PIC12LF1571T-I/RF - 8-bit MCU, 1.75KB Flash, 16-bit PWM | Microchip
MPN： PIC12LF1571T-I/RF ✓ 啟用中PIC12LF1571T-I/RF 概覽
A PIC microcontroller (Peripheral Interface Controller) is a family of 8-bit RISC-based microcontrollers from Microchip Technology built on a Harvard architecture with separate program and data buses. Within the PIC hierarchy this part belongs to PIC12 -> PIC12F -> PIC12LF1571. The LF suffix indicates a wide-voltage (2.5V/3.3V/5V) process node allowing operation down to 1.8V, ideal for battery-powered and energy-harvesting designs.
Key features of the PIC12LF1571T-I/RF include three independent 16-bit PWM channels for high-resolution timing, a 32 MHz internal oscillator, 6 I/O pins in an 8-pin UDFN with exposed thermal pad, and on-chip peripherals such as a 10-bit ADC, comparators, EUSART, MSSP (I2C/SPI) and configurable logic cells. The 16-bit PWM with 32 MHz clock delivers sub-microsecond edge resolution suited to LED dimming and motor control.
The PIC12LF1571 architecture uses a 14-bit instruction word with a 32-byte register file and a single-cycle ALU, enabling predictable deterministic timing critical for real-time control. The LF variant uses the same core as the PIC12F1571 but with a wider voltage range and lower-power Brown-out Reset and Watchdog Timer configuration, making it suitable for low-voltage battery systems.
Typical applications include high-resolution LED lighting control, stepper motor and DC motor drive PWM generation, switched-mode power supply control loops, fan speed controllers, and small sensor-conditioning platforms. Designers choose this part where board area is constrained and 16-bit PWM resolution removes the need for an external timer IC.
When designing with this part, ensure that the ICSP programming pins (ICSPCLK/ICSPDAT) are accessible on the PCB for in-circuit programming and debugging, and that the exposed thermal pad on the UDFN package is soldered for both thermal dissipation and mechanical reliability. The wide 1.8V-3.6V supply range simplifies integration into 2x AA, coin-cell, or Li-Ion battery systems.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical PCB design notes that complement the manufacturer datasheet for engineers selecting the PIC12LF1571T-I/RF.
直接替換替代品，適用於 PIC12LF1571T-I/RF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC12LF1571T-I/RF （相同外形與佔位） — 差異在於 ADC, Comparators, Operating Temperature, Package, Program Memory (Flash).
PIC12LF1571-I/RF
✅ 直接替換📋 參考替代品（不在目錄中）
PIC12F1571T-I/RF
✅ 直接替換📋 參考替代品（不在目錄中）
PIC12LF1572-I/RF
✅ 直接替換聯絡詢價
查看資料表 →PIC12LF1571T-I/SN
✅ 直接替換📋 參考替代品（不在目錄中）
PIC12LF1571T-I/MF
✅ 直接替換聯絡詢價
查看資料表 →PIC12LF1571T-I/RF 最大額定值與電氣特性
| Core | PIC 8-bit RISC |
| Program Memory (Flash) | 1.75 KB (1K x 14) |
| RAM | 128 bytes |
| CPU Speed | 32 MHz (16 MIPS) |
| 供應電壓 | 2.5 V / 3.3 V (1.8 V-3.6 V wide-range on LF) |
| I/O Pins | 6 |
| PWM Channels | 3 x 16-bit |
| ADC | 10-bit |
| 封裝 | 8-pin UDFN Exposed Pad |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (Industrial) |
| Communication | EUSART, MSSP (I2C/SPI) |
| Comparators | Yes |
| Configurable Logic Cells (CLC) | Yes |
| RoHS 狀態 | Compliant |
PIC12LF1571T-I/RF 腳位配置
| 腳位 1 | RA5/ICSPCLK — GPIO RA5 / In-Circuit Serial Programming clock |
| 腳位 2 | RA4/ICSPDAT — GPIO RA4 / In-Circuit Serial Programming data |
| 腳位 3 | RA3/MCLR/VPP — GPIO RA3 / Master Clear reset (active-low) |
| 腳位 4 | VSS — Ground reference |
| 腳位 5 | RA0 — GPIO RA0 / analog input |
| 腳位 6 | RA1 — GPIO RA1 / analog input |
| 腳位 7 | RA2 — GPIO RA2 / analog input |
| 腳位 8 | VDD — Positive supply (1.8V-3.6V) |
| 腳位 9 | EP — Exposed thermal pad - solder to PCB ground for thermal dissipation |
典型應用
PIC12LF1571T-I/RF 適用於 6 應用s: High-Resolution LED Lighting Control, DC Motor Speed Control (PWM), Switched-Mode Power Supply (SMPS) Control, Battery-Powered IoT Sensor Node, Stepper Motor Microstepping Indexer, Consumer Remote Control / IR Blaster.
