PIC12F1571T-I/MS - 8-Bit MCU, 32MHz, 1.75KB Flash, 3x16-bit PWM | Microchip
MPN: PIC12F1571T-I/MS β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.79 | $0.79 |
| 10 | $0.74 | $7.40 |
| 100 | $0.66 | $66.00 |
| 500 | $0.58 | $290.00 |
| 1,000 | $0.52 | $520.00 |
| 2,500 | $0.46 | $1,150.00 |
PIC12F1571T-I/MS Overview
A microcontroller (MCU) is a single-chip computer containing a CPU, non-volatile program memory (Flash), working RAM, and programmable peripherals. The PIC12 sub-family is Microchip's baseline 8-bit PIC architecture (Harvard RISC), designed for low pin-count, cost-sensitive applications. The PIC12F1571 belongs to the Enhanced Mid-Range PIC family, which adds hardware PWM, comparators, and an internal oscillator to the baseline core. Within the broader taxonomy: PIC12F1571 -> PIC12 enhanced mid-range MCU -> 8-bit PIC -> microcontroller -> embedded IC -> semiconductor.
Key features of the PIC12F1571T-I/MS include three 16-bit PWMs with independent timers for high-resolution LED dimming and motor control, a 10-bit ADC with up to 4 input channels, one comparator, four 10-bit PWMs, an EUSART module, and an I2C/SPI interface. The 8-pin MSOP (MS) package with industrial -40C to +85C temperature range (I-grade) suits compact PCB layouts. Power supply voltage operates from 2.3V to 5.5V (PIC12F1571) or 1.8V to 3.6V (PIC12LF1571 low-voltage variant).
The architecture combines a 14-bit instruction word RISC core with a 32MHz internal oscillator, eliminating external clock components. Three 16-bit PWMs deliver finer duty-cycle resolution than the more common 8/10-bit PWM, supporting smooth dimming and precise motor drive without CPU overhead. Hardware peripheral pin select (PPS) is not present on this 8-pin part, but the device does provide flexible pin remapping through the APFCON register for I/O functions.
Typical applications include high-resolution LED lighting control, stepper motor and DC motor drives, switch-mode power supply (SMPS) digital control loops, battery chargers, fan control, and general-purpose analog/digital mixed-signal embedded designs. Compared to discrete analog PWM circuits, the integrated PIC12F1571 cuts BOM cost and PCB area while providing firmware-configurable control.
When designing with this MCU, place the internal 32MHz oscillator accuracy in mind - it is calibrated to within +/-1% typically but may need a software PLL or external reference for time-critical UART baud rates. Always bypass VDD with a 0.1uF ceramic capacitor close to the pin, and respect the absolute maximum voltage rating of 7V on any pin.
This page synthesizes distributor pricing for the PIC12F1571T-I/MS, drop-in alternatives from the same PIC12 family in the MSOP-8 footprint, and practical design notes not found in the manufacturer datasheet alone, providing information gain beyond DigiKey or Mouser product pages.
Drop-in alternatives for PIC12F1571T-I/MS 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 PIC12F1571T-I/MS (same form factor and footprint) β differing in ADC, Package, I/O Pins, MSL Level, Comparators.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC12F1572T-I/MS
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1501T-I/MS
β Drop-Inβ In Stock
$0.74 / Unit
View Datasheet βPIC12F1571-I/MS
β Drop-Inβ In Stock
$0.58 / Unit
View Datasheet βPIC12F1571-E/MS
β Drop-Inπ Reference alternative (not in catalog)
PIC12LF1571T-I/MS
β Drop-Inπ Reference alternative (not in catalog)
PIC12F1571T-I/SN
β Drop-Inβ In Stock
$0.71 / Unit
View Datasheet βPIC12F1571T-I/MS Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC (Enhanced Mid-Range) |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| RAM | 128 bytes |
| CPU Speed | 32 MHz (16 MIPS / 32 MHz on PIC12F1571) |
| 16-bit PWM Channels | 3 (with independent timers) |
| 10-bit PWM Channels | 4 |
| ADC | 10-bit, up to 4 channels |
| Comparators | 1 |
| EUSART | 1 |
| I/O Pins | 6 (max) |
| Supply Voltage (VDD) | 2.3 V to 5.5 V (PIC12F1571) |
| Operating Temperature | -40 C to +85 C (I-grade) |
| Package | MSOP-8 |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Yes (per Microchip product page) |
| MSL Level | MSL1 (per Microchip packaging spec) |
PIC12F1571T-I/MS Pin Configuration
| Pin 1 | RA3/MCLR/VPP β Digital I/O / Master Clear reset (active-low) / ICSP programming voltage |
| Pin 2 | RA5/CLKIN/OSC1 β Digital I/O / External clock input / Crystal oscillator input |
| Pin 3 | RA4/AN3/CLKOUT/OSC2 β Digital I/O / ADC channel 3 / Clock output / Crystal oscillator output |
| Pin 4 | RA2/AN2/T0CKI/INT/COG1FLT β Digital I/O / ADC channel 2 / Timer0 clock input / External interrupt / CLC fault input |
| Pin 5 | RA1/ICSPCLK/COG1OUT/PWM1/PWM3 β Digital I/O / ICSP clock / CLC output / 16-bit PWM1 / 10-bit PWM3 |
| Pin 6 | RA0/ICSPDAT/COG1IN/PWM2/PWM4 β Digital I/O / ICSP data / CLC input / 16-bit PWM2 / 10-bit PWM4 |
| Pin 7 | VSS β Ground reference |
| Pin 8 | VDD β Positive power supply (2.3V to 5.5V) |
Typical Applications
PIC12F1571T-I/MS is suitable for 6 applications: High-Resolution LED Lighting, Stepper Motor and DC Motor Control, Switch-Mode Power Supply (SMPS) Digital Control, Battery Chargers and Power Banks, Sensor Signal Conditioning and Fan Speed Control, General-Purpose Mixed-Signal Embedded.
