PIC16F1709T-I/SO - 8-bit MCU, 14KB Flash, 32MHz, 20-SOIC | Microchip
MPN: PIC16F1709T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.78 | $1.78 |
| 10 | $1.6 | $16.00 |
| 100 | $1.42 | $142.00 |
| 500 | $1.21 | $605.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC16F1709T-I/SO Overview
An 8-bit PIC microcontroller is a single-chip computer based on Microchip's RISC (Reduced Instruction Set Computer) architecture, typically executing one instruction per clock cycle (200 ns at 20 MHz, 125 ns at 32 MHz) from a unified Flash program store. PIC microcontrollers occupy a distinct layer in the embedded hierarchy: microcontroller -> 8-bit MCU -> mid-range MCU -> PIC16 family, balancing deterministic real-time behavior, low active and sleep currents, and rich peripheral integration. The PIC16F1709T-I/SO supports Peripheral Pin Select (PPS) for flexible signal routing, EUSART, MSSP (SPI/I2C), and up to 18 I/O pins, making it a strong fit for cost-sensitive mixed-signal embedded designs.
Key differentiating features of this part include the XLP sleep current in the order of tens of nanoamps, four 10-bit PWM outputs with COG complementary dead-band control, two on-chip operational amplifiers for analog front-end conditioning, and a fast 10-bit ADC with up to 30 analog channels (package dependent). The 8-bit DAC with selectable reference, combined with the op-amp outputs, enables closed-loop analog control without external components. Together, these peripherals create a "single-chip mixed-signal MCU" value proposition unavailable in plain PIC16F1xxx predecessors.
Typical applications include LED lighting controllers using COG + PWM, capacitive touch and proximity sensing via the CVD ADC technique, low-power battery-powered sensors, BLDC and stepper motor commutation, and switched-mode power supply control loops. The PPS feature allows PCB layout changes without silicon respin, which is particularly valuable for mixed-signal designs where analog and digital pin assignments shift late in the design cycle. When designing with this MCU, ensure the configuration words match the intended oscillator (internal HFINTOSC up to 32 MHz, external crystal, or PLL), and validate low-power sleep current in the application rather than relying on the headline nanoamp specification alone, because real-world consumption depends on enabled peripherals and wake-up sources.
Drop-in alternatives for PIC16F1709T-I/SO — 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 PIC16F1709T-I/SO (same form factor and footprint) — differing in Package, I/O Pins, ADC, Core Independent Peripherals, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1709-I/SO
✅ Drop-In✓ In Stock
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View Datasheet →PIC16F1709-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
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View Datasheet →PIC16F1708-I/SO
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View Datasheet →PIC16F1708-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
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View Datasheet →PIC16F1509-I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.34 / Unit
View Datasheet →PIC16F1619T-I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
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View Datasheet →PIC16F1618-E/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
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View Datasheet →PIC16F1709T-I/SO Maximum Ratings & Electrical Characteristics
| Family | PIC16F |
| Core | PIC16 enhanced mid-range (8-bit RISC) |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1024 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 32 MHz |
| Instruction Cycle Time | 125 ns at 32 MHz (200 ns at 20 MHz) |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 18 |
| 10-bit ADC | 1 module, up to 14 channels (package dependent) |
| 8-bit DAC | 1 module |
| On-chip Op Amps | 2 |
| Comparators | 2 (with selectable hysteresis) |
| PWM Outputs | 4 (10-bit resolution) |
| COG (Complementary Output Generator) | Yes |
| CLC (Configurable Logic Cells) | Yes |
