PIC16F1703-E/ML - 8-bit MCU, 3.5KB Flash, 32MHz, 16-QFN | Microchip
MPN: PIC16F1703-E/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.94 | $0.94 |
| 10 | $0.87 | $8.70 |
| 100 | $0.79 | $79.00 |
| 500 | $0.72 | $360.00 |
| 1,000 | $0.66 | $660.00 |
PIC16F1703-E/ML Overview
What is an 8-bit microcontroller? An 8-bit MCU is a single-chip computer that processes data in 8-bit wide chunks and integrates CPU, RAM, non-volatile program memory, and peripherals on one die. The PIC16F1703 belongs to the hypernym hierarchy: microcontroller -> 8-bit MCU -> PIC16F family -> PIC16F1703 sub-family. XLP technology targets battery-powered and energy-harvesting designs by minimizing active and sleep current consumption, while the on-chip op amps and Core Independent Peripherals (CIPs) like the Complementary Output Generator (COG) and Zero Cross Detect (ZCD) enable mixed-signal functions without CPU intervention.
Key features include a 10-bit ADC with up to 12 channels, two on-chip operational amplifiers, a configurable Complementary Output Generator (COG), Zero Cross Detect (ZCD), Peripheral Pin Select (PPS) for flexible signal routing, and a wide operating voltage range from 1.8 V to 5.5 V. The device also integrates a 5-bit DAC, 8-bit/16-bit timers, enhanced PWM, EUSART, I2C, and SPI peripherals.
Architecturally, the PIC16F1703 uses a RISC-style Harvard architecture with a 14-bit instruction word. Internal signal routing through PPS allows designers to remap digital peripherals to different I/O pins, simplifying PCB layout and enabling design reuse across board variants.
Typical applications include LED lighting controllers with dimming, smart sensor nodes, small motor and fan controls, battery-powered IoT end nodes, and general-purpose analog front-end conditioning where on-chip op amps reduce BOM cost.
When designing with this part, ensure the exposed pad on the QFN package is soldered to a sufficient copper pour for thermal dissipation. Decouple VDD with a 100 nF ceramic capacitor placed within 3 mm of the pin, and route PPS signals away from analog traces to minimize crosstalk.
This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes compiled from the manufacturer datasheet and cross-reference databases, offering information not present on the standalone datasheet.
Drop-in alternatives for PIC16F1703-E/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 PIC16F1703-E/ML (same form factor and footprint) — differing in Core Architecture, Package, Comparators, DAC, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1703-I/ML
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →PIC16F1825-I/ML
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16F1829-I/ML
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F1614-E/ML
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F15356-I/ML
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F1703-E/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC Enhanced Mid-Range |
| Program Memory (Flash) | 3.5 KB (2K x 14) |
| Data SRAM | 256 bytes |
| Maximum CPU Frequency | 32 MHz |
| Operating Voltage Range | 1.8 V to 5.5 V |
| ADC | 10-bit, up to 12 channels |
| On-chip Op Amps | 2 |
| DAC | 5-bit, 1 channel |
| Comparators | 2 (with selectable reference) |
| Timers | 8-bit and 16-bit |
| PWM Modules | Enhanced PWM (ECCP) |
| Communication | EUSART, I2C, SPI |
| Core Independent Peripherals | COG, ZCD, PPS |
| Package | 16-QFN (4x4 mm) with Exposed Pad |
| Operating Temperature Range | -40C to +125C (Extended, -E suffix) |
| XLP Technology | nanoWatt XLP (eXtreme Low Power) |
| RoHS Status | Compliant |
| Pin Count | 16 |
| Mounting Type | Surface Mount |
PIC16F1703-E/ML Pin Configuration
| Pin 1 | RA0/AN0/C1IN+/ZCD — Analog input 0 / Comparator input / Zero Cross Detect |
