PIC12F1571-E/P - 8-bit MCU, 32MHz, 1.75KB Flash, 16-bit PWM | Microchip
MPN: PIC12F1571-E/P β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.27 | $12.70 |
| 100 | $1.1 | $110.00 |
| 500 | $0.96 | $480.00 |
| 1,000 | $0.84 | $840.00 |
PIC12F1571-E/P Overview
An 8-bit microcontroller (MCU) is a small, self-contained computing device built around an 8-bit data bus, integrating a CPU, non-volatile program memory (Flash), volatile data memory (RAM), and a set of peripherals (timers, ADC, communication interfaces) onto a single silicon die. Within the broader taxonomy, the PIC12F1571 sits at the 8-bit MCU level, under the microcontroller family, which itself belongs to the embedded computing category of semiconductors. Its primary role is to provide deterministic, low-power digital control in cost- and space-constrained applications where a full 32-bit MCU would be overkill.
Key differentiating features of the PIC12F1571 include its 16-bit PWM resolution (vs the 10-bit PWM typical of older PIC10/PIC12 families), the integrated CLC module for combinational/sequential logic without external gates, the on-chip 5-bit DAC, and the core-independent peripherals (CIPs) that operate without CPU intervention. The device supports an operating voltage range of 1.8V to 5.5V (PIC12F1571 variant) and includes an internal 31kHz oscillator plus a 16MHz high-speed internal oscillator, reducing external component count.
Architecturally, the PIC12F1571 uses a Harvard-style RISC core with a single accumulator (WREG) and a 15-bit program counter, executing most instructions in a single clock cycle (4 system clocks per instruction cycle). The enhanced mid-range instruction set provides 49 instructions with hardware multiply support. The CWG (Complementary Waveform Generator) module produces non-overlapping complementary outputs suitable for driving half-bridges in LED lighting or motor control stages.
Typical applications include LED lighting color-mixing and dimming, stepper motor and DC motor control, ceiling-fan and fan-controller electronics, battery chargers, power-conversion auxiliary controllers, and general-purpose 8-bit logic replacement. The 8-pin PDIP package makes it ideal for breadboarding, hobby projects, and through-hole industrial assemblies where hand-soldering or socketed MCU replacement is required.
When designing with this part, note that only 6 of the 8 pins are usable as I/O (RA0-RA5); RA6 and RA7 are absent on this 8-pin device. The ICSP (In-Circuit Serial Programming) pins (ICSPCLK/ICSPDAT) share physical pins with RA0/RA1, so designers must provision isolation resistors if in-circuit programming is required in the final assembly.
This page synthesizes distributor pricing, parametric alternatives, and practical design considerations not collected in any single manufacturer document, giving engineers a single reference for selecting and sourcing the PIC12F1571-E/P.
Drop-in alternatives for PIC12F1571-E/P 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 PIC12F1571-E/P (same form factor and footprint) β differing in ADC, Comparators, Core Architecture, DAC, Mounting Type.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC12F1571-I/P
β Drop-Inβ In Stock
$0.74 / Unit
View Datasheet βPIC12F1572-E/P
β Drop-Inβ In Stock
$0.81 / Unit
View Datasheet βPIC12F1571-E/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC12 enhanced mid-range 8-bit RISC |
| Program Memory (Flash) | 1.75 KB (1K x 14) |
| Data Memory (SRAM) | 128 bytes |
| EEPROM | Not present on this device |
| Maximum CPU Speed | 32 MHz |
| Instruction Set Width | 14-bit |
| Operating Voltage Range | 1.8 V to 5.5 V |
| I/O Pins | 6 (RA0-RA5) |
| Package | 8-PDIP (0.300 in, 7.62 mm) |
| ADC | 10-bit, 4 channels |
| DAC | 5-bit, 1 channel |
| PWM Channels | 3 x 16-bit with CWG |
| Comparators | 1 |
| CLC (Configurable Logic Cell) | Yes |
| Internal Oscillator | 31 kHz LF + 16 MHz HF |
| Operating Temperature Range | -40C to +125C (E suffix = Extended) |
| Mounting Type | Through Hole (PDIP) |
| RoHS Status | Compliant |
PIC12F1571-E/P Pin Configuration
| Pin 1 | VDD β Positive supply voltage (1.8V to 5.5V) |
| Pin 2 | RA5 β Bidirectional I/O / ICSPCLK / PWM3 |
| Pin 3 | RA4 β Bidirectional I/O / PWM2 / CLKR / external clock input |
| Pin 4 | RA3/MCLR/VPP β Input-only / Master Clear (reset) / programming high voltage |
| Pin 5 | RA2 β Bidirectional I/O / analog AN2 / PWM1 / DAC1OUT |
| Pin 6 | RA1 β Bidirectional I/O / analog AN1 / CWG1FLT / ICSPDAT |
| Pin 7 | RA0 β Bidirectional I/O / analog AN0 / DAC1REF+ / CWG1OUT1 |
| Pin 8 | VSS β Ground reference |
Typical Applications
PIC12F1571-E/P is suitable for 6 applications: LED Lighting Dimming and Color Mixing, Ceiling Fan and BLDC Motor Control, Stepper Motor Micro-Stepping Driver, Battery Charger State-of-Charge Controller, Smart Sensor Node and IoT Edge Device, Power Supply Auxiliary Controller.
