PIC12F1571-E/SN - 8-bit MCU, 32MHz, 1.75KB Flash, 3x16-bit PWM | Microchip
MPN: PIC12F1571-E/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.99 | $0.99 |
| 10 | $0.92 | $9.20 |
| 100 | $0.85 | $85.00 |
| 500 | $0.78 | $390.00 |
| 1,000 | $0.72 | $720.00 |
| 3,000 | $0.65 | $1,950.00 |
PIC12F1571-E/SN Overview
A PIC microcontroller (Peripheral Interface Controller) is an 8-bit Harvard-architecture RISC MCU from Microchip that executes one instruction per clock cycle with a small instruction set optimized for embedded control. The PIC12F1571 belongs to the enhanced mid-range PIC12 family that combines 16-bit PWM peripherals with analog peripherals and occupies the entry-level tier of Microchip's 8-bit MCU portfolio (PIC10 -> PIC12 -> PIC16 -> PIC18 hierarchy).
Key differentiating features include three independent 16-bit PWMs with independent timers enabling high-resolution applications such as LED lighting, stepper motor control, and switch-mode power supplies. Additional features include a 10-bit ADC with up to 4 channels, a 5-bit DAC, two comparators, a Complementary Waveform Generator (CWG), and on-chip nonvolatile data storage (EEPROM emulation). Brown-out Reset, Power-on Reset, and a Watchdog Timer ensure robust operation in noisy or unattended environments.
The PIC12F1571-E/SN uses an enhanced mid-range 8-bit core with a 14-bit instruction word and a 2-stage pipeline, delivering 32MHz (8 MIPS) performance. The internal 32MHz oscillator eliminates the need for an external crystal in many designs, reducing BOM cost. The device's PWM timer architecture supports edge-aligned and center-aligned modes with independent period and duty-cycle registers, making it well-suited to digitally controlled lighting and motor drive applications.
Typical applications include LED lighting color-mixing drivers, DC-DC converter control loops, brushed and stepper motor control, battery chargers, and compact IoT sensor nodes that benefit from PWM-driven signal chains combined with on-chip analog feedback.
When designing with this MCU, ensure the VDD decoupling capacitor is placed within 3mm of the VDD pin and the MCLR reset pin is pulled up through a 10k resistor if external reset is not used. Note that the E suffix denotes the -40C to +125C extended temperature grade suitable for industrial environments.
This page synthesizes distributor pricing, drop-in alternatives including temperature-grade and package variants, and practical design considerations not found in the standalone manufacturer datasheet, optimized for engineers evaluating PIC12F1571 for embedded control designs.
Drop-in alternatives for PIC12F1571-E/SN — 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 PIC12F1571-E/SN (same form factor and footprint) — differing in Package, Maximum CPU Speed, Core Architecture, Internal Oscillator, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12F1571-I/SN
✅ Drop-In✓ In Stock
$0.6549 / Unit
View Datasheet →PIC12F1571T-I/SN
✅ Drop-In✓ In Stock
$0.71 / Unit
View Datasheet →PIC12F1571-E/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.84 / Unit
View Datasheet →PIC12F1571-I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.74 / Unit
View Datasheet →PIC12F1501-E/SN
✅ Drop-In✓ In Stock
$0.58 / Unit
View Datasheet →PIC12F1571-E/SN Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit enhanced mid-range |
| Core Size | 8-bit |
| Instruction Word | 14-bit |
| Maximum Clock Frequency | 32 MHz |
| Program Memory Size | 1.75 KB (1K x 14) Flash |
| RAM | 128 bytes |
| Number of I/O Pins | 6 |
| Supply Voltage (VDD) | 1.8 V to 5.5 V |
| PWM Modules | 3 x 16-bit independent |
| ADC | 10-bit, up to 4 channels |
| DAC | 5-bit |
| Comparators | 2 |
| Operating Temperature | -40 C to +125 C (E suffix, extended) |
| Package | 8-pin SOIC (SN), 3.90 mm body width |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | 1 (unlimited) |
| Lead-Free | Yes |
PIC12F1571-E/SN Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8V to 5.5V) |
| Pin 2 | RA5 — Bidirectional I/O pin; ICSPCLK |
| Pin 3 | RA4 — Bidirectional I/O pin; also ADC channel |
| Pin 4 | RA3/MCLR/VPP — Input only; Master Clear reset (active low) or programming voltage |
| Pin 5 | RA2 — Bidirectional I/O pin; analog input |
| Pin 6 | RA1 — Bidirectional I/O pin; ICSPDAT |
| Pin 7 | RA0 — Bidirectional I/O pin |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12F1571-E/SN is suitable for 6 applications: RGB LED Lighting Color-Mixing Driver, Stepper Motor Driver Control Loop, DC-DC Converter Digital Control, Battery-Powered IoT Sensor Node, Cap-Touch User Interface Replacement, Smart Battery Charger Controller.