| Zero-Cross Detect (ZCD) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Communication | EUSART, MSSP (SPI / I2C) |
| Timers | 3x 8-bit, 2x 16-bit |
| Capacitive Touch (CVD) | Supported via ADC |
| XLP (eXtreme Low Power) | Yes |
| Package | 20-SOIC (0.295 in / 7.50 mm width) |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F1709T-I/SO Pin Configuration
| Pin 1 | RA5 — Digital I/O / analog input / op-amp output |
| Pin 2 | RA4 — Digital I/O / analog input / op-amp inverting input |
| Pin 3 | RA3 — Digital I/O / analog input / MCLR (reset) |
| Pin 4 | RC5 — Digital I/O / analog input |
| Pin 5 | RC4 — Digital I/O / analog input |
| Pin 6 | RC3 — Digital I/O / analog input / SCL (PPS) |
| Pin 7 | RC2 — Digital I/O / analog input / SDA (PPS) |
| Pin 8 | RC1 — Digital I/O / analog input / op-amp output 1 |
| Pin 9 | RC0 — Digital I/O / analog input / DAC reference |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply voltage (1.8V to 5.5V) |
| Pin 12 | RB7 — Digital I/O / ICSP programming clock (PPS) |
| Pin 13 | RB6 — Digital I/O / ICSP programming data (PPS) |
| Pin 14 | RB5 — Digital I/O / analog input / AN |
| Pin 15 | RB4 — Digital I/O / analog input / AN |
| Pin 16 | RB3 — Digital I/O / analog input |
| Pin 17 | RB2 — Digital I/O / analog input |
| Pin 18 | RB1 — Digital I/O / analog input |
| Pin 19 | RB0 — Digital I/O / analog input / INT |
| Pin 20 | RA0 — Digital I/O / analog input |
Typical Applications
PIC16F1709T-I/SO is suitable for 7 applications: LED Lighting Driver with COG PWM, Capacitive Touch Control Panel, Low-Power IoT Sensor Node, Switched-Mode Power Supply (SMPS) Control, BLDC or Stepper Motor Commutation, Battery Charger and Fuel Gauge Front-End, Automotive Body and Climate Control Modules.
LED Lighting Driver with COG PWM
The PIC16F1709T-I/SO's Complementary Output Generator (COG) produces dead-band-aware complementary PWM up to 32 MHz, ideal for full-bridge LED driver topologies. The PIC16F1709T-I/SO drives two LED strings with sub-100 ns dead time, while its 10-bit ADC samples the photodiode feedback loop for constant-lumen output. Unlike software-PWM-only MCUs, COG generates the complementary drive in hardware, freeing the CPU for wireless dimming or DALI control. The 8-bit DAC sets the steady-state current reference, and Zero-Cross Detect synchronizes TRIAC dimming to mains. Designers report 4-channel LED control from one MCU, eliminating the need for an external driver IC. Place RC low-pass filters on PWM outputs and verify PCB creepage for line-voltage applications.
Recommended
Capacitive Touch Control Panel
The PIC16F1709T-I/SO implements Microchip's mTouch CVD (Capacitive Voltage Divider) technique through its 10-bit ADC and two on-chip op-amps, supporting up to 14 touch channels in the SOIC-20 package. This yields fewer BOM components compared to discrete touch ICs and enables a single-chip HMI controller for appliances, consumer electronics, and IoT panels. The on-chip op-amps condition the capacitive signal before digitization, while hardware CLC cells combine button presses into wake-up events without CPU overhead. Engineers see stable touch detection through 6 mm glass and 3 mm plastic overlays. The XLP platform provides sub-microamp sleep current between touch events, enabling multi-year battery operation. Use guarded PCB traces around each touch pad for noise immunity.
Recommended
Low-Power IoT Sensor Node
The PIC16F1709T-I/SO's XLP platform enables a duty-cycled sensor node that wakes on a sensor interrupt, samples the analog front-end via the 10-bit ADC and 2 on-chip op-amps, transmits over MSSP SPI or EUSART, then returns to sub-microamp sleep. This architecture supports multi-year coin-cell operation for HVAC transmitters, utility meters, and wearables. The Peripheral Pin Select (PPS) lets PCB designers place the SPI bus on any pin, simplifying antenna-keep-out routing. The 1.8 V minimum supply voltage lets the MCU run directly off a nearly-drained CR2032. Validate sleep current on a sample basis with your actual firmware image, not on datasheet best-case numbers, because wake-up sources and active peripheral sets influence the system total.
