PIC16F1703-E/ST - 8-Bit XLP MCU, 3.5KB Flash, 14-TSSOP | Microchip
MPN: PIC16F1703-E/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.17 | $1.17 |
| 10 | $1.05 | $10.50 |
| 100 | $0.94 | $94.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.78 | $780.00 |
PIC16F1703-E/ST Overview
An 8-bit microcontroller (MCU) is a self-contained computing element that integrates a CPU, non-volatile program memory, working RAM, and configurable peripheral blocks into a single IC. PIC microcontrollers belong to the microcontroller family (hypernym hierarchy: MCU -> microcontroller -> embedded controller -> semiconductor). They are commonly used as the main processing element in battery-powered and cost-sensitive embedded designs.
Key differentiating features of the PIC16F1703 include on-chip operational amplifiers (Op Amps), a Zero Cross Detect (ZCD) peripheral, Core Independent Peripherals (CIPs) such as the Configurable Logic Cell (CLC, sometimes called CLC/COG), and Peripheral Pin Select (PPS) for flexible signal routing. The device integrates a 10-bit ADC with computation, two 8-bit timers, one 16-bit timer, and PWM/SPI/I2C serial interfaces. Its XLP technology delivers typical sleep currents under 50 nA, making it suited to long-life battery applications.
Technically, the PIC16F1703 uses an enhanced mid-range 8-bit CPU core with hardware stack and 16-bit instruction words, paired with a 32MHz internal oscillator that can be trimmed. PPS lets designers remap digital peripheral outputs onto different I/O pins, reducing PCB routing complexity in dense designs.
Typical applications include low-power sensor nodes, household appliances, LED lighting controllers, smoke/CO detector signal conditioning, and small motor control loops. The integrated op amps and ZCD simplify AC zero-crossing detection for triac-based dimmers. Battery-powered IoT endpoints benefit from the XLP idle currents.
When designing with this MCU, observe the minimum Vdd of 2.3V for full-speed operation and provide adequate decoupling (100nF plus bulk) on Vdd/Vss pairs. PPS reassignment is non-volatile and must be configured in firmware before the peripheral is enabled.
This page synthesizes distributor pricing, drop-in alternatives, comparison tables, and practical design notes not found in the bare manufacturer datasheet.
Drop-in alternatives for PIC16F1703-E/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 PIC16F1703-E/ST (same form factor and footprint) — differing in Operating Temperature, Package, Timers, ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1703-I/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.84 / Unit
View Datasheet →PIC16F1704-E/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1503-E/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.52 / Unit
View Datasheet →PIC16F1613-E/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.85 / Unit
View Datasheet →PIC16F15224-E/ST
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F15324-E/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.89 / Unit
View Datasheet →PIC16F1703-E/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC enhanced mid-range |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| Data RAM | 256 bytes |
| Maximum CPU Frequency | 32 MHz (8 MIPS) |
| Supply Voltage (Vdd) | 2.3 V to 5.5 V |
| Operating Temperature | -40C to +125C (E grade, extended) |
| Package | 14-TSSOP (4.4 mm body, /ST) |
| Pin Count | 14 |
| ADC | 10-bit, with computation |
| On-chip Op Amps | Yes (2x, per family datasheet) |
| Zero Cross Detect (ZCD) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Timers | 2x 8-bit, 1x 16-bit (per family datasheet) |
| Serial Interfaces | I2C, SPI, EUSART (per family datasheet) |
| XLP Sleep Current | Typical < 50 nA (nanoWatt XLP) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (per TSSOP JEDEC J-STD-020) |
| RoHS Status | Compliant |
| Lead Finish | Matte tin (Pb-free) |
PIC16F1703-E/ST Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.3V-5.5V) |
| Pin 2 | RA5 — Bidirectional I/O with analog and interrupt capability |
| Pin 3 | RA4 — Bidirectional I/O with analog and interrupt capability |
| Pin 4 | RA3/MCLR — Bidirectional I/O or Master Clear (reset) input |
| Pin 5 | RA2 — Bidirectional I/O with analog capability |
| Pin 6 | RA1 — Bidirectional I/O with analog capability |
| Pin 7 | RA0 — Bidirectional I/O with analog capability |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RC0 — Bidirectional digital I/O |
| Pin 10 | RC1 — Bidirectional digital I/O |
| Pin 11 | RC2 — Bidirectional digital I/O |
| Pin 12 | RC3 — Bidirectional digital I/O |
| Pin 13 | RC4 — Bidirectional digital I/O |
| Pin 14 | RC5 — Bidirectional digital I/O |
Typical Applications
PIC16F1703-E/ST is suitable for 7 applications: Battery-Powered IoT Sensor Nodes, AC Zero-Cross Triac Dimmer Control, Small Appliance Control Boards, LED Lighting and Signage Controllers, Smoke and CO Detector Signal Path, Industrial Sensor Transmitters, Consumer Remote Controls and Key Fobs.
Battery-Powered IoT Sensor Nodes
The PIC16F1703-E/ST's nanoWatt XLP sleep current below 50 nA and 2.3V-5.5V supply range make it ideal for battery-powered wireless sensor endpoints measuring temperature, humidity, or motion. Its integrated 10-bit ADC with computation performs automated threshold detection without waking the CPU, while the on-chip op amps condition thermocouple or thermistor bridges directly. With 3.5KB Flash and 256B RAM, firmware fits comfortably for BLE beacon pairing, periodic sensor reads, and event-driven reporting. Real-world deployments achieve 5+ years on a CR2032 coin cell with duty-cycled measurement at 1Hz intervals.
