PIC12LF1571-E/SN - 8-Bit 32MHz MCU, 1.75KB FLASH, 8-SOIC | Microchip
MPN: PIC12LF1571-E/SN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.97 | $0.97 |
| 10 | $0.89 | $8.90 |
| 100 | $0.78 | $78.00 |
| 500 | $0.68 | $340.00 |
| 1,000 | $0.59 | $590.00 |
PIC12LF1571-E/SN Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory, data memory, and programmable peripherals into a single chip. The PIC12 family sits at the entry point of the 8-bit PIC architecture tree (PIC10/12/16/18), optimized for small-pin-count, low-cost designs. Within the broader taxonomy, an MCU is a type of microprocessor (MPU) -> central processing unit -> semiconductor IC. The LF prefix indicates the wide-Vdd, low-power process variant, distinguishing it from the standard F-series parts that run only at higher supply voltages.
Key features of the PIC12LF1571 include three independent 16-bit PWMs with dedicated timers, ideal for high-resolution control tasks, plus a 10-bit ADC, a 5-bit DAC, an analog comparator, and the CWG (Complementary Waveform Generator) peripheral. The device also provides enhanced peripherals such as the Configurable Logic Cell (CLC) and the Numerically Controlled Oscillator (NCO) for frequency synthesis. The peripheral set supports applications ranging from LED lighting and motor control to general-purpose digital and analog signal conditioning.
Architecturally, the PIC12LF1571 uses the enhanced mid-range PIC core with a 14-bit instruction word and a modified Harvard bus structure, providing deterministic instruction timing. The 32 MHz internal oscillator (with PLL multiplier from a 16 MHz source) yields a 125 ns instruction cycle, while the 16-bit PWM resolution at the slowest selectable clock allows sub-microsecond timing precision. On-chip peripherals are routed through the peripheral pin select (PPS) limited set, simplifying PCB layout compared to fixed-function MCUs.
Typical applications include high-resolution LED lighting and color mixing, stepper motor and DC-motor control loops, low-cost switch-mode power supply controllers, ceiling-fan and small appliance control, and general-purpose sensor interfaces. The small 8-SOIC footprint and LF low-voltage operation also suit battery-powered IoT sensor nodes, wearables, and remote controls where board area and quiescent current are at a premium.
When designing with this device, budget for at least 2.0V rail headroom if using the analog comparator or ADC at full speed, and select the 8 MHz HFINTOSC mode when EMC compliance demands lower switching harmonics. For new designs, prefer the PIC12LF1572 (same family with more peripherals and pins) when additional timers are required, or the PIC16F1xxx family when migrating to a 16-bit PWM core is desirable.
This page synthesizes distributor pricing from DigiKey and Mouser, parametric drop-in alternatives verified against the Microchip datasheet (40001723D), and practical design notes covering oscillator selection and PWM output filtering that are not consolidated in the manufacturer datasheet.
Drop-in alternatives for PIC12LF1571-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 PIC12LF1571-E/SN (same form factor and footprint) — differing in Operating Temperature, Package, Comparators, Core Architecture, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC12F1571-E/SN
✅ Drop-In✓ In Stock
$0.65 / Unit
View Datasheet →PIC12LF1571-I/SN
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC12LF1571T-I/SN
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC12F1571-I/SN
✅ Drop-In✓ In Stock
$0.6549 / Unit
View Datasheet →PIC12LF1572-E/SN
✅ Drop-In✓ In Stock
$0.76 / Unit
View Datasheet →PIC12LF1571-E/SN Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit Enhanced Mid-Range (14-bit instruction word) |
| Program Memory (FLASH) | 1.75 KB (1K x 14) |
| Data SRAM | 128 bytes |
| Data EEPROM | 64 bytes |
| Maximum CPU Speed | 32 MHz (125 ns instruction cycle) |
| Supply Voltage (Vdd) | 1.8 V to 3.6 V (LF wide-Vdd variant) |
| Operating Temperature | -40C to +125C (E = extended grade) |
| Package | 8-SOIC (3.9 mm / 0.15 in body) |
| Mounting Type | Surface Mount |
| Pin Count | 8 |
| 16-bit PWM Channels | 3 (independent timers) |
| ADC | 10-bit |
| DAC | 5-bit |
| Analog Comparators | 1 |
| Complementary Waveform Generator (CWG) | Yes |
| Configurable Logic Cell (CLC) | Yes |
| Numerically Controlled Oscillator (NCO) | Yes |
| RoHS Status | Compliant |
PIC12LF1571-E/SN Pin Configuration
| Pin 1 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
| Pin 2 | RA5 — Digital I/O / PWM3 / analog input |
| Pin 3 | RA4 — Digital I/O / PWM2 / analog input |
| Pin 4 | RA3 — Digital I/O only (input-only, MCLR alternative) |
| Pin 5 | RA2 — Digital I/O / PWM1 / analog input |
| Pin 6 | RA1 — Digital I/O / comparator output / analog input |
| Pin 7 | RA0 — Digital I/O / ICSPDAT / analog input |
| Pin 8 | VSS — Ground reference |
Typical Applications
PIC12LF1571-E/SN is suitable for 6 applications: RGB LED Lighting & Color Mixing, Stepper Motor & DC Motor Control, Switch-Mode Power Supply (SMPS) Controllers, Ceiling Fans & Small Appliance Control, Battery-Powered IoT Sensor Nodes, Remote Control & User Interface Hubs.