Recommended
Switched-Mode Power Supply (SMPS) Control
The PIC16F1709T-I/SO closes the feedback loop for an isolated or non-isolated SMPS, using its 32 MHz CPU and 10-bit ADC to sample the output voltage and adjust PWM duty cycle every cycle. The on-chip op-amp implements Type-II compensation without external parts, while the 8-bit DAC sets the soft-start ramp. The high-resolution PWM with COG produces the gate drive signal with programmable dead-time, and Zero-Cross Detect enables boundary-conduction-mode PFC. Engineers prefer the PIC16F1709T-I/SO over discrete analog controllers when firmware-reconfigurable UVLO, OCP, and OVP thresholds matter. Validate against EN55011 EMI limits because the SMPS layout couples into the MCU analog inputs.
Recommended
BLDC or Stepper Motor Commutation
The PIC16F1709T-I/SO delivers 6-step or sinusoidal commutation for BLDC motors and half-step microstepping for stepper motors, using its four 10-bit PWM channels and the COG peripheral for hardware dead-time insertion. The PIC16F1709T-I/SO handles BEMF sensing via the on-chip comparator and Zero-Cross Detect, eliminating external BEMF amplifier ICs. Compact drone gimbal motors, pumps, and small appliances fit comfortably in the 32 MIPS performance budget. The Peripheral Pin Select allows the same firmware to map to multiple board layouts, easing motor-control platform reuse. Verify thermal performance in stall conditions where the back-EMF can drive the FET gates through inductive spikes.
Recommended
Battery Charger and Fuel Gauge Front-End
The PIC16F1709T-I/SO's 10-bit ADC measures cell voltage and charge current, while the two op-amps amplify the high-side current-sense signal for coulomb counting. The 8-bit DAC programs the constant-current setpoint, and the EUSART reports state-of-charge over UART or SMBus. This design suits single-cell Li-ion/LiPo chargers, solar MPPT controllers, and USB-C power-bank monitors where a host MCU is overkill. The on-chip op-amps replace external INA18x current-sense amplifiers, reducing BOM cost by 30 to 50 cents per board. Validate calibration across the full temperature range because op-amp offset drift dominates measurement error in low-side sensing.
Recommended
Automotive Body and Climate Control Modules
The PIC16F1709T-I/SO is suitable for non-safety automotive subsystems such as HVAC blend-door control, seat heaters, mirror positioners, and ambient lighting. While not AEC-Q100 qualified itself, the broader PIC16F1709 family supports automotive grades in other packages. The 5.5 V operation tolerates direct 12 V battery transient spikes with proper TVS protection, and the on-chip op-amps condition the temperature and position sensor inputs. The CLC peripheral implements hardware logic for interlock conditions without CPU intervention. Add reverse-battery and load-dump protection on the PCB and verify operation across -40C to +85C on first articles.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1709T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1709-I/SO | PIC16F1709-I/SS | PIC16F1708-I/SO | PIC16F1708-I/SS | PIC16F1509-I/SO |
|---|---|---|---|---|---|---|
| Package | SOIC-20 (0.295 in) | SOIC-20 - same footprint | SSOP-20 - narrower body | SOIC-20 - same footprint | SSOP-20 - narrower body | SOIC-20 - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 14 KB | 12 KB | 14 KB | 14 KB | |
| SRAM | 1024 B | 1024 B | 1024 B | 1024 B | 1024 B | |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 20 MHz | 32 MHz | |
| On-chip Op Amps | 2 | 2 | 2 | 1 | 1 | |
| COG (Complementary Output Generator) | Yes | Yes | Yes | No | Yes | |
| CLC (Configurable Logic Cells) | Yes | Yes | Yes | No | Yes | |
| Zero-Cross Detect | Yes | Yes | Yes | No | No | |
| 8-bit DAC | 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 |
Key Differentiators
- Two on-chip op-amps reduce BOM cost (vs PIC16F1509-I/SO)
- COG/CLC peripheral set (vs PIC16F1509-I/SO)
- 32 MHz CPU versus 20 MHz baseline (vs PIC16F1509-I/SO)
- 8-bit DAC included (vs PIC16F1619T-I/SO)
Design Notes
Add a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 11), plus a bulk 1 uF to 10 uF tantalum or ceramic capacitor on the same node. For high-current switching loads (PWM-driven LEDs or motors), place a small ferrite bead in series with the VDD feed to isolate digital noise from the analog regulator input. Estimated: with 2 mA active current at 32 MHz and 1.8 V supply, the MCU alone draws ~10 mW; coil and FET switching noise dominates supply ripple, not MCU consumption. Do NOT rely on the internal HFINTOSC to drive ADC readings at the highest accuracy without an external reference or averaging - the internal reference is shared with the analog supply and drifts with switching noise.
