PIC16F1703-E/SL - 8-bit XLP MCU, 3.5KB Flash, 14-SOIC | Microchip
MPN: PIC16F1703-E/SL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.55 | $1.55 |
| 10 | $1.38 | $13.80 |
| 100 | $1.15 | $115.00 |
| 500 | $0.97 | $485.00 |
| 1,000 | $0.82 | $820.00 |
PIC16F1703-E/SL Overview
An 8-bit microcontroller (MCU) is a small computer on a single integrated circuit that contains a simple processor core, program and data memory, and programmable I/O peripherals. PIC microcontrollers sit within the broader taxonomy of embedded microcontrollers → microcontrollers → microprocessors and microcomputers → semiconductors. The PIC16F family targets cost-sensitive, low-power, and intelligent-analog applications where advanced analog peripherals reduce external component count.
Key features of the PIC16F1703 include eXtreme Low Power (XLP) technology for nanoWatt sleep currents, two high-performance rail-to-rail op amps with software-selectable gain and bandwidth options, an 8-bit DAC reference output, complementary waveform generators, and multiple communication peripherals including I²C, SPI, and EUSART. The 10-bit ADC with computation automates averaging, filtering, and threshold comparison, offloading the CPU in sensor-interface designs.
Architecturally, the device uses a Harvard RISC core with a 14-bit instruction word, providing deterministic single-cycle execution except for branch instructions. PPS allows digital peripheral pins to be remapped to a wide range of physical I/O, simplifying PCB layout and BOM consolidation across product variants.
Typical applications include LED driving with constant-current regulation, sensor signal conditioning, AC zero-cross detection for TRIAC/SSR control, battery-powered IoT nodes, and small home appliances. The combination of integrated op amps and 10-bit ADC with computation makes it well suited for closed-loop analog control without external analog ICs.
When designing, allocate careful attention to the XLP sleep current budget (typically < 50 nA in real-world measurements) and verify PPS mapping of the chosen op-amp and ADC channels against the device header file. Adequate decoupling (100 nF + 1 µF) on VDD is recommended near the package pins.
This page synthesizes verified distributor pricing, drop-in alternatives from the same PIC16F1703 family and cross-brand 14-SOIC 8-bit MCU equivalents, and practical design notes that complement the Microchip datasheet.
Drop-in alternatives for PIC16F1703-E/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-E/SL (same form factor and footprint) — differing in Core, Package, ADC, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1703-I/SL
✅ Drop-In✓ In Stock
$0.87 / Unit
View Datasheet →PIC16F1703T-I/SL
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1705-I/SL
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.1 / Unit
View Datasheet →PIC16F1615-I/SL
✅ Drop-In✓ In Stock
$1.12 / Unit
View Datasheet →PIC16F1503-I/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.94 / Unit
View Datasheet →PIC16F1703-E/SL Maximum Ratings & Electrical Characteristics
| Core | 8-bit PIC RISC |
| Program Memory (Flash) | 3.5 KB (2K x 14 words) |
| Data RAM | 256 B |
| Maximum CPU Frequency | 32 MHz |
| Operating Voltage (VDD) | 1.8 V to 5.5 V |
| I/O Pins | 12 |
| ADC | 10-bit, up to 8 channels |
| DAC | 8-bit reference output |
| Operational Amplifiers | 2 on-chip rail-to-rail |
| Core Independent Peripherals | COG (Configurable Logic Cell), ZCD (Zero Cross Detect) |
| Peripheral Pin Select (PPS) | Yes |
| Communication Peripherals | I²C, SPI, EUSART |
| Low-Power Technology | XLP (nanoWatt) |
| Package | 14-pin SOIC (SL) 0.150 in body width |
| Operating Temperature Range | -40 °C to +125 °C (Extended) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F1703-E/SL Pin Configuration
| Pin 1 | RA5/ICSPDAT — Bidirectional I/O / ICSP data line |
| Pin 2 | RA4/AN3/T1G/ICSPCLK — Bidirectional I/O / Analog input 3 / Timer1 gate / ICSP clock |
| Pin 3 | RA3/MCLR/VPP — Bidirectional I/O / Master clear reset (active low) / Programming voltage |
| Pin 4 | RC5/RX/DT — Bidirectional I/O / EUSART RX / DT |
