PIC16LF1578-I/SO - 8-bit MCU, 7KB Flash, 32MHz, 20-SOIC | Microchip
MPN: PIC16LF1578-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.96 | $0.96 |
| 10 | $0.88 | $8.80 |
| 100 | $0.78 | $78.00 |
| 500 | $0.69 | $345.00 |
| 1,000 | $0.62 | $620.00 |
| 3,000 | $0.55 | $1,650.00 |
PIC16LF1578-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and peripheral interfaces such as timers, ADCs, and communication ports. Within the broader hierarchy, an 8-bit MCU sits below 16-bit and 32-bit microcontrollers in arithmetic width and code density; the PIC16 family from Microchip uses a RISC-based 8-bit core optimized for deterministic interrupt response, low power consumption, and small footprint designs. This places the PIC16LF1578 in the category of "general-purpose low-power MCUs" alongside competing families such as the Atmel/Microchip ATtiny and the STMicroelectronics STM8.
Key features of the PIC16LF1578 include four independent 16-bit PWMs with complementary outputs, ideal for LED lighting, power conversion, and motor control. The device also integrates a Configurable Logic Cell (CLC), Complementary Waveform Generator (CWG), Numerically Controlled Oscillator (NCO), and Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART). The Peripheral Pin Select (PPS) feature allows flexible remapping of digital peripherals to physical I/O pins, simplifying PCB layout. With 14 I/O pins, the device supports applications that need more digital channels than a typical 8-pin MCU can offer.
Internally, the PIC16LF1578 uses Microchip's enhanced mid-range 8-bit core executing instructions in a single cycle (except branches) at up to 8 MIPS when running at 32 MHz. The 10-bit ADC provides up to 17 input channels (depending on variant) with acquisition time control, and the 5-bit DAC supports programmable reference voltages for slope compensation or bias generation. The CLC enables combinational and sequential logic functions to be implemented in hardware without external gates.
Typical applications include LED lighting drivers (RGBW dimming, color mixing), DC-DC converters, battery chargers, power supplies with digital control loops, motor and fan control with PFC, and consumer appliances requiring small pin-count MCUs with rich analog peripherals.
When designing with this MCU, ensure that the Vdd decoupling network includes a 0.1 uF ceramic capacitor placed as close as possible to the Vdd pin, and add a bulk capacitor (1 uF or larger) if the load transients are significant. The PPS mapping must be configured in firmware before any peripheral can drive its assigned pin, otherwise the pin will remain a high-impedance input.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for sourcing and evaluating the PIC16LF1578-I/SO.
Drop-in alternatives for PIC16LF1578-I/SO — 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 PIC16LF1578-I/SO (same form factor and footprint) — differing in Package, ADC, Program Memory (Flash), Core, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1578-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1579-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1579-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1575T-I/SL
✅ Drop-In✓ In Stock
$0.88 / Unit
View Datasheet →PIC16LF15325-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1554-I/ST
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF1578-I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC16 8-bit enhanced mid-range |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data RAM | 512 bytes |
| Maximum CPU Speed | 32 MHz (8 MIPS) |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 14 |
| ADC | 10-bit |
| DAC | 5-bit |
| 16-bit PWM Channels | 4 (with complementary outputs) |
| Comparators | Yes |
| CWG (Complementary Waveform Generator) | Yes |
| CLC (Configurable Logic Cell) | Yes |
| NCO (Numerically Controlled Oscillator) | Yes |
| EUSART | Yes |
| PPS (Peripheral Pin Select) | Yes |
| Package | 20-pin SOIC (SO) |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16LF1578-I/SO Pin Configuration
| Pin 1 | VDD — Positive supply voltage |
| Pin 2 | RA5 — Digital I/O / analog input |
| Pin 3 | RA4 — Digital I/O / analog input |
| Pin 4 | RA3 — Digital I/O / analog input / MCLR |
| Pin 5 | RC5 — Digital I/O / analog input |
| Pin 6 | RC4 — Digital I/O / analog input |
| Pin 7 | RC3 — Digital I/O / analog input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RC2 — Digital I/O / analog input |
| Pin 10 | RC1 — Digital I/O / analog input |
| Pin 11 | RC0 — Digital I/O / analog input |
| Pin 12 | RA2 — Digital I/O / analog input / DAC output |
| Pin 13 | RA1 — Digital I/O / analog input |
| Pin 14 | RA0 — Digital I/O / analog input |
| Pin 15 | RA7 — Digital I/O / analog input |
| Pin 16 | RA6 — Digital I/O / analog input |
| Pin 17 | RC7 — Digital I/O / analog input |
| Pin 18 | RC6 — Digital I/O / analog input |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage |
Typical Applications
PIC16LF1578-I/SO is suitable for 6 applications: Multi-Channel LED Lighting Drivers, Digital-Controlled DC-DC Converters, Battery-Powered Sensor Hubs, Hobby Robotics and Stepper Control, Consumer Appliance Control Boards, Power Supply Monitoring and Sequencing.