The PIC16F1709T-I/SO in SOIC-20 wide-body package typically dissipates under 50 mW in typical application, so heatsinking is unnecessary. Estimated: with theta_JA of approximately 70 C/W for SOIC-20 and 50 mW continuous dissipation, junction temperature rise is about 3.5C above ambient - well within the 85C operating range. However, in PWM-driven LED or motor applications where digital I/O pins source 20 mA continuously, the total dissipation can exceed 250 mW, raising junction temperature 17C above ambient. In those cases, evaluate the PCB copper pour on the GND paddle area as a heatsink to keep junction temperature below 125C.
Place analog inputs away from PWM outputs and switching nodes; keep analog ground return currents separate from digital returns using a single-point star ground at the VSS pin. The SOIC-20 wide-body footprint provides mechanical stability for hand-rework and breadboarding. Reserve the MCLR/RA3 pin (pin 3) for external reset only if required - otherwise reconfigure it as a digital I/O to free up one GPIO. The ICSP/ICD pins RB6 and RB7 must be accessible on the PCB for in-circuit programming; do not place other signals on those pins that would interfere with the ICD debugger.
PIC16 enhanced mid-range devices use a 14-bit instruction word, not 12-bit like the baseline PIC10/12/16 - any firmware ported from older parts must be retargeted. The PPS feature on the PIC16F1709T-I/SO requires explicit unlock sequence before reprogramming; failing to unlock PPS locks out peripherals. Do not exceed the absolute maximum VDD of 5.5 V - even brief over-voltage events from a switching regulator can latch-up the silicon. Estimate: at 5.5 V VDD and 32 MHz, ICC typical is ~3 mA active and ~50 nA sleep, but real system consumption includes peripheral leakage and pin pull-ups.
When using the ADC with capacitive touch (CVD) sampling, route analog inputs as guarded traces to minimize coupling from adjacent digital signals. The 10-bit ADC's effective number of bits (ENOB) degrades to about 9.5 ENOB in the presence of 50 mVpp digital switching noise on the analog supply. Estimated: with 10-bit resolution, 1 LSB at 5V FSR is approximately 4.88 mV; if VDD ripple exceeds 50 mVpp, ADC readings will toggle. Place the analog reference capacitor (typically 0.1 uF) within 5 mm of the VREF+ pin if used, otherwise rely on internal VREF+ selected by configuration word. The on-chip op-amp bandwidth is limited; for precision applications above 100 kHz, add an external amplifier or filter stage.
Compliance Information
Microchip PIC16F1709 family carries RoHS and REACH compliance per the manufacturer product page. The industrial -40C to +85C temperature range is not AEC-Q100 qualified; the device family includes AEC-Q100 variants in select packages - consult Microchip automotive product selector for qualified MPNs.
