PIC16F1709-I/ML - 8-bit MCU, 14KB Flash, 32MHz, 20-QFN | Microchip
MPN: PIC16F1709-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.98 | $1.98 |
| 10 | $1.78 | $17.80 |
| 100 | $1.59 | $159.00 |
| 500 | $1.42 | $710.00 |
| 1,000 | $1.28 | $1,280.00 |
PIC16F1709-I/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and programmable I/O peripherals. The PIC16 family uses a RISC Harvard architecture with 14-bit instructions and 200 ns instruction execution. Within the broader MCU taxonomy, the PIC16F1709 belongs to the enhanced mid-range PIC16(L)F170X/171X series that emphasizes cost-effective analog integration, sitting between baseline PIC10/12/16F and the higher-pin PIC18/dsPIC families.
Key features include eXtreme Low Power (XLP) technology with sub-1 µA sleep currents, 4x 10-bit ADC channels up to 100 ksps, 1x 8-bit DAC, 2x op amps with programmable gain, EUSART, I2C/SPI, two CCP/PWM modules, and 18 I/O pins. PPS allows digital peripheral signals to be remapped onto any of the I/O pins, simplifying board layout and reducing pin conflicts when peripherals are added or removed. The internal 32 MHz oscillator provides 8 MIPS throughput without external components.
The Intelligent Analog architecture integrates high-performance analog blocks alongside the digital core, enabling sensor conditioning, signal generation, and closed-loop control without external components. Zero-Cross Detect and the Complementary Output Generator support power-factor-corrected motor and lighting control, while CLCs implement glue logic in hardware without code overhead, offloading the CPU for deterministic real-time response.
Typical applications include LED lighting with dimming and color mixing, low-power IoT sensor nodes, small appliance control, battery chargers, DC-DC converter control loops, and general-purpose analog signal conditioning. The wide 1.8 V to 5.5 V operating range and XLP low-power modes suit coin-cell and energy-harvesting designs.
Design considerations: enable the watchdog timer and brown-out reset in safety-critical firmware; route PPS-mapped outputs carefully to avoid bus contention. Use the ADC with the internal FVR for absolute voltage references above VDD. Compared with discrete analog designs, on-chip op amps trade absolute precision for BOM reduction and PCB simplicity.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not typically consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC16F1709-I/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 PIC16F1709-I/ML (same form factor and footprint) — differing in ADC, Package, Timers, I/O Pins, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1708-I/ML
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16F1709-I/SO
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC16F1709-I/SS
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16F1719-I/ML
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F1615-I/ML
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.84 / Unit
View Datasheet →PIC16F1509-I/ML
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1709-I/ML Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC (Harvard) |
| Program Memory | 14 KB Flash (8K x 14 words) |
| Data Memory (RAM) | 1024 bytes |
| Max CPU Speed | 32 MHz (8 MIPS) |
| Operating Voltage | 1.8 V to 5.5 V |
| I/O Pins | 18 |
| ADC | 10-bit, up to 100 ksps |
| DAC | 8-bit, 1 channel |
| Comparators | 2x high-speed |
| Op Amps | 2x on-chip |
| Timers | 4x 8-bit, 2x 16-bit |
| Communication | EUSART, I2C, SPI |
| PWM/CCP | 2x CCP, 2x PWM |
| Package | 20-pin QFN (4x4 mm) |
| Operating Temperature | -40C to +85C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16F1709-I/ML Pin Configuration
| Pin 1 | RA5 — I/O / OPA1IN+ / DACREF1+ |
| Pin 2 | RA4 — I/O / OPA1OUT |
| Pin 3 | RA3 — I/O / VREF+ (ADC reference) |
| Pin 4 | RA2 — I/O / DAC1OUT1 / OPA1IN- |
| Pin 5 | RA1 — I/O / OPA2IN+ / ICSPCLK |
| Pin 6 | RA0 — I/O / OPA2OUT / ICSPDAT |
| Pin 7 | VSS — Ground reference |
| Pin 8 | VDD — Positive supply voltage (1.8V-5.5V) |
| Pin 9 | RA7 — I/O / ZCD / OPA2IN- |
| Pin 10 | RA6 — I/O / OPA1IN- |
| Pin 11 | RC7 — I/O |
| Pin 12 | RC6 — I/O / TX/CK (EUSART) |
| Pin 13 | RC5 — I/O |
| Pin 14 | RC4 — I/O / SDA (I2C) |
| Pin 15 | RC3 — I/O / SCL (I2C) / SCK (SPI) |
| Pin 16 | RC2 — I/O / SDO (SPI) / PWM |
| Pin 17 | RC1 — I/O / CCP2 / SDI (SPI) |
| Pin 18 | RC0 — I/O / CCP1 / PWM |
| Pin 19 | RB7 — I/O |
| Pin 20 | RB6 — I/O / ICD PGC |
Typical Applications
PIC16F1709-I/ML is suitable for 6 applications: LED Lighting with Dimming Control, Battery-Powered IoT Sensor Nodes, Small Appliance and Fan Control, Smart Battery Chargers, DC-DC Converter Control Loops, General-Purpose Analog Signal Conditioning.
