PIC16LF1509-I/SS - 8-Bit 20MHz 14KB Flash MCU | Microchip
MPN: PIC16LF1509-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.55 | $2.55 |
| 10 | $2.27 | $22.70 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.4 | $1,400.00 |
PIC16LF1509-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (RAM), non-volatile storage (EEPROM), and a rich set of peripherals such as timers, ADC, and communication interfaces into one IC. Within the broader semiconductor taxonomy, the PIC16LF1509 belongs to the 8-bit microcontroller family, which sits under the category of embedded microcontrollers, then integrated circuits, and ultimately semiconductors. The PIC® XLP™ (eXtreme Low Power) technology family targets applications where nanoWatt sleep currents extend battery life by orders of magnitude compared with conventional MCUs.
Key features include a 10-bit ADC with up to 12 channels, a 5-bit DAC, two 8-bit timers, one 16-bit timer, enhanced PWM modules, an MSSP module supporting I²C and SPI, an EUSART module supporting RS-232/RS-485, and an integrated temperature indicator. The device supports up to 20 MHz internal or external clock operation and offers nanoWatt XLP sleep modes drawing as little as 20 nA typical, plus a watchdog timer, brown-out reset, and on-chip debug.
Architecturally, the PIC16LF1509 uses a Harvard-style RISC core with a 14-bit instruction word, enabling single-cycle execution on most instructions. The 5-bit DAC and configurable logic cell (CLC) peripherals distinguish it within the PIC16F150x family by enabling hardware-configurable analog and digital signal generation without CPU intervention.
Typical applications include IoT sensor nodes, battery-powered remote controls, low-power wireless sensor platforms, LED lighting controllers, consumer white goods, and small appliances. The combination of 18 I/O, 14 KB Flash, and I²C/SPI/EUSART connectivity also fits well in industrial control and human-machine interface front-ends.
When designing with this device, confirm that your application runs from a supply within the 1.8 V–3.6 V LF window. For designs needing a 5 V tolerant or 5 V operating range, the non-LF PIC16F1509-I/SS variant in the same SSOP-20 footprint provides a drop-in path.
This page synthesizes distributor pricing, drop-in alternatives, application circuits, and design notes not found on the manufacturer product page alone.
Drop-in alternatives for PIC16LF1509-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 PIC16LF1509-I/SS (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Program Memory (Flash), Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1509-I/SS
✅ Drop-In✓ In Stock
$1.36 / Unit
View Datasheet →PIC16LF1509T-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1508-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1507-I/SS
✅ Drop-In✓ In Stock
$0.75 / Unit
View Datasheet →PIC16LF1459-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1509-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1509-I/SS Maximum Ratings & Electrical Characteristics
| Product Family | PIC® XLP™ 16F |
| CPU Core | PIC16 8-bit RISC |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 20 MHz |
| Operating Voltage | 1.8 V to 3.6 V |
| I/O Pins | 18 |
| ADC | 10-bit, up to 12 channels |
| DAC | 5-bit, 1 channel |
| Timers | 2 x 8-bit, 1 x 16-bit |
| PWM | Enhanced PWM, multiple outputs |
| Communication | I²C (MSSP), SPI (MSSP), EUSART (RS-232/RS-485) |
| Package | 20-pin SSOP (SS), 5.30 mm body, 0.65 mm pitch |
| Operating Temperature | -40 °C to +85 °C (industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
PIC16LF1509-I/SS Pin Configuration
| Pin 1 | RA0 — Bidirectional I/O pin / analog input |
| Pin 2 | RA1 — Bidirectional I/O pin / analog input |
| Pin 3 | RA2 — Bidirectional I/O pin / analog input |
| Pin 4 | RA3 — Bidirectional I/O pin / analog input / MCLR |
| Pin 5 | RA4 — Bidirectional I/O pin / analog input |
| Pin 6 | RA5 — Bidirectional I/O pin / analog input |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RB4 — Bidirectional I/O pin |
| Pin 9 | RB5 — Bidirectional I/O pin |
| Pin 10 | RB6 — Bidirectional I/O pin / ICSPCLK |
| Pin 11 | RB7 — Bidirectional I/O pin / ICSPDAT |
| Pin 12 | RC0 — Bidirectional I/O pin |
| Pin 13 | RC1 — Bidirectional I/O pin |
| Pin 14 | RC2 — Bidirectional I/O pin |
| Pin 15 | RC3 — Bidirectional I/O pin |
| Pin 16 | RC4 — Bidirectional I/O pin |
| Pin 17 | RC5 — Bidirectional I/O pin |
| Pin 18 | RC6 — Bidirectional I/O pin |
| Pin 19 | RC7 — Bidirectional I/O pin |
| Pin 20 | VDD — Positive supply voltage (1.8V to 3.6V) |
Typical Applications
PIC16LF1509-I/SS is suitable for 7 applications: IoT Sensor Node with Battery Power, Consumer Remote Control with Coin Cell, LED Lighting Controller, Industrial Sensor Transmitter, Small Appliance Control Board, Battery-Powered Wearable Device, HVAC Building Automation Sensor.
