PIC12F1571-I/MF - 8-Bit MCU, 32MHz, 1.75KB Flash, 8-DFN | Microchip
料号： PIC12F1571-I/MF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.28 | $1.28 |
| 10 | $1.16 | $11.60 |
| 100 | $1.02 | $102.00 |
| 500 | $0.88 | $440.00 |
| 1,000 | $0.76 | $760.00 |
PIC12F1571-I/MF 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash/ROM), volatile working memory (RAM), and peripherals such as timers, ADCs, communication interfaces, and PWMs. The PIC12F1571 belongs to the 8-bit PIC12 family from Microchip, sitting within the broader category of embedded microcontrollers -> microcontrollers -> integrated circuits. This hierarchy places it alongside PIC16, PIC18, PIC24, and dsPIC devices as part of Microchip's PIC architecture.
Key differentiating features include three 16-bit PWMs with independent timers (versus typical 10-bit PWMs in this class), a 32 MHz internal oscillator supporting 16 MHz operation down to 2.3 V, an on-chip 8-bit DAC reference, and a configurable logic cell that lets designers route peripheral functions to pins without firmware changes. The device operates across 2.3 V to 5.5 V and offers 6 I/O pins plus 1 input-only pin, packaged in a space-saving 8-lead DFN footprint.
The PIC12F1571 uses Microchip's enhanced mid-range core (49 instruction set, 16-level hardware stack), enabling deterministic interrupt response within one instruction cycle. Its 16-bit PWM resolution is critical for applications such as LED dimming, full-color RGB lighting, and switch-mode power supply control, where 10-bit PWM produces visible color steps or audible ripple artefacts. The on-chip 5-bit DAC and reference module simplify analog set-point generation.
Typical applications include RGB LED color mixing, high-resolution stepper motor control, fan speed control via closed-loop PWM, digital power supply compensation, and battery-powered sensor nodes. In each case the 16-bit PWM resolution directly improves control smoothness and reduces external component count.
When designing with this MCU, derate CPU clock when VDD falls below 3.0 V (per the datasheet). Always use proper decoupling - 100 nF ceramic close to VDD plus 10 uF bulk - and place the exposed pad of the DFN package on a contiguous ground copper pour for thermal dissipation and low-impedance return.
This page synthesizes distributor pricing, parametric alternatives, and practical engineering notes drawn from manufacturer datasheets and reference designs, providing context not found in any single source.
直接替换替代料： PIC12F1571-I/MF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC12F1571-I/MF （相同外形与封装尺寸） ——差异在于 Operating Temperature, Comparators, Package, ADC, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
PIC12F1572-I/MF
✅ 直接替换✓ 有现货
$0.85 / 个
查看数据手册 →PIC12F1571-E/MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.89 / 个
查看数据手册 →PIC12F1571T-I/MF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.65 / 个
查看数据手册 →PIC12LF1571-I/MF
✅ 直接替换✓ 有现货
$0.58 / 个
查看数据手册 →PIC12F1501-I/MF
✅ 直接替换✓ 有现货
$0.59 / 个
查看数据手册 →PIC12F1571-I/MF 最大额定值与电气特性
| Program Memory Type | Flash |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM Size | 128 bytes |
| CPU Core | PIC (Enhanced Mid-Range 8-bit) |
| Maximum CPU Frequency | 32 MHz |
| Operating Voltage Range | 2.3 V to 5.5 V |
| 16-bit PWM Channels | 3 (independent) |
| I/O Pins | 6 |
| Package Type | 8-DFN (3x3 mm, exposed pad) |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40 C to +85 C (Industrial) |
| Comparators | Yes (1) |
| On-chip DAC / Reference | Yes (5-bit DAC, FVR) |
| MSL 等级 | MSL1 (per JEDEC J-STD-020) |
| RoHS 状态 | Compliant |
| Lead Free | Yes |
PIC12F1571-I/MF 引脚配置
| 引脚 1 | VDD — Positive supply voltage (2.3 V to 5.5 V) |
| 引脚 2 | RA5 — Bidirectional I/O / analog input / PWM3 |
| 引脚 3 | RA4 — Bidirectional I/O / analog input / PWM2 |
| 引脚 4 | RA3 — Input-only / MCLR / analog input |
| 引脚 5 | RA2 — Bidirectional I/O / analog input / PWM1 / comparator output |
| 引脚 6 | RA1 — Bidirectional I/O / analog input / comparator input |
| 引脚 7 | RA0 — Bidirectional I/O / analog input / ICSPDAT |
| 引脚 8 | VSS — Ground reference / exposed thermal pad |
典型应用
PIC12F1571-I/MF 适用于 7 应用s: RGB LED Color Mixing Lighting, Stepper Motor Microstepping Control, Switched-Mode Power Supply (SMPS) Digital Compensation, Fan Speed (PWM) Closed-Loop Control, Battery-Powered IoT Sensor Node, Automotive Interior LED Driver, Digital Potentiometer Replacement.
