PIC16F1703-I/SL - 8-bit 32MHz MCU 3.5KB Flash 14-SOIC | Microchip
MPN: PIC16F1703-I/SL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.46 | $14.60 |
| 100 | $1.21 | $121.00 |
| 500 | $1.02 | $510.00 |
| 1,000 | $0.87 | $870.00 |
PIC16F1703-I/SL Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash), data memory (RAM), and peripherals into one device. The PIC16F1703 belongs to the Microchip PIC16F family of enhanced mid-range MCUs that use a modified Harvard RISC architecture, executing one instruction every two clock cycles (200ns at 32MHz). It fits into the broader hierarchy: 8-bit MCU -> microcontroller -> embedded IC -> semiconductor. Low-power 8-bit MCUs are widely used in battery-powered and sensor-edge designs where deterministic behavior and low sleep current are critical.
Key features include on-chip operational amplifiers (Op Amps), 10-bit ADC with computation, Core Independent Peripherals (Complementary Output Generator and Zero Cross Detect), Peripheral Pin Select (PPS), and an enhanced PWM module. The device provides 12 I/O pins, an internal 31kHz to 32MHz oscillator, and active current as low as 35uA/MHz with sleep current of approximately 50nA in XLP mode.
The PIC16F1703 uses CMOS flash technology with nanowatt power management, enabling precise analog signal conditioning directly on-chip. The Peripheral Pin Select (PPS) feature allows remapping of digital peripherals to different I/O pins, increasing PCB layout flexibility. With 8-channel 10-bit ADC and zero cross detect for AC signal handling, this part is tailored to cost-sensitive mixed-signal applications.
Typical applications include LED lighting control, capacitive touch sensing, sensor signal conditioning, small appliance control, fan control, and battery-powered IoT edge nodes. Designers value the combination of analog peripherals and XLP technology for tight BOM and long battery life.
When designing with this MCU, ensure proper decoupling (100nF near VDD) and follow Microchip's MPLAB X IDE for firmware development. The 14-SOIC (SL) package provides hand-solder-friendly access while still supporting high-volume SMT assembly. Avoid relying solely on the internal oscillator for USB timing applications - this part does not include a USB peripheral.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet alone, providing a one-stop engineering reference for BOM selection and second-source qualification.
Drop-in alternatives for PIC16F1703-I/SL — 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/SL (same form factor and footprint) — differing in Package, ADC, Core, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1703-I/SL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1704-I/SL
✅ Drop-In✓ In Stock
$0.97 / Unit
View Datasheet →PIC16F1705-I/SL
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16F1615-I/SL
✅ Drop-In✓ In Stock
$1.12 / Unit
View Datasheet →PIC16F1503-I/ST
✅ Drop-In✓ In Stock
$0.94 / Unit
View Datasheet →PIC16F1703-I/SL Maximum Ratings & Electrical Characteristics
| Core | PIC16 8-bit RISC |
| Program Memory (Flash) | 3.5KB (2K x 14 words) |
| Data Memory (SRAM) | 256 bytes |
| CPU Speed | 32 MHz max (200 ns instruction cycle) |
| Operating Voltage | 2.3 V to 5.5 V |
| I/O Pins | 12 |
| ADC | 10-bit, 8 channels |
| DAC | 8-bit, 1 channel |
| Comparators | 2 |
| Operational Amplifiers | 2 on-chip |
| PWM Channels | Enhanced PWM, multiple channels |
| Core Independent Peripherals | COG, Zero Cross Detect, PPS |
| Timers | 8-bit and 16-bit timers |
| Communication | I2C, SPI, EUSART (enhanced USART) |
| Package | 14-pin SOIC (SL) |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
PIC16F1703-I/SL Pin Configuration
| Pin 1 | RA5/SOSC1/ICSPCLK — Bidirectional I/O / Secondary oscillator / ICSP clock |
| Pin 2 | RA4/SOSC0/ICSPDAT — Bidirectional I/O / Secondary oscillator / ICSP data |
| Pin 3 | RA3/MCLR/VPP — Bidirectional I/O / Master clear (reset) / Programming voltage |
| Pin 4 | RC5 — Bidirectional I/O |
| Pin 5 | RC4 — Bidirectional I/O |
| Pin 6 | RC3 — Bidirectional I/O |
| Pin 7 | RC2 — Bidirectional I/O |
| Pin 8 | RC1 — Bidirectional I/O |
| Pin 9 | RC0 — Bidirectional I/O |
| Pin 10 | RA2 — Bidirectional I/O |
| Pin 11 | RA1/ICSPCLK — Bidirectional I/O / ICSP clock |
| Pin 12 | RA0/ICSPDAT — Bidirectional I/O / ICSP data |
| Pin 13 | VSS — Ground reference |
| Pin 14 | VDD — Positive supply voltage (2.3V-5.5V) |
Typical Applications
PIC16F1703-I/SL is suitable for 6 applications: LED Lighting Control & Dimming, Capacitive Touch Sensing Interface, Sensor Signal Conditioning & IoT Edge Nodes, Small Appliance Motor Control, Industrial Control & Process Automation, Consumer Electronics & User Interface.