RGB LED Lighting Color-Mixing Driver
The PIC12F1571-E/SN's three independent 16-bit PWMs make it ideal for RGB LED color-mixing drivers where each color channel requires high-resolution duty-cycle control. The 16-bit resolution enables 65,536 brightness steps per channel, smooth dimming without visible stepping, and precise color temperature control for architectural and stage lighting. With 32MHz internal oscillator and 8 MIPS performance, the MCU executes dimming curves, color-space conversions, and thermal-foldback algorithms in real time. The 10-bit ADC reads an external NTC thermistor for LED junction-temperature compensation, while the 5-bit DAC provides an analog reference for current-loop setpoints. Only 6 I/O pins are needed for three PWM channels plus UART/I2C for DMX or DALI control, fitting comfortably in the SOIC-8 footprint.
Recommended
Stepper Motor Driver Control Loop
The PIC12F1571-E/SN's three 16-bit PWMs are well-suited for stepper motor commutation in micro-stepping applications, where one MCU can drive two H-bridges with smooth sinusoidal current profiling. The Complementary Waveform Generator (CWG) generates dead-time-protected complementary PWM pairs essential for half-bridge FET drivers, reducing peripheral CPU overhead. With 32MHz operation, the device can compute step profiles, ramp-up profiles, and stall-detection algorithms in software without timing jitter. The 10-bit ADC samples motor current via shunt resistors at high PWM rates, while the comparator triggers overcurrent protection in hardware. This combination delivers a compact 8-pin control solution for 2-phase bipolar stepper motors used in 3D printers, camera focus rings, and small robotics.
Recommended
DC-DC Converter Digital Control
The PIC12F1571-E/SN serves as a low-cost digital controller for small DC-DC converters, using its 16-bit PWM to drive a power-MOSFET gate via a gate driver. The 32MHz core executes voltage-mode control loops at switching frequencies up to 250 kHz, while the 10-bit ADC samples the output voltage through a resistor divider for closed-loop regulation. The 5-bit DAC provides a programmable reference voltage, eliminating the need for an external TL431 shunt reference in low-cost designs. Soft-start, overcurrent protection via the on-chip comparator, and undervoltage lockout via brown-out reset are all handled in firmware. The SOIC-8 footprint fits into compact point-of-load regulator modules.
Recommended
Battery-Powered IoT Sensor Node
The PIC12F1571-E/SN's 1.8V to 5.5V operating range and low-power sleep modes suit it for battery-powered IoT sensor nodes where direct connection to a single-cell Li-ion or 2x AA batteries is required. The internal 32MHz oscillator eliminates the external crystal, saving board space and reducing sleep-mode quiescent current by removing oscillator active current. The MCU wakes on interrupt, samples a sensor via the 10-bit ADC, transmits via UART or PWM-based IR, and returns to sleep. With 1.75KB Flash, the device comfortably fits typical small-node firmware including sensor libraries and wireless protocol stacks. The 8-pin SOIC footprint enables the entire node to fit on a 10x10 mm PCB.
