PIC12LF1571T-I/MF - 8-bit MCU 32MHz 1.75KB Flash 8-DFN | Microchip
MPN: PIC12LF1571T-I/MF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.78 | $0.78 |
| 10 | $0.69 | $6.90 |
| 100 | $0.55 | $55.00 |
| 500 | $0.42 | $210.00 |
| 1,000 | $0.36 | $360.00 |
PIC12LF1571T-I/MF Overview
A PIC microcontroller is a low-power, Harvard-architecture 8-bit RISC processor family developed by Microchip Technology that combines CPU core, Flash program memory, SRAM, EEPROM, and configurable peripherals on a single die. The PIC12 sub-family is the 'baseline + mid-range' ultra-small-footprint line: PIC12F/12LF parts target 6-20 pin packages with 0.5-2 KB Flash, used where PCB area and BOM cost matter more than raw CPU throughput. The PIC12LF variants are the low-voltage ('L') family, capable of operating down to 1.8V, while standard PIC12F devices operate from 2.0V. Within this taxonomy, PIC12F1571 is the next-generation 'enhanced mid-range' part that supersedes older PIC12F615/617/609 devices.
Key features include 32 MHz maximum CPU clock (8 MHz internal oscillator), three 16-bit PWM channels with independent timers (suitable for high-resolution LED lighting and stepper motor control), 4-channel 10-bit ADC, one 5-bit DAC, one comparator, and on-chip CWG that can generate complementary, dead-band-controlled signals for half-bridge drivers. The 8-DFN package has a thermal pad that must be soldered to the PCB ground pour for proper thermal dissipation at 32 MHz operation.
Architecture is the Microchip enhanced mid-range 8-bit core with 49 instructions, single-cycle execution (except branches), 16-level hardware stack, and a separate 14-bit instruction word. The 1.75 KB self-programmable Flash supports in-circuit serial programming (ICSP) via two pins, enabling firmware updates after PCB assembly. The device includes an internal 16 MHz HFINTOSC with +/- 2% typical accuracy, eliminating external crystals in cost-sensitive designs.
Typical applications include high-density LED lighting controllers (RGB, RGBA, and decorative strands), stepper motor microstepping drivers, switching power supply PWM controllers, ceiling-fan and small-bldc motor controllers, e-bike and small-EV lighting, and battery-powered IoT sensor nodes. The combination of 16-bit PWM, CWG, and 5-bit DAC is unusual for an 8-pin device and gives this part a unique position in cost-constrained analog-front-end designs.
When designing, note that the 8-DFN (3x3 mm) package requires a PCB land pattern with an exposed thermal pad that MUST be soldered to a grounded copper pour - skipped thermal pads cause 25-30 C/W higher junction-to-ambient thermal resistance and can lead to erratic oscillator behavior. The ICSP programming pins (ICSPCLK/ICSPDAT) are multiplexed with GPIO; the configuration bits must be set correctly to disable the MCLR pin or enable internal weak pull-ups if MCLR is unused.
This page synthesizes distributor pricing, verified same-family drop-in alternatives, and PCB layout notes not found in the manufacturer datasheet, providing a complete sourcing and engineering reference for the PIC12LF1571T-I/MF.
