PIC16F1509-I/SS - 8-Bit 20MHz 14KB Flash MCU | Microchip | SSOP-20
MPN: PIC16F1509-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $1.97 | $19.70 |
| 100 | $1.74 | $174.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.36 | $1,360.00 |
PIC16F1509-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), working RAM, and peripheral I/O on one die. The 8-bit class uses a RISC architecture optimized for deterministic, low-power control of LEDs, sensors, motors, and user interfaces. PIC16F1509 sits in the mid-range PIC® family — between the baseline 8-pin PIC10/12 and the enhanced 16-bit PIC24/dsPIC families — targeting applications that need more peripherals than a PIC12 but lower cost and simpler toolchain than a 32-bit Cortex-M MCU. It belongs to the power-management-aware XLP (eXtreme Low Power) sub-family with nanoWatt sleep currents below 1 µA.
Key features include 18 I/O pins with interrupt-on-change, four 10-bit PWM channels, two Capture/Compare/PWM (CCP) modules, a master I²C/SPI/EUSART peripheral, a 5-bit DAC and 10-bit ADC with automatic CVD for capacitive touch, four CLC blocks for glue-logic replacement, and an NCO for precision frequency synthesis. The on-chip 32 MHz internal oscillator eliminates external crystals in cost-sensitive designs. XLP technology enables <50 nA typical sleep current for battery applications.
Typical applications are LED lighting controllers, capacitive-touch user interfaces, fan/small-motor control, and battery-powered sensor nodes. The integrated NCO can replace external DACs for tone generation or dimming, while CLCs let designers replace discrete gates/timers with on-chip logic, reducing BOM cost and PCB area.
Drop-in alternatives for PIC16F1509-I/SS — 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 PIC16F1509-I/SS (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Timers, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1509-I/SO
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View Datasheet →PIC16F1509-E/SS
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View Datasheet →PIC16F1509T-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F1508-I/SS
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1507-I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.92 / Unit
View Datasheet →PIC16F1459-I/SS
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$1.55 / Unit
View Datasheet →PIC16F15344-I/SS
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View Datasheet →PIC16F1509-I/SS Maximum Ratings & Electrical Characteristics
| Core | PIC16 / 8-bit RISC |
| Family | PIC® XLP™ 16F |
| Program Memory (Flash) | 14 KB (8K x 14) |
| RAM | 512 bytes |
| EEPROM | 128 bytes |
| Maximum CPU Frequency | 20 MHz |
| Operating Voltage (Vdd) | 2.3 V to 5.5 V |
| I/O Pins | 18 |
| ADC | 10-bit, 12-channel |
| DAC | 5-bit, 1 channel |
| PWM Channels | 4 (10-bit) |
| Comparators | 2 |
| Package | 20-pin SSOP |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| Core Independent Peripherals | CLC (4), NCO (1), CWG (1), CVD |
| Communications | EUSART, I²C, SPI |
| Internal Oscillator | 31 kHz LF + 32 MHz HF (factory calibrated) |
PIC16F1509-I/SS Pin Configuration
| Pin 1 | RA5/AN4/CWG1A/CLC3IN1/OSC1 — Bidirectional I/O / Analog ch4 / CWG output A / CLC input 1 / Crystal osc in |
| Pin 2 | RA4/AN3/CLC3IN0/OSC2 — Bidirectional I/O / Analog ch3 / CLC input 0 / Crystal osc out |
| Pin 3 | RA3/MCLR/Vpp — Bidirectional I/O / Master Clear (Reset, active low) / Programming voltage |
| Pin 4 | RA2/AN2/C1OUT/DAC5OUT1 — Bidirectional I/O / Analog ch2 / Comparator 1 output / 5-bit DAC output |
| Pin 5 | RA1/AN1/C1IN+/CLC2IN0/ICSPCLK — Bidirectional I/O / Analog ch1 / Comparator 1 in+ / CLC input / Programming clock |
| Pin 6 | RA0/AN0/C1IN-/ICSPDAT — Bidirectional I/O / Analog ch0 / Comparator 1 in- / Programming data |
