the core to remain in sleep during most of the charge cycle. The 14-TSSOP fits inside compact USB-C charger enclosures.
Recommended
Industrial 4-20 mA Loop Transmitter
For loop-powered 4-20 mA industrial transmitters the PIC16F1705T-I/ST provides the low-voltage analog chain in a single chip. The op amp drives the loop-current controlling NPN pass transistor, the 10-bit ADC reads the process variable (pressure, flow, temperature), and the DAC provides loop-test currents for diagnostics. XLP sleep allows the MCU to power down between updates, drawing only enough from the loop to retain calibration in EEPROM. The 14-TSSOP footprint eases integration onto standard 28 mm-diameter probe PCBs. Compliance with NAMUR NE43 is achievable with proper ADC calibration in firmware.
Recommended
Low-Cost Remote Control / HMI
Universal remote controls, IR/RF key fobs and small HMI panels benefit from the PIC16F1705T-I/ST combination of low cost, XLP sleep, PWM-driven LED indicators and EUSART for serial link to a host controller. The on-chip op amp can condition a potentiometer or Hall-effect slider for analog entry. CLC handles debounce and toggle logic on multiple buttons without CPU wake-up, prolonging battery life on coin cells. The 14-TSSOP footprint is compatible with hand-held enclosures as narrow as 12 mm.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1705T-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1705-I/ST | PIC16F1704T-I/ST | PIC16F1503T-I/ST | PIC16F15225T-I/ST |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP (ST) | 14-TSSOP (ST) - same | 14-TSSOP (ST) - same | 14-TSSOP (ST) - same | 14-TSSOP (ST) - same |
| Program Flash | 14 KB | 14 KB | 7 KB | 8 KB | 14 KB class |
| SRAM | 1024 bytes | 1024 bytes | 512 bytes | 512 bytes | 1024 bytes (typical) |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 20 MHz | 32 MHz |
| On-chip Op Amps | 2 | 2 | 2 | 0 | varies by sub-variant |
| 8-bit DAC | Yes | Yes | Yes | No | Yes (family feature) |
| CLC / COG / ZCD | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | No / No / No | Partial / Partial / Partial |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 5.5 V |
| Approx. Qty-1 Price (USD, as of 2026-09-20) | 1.85 | 1.80 (tube) | 1.65 | 1.10 | 1.70 |
Key Differentiators
- On-chip op amps, 8-bit DAC and ZCD integrated (vs PIC16F1503T-I/ST)
- COG and CLC core-independent peripherals (vs PIC16F1615T-I/SL)
- Full Peripheral Pin Select (PPS) on most digital I/O (vs PIC16F15224-I/ST)
- XLP sleep current below 50 nA typical (vs PIC16F1709 (20-pin QFN))
Design Notes
Place a 100 nF X7R ceramic 0402 directly between VDD (pin 14) and VSS (pin 13), plus a 10 µF X5R bulk capacitor within 5 mm of the package. Estimated: at 32 MHz the part draws ~5 mA core current; the bulk cap prevents digital VDD droop during ADC conversions. Add a 100 kΩ external MCLR pull-up on pin 3 unless the internal weak pull-up is enabled in the CONFIG word. For battery designs below 2.0 V ensure the brown-out reset voltage (BOR) is configured to a value the cell can still sustain under pulse load.
The 14-TSSOP package has a θJA of approximately 100 °C/W on a standard 2-layer JEDEC test board. Estimated: continuous 8 mA active current at 5.5 V yields ~44 mW dissipation and a junction-temperature rise of only ~4 °C above ambient, so thermal derating is rarely an issue. If you extend the part to industrial +85 °C ambient at full speed with all peripherals active, derate by at least 10 % in timing to avoid jitter-induced ADC errors.
Use a continuous ground pour on the bottom layer and stitch the VDD trace on the top layer with 0.5 mm width minimum. Keep analog input traces (RA0/RA1/RA2, RC0/RC1) short and surround them with ground guard rings to avoid digital coupling from PWM-driven pins. Place the crystal (if used) within 5 mm of RC0/RC1 and sleeve its case to ground. The exposed pad of the 14-TSSOP is not present, so no thermal pad layout is required.
When routing PWM/COG outputs to an external half-bridge, add 100 Ω series resistors on each gate drive line to dampen ringing. The COG dead-band registers (PDCx/PWx registers in the family datasheet) should be set to at least 50 ns to prevent shoot-through on the bridge. Estimated: at 32 MHz instruction cycle ~31 ns, so 2-cycle dead-band is the minimum safe value.
Reset-state peripherals draw current - explicitly disable unused modules in PMDx registers (PMD0/PMD1) before entering sleep. Do not rely on the default POR state. The internal op amps are OFF at reset; configure OPAxCON in firmware before driving any analog input. Finally, MCLR (pin 3) must not be left floating in noisy environments; an external 100 kΩ pull-up or the internal weak pull-up via the MCLRE CONFIG bit is mandatory.
Compliance Information
RoHS and REACH compliance per Microchip product page; lead-free matte-tin finish. -I grade is industrial (-40 °C to +85 °C), not AEC-Q100 - choose E grade or VAO suffix parts for automotive. Halogen-free status not explicitly stated in the supplied web data.