PIC16F1703T-I/ML - 8-bit MCU, 3.5KB Flash, 16-pin QFN | Microchip
MPN: PIC16F1703T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.25 | $12.50 |
| 100 | $1.06 | $106.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.81 | $810.00 |
| 3,300 | $0.72 | $2,376.00 |
PIC16F1703T-I/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and peripherals into one device. The PIC16F1703 belongs to the PIC16F1xxx family of 8-bit Harvard-architecture MCUs, which sit within the broader category of microcontrollers -> embedded processors -> semiconductors. These devices target general-purpose applications where low cost, low power, and integrated analog peripherals replace discrete op-amps, comparators, and DACs.
Key features include on-chip op amps, Core Independent Peripherals (Configurable Logic Cells/COG and Zero Cross Detect/ZCD), Peripheral Pin Select (PPS) for flexible signal routing, a 10-bit ADC, 8-bit DAC, two PWM modules, and EUSART, I2C and SPI interfaces. The XLP variant supports nanoWatt sleep currents below 50 nA typical, making the part suitable for battery-powered IoT and remote sensor nodes.
Architecturally, the PIC16F1703 uses a modified Harvard core with a 14-bit instruction word, a hardware multiplier, and an interrupt controller with vectored priorities. The PPS feature allows peripheral functions to be remapped to multiple I/O pins at runtime, simplifying PCB layout when signal paths must change. The 16-pin QFN package supports industrial-grade -40C to +85C operation.
Typical applications include consumer appliance control, low-power sensor conditioning, LED lighting drivers, and small motor control loops where the integrated op amps and zero-cross detect remove the need for external analog components. The wide operating voltage range also enables direct connection to single-cell Li-ion or 2x AA battery stacks without an additional regulator.
When designing with this MCU, allocate sufficient Flash and stack space for the C library runtime if using the XC8 compiler. Plan the PPS mapping early because some peripherals can be remapped only to specific pins on the 16-pin QFN variant.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, providing selection context that complements Microchip's official documentation.
Drop-in alternatives for PIC16F1703T-I/ML — 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 PIC16F1703T-I/ML (same form factor and footprint) — differing in ADC, Core Architecture, I/O Pins, PWM Modules, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1703-I/ML
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →PIC16F1703-I/ST
✅ Drop-In✓ In Stock
$0.84 / Unit
View Datasheet →PIC16F1707-I/ML
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →PIC16F1615-I/ML
✅ Drop-In✓ In Stock
$0.84 / Unit
View Datasheet →PIC16F1509T-I/ML
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F1703T-I/ML Maximum Ratings & Electrical Characteristics
| Program Memory Type | Flash |
| Program Memory Size | 3.5 KB (2K x 14) |
| Data RAM | 256 B |
| Core | PIC 8-bit |
| Core Architecture | Harvard, 14-bit instruction word |
| Maximum CPU Speed | 32 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| ADC | 10-bit |
| DAC | 8-bit |
| On-chip Op Amps | Yes (2) |
| Core Independent Peripherals | COG (Configurable Logic Cell), ZCD (Zero Cross Detect) |
| Peripheral Pin Select (PPS) | Yes |
| Communication Interfaces | EUSART, I2C, SPI |
| PWM Modules | 2 |
| Operating Temperature Range | -40 C to +85 C (Industrial, "I") |
| Package Type | 16-pin QFN (4x4 mm) with exposed pad |
| Package Designator | ML |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F1703T-I/ML Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O / GPIO with PPS remap |
| Pin 2 | RA4 — Bidirectional I/O / GPIO |
| Pin 3 | RA3 — Bidirectional I/O / MCLR/Reset input |
| Pin 4 | RA2 — Bidirectional I/O / analog input |
| Pin 5 | RA1 — Bidirectional I/O / ICSPCLK |
| Pin 6 | RA0 — Bidirectional I/O / ICSPDAT |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7 — Bidirectional I/O / GPIO |
| Pin 9 | RA6 — Bidirectional I/O / GPIO |
| Pin 10 | RC0 — Bidirectional I/O / analog input |
| Pin 11 | RC1 — Bidirectional I/O / analog input |
| Pin 12 | RC2 — Bidirectional I/O / analog input |
| Pin 13 | RC3 — Bidirectional I/O / analog input |
| Pin 14 | RC4 — Bidirectional I/O / GPIO |
| Pin 15 | RC5 — Bidirectional I/O / GPIO |
| Pin 16 | VDD — Positive supply voltage |
Typical Applications
PIC16F1703T-I/ML is suitable for 6 applications: AC Mains Phase-Angle Dimmer Control, Battery-Powered IoT Sensor Node, Consumer Appliance Control Board, Industrial Sensor Transmitter, Small BLDC / Fan Motor Driver, Hobby Robotics and Educational Board.
