PIC16LF1575-I/ST - 8-Bit MCU, 14KB Flash, 32MHz, TSSOP-14 | Microchip
MPN: PIC16LF1575-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.05 | $2.05 |
| 10 | $1.83 | $18.30 |
| 100 | $1.62 | $162.00 |
| 500 | $1.41 | $705.00 |
| 1,000 | $1.2 | $1,200.00 |
PIC16LF1575-I/ST Overview
An 8-bit PIC microcontroller is a single-chip computer built on a Harvard-architecture RISC core. The PIC16 family sits in Microchip's mid-range portfolio, between the PIC10/12 baseline series and the PIC18 enhanced series, and is widely used in cost-sensitive embedded designs. Within power management, PIC MCUs commonly provide supervisor, sequencing, and PWM control functions; within the MCU taxonomy, the PIC16LF1575 belongs to the PIC16(L)F157x sub-family distinguished by its 16-bit PWM peripherals rather than the typical 10-bit PWM modules of standard PIC16F devices.
Key features include four independent 16-bit PWM channels with dedicated timers, a 10-bit Analog-to-Digital Converter with up to 8 input channels, an Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART), and two comparators. The core runs up to 32MHz providing 8 MIPS, and the 14KB self-programmable Flash supports in-application updates.
This device is commonly used in LED lighting controllers, general-purpose sensor interface boards, low-cost motor drive signal generators, and as a companion MCU for supervisory housekeeping in larger systems.
When designing, evaluate the internal oscillator's tolerance against any timing-critical UART or PWM requirement; an external crystal or the internal 32kHz LFOSC may be required for tight accuracy. The TSSOP-14 footprint requires adequate thermal relief and a clean analog ground path for ADC accuracy.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC16LF1575-I/ST — 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 PIC16LF1575-I/ST (same form factor and footprint) — differing in Package, ADC, Mounting Type, Operating Temperature, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1574-I/ST
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF1575-E/SL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF1554-I/ST
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF1559-I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.55 / Unit
View Datasheet →PIC16LF1508-I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.04 / Unit
View Datasheet →PIC16LF1575-I/ST Maximum Ratings & Electrical Characteristics
| Core | PIC16 enhanced mid-range 8-bit RISC |
| Program Memory (Flash) | 14 KB (8K x 14) |
| Data RAM | 1 KB |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Operating Voltage Range | 1.8 V to 3.6 V (LF suffix) |
| PWM Channels | 4 x 16-bit |
| Comparators | 2 |
| EUSART | 1 |
| Package | 14-pin TSSOP |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (Industrial) |
| RoHS Status | Compliant |
PIC16LF1575-I/ST Pin Configuration
| Pin 1 | RA3/AN3/VREF+ — Digital I/O / analog input / ADC positive reference |
| Pin 2 | RA4/AN4 — Digital I/O / analog input |
| Pin 3 | RA5/AN5 — Digital I/O / analog input |
| Pin 4 | VSSOP — Ground reference |
| Pin 5 | RC0 — Digital I/O |
| Pin 6 | RC1 — Digital I/O |
| Pin 7 | RC2 — Digital I/O |
| Pin 8 | RC3 — Digital I/O |
| Pin 9 | RC4 — Digital I/O |
| Pin 10 | RC5 — Digital I/O |
| Pin 11 | RA0/AN0 — Digital I/O / analog input |
| Pin 12 | RA1/AN1 — Digital I/O / analog input |
| Pin 13 | RA2/AN2 — Digital I/O / analog input |
| Pin 14 | VDDOP — Positive supply (1.8 V to 3.6 V) |
Typical Applications
PIC16LF1575-I/ST is suitable for 6 applications: Multi-Channel LED Lighting Controller, Battery-Powered Sensor Node, Small DC/DC or DC/AC Converter Controller, Housekeeping Supervisor MCU, Hobbyist and Educational Embedded Platform, Industrial Auxiliary Control.
Multi-Channel LED Lighting Controller
The PIC16LF1575-I/ST is ideal for multi-channel LED lighting controllers because it integrates four independent 16-bit PWM channels with dedicated timers, allowing smooth dimming and color mixing across RGB or RGBW LED strings. The 1.8V to 3.6V supply makes it directly compatible with single-cell Li-ion drivers commonly used in portable lighting, and the 14KB Flash is sufficient to host dimming curves, fade algorithms, and DMX-style protocols. MFCMOS LF process, coupled with the 16-bit PWM resolution, also enables high-quality white-balance control that is hard to achieve with 8-bit or 10-bit PWM modules.
Recommended
Battery-Powered Sensor Node
The PIC16LF1575-I/ST fits battery-powered sensor nodes thanks to its 1.8V to 3.6V LF supply range and low-power PIC16 mid-range core, which can run from a coin cell or two alkaline cells. Its 10-bit ADC reads temperature, light, or battery voltage directly, and the four 16-bit PWMs can drive indicator LEDs or simple haptic feedback without extra timers. Combined with 1KB RAM and 14KB Flash, the device handles typical BLE-paired sensor firmware stacks. MFLF CMOS low-voltage operation also extends sleep-mode battery life in intermittent sampling applications.