| Pin 5 | RC4/TX/CK — Bidirectional I/O / EUSART TX / CK |
| Pin 6 | RC3/CCP1/ZCD1 — Bidirectional I/O / CCP1 output / Zero Cross Detect input 1 |
| Pin 7 | RC2/AN6/OPA1IN+ — Bidirectional I/O / Analog input 6 / Op Amp 1 non-inverting input |
| Pin 8 | RC1/AN5/OPA1IN- — Bidirectional I/O / Analog input 5 / Op Amp 1 inverting input |
| Pin 9 | RC0/AN4/OPA1OUT — Bidirectional I/O / Analog input 4 / Op Amp 1 output |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RA2/AN2/OPA2OUT — Bidirectional I/O / Analog input 2 / Op Amp 2 output |
| Pin 12 | RA1/AN1/OPA2IN- — Bidirectional I/O / Analog input 1 / Op Amp 2 inverting input |
| Pin 13 | RA0/AN0/OPA2IN+ — Bidirectional I/O / Analog input 0 / Op Amp 2 non-inverting input |
| Pin 14 | VDD — Positive power supply (1.8 V to 5.5 V) |
Typical Applications
PIC16F1703-E/SL is suitable for 6 applications: AC Zero-Cross Dimmer Control, Battery-Powered IoT Sensor Node, Sensor Signal Conditioning with On-Chip Op Amps, LED Lighting Driver with Constant Current, Small Home Appliance Control, Industrial Process Sensor Interface.
AC Zero-Cross Dimmer Control
The PIC16F1703-E/SL is ideal for AC line zero-cross TRIAC and SSR dimming circuits because its integrated Zero Cross Detect (ZCD) peripheral senses AC mains zero crossings directly on a GPIO without external comparator circuits. With 32 MHz CPU performance and 14 SOIC pinout exposing 12 I/O, the MCU synchronizes TRIAC gate pulses within 100 µs of zero crossing, achieving flicker-free dimming of incandescent and LED loads. The 1.8 V–5.5 V VDD range supports direct operation from 3.3 V logic rails, while extended temperature grade -40 °C to +125 °C handles enclosed fixture thermal environments.
Recommended
Battery-Powered IoT Sensor Node
With XLP nanoWatt technology and 1.8 V minimum VDD, the PIC16F1703-E/SL serves as the central MCU for battery-powered wireless sensor nodes. Its 10-bit ADC with computation can autonomously perform averaging, filtering, and threshold comparison while the CPU remains in deep sleep, drawing typical 50 nA. The 3.5 KB Flash accommodates small protocol stacks (e.g., custom sub-GHz or BLE-bridged firmware), and 256 B RAM is sufficient for sensor buffering. The 14-pin SOIC enables compact PCB designs under 10 mm × 10 mm, ideal for coin-cell or 2xAAA powered deployments.
Recommended
Sensor Signal Conditioning with On-Chip Op Amps
The PIC16F1703-E/SL integrates two rail-to-rail operational amplifiers that amplify low-level transducer signals (e.g., thermistor bridges, strain gauges, photodiodes) directly on-chip without external analog ICs. Configurable gain and bandwidth settings allow per-channel tuning for different sensor types, while the 10-bit ADC samples the conditioned signal at up to 100 ksps. Designers save BOM cost and PCB area by eliminating one or two external op-amp packages. The 14-SOIC provides adequate analog pin access for both op-amp inputs and ADC channels via PPS routing.
Recommended
LED Lighting Driver with Constant Current
The PIC16F1703-E/SL's on-chip op amps combined with complementary waveform generators (COG) make it well suited for constant-current LED driver topologies. The op amp in transconductance configuration regulates current through a high-side MOSFET, while the COG peripheral generates PWM dimming signals synchronized to minimize flicker. Operating from 1.8 V–5.5 V VDD supports both 3.3 V and 5 V LED driver rails. The XLP nanoWatt sleep mode reduces standby power below 50 nA when LEDs are off, meeting ENERGY STAR standby requirements for smart lighting fixtures.
Recommended
Small Home Appliance Control
Coffee makers, blenders, toasters, and other small kitchen appliances benefit from the PIC16F1703-E/SL's combination of on-chip op amps (for temperature/weight sensing), ZCD (for motor phase control), and 32 MHz CPU (for user interface handling). The 14-SOIC package fits compact appliance control boards, and extended -40 °C to +125 °C temperature grade handles oven-proximity thermal stress. The 3.5 KB Flash holds user-interface state machines plus safety monitoring firmware, while 256 B RAM is sufficient for menu navigation buffers and sensor queues.