AC Mains Phase-Angle Dimmer Control
The PIC16F1703T-I/ML is ideal for AC mains phase-angle dimmer control thanks to its integrated Zero Cross Detect (ZCD) peripheral and on-chip op amps. ZCD detects mains zero crossings with sub-100us latency, enabling a microcontroller-free triac firing delay loop, while the two rail-to-rail op amps condition current-sense signals for closed-loop feedback. With XLP nanoWatt sleep current below 50 nA, the part suits wall-switch and smart-lighting products that spend most of their time idle. PPS lets the same hardware route ZCD to any I/O pin, simplifying PCB layout.
Recommended
Battery-Powered IoT Sensor Node
The PIC16F1703T-I/ML targets battery-powered IoT sensor nodes because of its eXtreme Low Power (XLP) technology and 1.8V minimum supply voltage. Sleep current below 50 nA typical enables multi-year operation from a single CR2032 coin cell when the MCU wakes only to read sensors. The integrated 10-bit ADC and on-chip op amps condition analog sensors (thermistors, photodiodes, load cells) without external amplifier ICs, while EUSART, I2C, and SPI connect to radio modules or digital sensors. PPS allows flexible PCB routing on the compact QFN-16 footprint.
Recommended
Consumer Appliance Control Board
The PIC16F1703T-I/ML fits consumer appliance control boards (washing machines, dishwashers, coffee machines) where integrated analog and Core Independent Peripherals replace discrete components. Configurable Logic Cells (COG) run safety interlocks without CPU intervention, freeing the core for HMI and motor control. The 32 MHz CPU rate delivers 8 MIPS for state-machine timing, while the 3.5 KB Flash accommodates small protocol stacks. The 16-pin QFN (4x4 mm) drops into space-constrained appliance boards where a TSSOP-20 would not fit.
Recommended
Industrial Sensor Transmitter
The PIC16F1703T-I/ML serves industrial 4-20 mA loop-powered sensor transmitters because its 1.8V minimum supply lets it run from a regulated loop rail while its op amps condition bridge, RTD, or thermocouple inputs. The 10-bit ADC with internal FVR delivers <1% full-scale accuracy across the industrial -40C to +85C range. PPS maps EUSART to any pin for HART or RS-485 modems, and ZCD detects AC line frequency for synchronous noise rejection. The 16-pin QFN provides a small footprint for in-head transmitter housings.
Recommended
Small BLDC / Fan Motor Driver
The PIC16F1703T-I/ML controls small BLDC or fan motors up to a few watts by combining PWM outputs with on-chip op amps for back-EMF sensing. The COG peripheral implements commutation logic without CPU intervention, reducing firmware complexity and jitter for low-rpm applications. PPS remaps PWM to complementary output pairs on the QFN-16 footprint, simplifying 3-phase driver PCB layout. At 32 MHz the deterministic interrupt response maintains commutation timing within microseconds.