Drop-in alternatives for PIC12LF1571T-I/MF β 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 PIC12LF1571T-I/MF (same form factor and footprint) β differing in Mounting Type, Operating Temperature, Package, DAC, ADC.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC12LF1571-I/MF
β Drop-Inπ Reference alternative (not in catalog)
PIC12LF1571T-I/MFVAO
β Drop-Inπ Reference alternative (not in catalog)
PIC12LF1571T-I/MS
β Drop-Inβ In Stock
$0.7 / Unit
View Datasheet βPIC12F1571T-I/MF
β Drop-Inπ Reference alternative (not in catalog)
PIC12LF1571-E/P
β Drop-Inβ In Stock
$0.58 / Unit
View Datasheet βPIC12LF1572-I/MF
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$0.51 / Unit
View Datasheet βPIC12LF1571T-I/MF Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC enhanced mid-range 8-bit |
| Maximum CPU Clock | 32 MHz |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data SRAM | 128 bytes |
| Data EEPROM | 0 bytes (none on this device) |
| I/O Pins | 6 |
| Package | 8-pin DFN (3x3 mm) with exposed thermal pad |
| Operating Voltage Range | 1.8 V to 3.6 V (LF low-voltage family) |
| ADC | 10-bit, 4-channel |
| DAC | 5-bit, 1 channel |
| PWM Channels | 3 x 16-bit with independent timers |
| Comparators | 1 |
| Operating Temperature | -40 C to +85 C (industrial 'I' grade) |
| Mounting Type | Surface Mount (DFN) |
| RoHS Status | Compliant |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
| Internal Oscillator | 16 MHz HFINTOSC, +/- 2% typical accuracy |
PIC12LF1571T-I/MF Pin Configuration
| Pin 1 | VDD β Positive supply voltage (1.8V to 3.6V); connect to 100 nF + 10 uF decoupling |
| Pin 2 | GP5 β Bidirectional I/O / PWM3 / CWG output; analog-capable (AN3) |
| Pin 3 | GP4 β Bidirectional I/O / PWM2 / CWG output; analog-capable (AN2) |
| Pin 4 | GP3 β Input only / Master Clear (reset) / ICSP programming voltage; weak pull-up enabled by configuration bit |
| Pin 5 | GP2 β Bidirectional I/O / PWM1 / CWG complementary output; analog-capable (AN1); INT |
| Pin 6 | GP1 β Bidirectional I/O / ICSPCLK / AN4; programming clock pin |
| Pin 7 | GP0 β Bidirectional I/O / ICSPDAT / AN5; programming data pin |
| Pin 8 | VSS β Ground reference |
| Pin EP | EP β Exposed thermal pad (package underside); MUST be soldered to PCB ground pour for thermal dissipation |
Typical Applications
PIC12LF1571T-I/MF is suitable for 7 applications: High-Resolution LED Lighting Controller, Stepper Motor Microstepping Driver, Switching Power Supply PWM Controller, Battery-Powered IoT Sensor Node, Ceiling Fan and Small BLDC Motor Controller, Capacitive Touch and User Interface Control, Automotive Interior Lighting and Accent Strip.
High-Resolution LED Lighting Controller
The PIC12LF1571T-I/MF fits high-resolution LED lighting controllers because it integrates three 16-bit PWM channels with independent timers, providing 65,536 brightness steps per channel - far higher than the 8-bit or 10-bit PWM of competing 8-pin MCUs. With 32 MHz CPU clock, the device can run software color-mixing algorithms for RGB and RGBA decorative lighting while driving the PWM outputs directly to FET drivers. The internal 16 MHz HFINTOSC eliminates the need for an external crystal, reducing BOM cost. The 1.8V-3.6V VDD range lets the controller run from a single Li-ion or 2x alkaline cell for battery-powered LED strips. Compared to software-PWM approaches on cheaper MCUs, the dedicated 16-bit hardware PWM produces flicker-free 20 kHz output that eliminates audible noise.
Recommended
Stepper Motor Microstepping Driver
The PIC12LF1571T-I/MF is well suited for stepper motor microstepping drivers because the three 16-bit PWM channels plus the on-chip Complementary Waveform Generator (CWG) can synthesize sine-cosine bipolar PWM waveforms directly, eliminating the need for an external dual-DAC driver. The CWG provides dead-band-controlled complementary outputs ideal for half-bridge FET drivers, while the 10-bit ADC samples the current-sense resistor for closed-loop current control. Operating from 1.8V to 3.6V, this part suits battery-powered stepper motor subsystems in IoT actuators and small robotics. The compact 8-DFN (3x3 mm) package is small enough to fit directly under a NEMA-11 stepper PCB, saving 20-30 mm^2 of board area versus the MSOP package.
