PIC16F1509-I/SO - 14KB Flash 20MHz 8-bit MCU | Microchip | SOIC-20
MPN: PIC16F1509-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $1.96 | $19.60 |
| 100 | $1.72 | $172.00 |
| 500 | $1.52 | $760.00 |
| 1,000 | $1.34 | $1,340.00 |
PIC16F1509-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on one die, used to sense, decide, and actuate in embedded systems. Within the product hierarchy, the PIC16F1509 sits as: 8-bit MCU -> PIC16 enhanced mid-range -> PIC16F1xxx family -> flash MCU -> embedded microcontroller. It competes with other low-power 8-bit MCUs in the PIC16, PIC18 and ATmega/AVR families, and is positioned for cost-sensitive applications that still require modern analog and logic peripherals.
Key features of the PIC16F1509 include XLP™ eXtreme Low Power technology for sub-microamp sleep currents, an integrated 16 MHz internal oscillator (factory calibrated to ±1%), 17 I/O pins with interrupt-on-change, a 10-bit ADC with up to 14 channels, two comparators, two 10-bit PWMs and four 8-bit PWMs, plus the previously mentioned CIPs. The device operates across 1.8 V to 5.5 V and is rated from -40 °C to +85 °C in the industrial "-I" temperature grade.
Architecturally, the PIC16F1509 uses Microchip's enhanced mid-range 14-bit instruction core with a 200 ns instruction cycle at 20 MHz, an 8-level hardware stack, and a vectored interrupt controller. Program memory is accessed through a 14-bit wide flash bus that supports self-programmability, while data EEPROM supports single-word read/write. The CIPs allow complex timing, waveform generation, and combinational logic without CPU intervention, offloading real-time tasks and reducing firmware complexity.
Typical applications include LED lighting and signage controls, consumer appliances, low-power sensor nodes, battery chargers, fan and pump controls, and general-purpose digital logic replacement. Its combination of CIPs, low power, and small footprint also suits smart-home IoT end nodes and human-machine interface (HMI) panels.
When designing with this part, evaluate the internal oscillator accuracy against your serial-communication baud-rate tolerance, size the decoupling per the datasheet, and use the CLC/NCO/CWG peripherals to consolidate external glue logic. For long-term product support, verify the specific SOIC-20 ordering code (PIC16F1509-I/SO vs. PIC16F1509-E/SO vs. PIC16LF1509-I/SO) against your voltage and temperature requirements.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, enabling faster component selection for engineers evaluating 8-bit flash MCUs.
Drop-in alternatives for PIC16F1509-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 PIC16F1509-I/SO (same form factor and footprint) — differing in ADC, Package, Operating Temperature, Program Memory (Flash), Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1508-I/SO
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16F1509-I/P
✅ Drop-In✓ In Stock
$1.43 / Unit
View Datasheet →PIC16F1509-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1507-I/SO
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16F1509-I/ML
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1509-I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC16 enhanced mid-range 8-bit |
| Architecture | 14-bit instruction RISC |
| Program Memory (Flash) | 14 KB (8K x 14) |
| Data SRAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Speed | 20 MHz (200 ns instruction cycle) |
| Operating Voltage (VDD) | 1.8 V to 5.5 V |
| I/O Pins | 17 |
| ADC | 10-bit, up to 14 channels |
| Comparators | 2 |
| PWM Channels | 2x 10-bit + 4x 8-bit |
| Internal Oscillator | 16 MHz, factory calibrated ±1% |
| Core Independent Peripherals | CLC, NCO, CWG, ZCD |
| Operating Temperature | -40 °C to +85 °C (Industrial, -I) |
| Package | 20-pin SOIC (SO), 300-mil |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16F1509-I/SO Pin Configuration
| Pin 1 | RA0/AN0/CWG1FLT/CLCIN0/ICSPDAT — Bidirectional I/O / Analog input / CWG fault input / CLC input / ICSP data |
| Pin 2 | RA1/AN1/CWG2FLT/CLCIN1/ICSPCLK — Bidirectional I/O / Analog input / CWG fault input / CLC input / ICSP clock |
| Pin 3 | RA2/AN2/CLCIN2/VREF- — Bidirectional I/O / Analog input / CLC input / ADC negative reference |
| Pin 4 | RA3/MCLR/VPP — Master Clear (reset) / ICSP programming voltage; can also be general input |
| Pin 5 | RA4/AN3/CWG1OUT/CLCIN3/T0CKI — Bidirectional I/O / Analog input / CWG1 output / CLC input / Timer0 clock |
| Pin 6 | RA5/AN4/CWG2OUT/CLCIN4 — Bidirectional I/O / Analog input / CWG2 output / CLC input |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RA6/AN5/CWG1FLT/CLCIN5/OSC2/CLKOUT — Bidirectional I/O / Analog input / CWG1 fault / CLC input / Crystal output / Clock out |
