PIC16LF1566T-I/MV - 8-bit MCU, 14KB Flash, 32MHz, 28-UQFN | Microchip
MPN: PIC16LF1566T-I/MV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.84 | $18.40 |
| 100 | $1.58 | $158.00 |
| 500 | $1.39 | $695.00 |
| 1,000 | $1.22 | $1,220.00 |
PIC16LF1566T-I/MV Overview
What is an 8-bit microcontroller? An 8-bit MCU executes arithmetic and data operations on 8-bit-wide registers, balancing low cost, deterministic timing, and ease of programming against the multi-GHz 32-bit Cortex-M class. PIC16F-series devices sit in the middle of Microchip's 8-bit portfolio - simpler than dsPIC33 and PIC32, more capable than PIC10/12 in peripheral count - and are well-suited to cost-sensitive embedded designs that need decent analog integration, USB-free connectivity, and ultra-low standby current.
Key features include 14KB self-programmable Flash (8K x 14 words), 1KB SRAM, hardware Capacitive Voltage Divider (CVD) for robust touch sensing in the presence of moisture and noise, two 10-bit ADC blocks reaching a combined 600 ksps, up to 23 analog input channels routed through the CVD mux, an Enhanced Universal Synchronous/Asynchronous Receiver-Transmitter (EUSART), up to four PWM outputs, and multiple low-power sleep modes drawing under 1 uA typical. The XLP designation guarantees deep-sleep currents below typical competitive baselines.
The PIC16LF1566 is built on an enhanced mid-range 8-bit core with a hardware multiply, fixed 49-instruction set, and a 32MHz internal oscillator that eliminates an external crystal in many designs. The CVD front-end pairs the dual ADCs with an automated charge-transfer sequencer so that designers can implement slider, button, and proximity sensing without a dedicated touch IC - the same die in a 28/40/44-pin package options covers 23 to 34 analog channels.
Typical applications include capacitive-touch keypads and slider panels for kitchen appliances and HVAC controls, low-power IoT sensor nodes, battery-backed user-interface modules, general-purpose embedded controllers, LED lighting control with touch dimming, and automotive interior accessory modules below AEC-Q100 scope.
When designing with this MCU, reserve adequate PCB copper under the UQFN exposed pad for thermal relief and ground continuity; the small 4x4 mm footprint is footprint-compatible only with the 'MV' UQFN-28 variant of this family. Use the MPLAB X IDE with XC8 compiler for development and Microchip's mTouch CVD Library for tuning button/slider sensitivity.
This page synthesizes distributor pricing, drop-in cross-brand and same-family alternatives, and practical design notes derived from the manufacturer datasheet (document 40001817B) and live distributor inventory data as of 2026-09-23.
Drop-in alternatives for PIC16LF1566T-I/MV — 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 PIC16LF1566T-I/MV (same form factor and footprint) — differing in ADC, Core, Lead-Free / RoHS, Package, Program Memory (Flash).
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No drop-in alternatives available for this product.
Request AlternativesPIC16LF1566T-I/MV Maximum Ratings & Electrical Characteristics
| Core | PIC16F enhanced mid-range 8-bit |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data RAM | 1 KB |
| Max CPU Frequency | 32 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| ADC | 2 x 10-bit, up to 600 ksps combined |
| ADC Channels | Up to 23 analog inputs (28-pin package) |
| Capacitive Sensing | mTouch hardware CVD, mutual-cap driver support |
| PWM Channels | Up to 4 |
| Communication | EUSART (LIN capable), I2C, SPI |
| Timers | Multiple 8/16-bit timers |
| I/O Pins | Up to 23 (28-pin package) |
| Low-Power Modes | XLP sleep currents below 1 uA typical |
| Operating Temperature | -40C to +85C (Industrial 'I') |
| Package | 28-UQFN (4x4 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Lead-free, RoHS compliant |
PIC16LF1566T-I/MV Pin Configuration
| Pin 1 | RA5/ANA5 — GPIO / analog input (35 mA absolute max current) |
| Pin 2 | RA4/ANA4 — GPIO / analog input |
| Pin 3 | RA3/MCLR — GPIO / Reset input (Master Clear) |
| Pin 4 | RA2/ANA2 — GPIO / analog input |
| Pin 5 | RA1/ANA1 — GPIO / analog input |
| Pin 6 | RA0/ANA0 — GPIO / analog input |
| Pin 7 | Vss — Ground |
| Pin 8 | RC0/T1CKI — GPIO / Timer1 clock input |
| Pin 9 | RC1/CCP4 — GPIO / Capture-Compare-PWM4 |
| Pin 10 | RC2/PWM2 — GPIO / PWM2 output |