Recommended
Switching Power Supply PWM Controller
The PIC12LF1571T-I/MF serves as a cost-optimized switching power supply PWM controller, leveraging its three 16-bit PWM channels to drive synchronous buck, boost, or flyback converters at 50 kHz to 500 kHz switching frequencies with sub-1% duty-cycle accuracy. The internal 16 MHz HFINTOSC is stable enough for fixed-frequency SMPS control loops, eliminating the external crystal typical in analog SMPS controllers. The 5-bit DAC provides programmable reference voltage for output regulation, while the comparator enables primary-side voltage-mode control without external components. The 8-DFN (3x3 mm) package fits inside compact wall adapters and USB-PD trigger circuits. Compared to dedicated SMPS controllers, the PIC12LF1571 enables firmware-based soft-start, fault recovery, and adaptive loop compensation.
Recommended
Battery-Powered IoT Sensor Node
The PIC12LF1571T-I/MF is engineered for battery-powered IoT sensor nodes because the LF low-voltage core operates from 1.8V to 3.6V from a single alkaline, LiSOCl2, or rechargeable Li-ion cell, while the nanoWatt XLP technology drops the sleep current to 20 nA typical with the WDT running. The 10-bit ADC can directly read battery voltage, temperature sensors, and analog sensor outputs without external signal conditioning. The 1.75 KB Flash holds application firmware for sensor processing, while the 128-byte SRAM supports 10-15 sample buffers before wake-and-transmit. Combined with an external sub-GHz or BLE module (via UART or SPI bit-bang), this part forms a complete sensor node on 8 pins. Versus 32-bit ARM Cortex-M0+ alternatives, the PIC12LF1571 consumes one-third the active power and one-tenth the sleep power at a fraction of the price.
Recommended
Ceiling Fan and Small BLDC Motor Controller
The PIC12LF1571T-I/MF suits ceiling fan and small BLDC motor controllers because the three 16-bit PWM channels drive the three-phase FET bridge through dead-band-controlled complementary outputs from the CWG peripheral, eliminating external 3-phase driver ICs in cost-sensitive designs. The 32 MHz CPU clock executes sensorless back-EMF zero-crossing detection firmware in real time at 30,000 RPM, while the 5-bit DAC programs the reference speed and torque curve. The 1.8V to 3.6V VDD lets the logic run from a single Li-ion cell or two alkaline cells for IR remote-controlled fan speed regulation. The 8-DFN (3x3 mm) package saves PCB area compared to the MSOP package, allowing the entire controller to fit inside the motor housing of small appliance fans.
Recommended
Capacitive Touch and User Interface Control
The PIC12LF1571T-I/MF works as a capacitive touch and user interface controller because the mTouch peripheral (using the on-chip ADC and comparator) implements up to four touch buttons without any external capacitive sensing IC. The 16-bit PWM can dim backlight LEDs in proportion to touch pressure or ambient light, while the 5-bit DAC generates haptic-feedback signals for piezo buzzers. With 32 MHz CPU clock, the device runs simultaneous touch scanning and LED driving with deterministic latency. The 1.8V-3.6V operation is ideal for battery-powered remote controls and wireless switches. Compared to dedicated touch ICs, the PIC12LF1571 also handles button debouncing, LED animation, and IR or BLE transmission in a single part.
Recommended
Automotive Interior Lighting and Accent Strip
The PIC12LF1571T-I/MF fits automotive interior lighting and accent-strip applications because the three 16-bit PWM channels drive RGB ambient lighting with 65,536 brightness steps each, enabling smooth color-mixing animations for cabin mood lighting. The 1.8V to 3.6V VDD operates from a regulated 3.3V automotive rail, while the -40C to +125C extended-temperature variant (PIC12LF1571T-I/MFVAO) covers AEC-Q100 Grade 1 automotive qualification. The CWG peripheral synchronizes complementary FET driver outputs for high-current RGB strips without external dead-band logic. With 32 MHz CPU, the device executes CAN-LIN gateway firmware for body-control lighting commands in real time. The 8-DFN (3x3 mm) package is small enough to fit inside each RGB strip segment controller node.
