PIC12F1571-E/MS - 8-bit MCU, 32MHz, 1.75KB Flash, 16-bit PWM | Microchip
MPN: PIC12F1571-E/MS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.31 | $655.00 |
| 1,000 | $1.16 | $1,160.00 |
PIC12F1571-E/MS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash/ROM), volatile data memory (RAM), and peripheral subsystems (timers, ADC, communication interfaces) into one package, forming the lowest tier of the embedded computing hierarchy: microcontroller -> microprocessor -> computer system. The PIC12F1571 belongs to the 8-bit microcontrollers product class, which sits beneath 16-bit and 32-bit MCUs in computational throughput but above pure digital logic in integration density. Its 8-pin footprint makes it the smallest PIC12 variant, ideal for space-constrained designs.
Key specifications include an operating voltage range of 2.3 V to 5.5 V (extended range supports operation down to 1.8 V with reduced frequency), up to 32 MHz internal oscillator, six I/O pins, and a 10-bit ADC with up to 6 channels. Three independent 16-bit PWM channels support edge- and center-aligned modes with hardware dead-band control, making the device well-suited for LED dimming and power-conversion tasks. The integrated comparator with selectable references enables analog signal conditioning without external components, while the FVR provides stable ADC and comparator voltage references.
The PIC12F1571 uses the enhanced PIC Mid-Range 14-bit instruction set, executes most instructions in a single clock cycle, and offers nanoWatt XLP technology for low-power sleep modes. The device supports in-circuit serial programming (ICSP) via two pins, eliminating the need for an external programmer socket. Available in 8-pin PDIP, SOIC, MSOP, and DFN packages, the PIC12F1571 ships in an 8-MSOP (3.00 mm body width) format for the -E/MS variant, providing compact surface-mount placement for high-density designs.
Typical applications include LED lighting and dimming controllers, small appliance motor control (especially stepper motor and DC brushed motor drivers), battery-powered sensor nodes, simple switched-mode power supply (SMPS) control loops, and low-cost analog signal conditioning. The combination of three 16-bit PWMs and a comparator in an 8-pin package is rare, making this MCU a strong fit for cost-sensitive mixed-signal designs.
When designing with the PIC12F1571, ensure VDDCORE capacitance (typically 0.1 microfarad plus 1 microfarad) is placed within 4 mm of the dedicated core supply pin. The ICSPDAT and ICSPCLK pins must be accessible for in-circuit programming, even in production boards, and the MCLR pin should have a proper pull-up network to ensure reliable reset behavior. Always check the latest Microchip errata document for the PIC12F1571 silicon revision you are using.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, providing engineering buyers and PCB designers with a single source for procurement decisions, footprint compatibility verification, and application-specific guidance.
Drop-in alternatives for PIC12F1571-E/MS — 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/MS (same form factor and footprint) — differing in ADC, Comparators, I/O Pins, Package, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12F1571-I/MS
✅ Drop-In✓ In Stock
$0.58 / Unit
View Datasheet →PIC12F1572-I/MS
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →PIC12LF1571-I/MS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC12F1501-I/MS
✅ Drop-In✓ In Stock
$0.55 / Unit
View Datasheet →PIC12F1571T-I/MS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.46 / Unit
View Datasheet →PIC12F1571-E/MC
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC12F1571-E/MS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC Enhanced Mid-Range 8-bit CPU |
| Instruction Set | 14-bit, 49 instructions, 16 stack levels |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data SRAM | 128 bytes |
| Data EEPROM | 256 bytes |
| Operating Voltage Range | 2.3 V to 5.5 V (extended down to 1.8 V with reduced frequency) |
| I/O Pins | 6 |
| ADC | 10-bit, up to 6 channels |
| PWM Channels | 3 x 16-bit (independent timers) |
| Comparators | 1 with selectable references |
| Fixed Voltage Reference (FVR) | Yes |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Communication | None (no UART/SPI/I2C hardware) |
| Package | 8-pin MSOP (3.00 mm body width) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +125C (E suffix = Enhanced) |
| ICSP Programming | Yes (ICSPDAT/ICSPCLK) |
| RoHS Status | Compliant |
PIC12F1571-E/MS Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.3V to 5.5V) |
| Pin 2 | RA5/ICSPDAT/CLKIN — GPIO / ICSP data / external clock input |
| Pin 3 | RA4/ICSPCLK/SOSCO — GPIO / ICSP clock / secondary oscillator output |
| Pin 4 | RA3/MCLR/VPP — GPIO / Master Clear reset (active low) / programming voltage |
| Pin 5 | RA2/AN2/T0CKI/CWG1FLT — GPIO / ADC channel 2 / Timer0 clock input / CWG fault input |
| Pin 6 | RA1/AN1/CIN-/ICSPCLK — GPIO / ADC channel 1 / Comparator inverting input / alternate ICSP clock |
| Pin 7 | RA0/AN0/CIN+/ICSPDAT — GPIO / ADC channel 0 / Comparator non-inverting input / alternate ICSP data |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12F1571-E/MS is suitable for 6 applications: Full-Color LED Lighting and Dimming Controllers, Small Stepper Motor and Brushed DC Motor Control, Battery-Powered Wireless Sensor Nodes, Low-Cost Switched-Mode Power Supply (SMPS) Controllers, Analog Signal Conditioning and Threshold Detection, Simple Fan and Pump Speed Controllers.
