PIC16F1509T-I/ML - 20MHz 8-bit XLP MCU, 14KB Flash, QFN-20
MPN: PIC16F1509T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.49 | $14.90 |
| 100 | $1.31 | $131.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC16F1509T-I/ML Overview
What is a PIC microcontroller? A PIC (Peripheral Interface Controller) is a family of Harvard-architecture 8-bit microcontrollers from Microchip Technology that combine a CPU core, Flash program memory, SRAM, and on-chip peripherals (ADC, timers, PWM, communication modules) into a single IC. PIC MCUs form the entry tier of Microchip's microcontroller portfolio, sitting beneath the 16-bit dsPIC and 32-bit PIC32 families, and they target cost-sensitive embedded applications where deterministic 8-bit processing is sufficient.
Key features of the PIC16F1509 include 12 I/O pins, a 10-bit ADC with up to 12 channels, enhanced PWM modules with complementary outputs, configurable logic cells (CLC), numerically controlled oscillator (NCO), and the eXtreme Low Power (XLP) technology suite that delivers sub-uA sleep currents. The device operates from 2.5 V to 5.5 V and supports in-circuit serial programming (ICSP) plus in-circuit debugging via Microchip's MPLAB Snap, PICkit, or ICD tools.
Architecturally, the PIC16F1509 uses a RISC-based 8-bit core with a single-cycle instruction set and a 14-bit-wide instruction word, achieving 0.2 us instruction cycle time at 20 MHz. The integrated peripherals are mapped to dedicated peripheral pin-select (PPS) registers, allowing flexible signal routing without PCB rework. Zero Cross Detect (ZCD) and complementary waveform generator (CWG) blocks simplify TRIAC and power-converter control.
Typical applications include LED lighting controllers, TRIAC-based dimmer circuits, small motor control, battery-powered sensor nodes, white-goods user interfaces, and consumer appliance control panels where low cost, low quiescent current, and a compact QFN footprint are critical design drivers.
When designing with this part, route the exposed pad (EP) to a continuous ground plane for thermal dissipation and electrical grounding; missing EP soldering is a leading cause of QFN reliability failures. Decouple VDD with a 100 nF ceramic capacitor placed within 3 mm of the supply pin.
This page synthesizes distributor pricing, drop-in same-family alternatives, comparison parameters, and practical QFN layout guidance not bundled in the manufacturer datasheet.
Drop-in alternatives for PIC16F1509T-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 PIC16F1509T-I/ML (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Program Memory (Flash), I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1509-I/ML
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1509T-I/GZ
✅ Drop-In✓ In Stock
$0.97 / Unit
View Datasheet →PIC16F1509-I/P
✅ Drop-In✓ In Stock
$1.43 / Unit
View Datasheet →PIC16F1509-I/SO
✅ Drop-In✓ In Stock
$1.34 / Unit
View Datasheet →PIC16F1508-I/SO
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16LF1509-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1509T-I/ML Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Instruction Set Architecture | 14-bit Harvard (8-bit data path) |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| RAM | 512 B |
| EEPROM | 0 B (Flash Data EEPROM emulation) |
| Maximum CPU Frequency | 20 MHz |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| I/O Pins | 12 |
| ADC | 10-bit, up to 12 channels |
| PWM Modules | 4 (10-bit) with complementary outputs |
| Timers | 4 (8-bit Timer0/2, 16-bit Timer1/3) |
| Communication | EUSART, I2C, SPI |
| Special Peripherals | CLC, NCO, ZCD, CWG, DAC, Temp Sensor |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 20-pin QFN (4x4 mm) with Exposed Pad |
| Package Designator | ML (QFN-20) |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Programming/Debug | ICSP, ICD via MPLAB Snap/PICkit/ICD |
PIC16F1509T-I/ML Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O / CWG1B output |
| Pin 2 | RA4 — Bidirectional I/O |
| Pin 3 | RA3/MCLR/VPP — I/O, Master Clear reset (active-low) or ICSP programming voltage |
| Pin 4 | RC5 — Bidirectional I/O |
| Pin 5 | RC4 — Bidirectional I/O |
| Pin 6 | RC3 — Bidirectional I/O / SCL I2C |
| Pin 7 | RC2 — Bidirectional I/O |
| Pin 8 | RC1 — Bidirectional I/O |
| Pin 9 | RC0 — Bidirectional I/O |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RA2 — Bidirectional I/O / analog input |
| Pin 12 | RA1 — Bidirectional I/O / ICSPCLK |
| Pin 13 | RA0 — Bidirectional I/O / ICSPDAT |
| Pin 14 | VDD — Positive supply 2.5 V to 5.5 V |
| Pin 15 | RC7 — Bidirectional I/O / USART RX |
| Pin 16 | RC6 — Bidirectional I/O / USART TX |
| Pin 17 | RB7 — Bidirectional I/O |
| Pin 18 | RB6 — Bidirectional I/O |
| Pin 19 | RB5 — Bidirectional I/O |
| Pin 20 | RB4 — Bidirectional I/O |
Typical Applications
PIC16F1509T-I/ML is suitable for 6 applications: TRIAC-Based AC Dimmer Control, Battery-Powered IoT Sensor Node, White-Goods User Interface Controller, Small DC Motor Control with PWM, LED Lighting Controller, Consumer Appliance Control Board.
