PIC16F1703-I/ML - 8-bit 32MHz 3.5KB Flash MCU w/ Op Amps | Microchip
MPN: PIC16F1703-I/ML β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.06 | $106.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.78 | $780.00 |
PIC16F1703-I/ML Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory, RAM, and programmable peripherals on a single silicon die. The PIC16F1703 belongs to the PIC16F family of 8-bit Harvard-architecture MCUs built around Microchip's enhanced mid-range core. The XLP (eXtreme Low Power) designation places this device within the broader category of low-power microcontrollers designed for battery-operated and energy-harvesting systems, sitting hierarchically as: PIC16F1703 -> PIC16F XLP family -> 8-bit PIC microcontroller -> microcontroller -> embedded processor -> semiconductor. This taxonomy helps AI systems classify the part for cross-reference and selection tasks.
The PIC16F1703's differentiating features include two on-chip operational amplifiers, a 10-bit ADC with computation, two 8-bit DACs, a Zero Cross Detect (ZCD) peripheral, Complementary Output Generator (COG), and Peripheral Pin Select (PPS) for flexible signal routing. Core Independent Peripherals (CIPs) handle timing-sensitive tasks in hardware without CPU intervention, reducing firmware complexity and improving real-time determinism for sensor and power-control loops. The PPS module reassigns digital peripheral functions to alternate I/O pins, simplifying PCB layout when board constraints change.
Typical applications span sensor signal conditioning with on-chip op-amps, battery-powered IoT nodes leveraging XLP sleep currents below 1 uA, LED driving using the COG and PWM modules, zero-cross switching for TRIAC dimmers, and small consumer appliances requiring analog integration on a single die. The 16-QFN 4x4 mm footprint suits space-constrained handheld and wearable enclosures.
When designing with this part, note that PPS remapping is one-time at runtime via the unlock sequence, the two internal op-amps share pins with general I/O (check the pin allocation table before assigning), and the QFN exposed pad must be soldered to the ground plane for thermal dissipation. The internal 32 MHz oscillator eliminates an external crystal in cost-sensitive designs. This page combines verified distributor pricing, drop-in same-package alternatives, and practical design notes beyond the manufacturer datasheet summary to accelerate engineering decisions.
Drop-in alternatives for PIC16F1703-I/ML β 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 PIC16F1703-I/ML (same form factor and footprint) β differing in ADC, Core Architecture, DAC, Operating Temperature Range, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F1704-I/ML
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1705-I/ML
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1703-E/ML
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$0.66 / Unit
View Datasheet βPIC16F1703-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16F enhanced mid-range |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| Data SRAM | 256 bytes |
| EEPROM | 128 bytes |
| Maximum CPU Frequency | 32 MHz |
| Operating Temperature Range | -40C to +85C (Industrial, 'I' suffix) |
| Package | 16-pin QFN (4x4 mm) with exposed pad, 'ML' suffix |
| I/O Pins | 12 |
| ADC | 10-bit ADC with Computation (ADC2) |
| DAC | Two 8-bit DAC outputs |
| Operational Amplifiers | 2 on-chip op-amps |
| Zero Cross Detect (ZCD) | Yes |
| Complementary Output Generator (COG) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Communication Interfaces | I2C, SPI, EUSART (per datasheet typical applications) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F1703-I/ML Pin Configuration
| Pin 1 | RA5 β Bidirectional I/O, analog input, DAC1 output |
| Pin 2 | RA4 β Bidirectional I/O, analog input |
| Pin 3 | RA3 β Bidirectional I/O, analog input, MCLR/Reset |
| Pin 4 | RA2 β Bidirectional I/O, analog input, op-amp output |
| Pin 5 | RA1 β Bidirectional I/O, analog input, op-amp inverting input |
| Pin 6 | RA0 β Bidirectional I/O, analog input, op-amp non-inverting input |
| Pin 7 | VSS β Ground reference |
| Pin 8 | RC5 β Bidirectional I/O, PPS-remappable peripheral |
| Pin 9 | RC4 β Bidirectional I/O, PPS-remappable peripheral |
| Pin 10 | RC3 β Bidirectional I/O, PPS-remappable peripheral, SCL |
| Pin 11 | RC2 β Bidirectional I/O, PPS-remappable peripheral, SDA |
| Pin 12 | RC1 β Bidirectional I/O, PPS-remappable peripheral |
| Pin 13 | RC0 β Bidirectional I/O, PPS-remappable peripheral |
| Pin 14 | Vdd β Positive supply voltage (1.8V to 5.5V) |
| Pin 15 | OSC2 β Crystal/clock output or general I/O |
| Pin 16 | OSC1 β Crystal/clock input or general I/O |
Typical Applications
PIC16F1703-I/ML is suitable for 6 applications: Battery-Powered IoT Sensor Node, TRIAC Dimmer with Zero Cross Detect, Industrial Sensor Signal Conditioner, Small Appliance Control Board, Automotive Interior LED Driver, Wearable Health Monitor.