Full-Color LED Lighting and Dimming Controllers
The PIC12F1571-E/MS is purpose-built for full-color RGB LED dimming because it integrates three independent 16-bit PWM channels in an 8-pin package - one PWM per color channel. With 16-bit resolution (65,536 steps), the device can achieve deep-dimming below 0.1 percent duty cycle without visible flicker, addressing a critical limitation of 8-bit or 10-bit PWM controllers. Place the three PWMs on RA0, RA1, and RA2 driving three small MOSFETs (such as 2N7002) that switch the R, G, B LED cathodes to ground; the MCU's 32 MHz core allows smooth logarithmic dimming curves via software gamma correction. Power consumption remains low thanks to nanoWatt XLP sleep modes, making battery-powered decorative LED strips practical.
Recommended
Small Stepper Motor and Brushed DC Motor Control
For small stepper motors (28BYJ-48 and similar) and brushed DC gearmotors used in appliances and IoT devices, the PIC12F1571-E/MS offers the rare combination of three 16-bit PWMs and a hardware comparator in an 8-pin footprint. Use PWM channel 1 to drive the H-bridge enable line while comparator inputs monitor back-EMF for stall detection - eliminating an external op-amp and reducing BOM cost. The 16-bit PWM resolution provides microstep-quality smoothness with discrete microstepping algorithms, and the 32 MHz instruction rate keeps commutator loop times well under 100 microseconds. Industrial temperature grade (-40C to +125C for E) supports under-hood automotive and appliance environments.
Recommended
Battery-Powered Wireless Sensor Nodes
Battery-powered sensor nodes benefit from the PIC12F1571-E/MS wide operating voltage range (2.3 V to 5.5 V) and nanoWatt XLP low-power technology, which allows the MCU to draw under 1 microamp in deep sleep mode. The 10-bit ADC with up to 6 channels can directly read thermistor, photodiode, or other analog sensor outputs, while the integrated FVR provides a stable reference for accurate measurements across the battery discharge curve. The 8-pin MSOP package keeps the BOM footprint under 25 square millimeters, leaving room for a coin-cell holder or small Li-ion cell plus a low-power RF module (sub-GHz or BLE) on the same PCB.
Recommended
Low-Cost Switched-Mode Power Supply (SMPS) Controllers
For low-power flyback, buck, or boost SMPS controllers in the 1-10 watt range, the PIC12F1571-E/MS 16-bit PWM with hardware dead-band control provides precise switching frequency and timing without external PWM ICs. The integrated comparator can implement current-mode control by sensing the switch current via a shunt resistor, while the FVR stabilizes the current-sense reference. The MCU's high-speed 32 MHz core supports voltage-mode control loops at switching frequencies up to 250 kHz, sufficient for compact consumer power adapters and auxiliary supplies. The E temperature grade enables industrial-rated power supplies operating from -40C ambient.