Multi-Channel LED Lighting Drivers
The PIC16LF1578-I/SO's four 16-bit PWMs with complementary outputs and 10-bit ADC make it well-suited for driving multi-channel LED strings in RGBW and tunable-white fixtures. Each PWM provides independent timing with programmable dead-band, eliminating the need for an external LED driver chip. With 32 MHz operation the PWM frequency can be set above 20 kHz, avoiding audible noise from the LED's current loop. The 1.8V-3.6V operating range supports battery-powered architectural and stage lighting. Placed between a small buck converter and the LED strings with low-side MOSFETs, the MCU delivers flicker-free dimming down to 0.1% duty cycle. The 7 KB Flash holds color-mixing tables and DMX-512 or DALI protocol stacks for professional installations.
Recommended
Digital-Controlled DC-DC Converters
The PIC16LF1578-I/SO's CLC, CWG, NCO, and 10-bit ADC integrate the building blocks required for closed-loop digital power conversion in non-isolated buck, boost, and SEPIC converters. The 5-bit DAC provides programmable slope compensation for peak-current-mode control without an external reference. With 32 MHz core speed the MCU can run a 100 kHz control loop with sufficient headroom for housekeeping tasks. The 1.8V minimum supply rail extends operating time on partially depleted Li-ion cells. Compared with a pure analog control IC, this PIC16 variant adds telemetry, fault logging, and PMBus-style communication through the EUSART peripheral. Use the CWG module to generate complementary gate-drive waveforms with hardware dead-time, removing software timing jitter.
Recommended
Battery-Powered Sensor Hubs
The PIC16LF1578-I/SO's 1.8V-3.6V low-voltage operation and PIC16 mid-range core's efficient sleep modes make it appropriate for battery-powered sensor hubs in IoT edge nodes. The 10-bit ADC reads temperature, light, and motion sensor outputs, while the EUSART interfaces with an external Bluetooth or LoRa transceiver for wireless reporting. The 512-byte RAM is sufficient to buffer short sensor packets without overflowing. Sleep current in the nanoampere range extends coin-cell battery life to multiple years in typical duty-cycled applications. The 20-SOIC package offers hand-solderable access for prototype builds while supporting tape-and-reel for volume assembly. PPS allows the same PCB to route peripherals differently across product variants.
Recommended
Hobby Robotics and Stepper Control
The PIC16LF1578-I/SO's four 16-bit PWMs, CWG module, and 10-bit ADC make it suitable for hobby robotics platforms driving stepper motors, DC motors, or small servos. The CWG generates the phase-step pulse trains with hardware dead-band insertion, while the ADC reads current-sense amplifiers for stall detection. The 32 MHz core drives 8-step microstepping at rates up to 50 kHz without burdening firmware. The 7 KB Flash comfortably holds trapezoidal motion profiles for multi-axis CNC-style machines. EUSART or PPS-routed SPI connects to a host PC or another MCU for G-code interpretation, enabling low-cost educational robotics kits.