Recommended
Small DC/DC or DC/AC Converter Controller
The PIC16LF1575-I/ST is well suited as the digital control heart of a small DC/DC or DC/AC converter. The four 16-bit PWMs with independent timers deliver the resolution required for closed-loop voltage or current control, while the 10-bit ADC samples the feedback node accurately enough for non-isolated converters. MFLF process, paired with 32MHz / 8 MIPS throughput, is fast enough to run digital control loops above 50kHz. This makes the part appropriate for sub-100W converter signal generation in industrial auxiliary supplies.
Recommended
Housekeeping Supervisor MCU
The PIC16LF1575-I/ST is a strong choice for rail sequencing and supervisory housekeeping in larger systems. Its 14KB Flash is plenty for state-machine supervisor firmware, and its PWMs can generate watchdog pulses or fan-control signals while the 10-bit ADC monitors supply rails. MFLF low-voltage supply allows it to start up before the main 3.3V rail settles, which is critical for proper power sequencing. Its TSSOP-14 footprint also fits cleanly alongside a larger application processor without taking board space.
Recommended
Hobbyist and Educational Embedded Platform
The PIC16LF1575-I/ST is an attractive platform for hobbyist and educational use because of Microchip's free MPLAB X IDE, XC8 compiler, and the extensive PIC16 community ecosystem. With 14KB Flash, 1KB RAM, and standard peripherals (EUSART, ADC, PWMs, comparators), it covers classic embedded exercises from blinky LEDs to UART communication. MFLF low-voltage tolerance also means it can be powered safely from any 3.3V USB-UART adapter used for programming. This makes it a good teaching vehicle for PIC assembly and C development.
Recommended
Industrial Auxiliary Control
The PIC16LF1575-I/ST suits industrial auxiliary control panels where it must drive relays, read buttons, and talk to a higher-level controller via UART. The TSSOP-14 industrial-grade part operates from -40C to +85C and survives factory floor environments, while four 16-bit PWMs handle relay timing or solid-state relay drive signals. MFLF process ensures deterministic timing at 32MHz for protocol generation. Its small footprint also makes it ideal for backplane signal-conditioning mezzanine boards.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1575-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1574-I/ST | PIC16LF1575-E/SL | PIC16LF1554-I/ST | PIC16LF1559-I/P | PIC16LF1508-I/P |
|---|---|---|---|---|---|---|
| Package | TSSOP-14 (I/ST) | TSSOP-14 - same | SOIC-14 - same die, different footprint | TSSOP-14 - same | PDIP-20 - same family | PDIP-20 - same LF family |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 14 KB | 7 KB | 14 KB | 7 KB | 14 KB | 7 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB | 256 B |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| PWM Channels | 4 x 16-bit | 4 x 16-bit | 4 x 16-bit | 2 x 10-bit | 3 x 10-bit | 4 x 10-bit |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Maximum CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 20 MHz | 20 MHz |
Key Differentiators
- Four 16-bit PWMs (not 10-bit) (vs PIC16LF1554-I/ST)
- 14 KB Flash doubles the code space of the LF1574 (vs PIC16LF1574-I/ST)
- Same TSSOP-14 footprint across the LF1575 and LF1575-E/SL (vs PIC16LF1575-E/SL)
Design Notes
The PIC16LF1575-I/ST supply range is 1.8 V to 3.6 V. Use a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin and a bulk 1 uF to 10 uF capacitor at the supply rail to suppress switching transients from the PWM outputs. The LF part must not be powered from a 5 V rail; choose the F variant if 5 V operation is required. A clean analog ground path under the device pin count improves ADC accuracy.
Place the decoupling capacitor as close as possible to the VDD pin and route the ground return directly to the board's analog ground plane. For TSSOP-14 footprints, expose a small thermal pad of copper under the part tied to VSS for thermal relief, although the part dissipates only tens of milliwatts at full CPU load. Keep the ICSPDAT/ICSCLK traces short and not split across ground planes to keep in-circuit programming reliable.
When using the on-chip PWM outputs to drive external power switches, route the PWM traces away from analog ADC inputs and the EUSART lines. Series-termination resistors of 33 ohm to 47 ohm close to the MCU pin help when driving long cables to MOSFET gates. For UART communications at 32 MHz HFINTOSC, expect up to 2% baud-rate error; use the 16 MHz HFINTOSC with PLL or an external crystal if tight UART accuracy is required.
Do not assume the F (2.3 V to 5.5 V) variant is drop-in for the LF (1.8 V to 3.6 V) - swapping LF with F in a 3.3 V-only design is safe, but swapping LF with F where the supply drops below 2.3 V (e.g. on depleted Li-ion cells) will brown out the F variant. Estimate: at 32 MHz / 3.3 V, the MCU draws roughly 6 mA active and sub-uA in sleep, so a coin-cell design must spend >99% of the time in sleep.
Compliance Information
Industrial temperature grade -40C to +85C. RoHS and lead-free confirmed; halogen-free status was not explicitly stated in the verified data.
