PIC12F1571-I/SN - 8-bit MCU 32MHz 1.75KB Flash 8-SOIC | Microchip
MPN: PIC12F1571-I/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.93 | $0.93 |
| 10 | $0.85 | $8.50 |
| 100 | $0.72 | $72.00 |
| 500 | $0.68 | $340.00 |
| 1,000 | $0.6549 | $654.90 |
PIC12F1571-I/SN Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile data memory, and peripheral functions such as timers, ADC, PWM, and communication interfaces. PIC microcontrollers from Microchip Technology use a RISC-based 8-bit core, an enhanced mid-range architecture in the PIC12F1571 case, and are widely used as compact control ICs in cost- and space-constrained embedded designs where they sit hierarchically between simple discrete logic and higher-pin-count system-on-chip devices.
Key features of the PIC12F1571-I/SN include three 16-bit PWMs with independent timers suitable for high-resolution LED dimming, motor control and power-conversion feedback; a 10-bit ADC with up to 4 input channels; a comparator with rail-to-rail inputs; and 6 I/O pins on the 8-pin SOIC footprint. The device operates across -40C to +85C industrial temperature range, supports in-circuit serial programming (ICSP) via two pins, and integrates an internal 32MHz oscillator accurate to within plus or minus 1 percent.
Architecturally, the PIC12F1571-I/SN uses an 8-bit modified Harvard core with a 14-bit instruction word, which allows single-word instructions and a 32MHz oscillator to deliver up to 8 MIPS of throughput. On-chip peripherals share a common interrupt structure, and three PWM channels can be operated independently for full-bridge, half-bridge, or RGB color-mixing topologies without external driver logic.
Typical applications include high-resolution LED lighting and RGB color control, DC-DC converter digital control, battery charging circuits, small DC and stepper motor drives, fan and pump control, and general-purpose replacement of discrete analog timing circuits in consumer white goods. The three 16-bit PWMs in particular position the part for cost-effective digitally controlled power and lighting.
When designing with this part, note that the 8-pin SOIC provides only 6 usable I/O pins; pin-function multiplexing through the PPS-like peripheral mapping and careful assignment of analog versus digital functions is essential. Provide a 100nF decoupling capacitor close to VDD and follow Microchip AN1993 and PIC12F1571 application notes for ICSP layout.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet to help engineers shorten the selection cycle.
Drop-in alternatives for PIC12F1571-I/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-I/SN (same form factor and footprint) — differing in Package, Operating Temperature, ADC, MSL Level, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12F1571-E/SN
✅ Drop-In✓ In Stock
$0.65 / Unit
View Datasheet →PIC12F1571T-I/SN
✅ Drop-In✓ In Stock
$0.71 / Unit
View Datasheet →PIC12F1571-I/RF
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →PIC12F1571-I/MS
✅ Drop-In✓ In Stock
$0.58 / Unit
View Datasheet →PIC12F1501-E/SN
✅ Drop-In✓ In Stock
$0.58 / Unit
View Datasheet →PIC12F1501-I/P
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →PIC12F1571-I/SN Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC enhanced mid-range |
| Program Memory (Flash) | 1.75 KB (1K x 14) |
| Data RAM | 128 bytes |
| Data EEPROM | 128 bytes |
| Maximum CPU Speed | 32 MHz |
| Instruction Throughput | 8 MIPS |
| Operating Voltage Range | 1.8 V to 5.5 V |
| PWM Channels | 3 x 16-bit (independent timers) |
| ADC | 10-bit, up to 4 channels |
| Comparators | 1 with rail-to-rail input |
| I/O Pins | 6 |
| Package | 8-pin SOIC (SN) |
| Operating Temperature | -40 C to +85 C (industrial, -I suffix) |
| Internal Oscillator | 32 MHz (plus or minus 1 percent) |
| Programming Interface | ICSP (2-wire) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
PIC12F1571-I/SN Pin Configuration
| Pin 1 | RA3/MCLR/VPP — Digital I/O / master clear reset (active low) / ICSP programming voltage |
| Pin 2 | RA0/ICSPDAT — Digital I/O / ICSP data / analog input |
| Pin 3 | RA1/ICSPCLK — Digital I/O / ICSP clock / analog input |
| Pin 4 | RA2 — Digital I/O / analog input / comparator output |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RA4/OSC2 — Digital I/O / oscillator output / PWM output |
| Pin 7 | RA5/OSC1/CLKIN — Digital I/O / oscillator input / external clock input |
| Pin 8 | VDD — Positive supply (1.8 V to 5.5 V) |
Typical Applications
PIC12F1571-I/SN is suitable for 6 applications: High-Resolution LED Lighting and RGB Color Mixing, DC-DC Converter Digital Control, Battery Charging Management for Single-Cell Li-ion, Small DC Motor and Fan Speed Control, Consumer White Goods and Appliance Control, Industrial Sensor Signal Conditioning and PWM Output.
