PIC12LF1571-I/MF - 8-Bit MCU, 32MHz, 1.75KB Flash | Microchip
MPN: PIC12LF1571-I/MF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.95 | $0.95 |
| 10 | $0.86 | $8.60 |
| 100 | $0.74 | $74.00 |
| 500 | $0.65 | $325.00 |
| 1,000 | $0.58 | $580.00 |
PIC12LF1571-I/MF Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and a mix of analog and digital peripherals. PIC12F-series MCUs from Microchip use a RISC architecture optimized for deterministic, low-latency control loops with low active and sleep current. PIC12LF variants add an 'L' suffix for the low-voltage (1.8 V to 3.6 V) operating range, which extends battery life in portable designs.
Key features of the PIC12LF1571-I/MF include three 16-bit PWMs with independent timers for high-resolution outputs, a 10-bit ADC with computation, on-chip comparators, and an internal configurable logic cell (CLC). The device operates from 1.8 V to 3.6 V supply, supports eXtreme Low Power (XLP) sleep currents down to the nA range, and provides in-circuit serial programming (ICSP) for field upgrades.
The 8-pin DFN package exposes a thermal pad that must be soldered to the PCB ground plane for both electrical grounding and thermal dissipation. The architecture is built around a 14-bit instruction word with a single accumulator and hardware stack, prioritizing deterministic interrupt latency over raw throughput.
Typical applications for this device include LED lighting and color-mixing control, stepper motor drivers, power-conversion feedback loops, and compact sensor nodes in IoT edge devices where the small 3x3 mm footprint is required.
When designing with this MCU, place a 100 nF decoupling capacitor close to VDD and tie the exposed pad to a clean ground pour. Ensure ICSP programming lines (ICSPCLK/ICSPDAT) are accessible on the PCB for in-circuit programming.
This page consolidates distributor pricing, drop-in alternatives, and design considerations drawn from multiple sources, delivering practical engineering context beyond what is found in the manufacturer datasheet.
Drop-in alternatives for PIC12LF1571-I/MF 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 PIC12LF1571-I/MF (same form factor and footprint) β differing in Mounting Type, ADC, Comparators, Core Architecture, Operating Temperature.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC12LF1571T-I/MF
β Drop-Inβ In Stock
$0.36 / Unit
View Datasheet βPIC12F1571-I/MF
β Drop-Inβ In Stock
$0.76 / Unit
View Datasheet βPIC12F1571T-I/MF
β Drop-Inβ In Stock
$0.65 / Unit
View Datasheet βPIC12LF1571-E/MF
β Drop-Inπ Reference alternative (not in catalog)
PIC12LF1571-I/MF Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC (RISC) |
| Instruction Word Width | 14-bit |
| CPU Speed | 32 MHz (8 MIPS) |
| Program Memory (Flash) | 1.75 KB (1K x 14) |
| Data RAM | 128 bytes |
| Supply Voltage Range | 1.8 V to 3.6 V |
| PWM Modules | 3 x 16-bit (independent timers) |
| ADC | 10-bit (with computation) |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 8-DFN (3x3 mm) with exposed pad |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Low-Power Features | XLP (eXtreme Low Power) Sleep mode |
PIC12LF1571-I/MF Pin Configuration
| Pin 1 | RA5/ICSPDAT/CCP1/PWM1 β Bidirectional I/O, ICSP data, CCP/PWM channel 1 |
| Pin 2 | RA4/ICSPCLK/PWM2 β Bidirectional I/O, ICSP clock, PWM channel 2 |
| Pin 3 | RA3/MCLR/VPP β Bidirectional I/O, Master Clear (reset), programming voltage |
| Pin 4 | RA2/AN2/T0CKI/PWM3 β Bidirectional I/O, analog input 2, Timer0 clock, PWM channel 3 |
| Pin 5 | RA1/AN1/CIN-/ICSPCLK β Bidirectional I/O, analog input 1, comparator inverting input |
| Pin 6 | RA0/AN0/CIN+/ICSPDAT β Bidirectional I/O, analog input 0, comparator non-inverting input |
| Pin 7 | VSS β Ground reference |
| Pin 8 | VDD β Positive supply voltage (1.8 V to 3.6 V) |
| Pin 9 | EP β Exposed thermal pad - tie to ground (VSS) per datasheet |
Typical Applications
PIC12LF1571-I/MF is suitable for 6 applications: LED Lighting and Color Control, Stepper Motor Driver Control, Switching Power Supply Feedback, IoT Edge Sensor Nodes, Portable Consumer Electronics, Industrial Sensor Conditioning.