| Pin 7 | Vss — Ground reference |
| Pin 8 | RA7/AN6/NCO1/CLC1IN0 — Bidirectional I/O / Analog ch6 / NCO output / CLC input |
| Pin 9 | RA6/AN5 — Bidirectional I/O / Analog ch5 |
| Pin 10 | RC0/SCL/SCK — Bidirectional I/O / I²C SCL / SPI SCK |
| Pin 11 | RC1/SDA/SDI — Bidirectional I/O / I²C SDA / SPI SDI |
| Pin 12 | RC2/AN10/C2IN+/SDO — Bidirectional I/O / Analog ch10 / Comparator 2 in+ / SPI SDO |
| Pin 13 | RC3/AN11/C2IN-/SS — Bidirectional I/O / Analog ch11 / Comparator 2 in- / SPI Slave Select |
| Pin 14 | RC4/AN8/C2OUT/TX/CK — Bidirectional I/O / Analog ch8 / Comparator 2 out / EUSART TX / clock |
| Pin 15 | RC5/AN9/RX/DT — Bidirectional I/O / Analog ch9 / EUSART RX / data |
| Pin 16 | Vdd — Positive supply (2.3 V to 5.5 V) |
| Pin 17 | RB7/AN7/CWG1B — Bidirectional I/O / Analog ch7 / CWG output B |
| Pin 18 | RB6/CLC4OUT — Bidirectional I/O / CLC output |
| Pin 19 | RB5/AN13/CCP1/P1A — Bidirectional I/O / Analog ch13 / CCP1 / PWM1 output A |
| Pin 20 | RB4/AN10/P1B/CCP2 — Bidirectional I/O / Analog ch10 / PWM1 output B / CCP2 |
Typical Applications
PIC16F1509-I/SS is suitable for 6 applications: LED Lighting Controllers, Capacitive-Touch User Interfaces, Small Motor and Fan Control, Battery-Powered Sensor Nodes, Consumer Appliance Control Boards, Industrial Sensor Transmitters.
LED Lighting Controllers
The PIC16F1509-I/SS is well-matched to entry-level constant-current LED drivers and RGB color-mixing lamps. Its four 10-bit PWM channels deliver 1024-step dimming resolution, while the 32 MHz internal HF oscillator provides accurate PWM frequency without external crystals. The integrated Complementary Waveform Generator (CWG) produces dead-band-controlled complementary outputs for half-bridge LED strings, eliminating external gate-driver timing logic. With 14 KB Flash, designers can run Microchip's free DMX-512 or DALI software stacks. The XLP sleep mode below 50 nA lets a wall-switch unit last years on a coin cell for wireless retrofits.
Recommended
Capacitive-Touch User Interfaces
With its on-chip 10-bit ADC plus hardware Capacitive Voltage Divider (CVD) and Microchip's mTouch library, the PIC16F1509-I/SS can scan up to 12 capacitive buttons or a slider in 20-SSOP without an external touch IC. CVD automates charge/measure cycles and provides superior moisture immunity versus pure firmware CRC approaches. Combined with the four Configurable Logic Cells (CLC), designers can implement automatic wake-on-touch behaviour where the CPU sleeps while the CLC watches the sensor pad, then wakes the core via interrupt - perfect for appliance front panels and IoT wall switches.
Recommended
Small Motor and Fan Control
The PIC16F1509-I/SS drives brushed DC motors and BLDC fans using its four 10-bit PWM channels and the CWG with programmable dead-band, achieving 20 kHz switching without CPU load. The two on-chip comparators can be wired directly to a current-sense shunt for cycle-by-cycle over-current protection, shutting down PWM in hardware before the MOSFETs exceed safe operating area. With 18 I/O and 14 KB Flash, Microchip's free AN1078 sensorless BLDC firmware fits comfortably, enabling production-ready fan controllers under $1.50 in BOM cost.
Recommended
Battery-Powered Sensor Nodes
The PIC16F1509-I/SS's nanoWatt XLP technology delivers sleep currents under 50 nA with the 32 kHz LF oscillator running and RAM retention, enabling multi-year coin-cell operation for wireless temperature, humidity, or door/window sensors. Its 12-channel 10-bit ADC reads thermistors or analog sensors directly, while the NCO block generates accurate wake-up intervals without timer interrupts. Combined with an SPI-connected sub-GHz radio, an entire sensor node BOM fits under $5 with Microchip's free LoRaWAN stack.