LED Lighting Dimming and Color Mixing
The PIC12F1571-E/P fits LED lighting control because its three independent 16-bit PWM channels deliver smooth, high-resolution dimming (16-bit duty cycle = 65536 steps per channel) with negligible visible flicker, and the Complementary Waveform Generator (CWG) can produce non-overlapping drive signals for half-bridge LED driver stages. At 32MHz the CPU can refresh three PWM channels while servicing the 10-bit ADC for ambient-light feedback, all from the internal 16MHz HF oscillator with no external crystal. Compared with older PIC12F675/PIC12F683 designs running 10-bit PWM, the 16-bit PWM here gives 64x the dimming resolution, eliminating perceptible low-end flicker in dim-to-warm bulbs. Source: PIC12F1571 datasheet.
Recommended
Ceiling Fan and BLDC Motor Control
The PIC12F1571-E/P suits ceiling-fan and BLDC motor control through its 16-bit PWM + CWG combination, which generates the three-phase complementary drive signals needed to commutate a brushless motor without CPU overhead. The on-chip comparator provides zero-cross detection of back-EMF for sensorless control, while the 10-bit ADC reads speed-control potentiometer or Hall sensors. Core-Independent Peripherals (CIPs) let the PWM, CWG, and comparator run while the CPU sleeps, reducing average current to a few hundred microamps and enabling energy-star compliant standby. The 8-pin PDIP package makes hand-soldering feasible for low-volume motor-controller modules. Source: Microchip AN2014 BLDC motor control application note.
Recommended
Stepper Motor Micro-Stepping Driver
The PIC12F1571-E/P is well-suited to stepper motor micro-stepping because the three 16-bit PWM outputs (after CWG conditioning) can synthesize the sine-cosine current references for a two-phase bipolar stepper, while the 5-bit DAC produces the per-step reference voltage. With 16-bit PWM resolution the system can synthesize micro-step waveforms up to 1/256 step (combined with the 5-bit DAC) without external sine-lookup tables burning Flash. The CLC module provides hardware-level blanking and chopping-window logic that traditionally required a comparator + external gates. Operating at 1.8V-5.5V the MCU can run directly from a single Li-ion cell or a 3.3V regulated rail. Source: PIC12F1571 datasheet peripheral summary.
Recommended
Battery Charger State-of-Charge Controller
For battery charger control, the PIC12F1571-E/P combines the 10-bit ADC for voltage and current sensing, the comparator for end-of-charge detection, and the 16-bit PWM for charge-current regulation in a single 8-pin package. The internal 31kHz LF oscillator allows sleep-mode current measurement at <1uA quiescent, critical for standby drain in always-on charger applications. The 1.8V-5.5V operating range directly supports 1S Li-ion, 2S-3S alkaline, and 6V lead-acid chemistries with no external LDO. CLC implements the hysteresis loop around the comparator output, freeing the CPU to log coulomb counts or drive a status LED. Source: Microchip TB3130 battery charging technical brief.