Recommended
Consumer Appliance Control Boards
The PIC16LF1578-I/SO's combination of PWM, ADC, and CLC simplifies consumer appliance boards such as coffee machines, air purifiers, and small kitchen devices where multiple analog inputs (temperature, humidity, flow) and PWM outputs (heaters, pumps, fans) must be coordinated. The CLC implements latch and edge-detect logic in hardware for safety interlocks without burdening firmware. The 14 I/O pins support a typical front-panel user interface with 4 buttons and a 7-segment LED display. The industrial temperature range (-40 C to +85 C) covers indoor appliance environments. Compared with a discrete analog control board, this MCU provides programmable parameters, fault logging, and easier EMC compliance through firmware-driven control.
Recommended
Power Supply Monitoring and Sequencing
The PIC16LF1578-I/SO's 10-bit ADC, EUSART, and PPS-supported GPIO allow it to act as a multi-rail power supply monitor and sequencer in networking, server, and telecom equipment. The MCU reads each rail's output voltage through resistor dividers, controls MOSFET load switches via GPIO, and reports status to a baseboard management controller through the EUSART. The 32 MHz core provides sub-millisecond fault response time. The 5-bit DAC supplies a programmable reference for comparator-based over-voltage detection without an external reference IC. Compared with dedicated sequencer ASICs, this PIC16 variant offers programmability for platform-specific timing requirements.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1578-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1578-I/SO | PIC16LF1579-I/SO | PIC16F1579-I/SO | PIC16LF1575T-I/SL | PIC16LF15325-I/SO | PIC16LF1554-I/ST |
|---|---|---|---|---|---|---|---|
| Package | 20-SOIC | 20-SOIC | 20-SOIC | 20-SOIC | 20-SOIC | 20-SOIC | 20-TSSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage Range | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 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 | 1.8 V to 3.6 V |
| Maximum CPU Speed | 32 MHz (8 MIPS) | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| 16-bit PWM Channels | 4 | 4 | 4 | 4 | 3 | 2 | 2 |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| I/O Pins | 14 | 14 | 14 | 14 | 12 | 18 | 14 |
Key Differentiators
- Lowest minimum voltage (1.8V) in the PIC16F157x family (vs PIC16F1578-I/SO)
- Four 16-bit PWMs with complementary outputs and CLC (vs PIC16LF15325-I/SO)
- Integrated 5-bit DAC on-chip (vs PIC16LF1554-I/ST)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor within 3 mm of the Vdd pins (pin 1 and pin 20 on the 20-SOIC). For designs with switching peripherals enabled (PWM, EUSART, ADC), add a bulk 1 uF-10 uF tantalum or ceramic capacitor on the same Vdd trace to handle transient current demands. The PIC16LF1578-I/SO operates down to 1.8V, but the ADC accuracy degrades below 2.0V; for precision analog work, hold Vdd above 2.7V.
Route the ICSP programming signals (ICSPCLK/ICSPDAT on RA0/RA1 by default) to a 6-pin header even if you do not plan in-field firmware updates. Microchip's PICkit and ICD programmers require these pins to be accessible. Avoid placing resistors in series with the ICSP lines; if series resistance is necessary for protection, keep it below 100 ohms to maintain signal integrity at 5V programming voltages.
Configure Peripheral Pin Select (PPS) locking before relying on remapped peripherals. The PPS registers must be unlocked, written, and then locked with PPSLOCK = 0; otherwise the mapping is lost on reset. Also ensure MCLR (pin 4) is either tied to Vdd through a 10 kohm resistor or left as a reset input; floating MCLR causes erratic reset behavior under EMI. For battery-powered designs, tie MCLR to Vdd directly to disable the reset and save the pull-up current.
Estimated: at 32 MHz core clock and 3.3V Vdd, the PIC16LF1578-I/SO draws approximately 4 mA active current, dissipating about 13 mW. In the 20-SOIC package with theta_JA around 60 C/W, junction temperature rise is roughly 0.8 C above ambient - well below thermal limits. For sleep-mode designs, the nanoampere-level sleep current makes thermal management trivial; verify by measuring Vdd current with a uCurrent or equivalent low-side current monitor.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC16F1578-E/SO extended-temperature or PIC16F1578-H/SO high-temperature variants for automotive-grade designs.