RGB LED Lighting & Color Mixing
The PIC12LF1571's three independent 16-bit PWM channels make it ideal for high-resolution RGB LED dimming and color mixing. At 32 MHz core the 16-bit resolution yields 7.8125 ns PWM step granularity, supporting smooth fades without visible stepping. The LF 1.8-3.6V supply lets a single-cell Li-ion or 2x AA stack drive white, RGB, or RGBW LEDs directly, while the 8-SOIC footprint minimizes board area in bulb and strip retrofits. The CWG peripheral can generate complementary drive signals for half-bridge LED drivers. Trade-off: at large VIN-VOUT deltas the internal LDO dissipates modest heat; expect ~50 mA total quiescent in active mode.
Recommended
Stepper Motor & DC Motor Control
Three 16-bit PWMs plus the CWG complementary waveform generator let the PIC12LF1571 drive bipolar stepper coils and brushless DC motors directly via external MOSFET half-bridges. The 32 MHz instruction cycle provides a 125 ns loop time, fast enough for 20 kHz PWM commutation without CPU saturation. The NCO can synthesize precise step rates for microstepping algorithms, and the analog comparator supports back-EMF zero-cross detection. Best fits small steppers (28 mm frame) and low-power fans. Limitation: 1.75 KB FLASH constrains the control loop to PID variants or table-driven commutation rather than full vector control.
Recommended
Switch-Mode Power Supply (SMPS) Controllers
The PIC12LF1571's high-resolution 16-bit PWM and fast analog comparator make it a credible low-cost SMPS controller for sub-50 W topologies. The CWG generates complementary gate drive with programmable dead time, suitable for synchronous buck, boost, or half-bridge converters. The 10-bit ADC samples the feedback node at up to 100 ksps, while the LF process variant operates from 1.8-3.6V - perfect for battery charger tap points. Per the Microchip PIC12(L)F1571/2 datasheet, the NCO can implement digital frequency synthesis for spread-spectrum EMI mitigation.
Recommended
Ceiling Fans & Small Appliance Control
The PIC12LF1571's three 16-bit PWMs suit the multi-speed control loop of a ceiling fan or blender, where one PWM drives the motor and two control triac-fired AC stages or auxiliary valves. The LF 1.8-3.6V supply derives directly from a rectified AC tap with a small Zener, eliminating the auxiliary SMPS typical in fan designs. Extended -40C to +125C temperature grade (E suffix) meets appliance under-hood thermal stress. The CLC peripheral implements hardware interlocks without software overhead. Trade-off: only 1.75 KB FLASH limits UI feature scope to rotary encoder plus LED bar.
Recommended
Battery-Powered IoT Sensor Nodes
The PIC12LF1571's LF 1.8-3.6V supply, 128-byte SRAM, and 64-byte EEPROM suit coin-cell or single-cell Li-ion sensor nodes reporting temperature, humidity, or PIR motion. The 32 MHz core wakes briefly to sample, process, and transmit via a companion radio, then sleeps at microamp-level standby. The on-chip 10-bit ADC reads analog sensors directly, while the CLC implements ultra-low-power hardware wake logic. Per the Microchip PIC12(L)F1571/2 datasheet, the IDLE and SLEEP modes with peripheral clock gating preserve battery life below 1 microamp average.