| Pin 2 | RA1/AN1/C1IN-/ZCD — Analog input 1 / Comparator input / Zero Cross Detect |
| Pin 3 | RA2/AN2 — Analog input 2 / GPIO |
| Pin 4 | RA3/MCLR/VPP — Master Clear / Programming voltage (active low reset) |
| Pin 5 | RA4/AN3 — Analog input 3 / GPIO |
| Pin 6 | RA5/AN4 — Analog input 4 / GPIO |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA7/OSC1/CLKIN — Crystal oscillator input / external clock |
| Pin 9 | RA6/OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pin 10 | RC0/SCL/SCK — I2C clock / SPI clock / GPIO |
| Pin 11 | RC1/SDA/SDI — I2C data / SPI data in / GPIO |
| Pin 12 | RC2/SDO — SPI data out / GPIO |
| Pin 13 | RC3/SS — SPI slave select / GPIO |
| Pin 14 | RC4/TX/CK — EUSART TX / GPIO |
| Pin 15 | RC5/RX/DT — EUSART RX / GPIO |
| Pin 16 | VDD — Positive supply voltage |
Typical Applications
PIC16F1703-E/ML is suitable for 7 applications: LED Lighting Controllers with Dimming, Battery-Powered IoT Sensor Nodes, Small Motor and Fan Speed Control, Analog Front-End Signal Conditioning, Smart Home Sensor Modules, TRIAC and AC Load Dimming, Consumer Appliance User Interface.
LED Lighting Controllers with Dimming
The PIC16F1703-E/ML fits LED lighting controllers with dimming because its on-chip Complementary Output Generator (COG) produces complementary PWM pairs with programmable dead-band, while the Zero Cross Detect (ZCD) peripheral synchronizes dimming to AC line zero crossings. This eliminates software overhead and enables flicker-free TRIAC dimming or high-frequency DC-DC LED driving. With 32 MHz CPU bandwidth and PPS, designers can route PWM outputs to any I/O pin, simplifying PCB layout for multi-channel fixtures.
Recommended
Battery-Powered IoT Sensor Nodes
Battery-powered IoT sensor nodes benefit from the PIC16F1703-E/ML's nanoWatt XLP technology, which delivers sleep currents in the sub-microamp range and fast wake-up time. The 32 MHz core and 10-bit ADC support periodic sensor readings with computational filtering, while 1.8 V to 5.5 V VDD enables direct connection to single-cell Li-ion or 2x AA batteries without level shifting. The on-chip op amps condition analog sensors before ADC sampling, reducing BOM and PCB area in tight node enclosures.
Recommended
Small Motor and Fan Speed Control
Small motor and fan speed control applications fit the PIC16F1703-E/ML because the Enhanced CCP (ECCP) module delivers flexible PWM with complementary outputs, fault inputs, and auto-shutdown, while the on-chip op amps sense motor current for closed-loop control. The 32 MHz instruction rate (8 MIPS) provides the bandwidth for back-EMF sensing and PI control loops in brushed DC and small BLDC drivers, keeping firmware simple and BOM cost low.
Recommended
Analog Front-End Signal Conditioning
Analog front-end signal conditioning is a primary use case for the PIC16F1703-E/ML because it integrates two rail-to-rail op amps, two comparators with selectable references, a 5-bit DAC, and a 10-bit ADC. Designers can build complete transducer interfaces (bridge sensors, photodiodes, thermistors) on-chip, eliminating external amplifier ICs. The COG and ZCD peripherals handle analog-triggered digital responses without CPU intervention, freeing the core for higher-level processing.
Recommended
Smart Home Sensor Modules
Smart home sensor modules (motion, light, temperature) use the PIC16F1703-E/ML's low-power XLP modes to operate for years on a coin cell, while PPS allows late-stage routing changes between PCB variants. The I2C and SPI peripherals connect to external sensors or radios, and the 10-bit ADC with internal bandgap handles battery voltage monitoring. The 16-QFN 4x4 mm footprint fits miniature sensor puck form factors common in Zigbee, BLE, or LoRa modules.