| Pin 11 | RC3/SCL — GPIO / I2C clock |
| Pin 12 | RC4/SDA — GPIO / I2C data |
| Pin 13 | RC5 — GPIO |
| Pin 14 | RC6/TX/CK — GPIO / EUSART TX / clock |
| Pin 15 | RC7/RX/DT — GPIO / EUSART RX / data |
| Pin 16 | Vdd — Positive supply (1.8V-3.6V) |
| Pin 17 | RB7/PWM1 — GPIO / PWM1 output |
| Pin 18 | RB6/PWM3 — GPIO / PWM3 output |
| Pin 19 | RB5/ANB5 — GPIO / analog input (touch-capable) |
| Pin 20 | RB4/ANB4 — GPIO / analog input (touch-capable) |
| Pin 21 | RB3/ANB3 — GPIO / analog input (touch-capable) |
| Pin 22 | RB2/ANB2 — GPIO / analog input (touch-capable) |
| Pin 23 | RB1/ANB1 — GPIO / analog input (touch-capable) |
| Pin 24 | RB0/ANB0/INT — GPIO / analog input / external interrupt |
| Pin 25 | RA7/OSC1 — GPIO / crystal oscillator input |
| Pin 26 | RA6/OSC2 — GPIO / crystal oscillator output |
| Pin 27 | GND_EP — Exposed thermal pad - must be soldered to ground |
| Pin 28 | Vss — Ground |
Typical Applications
PIC16LF1566T-I/MV is suitable for 6 applications: Capacitive Touch Keypads and Slider Panels, Battery-Powered IoT Sensor Nodes, LED Lighting and Touch-Dimming Controls, Appliance User-Interface Modules, General-Purpose Embedded Control Boards, Industrial Sensor Front-End and HMI Panels.
Capacitive Touch Keypads and Slider Panels
The PIC16LF1566T-I/MV is purpose-built for capacitive-touch user interfaces via its on-chip mTouch CVD (Capacitive Voltage Divider) module. The MCU exposes up to 23 analog channels routed through a hardware charge-transfer sequencer, enabling robust button, slider, and proximity sensing that tolerates moisture and electrical noise. With a 32 MHz instruction clock and 600 ksps combined ADC throughput, the device scans 10+ electrodes inside a single 8 ms frame, well below human-perceived latency. The 1.8V-3.6V XLP supply rail suits battery-powered remotes and AC-line-derived touch panels with an LDO front-end. Reference the Microchip mTouch CVD Library in MPLAB X for tuning, and pair with surface-mount guard rings plus driven-shield patterns on the PCB.
Recommended
Battery-Powered IoT Sensor Nodes
With XLP sleep currents below 1 uA typical and a 1.8V-3.6V supply, the PIC16LF1566T-I/MV fits coin-cell or 2xAA-powered sensor nodes that wake periodically to read sensors, transmit results, and return to deep sleep. The 32 MHz core wakes in microseconds so wake-and-transmit cycles cost little energy, and the EUSART peripheral handles low-energy protocol stacks (Cerebot, Modbus, or simple UART to BLE/Sigfox modules). Pair with EEPROMs like 25LC256 for data logging, and front-end sensors to the dual 10-bit ADCs for battery-voltage and environmental measurements.
Recommended
LED Lighting and Touch-Dimming Controls
Commercial and residential LED drivers needing touch dimming can use the PIC16LF1566T-I/MV to implement a slider interface that feeds PWM duty-cycle commands to a constant-current driver. The MCU's up to 4 PWM channels support RGBA or warm-white + cool-white two-channel tunable white, while the integrated ADC reads the touch position with 10-bit resolution. The 4x4 mm UQFN enables integration inside slim fixtures; the 1.8V-3.6V supply aligns with common LED driver primary-side rails after a small LDO. Add an EUSART link for DMX or wireless remote modules.
Recommended
Appliance User-Interface Modules
White-goods OEMs designing washing machines, dishwashers, coffee makers, and microwave ovens use the PIC16LF1566T-I/MV to add glass-surface capacitive touch control with minimal PCB area. The 23 GPIOs drive LCD or segment displays, read rotary encoders, and scan an mTouch array on the front panel. Industrial temperature grade ('I' suffix -40C to +85C) supports kitchen-hood and dishwasher ambient conditions. The wide memory budget (14KB Flash) allows full IEC 60730 safety-class-B classifiable firmware without external storage.
Recommended
General-Purpose Embedded Control Boards
Educational and maker-grade boards benefit from the PIC16LF1566T-I/MV when designers want an 8-bit platform with modern capacitive-sensing features and a small footprint. The PIC's heritage instruction set is heavily documented, and XC8 in MPLAB X IDE produces deterministic ANSI-C code for real-time applications. Use EUSART/SPI/I2C peripherals to expose expansion headers for sensors, motor drivers, and displays; the small 28-UQFN footprint allows compact control boards that fit onto any breadboard with a $0.50 carrier PCB.