Recommended
Cap-Touch User Interface Replacement
The PIC12F1571-E/SN's on-chip comparator and 10-bit ADC enable capacitive touch sensing on up to 6 I/O pins using Microchip's mTouch firmware library, replacing mechanical buttons and slider switches in appliance user interfaces. The 5-bit DAC provides an adjustable threshold voltage for reliable touch detection across varying humidity and temperature conditions. PWM outputs can simultaneously drive LED indicators and backlight brightness, eliminating the need for a separate LED driver IC. The extended -40C to +125C temperature grade ensures reliable touch operation in automotive and industrial environments where consumer-grade touch ICs would fail.
Recommended
Smart Battery Charger Controller
The PIC12F1571-E/SN's 16-bit PWM drives a synchronous buck charger topology for single-cell Li-ion and LiFePO4 battery packs, with the 10-bit ADC monitoring battery voltage, charge current, and cell temperature through a thermistor. The comparator provides hardware-based overcurrent protection independent of firmware latency, while the 5-bit DAC programs the charge-current reference. With 1.75KB Flash, the MCU implements CC/CV charging profiles, temperature-qualified charge termination, and optional LED status indication via PWM dimming. The extended temperature grade makes the device suitable for outdoor solar battery chargers and electric bicycle battery management.
Recommended
Recommended Products Summary
Engineering reference data for PIC12F1571-E/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F1571-I/SN | PIC12F1571T-I/SN | PIC12F1571-E/P | PIC12F1501-E/SN |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-8 (SN) | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Core / Max Clock | PIC 8-bit / 32 MHz | PIC 8-bit / 32 MHz | PIC 8-bit / 32 MHz | PIC 8-bit / 32 MHz | PIC 8-bit / 20 MHz |
| Flash / RAM | 1.75 KB / 128 B | 1.75 KB / 128 B | 1.75 KB / 128 B | 1.75 KB / 128 B | 1.75 KB / 128 B |
| PWM Channels / Resolution | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 2 x 10-bit (-67% channels, -38% resolution) |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) |
| CWG (Complementary Waveform Generator) | Yes | Yes | Yes | Yes | No |
| I/O Pins | 6 | 6 | 6 | 6 | 6 |
| Unit Price (qty 1) | $0.99 | $0.92 | $0.94 | $1.05 | $0.84 |
Key Differentiators
- Three independent 16-bit PWMs versus PIC12F1501's two 10-bit PWMs (vs PIC12F1501-E/SN)
- Complementary Waveform Generator (CWG) for half-bridge drive (vs PIC12F1501-E/SN)
- Extended -40C to +125C temperature grade versus PIC12F1571-I/SN industrial grade (vs PIC12F1571-I/SN)
Design Notes
Place a 0.1 uF decoupling capacitor within 3 mm of the VDD pin (pin 1) and a bulk 10 uF electrolytic or tantalum capacitor near the MCU power entry point. For battery-powered designs, the PIC12F1571's low-power sleep modes can reduce quiescent current to less than 50 nA, but only when the on-chip ADC, comparators, and PWM modules are explicitly disabled before entering sleep. Always verify the brown-out reset voltage threshold is set above the minimum VDD required for stable Flash write operations.
Route the MCLR/RA3 pin (pin 4) directly to either VDD through a 10 kOhm pull-up resistor or to a dedicated reset supervisor IC. Avoid long traces on MCLR to prevent false reset events from EMI coupling. When using ICSP (In-Circuit Serial Programming), keep the ICSPCLK (RA5) and ICSPDAT (RA1) traces short and isolated from PWM-driven signals that could couple noise into programming operations.
Do not exceed VDD of 5.5V; the PIC12F1571 is not 5V tolerant on I/O when VDD is below 4.5V. When migrating from PIC12F1501 firmware, note that the PIC12F1571's PWM timers are 16-bit with different register names (PWM1CON, PWM2CON, PWM3CON) versus the PIC12F1501's 10-bit PWMxDC registers. Existing PIC12F1501 code will require register-level adaptation, not just recompilation. The PIC12F1571 also has only 6 I/O pins - if your design needs 7+, migrate to PIC12F1572 (8 pins) instead.
Compliance Information
RoHS and lead-free compliance per Microchip product page. Not AEC-Q100 qualified - choose PIC16F or dsPIC families for AEC-Q100 automotive designs.