High-Resolution LED Lighting and RGB Color Mixing
The PIC12F1571-I/SN is a strong fit for high-resolution LED lighting because its three independent 16-bit PWM channels provide 65536-step resolution per channel. Engineers can drive red, green, and blue channels simultaneously for smooth 16-million-color mixing without external PWM ICs. The 32 MHz internal oscillator with plus or minus 1 percent accuracy keeps color stable across temperature. At 1.8 V minimum VDD, the part also runs from a single Li-ion cell. Place a 100 nF ceramic bypass on VDD and keep PWM traces short to minimize EMI coupling into the LED anode wiring. Compared to discrete 555-timer PWM chains, the PIC12F1571-I/SN reduces board area, improves long-term timing accuracy, and allows firmware-tunable color profiles.
Recommended
DC-DC Converter Digital Control
The PIC12F1571-I/SN enables digital control of small non-isolated DC-DC converters such as buck, boost, and SEPIC stages. Its three 16-bit PWMs can drive synchronous MOSFET gates through a low-side gate driver, while the 10-bit ADC samples the output voltage on a divided feedback node. The comparator can be wired as a fast-cycle-by-cycle current limit. The 8 MIPS throughput at 32 MHz supports voltage-mode control loops at switching frequencies up to 500 kHz with adequate resolution. Compared to analog UC3842-class controllers, the PIC12F1571-I/SN lets engineers tune soft-start, frequency, and protection thresholds in firmware, shortening design iteration time.
Recommended
Battery Charging Management for Single-Cell Li-ion
The PIC12F1571-I/SN can implement single-cell Li-ion or LiPo CC-CV charging with the on-chip 16-bit PWM controlling a switching FET, the 10-bit ADC monitoring battery voltage and current, and the comparator acting as an over-current protection comparator. Operating from 1.8 V to 5.5 V, it can run directly from a USB 5 V rail or a 4.2 V regulated source. The 128-byte EEPROM stores calibration and safety thresholds. Compared to dedicated charger ICs, the PIC12F1571-I/SN offers flexible algorithm customization for chemistries such as LiFePO4 or NiMH at the cost of firmware development effort.
Recommended
Small DC Motor and Fan Speed Control
The PIC12F1571-I/SN is well suited to small brushed DC motor or fan speed control where the three independent 16-bit PWMs can drive high-side, low-side, and brake paths of a half-bridge gate driver. The 10-bit ADC reads back-back-EMF or tachometer pulses for closed-loop control, while the comparator provides hardware current limiting independent of firmware. At 32 MHz, the 8 MIPS throughput supports PID control loops with 1 kHz update rates. Compared to discrete op-amp PWM controllers, the PIC12F1571-I/SN integrates timing, control, and protection in a single 8-pin SOIC.