Recommended
Consumer Appliance Control Boards
Coffee makers, washing-machine front panels, and air-conditioner remotes benefit from the PIC16F1509-I/SS's mix of 10-bit ADC for NTC temperature sensing, PWM for triac-fired heater control, and EUSART for HMI display modules. The four CLCs replace discrete logic gates that older appliance designs needed for sequencing and interlocks, shrinking the PCB. With 14 KB Flash and Microchip's Class B certified firmware libraries, this part also accelerates IEC 60730 functional-safety certification for white goods.
Recommended
Industrial Sensor Transmitters
For 4-20 mA loop-powered or IO-Link-compatible sensor transmitters, the PIC16F1509-I/SS in 20-SSOP provides the ADC, PWM (for current loop) and EUSART (for IO-Link) needed in a single chip. The Numerically Controlled Oscillator (NCO) synthesizes high-precision PWM frequencies for the 4-20 mA loop without jitter, while the 32 MHz internal HF oscillator eliminates the external crystal and improves shock/vibration reliability. The wide 2.3 V to 5.5 V supply range also supports direct operation from unregulated 24 V industrial rails via a low-dropout regulator.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1509-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1509-I/SO | PIC16F1509-E/SS | PIC16F1508-I/SS | PIC16F1459-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP | 20-SOIC | 20-SSOP | 20-SSOP | 20-SSOP |
| Flash Memory | 14 KB | 14 KB | 14 KB | 7 KB | 14 KB |
| RAM | 512 bytes | 512 bytes | 512 bytes | 256 bytes | 1 KB |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 48 MHz |
| Operating Voltage | 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 | 2.3 V to 5.5 V |
| I/O Pins | 18 | 18 | 18 | 18 | 17 |
| Temperature Grade | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Extended -40 °C to +125 °C | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C |
| USB | No | No | No | No | Yes (USB 2.0 FS) |
Key Differentiators
- Largest memory in 20-pin PIC16F150x family (vs PIC16F1508-I/SS)
- Integrated CLCs, NCO, and CWG (Core Independent Peripherals) (vs PIC16F1459-I/SS)
- Smaller footprint than SOIC variant (vs PIC16F1509-I/SO)
- Industrial temperature grade vs Extended variant (vs PIC16F1509-E/SS)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible (within 3 mm) to the Vdd pin (pin 16) and another between Vss (pin 7) and the same Vdd node. Estimated: a single 100 nF X7R cap provides effective decoupling from 1 MHz to 100 MHz for the PIC16F1509's 20 MHz core. Add a bulk 10 µF tantalum or ceramic on the supply rail to handle I/O switching transients. The Vdd/Vss pair must be tied with short, wide traces to avoid supply bounce during CCP/PWM events.
Keep the MCLR pin (pin 3) high through a 10 kΩ pull-up to Vdd; add a 100 nF cap to ground only if in-circuit debug is required (MCP2201, PICkit) - in production, no capacitor on MCLR is recommended so that the internal weak pull-up dominates during slow Vdd ramps. Route the analog pins RA0-RA7 and RC2-RC5 away from PWM-switching traces to avoid coupling noise into the ADC; analog ground and digital ground can share a single Vss plane if no high-current traces run beneath the analog pins.
Estimated: writing to Flash while an interrupt fires from a CCP module can cause inadvertent code corruption. Always disable GIE while performing flash self-programming sequences, and use Microchip's NVMREG write sequence from the PIC16F1509 datasheet (DS40001622C). Also note that the ADC acquisition time is 1.6 µs minimum; do not read ADC immediately after switching the channel - insert at least one T_AD wait. Finally, the I²C peripheral is SMBus-compatible but NOT fully VCC-tolerant above 5.5 V - never drive SDA/SCL above Vdd + 0.3 V or the input ESD diode will latch-up.
In the 20-SSOP package, the PIC16F1509 dissipates very little heat (< 100 mW typical). Estimated: at 20 MHz and 5 V the core current is about 7 mA (35 mW), and at sleep below 1 µA the power collapses. For thermal layout, no copper pour or thermal vias are required beyond standard signal traces. In contrast, the 20-SOIC variant can dissipate up to 800 mW at 5 V but that is over-spec for normal operation; design margins typically keep the part below 200 mW.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - choose /VAO or PIC16F1509-E/SS for automotive applications. REACH SVHC compliance verified per Microchip environmental statement.