High-Resolution LED Lighting
The PIC12F1571T-I/MS is purpose-built for high-resolution LED lighting applications requiring 16-bit PWM granularity. Its three independent 16-bit PWM channels with dedicated timers deliver 65536-step duty-cycle resolution per channel, eliminating visible PWM-induced flicker in dimmable LED strings and enabling smooth color mixing for RGBW fixtures. The 32MHz internal oscillator supports DMX-512, DALI, or WS2812-style protocols with deterministic timing. Designers can implement logarithmic dimming curves that match human eye perception - impossible with 8/10-bit PWMs where low-duty steps produce visible brightness jumps. The MSOP-8 footprint fits inside GU10 spotlights and MR16 retrofit lamps, and the 128-byte RAM is sufficient for color state buffers. Compared to discrete analog PWM ICs, the integrated PIC12F1571 cuts BOM cost and provides firmware-configurable dimming curves, fade-in/out sequencing, and ambient light sensor feedback in one device.
Recommended
Stepper Motor and DC Motor Control
The PIC12F1571T-I/MS handles small stepper motors and brushed DC motor drives for fans, pumps, and valve actuators. Its three 16-bit PWM channels drive two motor windings plus an enable line, while the dedicated timers support microstepping algorithms at rates beyond audible range. With 32MHz CPU bandwidth, the MCU can compute step sequences and current-limiting feedback loops in firmware without DSP overhead. The 10-bit ADC reads back motor current via shunt resistors for closed-loop torque control, and the integrated comparator enables hardware overcurrent protection that shuts down the PWM in microseconds. Compared to dedicated stepper driver ICs like the DRV8833, the PIC12F1571 trades integration for firmware flexibility - microstepping profiles, ramp-up/ramp-down curves, and stall detection algorithms can all be customized. The MSOP-8 footprint fits inside NEMA 11 stepper enclosures, and the I-grade temperature rating supports industrial environments up to +85C ambient.
Recommended
Switch-Mode Power Supply (SMPS) Digital Control
The PIC12F1571T-I/MS provides a low-cost digital control core for non-isolated buck, boost, and buck-boost SMPS converters in sub-100W applications. Its three 16-bit PWM channels deliver the resolution required for digital peak-current-mode control, where the PWM duty cycle is updated every switching cycle based on ADC-sampled current. The 32MHz CPU bandwidth supports switching frequencies up to several hundred kHz with control-loop math executed in firmware, while the dedicated comparator provides cycle-by-cycle hardware current limiting independent of CPU latency. Compared to analog UC3842-style controllers, the PIC12F1571 offers programmable soft-start, adaptive dead-time compensation, and remote telemetry over EUSART without additional components. The MSOP-8 footprint fits inside the auxiliary supply section of larger converter modules. The 10-bit ADC is adequate for voltage-mode control with adequate resolution; for higher-performance applications the PIC12F1572 upgrade offers a fourth PWM channel.
Recommended
Battery Chargers and Power Banks
The PIC12F1571T-I/MS operates as the charge controller in single-cell Li-ion/LiPo or NiMH battery chargers where its three 16-bit PWMs drive a synchronous buck converter and monitor charge current/voltage. The 10-bit ADC samples battery voltage and charge current through current-sense resistors, while firmware implements CC/CV (constant-current/constant-voltage) charge profiles, temperature monitoring via the integrated comparator, and termination detection. The 32MHz CPU bandwidth supports USB-C PD negotiation logic or basic USB BC1.2 detection protocols, and the EUSART enables status reporting to a host MCU. Compared to dedicated charger ICs like the MCP73831, the PIC12F1571 adds programmability - charge profiles, fault recovery behavior, and end-of-charge criteria can all be field-updated. The MSOP-8 footprint fits inside compact USB power banks, and the industrial -40C to +85C temperature range supports outdoor solar charger applications.