Recommended
TRIAC and AC Load Dimming
TRIAC and AC load dimming is enabled by the PIC16F1703-E/ML's Zero Cross Detect (ZCD) peripheral which detects AC line zero crossings without external optocouplers, and the COG peripheral which generates anti-phase gate drive signals. This combination supports leading-edge and trailing-edge TRIAC dimming of lamps and heaters. The Extended temperature range (-40C to +125C) handles the thermal environment of closed lamp enclosures.
Recommended
Consumer Appliance User Interface
Consumer appliance user interfaces (HMI) with capacitive buttons, LED indicators, and rotary encoders fit the PIC16F1703-E/ML because its PWM drives LEDs directly while comparators handle rotary encoder quadrature. The on-chip op amps can amplify touch or proximity sensor signals, and the small 16-QFN package fits behind glass or plastic overlays. PPS remaps peripheral outputs to simplify PCB layout across multiple product variants sharing the same firmware.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1703-E/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1703-I/ML | PIC16F1825-I/ML | PIC16F1829-I/ML | PIC16F1614-E/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 16-QFN (4x4 mm) | 16-QFN (4x4 mm) - same | 16-QFN (4x4 mm) - same | 16-QFN (4x4 mm) - same | 16-QFN (4x4 mm) - same |
| Program Memory (Flash) | 3.5 KB | 3.5 KB | 14 KB | 14 KB | 3.5 KB |
| Data SRAM | 256 bytes | 256 bytes | 1024 bytes | 1024 bytes | 256 bytes |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| On-chip Op Amps | 2 | 2 | 0 | 0 | 0 |
| Operating Temperature Range | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) |
| Capacitive Touch (mTouch) | No | No | Yes | Yes | No |
| DAC | 5-bit | 5-bit | 5-bit | 10-bit | 8-bit |
| Approx Unit Price (qty 1, USD) | 0.94 | 0.85 | 1.10 | 1.20 | 0.88 |
Key Differentiators
- Integrated on-chip op amps eliminate external analog components (vs PIC16F1825-I/ML)
- Extended temperature grade for harsh environments (vs PIC16F1703-I/ML)
- Core Independent Peripherals (COG + ZCD) reduce CPU load (vs PIC16F1829-I/ML)
- Lower cost than newer 14KB Flash alternatives (vs PIC16F1829-I/ML)
Design Notes
The 16-QFN (4x4 mm) package has a center exposed thermal pad that MUST be soldered to a PCB copper pour of at least 25 mm^2 for proper thermal and electrical performance. Place a 100 nF ceramic decoupling capacitor within 3 mm of the VDD pin (pin 16), with the trace to VDD kept short and wide. The exposed pad should connect to VSS on the PCB; multiple thermal vias (8-12) under the pad significantly improve heat dissipation in higher-current analog applications.
Estimated: at 32 MHz CPU clock with all peripherals active, VDD = 3.3 V, the PIC16F1703-E/ML consumes approximately 2-3 mA active current. In sleep mode with nanoWatt XLP, this drops to sub-1 uA. For battery-powered designs, use the SLEEP/IDLE modes aggressively and wake the CPU via the Real-Time Clock, ADC, or Zero Cross Detect peripheral to keep average current below 50 uA for years-long battery life on a 220 mAh coin cell.
When using the on-chip op amps in analog signal-conditioning paths, isolate the analog and digital sections of the PCB. Route the analog input traces (RA0-RA5) away from PWM output traces and from the SPI clock line. Use a ground pour under the analog section to provide a quiet reference. Configure unused op amp inputs to mid-supply to avoid floating inputs causing shoot-through current. Use PPS carefully - reassigning peripherals mid-firmware requires disabling the peripheral first.
Do not skip the MCLR pull-up resistor if MCLR is enabled in the configuration bits. A floating MCLR pin causes spurious resets. The RA3/MCLR pin does NOT tolerate 5 V input when VDD is 3.3 V unless configured properly. The COG peripheral requires careful dead-band timing setup - too short risks shoot-through in the driven power switches, too long distorts the output waveform. Verify ADC acquisition time is sufficient for high-impedance analog sources (10 kohm or higher).
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; the -E temperature grade is a non-automotive specification for industrial environments. Lead-free and halogen-free per Microchip environmental compliance data.