High-Resolution LED Lighting Control
The PIC12LF1571T-I/RF fits LED lighting and color-mixing designs because its three independent 16-bit PWM channels, clocked from the 32 MHz internal oscillator, deliver sub-microsecond edge resolution. Compared with the typical 10-bit PWM in basic microcontrollers, 16-bit PWM eliminates visible flicker and supports precise warm-dim curves in high-CRI luminaires. The 1.8V-3.6V supply range accepts 2x AA or Li-Ion battery packs directly, simplifying driver architecture. The MCU pairs with LED driver ICs such as the LP8860 or TLC5947, driving them via SPI from the integrated MSSP peripheral while reading back analog current-sense signals with the 10-bit ADC for closed-loop brightness regulation.
推薦
DC Motor Speed Control (PWM)
The PIC12LF1571T-I/RF delivers 16-bit PWM precision suitable for small DC motor speed control in fans, pumps and toys. The 16-bit PWM channels drive MOSFET gate drivers such as the TC4427 or TI DRV8870 directly, eliminating the need for a separate timer IC. The 32 MHz CPU clock supports a feedback loop rate above 10 kHz when using the 10-bit ADC for back-EMF sensing. The wide 1.8V-3.6V supply supports battery-powered portable tools, and the 6 available I/O pins provide encoder input, fault input and direction control without multiplexing.
推薦
Switched-Mode Power Supply (SMPS) Control
The PIC12LF1571T-I/RF serves as the digital controller in low-power SMPS designs including buck, boost and SEPIC converters. Its 16-bit PWM provides 32 MHz clock-derived edge resolution that exceeds most analog PWM controllers, while the on-chip 10-bit ADC samples the feedback loop. The comparator peripheral can implement cycle-by-cycle current limiting, and the configurable logic cells (CLC) build hardware protection paths that operate independently of firmware latency. The LF variant's 1.8V minimum lets the MCU start up directly from a deeply discharged Li-Ion cell in battery chargers.
推薦
Battery-Powered IoT Sensor Node
The PIC12LF1571T-I/RF suits coin-cell and 2x AA battery IoT sensor nodes thanks to its 1.8V minimum operating voltage, low-power sleep modes, and small UDFN-8 footprint. The integrated EUSART and MSSP peripherals connect to sensors using I2C or SPI, while the 10-bit ADC reads analog sensors such as thermistors, photocells or battery voltage. The 1.75KB Flash accommodates small protocol stacks or simple edge-AI inference routines for anomaly detection. Compared with the PIC12F1571, the LF variant extends battery life at the low end of the discharge curve.
推薦
Stepper Motor Microstepping Indexer
The PIC12LF1571T-I/RF generates the indexer waveforms for a bipolar stepper motor driver such as the DRV8833 or A4988, using its three 16-bit PWM channels to deliver step, direction and enable signals with microstep timing precision. The wide supply range allows the MCU to share the 3.3V logic rail from the same regulator as the motor driver. The small UDFN-8 footprint fits onto compact camera gimbals, robotics actuators and 3D-printer extruder boards where board area is critical. The MSSP SPI port accepts host commands for position and velocity updates.