LED Lighting with Dimming Control
The PIC16F1709-I/ML is ideal for LED lighting applications requiring smooth analog dimming and color mixing. Its on-chip 8-bit DAC and two op amps enable constant-current LED driver feedback loops, while the Complementary Output Generator (COG) and PWM modules deliver flicker-free phase-shifted MOSFET drive for high-efficiency buck/boost topologies. The 32 MHz core easily handles DMX or DALI protocol parsing at 1 Mbps, and XLP low-power modes keep standby current below 1 µA for energy-star compliance.
Recommended
Battery-Powered IoT Sensor Nodes
The PIC16F1709-I/ML suits coin-cell and energy-harvesting IoT sensor nodes thanks to its eXtreme Low Power (XLP) technology with sub-1 µA sleep current. The 10-bit ADC with internal Fixed Voltage Reference (FVR) interfaces directly with temperature, light, and motion sensors, while the integrated op amps condition low-level analog signals without external ICs. PPS allows flexible sensor-to-pin routing, and the 14 KB Flash supports BLE/Zigbee stack libraries or LoRaWAN application code.
Recommended
Small Appliance and Fan Control
Small appliance motor and fan control designs benefit from the PIC16F1709-I/ML's Complementary Output Generator (COG), which produces hardware-timed complementary PWM for half-bridge drivers without CPU overhead. Zero-Cross Detect (ZCD) enables TRIAC-based AC dimming and motor soft-start, while configurable logic cells implement safety interlocks deterministically. The 32 MHz MIPS throughput handles closed-loop PID control at 1 kHz loop rates, and the 20-QFN footprint fits into compact BLDC ceiling fan boards.
Recommended
Smart Battery Chargers
The PIC16F1709-I/ML implements single-cell Li-ion and lead-acid charger topologies with its integrated 10-bit ADC for V/I sensing, two op amps for current-loop feedback, and 8-bit DAC for programmable reference voltages. CCP/PWM modules generate the switching control signal at up to 32 kHz for switching pre-regulators. The wide 1.8-5.5 V operating range accommodates battery-pack telemetry directly, and XLP sleep modes prevent battery drain when the charger is idle but still attached.
Recommended
DC-DC Converter Control Loops
Digital DC-DC converter control benefits from the PIC16F1709-I/ML's high-speed ADC, op amps, and PWM modules running at deterministic 32 MHz. The integrated op amp senses inductor current directly, while the 8-bit DAC sets the reference voltage for voltage-mode control loops. CLCs implement hardware-based cycle-by-cycle current limiting with sub-microsecond response, freeing the CPU for telemetry and PMBus/I2C communication. The small QFN-20 footprint suits compact POL modules under 1 square inch.