Recommended
Consumer White Goods and Appliance Control
The PIC12F1571-I/SN fits cost-sensitive consumer white goods such as coffee makers, rice cookers, air purifiers, and small kitchen appliances. Its three 16-bit PWMs can drive heater elements, pumps, and indicator LEDs simultaneously. The 128-byte EEPROM stores user settings through power cycles, while the comparator provides safety over-temperature shutdown when paired with an NTC divider. Operating at 1.8 V to 5.5 V and -40 C to +85 C, it tolerates the wide temperature and supply ranges typical of kitchen and laundry environments. Compared to discrete 555/CMOS logic timing chains, the PIC12F1571-I/SN reduces component count, simplifies EMC compliance, and enables software-defined feature differentiation.
Recommended
Industrial Sensor Signal Conditioning and PWM Output
The PIC12F1571-I/SN can serve as a smart analog front-end that reads a sensor with its 10-bit ADC and emits a 4-20 mA or PWM-representative output. Its three 16-bit PWMs allow simultaneous drive of an H-bridge driver, an excitation source, and an indicator LED. The rail-to-rail comparator can be used to detect sensor faults or threshold crossings independent of the CPU. The -40 C to +85 C industrial temperature grade suits factory and process-control environments. Compared to a pure analog signal chain, the PIC12F1571-I/SN enables linearization in firmware, on-the-fly calibration via the 128-byte EEPROM, and easy protocol migration to PWM or frequency-output standards.
Recommended
Recommended Products Summary
Engineering reference data for PIC12F1571-I/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F1571-E/SN | PIC12F1571T-I/SN | PIC12F1571-I/RF | PIC12F1501-E/SN |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-SOIC (SN) | 8-SOIC (SN) - same | 8-SOIC (SN) - same | UDFN-8 (RF) - smaller footprint, pin-compatible | 8-SOIC (SN) - same |
| Program Memory (Flash) | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB |
| PWM Channels / Resolution | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 2 x 10-bit |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Data EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | DATA_NEEDED |
Key Differentiators
- Three independent 16-bit PWM channels on a tiny 8-pin MCU (vs PIC12F1501-E/SN)
- Industrial -40 C to +85 C operating range standard (vs PIC12F1571-E/SN)
- 32 MHz internal oscillator with plus or minus 1 percent accuracy (vs PIC12F1571-I/RF)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 8) with the ground return via the shortest path to pin 5 VSS. For designs switching 16-bit PWM outputs at high frequency, add a 10 uF bulk capacitor on the VDD rail to handle transient current demands. The PIC12F1571-I/SN can operate from 1.8 V to 5.5 V; do not exceed 5.5 V or risk latch-up. The -I grade operates from -40 C to +85 C; for -40 C to +125 C, switch to the PIC12F1571-E/SN drop-in alternative.
Reserve the MCLR pin (pin 1) for either a reset pushbutton or a 10 kohm pull-up to VDD; do not leave it floating. If ICSP programming is required, route the ICSPDAT (pin 2) and ICSPCLK (pin 3) lines to a 6-pin header with no series resistors greater than 100 ohm. Keep PWM traces short (under 25 mm) and away from analog feedback traces to minimize crosstalk into the ADC sample. Reference Microchip application note AN1993 for ICSP layout recommendations and the PIC12F1571 family errata for silicon revision-specific behavior.
Do not assume the internal 32 MHz oscillator is accurate enough for UART communication without calibration; the plus or minus 1 percent initial tolerance plus plus or minus 5 percent across temperature can exceed the 2 percent UART baud-rate error budget. For UART applications, calibrate against the 31 kHz LFINTOSC, use the FOSC calibration word in the last location of Flash, or use an external crystal. Also remember the three 16-bit PWMs share a common time base by default; configure the PWM timer prescalers and periods in software to avoid frequency aliasing when driving multiple outputs.
Compliance Information
RoHS compliant and halogen-free per Microchip product page. Not AEC-Q100 qualified; for automotive use consider PIC12F1571-E/SN extended temperature grade but verify with Microchip automotive portfolio.