Recommended
Remote Control & User Interface Hubs
The PIC12LF1571's 8-SOIC small footprint and 6 I/O pins cover matrix keypads up to 3x3 plus an IR LED PWM output, making it a natural fit for handheld remote controls. The 16-bit PWM generates precise 38 kHz carrier for IrDA-style transmission, while the comparator reads demodulated IR for receive. The LF voltage range supports 2x AAA cells without a boost converter. Per the Microchip PIC12(L)F1571/2 datasheet, the EUSART handles sync IR protocols (RC5, SIRC) alongside the PWM transmit, leaving the 16-bit PWMs free for LED backlighting.
Recommended
Recommended Products Summary
Engineering reference data for PIC12LF1571-E/SN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12F1571-E/SN | PIC12LF1571-I/SN | PIC12LF1571T-I/SN | PIC12F1571-I/SN | PIC12LF1572-E/SN |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-SOIC | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) | 8-SOIC (same) |
| Supply Voltage | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V |
| Temperature Grade | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) |
| FLASH Program Memory | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| 16-bit PWM Channels | 3 | 3 | 3 | 3 | 3 | 3 |
| Analog Comparators | 1 | 1 | 1 | 1 | 1 | 2 |
| CWG (Complementary Waveform Generator) | Yes | Yes | Yes | Yes | Yes | Yes (extended) |
| Packaging Format | Tube | Tube | Tube | Tape & Reel | Tube | Tube |
Key Differentiators
- Wide 1.8-3.6V supply supports single-cell Li-ion or 2x AA designs without external LDO (vs PIC12F1571-E/SN)
- Extended -40C to +125C temperature grade for industrial/automotive applications (vs PIC12LF1571-I/SN)
- Three independent 16-bit PWM channels with dedicated timers in an 8-pin package (vs PIC12LF1572-E/SN)
- On-chip NCO (Numerically Controlled Oscillator) enables digital frequency synthesis without external DAC (vs PIC12F1571-I/SN)
Design Notes
Estimated: at 32 MHz active mode the PIC12LF1571-E/SN draws approximately 2-3 mA from a 3.3 V supply. For battery-powered designs, gate the CPU clock aggressively with the IDLE and SLEEP modes and use the 16-bit PWM in hardware-trigger mode so the core can sleep between PWM periods. Place a 100 nF decoupling cap within 5 mm of the VDD pin and a 10 uF bulk cap on the supply rail. The wide 1.8-3.6V LF range eliminates the need for an external LDO when running from a single Li-ion cell.
At the extended -40C to +125C operating envelope (E suffix), verify output-stage drive strength at hot temperature by characterizing the high-current I/O pins. The 8-SOIC package has a theta_JA of approximately 100 C/W, so at 10 mA per pin total package dissipation should stay below 100 mW to keep the junction rise under 10C. For PWM-driven LED chains, derate the pin current to 5 mA per pin at 125C ambient.
Route the ICSPDAT/ICSPCLK pins (RA0/RA1) with short, parallel traces and a 4.7 kohm pull-up on MCLR to avoid programming interference. Keep analog inputs (RA0-RA5) physically separated from PWM outputs and high-current traces; place a ground guard ring around sensitive analog traces. The exposed VSS pin (pin 8) should be tied to a ground pour spanning at least 25% of the SOIC footprint to maximize thermal dissipation and provide a low-impedance return for digital switching noise.
Do not use the LF variant above 3.6V - exceeding VDD will damage the part; use the standard F variant PIC12F1571 for 5 V designs. The 5-bit DAC has limited resolution (31 steps) and is not suitable for audio; use the 10-bit ADC with PWM output for audio DACs. The 1.75 KB FLASH will overflow quickly if you include stdio or floating-point libraries; keep libraries minimal and prefer integer arithmetic in XC8.
Compliance Information
RoHS and REACH compliant per Microchip product page. The -E temperature grade extends to +125C but is not formally AEC-Q100 qualified; contact Microchip for automotive-grade variants (VAO suffix).