LED Lighting Control & Dimming
The PIC16F1703-I/SL is well-suited for constant-current LED driver and dimming control applications, where its two on-chip op amps form closed-loop current-sense feedback with the 10-bit ADC, while the 8-bit DAC or PWM sets the dimming reference. Operating at 32MHz, the MCU can sample ADC and update PWM at high refresh rates for flicker-free dimming down to 0.1%. According to the Microchip datasheet (DS40001722C), the Complementary Output Generator (COG) peripheral enables hardware-based dead-band control for synchronous LED driver stages, reducing firmware overhead. Compared with discrete analog controllers, this part integrates current sensing and digital dimming in a single 14-pin SOIC package, reducing BOM count and PCB area. The XLP 50nA sleep current allows battery-backed emergency lighting designs. Typical reference: PIC16F1703 + external MOSFET + sense resistor for 1A LED string.
Recommended
Capacitive Touch Sensing Interface
The PIC16F1703-I/SL is ideal for capacitive touch buttons and sliders, leveraging the mTouch peripheral library and zero cross detect (ZCD) for noise-immune sensing. According to the Microchip PIC16(L)F1703 datasheet (DS40001722C), the Core Independent Peripherals - particularly COG and ZCD - allow event-driven touch scanning without CPU wake-up, supporting ultra-low standby power for battery-powered touch panels. The 32MHz instruction cycle supports 1ms touch-scan loops for 10+ buttons. Combined with the on-chip op amps as analog front-ends, the MCU detects proximity and force in metal-over-cap designs. Compared with dedicated touch ICs, this MCU adds firmware flexibility (gestures, slider position algorithms) while maintaining low BOM cost. Typical implementation: PIC16F1703 + 12 touch electrodes + I2C-to-host communication.
Recommended
Sensor Signal Conditioning & IoT Edge Nodes
The PIC16F1703-I/SL targets battery-powered sensor edge nodes (temperature, pressure, gas) where its 2 on-chip op amps, 8-channel 10-bit ADC, and XLP 50nA sleep mode enable years of operation on coin-cell batteries. According to Microchip's XLP datasheets, active current is 35uA/MHz at 2V, allowing multi-year battery life for periodic-sampling sensors. The on-chip op amps can be configured as transimpedance amplifiers for photodiodes or thermistor bridges directly feeding the ADC, eliminating external analog ICs. Compared with discrete signal-chain designs, this single-chip approach reduces BOM and PCB size. The Peripheral Pin Select (PPS) allows flexible pin assignments, simplifying routing in compact sensor modules. Typical use: PIC16F1703 + I2C sensor + SPI flash for data logging.
Recommended
Small Appliance Motor Control
The PIC16F1703-I/SL drives low-power brushless DC (BLDC) and brushed DC motors in small appliances, integrating on-chip op amps for current sensing, 10-bit ADC for back-EMF detection, and enhanced PWM for switching. According to Microchip application notes for the PIC16F170x family, the Core Independent Peripherals (COG, ZCD) provide hardware-based commutation timing, reducing firmware complexity. The MCU's 32MHz operation allows 25kHz PWM for quiet motor operation. Compared with dedicated motor-control ICs, this general-purpose MCU provides flexibility for variable-speed, fault-detection, and user-interface features in a 14-SOIC footprint. Typical reference: PIC16F1703 + 3-phase MOSFET bridge + Hall sensor input.