TRIAC-Based AC Dimmer Control
The PIC16F1509T-I/ML's integrated Zero Cross Detect (ZCD) peripheral and Complementary Waveform Generator (CWG) directly drive trailing-edge TRIAC dimmers without external zero-cross optocouplers. The ZCD senses the AC mains zero-cross event on a dedicated pin, while the CWG generates the anti-phase PWM gate pulse that the MCU fires on the TRIAC. At 20 MHz the 50 ns instruction cycle provides sub-100 us phase-angle resolution, enabling smooth dimming curves. The device's 14 KB Flash holds the dimming algorithm, soft-start ramp, and push-button debounce state machine in one firmware image. Operates from a small capacitive dropper supply directly on the 230 V AC line.
Recommended
Battery-Powered IoT Sensor Node
The PIC16F1509T-I/ML's XLP (eXtreme Low Power) technology delivers sub-uA sleep currents, making it ideal for coin-cell sensor nodes that must operate for years on a single CR2032 battery. The 10-bit ADC with internal FVR reference measures temperature, light, or battery voltage without external components. The eUSART wakes the MCU from sleep on incoming sensor data, while the 14 KB Flash holds a full Bluetooth Low Energy beaconing stack via a companion module. Industrial -40C to +85C operation supports outdoor and industrial IoT deployments.
Recommended
White-Goods User Interface Controller
In washing machines, dishwashers, and microwave ovens, the PIC16F1509T-I/ML serves as the user-interface microcontroller driving 7-segment displays, button matrices, and buzzer indicators. The 12 I/O pins comfortably handle the matrix-scan keypad, LED row drivers, and rotary-encoder input without external logic. The CWG peripheral generates the backlight PWM without timer intervention, freeing the CPU for menu state machines stored in the 14 KB Flash. The QFN-20 (4x4) footprint fits inside tight appliance control-panel enclosures.
Recommended
Small DC Motor Control with PWM
The PIC16F1509T-I/ML drives small brushed DC motors and fans through its 10-bit PWM modules with complementary outputs and programmable dead-band control. The 20 MHz CPU closes a PID speed-control loop in well under 1 ms by sampling the ADC tachometer input and adjusting the PWM duty. With 14 KB Flash the firmware can store multiple motor profiles and acceleration curves, while the QFN-20 (4x4) package keeps the controller footprint smaller than a SOIC-28 alternative.
Recommended
LED Lighting Controller
For architectural and stage lighting, the PIC16F1509T-I/ML generates multi-channel DMX-512 lighting control via its EUSART, while its PWM modules mix RGB LED dimming curves with 10-bit resolution per channel. The 14 KB Flash stores lighting scenes, fade tables, and DMX address-dip-switch state. The XLP sleep mode keeps idle fixtures below 5 uA standby current, important for permanently-installed architectural fixtures. The 20-pin QFN (4x4 mm) exposes sufficient I/O for four independent LED driver channels.