IoT Sensor Node with Battery Power
The PIC16LF1509-I/SS fits IoT sensor nodes because its 1.8V-3.6V LF supply range and nanoWatt XLP sleep modes (typical 20 nA) allow multi-year coin-cell operation. Its 14KB Flash and 512B SRAM can host a BLE radio control stack or LoRa SX127x driver alongside sensor sampling logic. With 18 I/O, the MCU directly interfaces I²C environmental sensors (BME280) and SPI accelerometers, while the 10-bit ADC reads analog sensors. Compared to higher-end Cortex-M0 parts, the PIC16LF1509 offers substantially lower sleep current and a smaller PCB footprint in the SSOP-20 package.
Recommended
Consumer Remote Control with Coin Cell
For TV remote, garage door opener, or RF remote control designs, the PIC16LF1509-I/SS provides IR or sub-GHz TX modulation via PWM and timer peripherals, with 14KB Flash supporting custom IR protocols and pairing logic. Its 20 MHz core handles NEC, RC5, and proprietary protocols with margin, while the 5-bit DAC can output audio feedback tones. The 1.8V minimum supply allows direct CR2032 coin-cell operation, and the SSOP-20 package fits inside slim remote housings.
Recommended
LED Lighting Controller
The PIC16LF1509-I/SS is well suited for addressable LED strip controllers because its enhanced PWM modules drive multiple RGB channels with hardware fade, freeing the CPU for protocol work. Its 14KB Flash accommodates WS2812B, APA102, or DMX-512 firmware, while the 5-bit DAC generates analog dim curves for legacy LED drivers. Running at 1.8V-3.6V, the LF variant supports USB-powered or battery-powered LED strips, and the SSOP-20 footprint integrates easily on small strip controller PCBs.
Recommended
Industrial Sensor Transmitter
For 4-20 mA loop-powered sensor transmitters, the PIC16LF1509-I/SS operates down to 1.8V from harvested loop power, with the 10-bit ADC digitizing bridge sensor or RTD signals at 12 channels. Its EUSART module drives RS-485 Modbus RTU links to PLCs, while the MSSP handles I²C calibration EEPROM access. The industrial -40C to +85C operating range covers most factory environments, and the SSOP-20 package supports reflow assembly on conformal-coated transmitter boards.
Recommended
Small Appliance Control Board
Coffee makers, toasters, and blenders use the PIC16LF1509-I/SS to drive TRIAC-controlled heating elements via PWM and zero-cross detection through the enhanced PWM modules. Its 14KB Flash supports capacitive touch and segmented LCD UI firmware, while the 18 I/O directly interface keypad switches, rotary encoders, and status LEDs. Operating from rectified 3.3V, the LF variant simplifies power supply design versus 5V MCUs.