LED Lighting and Color Control
The PIC12LF1571-I/MF is well suited for LED lighting and color-mixing applications because it integrates three independent 16-bit PWM channels with dedicated timers, allowing precise RGB or RGBW dimming control without CPU intervention. Per the Microchip datasheet, the 16-bit PWM resolution at 32 MHz CPU provides sub-microsecond pulse accuracy, which prevents visible flicker in dimming ramps and supports smooth color transitions. The 1.8-3.6 V supply range enables direct connection to single-cell Li-ion battery packs, while the small 8-DFN (3x3 mm) footprint fits inside MR16 lamp form factors. Designers can drive external MOSFETs from the I/O pins at 25 mA source/sink to switch LED strings efficiently, and the 10-bit ADC with computation allows closed-loop current sensing for accurate lumen output.
Recommended
Stepper Motor Driver Control
The PIC12LF1571-I/MF's three 16-bit PWM outputs and hardware comparators make it a strong fit for low-cost micro-stepping stepper motor controllers. Each PWM can drive one phase of a bipolar stepper via external H-bridge drivers, while the comparators handle back-EMF zero-cross detection for sensorless stall detection. According to the datasheet, the 32 MHz CPU executes the commutation loop in microseconds, enabling smooth rotation up to several thousand RPM. The 128-byte RAM is sufficient for a small step table and PID state, while the 1.75 KB flash holds the stepper algorithm plus UART bootloader. The XLP sleep mode extends battery life in portable or hand-held motion controllers, and the 8-DFN footprint fits inside the small motor housing.
Recommended
Switching Power Supply Feedback
The PIC12LF1571-I/MF serves as a low-cost digital feedback controller in isolated and non-isolated switching power supplies. Its 10-bit ADC with computation samples the output voltage and current sense signals, while the high-speed comparators trigger peak current mode control without software latency. Per the Microchip datasheet, the 16-bit PWM resolution at 32 MHz allows sub-1% duty-cycle adjustment, supporting tight output regulation in buck, boost, and flyback topologies. The internal configurable logic cell (CLC) can implement programmable hardware protection such as cycle-by-cycle current limiting, reducing firmware burden. With 1.75 KB flash and 128 B RAM, the device can host a complete digital compensator for sub-100 W converter designs, replacing analog PWM controllers in compact SMPS modules.
Recommended
IoT Edge Sensor Nodes
The PIC12LF1571-I/MF's XLP sleep current in the nA range and 1.8-3.6 V supply make it ideal for battery-powered IoT sensor endpoints that spend most of their time asleep. The device wakes on interrupt from a sensor, performs an ADC measurement, runs the 16-bit PWM to drive an actuator, and returns to sleep - all within a few milliseconds. According to the datasheet, average current consumption can be reduced below 1 uA with proper duty cycling, enabling multi-year battery life from a single CR2032 coin cell. The 8-pin DFN (3x3 mm) footprint fits inside the smallest sensor housings, and the four I/O pins handle UART or I2C communication plus two analog sensor channels for compact wireless sensor designs.
Recommended
Portable Consumer Electronics
The PIC12LF1571-I/MF is well matched to portable consumer devices such as fitness bands, wireless earbuds, and remote controls, where small size, low voltage, and low power are critical. The 1.8 V minimum supply allows direct operation from a single-cell Li-ion or Li-polymer battery, eliminating the need for an LDO. Per the datasheet, the three 16-bit PWMs can drive vibration motors, status LEDs, and audio buzzers independently, while the 10-bit ADC monitors battery voltage and user input buttons. The 8-DFN (3x3 mm) package plus 0.5 mm pitch is ideal for compact wearables, and ICSP allows field firmware updates for product differentiation across SKUs without hardware changes.