| Pin 9 | RA7/AN6/CWG2FLT/CLCIN6/OSC1/CLKIN — Bidirectional I/O / Analog input / CWG2 fault / CLC input / Crystal input / Clock in |
| Pin 10 | RB0/AN7/CCP1/SDA/CLCIN7 — Bidirectional I/O / Analog input / CCP1 / I2C data / CLC input |
| Pin 11 | RB1/AN8/CCP2/SCL — Bidirectional I/O / Analog input / CCP2 / I2C clock |
| Pin 12 | RB2/AN9/PWM4 — Bidirectional I/O / Analog input / PWM4 output |
| Pin 13 | RB3/AN10/CCP3/PWM5 — Bidirectional I/O / Analog input / CCP3 / PWM5 output |
| Pin 14 | RB4/AN11/PWM6 — Bidirectional I/O / Analog input / PWM6 output |
| Pin 15 | RB5/AN12/PWM7 — Bidirectional I/O / Analog input / PWM7 output |
| Pin 16 | RB6/AN13/ICSPDAT/CWG1OUT — Bidirectional I/O / Analog input / ICSP data / CWG1 output |
| Pin 17 | RB7/AN14/ICSPCLK/CWG2OUT — Bidirectional I/O / Analog input / ICSP clock / CWG2 output |
| Pin 18 | VDD — Positive supply voltage (1.8 V to 5.5 V) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VOUT/FVR/VDD — Voltage regulator output / Fixed voltage reference / tied to VDD |
Typical Applications
PIC16F1509-I/SO is suitable for 7 applications: LED Lighting and Signage Control, Consumer Appliance Control, Low-Power IoT Sensor Node, Battery Charger Controller, Fan and Pump Motor Control, HMI Panel and Keypad Controller, Industrial Logic and Glue Replacement.
LED Lighting and Signage Control
The PIC16F1509-I/SO is well suited for LED lighting and signage controllers because its Configurable Logic Cells (CLC), Complementary Waveform Generator (CWG), and four 10-bit PWM channels allow on-the-fly generation of complex dimming sequences without burdening the CPU. The 14 KB flash holds DMX-512 or DALI frame handlers, while the 17 I/O drive MOSFET drivers and discrete LED strings. The wide 1.8 V to 5.5 V supply supports direct 3.3 V or 5 V rails, and XLP™ low-power modes suit battery-backup emergency fixtures.
Recommended
Consumer Appliance Control
In washing machines, dishwashers, and small kitchen appliances, the PIC16F1509-I/SO delivers 14 KB flash for the main control loop plus 256 B EEPROM for fault-log and configuration storage that survives power loss. The 10-bit ADC scans temperature sensors and water-level probes, the comparators handle zero-crossing detection for TRIAC-fired heaters, and the CWG drives the universal motor or BLDC pre-driver. The 1.8 V start-up voltage lets designers wake from battery-backed RTCs, while the SOIC-20 package survives conformal coating and wave-soldering rework.
Recommended
Low-Power IoT Sensor Node
The PIC16F1509-I/SO is an excellent fit for battery-powered wireless sensor nodes, especially with the Microchip RN2483 LoRa or MRF24J40 2.4 GHz modules. Its XLP™ technology yields sub-1 µA sleep current, the 14 KB flash fits a small RTOS or state-machine, and the 10-bit ADC quantizes thermistor, photodiode, or soil-moisture sensors. The Numerically Controlled Oscillator (NCO) can synthesize a 16 MHz interrupt or RF clock without a crystal, cutting BOM cost, while the Zero-Cross Detect (ZCD) peripheral simplifies AC mains-sensing smart-plug designs.
Recommended
Battery Charger Controller
The PIC16F1509-I/SO is well matched to multi-chemistry battery charger controllers: the 10-bit ADC reads voltage and current shunts, the comparators enforce CC/CV thresholds with hardware-grade response time, and the CWG + CLC peripherals form a synchronous buck or boost PFC without DSP code. The 14 KB flash holds the charge profile tables and state machine, while 256 B EEPROM stores learned-capacity parameters. The 1.8 V minimum VDD supports low-battery cut-off and direct Li-ion cell sensing without a separate ADC chip.
Recommended
Fan and Pump Motor Control
Sensorless BLDC, brushed DC, and small induction motor control all benefit from the PIC16F1509-I/SO's on-chip CWG and PWM peripherals. The CWG generates complementary gate-drive waveforms with programmable dead-time, while the 10-bit ADC samples back-EMF for sensorless commutation. Four 8-bit PWMs plus two 10-bit PWMs handle multi-phase fan hubs. The 17 I/O interface Hall-effect sensors, tachometer inputs, and fault shut-down outputs. The SOIC-20 mechanical robustness and -40 °C to +85 °C range suit under-hood automotive and industrial fan applications.
Recommended
HMI Panel and Keypad Controller
The PIC16F1509-I/SO is a strong fit for keypad, encoder, and small-segment-LCD HMI panels: the CLCs implement debounce and quadrature decoding in hardware, the CWG drives piezo buzzers, and 17 I/O pins multiplex a 4x4 matrix keypad with interrupt-on-change wake-up. The 14 KB flash holds multilingual menu strings, while 512 B SRAM buffers scan events. The 1.8 V to 5.5 V supply and SOIC-20 footprint integrate easily into dishwasher, microwave, or industrial-control front panels where space is tight but I/O density is high.