Recommended
Industrial Sensor Front-End and HMI Panels
Industrial HMI panels leverage the PIC16LF1566T-I/MV's dual ADC banks to read 4-20 mA current loops, thermistors, and capacitive control keys from a single 28-pin package. The EUSART with LIN slave-mode support fits automotive-quality vehicle dashboards and off-highway machinery where LIN is still standard. Industrial temperature grade ('I' suffix) supports factory-floor enclosures. The -40C to +85C range covers outdoor building-automation gateways; XLP keeps backup-battery current draw negligible during outage ride-through scenarios.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1566T-I/MV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1567-I/MV | PIC16F1566-I/MV | PIC16F18856-I/MV |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-UQFN (4x4) MV | 28-UQFN (4x4) MV - same | 28-UQFN (4x4) MV - same | 28-UQFN (4x4) MV - same |
| Flash Memory | 14 KB | 14 KB | 14 KB | 14 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB |
| Max CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 5.5V | 1.8V to 5.5V |
| Capacitive Touch (mTouch CVD) | Yes - 23 channels | Yes - up to 34 channels | Yes - 23 channels | No hardware CVD |
| ADC | 2 x 10-bit, 600 ksps | 3 x 10-bit, higher ksps | 2 x 10-bit, 600 ksps | Up-to 32 channels 10-bit + 12-bit ADC |
| Low-Power (XLP) | Yes (LF suffix) | Yes (LF suffix) | Standard (no LF) | Standard |
Key Differentiators
- Hardware mTouch CVD module reduces firmware overhead (vs PIC16F18856-I/MV)
- 28-pin UQFN (MV) footprint is shared with newer PIC16F1 family (vs PIC16F18856-I/MV)
- XLP deep-sleep current below 1 uA is industry-leading for 8-bit PIC touch MCUs (vs PIC16F1566-I/MV)
Design Notes
The 28-UQFN (4x4 mm) exposed thermal pad must be soldered to a continuous ground plane on the top layer of the PCB; this is the primary heat-dissipation path for the MV package. Without a properly soldered EP, junction-to-ambient thermal resistance rises sharply and may limit continuous 32 MHz operation in high-ambient-temperature enclosures. Maintain at least 4 thermal vias in the EP under-pad design, and provide a copper pour area >= 100 mm^2 on the opposite PCB layer for optimal 32 MHz continuous draw.
Capacitive-touch PCB design requires careful separation between the touch sensor pattern and adjacent signal traces. Route the analog-cap pins (ANA, ANB channels) over a hatched ground pour that does not extend underneath the touch pads themselves; route digital signals (PWM, EUSART) on a separate layer above the touch sensor pattern. A minimum 2 mm air gap between touch pads and any non-touch plane reduces false triggers. Reference the Microchip mTouch CVD Layout Guide (AN1492) for guard-ring and driven-shield implementations.
Do not exceed 3.6V Vdd on the LF (low-voltage) variants - LF is rated to 3.6V max, while F versions accept up to 5.5V. Powering an LF part at 5V causes immediate latch-up. Also note that the 'T' suffix in PIC16LF1566T-I/MV denotes Tape-and-Reel, not a different temperature grade - the 'I' suffix (-40C to +85C) is the industrial-temp marker. Always place a 0.1 uF decoupling capacitor within 3 mm of Vdd pin 16, plus a 10 uF bulk capacitor at the regulator output.
Estimated: At 32 MHz and 3.3V Vdd, the PIC16LF1566 draws ~7 mA active; in deep sleep with WDT enabled, the typical sleep current is below 1 uA. For battery-life estimates, use the formula t_battery_life ~= C_battery_mAh / ((active_mA * t_on_fraction) + (sleep_uA * (1 - t_on_fraction))) which for a CR2032 coin cell (220 mAh) yields multi-year life at <1% active duty cycle. Disable the brown-out reset (BOR) module if you need below 1.6V operation - LF parts support BOR disabled mode with internal LDO bypass.
The 28-UQFN (MV) package's recommended PCB land pattern is documented in the package drawing section of the datasheet (40001817B). Use a 0.25 mm lead-pitch pad design with NSMD (non-solder-mask-defined) pads of approximately 0.40 mm wide and 0.30 mm long, plus a 4.4 mm x 4.4 mm exposed-pad opening with no solder mask. Stencil design should use 0.12 mm-thick stainless steel with 80-100% area-ratio openings on the EP (multiple small apertures preferred over one large opening for reliable solder release).
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade ('I' suffix), -40C to +85C. Not AEC-Q100 qualified - for automotive applications refer to a separate automotive-grade part number from Microchip's automotive PIC MCU portfolio.