RGB LED Color Mixing Lighting
The PIC12F1571-I/MF's three independent 16-bit PWMs make it ideal for driving RGB LED strings with smooth color mixing. Each PWM channel drives one color channel (red, green, blue), and 16-bit resolution eliminates the visible color stepping that 10-bit PWM produces at low duty cycles - critical for high-end architectural lighting. The 32 MHz core runs fade algorithms in real time, while the 1.75 KB Flash stores lookup tables for color-temperature curves. According to the Microchip datasheet, the three PWMs can also be synchronized for white-channel dimming, giving the designer full control over CRI and color rendering. Battery-powered accent lighting benefits from the 2.3 V minimum supply.
推荐
Stepper Motor Microstepping Control
The PIC12F1571-I/MF generates the high-resolution step pulses needed for microstepping stepper motor drivers. Its 16-bit PWM provides 65,536 microsteps per full step versus 1,024 from a 10-bit PWM, dramatically reducing audible resonance and vibration in precision motion control. According to the Microchip datasheet, each PWM channel can be paired with a comparator for closed-loop current control, eliminating external op-amps. The 32 MHz core services the interrupt rate needed to maintain the microstep profile. Compact 8-pin DFN fits on small stepper driver PCBs used in camera autofocus, 3D printer extruders, and robotics actuators.
推荐
Switched-Mode Power Supply (SMPS) Digital Compensation
The PIC12F1571-I/MF delivers the PWM resolution required to implement digital loop compensation in small switched-mode power supplies. Its three 16-bit PWMs can drive primary-side FET timing, secondary-side synchronous rectification, and auxiliary functions with sub-1 ns effective duty resolution. Per the Microchip datasheet, the on-chip 5-bit DAC and fixed-voltage reference provide analog setpoints for voltage-mode or peak-current-mode control. The 32 MHz core closes the feedback loop at high PWM frequencies without saturating CPU bandwidth. Battery chargers for Li-ion cells and 12 V to 5 V POL converters are typical target applications.
推荐
Fan Speed (PWM) Closed-Loop Control
The PIC12F1571-I/MF's on-chip comparator and 16-bit PWM combine to deliver closed-loop fan speed control from a tachometer input. The comparator digitizes the tach feedback without external components, while the 16-bit PWM drives the fan control input at the 25 kHz or 50 kHz frequencies required by 4-wire PWM fans. Per the Microchip datasheet, the configurable logic cell routes the comparator output to a PWM fault input, shutting down the output on stalled-fan detection - critical for server and embedded thermal management. The 8-pin DFN footprint fits inside fan hubs and small blower assemblies.
推荐
Battery-Powered IoT Sensor Node
The PIC12F1571-I/MF suits coin-cell and single-cell Li-ion sensor nodes because it operates down to 2.3 V with low sleep current per the Microchip datasheet. Its 1.75 KB Flash and 128 B RAM host small sensor-fusion routines for temperature, humidity, and motion sensing, while the 16-bit PWM can drive an indicator LED or piezo buzzer for user feedback. Wake-on-timer or wake-on-comparator modes let the device sleep for years on a CR2032 cell. The compact 8-DFN (3x3 mm) package fits inside wearable bands and small sensor stickers.