Recommended
Analog Signal Conditioning and Threshold Detection
The PIC12F1571-E/MS integrated analog comparator with selectable internal references allows direct threshold detection and signal conditioning without external op-amps. Use the comparator to convert analog sensor signals (temperature, light, pressure) into clean digital outputs that wake the MCU from sleep, enabling event-driven ultra-low-power designs. The FVR (Fixed Voltage Reference) provides selectable 1.024 V, 2.048 V, or 4.096 V internal references for both the comparator and the 10-bit ADC, eliminating the need for an external reference IC and reducing the BOM count for cost-sensitive threshold detectors and window comparators.
Recommended
Simple Fan and Pump Speed Controllers
Small DC fans and pumps used in consumer electronics, networking equipment, and home appliances benefit from the PIC12F1571-E/MS 16-bit PWM for smooth, quiet speed control over the full 0-100 percent range. Drive the fan or pump MOSFET directly from a PWM output while reading back-EMF or Hall sensor signals on the analog comparator for tachometer feedback and stall protection. The 32 MHz instruction rate and 16-bit PWM resolution allow acoustic-optimized control algorithms that minimize audible switching artifacts. Industrial temperature grade (E suffix) supports appliance and under-hood automotive fan applications.
Recommended
Recommended Products Summary
Engineering reference data for PIC12F1571-E/MS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F1571-I/MS | PIC12F1572-I/MS | PIC12LF1571-I/MS | PIC12F1501-I/MS | PIC12F1571T-I/MS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-MSOP (3.00 mm) | 8-MSOP (3.00 mm) - same | 8-MSOP (3.00 mm) - same | 8-MSOP (3.00 mm) - same | 8-MSOP (3.00 mm) - same | 8-MSOP (3.00 mm) - same |
| Flash Memory | 1.75 KB | 1.75 KB | 3.5 KB (+100%) | 1.75 KB | 1.75 KB | 1.75 KB |
| SRAM | 128 bytes | 128 bytes | 256 bytes (+100%) | 128 bytes | 128 bytes | 128 bytes |
| PWM Channels | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 4 x 10-bit | 3 x 16-bit |
| Operating Voltage | 2.3V to 5.5V | 2.3V to 5.5V | 2.3V to 5.5V | 1.8V to 3.6V (lower) | 2.3V to 5.5V | 2.3V to 5.5V |
| Temperature Range | -40C to +125C (Enhanced) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Maximum Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
Key Differentiators
- Three 16-bit PWM channels in 8-pin package (vs PIC12F1501-I/MS)
- Enhanced -40C to +125C temperature grade (vs PIC12F1571-I/MS)
- Direct Flash upgrade path to 3.5 KB (vs PIC12F1572-I/MS)
Design Notes
The PIC12F1571-E/MS integrates an internal voltage regulator that produces VDDCORE from the VDD pin; place a 0.1 microfarad decoupling capacitor within 4 mm of the VDD pin (pin 1) and a 1 microfarad bulk capacitor on the same supply rail. According to Microchip's datasheet, both capacitors are required for stable operation - omitting the bulk capacitor can cause core voltage droop during PWM switching transients. For battery-powered designs, the nanoWatt XLP sleep mode reduces current to under 1 microamp, but the VDD rail must remain above 2.3 V to retain SRAM contents.
Do not leave the MCLR pin (pin 4) floating - it requires either an external 10 kohm pull-up to VDD or use of the internal weak pull-up enabled via the CONFIG register. A floating MCLR pin causes intermittent resets and unreliable ICSP programming. According to Microchip's datasheet, when using the internal MCLR pull-up, ensure no capacitive load greater than 50 pF is attached to the pin, as this slows the rise time and may trigger spurious resets.
For 8-MSOP layout, place ICSP programming test points on RA0 (ICSPDAT) and RA1 (ICSPCLK) so that the device can be reprogrammed in-circuit without removing components. According to Microchip's ICSP specification, a 4.7 kohm pull-down on ICSPCLK and a 4.7 kohm pull-up on ICSPDAT is recommended for robust programming in noisy environments. Keep the trace length from the MCU pins to the programming connector under 50 mm to avoid signal integrity issues at 32 MHz operation.
Compliance Information
RoHS and REACH compliance per Microchip product page; the E temperature grade (-40C to +125C) supports industrial environments but is not AEC-Q100 automotive-qualified. For AEC-Q100 requirements, consider the PIC12F1571-E/P automotive variant or contact Microchip for Q-graded die options.