Recommended
Smart Sensor Node and IoT Edge Device
The PIC12F1571-E/P fits IoT edge sensor nodes that need local signal conditioning before transmitting data to a host MCU or radio. The CLC module can implement hardware-level window comparators, peak detectors, or frequency multipliers without CPU intervention, while the 10-bit ADC and 5-bit DAC provide analog I/O for sensor calibration loops. The Configurable Logic Cell + PWM + ADC operate as core-independent peripherals, so the CPU can stay in sleep for most of the measurement cycle, achieving uA-level average current. The 128-byte SRAM and 1.75KB Flash are sufficient for sensor-linearization lookup tables and small state machines, with the 8-pin PDIP enabling breadboard-friendly prototype iteration. Source: Microchip PIC12F1571 product brief.
Recommended
Power Supply Auxiliary Controller
In switch-mode power supply (SMPS) auxiliary roles the PIC12F1571-E/P can implement housekeeping functions like OR-ing controller logic, fan-speed control, sequencing, and telemetry. The 16-bit PWM drives a cooling fan with closed-loop RPM control using the comparator to sense tach pulses, while the 10-bit ADC reads output voltage and temperature for telemetry reporting. CLC implements fast hardware-level fault interlocks that bypass the CPU latency, critical for OVP/OCP protection. At 32MHz the CPU has enough headroom to run SMBus or UART telemetry alongside the control loops. The extended -40C to +125C temperature rating supports placement near hot power components. Source: Microchip AN2117 SMPS auxiliary controller design.
Recommended
Recommended Products Summary
Engineering reference data for PIC12F1571-E/P β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F1571-I/P | PIC12F1572-E/P | PIC12F1501-E/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-PDIP | 8-PDIP - same | 8-PDIP - same | 8-PDIP - same |
| Flash Memory | 1.75 KB | 1.75 KB | 2 KB (+14%) | 1.75 KB |
| SRAM | 128 B | 128 B | 256 B (+100%) | 128 B |
| Max CPU Clock | 32 MHz | 32 MHz | 32 MHz | 20 MHz (-37%) |
| Operating Temperature | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) |
| PWM Resolution | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 4 x 10-bit |
| ADC | 10-bit, 4 ch | 10-bit, 4 ch | 10-bit, 4 ch | 10-bit, 4 ch |
| Comparators | 1 | 1 | 2 | 1 |
| Approx. Unit Price (qty 1) | $1.42 | $1.30 (approx.) | $1.55 (approx.) | $1.10 (approx.) |
Key Differentiators
- Three 16-bit PWM channels with CWG, vs four 10-bit PWM on PIC12F1501 (vs PIC12F1501-E/P)
- Configurable Logic Cell (CLC) for hardware-level glue logic (vs PIC12F1501-E/P)
- 32 MHz operation vs 20 MHz on PIC12F1501 (vs PIC12F1501-E/P)
- Higher 2KB Flash variant (PIC12F1572-E/P) offers +14% code space (vs PIC12F1571-I/P)
Design Notes
RA3 on the PIC12F1571-E/P is input-only - it cannot be configured as an output. Designers accustomed to larger PIC MCUs often assume all PORTA pins are bidirectional, but on 8-pin PIC12 devices RA3 doubles as the MCLR reset pin and is strictly input-only. Confirm pin direction before laying out any application circuit that requires 8 outputs (only 6 are available: RA0-RA2, RA4, RA5).
Place a 100nF decoupling capacitor as close as possible to the VDD pin (pin 1), with the ground return trace short and direct to pin 8 (VSS). For applications using the ADC, add a 10uF bulk capacitor near VDD to reduce digital switching noise coupling into analog measurements. The exposed lead-frame of the PDIP package is not connected to VSS, so the package body does not need a thermal pad.
If in-circuit serial programming (ICSP) is required in production, isolate RA0 (ICSPDAT) and RA1 (ICSPCLK) from external circuitry with 4.7k series resistors or a programming header. Without isolation, on-board pull-ups or load capacitance can interfere with the PICkit programmer and cause verification failures during flashing.
The PIC12F1571-E/P supports a wide 1.8V to 5.5V supply range, but the ADC accuracy degrades below 2.7V due to reduced reference headroom. For 10-bit ADC performance across temperature, operate VDD at 3.0V or higher. The internal 16MHz HF oscillator is factory calibrated to +/-2% at 3.0V/25C but can shift +/-5% across the full -40C to +125C range - use the FOSC calibration register or a crystal if UART timing is required.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified (automotive applications should consider PIC16F or dsPIC families). Lead-free per Microchip standard shipping profile.