Recommended
Industrial Sensor Conditioning
The PIC12LF1571-I/MF can condition analog signals from industrial sensors such as thermistors, RTDs, strain gauges, and 4-20 mA current loops in distributed I/O modules. Its 10-bit ADC with computation provides hardware averaging and oversampling, while the integrated comparators enable threshold detection and alarm generation. According to the manufacturer datasheet, the -40C to +85C industrial operating temperature range covers most factory environments, and the 1.8-3.6 V supply supports 3.3 V backplane rails directly. The 1.75 KB flash and 128 B RAM are sufficient for linearization lookup tables, sensor calibration constants, and Modbus RTU slave communication via UART, making the MCU a complete single-chip analog front end for cost-sensitive industrial nodes.
Recommended
Recommended Products Summary
Engineering reference data for PIC12LF1571-I/MF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC12LF1571T-I/MF | PIC12F1571-I/MF | PIC12F1571T-I/MF | PIC12LF1571-E/MF |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 |
| Supply Voltage Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V |
| CPU Speed | 32 MHz (8 MIPS) | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (Extended) |
| PWM Channels | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit |
| Packaging Form | Tray/Matrix (Tube) | Tape & Reel | Tray/Matrix | Tape & Reel | Tray/Matrix |
Key Differentiators
- Lowest minimum voltage in PIC12F1571 family (vs PIC12F1571-I/MF)
- Extended temperature grade option (vs PIC12LF1571-E/MF)
- Three independent 16-bit PWMs (vs PIC12F683-I/P)
Design Notes
Solder the exposed thermal pad (EP, pin 9) of the 8-DFN package to a grounded copper pour to provide both electrical grounding and thermal dissipation. The pad is electrically connected to VSS internally. Recommended land pattern uses NSMD (non-solder mask defined) pads with stencil apertures of 0.4-0.5 mm diameter on each of the 8 pads plus a 1.5x1.5 mm aperture for the central thermal pad. Place a 100 nF X7R decoupling capacitor within 2 mm of the VDD pin, and route VDD/VSS traces as wide as possible to minimize inductance.
The PIC12LF1571-I/MF operates from 1.8 V to 3.6 V. Below 2.0 V, the ADC accuracy degrades slightly per datasheet, and the Flash program memory write/erase operations require VDD >= 2.2 V. For battery-powered designs, estimate that a CR2032 coin cell (3.0 V nominal, 220 mAh) drops below 2.0 V at roughly 70% depth of discharge, leaving approximately 150 mAh usable. Use brown-out reset (BOR) configured to 2.0 V to prevent code corruption during battery end-of-life.
When migrating code from PIC12F1571 to PIC12LF1571, do not assume the LF variant accepts 5 V signals on its I/O pins - the absolute maximum VDD is 3.6 V, and over-voltage will damage the part. Also note that the LF part has slightly different ADC acquisition time requirements; consult the datasheet's electrical characteristics section rather than copying PIC12F1571 constants directly. Verify the /MCLR pin is configured correctly: it must be tied to VDD through a 10 kohm pull-up for normal operation, or left open only if the internal MCLR is disabled in configuration bits.
Keep the ICSP programming signals (ICSPCLK on RA4 and ICSPDAT on RA5) accessible on the PCB, even if they are not used in the application. Production boards may need firmware updates, and routing ICSPCLK/ICSPDAT to test pads or header pins saves rework later. If RA4 or RA5 must be used as I/O, ensure the ICSP connector can still reach them via test pads or via the in-circuit programming header. The 10 kohm pull-up on MCLR (pin 3) should be located close to the MCU to prevent programming failures due to capacitive loading.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified in the standard industrial grade; the -E extended temp variant is rated -40C to +125C but is not AEC-Q100 qualified. For AEC-Q100 automotive applications, consult Microchip's automotive-grade PIC portfolio.