Recommended
Hobby Robotics and Educational Board
The PIC16F1703T-I/ML is well suited for hobby robotics and educational microcontroller boards because of its low cost, QFN-16 4x4 mm footprint, and integrated analog peripherals that let students experiment without external op amps. The 3.5 KB Flash holds simple robotics control code while PPS enables flexible pin mapping during classroom prototyping. XLP technology teaches real-world power optimization, and the 1.8V minimum supply supports battery-powered robot kits using 2x AA cells directly.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1703T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1703-I/ML | PIC16F1703-I/ST | PIC16F1707-I/ML | PIC16F1615-I/ML | PIC16F1509T-I/ML |
|---|---|---|---|---|---|---|
| Package | QFN-16 (4x4 mm) | QFN-16 (4x4 mm) - same | TSSOP-14 - different footprint | QFN-16 (4x4 mm) - same | QFN-16 (4x4 mm) - same | QFN-20 (5x5 mm) - larger |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 3.5 KB | 3.5 KB | 3.5 KB | 7 KB | 7 KB | 8 KB |
| Data RAM | 256 B | 256 B | 256 B | 512 B | 512 B | 512 B |
| On-chip Op Amps | Yes (2) | Yes (2) | Yes (2) | Yes (2) | No | No |
| Zero Cross Detect (ZCD) | Yes | Yes | Yes | Yes | No | No |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Approx. Unit Price (qty 1000) | $0.81 USD | $0.81 USD (tube) | $0.85 USD | $0.92 USD | $0.78 USD | $0.95 USD |
Key Differentiators
- Integrated Zero Cross Detect (ZCD) eliminates external triac-driver zero-crossing circuits (vs PIC16F1615-I/ML)
- Two on-chip rail-to-rail op amps remove external analog conditioning ICs (vs PIC16F1509T-I/ML)
- Core Independent Peripherals (COG) execute safety interlocks without CPU intervention (vs PIC16F1455-I/SL)
- Peripheral Pin Select (PPS) provides I/O routing flexibility on a small QFN-16 footprint (vs PIC16F1503-I/ST)
Design Notes
Power-supply decoupling on the PIC16F1703T-I/ML follows the standard PIC MCU recommendation: place a 100 nF ceramic capacitor as close as possible to the VDD pin (pin 16) and a bulk capacitor (typically 10 uF) at the supply rail entry point. For noise-sensitive analog applications using the 10-bit ADC, add a 10 nF ceramic in parallel with the 100 nF to filter high-frequency switching noise. The exposed thermal pad (EP) of the QFN-16 package must be soldered to a copper pour connected to VSS for thermal and electrical reference.
Estimated: at 32 MHz operation from 5 V supply and all peripherals active, the PIC16F1703T-I/ML dissipates roughly 15 mW. With the QFN-16 package thermal resistance theta_JA around 50 C/W (typical 4-layer JEDEC test board), this yields a junction temperature rise of less than 1 C above ambient - well below the 125 C maximum. Industrial -40C to +85C ambient operation is achievable without special thermal management beyond normal PCB copper pouring.
The PIC16F1703T-I/ML's 16-pin QFN (4x4 mm) requires careful PCB layout: route all I/O signals on the top layer or via-in-pad if escaping is needed, and provide a continuous VSS copper pour under the exposed pad for thermal dissipation. The PPS feature allows peripheral functions to be reassigned to alternative I/O pins, so PCB layout can be optimized before firmware finalization. Keep the ICSP programming traces (ICSPDAT on RA0, ICSPCLK on RA1) short and isolated from switching power traces to prevent in-circuit programming errors.
Do not exceed 5.5 V on VDD - the PIC16F1703T-I/ML is rated for 1.8-5.5 V only. Leave the MCLR/RA3 pin configured as MCLR (reset) only if external reset is required; otherwise configure as digital input to free up an I/O. The PPS feature maps peripherals to specific pin groups, so verify the desired pin-peripheral mapping is supported before committing to PCB layout. Flash self-write operations stall the CPU during erase - design interrupt handlers to tolerate this latency in time-critical applications.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - select PIC16F1703-E/ML extended-temperature or AEC-Q100 variants for automotive applications.