Recommended
Battery-Powered Wearable Device
Wearable fitness bands, BLE beacons, and medical patches benefit from the PIC16LF1509-I/SS because the nanoWatt XLP sleep modes extend battery life to weeks on a CR2032. Its compact SSOP-20 package measures only 5.30 mm x 7.20 mm, fitting inside small form factors, while 18 I/O drive OLED displays, I²C PPG sensors, and SPI accelerometers. The 14KB Flash supports BLE beacon firmware, heart-rate algorithms, and OTA bootloader stubs.
Recommended
HVAC Building Automation Sensor
Building automation thermostats, CO2 sensors, and occupancy detectors deploy the PIC16LF1509-I/SS to read I²C environmental sensors (SHT30, CCS811) and drive HVAC zone actuators via PWM and UART. Its wide 1.8V-3.6V supply supports 24VAC-derived 3.3V rails common in HVAC systems, and the -40C to +85C industrial temperature range handles basement and rooftop enclosures. The 14KB Flash accommodates BACnet MS/TP or Modbus protocol stacks.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1509-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1509-I/SS | PIC16LF1509T-I/SS | PIC16LF1508-I/SS | PIC16LF1507-I/SS | PIC16LF1459-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP (SS) | 20-pin SSOP (SS) - same | 20-pin SSOP (SS) - same | 20-pin SSOP (SS) - same | 20-pin SSOP (SS) - same | 20-pin SSOP (SS) - same |
| Operating Voltage | 1.8 V to 3.6 V | 2.3 V to 5.5 V (wider window) | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V (same) |
| Flash Program Memory | 14 KB | 14 KB (same) | 14 KB (same) | 10 KB (-29%) | 8 KB (-43%) | 14 KB (same) |
| Data SRAM | 512 bytes | 512 bytes (same) | 512 bytes (same) | 512 bytes (same) | 512 bytes (same) | 1 KB (larger) |
| I/O Pins | 18 | 18 (same) | 18 (same) | 18 (same) | 18 (same) | 17 (-1) |
| USB 2.0 Support | No | No | No | No | No | Yes (Full-Speed) |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C (same) | -40 °C to +85 °C (same) | -40 °C to +85 °C (same) | -40 °C to +85 °C (same) | -40 °C to +85 °C (same) |
Key Differentiators
- Lowest voltage variant in the PIC16F150x family (vs PIC16F1509-I/SS)
- 14KB Flash at the LF voltage range (vs PIC16LF1508-I/SS)
- Includes 5-bit DAC for analog output (vs PIC16LF1459-I/SS)
Design Notes
The PIC16LF1509-I/SS LF supply range is 1.8 V to 3.6 V; operating above 3.6 V risks permanent damage per the absolute maximum rating of 4.0 V. Place a 100 nF decoupling capacitor as close as physically possible to the VDD pin (pin 20) to suppress switching noise from internal core transitions. For battery applications, add a 10 µF bulk capacitor on VDD to handle peak current transients when the ADC or PWM modules switch on.
Pin 4 / RA3 also serves as the MCLR reset input; leaving it floating will cause erratic resets because the internal weak pull-up is insufficient in noisy environments. Always tie RA3/MCLR to VDD through a 10 kΩ resistor (or directly to VDD if no external reset is needed) per the datasheet. Also, the ICSPDAT and ICSPCLK pins (RB7/RB6) require 4.7 kΩ pull-downs during in-circuit serial programming to avoid programmer communication failures.
Route the analog ADC inputs (RA0-RA5) away from PWM and digital switching traces; cross at 90° if needed. Place the ADC reference bypass (1 µF ceramic) directly at the VREF+ pin. Keep the SSOP-20 thermal pad (exposed pad is not present on this package, but the GND pin 7 still needs a strong ground pour connection) stitched with multiple vias to the internal ground plane for EMC immunity.
Compliance Information
RoHS and REACH compliant per Microchip product environmental compliance information. Not AEC-Q100 qualified - use automotive-qualified PIC16F1509-I/SS variants for vehicle applications. Lead-free and halogen-free per Microchip standard packaging specifications.