Recommended
Industrial Process Sensor Interface
In 4-20 mA loop-powered industrial transmitters, the PIC16F1703-E/SL digitizes process variables using its 10-bit ADC with hardware-averaging computation, reducing CPU wake events. The integrated op amps condition 4-20 mA sense resistor voltages down to ADC input range, while ZCD detects AC power-line-induced disturbances for noise rejection. The 14-SOIC extended temperature grade meets industrial -40 °C to +125 °C specifications. Hardware PPS allows routing of UART, SPI, or I²C HART modems to different pins without PCB redesign.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1703-E/SL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1703-I/SL | PIC16F1703T-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 | TSSOP-14 (ST) - same pinout, different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 3.5 KB | 3.5 KB | 3.5 KB | 8 KB (+129%) | 3.5 KB | 3.5 KB |
| On-chip Op Amps | 2 | 2 | 2 | 2 | 0 (-100%) | 0 (-100%) |
| Zero Cross Detect (ZCD) | Yes | Yes | Yes | Yes | No | No |
| Configurable Logic Cell (COG) | Yes | Yes | Yes | Yes | No | No |
| 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 |
| Temperature Grade | -40°C to +125°C (Extended) | -40°C to +85°C (Industrial) | -40°C to +85°C (Industrial) | -40°C to +85°C (Industrial) | -40°C to +85°C (Industrial) | -40°C to +85°C (Industrial) |
| Approx. Unit Price (qty 1) | $1.55 | $1.45 (-6%) | $1.50 (-3%) | $1.65 (+6%) | $1.20 (-23%) | $1.30 (-16%) |
Key Differentiators
- Integrated zero-cross detect (ZCD) peripheral eliminates external optocoupler/transformer (vs PIC16F1615-I/SL)
- Two on-chip rail-to-rail op amps remove external analog ICs (vs PIC16F1503-I/ST)
- Extended temperature grade to +125 °C for harsh environment (vs PIC16F1703-I/SL)
Design Notes
The PIC16F1703-E/SL's XLP nanoWatt technology achieves typical sleep currents below 50 nA when the CPU is halted and peripherals are gated off. Estimated: at VDD = 3.3 V and ambient temperature 25 °C, retaining only RTCC and watchdog draws approximately 50 nA per datasheet nanoWatt section. For battery-life calculations, use MCC-generated code templates which include verified sleep current examples. Place a 100 nF + 1 µF decoupling pair close to VDD pin 14 to suppress switching noise.
Route the ICSPDAT and ICSPCLK lines (RA5, RA4) directly to an in-circuit programming header with no series resistors or capacitors in the path. The MCLR/VPP pin (RA3) requires a 10 kΩ pull-up to VDD and a 100 nF capacitor to ground for proper reset behavior during programming pulses. Per the Microchip PIC16F1703 datasheet, place analog traces (AN0–AN6, OPA1OUT, OPA2OUT) away from digital switching lines to avoid ADC noise coupling; add a ground guard ring around sensitive analog inputs.
Do not confuse the E temperature grade suffix (-40 °C to +125 °C extended) with the I grade (-40 °C to +85 °C industrial) when substituting PIC16F1703-E/SL with PIC16F1703-I/SL; the E variant is required for enclosed lighting fixtures and oven-adjacent appliances. Also verify PPS remapping configurations against the device header file (PIC16F1703.h) before committing to PCB layout, since remapping peripheral outputs to different physical pins can cause silent failures if not validated against the device errata. Avoid enabling both op amps simultaneously at maximum bandwidth without verifying the cumulative quiescent current budget.
At typical MCU operating currents below 10 mA active and 50 nA sleep, self-heating of the 14-SOIC package is negligible (estimated <2 °C junction rise above ambient at 32 MHz active, 3.3 V). No thermal management is required for indoor appliance or lighting applications. However, in enclosed IP65-rated outdoor fixtures with sustained ambient temperatures near +125 °C, verify the E temperature grade is fully populated (not downgraded to I grade) per Microchip ordering code rules.
Compliance Information
RoHS and REACH compliant per Microchip product page. Lead-free and halogen-free packaging. PIC16F1703 family is not AEC-Q100 automotive qualified; for automotive designs consider PIC16F1703 with VAO suffix or PIC16F1xxx AEC-Q100 variants.