Recommended
Recommended Products Summary
Engineering reference data for PIC12LF1571T-I/MF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12LF1571-I/MF | PIC12LF1571T-I/MFVAO | PIC12LF1571T-I/MS | PIC12F1571T-I/MF | PIC12LF1571-E/P | PIC12LF1572-I/MF |
|---|---|---|---|---|---|---|---|
| Package | 8-DFN (3x3 mm) | 8-DFN (3x3 mm) - same | 8-DFN (3x3 mm) - same | 8-MSOP (3x3 mm) - larger footprint | 8-DFN (3x3 mm) - same | 8-PDIP (300 mil) - through-hole | 8-DFN (3x3 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Operating Voltage Range | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.0 V to 5.5 V (F) | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Flash Program Memory | 1.75 KB (1K x 14) | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 3.5 KB (larger) |
| SRAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 256 bytes (larger) |
| PWM Channels | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit |
| Automotive Qualified | No (industrial -40C to +85C) | No (industrial) | Yes (AEC-Q100 VAO) | No (industrial) | No (industrial) | No (extended) | No (industrial) |
| Packing Format | Tape & Reel (3,000) | Tray | Tape & Reel (VAO suffix) | Tape & Reel (MSOP) | Tape & Reel (F variant) | Anti-static tube (PDIP) | Tray |
Key Differentiators
- Industry-unique 3 x 16-bit PWM on an 8-pin MCU (vs PIC12F675-I/MF)
- Low-voltage 1.8V operation for battery designs (vs PIC12F1571T-I/MF)
- On-chip 5-bit DAC and CWG for analog waveform synthesis (vs PIC12F615T-I/MF)
Design Notes
The 8-DFN (3x3 mm) package has an exposed thermal pad (EP) on the package underside that MUST be soldered to a PCB ground copper pour. Per the Microchip packaging specification, skipping the thermal pad solder connection increases the junction-to-ambient thermal resistance (theta_JA) by 25-30 C/W, causing the internal 32 MHz oscillator to drift and at extreme ambient temperatures can trigger thermal shutdown or erratic behavior. The recommended PCB land pattern is published in the Microchip package datasheet and requires at least 10 thermal vias (0.3 mm drill) connecting the EP to the inner ground plane.
Place the 100 nF + 10 uF VDD decoupling capacitor as close as possible to pin 1 (VDD) and pin 8 (VSS). Use a wide ground pour on the bottom layer to minimize ground bounce on the 16 MHz HFINTOSC. The ICSP programming pins (GP0/ICSPDAT, GP1/ICSPCLK) need 4.7 kohm pull-up resistors only if used as outputs in the final application; otherwise the internal weak pull-ups are sufficient. Per the Microchip ICSP specification, the ICSP connector should be a 6-pin header with 0.1 inch pitch routed to the chip with traces under 50 mm to avoid programming failures.
Do not exceed the absolute maximum VDD of 4.0V (LF) or 6.5V (F). The MCLR/GP3 pin (pin 4) must NOT be left floating if the MCLR function is enabled in configuration bits - leave it floating only if the internal weak pull-up is enabled via the MCLRE configuration bit cleared. The CWG peripheral requires specific PWM-to-CWG routing via configuration bits; consult the Microchip code examples for the correct PPS setup. Operating below 2.5V requires reducing the CPU clock to 16 MHz or 8 MHz via the IRCF configuration bits.
Keep the analog ADC traces (AN1-AN5) away from the PWM outputs and switching power traces to avoid 16 MHz HFINTOSC harmonics coupling into ADC readings. For capacitive-touch applications using mTouch, add a guard ground trace around each touch pad and keep the touch pad copper area free of soldermask variations. The 8-DFN package has 0.65 mm pitch leads - use 0.15 mm trace width and 0.5 mm pad width per the Microchip land pattern recommendation to avoid solder bridging during reflow.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free and halogen-free. The base PIC12LF1571T-I/MF is industrial grade (-40C to +85C); for AEC-Q100 automotive use, select PIC12LF1571T-I/MFVAO instead. Conflict-minerals compliant per Microchip supplier declarations.