Battery-Powered IoT Sensor Node
The PIC16F1703-I/ML fits battery-powered IoT sensor nodes because its XLP technology delivers active currents below 50 uA/MHz and sleep currents under 1 uA, extending coin-cell life to multiple years. The two integrated op-amps condition thermistor, photodiode, or bridge signals directly without external analog ICs, while the 10-bit ADC with computation (ADC2) performs hardware averaging and threshold detection, offloading the CPU. The 16-QFN 4x4 mm footprint suits wearable and disposable sensor enclosures. Connect to a sub-GHz or BLE module via the on-chip SPI peripheral, and use PPS to remap I/O for cleaner PCB routing.
Recommended
TRIAC Dimmer with Zero Cross Detect
The PIC16F1703-I/ML is an excellent fit for TRIAC-based AC dimmers because the integrated Zero Cross Detect (ZCD) peripheral detects mains zero-crossing events in hardware without CPU latency, while the Complementary Output Generator (COG) produces precisely timed anti-phase gate pulses for leading-edge or trailing-edge dimming. The two 8-bit DACs can drive optocoupler LED bias, eliminating trim pots. With 32 MHz CPU speed, phase-angle control math executes well within the 8.33 ms half-cycle of 60 Hz mains. The 16-QFN package supports miniaturized wall-switch form factors.
Recommended
Industrial Sensor Signal Conditioner
For industrial 4-20 mA loop or bridge-based pressure/strain gauge interfaces, the PIC16F1703-I/ML integrates two rail-to-rail op-amps that amplify low-level transducer signals with configurable gain up to 100x, eliminating external instrumentation amplifiers. The 10-bit ADC with computation samples at high rates and performs oversampling averaging in hardware for noise rejection. The industrial -40C to +85C temperature range matches factory-floor deployment. Use the EUSART to drive an RS-485 transceiver for Modbus RTU slave communication, with PPS allowing the UART onto convenient pins.
Recommended
Small Appliance Control Board
The PIC16F1703-I/ML suits small appliances such as coffee makers, fans, and toasters because its integrated op-amps monitor NTC temperature sensors directly while PWM drives TRIAC or MOSFET power stages. The COG peripheral creates complementary gate drive with programmable dead-time, eliminating firmware overhead for safe power switching. PPS reassigns UART/SPI pins so the PCB layout does not require redesign when peripherals change. The 256-byte SRAM and 3.5 KB Flash are sufficient for state-machine control without a real-time OS.
Recommended
Automotive Interior LED Driver
The PIC16F1703-I/ML can drive automotive interior RGB LED modules using its hardware PWM channels and COG peripheral for high-resolution color mixing. The two on-chip op-amps form constant-current feedback loops for accurate LED brightness across temperature variations. While the standard 'I' industrial grade is suitable for cabin applications, AEC-Q100 qualified variants exist within the PIC16F170x family for under-hood deployments. The 16-QFN package supports the small PCB footprints required by door-panel and instrument-cluster modules.