Recommended
AC Zero-Cross Triac Dimmer Control
The PIC16F1703-E/ST integrates a Zero Cross Detect (ZCD) peripheral that simplifies AC mains zero-crossing detection for triac-based lamp dimmers and motor speed controllers. Unlike discrete zero-cross circuits, the on-chip ZCD requires only a few external resistors and avoids software timing jitter that causes flicker. The MCU computes phase-angle or zero-cross-count timing and fires the triac via PWM. Extended -40C to +125C temperature operation ensures reliability in enclosed fixtures. With 8 MIPS performance, the firmware handles dimming curves, soft-start, and push-button input decoding.
Recommended
Small Appliance Control Boards
Coffee makers, toaster ovens, blenders, and other small appliances benefit from the PIC16F1703-E/ST's mix of 14-pin TSSOP footprint, integrated op amps for current sensing, and 32MHz performance for real-time control loops. The on-chip op amps amplify shunt-resistor current signals directly without external ICs, reducing BOM cost. Zero Cross Detect synchronizes triac switching to AC mains, while PWM outputs drive solenoids and heaters with closed-loop regulation. The -40C to +125C temperature grade handles kitchen ambient heat. Serial I2C/SPI/EUSART interfaces connect to displays and BLE modules for smart-appliance variants.
Recommended
LED Lighting and Signage Controllers
The PIC16F1703-E/ST drives multi-channel LED strings with PWM-controlled brightness and color mixing, using its 10-bit ADC to read ambient light sensors and potentiometer dimmers. Peripheral Pin Select (PPS) lets designers route PWM outputs to any GPIO, simplifying PCB layout for RGB+W LED fixtures. The MCU's 32MHz performance supports smooth color fades and DMX-style protocol decoding. Low sleep current benefits battery-backed emergency LED signs that must standby for years. Extended temperature grade supports outdoor signage in harsh environments.
Recommended
Smoke and CO Detector Signal Path
Smoke detectors and carbon monoxide alarms use the PIC16F1703-E/ST to condition photoelectric or electrochemical sensor signals with its integrated op amps and 10-bit ADC. The ADC2 module performs automated threshold detection and averages samples for noise immunity, reducing false alarms. The MCU drives the audible alarm piezo via PWM and manages low-battery supervision on the same supply rail. XLP nanoWatt sleep extends battery life to 10 years on typical 9V or AA cells. Extended temperature grade ensures reliable operation across attic-cold to attic-hot extremes.
Recommended
Industrial Sensor Transmitters
Industrial 4-20mA current-loop transmitters and process sensor conditioners benefit from the PIC16F1703-E/ST's integrated op amps for bridge amplification and 10-bit ADC for digitizing transducer signals. The MCU calibrates the loop, computes engineering units, and outputs the current via PWM-filtered DAC or DAC-less op amp circuit. The -40C to +125C extended temperature range handles industrial environments. UART/SPI interfaces connect to HMI displays and configuration tools. PPS simplifies routing in compact field-mount enclosures with constrained PCB area.
Recommended
Consumer Remote Controls and Key Fobs
The PIC16F1703-E/ST is well-suited to low-cost RF remote controls and key fobs where battery life, cost, and integration matter most. The on-chip op amps can condition resistive touch or capacitive buttons without external components, while XLP nanoWatt sleep currents allow multi-year standby on coin cells. The MCU wakes on button press, transmits IR/RF, and returns to sleep within milliseconds. 14-TSSOP fits the smallest key fob form factors. Extended temperature grade handles automotive cabin environments for entry-fob applications.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1703-E/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1703-I/ST | PIC16F1704-E/ST | PIC16F1503-E/ST | PIC16F1613-E/ST | PIC16F15224-E/ST |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | 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 | 14-TSSOP (/ST) - same |
| Program Memory (Flash) | 3.5 KB | 3.5 KB | 7 KB (+100%) | 3.5 KB | 3.5 KB | 3.5 KB |
| Data RAM | 256 B | 256 B | 512 B (+100%) | 256 B | 256 B | 256 B |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +125C (E grade) |
| On-Chip Op Amps | Yes (2x) | Yes (2x) | Yes (2x) | No | No | No |
| Zero Cross Detect (ZCD) | Yes | Yes | Yes | No | No | No |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- On-chip op amps integrated at no extra cost (vs PIC16F1503-E/ST)
- Zero Cross Detect peripheral simplifies AC mains designs (vs PIC16F1613-E/ST)
- Extended temperature grade in standard part number (vs PIC16F1703-I/ST (industrial grade))
Design Notes
Decouple Vdd with a 100nF ceramic capacitor placed within 5mm of pin 1, plus a bulk capacitor (1-10uF) on the same rail. For battery applications, use a ferrite bead or LC filter between the battery and Vdd to suppress transient surges when the load switches. The PIC16F1703-E/ST's nanoWatt XLP mode draws under 50 nA typical sleep current; verify this in your specific configuration since enabled peripherals (ADC, op amps) increase sleep draw.
Place the ICSPDAT/ICSPCLK traces near the MCU with minimal stub length; route them with the rest of the signal traces but keep them short to avoid coupling noise into programming. Keep analog signals (RA0-RA5) routed away from PWM/digital outputs. Use a continuous ground plane under the MCU and place decoupling capacitors with short, wide traces to Vdd/Vss to minimize inductance.
Do not exceed 5.5V on Vdd or reverse polarity - the MCU has no internal protection. The MCLR pin (RA3) is used for ICSP programming and reset; if left floating, add a 10k pull-up to Vdd. The Peripheral Pin Select (PPS) must be configured in firmware before the peripheral is enabled, otherwise I/O will not function. Forgetting this is a common source of 'dead' peripherals on first prototypes.
Compliance Information
RoHS compliant with matte-tin Pb-free plating per Microchip environmental compliance. Not AEC-Q100 qualified (industrial/consumer grade only). All packaging materials meet REACH SVHC requirements.