推薦
Consumer Remote Control / IR Blaster
The PIC12LF1571T-I/RF works as a low-cost consumer IR remote transmitter using its 16-bit PWM to generate precise 38 kHz / 56 kHz carrier frequencies with protocol-specific mark/space timing (NEC, RC5, RC6). The 32 MHz CPU provides sub-microsecond timing accuracy essential for reliable reception, while 1.75KB Flash accommodates lookup tables for multiple consumer A/V brands. The LF variant's low-voltage operation supports 2x AAA battery packs, and the small UDFN-8 footprint fits inside slim remote enclosures alongside an IR LED driven by a discrete transistor or BSS138 MOSFET.
推薦
推薦產品摘要
工程參考資料，適用於 PIC12LF1571T-I/RF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC12LF1571-I/RF | PIC12F1571T-I/RF | PIC12LF1572-I/RF | PIC12LF1571T-I/SN | PIC12LF1571T-I/MF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-UDFN Exposed Pad | 8-UDFN Exposed Pad (same) | 8-UDFN Exposed Pad (same) | 8-UDFN Exposed Pad (same) | 8-SOIC (different land pattern) | 8-DFN (different land pattern) |
| Flash Memory | 1.75 KB | 1.75 KB (same) | 1.75 KB (same) | 3.5 KB (+100%) | 1.75 KB (same) | 1.75 KB (same) |
| RAM | 128 B | 128 B (same) | 128 B (same) | 256 B (+100%) | 128 B (same) | 128 B (same) |
| Operating Voltage | 1.8V-3.6V | 1.8V-3.6V (same) | 2.0V-5.5V (F process) | 1.8V-3.6V (same) | 1.8V-3.6V (same) | 1.8V-3.6V (same) |
| PWM Channels | 3 x 16-bit | 3 x 16-bit (same) | 3 x 16-bit (same) | 3 x 16-bit (same) | 3 x 16-bit (same) | 3 x 16-bit (same) |
| Core Speed | 32 MHz | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) | 32 MHz (same) |
| Process Variant | LF (1.8V-3.6V) | LF (same) | F (5V-capable) | LF (same) | LF (same) | LF (same) |
主要差異化特點
- Wide-voltage LF process for battery applications (對比PIC12F1571T-I/RF)
- Same UDFN-8 footprint with 2x memory (對比PIC12LF1572-I/RF)
- 3x 16-bit PWM vs typical 10-bit PWM (對比PIC12F675)
設計說明
The PIC12LF1571T-I/RF is supplied in an 8-pin UDFN with an exposed thermal pad (EP) on pin 9. The exposed pad must be soldered to a copper pad on the PCB that is thermally tied to the ground plane. While the part consumes only milliwatts in typical operation, the EP provides the primary thermal path and a mechanical anchor. According to Microchip soldering guidelines, the EP land should be at least 1 square inch of copper pour connected to VSS through thermal vias for reliable reflow and long-term reliability.
Keep the ICSP programming pins (RA4/ICSPDAT and RA5/ICSPCLK) accessible on test points or a 0.1-inch header footprint to enable in-circuit programming and debugging with PICkit 3 or MPLAB Snap. The MCLR/VPP pin requires a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for proper reset behavior; do not leave MCLR floating or the part will not start reliably in noisy battery environments.
Place a 100 nF decoupling capacitor as close as possible to VDD (pin 8) and a bulk 10 uF capacitor on the supply rail. The PIC12LF1571T-I/RF has a wide voltage range (1.8V-3.6V) but Brown-out Reset voltage is factory-calibrated. For battery-powered designs add a series ferrite bead or 10 ohm resistor on VDD to suppress noise from switching regulators; for line-powered designs add a TVS diode to protect against ESD on connector pins.
Do not confuse the LF variant's 1.8V minimum with the F variant's 2.0V minimum; selecting the wrong process part for a 5V rail will cause parametric failure. The UDFN-8 package (RF suffix) is pin-compatible with the DFN-8 (MF suffix) and SOIC-8 (SN suffix) but requires different PCB land patterns - swapping packages during layout requires board re-spin. The 16-bit PWM channels are multiplexed with other peripherals; configure PPS (Peripheral Pin Select) before driving GPIO pins with PWM output.
合規資訊
RoHS and REACH compliant per Microchip product environmental compliance data. Not AEC-Q100 qualified - choose AEC-Q100 qualified PIC16 or dsPIC families for automotive.