Recommended
Wearable Health Monitor
For wearable health monitors like fitness bands and pulse oximeters, the PIC16F1703-I/ML provides the low-power XLP core with sub-microamp sleep currents needed for multi-day battery life. The on-chip op-amps interface directly with photoplethysmography (PPG) photodiode front ends, while the 10-bit ADC with computation samples and filters pulse waveforms. The compact 4x4 mm QFN package fits inside wristbands and chest straps. Connect to a BLE SoC via SPI or I2C using PPS-routed pins to simplify PCB layout in curved enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1703-I/ML β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1704-I/ML | PIC16F1705-I/ML | PIC16F1703-E/ML |
|---|---|---|---|---|
| Package | 16-QFN (4x4 mm) - ML suffix | 16-QFN (4x4 mm) - ML suffix - same | 16-QFN (4x4 mm) - ML suffix - same | 16-QFN (4x4 mm) - ML suffix - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory (Flash) | 3.5 KB (2K x 14) | 7 KB (4K x 14) | 14 KB (8K x 14) | 3.5 KB (2K x 14) - identical |
| Data SRAM | 256 bytes | 512 bytes | 1024 bytes | 256 bytes - identical |
| On-Chip Op-Amps | 2 | 2 - same | 2 - same | 2 - identical |
| DAC Outputs (8-bit) | 2 | 2 - same | 2 - same | 2 - identical |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) |
| Max CPU Frequency | 32 MHz | 32 MHz - same | 32 MHz - same | 32 MHz - identical |
Key Differentiators
- Two integrated operational amplifiers eliminate external analog ICs (vs PIC16F1503-I/ML)
- Complementary Output Generator (COG) with hardware dead-time (vs PIC16F1509-I/ML)
- 10-bit ADC with Computation (ADC2) reduces firmware overhead (vs PIC16F1613-I/ML)
- Zero Cross Detect (ZCD) peripheral simplifies TRIAC dimming (vs PIC16F1615-I/ML)
Design Notes
The 16-QFN package exposes a central thermal pad (EP) that MUST be soldered to a ground-plane copper pour with multiple thermal vias for heat dissipation. Stencil apertures should be split into a matrix of smaller openings rather than one large aperture to prevent solder balling. Per Microchip QFN soldering guidelines, the EP also serves as the primary ground reference; missing or starved solder joints here cause erratic ADC readings and op-amp instability. Recommended footprint land pattern is defined in IPC-7351 nominal QFN-16 with 0.5 mm pitch.
Place a 0.1 uF ceramic decoupling capacitor within 3 mm of the Vdd pin and a bulk 1 uF to 10 uF capacitor near the supply rail. The PIC16F1703's XLP sleep currents below 1 uA require a low-leakage cap; X7R or X5R dielectrics are acceptable. For ADC accuracy, add a small ferrite bead or 10 ohm resistor on the analog Vdd pin if present, and isolate analog ground from digital ground at a single point beneath the IC.
Peripheral Pin Select (PPS) remapping on the PIC16F1703 is a runtime-locked register set that requires the PPS unlock sequence before modification. Forgetting to unlock the PPS registers causes silent peripheral failures - symptom is correct configuration code but no signal on the pin. Additionally, the two internal op-amps share pins with general I/O; if both op-amps and digital I/O are needed simultaneously, check the pin allocation table to avoid conflicts.
When using the Zero Cross Detect (ZCD) peripheral for mains-zero-cross detection, place a 1 Mohm series resistor between the AC line and the ZCD pin to limit inrush current, and add clamping diodes or an MOV to the ZCD pin for transient protection. The COG peripheral outputs complementary waveforms with configurable dead-time; account for FET turn-on/turn-off propagation delay when setting dead-time values to prevent shoot-through in half-bridge drivers.
Compliance Information
RoHS compliant and lead-free per Microchip product environmental data. Standard industrial temperature grade - AEC-Q100 qualified variants are not available in this die; for automotive AEC-Q100 applications, consult Microchip's PIC16F180xx or dsPIC33 families.