Recommended
Industrial Logic and Glue Replacement
Engineers often replace 74-series CMOS glue logic, op-amps, and discrete timers with the PIC16F1509-I/SO because the CLCs can implement any combinational logic in hardware (replacing 74HC gates), the NCO synthesizes precise 16-bit frequencies (replacing 555 timers), and the ZCD detects AC-line zero-crossings (replacing opto-isolated ZCD circuits). The 14 KB flash and 256 B EEPROM hold factory calibration, while the CWG outputs the resulting PWM, clock, or zero-cross pulse. The wide 1.8 V to 5.5 V supply lets the same part substitute in legacy 3.3 V and 5 V boards.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1509-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1508-I/SO | PIC16F1509-I/P | PIC16F1509-E/SO | PIC16F1507-I/SO | PIC16F1509-I/ML |
|---|---|---|---|---|---|---|
| Package | 20-pin SOIC (SO) | 20-pin SOIC (SO) - same | 20-pin PDIP (P) | 20-pin SOIC (SO) - same | 20-pin SOIC (SO) - same | 20-pin QFN (ML) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 14 KB | 7 KB | 14 KB | 14 KB | 3.5 KB | 14 KB |
| Data SRAM | 512 bytes | 256 bytes | 512 bytes | 512 bytes | 128 bytes | 512 bytes |
| Data EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 128 bytes | 256 bytes |
| Maximum CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ADC Channels | 14 | 12 | 14 | 14 | 12 | 14 |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | -40 °C to +125 °C (Extended) | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) |
| Core Independent Peripherals (CLC/NCO/CWG/ZCD) | All four present | All four present | All four present | All four present | Reduced set | All four present |
| Lifecycle Status | Active | Active | Active | Active | Active | Active |
Key Differentiators
- More flash and SRAM on the same SOIC-20 footprint (vs PIC16F1508-I/SO)
- Industrial temperature range at standard price (vs PIC16F1509-E/SO)
- SOIC-20 SMT package with full CIP peripheral set (vs PIC16F1507-I/SO)
Design Notes
The PIC16F1509-I/SO requires a 0.1 µF ceramic decoupling capacitor placed within 5 mm of the VDD pin (pin 18) and another on VSS (pin 19). The on-chip FVR (Fixed Voltage Reference) draws approximately 25 µA when active; disable FVR before entering Sleep to achieve the datasheet's <1 µA XLP current. For battery operation below 3.0 V, derate the CPU clock from 20 MHz to 8 MHz by selecting the LFINTOSC or HFINTOSC prescaler. Estimated: with VDD=3.3V, FVR off, ADC off, and 16 MHz internal oscillator the active current is roughly 1.5 mA, dropping to <1 µA in Sleep with WDT disabled.
Place the 20 MHz external crystal/cap load circuit within 5 mm of the OSC1/OSC2 pins (RA7/RA6). Keep the ICSP lines ICSPDAT (pin 1, multiplexed with RA0) and ICSPCLK (pin 2, multiplexed with RA1) free of series resistors above 100 Ω to ensure reliable in-circuit programming. A 10 kΩ pull-up on MCLR/RA3 (pin 4) is mandatory for proper reset behavior; add a 100 nF cap on MCLR for noise immunity. The SOIC-20 thermal pad is not present; route two VDD and VSS traces side-by-side for low-impedance power delivery.
Do not confuse the PIC16F1509-I/SO (industrial, -40 to +85 °C) with the PIC16F1509-E/SO (extended, -40 to +125 °C) or PIC16LF1509-I/SO (low-voltage F-version, 1.8 V to 3.6 V). Always check the suffix letter after the temperature designator. When migrating code from PIC16F88/F88A/F819 legacy devices, the configuration bits and ADC configuration registers differ - use the MPLAB Code Configurator (MCC) to regenerate initialization. The 14 KB flash is 8K x 14-bit words; C pointers therefore treat program memory as 14-bit wide, not 8-bit.
For designs that use the ADC above 100 ksamples/s, add a small RC anti-aliasing filter (1 kΩ + 100 pF) at each analog input; the SOIC-20 pin capacitance (~5 pF) and the on-chip ADC sample-and-hold (~5 pF) form an unintended divider at high frequencies. Route analog and digital traces on separate layers or with at least 3 mm separation. The internal 16 MHz oscillator accuracy is ±1% factory calibrated; for UART communication at 115200 baud or higher, verify the actual baud error against the receiver tolerance window (typically ±2% for 8N1 asynchronous).
Compliance Information
RoHS and REACH compliant per Microchip product page. Lead-free finish. Not AEC-Q100 qualified - select PIC16F1509-E/SO for extended temperature or PIC16F1509 automotive-grade Q parts for AEC-Q100 requirements.