Recommended
Sensor Signal Conditioning and Fan Speed Control
The PIC12F1571T-I/MS combines analog and digital functions for sensor signal conditioning and closed-loop fan speed control. The 10-bit ADC reads temperature from a thermistor or analog temperature sensor, while the comparator detects over-temperature thresholds for hardware-level shutdown. The three 16-bit PWMs drive a 3-phase fan or multiple single-phase fans, with duty cycle adjusted based on measured temperature using PID control firmware. Compared to discrete analog fan controllers, the PIC12F1571 provides programmable temperature-to-speed curves, acoustic optimization, and fault detection (stalled rotor, failed sensor) all in firmware. The EUSART enables tachometer feedback decoding and host-CLI logging of temperature/fan speed history. The MSOP-8 footprint fits inside PC chassis fan hubs or industrial cooling assemblies, and the I-grade temperature rating supports industrial server environments.
Recommended
General-Purpose Mixed-Signal Embedded
The PIC12F1571T-I/MS serves as the central MCU in cost-driven mixed-signal embedded designs where 8 pins and three 16-bit PWMs are sufficient. Applications include toys, small appliances, IoT sensor nodes, programmable timers, and remote-control transmitters. The 32MHz CPU, 1.75KB Flash, and 128 bytes of RAM handle state machines, button debouncing, LED indication, and low-speed UART or I2C communication to companion sensors or host MCUs. The integrated 10-bit ADC reads analog sensors, while the comparator enables threshold-based event detection without CPU polling. Compared to lower-end PIC10F devices, the PIC12F1571's 128-byte RAM and EUSART module support richer application logic in firmware. The MSOP-8 footprint fits inside compact handheld enclosures, and the 2.3V to 5.5V supply range allows operation directly from 2x AA alkaline cells or single-cell Li-ion. The Microchip MPLAB X IDE and XC8 compiler provide free development tools.
Recommended
Recommended Products Summary
Engineering reference data for PIC12F1571T-I/MS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F1572T-I/MS | PIC12F1501T-I/MS | PIC12F1571-I/MS | PIC12F1571-E/MS | PIC12LF1571T-I/MS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | MSOP-8 | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same | MSOP-8 - same |
| Flash Memory | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| 16-bit PWM Channels | 3 | 4 (upgrade) | 2 (lower) | 3 (same) | 3 (same) | 3 (same) |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Operating Voltage | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 1.8V to 3.6V (low-voltage) |
| Operating Temperature | -40C to +85C (I-grade) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (E-grade, wider) | -40C to +85C |
| Unit Price (1 pc) | $0.79 | $0.85 (approx) | $0.70 (approx) | $0.85 (tube) | $1.00 (approx) | $0.82 (approx) |
Key Differentiators
- Three independent 16-bit PWMs in 8 pins (vs PIC12F1501T-I/MS)
- Drop-in same-package upgrade with additional 16-bit PWM (vs PIC12F1572T-I/MS)
- Industrial -40C to +85C operating range with E-grade variant available (vs PIC12F1571T-I/SN)
Design Notes
Bypass VDD (pin 8) with a 0.1uF ceramic capacitor placed within 5mm of the package. For designs with heavy PWM switching loads that create VDD bounce, add a bulk 1uF to 10uF tantalum or ceramic in parallel. The PIC12F1571 draws approximately 1.5mA at 32MHz with all peripherals active - well within the regulator capability of a standard 3.3V LDO like the MCP1700. Estimated: total BOM current including MCU plus capacitive load at full duty cycle PWM should not exceed the LDO rated output by more than 20% for thermal margin.
Keep the MSOP-8 thermal pad (if exposed) soldered to a small copper pour for mechanical robustness, although the PIC12F1571's low current consumption rarely requires thermal dissipation. Maintain at least 0.2mm clearance between adjacent pins to avoid solder bridges during hand-rework. For noise-sensitive analog applications using the 10-bit ADC, route analog signals (AN2/AN3) away from PWM output traces to minimize digital-to-analog crosstalk. Ground the VSS pin with a direct via to the ground plane to reduce ground bounce.
Do not exceed the absolute maximum VDD rating of 7V; sustained over-voltage will damage the MCU. When using MCLR reset (RA3/MCLR/VPP), never leave the pin floating - tie to VDD through a 10k resistor for proper reset behavior. The internal 32MHz oscillator is factory-calibrated but is sensitive to VDD voltage changes; for UART baud-rate-critical applications, use the Fosc PLL with HFINTOSC trim registers or add an external crystal. Programming via ICSP requires both ICSPCLK (RA1) and ICSPDAT (RA0) to be accessible; do not route these pins to high-impedance-only loads during development.
For PWM-driven LED or motor designs, route PWM outputs (RA0, RA1, RA4) as short traces with a ground-reference via adjacent to each pin to reduce radiated EMI. When using the comparator or ADC for analog signals, place analog ground (if split) under the analog section and digital ground under PWM outputs. The MSOP-8 package has a lead pitch of 0.65mm - use 0.4mm-wide traces between pins and avoid placing vias under the package body.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified; for automotive designs choose PIC12F1571-E/MS (extended temperature grade). REACH compliance per Microchip environmental compliance documentation.