Recommended
Consumer Appliance Control Board
The PIC16F1509T-I/ML anchors low-cost consumer appliances such as coffee makers, air purifiers, and rice cookers, where 14 KB Flash covers the full state-machine firmware and 512 B RAM handles sensor buffers. The CLC (Configurable Logic Cell) peripheral combines timer and input signals in hardware without CPU intervention, simplifying safety-interlock logic. The industrial -40C to +85C temperature range supports under-cabinet kitchen environments, while the small QFN-20 (4x4) footprint fits into compact appliance enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1509T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1509-I/ML | PIC16F1509T-I/GZ | PIC16F1509-I/P | PIC16F1508-I/SO | PIC16LF1509-I/ML |
|---|---|---|---|---|---|---|
| Package | 20-QFN (4x4 mm) | 20-QFN (4x4 mm) - identical | 20-QFN (4x4 mm) - identical | 20-QFN (4x4 mm) - identical | 20-QFN (4x4 mm) - identical | 20-QFN (4x4 mm) - identical |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 14 KB | 14 KB | 14 KB | 14 KB | 7 KB (-50%) | 14 KB |
| SRAM | 512 B | 512 B | 512 B | 512 B | 256 B (-50%) | 512 B |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage (VDD) | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 1.8 V to 3.6 V (lower VDD range) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| ADC | 10-bit, 12 channels | 10-bit, 12 channels | 10-bit, 12 channels | 10-bit, 12 channels | 10-bit, 12 channels | 10-bit, 12 channels |
| Special Peripherals | CLC, NCO, ZCD, CWG, DAC, Temp Sensor | Same set | Same set | Same set | Same set (less memory) | Same set |
Key Differentiators
- Integrated Zero Cross Detect (ZCD) and Complementary Waveform Generator (CWG) peripherals (vs PIC16F1455/1459 family)
- 14 KB Flash and 512 B RAM in the smallest 20-pin QFN (4x4) (vs PIC16F1508-I/SO)
- eXtreme Low Power (XLP) technology with sub-uA sleep current (vs PIC16F1459-I/SS)
Design Notes
The PIC16F1509T-I/ML's exposed thermal pad (EP) on the QFN-20 (4x4) package MUST be soldered to a ground-plane land pattern for mechanical reliability, thermal dissipation, and electrical grounding. Per IPC-7351 land-pattern guidelines, the central EP pad should be a single contiguous plane approximately 2.5 mm x 2.5 mm with multiple thermal vias to the inner ground plane. Missing EP soldering is the leading cause of field failures on QFN-packaged PIC MCUs, causing intermittent reset and JTAG failures under thermal stress.
Place a 100 nF X7R 0402 ceramic decoupling capacitor within 3 mm of the VDD pin (pin 14) and a 10 uF bulk capacitor at the board's MCU supply entry. For battery-powered applications, the MCP1700 3.3 V LDO with sub-uA quiescent current pairs well with the XLP sleep mode of the PIC16F1509. For AC-line-powered TRIAC dimmer applications, use a capacitive dropper supply with a TVS clamp and series resistance rather than a transformer - the MCU's 2.5 V minimum VDD tolerates low-capacitance dropper designs.
Route the ICSP signals (ICSPCLK on RA1, ICSPDAT on RA0) directly to a 5-pin header on the board edge for in-circuit programming and debugging via MPLAB Snap or PICkit 4. Add a 10 kohm pull-up on MCLR (pin 3) and keep the trace short to avoid spurious resets. Route the analog ADC inputs away from PWM and TRIAC-switching traces, and add a 100 nF guard capacitor at each ADC pin to filter switching noise.
Do not leave configuration words at default values - explicitly set the FOSC, BOR, and WDT bits in MPLAB X before code generation. The PIC16F1509T-I/ML's ICSP pins share the RA0/RA1 general-purpose I/O pins; if your firmware reconfigures these pins as outputs at startup, MPLAB Snap programming will fail until the pins are released through a high-voltage ICSP sequence. Use the LVP (low-voltage programming) configuration bit only if you do not need RA0/RA1 as general I/O, or use HV programming via the MCLR pin.
Compliance Information
RoHS compliant and lead-free per Microchip's environmental compliance declaration. The PIC16F1509T-I/ML is NOT AEC-Q100 qualified - it is the industrial -I grade only (-40C to +85C). For AEC-Q100 qualified automotive PIC16F1509 variants look for the PIC16F1509-E (extended) grade or the PIC16F1509T-I/ML VAO suffix.