推荐
Automotive Interior LED Driver
The PIC12F1571-I/MF -I grade operates across -40 C to +85 C and runs from 5 V automotive rails, making it suitable for interior lighting, ambient strip control, and backlight dimming. According to the Microchip datasheet, the three 16-bit PWMs can drive RGB ambient strips independently, supporting fade-in/fade-out transitions and color-temperature adjustment tied to day/night driving modes. Pairing with LIN or CAN transceivers (not integrated) enables body-network connectivity. For under-hood or powertrain applications, the -E (extended) temperature grade variant is recommended.
推荐
Digital Potentiometer Replacement
The PIC12F1571-I/MF's 16-bit PWM and on-chip DAC enable software-defined resistance, voltage, or current setpoints that replace mechanical potentiometers in production calibration. The PWM filtered by an external RC network produces a smooth DC voltage, while the 5-bit DAC provides a coarse reference. Per the Microchip datasheet, the comparator monitors the filtered voltage for closed-loop trimming. This eliminates manual trimpots in volume production and improves calibration accuracy - common in sensor module factory trim and audio gain adjustment.
推荐
推荐产品汇总
工程参考数据： PIC12F1571-I/MF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC12F1572-I/MF | PIC12F1571-E/MF | PIC12F1571T-I/MF | PIC12LF1571-I/MF | PIC12F1501-I/MF |
|---|---|---|---|---|---|---|
| Package | 8-DFN (3x3 mm) | 8-DFN (3x3 mm) - same | 8-DFN (3x3 mm) - same | 8-DFN (3x3 mm) - same | 8-DFN (3x3 mm) - same | 8-DFN (3x3 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 1.75 KB | 3.5 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB |
| RAM | 128 B | 256 B | 128 B | 128 B | 128 B | 128 B |
| Max CPU Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| PWM Resolution | 16-bit x 3 | 16-bit x 3 | 16-bit x 3 | 16-bit x 3 | 16-bit x 3 | 10-bit x 3 |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V |
| Temperature Grade | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
关键差异点
- Three independent 16-bit PWMs versus typical 10-bit PWMs in this class （对比 PIC12F1501-I/MF)
- Pin-compatible upgrade path to PIC12F1572 with double Flash and RAM （对比 PIC12F1571 (this product))
- Low-voltage PIC12LF1571 sibling for 1.8 V battery applications （对比 PIC12LF1571-I/MF)
设计说明
Place a 100 nF X7R ceramic decoupling capacitor within 2 mm of the VDD pin and a 10 uF bulk capacitor on the supply rail. According to the Microchip datasheet, the device may glitch if VDD droops below 2.3 V during PWM transitions; the bulk capacitor absorbs the high-current transients from output switching. For battery applications, add a 100 kohm pull-down on MCLR to avoid leakage paths.
The 8-DFN package dissipates heat primarily through the exposed thermal pad (pin 8). Connect this pad to a contiguous ground copper pour that extends at least 10 mm x 10 mm to keep junction temperature within the 85 C industrial limit. Estimated: in a typical 25 C ambient with 10 mm x 10 mm ground pour on a 2-layer FR-4 board, theta_JA is approximately 80 C/W, giving 100 mW safe dissipation before derating.
Keep analog input traces (RA0-RA5) short and isolated from PWM or digital switching signals on adjacent layers. Place the comparator input RC filter network within 5 mm of the pin to minimize noise pickup. For RGB LED applications, route all three PWM traces with matched length to maintain color synchronization. Use a four-layer stackup with continuous ground plane for best EMI performance.
Do not exceed the maximum clock-vs-VDD relationship: at VDD below 3.0 V the maximum CPU clock is limited to 16 MHz. Programming the OSCCON register for 32 MHz below 3.0 V will produce out-of-spec timing. Also note that the I2C and SPI peripherals require the PPS (peripheral pin select) feature to remap pins - default pin assignments do not match the 8-pin package out-of-the-box.
合规信息
RoHS and lead-free per Microchip product page. AEC-Q100 not qualified - for automotive choose AEC-Q100 qualified PIC portfolio. JEDEC MSL1 rating per J-STD-020.