Recommended
Industrial Control & Process Automation
The PIC16F1703-I/SL serves industrial control applications including 4-20mA loop transmitters, isolator modules, and PLC I/O expanders. According to the Microchip datasheet (DS40001722C), the industrial -40C to +85C temperature range and 5.5V operation support harsh factory-floor environments. The on-chip op amps buffer and condition 4-20mA signals directly to the ADC; the EUSART enables RS-485 communication; PPS allows flexible pin assignment for optocoupler interfaces. Compared with specialized industrial ICs, this part provides general-purpose I/O and user programmability for custom protocols. Typical use: PIC16F1703 + RS-485 transceiver + isolation barrier for industrial sensor node.
Recommended
Consumer Electronics & User Interface
The PIC16F1703-I/SL is suited for consumer products such as remote controls, smart home switches, and household appliances needing low-power control with analog sensing. According to the Microchip PIC16(L)F1703 datasheet, the 32MHz core and 3.5KB Flash support state-machine-based UI logic with capacitive touch, IR transmit/receive, and basic display driving. The I2C/SPI/EUSART interfaces allow connection to displays, sensors, or wireless modules. The XLP 50nA sleep current allows multi-year battery life for remote controls and wall switches. Compared with higher-pin-count MCUs, this 14-SOIC part offers the right balance of capability and cost for cost-sensitive consumer products. Typical use: PIC16F1703 + IR LED + capacitive buttons + battery.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1703-I/SL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1703-I/SL | PIC16F1704-I/SL | PIC16F1705-I/SL | PIC16F1615-I/SL | PIC16F1503-I/ST |
|---|---|---|---|---|---|---|
| Package | 14-SOIC (SL) | 14-SOIC (SL) - same | 14-SOIC (SL) - same | 14-SOIC (SL) - same | 14-SOIC (SL) - same | 14-TSSOP (ST) - footprint compatible |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 3.5 KB (2K x 14) | 3.5 KB | 4 KB | 8 KB | 14 KB | 5.5 KB |
| Data Memory (SRAM) | 256 bytes | 256 bytes | 256 bytes | 512 bytes | 1 KB | 128 bytes |
| Operating Voltage | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels |
| On-Chip Op Amps | 2 | 2 | 2 | 2 | 0 | 0 |
| CPU Speed (max) | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 20 MHz |
Key Differentiators
- On-chip dual op amps eliminate external analog front-end (vs PIC16F1615-I/SL)
- Core Independent Peripherals (COG, ZCD, PPS) reduce firmware overhead (vs PIC16F1503-I/ST)
- Lowest-cost entry into PIC16F XLP family with op amps (vs PIC16F1705-I/SL)
Design Notes
Decouple VDD (pin 14) with a 100nF ceramic capacitor placed within 5mm of the pin, plus a 10uF bulk capacitor if VDD comes from a switching regulator. The PIC16F1703-I/SL draws up to ~10mA active at 32MHz/5V, so adequate decoupling is critical. For battery applications, the XLP sleep mode draws ~50nA - ensure no leakage paths from VDD to other pins in sleep state. Estimated: at 32MHz, 5V, fully active, ICC ~ 10mA typical.
Place the ICSP programming header (ICSPDAT/ICSPCLK on pins 1 and 2 or 11 and 12) on the PCB even if not used in production - it allows firmware updates and debugging without rework. Keep analog signal traces away from PWM or switching signals; use a ground pour under the MCU. The PPS feature allows remapping of peripherals to different I/O pins - assign high-frequency peripherals (PWM, EUSART) to pins closest to their external circuitry.
Do not leave MCLR (pin 3) floating when not used as a reset input - tie it to VDD through a 10k resistor to prevent spurious resets. The internal oscillator is accurate to +/-2% typically, so designs requiring UART communication above 9600 baud may need calibration or an external crystal. For I2C communication, ensure proper pull-up resistors (typically 4.7k for 100kHz, 2.2k for 400kHz) on SDA/SCL lines. When using the ADC, allow at least 5us acquisition time and use the FVR or VDD as voltage reference, not an external pin, unless precision demands it.
Compliance Information
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature range. Not AEC-Q100 qualified - this is a general-purpose MCU. Choose PIC16F1703-E/SL variants for extended temperature or PIC16F1703T-I/SL for tape & reel packaging.