Recommended
General-Purpose Analog Signal Conditioning
The PIC16F1709-I/ML replaces discrete analog front-end designs in instrumentation and process-control modules. Two rail-to-rail op amps provide signal gain and filtering, the 10-bit ADC digitizes at up to 100 ksps, and the configurable logic cells (CLC) generate gate-control signals based on threshold events. Peripheral Pin Select (PPS) routes comparator outputs and PWM signals to any I/O pin, simplifying PCB layout in dense mixed-signal boards. The 14 KB Flash supports calibration tables and look-up algorithms.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1709-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1708-I/ML | PIC16F1709-I/SO | PIC16F1709-I/SS | PIC16F1719-I/ML | PIC16F1615-I/ML |
|---|---|---|---|---|---|---|
| Package | 20-QFN (4x4 mm) | 20-QFN (4x4 mm) - same | 20-SOIC - same electrical | 20-SSOP - same electrical | 20-QFN (4x4 mm) - same | 20-QFN (4x4 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 7 KB | 14 KB | 14 KB | 28 KB | 14 KB |
| RAM | 1024 B | 512 B | 1024 B | 1024 B | 2048 B | 1024 B |
| On-Chip Op Amps | 2 | 2 | 2 | 2 | 2 | 0 |
| 8-bit DAC | Yes | Yes | Yes | Yes | Yes | No |
| Max CPU Speed | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) |
| 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 |
Key Differentiators
- Only PIC16F170X member with two on-chip op amps plus 8-bit DAC in QFN-20 (vs PIC16F1615-I/ML)
- Upward-compatible code migration path within same footprint (vs PIC16F1708-I/ML)
- Compact 4x4 mm QFN footprint for space-constrained designs (vs PIC16F1709-I/SO)
Design Notes
The PIC16F1709-I/ML supports 1.8 V to 5.5 V supply and features eXtreme Low Power (XLP) technology. Sleep currents are below 1 µA typical. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin and a 1 µF bulk capacitor for transient suppression. The brown-out reset (BOR) should be enabled in firmware to prevent undefined behavior during brown-out events. For battery applications, enable the Low-Power Sleep mode with Timer1 oscillator running for periodic wake-up.
The 20-QFN package has an exposed thermal pad (EP) on pin 21 (the bottom pad) that must be soldered to a copper pad on the PCB for proper thermal dissipation. Recommended minimum copper pad area is 6x6 mm² to ensure theta_JA stays below 50 °C/W. For applications drawing more than 30 mA continuous, attach vias from the thermal pad to an internal ground plane to spread heat. Do not connect the EP to digital signal traces or analog high-impedance nodes.
Place the ICSP programming header (RA0/RA1 + VDD/VSS/MCLR) on the board edge for in-system programming access. MCLR must be pulled up to VDD through a 10 kΩ resistor with a 100 nF capacitor to VSS for reset signal conditioning. Keep analog traces (OPA inputs, ADC channels) short and away from PWM switching traces to minimize digital noise coupling. Use a ground plane on layer 2 directly beneath the MCU to provide low-impedance return paths for high-frequency signals.
When using Peripheral Pin Select (PPS), remember that digital peripherals like EUSART TX/CK and SPI SCK must be unmapped and remapped through PPS unlock sequence. Concurrent use of PPS-mapped outputs on the same pin causes bus contention. The Complementary Output Generator (COG) requires the COG1STR, COG1FIS, COG1RIS registers to be configured before enabling; incorrect sequencing may lock the complementary outputs. The on-chip op amps must be enabled through the OPAxCON register before use, or pin behavior remains high-impedance.
The 10-bit ADC achieves best performance when the source impedance is below 10 kΩ to allow adequate sampling time at 100 ksps. Add an external buffer amplifier or RC filter if the source impedance exceeds this threshold. The internal Fixed Voltage Reference (FVR) stabilizes after 10 µs typical; allow this settling time before triggering ADC conversions. For high-resolution measurements, disable digital I/O toggling on adjacent analog channels during ADC sampling to reduce cross-channel digital switching noise.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - the part targets industrial/consumer applications. Industrial temperature grade -40C to +85C. Halogen-free status not explicitly stated in verified data.